Communication method and apparatus, terminal device, and network device

Abstract

The present application relates to the technical field of communications, and discloses a communication method and apparatus, a terminal device, and a network device. The method comprises: if a terminal device has finished sending an uplink wake-up signal at the m-th millisecond, slot or symbol, after the (m+d)-th millisecond, slot or symbol, determining that second-type PRACH resources are valid, or after the (m+d)-th millisecond, slot or symbol, determining that the period of PRACH resources is changed from a first period to a second period. In this way, because it is determined that the second-type PRACH resources are valid or it is determined that the period of the PRACH resources is changed from the first period to the second period, the terminal device can send second-type PRACHs or send PRACHs according to the second period, so as to send more PRACHs, thereby implementing adaptive sending of PRACHs, and thus reducing the power consumption by adaptively sending PRACHs.

Description

Communication method and apparatus, terminal device and network device

[0001] The present application claims priority to the prior application with the application name of "communication method and apparatus, terminal device and network device" and the application number of 202410867901.4, which was filed on June 29, 2024, and the content of the prior application is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of communication, in particular to a communication method and apparatus, a terminal device and a network device. BACKGROUND

[0003] In a communication system, a terminal device needs to perform time-frequency synchronization or the terminal device needs to access a network, at this time, a transmission process of a related signal / channel will be involved. For example, a network device can need to send a synchronization signal block (SSB) to a terminal device, so as to realize time-frequency synchronization through the SSB transmission process. For another example, a terminal device can need to send a physical random access channel (PRACH) to a network device, so as to realize access to the network through the PRACH transmission process. However, the transmission process of these related signals / channels often needs to consume a certain power consumption of the network device and the terminal device.

[0004] At present, network energy savings (network power saving) is a problem that operators and device manufacturers are concerned about, and network energy savings are very beneficial to reducing operating costs and green environmental protection. Therefore, how to perform transmission of signals / channels under network energy savings in order to reduce power consumption as much as possible still needs further research. SUMMARY

[0005] The present application provides a communication method and apparatus, a terminal device and a network device, in order to realize adaptive transmission of PRACH or adaptive transmission of SSB, so as to save power consumption.

[0006] In a first aspect, a communication method of the present application is applied to a terminal device, comprising:

[0007] If the terminal device sends an uplink wake-up signal on the mth millisecond, time slot or symbol, it is determined that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0008] It can be seen that, since the second type of PRACH resource is determined to be valid after the (m+d)th millisecond, time slot or symbol or the period of the PRACH resource is determined to change from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the terminal device can send the second type of PRACH or send the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from sending less PRACH to sending more PRACH, thereby achieving adaptive PRACH sending, and further achieving power saving through adaptive PRACH sending.

[0009] In some possible examples, the uplink wake-up signal is one or more specific preambles in the first type of PRACH resource, and the period of the first type of PRACH resource is greater than the period of the second type of PRACH resource; or,

[0010] The uplink wake-up signal is one or more specific preambles in the PRACH resource with the first period.

[0011] The second aspect is a communication method of the present application, applied to a network device, comprising:

[0012] If the network device receives the uplink wake-up signal at the mth millisecond, time slot or symbol, the network device determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or determines that the period of the PRACH resource changes from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0013] It can be seen that, since the second type of PRACH resource is determined to be valid after the (m+d)th millisecond, time slot or symbol or the period of the PRACH resource is determined to change from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the network device can receive the second type of PRACH or receive the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from receiving less PRACH to receiving more PRACH, thereby achieving adaptive PRACH receiving, and further achieving power saving through adaptive PRACH receiving.

[0014] The third aspect is a communication method of the present application, applied to a terminal device, comprising:

[0015] If the terminal device receives the PEI at the mth millisecond, time slot or symbol, and the PRACH resource indication information in the PEI is a valid value, then the second type of PRACH resource is determined to be valid after the (m+d)th millisecond, time slot or symbol, or the period of the PRACH resource is determined to change from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0016] It can be seen that, because the second type of PRACH resource is determined to be valid after the (m+d)th millisecond, time slot or symbol, or the period of the PRACH resource is determined to change from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the terminal device can send the second type of PRACH or send the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally sending less PRACH to sending more PRACH, thereby achieving adaptive sending of the PRACH, and further achieving power saving by adaptive sending of the PRACH.

[0017] A fourth aspect is a communication method of the present application, applied to a network device, and including:

[0018] determining that the PRACH resource indication information in the PEI is a valid value, and sending the PEI; if the network device finishes sending the PEI at the mth millisecond, time slot or symbol, then the second type of PRACH resource is determined to be valid after the (m+d)th millisecond, time slot or symbol, or the period of the PRACH resource is determined to change from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0019] It can be seen that, because the second type of PRACH resource is determined to be valid after the (m+d)th millisecond, time slot or symbol, or the period of the PRACH resource is determined to change from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the network device can receive the second type of PRACH or receive the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally receiving less PRACH to receiving more PRACH, thereby achieving adaptive receiving of the PRACH, and further achieving power saving by adaptive receiving of the PRACH.

[0020] A fifth aspect is a communication method of the present application, applied to a terminal device, and including:

[0021] If the terminal device receives the PEI at the mth millisecond, time slot or symbol, and the SSB burst indication information in the PEI is a valid value, it is determined that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol, or it is determined that the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, where m is a positive integer, and d is an integer greater than or equal to 0.

[0022] It can be seen that, since it is determined that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol, or it is determined that the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the terminal device can receive the second type of SSB or receive the SSB according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally receiving less SSB to receiving more SSB, thereby realizing adaptive reception of the SSB. In addition, since the (m+d)th millisecond, time slot or symbol is more likely to be before the paging frame (PF) or paging occasion (PO) associated with the PEI, the terminal device can receive the second type of SSB burst or the SSB burst of the second period before the PF / PO, so that the terminal device can reach downlink time-frequency synchronization as soon as possible and start receiving paging as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0023] In a sixth aspect, a communication method is provided. The method is applied to a network device and includes the following steps:

[0024] If the network device sends the PEI at the mth millisecond, time slot or symbol, it is determined that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol, or it is determined that the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, where m is a positive integer, and d is an integer greater than or equal to 0.

[0025] It can be seen that since the second type of SSB burst is determined to be valid after the (m+d)th millisecond, time slot or symbol or the period of the SSB burst is determined to be changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the network device can send the second type of SSB or send the SSB according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally sending less SSB to sending more SSB, thereby realizing adaptive sending of the SSB. In addition, since the (m+d)th millisecond, time slot or symbol is more likely to be before the PF or PO associated with the PEI, the network device can send the second type of SSB burst or the SSB burst of the second period before the PF / PO, so that the network device can quickly perform downlink time-frequency synchronization with the terminal device and quickly start sending paging.

[0026] A seventh aspect is a communication method of the present application, applied to a terminal device, comprising:

[0027] If the terminal device receives the PEI and the SSB burst indication information in the PEI is a valid value, the second type of SSB burst is determined to be valid after the first start frame, or the period of the SSB burst is determined to be changed from the first period to the second period after the first start frame.

[0028] It can be seen that since the period of the SSB burst is determined to be changed from the first period to the second period after the first start frame, the terminal device can receive the second type of SSB or receive the SSB according to the second period after the first start frame, so as to change from originally receiving less SSB to receiving more SSB, thereby realizing adaptive receiving of the SSB. In addition, since the first start frame is a start frame in a paging cycle in which the PF associated with the PEI is located, the terminal device can quickly achieve downlink time-frequency synchronization and quickly start receiving paging through the second type of SSB burst or the SSB burst of the second period.

[0029] An eighth aspect is a communication method of the present application, applied to a network device, comprising:

[0030] The SSB burst indication information in the PEI is determined to be a valid value, and the PEI is sent; if the network device finishes sending the PEI, the second type of SSB burst is determined to be valid after the first start frame, or the period of the SSB burst is determined to be changed from the first period to the second period after the first start frame.

[0031] It can be seen that, since the period of the SSB burst is changed from the first period to the second period after the first starting frame, the network device can send the second type of SSB or receive the SSB according to the second period after the first starting frame, so as to change from originally sending less SSBs to sending more SSBs, thereby realizing adaptive sending of SSBs. In addition, since the first starting frame is a starting frame in a paging period in which the PF associated with the PEI is located, the network device can perform downlink time-frequency synchronization with the terminal device as soon as possible and start sending paging as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0032] A ninth aspect is a communication method of the present application, applied to a terminal device, comprising:

[0033] If the terminal device receives the paging on the mth millisecond, time slot or symbol, and the PRACH resource indication information in the paging is a valid value, it is determined that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or it is determined that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0034] It can be seen that, since the period of the SSB burst is changed from the first period to the second period after the first starting frame, the network device can send the second type of SSB or receive the SSB according to the second period after the first starting frame, so as to change from originally sending less SSBs to sending more SSBs, thereby realizing adaptive sending of SSBs. In addition, since the first starting frame is a starting frame in a paging period in which the PF associated with the PEI is located, the network device can perform downlink time-frequency synchronization with the terminal device as soon as possible and start sending paging as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0035] In some possible examples, the PRACH resource indication information occupies a reserved bit in the paging, or the PRACH resource indication information occupies a remaining bit in a short message in the paging.

[0036] A tenth aspect is a communication method of the present application, applied to a network device, comprising:

[0037] It is determined that the PRACH resource indication information in the paging is a valid value, and the paging is sent; if the network device finishes sending the paging on the mth millisecond, time slot or symbol, it is determined that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or it is determined that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0038] It can be seen that, since the second type of PRACH resource is determined to be valid after the (m+d)th millisecond, time slot or symbol or the period of the PRACH resource is determined to change from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the network device can receive the second type of PRACH or receive the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally receiving less PRACH to receiving more PRACH, thereby realizing adaptive reception of the PRACH.

[0039] The eleventh aspect is a communication method of the present application, applied to a terminal device, comprising:

[0040] If the terminal device receives a paging on the mth millisecond, time slot or symbol, and the SSB burst indication information in the paging is a valid value, then the second type of SSB burst is determined to be valid after the (m+d)th millisecond, time slot or symbol, or the period of the SSB burst is determined to change from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0041] It can be seen that, since the second type of SSB burst is determined to be valid after the (m+d)th millisecond, time slot or symbol or the period of the SSB burst is determined to change from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the terminal device can receive the second type of SSB or receive the SSB according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally receiving less SSB to receiving more SSB, thereby realizing adaptive reception of the SSB. In addition, since the (m+d)th millisecond, time slot or symbol is more likely to be before the time domain position of the PRACH resource, the terminal device can receive the second type of SSB burst or the SSB burst of the second period before the time domain position of the PRACH resource, so that the terminal device can reach downlink time-frequency synchronization as soon as possible and start sending the PRACH as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0042] In some possible examples, the SSB burst indication information occupies reserved bits in the paging, or the SSB burst indication information occupies remaining bits in a short message in the paging.

[0043] The twelfth aspect is a communication method of the present application, applied to a network device, comprising:

[0044] determining that the SSB burst indication information in the paging is a valid value, sending the paging, and determining that a second type of SSB burst is valid after a (m+d)th millisecond, time slot or symbol, or determining that a period of the SSB burst is changed from a first period to a second period after the (m+d)th millisecond, time slot or symbol, m being a positive integer and d being an integer greater than or equal to 0, if the network device sends the paging on a mth millisecond, time slot or symbol.

[0045] It can be seen that, since the second type of SSB burst is determined to be valid after the (m+d)th millisecond, time slot or symbol, or the period of the SSB burst is determined to be changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the network device can send the second type of SSB or send the SSB according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally sending less SSB to sending more SSB, thereby realizing adaptive sending of the SSB. In addition, since the (m+d)th millisecond, time slot or symbol is more likely to be before the time domain location of the PRACH resource, the network device can send the second type of SSB burst or the SSB burst of the second period before the time domain location of the PRACH resource, so that the network device can perform downlink time-frequency synchronization with the terminal device as soon as possible and start receiving the PRACH as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0046] Thirteenth aspect, a communication method of the present application, applied to a terminal device, comprising:

[0047] If the terminal device receives the paging and the SSB burst indication information in the paging is a valid value, the terminal device determines that a second type of SSB burst is valid after a second starting frame, or determines that a period of the SSB burst is changed from a first period to a second period after the second starting frame.

[0048] It can be seen that, since the period of the SSB burst is determined to be changed from the first period to the second period after the second starting frame, the terminal device can receive the second type of SSB or receive the SSB according to the second period after the second starting frame, so as to change from originally receiving less SSB to receiving more SSB, thereby realizing adaptive receiving of the SSB. In addition, since the second starting frame is a starting frame in a paging cycle in which a PF associated with the paging is located, the terminal device can reach downlink time-frequency synchronization as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0049] Fourteenth aspect, a communication method of the present application, applied to a network device, comprising:

[0050] determining that the SSB burst indication information in the paging is a valid value, and sending the paging; and determining that a second type of SSB burst is valid after a second starting frame, or determining that a period of the SSB burst is changed from a first period to a second period after the second starting frame, if the network device has finished sending the paging.

[0051] It can be seen that, since the period of the SSB burst is changed from the first period to the second period after the first starting frame, the network device can send the second type of SSB or receive the SSB according to the second period after the first starting frame, so as to change from originally sending less SSBs to sending more SSBs, thereby realizing adaptive sending of the SSB. In addition, since the second starting frame is a starting frame in a paging period in which a PF of the paging is located, the network device can perform downlink time-frequency synchronization with the terminal device as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0052] A fifteenth aspect is a communication method of the present application, applied to a terminal device, and including:

[0053] If the terminal device receives a RAR at an mth millisecond, time slot or symbol, and the SSB burst indication information in the RAR is a valid value, then determining that a second type of SSB burst is valid after an (m+d)th millisecond, time slot or symbol, or determining that a period of the SSB burst is changed from a first period to a second period after the (m+d)th millisecond, time slot or symbol, m being a positive integer and d being an integer greater than or equal to 0.

[0054] It can be seen that, since the second type of SSB burst is determined to be valid after the (m+d)th millisecond, time slot or symbol, or the period of the SSB burst is determined to be changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the terminal device can receive the second type of SSB or receive the SSB according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally receiving less SSBs to receiving more SSBs, thereby realizing adaptive receiving of the SSB. In addition, since the (m+d)th millisecond, time slot or symbol is before Msg4 or Msg3, the terminal device can receive the second type of SSB burst or the SSB burst of the second period before Msg4 or Msg3, so that the terminal device can reach downlink time-frequency synchronization as soon as possible and start receiving Msg4 or start sending Msg3 as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0055] A sixteenth aspect is a communication method of the present application, applied to a network device, and including:

[0056] determining that the SSB burst indication information in the RAR is a valid value, and transmitting the RAR; if the network device transmits the RAR on the mth millisecond, time slot or symbol, determining that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol, or determining that the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m being a positive integer and d being an integer greater than or equal to 0.

[0057] It can be seen that, since the second type of SSB burst is determined to be valid after the (m+d)th millisecond, time slot or symbol, or the period of the SSB burst is determined to be changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the network device can transmit the second type of SSB burst or the SSB burst of the second period after the (m+d)th millisecond, time slot or symbol, so as to change from transmitting fewer SSB bursts to transmitting more SSB bursts, thereby realizing adaptive transmission of SSB. In addition, since the (m+d)th millisecond, time slot or symbol is before the Msg4 or the Msg3, the network device can transmit the second type of SSB burst or the SSB burst of the second period before the Msg4 or the Msg3, so that the network device can perform downlink time-frequency synchronization with the terminal device as soon as possible and start transmitting the Msg4 or start receiving the Msg3 as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0058] A seventeenth aspect is a communication method of the present application, applied to a terminal device; comprising:

[0059] receiving indication information, the indication information indicating whether the PRACH resource indication information is or is not a valid value and whether the SSB burst indication information is or is not a valid value.

[0060] An eighteenth aspect is a communication method of the present application, applied to a network device; comprising:

[0061] transmitting indication information, the indication information indicating whether the PRACH resource indication information is or is not a valid value and whether the SSB burst indication information is or is not a valid value.

[0062] In this way, the indication information can indicate the PRACH resource indication information and the SSB burst indication information, thereby facilitating saving signaling overhead.

[0063] In some possible examples, one code point of the indication information indicates that both the PRACH resource indication information and the SSB burst indication information are valid values;

[0064] A fourth codepoint of the four codepoints of the indication information indicates that neither the PRACH resource indication information nor the SSB burst indication information is valid.

[0065] In some possible examples, a first codepoint of the four codepoints of the indication information indicates that both the PRACH resource indication information and the SSB burst indication information are valid;

[0066] A second codepoint of the four codepoints of the indication information indicates that the PRACH resource indication information is valid and the SSB burst indication information is not valid;

[0067] A third codepoint of the four codepoints of the indication information indicates that the PRACH resource indication information is not valid and the SSB burst indication information is valid;

[0068] A fourth codepoint of the four codepoints of the indication information indicates that neither the PRACH resource indication information nor the SSB burst indication information is valid.

[0069] In some possible examples, one or more codepoints of the four codepoints of the indication information indicate that both the PRACH resource indication information and the SSB burst indication information are valid, and one codepoint of the four codepoints of the indication information, other than the one or more codepoints, indicates that neither the PRACH resource indication information nor the SSB burst indication information is valid;

[0070] The one or more codepoints further indicate one of: a first period combination, a second period combination, a third period combination, or a fourth period combination, or the one or more codepoints further indicate one of: a first duration combination, a second duration combination, a third duration combination, or a fourth duration combination.

[0071] The first period combination is a period of the second type of PRACH resource and a period of the second type of SSB burst.

[0072] The second period combination is a second period of the PRACH resource and a second period of the SSB burst.

[0073] The third period combination is a period of the second type of PRACH resource and a second period of the SSB burst.

[0074] The fourth period combination is a second period of the PRACH resource and a period of the second type of SSB burst.

[0075] The first duration combination is a duration of the second type of PRACH resource and a duration of the second type of SSB burst.

[0076] a second duration combination of a second duration of the PRACH resource and a second duration of the SSB burst;

[0077] a third duration combination of a duration of the second type of PRACH resource and a second duration of the SSB burst;

[0078] a fourth duration combination of a second duration of the PRACH resource and a duration of the second type of SSB burst.

[0079] In some possible examples, one or more of the four codepoints of the indication information indicates that the PRACH resource indication information is a valid value, and one of the four codepoints of the indication information other than the one or more codepoints indicates that the PRACH resource indication information is not a valid value;

[0080] The one or more codepoints further indicate one of: a first period combination, a second period combination, a third period combination, or a fourth period combination, or the one or more codepoints further indicate one of: a first duration combination, a second duration combination, a third duration combination, or a fourth duration combination.

[0081] In some possible examples, one or more of the four codepoints of the indication information indicates that the SSB burst indication information is a valid value, and one of the four codepoints of the indication information other than the one or more codepoints indicates that the SSB burst indication information is not a valid value;

[0082] The one or more codepoints further indicate one of: a first period combination, a second period combination, a third period combination, or a fourth period combination, or the one or more codepoints further indicate one of: a first duration combination, a second duration combination, a third duration combination, or a fourth duration combination.

[0083] In some possible examples, one or more of the eight codepoints of the indication information indicates that both the PRACH resource indication information and the SSB burst indication information are valid values, and one of the eight codepoints of the indication information other than the one or more codepoints indicates that both the PRACH resource indication information and the SSB burst indication information are not valid values;

[0084] The one or more codepoints further indicate one of: a first period combination, a second period combination, a third period combination, or a fourth period combination, or the one or more codepoints further indicate one of: a first duration combination, a second duration combination, a third duration combination, or a fourth duration combination.

[0085] The first period combination is a period of the second type of PRACH resource and a period of the second type of SSB burst.

[0086] The second periodicity combination is a second periodicity of the PRACH resource and a second periodicity of the SSB burst.

[0087] The third periodicity combination is a periodicity of the second type of PRACH resource and a second periodicity of the SSB burst.

[0088] The fourth periodicity combination is a second periodicity of the PRACH resource and a periodicity of the second type of SSB burst.

[0089] The first duration combination is a duration of the second type of PRACH resource and a duration of the second type of SSB burst.

[0090] The second duration combination is a second duration of the PRACH resource and a second duration of the SSB burst.

[0091] The third duration combination is a duration of the second type of PRACH resource and a second duration of the SSB burst.

[0092] The fourth duration combination is a second duration of the PRACH resource and a duration of the second type of SSB burst.

[0093] In some possible examples, one or more of the four code points of the indication information indicates that the PRACH resource indication information is a valid value, and one code point of the four code points of the indication information other than the one or more code points indicates that the PRACH resource indication information is not a valid value.

[0094] The one or more code points further indicate a periodicity of the second type of PRACH resource or a second periodicity of the PRACH resource, or the one or more code points further indicate a duration of the second type of PRACH resource or a second duration of the PRACH resource.

[0095] In some possible examples, one or more of the remaining four code points of the indication information indicates that the SSB burst indication information is a valid value, and one code point of the remaining four code points of the indication information other than the one or more code points indicates that the SSB burst indication information is not a valid value.

[0096] The one or more code points further indicate a periodicity of the second type of SSB burst or a second periodicity of the SSB burst, or the one or more code points further indicate a duration of the second type of SSB burst or a second duration of the SSB burst.

[0097] The nineteenth aspect is a communication method of the present application, applied to a terminal device, comprising:

[0098] After the terminal device receives the Msg4, it is determined to terminate the second type of PRACH resource or the second type of SSB burst, or it is determined that the period of the PRACH resource is changed from the second period to the first period or the period of the SSB burst is changed from the second period to the first period.

[0099] In this way, after the terminal device receives the Msg4, the terminal device can use the RRC configuration in the Msg4 to set the properties of the second type of PRACH resource or the period update of the PRACH resource, and / or the terminal device can use the RRC configuration in the Msg4 to set the properties of the second type of SSB burst or the period update of the SSB burst, so as to terminate or give up the second type of PRACH resource or the second type of SSB burst triggered by the UL WUS, indicated by the PEI, indicated by the paging or indicated by the RAR, or it is determined that the period of the PRACH resource is changed from the second period to the first period or the period of the SSB burst is changed from the second period to the first period.

[0100] The twentieth aspect is a communication method of the present application, applied to a network device, comprising:

[0101] After the network device sends the Msg4, it is determined to terminate the second type of PRACH resource or the second type of SSB burst, or it is determined that the period of the PRACH resource is changed from the second period to the first period or the period of the SSB burst is changed from the second period to the first period.

[0102] In this way, after the network device sends the Msg4, the network device can use the RRC configuration in the Msg4 to set the properties of the second type of PRACH resource or the period update of the PRACH resource, and / or the network device can use the RRC configuration in the Msg4 to set the properties of the second type of SSB burst or the period update of the SSB burst, so as to terminate or give up the second type of PRACH resource or the second type of SSB burst triggered by the UL WUS, indicated by the PEI, indicated by the paging or indicated by the RAR, or it is determined that the period of the PRACH resource is changed from the second period to the first period or the period of the SSB burst is changed from the second period to the first period.

[0103] The twenty-first aspect is a communication device of the present application, comprising:

[0104] The determining unit is configured to determine that the second type of PRACH resource is valid after a (m+d)th millisecond, time slot or symbol, or determine that a period of the PRACH resource is changed from a first period to a second period after the (m+d)th millisecond, time slot or symbol, m being a positive integer and d being an integer greater than or equal to 0, if the uplink wake-up signal is sent on the mth millisecond, time slot or symbol.

[0105] It can be seen that, since the second type of PRACH resource is determined to be valid after the (m+d)th millisecond, time slot or symbol, or the period of the PRACH resource is determined to be changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the terminal device can send the second type of PRACH or send the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from sending less PRACH to sending more PRACH, thereby achieving adaptive sending of the PRACH, and further achieving power saving through adaptive sending of the PRACH.

[0106] The twenty-second aspect is a communication device of the present application, comprising:

[0107] The determining unit is configured to determine that the second type of PRACH resource is valid after a (m+d)th millisecond, time slot or symbol, or determine that a period of the PRACH resource is changed from a first period to a second period after the (m+d)th millisecond, time slot or symbol, m being a positive integer and d being an integer greater than or equal to 0, if the uplink wake-up signal is received on the mth millisecond, time slot or symbol.

[0108] It can be seen that, since the second type of PRACH resource is determined to be valid after the (m+d)th millisecond, time slot or symbol, or the period of the PRACH resource is determined to be changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the network device can receive the second type of PRACH or receive the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from receiving less PRACH to receiving more PRACH, thereby achieving adaptive receiving of the PRACH, and further achieving power saving through adaptive receiving of the PRACH.

[0109] The twenty-third aspect is a communication device of the present application, comprising:

[0110] The determining unit is configured to determine that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or determine that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m being a positive integer and d being an integer greater than or equal to 0.

[0111] It can be seen that, since the second type of PRACH resource is determined to be valid after the (m+d)th millisecond, time slot or symbol, or the period of the PRACH resource is determined to be changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the terminal device can send the second type of PRACH or send the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from sending less PRACH to sending more PRACH, thereby achieving adaptive sending of the PRACH, and further achieving power saving through adaptive sending of the PRACH.

[0112] The twenty-fourth aspect is a communication device of the present application, comprising:

[0113] The determining unit is configured to determine that the PRACH resource indication information in the PEI is a valid value, and send the PEI; if the sending of the PEI is completed at the mth millisecond, time slot or symbol, determine that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or determine that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m being a positive integer and d being an integer greater than or equal to 0.

[0114] It can be seen that, since the second type of PRACH resource is determined to be valid after the (m+d)th millisecond, time slot or symbol, or the period of the PRACH resource is determined to be changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the network device can receive the second type of PRACH or receive the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from receiving less PRACH to receiving more PRACH, thereby achieving adaptive receiving of the PRACH, and further achieving power saving through adaptive receiving of the PRACH.

[0115] The twenty-fifth aspect is a communication device of the present application, comprising:

[0116] The determining unit is configured to determine that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol, or determine that the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m being a positive integer and d being an integer greater than or equal to 0, if the PEI is received at the mth millisecond, time slot or symbol and the SSB burst indication information in the PEI is a valid value.

[0117] It can be seen that, since the second type of SSB burst is determined to be valid after the (m+d)th millisecond, time slot or symbol, or the period of the SSB burst is determined to be changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the terminal device can receive the second type of SSB or receive the SSB according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally receiving less SSB to receiving more SSB, thereby realizing adaptive reception of the SSB. In addition, since the (m+d)th millisecond, time slot or symbol is more likely to be before the paging frame (PF) or paging occasion (PO) associated with the PEI, the terminal device can receive the second type of SSB burst or the SSB burst of the second period before the PF / PO, so that the terminal device can reach the downlink time-frequency synchronization as soon as possible and start receiving paging as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0118] A twenty-sixth aspect is a communication apparatus, comprising:

[0119] The determining unit is configured to determine that the SSB burst indication information in the PEI is a valid value, and send the PEI. If the PEI is sent at the mth millisecond, time slot or symbol, the second type of SSB burst is determined to be valid after the (m+d)th millisecond, time slot or symbol, or the period of the SSB burst is determined to be changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m being a positive integer and d being an integer greater than or equal to 0.

[0120] It can be seen that since the second type of SSB burst is determined to be valid after the (m+d)th millisecond, time slot or symbol or the period of the SSB burst is determined to be changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the network device can send the second type of SSB or send the SSB according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally sending less SSB to sending more SSB, thereby realizing adaptive sending of the SSB. In addition, since the (m+d)th millisecond, time slot or symbol is more likely to be before the PF or PO associated with the PEI, the network device can send the second type of SSB burst or the SSB burst of the second period before the PF / PO, so that the network device can quickly perform downlink time-frequency synchronization with the terminal device and quickly start sending paging.

[0121] A twenty-seventh aspect is a communication apparatus of the present application, comprising:

[0122] The determining unit is configured to determine that the second type of SSB burst is valid after the first start frame or determine that the period of the SSB burst is changed from the first period to the second period after the first start frame if the SSB burst indication information in the PEI is the valid value.

[0123] It can be seen that since the period of the SSB burst is determined to be changed from the first period to the second period after the first start frame, the terminal device can receive the second type of SSB or receive the SSB according to the second period after the first start frame, so as to change from originally receiving less SSB to receiving more SSB, thereby realizing adaptive receiving of the SSB. In addition, since the first start frame is a start frame in a paging cycle in which the PF associated with the PEI is located, the terminal device can quickly achieve downlink time-frequency synchronization and quickly start receiving paging through the second type of SSB burst or the SSB burst of the second period.

[0124] A twenty-eighth aspect is a communication apparatus of the present application, comprising:

[0125] The determining unit is configured to determine that the SSB burst indication information in the PEI is the valid value and send the PEI, and determine that the second type of SSB burst is valid after the first start frame or determine that the period of the SSB burst is changed from the first period to the second period after the first start frame if the sending of the PEI is completed.

[0126] It can be seen that, since the period of the SSB burst is changed from the first period to the second period after the first starting frame, the network device can send the second type of SSB or receive the SSB according to the second period after the first starting frame, so as to change from originally sending less SSBs to sending more SSBs, thereby realizing adaptive sending of SSBs. In addition, since the first starting frame is a starting frame in a paging period in which the PF associated with the PEI is located, the network device can perform downlink time-frequency synchronization with the terminal device as soon as possible and start sending paging as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0127] A twenty-ninth aspect is a communication apparatus, comprising:

[0128] The determining unit is configured to determine that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or determine that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, if the paging is received at the mth millisecond, time slot or symbol, and the PRACH resource indication information in the paging is a valid value, m is a positive integer, and d is an integer greater than or equal to 0.

[0129] It can be seen that, since the period of the SSB burst is changed from the first period to the second period after the first starting frame, the network device can send the second type of SSB or receive the SSB according to the second period after the first starting frame, so as to change from originally sending less SSBs to sending more SSBs, thereby realizing adaptive sending of SSBs. In addition, since the first starting frame is a starting frame in a paging period in which the PF associated with the PEI is located, the network device can perform downlink time-frequency synchronization with the terminal device as soon as possible and start sending paging as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0130] A thirtieth aspect is a communication apparatus, comprising:

[0131] The determining unit is configured to determine that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or determine that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, if the paging is received at the mth millisecond, time slot or symbol, and the PRACH resource indication information in the paging is a valid value, m is a positive integer, and d is an integer greater than or equal to 0.

[0132] It can be seen that, since the second type of PRACH resource is determined to be valid after the (m+d)th millisecond, time slot or symbol or the period of the PRACH resource is determined to change from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the network device can receive the second type of PRACH or receive the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally receiving less PRACH to receiving more PRACH, thereby achieving adaptive reception of the PRACH.

[0133] A thirty-first aspect is a communication apparatus, including:

[0134] The determining unit is configured to determine that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol or determine that the period of the SSB burst changes from the first period to the second period after the (m+d)th millisecond, time slot or symbol, if the SSB burst indication information in the paging is a valid value and the paging is received at the mth millisecond, time slot or symbol, where m is a positive integer and d is an integer greater than or equal to 0.

[0135] It can be seen that, since the second type of SSB burst is determined to be valid after the (m+d)th millisecond, time slot or symbol or the period of the SSB burst is determined to change from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the terminal device can receive the second type of SSB or receive the SSB according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally receiving less SSB to receiving more SSB, thereby achieving adaptive reception of the SSB. In addition, since the (m+d)th millisecond, time slot or symbol is more likely to be before the time domain position of the PRACH resource, the terminal device can receive the second type of SSB burst or the SSB burst of the second period before the time domain position of the PRACH resource, so that the terminal device can reach downlink time-frequency synchronization as soon as possible and start sending the PRACH as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0136] A thirty-second aspect is a communication apparatus, including:

[0137] The determining unit is configured to determine that the SSB burst indication information in the paging is a valid value and send the paging, and determine that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol or determine that the period of the SSB burst changes from the first period to the second period after the (m+d)th millisecond, time slot or symbol, if the paging is sent at the mth millisecond, time slot or symbol, where m is a positive integer and d is an integer greater than or equal to 0.

[0138] It can be seen that since the second type of SSB burst is determined to be valid after the (m+d)th millisecond, time slot or symbol or the period of the SSB burst is determined to be changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the network device can send the second type of SSB or send the SSB according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally sending less SSB to sending more SSB, thereby realizing adaptive sending of the SSB. In addition, since the (m+d)th millisecond, time slot or symbol is more likely to be before the time domain location of the PRACH resource, the network device can send the second type of SSB burst or the SSB burst of the second period before the time domain location of the PRACH resource, so that the network device can perform downlink time-frequency synchronization with the terminal device as soon as possible and start receiving the PRACH as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0139] The third aspect of the present application is a communication device, comprising:

[0140] The determining unit is configured to determine that the second type of SSB burst is valid after the second starting frame or determine that the period of the SSB burst is changed from the first period to the second period after the second starting frame if the SSB burst indication information in the paging is the valid value and the paging is received.

[0141] It can be seen that since the period of the SSB burst is determined to be changed from the first period to the second period after the second starting frame, the terminal device can receive the second type of SSB or receive the SSB according to the second period after the second starting frame, so as to change from originally receiving less SSB to receiving more SSB, thereby realizing adaptive receiving of the SSB. In addition, since the second starting frame is the starting frame in the paging cycle in which the paging associated PF is located, the terminal device can reach downlink time-frequency synchronization as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0142] The third aspect of the present application is a communication device, comprising:

[0143] The determining unit is configured to determine that the SSB burst indication information in the paging is the valid value and send the paging, and determine that the second type of SSB burst is valid after the second starting frame or determine that the period of the SSB burst is changed from the first period to the second period after the second starting frame if the paging is sent.

[0144] It can be seen that since the period of the SSB burst is determined to change from the first period to the second period after the first starting frame, the network device can send the second type of SSB or receive the SSB according to the second period after the first starting frame, so as to change from originally sending fewer SSBs to sending more SSBs, thereby realizing adaptive sending of the SSB. In addition, since the second starting frame is a starting frame in the paging period in which the PF of the paging is located, the network device can perform downlink time-frequency synchronization with the terminal device as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0145] A thirty-fifth aspect is a communication apparatus of the present application, comprising:

[0146] The determining unit is configured to determine that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol, or determine that the period of the SSB burst changes from the first period to the second period after the (m+d)th millisecond, time slot or symbol, if the terminal device receives the RAR on the mth millisecond, time slot or symbol, and the SSB burst indication information in the RAR is a valid value, where m is a positive integer, and d is an integer greater than or equal to 0.

[0147] It can be seen that since the period of the SSB burst is determined to change from the first period to the second period after the first starting frame, the network device can send the second type of SSB or receive the SSB according to the second period after the first starting frame, so as to change from originally sending fewer SSBs to sending more SSBs, thereby realizing adaptive sending of the SSB. In addition, since the second starting frame is a starting frame in the paging period in which the PF of the paging is located, the network device can perform downlink time-frequency synchronization with the terminal device as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0148] A thirty-sixth aspect is a communication apparatus of the present application, comprising:

[0149] The determining unit is configured to determine that the SSB burst indication information in the RAR is a valid value, and transmit the RAR; and if the RAR is transmitted on the mth millisecond, time slot or symbol, determine that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol, or determine that the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, where m is a positive integer, and d is an integer greater than or equal to 0.

[0150] It can be seen that, since the second type of SSB burst is determined to be valid after the (m+d)th millisecond, time slot or symbol, or the period of the SSB burst is determined to be changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the network device can transmit the second type of SSB or transmit the SSB according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from transmitting fewer SSBs to transmitting more SSBs, thereby achieving adaptive transmission of SSBs. In addition, since the (m+d)th millisecond, time slot or symbol is before the Msg4 or the Msg3, the network device can transmit the second type of SSB burst or the SSB burst of the second period before the Msg4 or the Msg3, so that the network device can perform downlink time-frequency synchronization with the terminal device as soon as possible and start transmitting the Msg4 or start receiving the Msg3 as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0151] The thirty-seventh aspect is a communication device of the present application, comprising:

[0152] The determining unit is configured to receive indication information, where the indication information indicates whether the PRACH resource indication information is or is not a valid value and whether the SSB burst indication information is or is not a valid value.

[0153] The thirty-eighth aspect is a communication device of the present application, comprising:

[0154] The determining unit is configured to transmit indication information, where the indication information indicates whether the PRACH resource indication information is or is not a valid value and whether the SSB burst indication information is or is not a valid value.

[0155] In this way, the indication information indicates whether the PRACH resource indication information and the SSB burst indication information are or are not valid values.

[0156] The thirty-ninth aspect is a communication device of the present application, comprising:

[0157] determine to terminate the second type of PRACH resource or the second type of SSB burst, or determine that the period of the PRACH resource is changed from the second period to the first period or the period of the SSB burst is changed from the second period to the first period.

[0158] In this way, after the terminal device receives the Msg4, the terminal device can use the RRC configuration in the Msg4 to set the properties of the second type of PRACH resource or the period update of the PRACH resource, and / or after the terminal device receives the Msg4, the terminal device can use the RRC configuration in the Msg4 to set the properties of the second type of SSB burst or the period update of the SSB burst, so as to terminate or give up the second type of PRACH resource or the second type of SSB burst triggered by the UL WUS, indicated by the PEI, indicated by the paging or indicated by the RAR, or determine that the period of the PRACH resource is changed from the second period to the first period or the period of the SSB burst is changed from the second period to the first period.

[0159] The fourth aspect is a communication device, comprising:

[0160] determine to terminate the second type of PRACH resource or the second type of SSB burst, or determine that the period of the PRACH resource is changed from the second period to the first period or the period of the SSB burst is changed from the second period to the first period.

[0161] In this way, after the network device sends the Msg4, the network device can use the RRC configuration in the Msg4 to set the properties of the second type of PRACH resource or the period update of the PRACH resource, and / or after the network device sends the Msg4, the network device can use the RRC configuration in the Msg4 to set the properties of the second type of SSB burst or the period update of the SSB burst, so as to terminate or give up the second type of PRACH resource or the second type of SSB burst triggered by the UL WUS, indicated by the PEI, indicated by the paging or indicated by the RAR, or determine that the period of the PRACH resource is changed from the second period to the first period or the period of the SSB burst is changed from the second period to the first period.

[0162] The fourth aspect is a communication device, comprising:

[0163] The fourth aspect is a communication device, comprising:

[0164] In a forty-third aspect, a terminal device is provided. The terminal device includes a processor, a memory, and a computer program or instructions stored in the memory. The processor executes the computer program or instructions to implement the steps of the method of any one of the above aspects.

[0165] In a forty-fourth aspect, a network device is provided. The network device includes a processor, a memory, and a computer program or instructions stored in the memory. The processor executes the computer program or instructions to implement the steps of the method of any one of the above aspects.

[0166] In a forty-fifth aspect, a chip is provided. The chip includes a processor and a communication interface. The processor executes the steps of the method of any one of the above aspects.

[0167] In a forty-sixth aspect, a chip module is provided. The chip module includes a transceiver assembly and a chip. The chip includes a processor. The processor executes the steps of the method of any one of the above aspects.

[0168] In a forty-seventh aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores a computer program or instructions. The computer program or instructions, when executed, implement the steps of the method of any one of the above aspects. For example, the computer program or instructions are executed by a processor.

[0169] In a forty-eighth aspect, a computer program product is provided. The computer program product includes a computer program or instructions. The computer program or instructions, when executed, implement the steps of the method of any one of the above aspects. For example, the computer program or instructions are executed by a processor. BRIEF DESCRIPTION OF DRAWINGS

[0170] FIG. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present application;

[0171] FIG. 2 is a schematic diagram of an architecture of another communication system according to an embodiment of the present application;

[0172] FIGS. 3-21 are schematic diagrams of a flow of a communication method according to an embodiment of the present application;

[0173] FIG. 22 is a block diagram of functional units of a communication apparatus according to an embodiment of the present application;

[0174] FIG. 23 is a block diagram of functional units of another communication apparatus according to an embodiment of the present application;

[0175] FIG. 24 is a schematic diagram of a structure of a terminal device according to an embodiment of the present application;

[0176] FIG. 25 is a schematic diagram of a structure of a network device according to an embodiment of the present application. DETAILED DESCRIPTION

[0177] It should be understood that the terms "first", "second" and the like in the embodiments of the application are used to distinguish different objects, and are not used to describe a particular order. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, software, product or device including a series of steps or units is not limited to the steps or units listed, but also includes steps or units not listed, or further includes other steps or units inherent to these processes, methods, products or devices.

[0178] "Embodiments" referred to in the embodiments of the application mean that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the application. The appearance of this phrase at various places in the specification does not necessarily mean the same embodiment, nor is it independent or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0179] "and / or" in the embodiments of the application describes the association relationship of the associated objects, which means that there can be three relationships. For example, A and / or B can represent the following three cases: A exists alone; A and B exist simultaneously; B exists alone. Wherein, A, B can be singular or plural. The symbol " / " can represent that the associated objects before and after are in an "or" relationship.

[0180] "at least one" or similar expressions in the embodiments of the application means any combination of the items, including any combination of single or multiple items, means one or more, and multiple means two or more. For example, at least one of a, b or c can represent the following seven cases: a, b, c, a and b, a and c, b and c, a, b and c. Wherein, each of a, b, c can be an element or a set containing one or more elements.

[0181] "equal to" in the embodiments of the application can be used with greater than, which is applicable to the technical solutions adopted when greater than; or can be used with less than, which is applicable to the technical solutions adopted when less than. When equal to is used with greater than, it is not used with less than; when equal to is used with less than, it is not used with greater than.

[0182] "of", "corresponding / relevant", "corresponding", "indicated" in the embodiments of the application can be used interchangeably. It should be pointed out that when the distinction is not emphasized, the meanings expressed are consistent.

[0183] The "connection" in the embodiments of the present application refers to various connection modes such as direct connection or indirect connection to realize communication between devices, and no limitation is made on this.

[0184] The "network" in the embodiments of the present application can be expressed as the same concept as "system", and the communication system is the communication network.

[0185] The related content, concepts, meanings, technical problems, technical solutions and beneficial effects involved in the embodiments of the present application are described below.

[0186] The communication system of the present embodiment is specifically described below.

[0187]

Communication system

[0188] The technical solutions of the embodiments of the present application can be applied to various wireless communication systems, for example: long term evolution (LTE) system, advanced long term evolution (LTE-A) system, New Radio (NR) system, evolved system of NR system, LTE-based access to unlicensed spectrum (LTE-U) system, NR-based access to unlicensed spectrum (NR-U) system, non-terrestrial network (NTN) system, universal mobile telecommunication system (UMTS), 6th-Generation (6G) communication system or other communication systems in the future, etc.

[0189] It should be noted that the number of user connections supported by the conventional communication system is limited and easy to implement. With the development of communication technology, the communication system of the present application can not only support the conventional communication system, but also support device to device (D2D) communication, machine to machine (M2M) communication, machine type communication (MTC), vehicle to vehicle (V2V) communication, vehicle to everything (V2X) communication, narrow band internet of things (NB-IoT) communication, etc. Therefore, the technical solutions of the embodiments of the present application can be applied to the above communication systems.

[0190] For example, the embodiments of the present application can be applied to the scenarios of beamforming, carrier aggregation (CA), dual connectivity (DC) or standalone (SA) deployment, etc.

[0191] For another example, the embodiments of the present application can be applied to the communication scenarios of unlicensed spectrum. In the embodiments of the present application, the unlicensed spectrum can be considered as a shared spectrum. Alternatively, the embodiments of the present application can be applied to licensed spectrum. In this case, the licensed spectrum can be considered as a non-shared spectrum.

[0192] For example, the network architecture of a communication system of the embodiments of the present application can refer to FIG. 1. As shown in FIG. 1, the communication system 10 can include a network device 110 and a terminal device 120. The terminal device 120 can communicate with the network device 110 in a wireless manner.

[0193] Of course, FIG. 1 is only an example of the network architecture of a communication system, and does not limit the network architecture of the communication system of the embodiments of the present application. For example, the communication system 10 can further include a server or other devices, or the communication system 10 can include other network devices in addition to the network device 110, or the communication system 10 can include other terminal devices in addition to the terminal device 120.

[0194] The terminal device and the network device mentioned in the embodiments will be described below.

[0195] The terminal device and the network device mentioned in the embodiments will be described below.

[0196]

Terminal device

[0197] The terminal device can be a device with transceiving function, also known as terminal, user equipment (UE), remote terminal device (remote UE), relay device (relay UE), access terminal device, user unit, user station, mobile station, mobile station, remote station, mobile device, user terminal device, smart terminal device, wireless communication device, user agent or user equipment. It should be noted that the relay device is a terminal device that can provide relay forwarding services for other terminal devices (including remote terminal devices).

[0198] For example, the terminal device can be a mobile phone, a tablet computer (Pad), a computer with wireless transceiving function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in unmanned automatic driving, a wireless terminal device in remote medical treatment, a wireless terminal device in smart grid, a wireless terminal device in transportation safety, a wireless terminal device in smart city or a wireless terminal device in smart home, etc.

[0199] For another example, the terminal device can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a next-generation communication system (such as an NR communication system or a 6G communication system), or a terminal device in a future evolved public land mobile network (PLMN), etc., without specific limitation.

[0200] In some possible examples, the terminal device can be deployed on land, including indoors or outdoors, handheld, wearable, or vehicle-mounted; can be deployed on water (such as ships, etc.); can be deployed in the air (such as airplanes, balloons, and satellites, etc.). The terminal device can include a device with a wireless communication function, such as a chip system, a chip, or a chip module. For example, the chip system can include a chip and can also include other discrete devices. The terminal device can be a chip, a chip module, a device, a unit, etc., and is not specifically limited.

[0201] [Network device]

[0202] The network device can be a device with a transceiver function, which can be used to communicate with the terminal device.

[0203] The network device can include a device with a wireless communication function for the terminal device, such as a chip system, a chip, or a chip module. For example, the chip system can include a chip or other discrete devices. The network device serves a cell, and the terminal device in the cell can communicate with the network device through a transmission resource (such as a spectrum resource). The cell can be a macro cell, a small cell, a metro cell, a micro cell, a pico cell, a femto cell, etc.

[0204] In some possible examples, the network device has a mobile feature, for example, the network device can be a mobile device. Alternatively, the network device can be a satellite, a balloon station. For example, the satellite can be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc. Alternatively, the network device can also be a base station arranged on land, water, etc.

[0205] In some possible examples, the network device can include an access network device and / or a device in a core network (CN).

[0206] The access network device and the core network device are described below.

[0207] [Access network device]

[0208] In some possible examples, the access network device can be a radio access network (RAN) node in a RAN. Wherein, the RAN can be composed of multiple RAN nodes (e.g., 5G-RAN nodes) implementing radio physical layer functions, resource scheduling and radio resource management, radio access control, and mobility management functions.

[0209] In some possible examples, the access network device can be connected with a user plane interface N3 and a UPF for transmitting data of the terminal device; the access network device can be connected with a control plane interface N2 and a mobility management function (AMF) to establish a control plane signaling connection for implementing radio access bearer control and the like.

[0210] In some possible examples, the access network device can include, but is not limited to, a 5G node base (gNB), an evolutional node base (eNB), a wireless access point (WiFi AP), a world interoperability for microwave access base station (WiMAX BS), a transmission receiving point (TRP), a wireless relay node, a wireless backhaul node, a master node (MN) in a dual connectivity architecture, a second node or a secondary node (SN) in a dual connectivity architecture, and the like.

[0211] In some possible examples, the access network device can refer to a device used for communication with the terminal device. For example, the access network device can be a base transceiver station (BTS) in a global system of mobile communication (GSM) system or a code division multiple access (CDMA) system, can be a base station (nodeB, NB) in a wideband code division multiple access (WCDMA) system, can be an evolved node base station (eNB) in an LTE system, can be a radio controller in a cloud radio access network (CRAN) scenario, or can be a relay station, an access point, a vehicle-mounted device, a wearable device, and an access network device in a future 5G network or an access network device in a future evolved PLMN network, and the like. Embodiments of the present application are not limited.

[0212] In some possible examples, the functions of the access network device are divided into two parts, referred to as centralized unit (CU)-distributed unit (DU) separation. From the perspective of the protocol stack, the CU includes the radio resource control (RRC) layer and the packet data convergence protocol (PDCP) layer of the LTE base station, and the DU includes the radio link control (RLC) layer, the media access control (MAC) layer, and the physical (PHY) layer of the LTE base station. In a common 5G base station deployment, the CU and the DU can be connected by an optical fiber in a physical manner, and a specially defined F1 interface exists logically between the CU and the DU for communication between the CU and the DU. From the perspective of functions, the CU is mainly responsible for radio resource control and configuration, cross-cell mobility management, bearer management, and the like. The DU is mainly responsible for scheduling, physical signal generation, and transmission.

[0213] In some possible examples, the access network device can be a macro base station, a micro base station, a pico base station, a small station, a relay station, a balloon station, and the like.

[0214]

Core network device

[0215] The core network device can include network elements providing various functions. Among them, the "network element" can be referred to as an entity, device, apparatus or module, etc., and no specific limitation is made. In addition, in order to facilitate understanding and description, the description of "network element" is omitted in part of the description, for example, the network function exposure function (network exposure function, NEF) network element is simply referred to as NEF, in this case, the "NEF" should be understood as the NEF network element or the NEF entity, and hereinafter, the description of the same or similar cases is omitted.

[0216] For example, the core network device can include a mobility management entity (mobility management entity, MME), a broadcast multicast service center (broadcast multicast service center, BMSC), etc., or can include corresponding functional entities in a 5G system, such as a core network control plane (control plane, CP) or user plane (user plan, UP) network function, etc., the core network control plane can be understood as a core network control plane function (control plane function, CPF) entity.

[0217] The following describes various network elements included in the core network device.

[0218] The session management function (session management function, SMF) can be responsible for the control plane function of the session management of the terminal device, including the selection and control of the user plane function (user plane function, UPF), the internet protocol (internet protocol, IP) address allocation, the QoS management of the session, the acquisition of the policy and charging control (policy and charging control, PCC) policy, etc.

[0219] The user plane function (user plane function, UPF) can be an anchor point for a protocol data unit (protocol data unit, PDU) session connection, responsible for filtering, data transmission / forwarding, rate control, generating charging information, etc. for the data packet of the terminal device, and providing connection with the data network (data network, DN).

[0220] The policy control function (policy control function, PCF) can provide configuration policy information for the terminal device, and provide policy information for controlling the terminal device for the control plane network element (such as SMF) of the network; generate terminal device access policy and QoS flow control policy.

[0221] The AF can interact with the network element of the core network to provide some services. For example, the AF interacts with the PCF to perform traffic policy control, interacts with the NEF to obtain some network capability information or provide some application information to the network, and provides some data network access point information to the PCF to generate corresponding data traffic routing information.

[0222] The NEF can be responsible for providing network-related state information to application services.

[0223] The authentication server function (AUSF) can implement 3GPP and non-3GPP access authentication.

[0224] The unified data management (UDM) can implement unified data management functions. For example, 3GPP AKA authentication, user identification, access authorization, registration, mobility, subscription, short message management, etc.

[0225] The network slice selection function (NSSF) can determine the network slice instance that the terminal device is allowed to access according to the slice selection assistance information, subscription information, etc. of the terminal device.

[0226] The network repository function (NRF) can be a new function that provides registration and discovery functions, and can enable network functions (NFs) to discover each other and communicate through API interfaces.

[0227] The unified data management (UDM) can be responsible for user identification, subscription data, authentication data management, and user service network element registration management.

[0228] The unified data repository (UDR) can be used for UDM to store or read subscription data, and for PCF to store or read policy data.

[0229] The network data analytics function (NWDAF) can provide network analysis services according to the request data of network services.

[0230] A network slice specific authentication and authorization function (NSSAAF) can be used to provide authentication and authorization for a specific network slice.

[0231] It should be noted that the terminal device is connected to the access network device in a wireless manner, and the access network device is connected to the core network device in a wireless or wired manner. The access network device and the core network device can be independent and different physical devices, or can be integrated into the same physical device with the functions of the core network device and the logical functions of the access network device, or can be a physical device integrated with part of the functions of the core network device and part of the functions of the access network device.

[0232] For example, FIG. 2 is a schematic diagram of the architecture of another communication system according to an embodiment of the present application. In FIG. 2, the names of the network elements included in FIG. 2 are only names, and the names do not limit the functions of the network elements. In 5G networks and future other networks, the above-mentioned network elements can also be other names, which are not limited. For example, in a 6G network, part or all of the above-mentioned network elements can use the terms in 5G, or other names, etc. This is uniformly described below, and will not be described again.

[0233] In addition, the network elements in FIG. 2 are not necessarily present at the same time, and the network elements required can be determined according to the needs. The connection relationship between the network elements in FIG. 2 is not unique, and can be adjusted according to the needs. It can be understood that the above-mentioned network elements or functions can be network elements in a hardware device, or software functions running on a dedicated hardware, or virtualized functions instantiated on a platform (for example, a cloud platform).

[0234] Of course, FIG. 2 is only an example of the network architecture of a communication system, and does not limit the network architecture of the communication system according to an embodiment of the present application.

[0235]

Enhancement of communication process

[0236] Network energy savings (network power saving) is a problem that operators and device manufacturers are concerned about, and network energy savings is very beneficial to reducing operating costs and environmental protection.

[0237] Generally, when the network load is zero or low, the process of sending the common downlink signals / channels by the network device accounts for a large proportion of the energy consumption of the network device. The common downlink signals / channels can include a synchronization signal block (SSB), a system information block 1 (SIB1), a system information block x (SIBx), paging, a random access response (RAR), and the like. The SIB1 is also referred to as remaining main system information (RMSI), and the SIBx is also referred to as other system information (OSI). Optionally, the SSB, the SIB1, the OSI, and the paging are periodically sent by the network device.

[0238] It is worth noting that the paging mentioned in the embodiment can be one of paging a physical downlink control channel (PDCCH), paging downlink control information (DCI), paging a physical downlink shared channel (PDSCH), or paging a message.

[0239] When the network device needs to address the terminal device (such as a service of the terminal device), the network device can need to send a paging to the terminal device. The paging has a certain sending probability, such as a 10% probability of sending the paging by the network device.

[0240] For the terminal device in an idle state or an inactive state, the SSB can be used for initial cell selection, radio resource management (RRM) measurement, and time-frequency synchronization. The RRM measurement can include RRM measurement of a serving cell or RRM measurement of a neighboring cell.

[0241] The time-frequency synchronization mainly occurs before the terminal device receives a paging, a RAR, or a message 4 (Msg4), and the like, so as to achieve a certain time-frequency synchronization to correctly receive the paging, the RAR, or the Msg4, and the like. Alternatively, the time-frequency synchronization mainly occurs before the terminal device transmits a message 3 (Msg3), and the like, so as to achieve a certain time-frequency synchronization to correctly transmit the Msg3, and the like.

[0242] Generally, the PRACH is transmitted after the paging, the RAR is transmitted after the PRACH, the Msg3 is transmitted after the RAR, and the Msg4 is transmitted after the Msg3. Therefore, for the terminal device, before the terminal device receives the paging, the RAR, or the Msg4, the terminal device can need to process more SSBs. Correspondingly, for the network device, before the network device transmits the paging, the RAR, or the Msg4, the network device can need to transmit more SSBs to assist the terminal device in time-frequency synchronization, and the network device can only need to transmit less SSBs except for the above cases (such as initial cell selection, in-cell RRM measurement, and neighbor cell measurement) to save the power consumption of the network device.

[0243] For the terminal device, before the terminal device transmits the Msg3, the terminal device can need to process more SSBs. Correspondingly, for the network device, before the network device receives the Msg3, the network device can need to transmit more SSBs to assist the terminal device in time-frequency synchronization, and the network device can only need to transmit less SSBs except for the above cases (such as initial cell selection, in-cell RRM measurement, and neighbor cell measurement) to save the power consumption of the network device.

[0244] Generally, when the network load is zero or low, the process of the network device receiving a common uplink signal / channel occupies a large proportion of the power consumption of the network device. The common uplink signal / channel can include a physical random access channel (PRACH) or a Msg3, and the like. Optionally, the PRACH is periodically received by the network device.

[0245] After the terminal device has uplink data or after the network device pages the terminal device, if the terminal device needs to access the network (random access), the terminal device can need to send a PRACH to the network device. Therefore, for the terminal device in the idle state or the inactive state, after the terminal device has uplink data or the terminal device receives a page, the terminal device can need to send a PRACH. Correspondingly, for the network device, after the terminal device has uplink data or the network device sends a page, the network device can need to receive more PRACHs to facilitate the terminal device to access the network, and in addition to the above-mentioned cases, the network device can only need to receive fewer PRACHs to save the power consumption of the network device.

[0246] In summary, for the scenario in which the terminal device needs to perform time-frequency synchronization or the terminal device needs to access the network, the embodiment can specifically consider the following two cases:

[0247] One case is:

[0248] For the terminal device, in some cases, for example, before the terminal device receives a page, a RAR, or a Msg4 or before the terminal device sends a Msg3, the terminal device can need to receive more SSBs. For the network device, in some cases, for example, before the network device sends a page, a RAR, or a Msg4 or before the network device receives a Msg3, the network device can need to send more SSBs to enable the terminal device to perform time-frequency synchronization by means of the SSBs, and in addition to the above-mentioned cases, the network device can only need to send fewer SSBs to save the power consumption of the network device.

[0249] It can be seen that the embodiment considers that the network device can support adaptive sending of SSBs and the terminal device can support adaptive receiving of SSBs, thereby facilitating the saving of the power consumption of the network device and the terminal device.

[0250] It should be noted that the network device supporting adaptive sending of SSBs can be understood as that the network device sends more SSBs in a period of time and sends fewer SSBs in addition to the above-mentioned period of time, and the terminal device supporting adaptive receiving of SSBs can be understood as that the terminal device receives more SSBs in a period of time and receives fewer SSBs in addition to the above-mentioned period of time.

[0251] Another case is:

[0252] For the terminal device, in some cases, for example, after the terminal device has uplink traffic or the terminal device receives a paging, the terminal device can need to send a PRACH. For the network device, in some cases, for example, after the terminal device has uplink traffic or the network device sends a paging, the network device can need to receive more PRACHs, so as to realize terminal device access to the network through the PRACH. In addition to the above cases, the network device can only need to receive fewer PRACHs, so as to save power consumption of the network device.

[0253] It can be seen that the embodiment considers that the network device can support adaptive reception of the PRACH, and the terminal device can support adaptive sending of the PRACH, so as to save power consumption.

[0254] It should be noted that the network device supports adaptive reception of the PRACH, which can be understood as that the network device receives more PRACHs in a period of time, and receives fewer PRACHs in addition to the above time. The terminal device supports adaptive sending of the PRACH, which can be understood as that the terminal device sends more PRACHs in a period of time, and sends fewer PRACHs in addition to the above time.

[0255] The following embodiments of the present embodiment will be described in detail from different embodiments of the terminal device supporting adaptive sending of the PRACH, the network device supporting adaptive reception of the PRACH, the terminal device supporting adaptive reception of the SSB, and the network device supporting adaptive sending of the SSB.

Embodiment 1

[0256] In "Embodiment 1", the present embodiment can be described in detail by the request of the uplink wake-up signal (UL WUS) for the terminal device supporting adaptive sending of the PRACH and the network device supporting adaptive reception of the PRACH.

[0257] For the terminal device, taking the network device receiving the second type of PRACH or the network device receiving the PRACH according to the second period as an example, in one case, the terminal device originally sends the first type of PRACH or sends the PRACH according to the first period. Then, after the terminal device has uplink traffic, the terminal device sends the UL WUS to the network device. Finally, in one case, after the terminal device sends the UL WUS, the terminal device can send the second type of PRACH or send the PRACH according to the second period. In another case, after the terminal device sends the UL WUS, the terminal device starts to listen to the feedback information, and the feedback information indicates that the second type of PRACH or the PRACH according to the second period can be sent, wherein the feedback information can be in the random access response (RAR).

[0258] That is, the terminal device can determine that the first type of PRACH resource is valid or the period of the PRACH resource is the first period. In one case, after the terminal device transmits the UL WUS, the terminal device can determine that the second type of PRACH resource is valid or the period of the PRACH resource changes from the first period to the second period. In another case, after the terminal device transmits the UL WUS, the terminal device starts to monitor the feedback information, according to the feedback information, the terminal device can determine that the second type of PRACH resource is valid or the period of the PRACH resource changes from the first period to the second period, wherein the feedback information can be in the random access response (RAR).

[0259] It should be noted that the PRACH resource mentioned in the embodiment can be understood as a resource for transmitting / carrier PRACH. The PRACH resource can include a preamble (preamble), which is generally considered as a code domain resource. The PRACH resource can include a PRACH occasion (PRACH occasion, RO), and generally, the PRACH resource includes both time domain resources and frequency domain resources. The PRACH resource can be periodic, such as RO.

[0260] Therefore, the first type of PRACH resource can be understood as a resource for transmitting or carrying the first type of PRACH. The second type of PRACH resource can be understood as a resource for transmitting or carrying the second type of PRACH. The first type of PRACH resource can be periodic, and the second type of PRACH resource can be periodic.

[0261] When the terminal device determines that the first type of PRACH resource is valid, it means that the terminal device can send the first type of PRACH through the first type of PRACH resource. When the terminal device determines that the period of the PRACH resource is the first period, it means that the terminal device can send the PRACH through the PRACH resource according to the first period. When the terminal device determines that the second type of PRACH resource is valid, it means that the terminal device can send the second type of PRACH through the second type of PRACH resource. When the terminal device determines that the period of the PRACH resource is the second period, the terminal device can send the PRACH through the PRACH resource according to the second period.

[0262] In addition, the period of the first type of PRACH is greater than the period of the second type of PRACH. For example, the first type of PRACH is a long-period PRACH, and the second type of PRACH is a short-period PRACH. The period of the first type of PRACH resource is greater than the period of the second type of PRACH resource. For example, the first type of PRACH resource is a long-period PRACH resource, and the second type of PRACH resource is a short-period PRACH resource. In addition, the first period is greater than the second period. For example, the first period is a long period, and the second period is a short period. It should be noted that, generally, the terminal device transmits a long-period PRACH or transmits a PRACH according to a long period. Since it is a long period, the terminal device can transmit fewer PRACHs. Then, after the terminal device has uplink data, the terminal device can request the network device to receive a short-period PRACH or the network device to receive a PRACH according to a short period by transmitting a UL WUS. In this way, after the terminal device transmits the UL WUS, the terminal device transmits a short-period PRACH or transmits a PRACH according to a short period. Since it is a short period, the terminal device can transmit more PRACHs.

[0263] It can be seen that, after the terminal device transmits the UL WUS, the terminal device changes from originally transmitting the first type of PRACH to transmitting the second type of PRACH, or changes from originally transmitting the PRACH according to the first period to transmitting the PRACH according to the second period. Since the period of the first type of SSB is greater than the period of the second type of SSB, and the first period is greater than the second period, after the terminal device transmits the UL WUS, the terminal device can change from originally transmitting fewer PRACHs to transmitting more PRACHs, thereby realizing adaptive transmission of PRACH.

[0264] The following is an example of the terminal device transmitting a UL WUS at the mth millisecond, time slot, or symbol. As shown in FIG. 3, FIG. 3 is a flowchart of a communication method according to an embodiment of the present application, specifically including the following steps:

[0265] S310. If the terminal device transmits a UL WUS at the mth millisecond, time slot, or symbol, the terminal device determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot, or symbol, or the terminal device determines that the period of the PRACH resource changes from the first period to the second period after the (m+d)th millisecond, time slot, or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0266] In another case, after the terminal device sends the uplink wake-up signal, the terminal device starts to listen to the feedback information. If the terminal device receives the feedback information at the mth millisecond, time slot or symbol, the terminal device determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or the terminal device determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0267] It should be noted that before S310, the terminal device can determine that the first type of PRACH resource is valid or that the period of the PRACH resource is the first period.

[0268] In addition, in one case, after the UL WUS is sent at the mth millisecond, time slot or symbol, the terminal device can need a delay of d milliseconds, time slots or symbols to determine that the second type of PRACH resource is valid or that the period of the PRACH resource is the second period. When d is 0, it means that the terminal device determines that the second type of PRACH resource is valid or that the period of the PRACH resource is changed from the first period to the second period immediately after the mth millisecond, time slot or symbol. In another case, after the feedback information is received at the mth millisecond, time slot or symbol, the terminal device can need a delay of d milliseconds, time slots or symbols to determine that the second type of PRACH resource is valid or that the period of the PRACH resource is the second period. When d is 0, it means that the terminal device determines that the second type of PRACH resource is valid or that the period of the PRACH resource is changed from the first period to the second period immediately after the mth millisecond, time slot or symbol.

[0269] The terminal device determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol can mean that the terminal device determines that the period of the PRACH resource is changed from the first period to the second period starting from the nearest PRACH resource after the (m+d)th millisecond, time slot or symbol.

[0270] It should be noted that when the second type of PRACH resource is valid, it means that the terminal device can send the second type of PRACH through the second type of PRACH resource. When the period of the PRACH resource is the second period, it means that the terminal device can send the PRACH through the PRACH resource according to the second period

[0271] It can be seen that, due to the terminal device determining that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol or the terminal device determining that the period of the PRACH resource changes from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the terminal device can send the second type of PRACH or send the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally sending less PRACH to sending more PRACH, thereby realizing adaptive sending of the PRACH.

[0272] For the network device, taking the network device receiving the second type of PRACH or the network device receiving the PRACH according to the second period as an example, the network device originally receives the first type of PRACH or receives the PRACH according to the first period; then, after the network device determines that the terminal device has uplink data, the network device receives the UL WUS; finally, after the network device receives the UL WUS, the network device can receive the second type of PRACH or receive the PRACH according to the second period.

[0273] That is, the network device can determine that the first type of PRACH resource is valid or the period of the PRACH resource is the first period. After the network device receives the UL WUS, the network device can determine that the second type of PRACH resource is valid or the period of the PRACH resource changes from the first period to the second period.

[0274] It should be noted that, when the network device determines that the first type of PRACH resource is valid, it means that the network device can receive the first type of PRACH through the first type of PRACH resource. When the network device determines that the period of the PRACH resource is the first period, it means that the network device can receive the PRACH according to the first period through the PRACH resource. When the network device determines that the second type of PRACH resource is valid, it means that the network device can receive the second type of PRACH through the second type of PRACH resource. When the network device determines that the period of the PRACH resource is the second period, the network device can receive the PRACH according to the second period through the PRACH resource.

[0275] In addition, the period of the first type of PRACH is greater than the period of the second type of PRACH. For example, the first type of PRACH is a long-period PRACH, and the second type of PRACH is a short-period PRACH. The period of the first type of PRACH resource is greater than the period of the second type of PRACH resource. For example, the first type of PRACH resource is a long-period PRACH resource, and the second type of PRACH resource is a short-period PRACH resource. In addition, the first period is greater than the second period. For example, the first period is a long period, and the second period is a short period.

[0276] It should be noted that, generally, the network device receives the PRACH with a long period or the network device receives the PRACH according to the long period. Since it is a long period, the network device can receive fewer PRACHs. Then, after the terminal device has uplink data, the terminal device can request the network device to receive the PRACH with a short period or the network device to receive the PRACH according to the short period by sending the UL WUS. In this way, after the network device receives the UL WUS, the network device can receive the PRACH with a short period or receive the PRACH according to the short period. Since it is a short period, the network device can receive more PRACHs.

[0277] It can be seen that, after the network device receives the UL WUS, the network device changes from receiving the first type of PRACH to receiving the second type of PRACH, or the network device changes from receiving the PRACH according to the first period to receiving the PRACH according to the second period. Since the period of the first type of SSB is greater than the period of the second type of SSB, and the first period is greater than the second period, after the network device receives the UL WUS, the network device can change from receiving fewer PRACHs to receiving more PRACHs, thereby realizing adaptive reception of PRACH.

[0278] The following is an example of the network device receiving the UL WUS at the mth millisecond, time slot or symbol. As shown in FIG. 4, FIG. 4 is a flow diagram of another communication method according to an embodiment of the present application, which specifically includes the following steps:

[0279] S410. If the network device receives the UL WUS at the mth millisecond, time slot or symbol, the network device determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or the network device determines that the period of the PRACH resource changes from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0280] In another case, after the network device receives the uplink wake-up signal, it is ready to send feedback information. If the network device finishes sending the feedback information at the mth millisecond, time slot or symbol, the network device determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or the network device determines that the period of the PRACH resource changes from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0281] It should be noted that, before S410, the network device can determine that the first type of PRACH resource is valid or that the period of the PRACH resource is the first period.

[0282] In addition, after receiving the UL WUS at the mth millisecond, time slot or symbol, the network device can need a delay of d milliseconds, time slots or symbols to determine that the second type of PRACH resource is valid or that the period of the PRACH resource is the second period. When d is 0, this means that the network device determines that the second type of PRACH resource is valid or that the period of the PRACH resource changes from the first period to the second period after the mth millisecond, time slot or symbol. In another case, after receiving the UL WUS, the feedback information is prepared to be sent, and after sending the feedback information at the mth millisecond, time slot or symbol, the network device can need a delay of d milliseconds, time slots or symbols to determine that the second type of PRACH resource is valid or that the period of the PRACH resource is the second period. When d is 0, this means that the network device determines that the second type of PRACH resource is valid or that the period of the PRACH resource changes from the first period to the second period after the mth millisecond, time slot or symbol.

[0283] The network device determines that the period of the PRACH resource changes from the first period to the second period after the (m+d)th millisecond, time slot or symbol, which means that the network device determines that the period of the PRACH resource changes from the first period to the second period after the (m+d)th millisecond, time slot or symbol, starting from the most recent PRACH resource.

[0284] It is worth noting that when the second type of PRACH resource is valid, it means that the network device can receive the second type of PRACH through the second type of PRACH resource. When the period of the PRACH resource is the second period, it means that the network device can receive the PRACH through the PRACH resource according to the second period.

[0285] It can be seen that since the network device determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or the network device determines that the period of the PRACH resource changes from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the network device can receive the second type of PRACH or receive the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally receiving less PRACH to receiving more PRACH, thereby realizing adaptive reception of PRACH.

[0286] The following is an example of d in the above FIG. 3 and FIG. 4.

[0287] In some possible examples, d can be a preset value, or can be a value indicated by the network device from a plurality of preset values through signaling, or can be a value selected by the terminal device from a plurality of preset values according to its own capability. Among them, the terminal device's own capability has been informed to the network device through high layer signaling, and both parties can reach consistency.

[0288] The UL WUS in FIG. 3 and FIG. 4 is exemplarily described as follows.

[0289] In some possible examples, the UL WUS is one or more specific preambles in the first type of PRACH resource.

[0290] It should be noted that the first type of PRACH resource can be understood as a resource for transmitting the first type of PRACH. The period of the first type of PRACH resource is greater than the period of the second type of PRACH resource. For example, the first type of PRACH resource is a long-period PRACH resource, and the second type of PRACH resource is a short-period PRACH resource. In this way, since the UL WUS is one or more specific preambles in the first type of PRACH resource, the terminal device can send the UL WUS through the first type of PRACH resource.

[0291] In some possible examples, the UL WUS is one or more specific preambles in the PRACH resource with the first period.

[0292] It should be noted that the PRACH resource with the first period can be understood as a PRACH resource with a period of the first period, for example, a PRACH resource with a period of a long period. In this way, since the UL WUS is one or more specific preambles in the PRACH resource with the first period, the terminal device can send the UL WUS through the PRACH resource with the first period.

[0293]

Embodiment 2

[0294] In the “embodiment 2”, the embodiment can specifically describe the terminal device supporting the adaptive sending of the PRACH, the network device supporting the adaptive receiving of the PRACH, the terminal device supporting the adaptive receiving of the SSB, and the network device supporting the adaptive sending of the PRACH from different situations through the paging early indication (PEI).

[0295] Generally, the PEI is carried by a PEI PDCCH or a PEI DCI, such as a PDCCH corresponding to a Type2A-PDCCH or a Type2A-PDCCH common search space (CSS set) or a DCI format 2_7, or the PEI is carried by a PEI DCI, such as a DCI format 2_7.

[0296]

Situation One

[0297] In the "case one", through the PEI, after the terminal device receives the paging, the terminal device can send more PRACHs, so as to realize that the terminal device supports adaptive sending of PRACHs. Correspondingly, through the PEI, after the network device sends the paging, the network device can receive more PRACHs, so as to realize that the network device supports adaptive receiving of PRACHs.

[0298] The following is specifically described from the terminal device and the network device respectively.

[0299] For the terminal device, taking the example that the PEI indicates the terminal device to send the second type of PRACH or to send the PRACH according to the second period, the terminal device originally sends the first type of PRACH or sends the PRACH according to the first period; then, after the terminal device receives the PEI, the terminal device can send the second type of PRACH or send the PRACH according to the second period after the terminal device receives the paging.

[0300] That is, the terminal device can determine that the first type of PRACH resource is valid or the period of the PRACH resource is the first period. After the terminal device receives the PEI, the terminal device can determine that the second type of PRACH resource is valid or the period of the PRACH resource is changed from the first period to the second period.

[0301] In addition, the PEI is received before the terminal device receives the paging. The period of the first type of PRACH is greater than the period of the second type of PRACH, and the first period is greater than the second period. For example, the first type of PRACH is a long-period PRACH, and the second type of PRACH is a short-period PRACH. The period of the first type of PRACH resource is greater than the period of the second type of PRACH resource. For example, the first type of PRACH resource is a long-period PRACH resource, and the second type of PRACH resource is a short-period PRACH resource. In addition, the first period is greater than the second period. For example, the first period is a long period, and the second period is a short period.

[0302] It should be noted that generally, the terminal device sends a long-period PRACH or the terminal device sends a PRACH according to a long period. Because it is a long period, the terminal device can send fewer PRACHs. Then, before the network device needs to send the paging (such as addressing the terminal device), the network device can indicate the terminal device to send a short-period PRACH or to send a PRACH according to a short period by sending the PEI. In this way, after the terminal device receives the PEI, the terminal device can send a short-period PRACH or send a PRACH according to a short period after the terminal device receives the paging. Because it is a short period, the terminal device can send more PRACHs.

[0303] It can be seen that after the terminal device receives the PEI, the terminal device changes from originally sending the first type of PRACH to sending the second type of PRACH, or the terminal device changes from originally sending the PRACH according to the first period to sending the PRACH according to the second period. Since the period of the first type of SSB is greater than the period of the second type of SSB, and the first period is greater than the second period, after the terminal device receives the PEI, the terminal device can change from originally sending less PRACH to sending more PRACH, thereby realizing adaptive sending of PRACH.

[0304] The following is an example of a terminal device receiving a PEI at the mth millisecond, time slot or symbol. As shown in FIG. 5, FIG. 5 is a flow diagram of another communication method according to an embodiment of the present application, which specifically includes the following steps:

[0305] S510. If the terminal device receives the PEI at the mth millisecond, time slot or symbol, and the PRACH resource indication information in the PEI is a valid value, the terminal device determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or the terminal device determines that the period of the PRACH resource changes from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0306] It should be noted that before S510, the terminal device can determine that the first type of PRACH resource is valid or that the period of the PRACH resource is the first period.

[0307] In addition, after receiving the PEI at the mth millisecond, time slot or symbol, the terminal device can need a time delay of d milliseconds, time slots or symbols to determine that the second type of PRACH resource is valid or that the period of the PRACH resource is the second period. When d is 0, it means that the terminal device determines that the second type of PRACH resource is valid or that the period of the PRACH resource changes from the first period to the second period after the mth millisecond, time slot or symbol.

[0308] The terminal device determines that the period of the PRACH resource changes from the first period to the second period after the (m+d)th millisecond, time slot or symbol, which means that after the (m+d)th millisecond, time slot or symbol, the terminal device determines that the period of the PRACH resource changes from the first period to the second period starting from the most recent PRACH resource.

[0309] In addition, the PRACH resource indication information can indicate whether the second type of PRACH resource or the PRACH resource with the second period is valid. When the PRACH resource indication information is a valid value, it indicates that the second type of PRACH resource is valid or the PRACH resource with the second period is valid, so that the terminal device can determine that the second type of PRACH resource is valid or the period of the PRACH resource is the second period according to the valid value of the PRACH resource indication information. Optionally, the valid value can be 0 or 1.

[0310] It can be seen that since the terminal device determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol or the terminal device determines that the period of the PRACH resource changes from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the terminal device can send the second type of PRACH or send the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from sending less PRACH to sending more PRACH, thereby realizing adaptive sending of the PRACH.

[0311] For the network device, taking the example that the network device indicates the terminal device to send the second type of PRACH or send the PRACH according to the second period, the network device originally receives the first type of PRACH or receives the PRACH according to the first period; then, after the network device sends the PEI, the network device can receive the second type of PRACH or receive the PRACH according to the second period after the network device sends the paging.

[0312] That is, the network device can determine that the first type of PRACH resource is valid or the period of the PRACH resource is the first period. After the network device sends the PEI, the network device can determine that the second type of PRACH resource is valid or the period of the PRACH resource changes from the first period to the second period.

[0313] In addition, the PEI is sent before the network device sends the paging. The period of the first type of PRACH is greater than the period of the second type of PRACH. For example, the first type of PRACH is a long-period PRACH, and the second type of PRACH is a short-period PRACH. The period of the first type of PRACH resource is greater than the period of the second type of PRACH resource. For example, the first type of PRACH resource is a long-period PRACH resource, and the second type of PRACH resource is a short-period PRACH resource. In addition, the first period is greater than the second period. For example, the first period is a long period, and the second period is a short period.

[0314] It should be noted that, generally, the network device receives the PRACH with the long period or the network device receives the PRACH according to the long period. Since it is the long period, the network device can receive less PRACH. Then, before the network device needs to send the paging (such as addressing the terminal device), the network device can indicate the terminal device to send the PRACH with the short period or send the PRACH according to the short period by sending the PEI. In this way, after the network device sends the PEI, the network device can receive the PRACH with the short period or receive the PRACH according to the short period after the network device sends the paging. Since it is the short period, the network device can receive more PRACH.

[0315] It can be seen that, after the network device sends the PEI, the network device changes from originally receiving the first type of PRACH to receiving the second type of PRACH, or the network device changes from originally receiving the PRACH according to the first period to receiving the PRACH according to the second period. Since the period of the first type of SSB is greater than the period of the second type of SSB, and the first period is greater than the second period, after the network device sends the paging, the network device can change from originally receiving less PRACH to receiving more PRACH, thereby realizing adaptive reception of the PRACH.

[0316] The following takes an example of the network device sending the PEI on the mth millisecond, time slot or symbol. As shown in FIG. 6, FIG. 6 is a flowchart of another communication method according to an embodiment of the present application, specifically including the following steps:

[0317] S610. determining that the PRACH resource indication information in the PEI is a valid value, and sending the PEI; if the network device sends the PEI on the mth millisecond, time slot or symbol, then after the (m+d)th millisecond, time slot or symbol, the network device determines that the second type of PRACH resource is valid, or after the (m+d)th millisecond, time slot or symbol, the network device determines that the period of the PRACH resource changes from the first period to the second period, m is a positive integer, and d is an integer greater than or equal to 0.

[0318] It should be noted that, before S610, the network device can determine that the first type of PRACH resource is valid or determine that the period of the PRACH resource is the first period.

[0319] In addition, after sending the PEI on the mth millisecond, time slot or symbol, the network device can need a time delay of d milliseconds, time slots or symbols to determine that the second type of PRACH resource is valid or the period of the PRACH resource is the second period. When d is 0, it means that the network device determines that the second type of PRACH resource is valid or the period of the PRACH resource changes from the first period to the second period after the mth millisecond, time slot or symbol.

[0320] The network device determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol. This means that the network device determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, starting from the nearest PRACH resource.

[0321] In addition, the PRACH resource indication information can indicate whether the second type of PRACH resource or the PRACH resource with the second period is valid. When the PRACH resource indication information is a valid value, it means that the second type of PRACH resource is valid or the PRACH resource with the second period is valid, so that the network device can tell the terminal device that the second type of PRACH resource is valid or the period of the PRACH resource is the second period through the valid value of the PRACH resource indication information. Optionally, the valid value can be 0 or 1.

[0322] It can be seen that since the network device determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or the network device determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the network device can receive the second type of PRACH or receive the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from receiving less PRACH to receiving more PRACH, thereby realizing adaptive reception of PRACH.

[0323] The following illustrates d in FIG. 5 and FIG. 6.

[0324] In some possible examples, d can be a preset value, or can be a value indicated by the network device from a plurality of preset values through signaling, or can be a value selected by the terminal device from a plurality of preset values according to its own capability. Wherein, the terminal device has informed the network device of its own capability through high layer signaling, and both sides can reach consistency.

[0325]

Scenario Two

[0326] In "Scenario Two", through the PEI, the terminal device can receive more SSBs before receiving the paging, so as to realize that the terminal device supports adaptive reception of SSBs. Correspondingly, through the PEI, the network device can send more SSBs before sending the paging, so as to realize that the network device supports adaptive sending of SSBs.

[0327] The following will be specifically described from the terminal device and the network device respectively.

[0328] For the terminal device, taking the example of the PEI indicating the terminal device to receive the second-type SSB or to receive the SSB according to the second period, the terminal device originally receives the first-type SSB or receives the SSB according to the first period; then, after the terminal device receives the PEI, the terminal device can receive the second-type SSB or receive the SSB according to the second period before the terminal device receives the paging.

[0329] That is, the terminal device can determine that the first-type SSB burst is valid or the period of the SSB burst is the first period. After the terminal device receives the PEI, the terminal device can determine that the second-type SSB burst is valid or the period of the SSB burst is changed from the first period to the second period.

[0330] It should be noted that the SSB burst mentioned in the embodiment can be an on-demand SSB.

[0331] The first-type SSB burst can be understood as one or more first-type SSBs. The second-type SSB burst can be understood as one or more second-type SSBs.

[0332] When the terminal device determines that the first-type SSB burst is valid, it means that the terminal device can receive the first-type SSB. When the terminal device determines that the period of the SSB burst is the first period, it means that the terminal device can receive the SSB according to the first period. When the terminal device determines that the second-type SSB burst is valid, it means that the terminal device can receive the second-type SSB. When the terminal device determines that the period of the SSB burst is the second period, the terminal device can receive the SSB according to the second period.

[0333] The terminal device receiving the first-type SSB burst can be equivalent to the terminal device receiving at least one first-type SSB in the first-type SSB burst. The terminal device receiving the SSB burst can be equivalent to the terminal device receiving at least one SSB in the SSB burst. The terminal device receiving the second-type SSB burst can be equivalent to the terminal device receiving at least one second-type SSB in the second-type SSB burst.

[0334] In addition, the PEI is received before the terminal device receives the paging. The first type of SSB has a longer period than the second type of SSB. For example, the first type of SSB is a long-period SSB, and the second type of SSB is a short-period SSB. The first type of SSB burst has a longer period than the second type of SSB burst. For example, the first type of SSB burst is a long-period SSB burst, and the second type of SSB burst is a short-period SSB burst. In addition, the first period is longer than the second period. For example, the first period is a long period, and the second period is a short period.

[0335] It should be noted that, in general, the terminal device receives a long-period SSB or the terminal device receives an SSB according to a long period. Because it is a long period, the terminal device can receive fewer SSBs. Then, before the network device needs to send a paging (such as addressing the terminal device), the network device can indicate the terminal device to receive a short-period SSB or receive an SSB according to a short period by sending a PEI. In this way, after the terminal device receives the PEI, the terminal device can receive a short-period SSB or receive an SSB according to a short period before the terminal device receives the paging. Because it is a short period, the terminal device can receive more SSBs.

[0336] It can be seen that, after the terminal device receives the PEI, the terminal device changes from originally receiving the first type of SSB to receiving the second type of SSB, or the terminal device changes from originally receiving an SSB according to the first period to receiving an SSB according to the second period. Because the first type of SSB has a longer period than the second type of SSB, and the first period is longer than the second period, after the terminal device receives the PEI, the terminal device can change from originally receiving fewer SSBs to receiving more SSBs, thereby realizing adaptive reception of SSBs.

[0337] The following is an example of the terminal device receiving a PEI at the mth millisecond, time slot, or symbol. As shown in FIG. 7, FIG. 7 is a flow diagram of another communication method according to an embodiment of the present application, which specifically includes the following steps:

[0338] S710. If the terminal device receives the PEI at the mth millisecond, time slot, or symbol, and the SSB burst indication information in the PEI is a valid value, the terminal device determines that the second type of SSB burst is valid after the (m+d)th millisecond, time slot, or symbol, or the terminal device determines that the period of the SSB burst changes from the first period to the second period after the (m+d)th millisecond, time slot, or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0339] It should be noted that before S710, the terminal device can determine that the first type of SSB burst is valid or that the period of the SSB burst is the first period.

[0340] In addition, after receiving the PEI on the mth millisecond, time slot or symbol, the terminal device can need a delay of d milliseconds, time slots or symbols to determine that the second type of SSB burst is valid or that the period of the SSB burst is the second period. When d is 0, this means that the terminal device determines that the second type of SSB burst is valid or that the period of the SSB burst changes from the first period to the second period after the mth millisecond, time slot or symbol.

[0341] The SSB burst indication information can indicate whether the second type of SSB burst or the SSB burst with the second period is valid. When the SSB burst indication information is a valid value, this means that the second type of SSB burst is valid or the SSB burst with the second period is valid, so that the terminal device can determine that the second type of SSB burst is valid or that the period of the SSB burst is the second period according to the SSB burst indication information being the valid value. Optionally, the valid value can be 0 or 1.

[0342] It can be seen that since the terminal device determines that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol or that the period of the SSB burst changes from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the terminal device can receive the second type of SSB or the SSB with the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally receiving less SSB to receiving more SSB, thereby realizing adaptive reception of SSB. In addition, since the (m+d)th millisecond, time slot or symbol is more likely to be before a paging frame (PF) or a paging occasion (PO) associated with the PEI, the terminal device can receive the second type of SSB burst or the SSB burst with the second period before the PF / PO, so that the terminal device can reach downlink time-frequency synchronization as soon as possible and start receiving paging as soon as possible through the second type of SSB burst or the SSB burst with the second period.

[0343] For the network device, taking the example of indicating the terminal device to receive the second type of SSB or the SSB with the second period through the PEI, the network device originally transmits the first type of SSB or the SSB with the first period; then, after the network device transmits the PEI, the network device can transmit the second type of SSB or the SSB with the second period before the network device transmits paging.

[0344] That is, the network device can determine that the first type of SSB burst is valid or the period of the SSB burst is the first period. After the network device transmits the PEI, the network device can determine that the second type of SSB burst is valid or the period of the SSB burst is changed from the first period to the second period.

[0345] It should be noted that when the network device determines that the first type of SSB burst is valid, it means that the network device can transmit the first type of SSB. When the network device determines that the period of the SSB burst is the first period, it means that the network device can transmit the SSB according to the first period. When the network device determines that the second type of SSB burst is valid, it means that the network device can transmit the second type of SSB. When the network device determines that the period of the SSB burst is the second period, the network device can transmit the SSB according to the second period.

[0346] The network device transmitting the first type of SSB burst can be equivalent to the network device transmitting at least one first type of SSB in the first type of SSB burst. The network device transmitting the SSB burst can be equivalent to the network device transmitting at least one SSB in the SSB burst. The network device transmitting the second type of SSB burst can be equivalent to the network device transmitting at least one second type of SSB in the second type of SSB burst.

[0347] In addition, the PEI is transmitted before the network device transmits the paging. The period of the first type of SSB is greater than the period of the second type of SSB. For example, the first type of SSB is a long-period SSB, and the second type of SSB is a short-period SSB. The period of the first type of SSB burst is greater than the period of the second type of SSB burst. For example, the first type of SSB burst is a long-period SSB burst, and the second type of SSB burst is a short-period SSB burst. In addition, the first period is greater than the second period. For example, the first period is a long period, and the second period is a short period.

[0348] It should be noted that generally, the network device transmits a long-period SSB or the network device transmits the SSB according to a long period. Because it is a long period, the network device can transmit fewer SSBs. Then, before the network device needs to transmit the paging (such as addressing the terminal device), the network device can indicate the terminal device to receive a short-period SSB or receive the SSB according to a short period by transmitting the PEI. In this way, after the network device transmits the PEI, the network device can transmit a short-period SSB or transmit the SSB according to a short period before the network device transmits the paging. Because it is a short period, the network device can transmit more SSBs.

[0349] It can be seen that after the network device finishes sending the PEI, the network device changes from sending the first type of SSB to sending the second type of SSB, or the network device changes from sending the SSB according to the first period to sending the SSB according to the second period. Since the period of the first type of SSB is greater than the period of the second type of SSB, and the first period is greater than the second period, after the network device finishes sending the PEI, the network device can change from sending fewer SSBs to sending more SSBs, thereby achieving adaptive sending of SSBs.

[0350] The following is an example of the network device sending the PEI at the mth millisecond, time slot or symbol. As shown in FIG. 8, FIG. 8 is a flowchart of another communication method according to an embodiment of the present application, which specifically includes the following steps:

[0351] S810. Determine that the SSB burst indication information in the PEI is a valid value, and send the PEI; if the network device finishes sending the PEI at the mth millisecond, time slot or symbol, then after the (m+d)th millisecond, time slot or symbol, the network device determines that the second type of SSB burst is valid, or after the (m+d)th millisecond, time slot or symbol, the network device determines that the period of the SSB burst changes from the first period to the second period, m is a positive integer, and d is an integer greater than or equal to 0.

[0352] It should be noted that before S810, the network device can determine that the first type of SSB burst is valid or that the period of the SSB burst is the first period.

[0353] In addition, after the PEI is finished being sent at the mth millisecond, time slot or symbol, the network device can need a delay of d milliseconds, time slots or symbols to determine that the second type of SSB burst is valid or that the period of the SSB burst is the second period. When d is 0, it means that the network device determines that the second type of SSB burst is valid or that the period of the SSB burst changes from the first period to the second period after the mth millisecond, time slot or symbol.

[0354] The SSB burst indication information can indicate whether the second type of SSB burst or the SSB burst with the second period is valid. When the SSB burst indication information is a valid value, it means that the second type of SSB burst is valid or the SSB burst with the second period is valid, so that the network device can tell the terminal device that the second type of SSB burst is valid or the period of the SSB burst is the second period through the SSB burst indication information being a valid value. Optionally, the valid value can be 0 or 1.

[0355] It can be seen that, due to the network device determining that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol or the network device determining that the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the network device can send the second type of SSB or send the SSB according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally sending less SSB to sending more SSB, thereby realizing adaptive sending of SSB. In addition, since the (m+d)th millisecond, time slot or symbol is more likely to be before the PF or PO associated with the PEI, the network device can send the second type of SSB burst or the SSB burst of the second period before the PF / PO, so that the network device can quickly perform downlink time-frequency synchronization with the terminal device and quickly start sending paging.

[0356] The following illustrates d in FIG. 7 and FIG. 8.

[0357] In some possible examples, d can be a preset value, or can be a value indicated by the network device from a plurality of preset values through signaling, or can be a value selected by the terminal device from a plurality of preset values according to its own capability. Wherein, the terminal device has informed the network device of its own capability through high-layer signaling, and both sides can reach consistency.

[0358]

Case Three

[0359] In “Case Three”, through the PEI, the terminal device can receive more SSBs before receiving the paging, so as to realize that the terminal device supports adaptive receiving of SSBs. Correspondingly, through the PEI, the network device can send more SSBs before sending the paging, so as to realize that the network device supports adaptive sending of SSBs.

[0360] The following illustrates the terminal device and the network device respectively.

[0361] For the terminal device, taking the terminal device receiving the second type of SSB or receiving the SSB according to the second period as an example, the terminal device originally receives the first type of SSB or receives the SSB according to the first period; then, after the start frame in the paging cycle associated with the PEI where the PF is located, the terminal device can receive the second type of SSB or receive the SSB according to the second period before receiving the paging.

[0362] That is, the terminal device can determine that the first type of SSB burst is valid or the period of the SSB burst is the first period. After the starting frame of the paging cycle in which the PF associated with the PEI is located, the terminal device can determine that the second type of SSB burst is valid or the period of the SSB burst is changed from the first period to the second period. In addition, the PEI is received before the terminal device receives the paging. The period of the first type of SSB is greater than the period of the second type of SSB. For example, the first type of SSB is a long-period SSB, and the second type of SSB is a short-period SSB. The first period is greater than the second period. For example, the first period is a long period, and the second period is a short period.

[0363] It should be noted that generally, the terminal device receives a long-period SSB or the terminal device receives an SSB according to a long period. Because it is a long period, the terminal device can receive fewer SSBs. Then, before the network device needs to send a paging (such as addressing the terminal device), the network device can instruct the terminal device to receive a short-period SSB or receive an SSB according to a short period by sending a PEI. In this way, after the starting frame of the paging cycle in which the PF associated with the PEI is located, the terminal device can receive a short-period SSB or receive an SSB according to a short period before the terminal device receives the paging. Because it is a short period, the terminal device can receive more SSBs.

[0364] It can be seen that after the starting frame of the paging cycle in which the PF associated with the PEI is located, the terminal device changes from originally receiving the first type of SSB to receiving the second type of SSB, or the terminal device changes from originally receiving an SSB according to the first period to receiving an SSB according to the second period. Because the period of the first type of SSB is greater than the period of the second type of SSB, and the first period is greater than the second period, after the starting frame of the paging cycle in which the PF associated with the PEI is located, the terminal device can change from originally receiving fewer SSBs to receiving more SSBs, thereby realizing adaptive reception of SSBs.

[0365] The following is an example of taking the starting frame of the paging cycle in which the PF associated with the PEI is located as the first starting frame. As shown in FIG. 9, FIG. 9 is a flow diagram of another communication method according to an embodiment of the present application, which specifically includes the following steps:

[0366] S910. If the terminal device receives the PEI and the SSB burst indication information in the PEI is a valid value, the terminal device determines that the second type of SSB burst is valid after the first starting frame, or the terminal device determines that the period of the SSB burst is changed from the first period to the second period after the first starting frame.

[0367] It should be noted that before S910, the terminal device can determine that the first type of SSB burst is valid or determine that the period of the SSB burst is the first period.

[0368] In addition, the SSB burst indication information can indicate whether the second type of SSB burst or the SSB burst with the second period is valid. When the SSB burst indication information is a valid value, it means that the second type of SSB burst is valid or the SSB burst with the second period is valid, so that the terminal device can determine that the second type of SSB burst is valid or the period of the SSB burst is the second period according to the SSB burst indication information being the valid value. Optionally, the valid value can be 0 or 1.

[0369] In addition, the second type of SSB burst or the SSB burst with the second period can be configured by the network device to the terminal device in the connected state, and can be shared to the terminal device in the idle state / inactive state (i.e., the terminal device receiving the PEI / paging).

[0370] It can be seen that since the terminal device determines that the period of the SSB burst is changed from the first period to the second period after the first starting frame, the terminal device can receive the second type of SSB or receive the SSB according to the second period after the first starting frame, so as to change from originally receiving less SSB to receiving more SSB, thereby realizing adaptive reception of SSB. In addition, since the first starting frame is the starting frame in the paging cycle in which the PF associated with the PEI is located, the terminal device can quickly achieve downlink time-frequency synchronization and quickly start receiving paging through the second type of SSB burst or the SSB burst with the second period.

[0371] For the network device, taking the example of indicating the terminal device to receive the second type of SSB or receive the SSB according to the second period through the PEI, the network device originally transmits the first type of SSB or transmits the SSB according to the first period; then, after the starting frame in the paging cycle in which the PF associated with the PEI is located, the network device can transmit the second type of SSB or transmit the SSB according to the second period before the network device transmits the paging.

[0372] That is, the network device can determine that the first type of SSB burst is valid or the period of the SSB burst is the first period. After the start frame of the paging cycle in which the PF associated with the PEI is located, the network device can determine that the second type of SSB burst is valid or the period of the SSB burst is changed from the first period to the second period. In addition, the PEI is sent before the network device sends a paging. The period of the first type of SSB is greater than the period of the second type of SSB. For example, the first type of SSB is a long-period SSB, and the second type of SSB is a short-period SSB. The first period is greater than the second period. For example, the first period is a long period, and the second period is a short period.

[0373] It should be noted that, generally, the network device sends a long-period SSB or the network device sends the SSB according to a long period. Because it is a long period, the network device can send fewer SSBs. Then, before the network device needs to send a paging (such as addressing a terminal device), the network device can indicate the terminal device to receive a short-period SSB or receive the SSB according to a short period by sending a PEI. In this way, after the start frame of the paging cycle in which the PF associated with the PEI is located, the network device can send a short-period SSB or receive the SSB according to a short period before the network device sends a paging. Because it is a short period, the network device can send more SSBs.

[0374] It can be seen that, after the start frame of the paging cycle in which the PF associated with the PEI is located, the network device changes from originally sending the first type of SSB to sending the second type of SSB, or the network device changes from originally sending the SSB according to the first period to sending the SSB according to the second period. Because the period of the first type of SSB is greater than the period of the second type of SSB, and the first period is greater than the second period, the network device can change from originally sending fewer SSBs to sending more SSBs after the start frame of the paging cycle in which the PF associated with the PEI is located, thereby achieving adaptive sending of SSBs.

[0375] The following is an example of taking the first start frame as the start frame of the paging cycle in which the PF associated with the PEI is located. As shown in FIG. 10, FIG. 10 is a flow diagram of another communication method according to an embodiment of the present application, which specifically includes the following steps:

[0376] S1010. Determine that the SSB burst indication information in the PEI is a valid value, and send the PEI; if the network device has finished sending the PEI, the network device determines that the second type of SSB burst is valid after the first start frame, or the network device determines that the period of the SSB burst is changed from the first period to the second period after the first start frame.

[0377] It should be noted that before S1010, the network device can determine that the first type of SSB burst is valid or determine that the period of the SSB burst is the first period.

[0378] In addition, the SSB burst indication information can indicate whether the second type of SSB burst or the SSB burst with the second period is valid. When the SSB burst indication information is a valid value, it means that the second type of SSB burst is valid or the SSB burst with the second period is valid, so that the network device can tell the terminal device that the second type of SSB burst is valid or the period of the SSB burst is the second period through the valid value of the SSB burst indication information. Optionally, the valid value can be 0 or 1.

[0379] In addition, the second type of SSB burst or the SSB burst with the second period can be configured by the network device to the terminal device in the connected state, and can be shared to the terminal device in the idle state / inactive state (i.e., the terminal device receiving the PEI / paging).

[0380] It can be seen that since the network device determines that the period of the SSB burst is changed from the first period to the second period after the first start frame, the network device can send the second type of SSB or receive the SSB according to the second period after the first start frame, so as to change from originally sending less SSB to sending more SSB, thereby realizing adaptive sending of SSB. In addition, since the first start frame is the start frame in the paging period in which the PEI-associated PF is located, the network device can perform downlink time-frequency synchronization with the terminal device as soon as possible and start sending paging as soon as possible through the second type of SSB burst or the SSB burst with the second period.

[0381]

Embodiment 3

[0382] In “Embodiment 3”, this embodiment can specifically illustrate the support of adaptive sending of PRACH by the terminal device, the support of adaptive receiving of PRACH by the network device, the support of adaptive receiving of SSB by the terminal device, and the support of adaptive sending of PRACH by the network device from different situations through the indication of the paging.

[0383]

Situation 1

[0384] In “Situation 1”, the support of adaptive sending of PRACH by the terminal device and the support of adaptive receiving of PRACH by the network device are illustrated respectively through the indication of the paging.

[0385] For the terminal device, taking the example of indicating the terminal device to send the second type of PRACH or send the PRACH according to the second period by the paging, the terminal device originally sends the first type of PRACH or sends the PRACH according to the first period; then, after the terminal device receives the paging, the terminal device can send the second type of PRACH or send the PRACH according to the second period.

[0386] That is, the terminal device can determine that the first type of PRACH resource is valid or the period of the PRACH resource is the first period. After the terminal device receives the paging, the terminal device can determine that the second type of PRACH resource is valid or the period of the PRACH resource is changed from the first period to the second period.

[0387] In addition, the period of the first type of PRACH is greater than the period of the second type of PRACH. For example, the first type of PRACH is a long-period PRACH, and the second type of PRACH is a short-period PRACH. The first period is greater than the second period. For example, the first period is a long period, and the second period is a short period.

[0388] It should be noted that generally, the terminal device sends a long-period PRACH or the terminal device sends a PRACH according to a long period. Because it is a long period, the terminal device can send fewer PRACHs. Then, when the network device needs to send a paging (such as addressing the terminal device), the network device can indicate the terminal device to send a short-period PRACH or send a PRACH according to a short period by sending the paging. In this way, when the terminal device receives the paging, the terminal device can send a short-period PRACH or send a PRACH according to a short period after the terminal device receives the paging. Because it is a short period, the terminal device can send more PRACHs.

[0389] It can be seen that after the terminal device receives the paging, the terminal device changes from originally sending the first type of PRACH to sending the second type of PRACH, or the terminal device changes from originally sending the PRACH according to the first period to sending the PRACH according to the second period. Because the period of the first type of SSB is greater than the period of the second type of SSB, and the first period is greater than the second period, after the terminal device receives the paging, the terminal device can change from originally sending fewer PRACHs to sending more PRACHs, thereby realizing adaptive sending of PRACH.

[0390] The following takes the example of the terminal device receiving the paging at the mth millisecond, time slot or symbol. As shown in FIG. 11, FIG. 11 is a flow diagram of another communication method according to an embodiment of the present application, specifically including the following steps:

[0391] S1110. If the terminal device receives the paging in the mth millisecond, time slot or symbol, and the PRACH resource indication information in the paging is a valid value, the terminal device determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or the terminal device determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0392] It should be noted that before S1110, the terminal device can determine that the first type of PRACH resource is valid or that the period of the PRACH resource is the first period.

[0393] In addition, after receiving the paging in the mth millisecond, time slot or symbol, the terminal device can need a time delay of d milliseconds, time slots or symbols to determine that the second type of PRACH resource is valid or that the period of the PRACH resource is the second period. When d is 0, it means that the terminal device determines that the second type of PRACH resource is valid or that the period of the PRACH resource is changed from the first period to the second period after the mth millisecond, time slot or symbol.

[0394] The terminal device determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol can mean that the terminal device determines that the period of the PRACH resource is changed from the first period to the second period starting from the nearest PRACH resource after the (m+d)th millisecond, time slot or symbol.

[0395] In addition, the PRACH resource indication information can indicate whether the second type of PRACH resource or the PRACH resource with the second period is valid. When the PRACH resource indication information is a valid value, it means that the second type of PRACH resource is valid or the PRACH resource with the second period is valid, so that the terminal device can determine that the second type of PRACH resource is valid or the period of the PRACH resource is the second period according to the PRACH resource indication information being a valid value. Optionally, the valid value can be 0 or 1.

[0396] It can be seen that since the terminal device determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol or the terminal device determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the terminal device can send the second type of PRACH or send the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from sending less PRACH to sending more PRACH, thereby realizing adaptive sending of PRACH.

[0397] For the network device, taking the example of indicating the terminal device to send the second type of PRACH or send the PRACH according to the second period, the network device originally receives the first type of PRACH or receives the PRACH according to the first period; then, after the network device finishes sending the paging, the network device can receive the second type of PRACH or receive the PRACH according to the second period.

[0398] That is, the network device can determine that the first type of PRACH resource is valid or the period of the PRACH resource is the first period. After the network device finishes sending the paging, the network device can determine that the second type of PRACH resource is valid or the period of the PRACH resource is changed from the first period to the second period.

[0399] In addition, the period of the first type of PRACH is greater than the period of the second type of PRACH. For example, the first type of PRACH is a long-period PRACH, and the second type of PRACH is a short-period PRACH. The first period is greater than the second period. For example, the first period is a long period, and the second period is a short period.

[0400] It should be noted that generally, the network device receives the long-period PRACH or the network device receives the PRACH according to the long period. Because it is a long period, the network device can receive fewer PRACHs. Then, when the network device needs to send the paging (such as addressing the terminal device), the network device can indicate the terminal device to send the short-period PRACH or send the PRACH according to the short period by sending the paging. In this way, after the network device finishes sending the paging, the network device can receive the short-period PRACH or receive the PRACH according to the short period after the network device finishes sending the paging. Because it is a short period, the network device can receive more PRACHs.

[0401] It can be seen that, after the network device finishes sending the paging, the network device changes from originally receiving the first type of PRACH to receiving the second type of PRACH, or the network device changes from originally receiving the PRACH according to the first period to receiving the PRACH according to the second period. Because the period of the first type of SSB is greater than the period of the second type of SSB, and the first period is greater than the second period, after the network device finishes sending the paging, the network device can change from originally receiving fewer PRACHs to receiving more PRACHs, thereby realizing adaptive reception of the PRACH.

[0402] The following takes the example of the network device finishing sending the paging at the mth millisecond, time slot, or symbol. As shown in FIG. 12, FIG. 12 is a flowchart of another communication method according to an embodiment of the present application, specifically including the following steps:

[0403] S1210. Determine that the PRACH resource indication information in the paging is a valid value, and send the paging; if the network device sends the paging on the mth millisecond, time slot or symbol, the network device determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or the network device determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0404] It should be noted that before S1210, the network device can determine that the first type of PRACH resource is valid or that the period of the PRACH resource is the first period.

[0405] In addition, after sending the paging on the mth millisecond, time slot or symbol, the network device can need a delay of d milliseconds, time slots or symbols to determine that the second type of PRACH resource is valid or that the period of the PRACH resource is the second period. When d is 0, it means that the network device determines that the second type of PRACH resource is valid or that the period of the PRACH resource is changed from the first period to the second period after the mth millisecond, time slot or symbol.

[0406] The network device determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol can mean that the network device determines that the period of the PRACH resource is changed from the first period to the second period starting from the most recent PRACH resource after the (m+d)th millisecond, time slot or symbol.

[0407] In addition, the PRACH resource indication information can indicate whether the second type of PRACH resource or the PRACH resource with the second period is valid. When the PRACH resource indication information is a valid value, it means that the second type of PRACH resource is valid or the PRACH resource with the second period is valid, so that the network device can tell the terminal device that the second type of PRACH resource is valid or the period of the PRACH resource is the second period through the PRACH resource indication information being a valid value. Optionally, the valid value can be 0 or 1.

[0408] It can be seen that, since the network device determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol or the network device determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the network device can receive the second type of PRACH or receive the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally receiving less PRACH to receiving more PRACH, thereby realizing adaptive reception of PRACH.

[0409] The following illustrates d in FIG. 11 and FIG. 12.

[0410] In some possible examples, d can be a preset value, or can be a value indicated by the network device from a plurality of preset values through signaling, or can be a value selected by the terminal device from a plurality of preset values according to its own capability. Wherein, the terminal device has informed the network device of its own capability through high-layer signaling, and both sides can reach consistency.

[0411] The following illustrates PRACH resource indication information in the paging in FIG. 11 and FIG. 12.

[0412] In some possible examples, for the PRACH resource indication information in the paging, the PRACH resource indication information occupies reserved bits in the paging.

[0413] For example, taking the paging as the paging PDCCH or the paging DCI, the PRACH resource indication information occupies the reserved bits in the paging PDCCH or the paging DCI.

[0414] It should be noted that, since the remaining reserved bits in the paging PDCCH or the paging DCI are few, when the tracking reference signal (TRS) used by the terminal device in the idle state / activated state uses M (M is a positive integer) reserved bits, the remaining reserved bits in the paging PDCCH or the paging DCI in the non-shared spectrum scenario are only (6-M), or the remaining reserved bits in the paging PDCCH or the paging DCI in the shared spectrum scenario are only (8-M).

[0415] In some possible examples, for the PRACH resource indication information in the paging, the PRACH resource indication information occupies the remaining bits in the short message in the paging.

[0416] For example, taking the paging as the paging PDCCH or the paging DCI, the PRACH resource indication information occupies the remaining bits in the short message in the paging PDCCH or the paging DCI.

[0417] It should be noted that the remaining reserved bits in the paging PDCCH or the paging DCI can be 0, for example, when the TRS used by the terminal device in the idle state / activated state uses M reserved bits, and M = 6, the remaining reserved bits in the non-shared spectrum scenario are 0. At this time, the embodiment can consider that the PRACH resource indication information occupies the remaining bits in the short message in the paging PDCCH or the paging DCI. As shown in Table 1, the short message has 8 bits, 4 bits have been occupied, and 4 bits are left. Among them, the first bit is occupied by the system information update information, the second bit is occupied by the earthquake and tsunami warning system (ETWS) and the commercial mobile alert system (CMAS) indication information, the third bit is occupied by the stop paging monitoring information, the fourth bit is occupied by the extended discontinuous reception (eDRX) system information update information, and the fifth to eighth bits are remaining bits.

[0418] For example, the PRACH resource indication information occupies one or more remaining bits in the short message. If the code point of the one or more bits is a preset value, the PRACH resource indication information is a valid value.

[0419] Table 1

[0420]

Case 2

[0421] In the "case 2", through the indication of the paging, the terminal device can receive more SSBs before the terminal device receives the RAR, so as to realize that the terminal device supports adaptive reception of SSBs. Correspondingly, through the indication of the paging, the network device can send more SSBs before the network device sends the RAR, so as to realize that the network device supports adaptive sending of SSBs.

[0422] The following will be specifically described from the terminal device and the network device respectively.

[0423] For the terminal device, taking the example that the paging indicates the terminal device to receive the second type of SSB or receive the SSB according to the second period, the terminal device originally receives the first type of SSB or receives the SSB according to the first period; then, when the terminal device receives the paging, the terminal device can receive the second type of SSB or receive the SSB according to the second period before the terminal device receives the RAR.

[0424] That is, the terminal device can determine that the first type of SSB burst is valid or the period of the SSB burst is the first period. After the terminal device receives the paging, the terminal device can determine that the second type of SSB burst is valid or the period of the SSB burst is changed from the first period to the second period.

[0425] In addition, the period of the first type of SSB is greater than the period of the second type of SSB. For example, the first type of SSB is a long-period SSB, and the second type of SSB is a short-period SSB. The first period is greater than the second period. For example, the first period is a long period, and the second period is a short period.

[0426] It should be noted that generally, the terminal device receives a long-period SSB or the terminal device receives an SSB according to a long period. Since it is a long period, the terminal device can receive fewer SSBs. Then, when the network device needs to send paging (such as addressing the terminal device), the network device can indicate the terminal device to receive a short-period SSB or receive an SSB according to a short period by sending the paging. In this way, when the terminal device receives the paging, the terminal device can receive a short-period SSB or receive an SSB according to a short period. Since it is a short period, the terminal device can receive more SSBs.

[0427] It can be seen that after the terminal device receives the paging, the terminal device changes from originally receiving the first type of SSB to receiving the second type of SSB, or the terminal device changes from originally receiving an SSB according to the first period to receiving an SSB according to the second period. Since the period of the first type of SSB is greater than the period of the second type of SSB, and the first period is greater than the second period, when the terminal device receives the paging, the terminal device can change from originally receiving fewer SSBs to receiving more SSBs, thereby realizing adaptive reception of SSBs.

[0428] The following is an example of a terminal device receiving a paging at the mth millisecond, time slot, or symbol. As shown in FIG. 13, FIG. 13 is a flow diagram of another communication method according to an embodiment of the present application, which specifically includes the following steps:

[0429] S1310. If the terminal device receives a paging at the mth millisecond, time slot, or symbol, and the SSB burst indication information in the paging is a valid value, the terminal device determines that the second type of SSB burst is valid after the (m+d)th millisecond, time slot, or symbol, or the terminal device determines that the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot, or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0430] It should be noted that before S1310, the terminal device can determine that the first type of SSB burst is valid or that the period of the SSB burst is the first period.

[0431] In addition, after receiving the paging on the mth millisecond, time slot or symbol, the terminal device can need a delay of d milliseconds, time slots or symbols to determine that the second type of SSB burst is valid or that the period of the SSB burst is the second period. When d is 0, it means that the terminal device determines that the second type of SSB burst is valid or that the period of the SSB burst changes from the first period to the second period after the mth millisecond, time slot or symbol.

[0432] The SSB burst indication information can indicate whether the second type of SSB burst or the SSB burst with the second period is valid. When the SSB burst indication information is a valid value, it means that the second type of SSB burst is valid or the SSB burst with the second period is valid, so that the terminal device can determine that the second type of SSB burst is valid or the period of the SSB burst is the second period according to the SSB burst indication information being the valid value. Optionally, the valid value can be 0 or 1.

[0433] It can be seen that since the terminal device determines that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol or that the period of the SSB burst changes from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the terminal device can receive the second type of SSB or the SSB with the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally receiving less SSB to receiving more SSB, thereby realizing adaptive reception of SSB. In addition, since the (m+d)th millisecond, time slot or symbol is more likely to be before the time domain location of the PRACH resource, the terminal device can receive the second type of SSB burst or the SSB burst with the second period before the time domain location of the PRACH resource, so that the terminal device can reach downlink time-frequency synchronization as soon as possible and start sending PRACH as soon as possible through the second type of SSB burst or the SSB burst with the second period.

[0434] For the network device, taking the example of indicating the terminal device to receive the second type of SSB or the SSB with the second period through the paging, the network device originally sends the first type of SSB or the SSB with the first period; then, when the network device finishes sending the paging, the network device can send the second type of SSB or the SSB with the second period before the network device sends the RAR.

[0435] That is, the network device can determine that the first type of SSB burst is valid or the period of the SSB burst is the first period. After the network device transmits the paging, the network device can determine that the second type of SSB burst is valid or the period of the SSB burst is changed from the first period to the second period.

[0436] In addition, the period of the first type of SSB is greater than the period of the second type of SSB. For example, the first type of SSB is a long-period SSB, and the second type of SSB is a short-period SSB. The first period is greater than the second period. For example, the first period is a long period, and the second period is a short period.

[0437] It should be noted that, generally, the network device transmits a long-period SSB or transmits an SSB according to a long period. Because it is a long period, the network device can transmit fewer SSBs. Then, when the network device needs to transmit paging (such as paging a terminal device), the network device can instruct the terminal device to receive a short-period SSB or receive an SSB according to a short period by transmitting the paging. In this way, when the network device finishes transmitting the paging, the network device can transmit a short-period SSB or transmit an SSB according to a short period. Because it is a short period, the network device can transmit more SSBs.

[0438] It can be seen that, after the network device finishes transmitting the paging, the network device changes from originally transmitting the first type of SSB to transmitting the second type of SSB, or the network device changes from originally transmitting the SSB according to the first period to transmitting the SSB according to the second period. Because the period of the first type of SSB is greater than the period of the second type of SSB, and the first period is greater than the second period, after the network device finishes transmitting the paging, the network device can change from originally transmitting fewer SSBs to transmitting more SSBs, thereby realizing adaptive transmission of SSBs.

[0439] The following takes an example in which the network device transmits paging on the mth millisecond, time slot, or symbol. As shown in FIG. 14, FIG. 14 is a flow diagram of another communication method according to an embodiment of the present application, specifically including the following steps:

[0440] S1410. Determine that the SSB burst indication information in the paging is a valid value, and transmit the paging; if the network device finishes transmitting the paging on the mth millisecond, time slot, or symbol, then after the (m+d)th millisecond, time slot, or symbol, the network device determines that the second type of SSB burst is valid, or after the (m+d)th millisecond, time slot, or symbol, the network device determines that the period of the SSB burst is changed from the first period to the second period, m is a positive integer, and d is an integer greater than or equal to 0.

[0441] It should be noted that before S1410, the network device can determine that the first type of SSB burst is valid or that the period of the SSB burst is the first period.

[0442] In addition, after the paging is sent on the mth millisecond, time slot or symbol, the network device can need a delay of d milliseconds, time slots or symbols to determine that the second type of SSB burst is valid or that the period of the SSB burst is the second period. When d is 0, it means that the network device determines that the second type of SSB burst is valid or that the period of the SSB burst changes from the first period to the second period after the mth millisecond, time slot or symbol.

[0443] The SSB burst indication information can indicate whether the second type of SSB burst or the SSB burst with the second period is valid. When the SSB burst indication information is a valid value, it means that the second type of SSB burst is valid or the SSB burst with the second period is valid, so that the network device can tell the terminal device that the second type of SSB burst is valid or the period of the SSB burst is the second period through the SSB burst indication information being the valid value. Optionally, the valid value can be 0 or 1.

[0444] In addition, the second type of SSB burst can be understood as one or more second type of SSBs; when the second type of SSB burst is valid, it means that the network device can send the second type of SSB burst; when the period of the SSB burst is the second period, it means that the network device can send the SSB burst according to the second period. Wherein, the network device sending the second type of SSB burst can be equivalent to the network device sending at least one second type of SSB in the second type of SSB burst, and the network device sending the SSB burst can be equivalent to the network device sending at least one SSB in the SSB burst.

[0445] It can be seen that, due to the network device determining that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol or the network device determining that the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the network device can send the second type of SSB or send the SSB according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally sending less SSB to sending more SSB, thereby realizing adaptive sending of SSB. In addition, since the (m+d)th millisecond, time slot or symbol is more likely to be before the time domain location of the PRACH resource, the network device can send the second type of SSB burst or the SSB burst of the second period before the time domain location of the PRACH resource, so that the network device can perform downlink time-frequency synchronization with the terminal device as soon as possible and start receiving PRACH as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0446] The following illustrates d in FIG. 13 and FIG. 14.

[0447] In some possible examples, d can be a preset value, or can be a value indicated by the network device from a plurality of preset values through signaling, or can be a value selected by the terminal device from a plurality of preset values according to its own capability. Wherein, the terminal device has informed the network device of its own capability through high layer signaling, and both sides can reach consistency.

[0448] The following illustrates the PRACH resource indication information in the paging in FIG. 13 and FIG. 14.

[0449] In some possible examples, for the SSB burst indication information in the paging, the SSB burst indication information occupies the reserved bit in the paging.

[0450] For example, taking the paging as the paging PDCCH or the paging DCI, the SSB burst indication information occupies the reserved bit in the paging PDCCH or the paging DCI.

[0451] It should be noted that, since the remaining reserved bits in the paging PDCCH or the paging DCI are less, when the TRS used by the terminal device in the idle state / activated state uses M (M is a positive integer) reserved bits, the remaining reserved bits in the paging PDCCH or the paging DCI in the unshared spectrum scenario are only (6-M), or the remaining reserved bits in the paging PDCCH or the paging DCI in the shared spectrum scenario are only (8-M).

[0452] In some possible examples, for the SSB burst indication information in the paging, the SSB burst indication information occupies the remaining bits in the short message in the paging.

[0453] For example, taking the paging PDCCH or paging DCI as an example, the SSB burst indication information occupies the remaining bits in the short message in the paging PDCCH or paging DCI.

[0454] It should be noted that the remaining reserved bits in the paging PDCCH or paging DCI can be 0. For example, when the TRS used by the terminal device in the idle state or inactive state uses M reserved bits, and M = 6, the remaining reserved bits in the non-shared spectrum scenario are 0. At this time, the embodiment can consider that the SSB burst indication information occupies the remaining bits in the short message in the paging PDCCH or paging DCI. For example, the SSB burst indication information occupies the remaining 1 or more bits in the short message. If the code point of the 1 or more bits is a preset value, the SSB burst indication information is a valid value.

[0455]

Case 3

[0456] In the "case 3", through the indication of the paging, before the terminal device receives the RAR, the terminal device can receive more SSBs, so as to realize that the terminal device supports adaptive reception of SSBs. Correspondingly, through the indication of the paging, before the network device sends the RAR, the network device can send more SSBs, so as to realize that the network device supports adaptive sending of SSBs.

[0457] The following will be specifically described from the terminal device and the network device respectively.

[0458] For the terminal device, taking the paging indicating the terminal device to receive the second type of SSB or receive the SSB according to the second period as an example, the terminal device originally receives the first type of SSB or receives the SSB according to the first period; then, after the starting frame in the paging cycle in which the PF associated with the paging is located, the terminal device can receive the second type of SSB or receive the SSB according to the second period.

[0459] That is, the terminal device can determine that the first type of SSB burst is valid or the period of the SSB burst is the first period. After the starting frame in the paging cycle in which the PF associated with the paging is located, the terminal device can determine that the second type of SSB burst is valid or the period of the SSB burst is changed from the first period to the second period.

[0460] In addition, the period of the first type of SSB is greater than the period of the second type of SSB. For example, the first type of SSB is a long-period SSB, and the second type of SSB is a short-period SSB. The first period is greater than the second period. For example, the first period is a long period, and the second period is a short period.

[0461] It should be noted that, generally, the terminal device receives a long-period SSB or the terminal device receives an SSB according to a long period. Since it is a long period, the terminal device can receive fewer SSBs. Then, before the network device needs to send a paging (such as addressing a terminal device), the network device can indicate the terminal device to receive a short-period SSB or receive an SSB according to a short period by sending a PEI. In this way, after the start frame of the paging cycle in which the PF associated with the PEI is located, the terminal device can receive a short-period SSB or receive an SSB according to a short period before the terminal device receives a paging. Since it is a short period, the terminal device can receive more SSBs.

[0462] It can be seen that, after the start frame of the paging cycle in which the PF associated with the paging is located, the terminal device changes from originally receiving the first type of SSB to receiving the second type of SSB, or the terminal device changes from originally receiving an SSB according to the first period to receiving an SSB according to the second period. Since the period of the first type of SSB is greater than the period of the second type of SSB, and the first period is greater than the second period, the terminal device can change from originally receiving fewer SSBs to receiving more SSBs after the start frame of the paging cycle in which the PF associated with the paging is located, thereby realizing adaptive reception of SSBs.

[0463] The following is an example of taking the second start frame as the start frame of the paging cycle in which the PF associated with the paging is located. As shown in FIG. 15, FIG. 15 is a flow diagram of another communication method according to an embodiment of the present application, which specifically includes the following steps:

[0464] S1510. If the terminal device receives a paging and the SSB burst indication information in the paging is a valid value, the terminal device determines that the second type of SSB burst is valid after the second start frame, or the terminal device determines that the period of the SSB burst changes from the first period to the second period after the second start frame.

[0465] It should be noted that, before S1510, the terminal device can determine that the first type of SSB burst is valid or determine that the period of the SSB burst is the first period.

[0466] In addition, the SSB burst indication information can indicate whether the second type of SSB burst or the SSB burst with the second period is valid. When the SSB burst indication information is a valid value, it indicates that the second type of SSB burst is valid or the SSB burst with the second period is valid, so that the terminal device can determine that the second type of SSB burst is valid or the period of the SSB burst is the second period according to the valid value of the SSB burst indication information. Optionally, the valid value can be 0 or 1.

[0467] In addition, the second type of SSB burst or the SSB burst with the second period can be configured by the network device to the terminal device in the connected state, and can be shared to the terminal device in the idle state / inactive state (i.e., the terminal device receiving the PEI / paging).

[0468] It can be seen that since the terminal device determines that the period of the SSB burst is changed from the first period to the second period after the second starting frame, the terminal device can receive the second type of SSB or receive the SSB according to the second period after the second starting frame, so as to change from originally receiving less SSB to receiving more SSB, thereby realizing adaptive reception of SSB. In addition, since the second starting frame is a starting frame in the paging cycle in which the paging associated PF is located, the terminal device can quickly achieve downlink time-frequency synchronization through the second type of SSB burst or the SSB burst with the second period.

[0469] For the network device, taking the example of indicating the terminal device to receive the second type of SSB or the SSB according to the second period by paging, the network device originally transmits the first type of SSB or transmits the SSB according to the first period; then, after the starting frame in the paging cycle in which the paging associated PF is located, the network device can transmit the second type of SSB or transmit the SSB according to the second period.

[0470] That is, the network device can determine that the first type of SSB burst is valid or the period of the SSB burst is the first period. After the starting frame in the paging cycle in which the paging associated PF is located, the network device can determine that the second type of SSB burst is valid or the period of the SSB burst is changed from the first period to the second period.

[0471] In addition, the period of the first type of SSB is greater than the period of the second type of SSB. For example, the first type of SSB is a long-period SSB, and the second type of SSB is a short-period SSB. The first period is greater than the second period. For example, the first period is a long period, and the second period is a short period.

[0472] It should be noted that, generally, the network device transmits the SSB with a long period or transmits the SSB with a long period. Because it is a long period, the network device can transmit fewer SSBs. Then, before the network device needs to transmit a paging (such as paging the terminal device), the network device can indicate the terminal device to receive the SSB with a short period or receive the SSB with a short period by transmitting the paging. In this way, the network device can transmit the SSB with a short period or receive the SSB with a short period after the start frame in the paging cycle in which the PF associated with the paging is located. Because it is a short period, the network device can transmit more SSBs.

[0473] It can be seen that, after the start frame in the paging cycle in which the PF associated with the paging is located, the network device changes from originally transmitting the first type of SSB to transmitting the second type of SSB, or the network device changes from originally transmitting the SSB with the first period to transmitting the SSB with the second period. Because the period of the first type of SSB is greater than the period of the second type of SSB, and the first period is greater than the second period, the network device can change from originally transmitting fewer SSBs to transmitting more SSBs after the start frame in the paging cycle in which the PF associated with the paging is located, thereby realizing adaptive transmission of the SSB.

[0474] The following is an example of taking the start frame in the paging cycle in which the PF associated with the paging is located as an example. As shown in FIG. 16, FIG. 16 is a flow diagram of another communication method according to an embodiment of the present application, which specifically includes the following steps:

[0475] S1610. Determine that the SSB burst indication information in the paging is a valid value, and transmit the paging; if the network device transmits the paging, the network device determines that the second type of SSB burst is valid after the second start frame, or the network device determines that the period of the SSB burst changes from the first period to the second period after the second start frame.

[0476] It should be noted that, before S1610, the network device can determine that the first type of SSB burst is valid or determine that the period of the SSB burst is the first period.

[0477] In addition, the SSB burst indication information can indicate whether the second type of SSB burst or the SSB burst with the second period is valid. When the SSB burst indication information is a valid value, it means that the second type of SSB burst is valid or the SSB burst with the second period is valid, so that the network device can tell the terminal device that the second type of SSB burst is valid or the period of the SSB burst is the second period through the valid value of the SSB burst indication information. Optionally, the valid value can be 0 or 1.

[0478] In addition, the second type of SSB burst or the SSB burst with the second period can be configured by the network device to the terminal device in the connected state, and can be shared to the terminal device in the idle state / inactive state (i.e., the terminal device receiving the PEI / paging).

[0479] It can be seen that since the network device determines that the period of the SSB burst is changed from the first period to the second period after the first starting frame, the network device can send the second type of SSB or receive the SSB according to the second period after the first starting frame, so as to change from originally sending fewer SSBs to sending more SSBs, thereby realizing adaptive sending of SSBs. In addition, since the second starting frame is the starting frame in the paging period in which the PF of the paging is located, the network device can perform downlink time-frequency synchronization with the terminal device as soon as possible through the second type of SSB burst or the SSB burst with the second period.

[0480] The PRACH resource indication information in the paging in FIG. 15 or FIG. 16 is described below.

[0481] In some possible examples, for the SSB burst indication information in the paging, the SSB burst indication information occupies the reserved bits in the paging.

[0482] For example, taking the paging as the paging PDCCH or the paging DCI, the SSB burst indication information occupies the reserved bits in the paging PDCCH or the paging DCI.

[0483] It should be noted that since the remaining reserved bits in the paging PDCCH or the paging DCI are few, when the TRS used by the terminal device in the idle state / inactive state uses M (M is a positive integer) reserved bits, the remaining reserved bits in the paging PDCCH or the paging DCI in the non-shared spectrum scenario are only (6-M), or the remaining reserved bits in the paging PDCCH or the paging DCI in the shared spectrum scenario are only (8-M).

[0484] In some possible examples, for the SSB burst indication information in the paging, the SSB burst indication information occupies the remaining bits in the short message in the paging.

[0485] For example, taking the paging as the paging PDCCH or the paging DCI, the SSB burst indication information occupies the remaining bits in the short message in the paging PDCCH or the paging DCI.

[0486] It should be noted that the remaining reserved bits in the paging PDCCH or the paging DCI can be 0. For example, when the TRS used by the terminal device in the idle state / inactive state uses M reserved bits, and M = 6, the remaining reserved bits in the non-shared spectrum scenario are 0. At this time, the embodiment can consider that the SSB burst indication information occupies the remaining bits in the short message in the paging PDCCH or the paging DCI. For example, the SSB burst indication information occupies 1 or more bits in the short message. If the code point of the 1 or more bits is a preset value, the SSB burst indication information is a valid value.

[0487] [Embodiment 4]

[0488] In “Embodiment 4”, through the indication of the RAR, the terminal device can receive more SSBs before receiving the Msg4 or before sending the Msg3, so as to realize that the terminal device supports adaptive reception of SSBs. Correspondingly, through the indication of the RAR, the network device can send more SSBs before sending the Msg4 or before receiving the Msg3, so as to realize that the network device supports adaptive sending of SSBs.

[0489] It should be noted that the RAR here can be one of the RAR PDCCH, the RAR DCI, the RAR PDSCH or the RAR message.

[0490] The following will be specifically described from the terminal device and the network device respectively.

[0491] For the terminal device, taking the example that the RAR indicates the terminal device to receive the second type of SSB or receive the SSB according to the second period, the terminal device originally receives the first type of SSB or receives the SSB according to the first period; then, when the terminal device receives the RAR, the terminal device can receive the second type of SSB or receive the SSB according to the second period before receiving the Msg4 or before sending the Msg3.

[0492] That is, the terminal device can determine that the first type of SSB burst is valid or the period of the SSB burst is the first period. When the terminal device receives the RAR, the terminal device can determine that the second type of SSB burst is valid or the period of the SSB burst is changed from the first period to the second period.

[0493] In addition, the period of the first type of SSB is greater than the period of the second type of SSB. For example, the first type of SSB is a long-period SSB, and the second type of SSB is a short-period SSB. The first period is greater than the second period. For example, the first period is a long period, and the second period is a short period.

[0494] It should be noted that, generally, the terminal device receives the SSB with the long period or receives the SSB according to the long period. Since it is the long period, the terminal device can receive less SSB. Then, before the terminal device needs to receive the Msg4 or the terminal device needs to send the Msg3, the network device can indicate the terminal device to receive the SSB with the short period or receive the SSB according to the short period by sending the RAR. In this way, before the terminal device needs to receive the Msg4 or the terminal device needs to send the Msg3, the terminal device can receive the SSB with the short period or receive the SSB according to the short period. Since it is the short period, the terminal device can receive more SSB.

[0495] It can be seen that, after the terminal device receives the RAR, the terminal device changes from originally receiving the first type of SSB to receiving the second type of SSB, or the terminal device changes from originally receiving the SSB according to the first period to receiving the SSB according to the second period. Since the period of the first type of SSB is greater than the period of the second type of SSB, and the first period is greater than the second period, when the terminal device receives the RAR, the terminal device can change from originally receiving less SSB to receiving more SSB, thereby realizing adaptive reception of the SSB.

[0496] The following is an example of the terminal device receiving the RAR at the mth millisecond, time slot or symbol. As shown in FIG. 17, FIG. 17 is a flow diagram of another communication method according to an embodiment of the present application, which specifically includes the following steps:

[0497] S1710. If the terminal device receives the RAR at the mth millisecond, time slot or symbol, and the SSB burst indication information in the RAR is a valid value, the terminal device determines that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol, or the terminal device determines that the period of the SSB burst changes from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0498] It should be noted that, before S1710, the terminal device can determine that the first type of SSB burst is valid or determine that the period of the SSB burst is the first period.

[0499] In addition, after receiving the RAR at the mth millisecond, time slot or symbol, the terminal device can need a time delay of d milliseconds, time slots or symbols to determine that the second type of SSB burst is valid or the period of the SSB burst is the second period. When d is 0, it means that the network device determines that the second type of SSB burst is valid or the period of the SSB burst changes from the first period to the second period after the mth millisecond, time slot or symbol.

[0500] The SSB burst indication information can indicate whether the second type of SSB burst or the SSB burst with the second period is valid. When the SSB burst indication information is a valid value, it means that the second type of SSB burst is valid or the SSB burst with the second period is valid, so that the terminal device can determine that the second type of SSB burst is valid or the period of the SSB burst is the second period according to the valid value of the SSB burst indication information. Optionally, the valid value can be 0 or 1.

[0501] It can be seen that since the terminal device determines that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol or the terminal device determines that the period of the SSB burst changes from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the terminal device can receive the second type of SSB or receive the SSB according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally receiving less SSB to receiving more SSB, thereby realizing adaptive reception of SSB. In addition, since the (m+d)th millisecond, time slot or symbol is before Msg4 or Msg3, the terminal device can receive the second type of SSB burst or the SSB burst with the second period before Msg4 or Msg3, so that the terminal device can reach downlink time-frequency synchronization as soon as possible and start receiving Msg4 or start sending Msg3 as soon as possible through the second type of SSB burst or the SSB burst with the second period.

[0502] For the network device, taking the example that the network device indicates the terminal device to receive the second type of SSB or receive the SSB according to the second period, the network device originally transmits the first type of SSB or transmits the SSB according to the first period; then, when the network device transmits the RAR, the network device can transmit the second type of SSB or transmit the SSB according to the second period before the network device transmits Msg4 or before the network device receives Msg3.

[0503] That is, the network device can determine that the first type of SSB burst is valid or the period of the SSB burst is the first period. When the network device transmits the RAR, the network device can determine that the second type of SSB burst is valid or the period of the SSB burst changes from the first period to the second period.

[0504] In addition, the period of the first type of SSB is greater than the period of the second type of SSB. For example, the first type of SSB is a long-period SSB, and the second type of SSB is a short-period SSB. The first period is greater than the second period. For example, the first period is a long period, and the second period is a short period.

[0505] It should be noted that, generally, the network device transmits the SSB with a long period or the network device transmits the SSB with a long period. Because it is a long period, the network device can transmit fewer SSBs. Then, before the network device needs to transmit the Msg4 or the network device needs to receive the Msg3, the network device can instruct the terminal device to receive the SSB with a short period or receive the SSB according to a short period by transmitting the RAR. In this way, when the network device transmits the RAR, the network device can transmit the SSB with a short period or transmit the SSB according to a short period. Because it is a short period, the network device can transmit more SSBs.

[0506] It can be seen that, after the network device transmits the RAR, the network device changes from originally transmitting the first type of SSB to transmitting the second type of SSB, or the network device changes from originally transmitting the SSB according to the first period to transmitting the SSB according to the second period. Because the period of the first type of SSB is greater than the period of the second type of SSB, and the first period is greater than the second period, after the network device transmits the RAR, the network device can change from originally transmitting fewer SSBs to transmitting more SSBs, thereby realizing adaptive transmission of the SSB.

[0507] The following is an example of the network device transmitting the RAR at the mth millisecond, time slot or symbol. As shown in FIG. 18, FIG. 18 is a flow diagram of another communication method according to an embodiment of the present application, which specifically includes the following steps:

[0508] S1810. Determine that the SSB burst indication information in the RAR is a valid value, and transmit the RAR; if the network device transmits the RAR at the mth millisecond, time slot or symbol, then after the (m+d)th millisecond, time slot or symbol, the network device determines that the second type of SSB burst is valid, or after the (m+d)th millisecond, time slot or symbol, the network device determines that the period of the SSB burst changes from the first period to the second period, m is a positive integer, and d is an integer greater than or equal to 0.

[0509] It should be noted that, before S1810, the network device can determine that the first type of SSB burst is valid or determine that the period of the SSB burst is the first period.

[0510] In addition, after transmitting the RAR at the mth millisecond, time slot or symbol, the network device can need a time delay of d milliseconds, time slots or symbols to determine that the second type of SSB burst is valid or the period of the SSB burst is the second period. When d is 0, it means that the network device determines that the second type of SSB burst is valid or the period of the SSB burst changes from the first period to the second period after the mth millisecond, time slot or symbol.

[0511] The SSB burst indication information can indicate whether the second type of SSB burst or the SSB burst with the second period is valid. When the SSB burst indication information is a valid value, it means that the second type of SSB burst is valid or the SSB burst with the second period is valid, so that the network device can tell the terminal device that the second type of SSB burst is valid or the period of the SSB burst is the second period through the valid value of the SSB burst indication information. Optionally, the valid value can be 0 or 1.

[0512] It can be seen that since the network device determines that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol or determines that the period of the SSB burst changes from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the network device can send the second type of SSB or send the SSB according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally sending less SSB to sending more SSB, thereby realizing adaptive sending of SSB. In addition, since the (m+d)th millisecond, time slot or symbol is before the Msg4 or Msg3, the network device can send the second type of SSB burst or the SSB burst with the second period before the Msg4 or Msg3, so that the network device can perform downlink time-frequency synchronization with the terminal device as soon as possible and start sending the Msg4 or start receiving the Msg3 as soon as possible through the second type of SSB burst or the SSB burst with the second period.

[0513] The following illustrates d in FIG. 17 and FIG. 18.

[0514] In some possible examples, d can be a preset value, or can be a value indicated by the network device from a plurality of preset values through signaling, or can be a value selected by the terminal device from a plurality of preset values according to its own capability. Wherein, the terminal device has informed the network device of its own capability through high-layer signaling, and the two parties can reach consistency.

[0515]

Embodiment 5

[0516] In “Embodiment 5”, the present embodiment can indicate whether the PRACH resource indication information and the SSB burst indication information are valid values through network indication or network configuration.

[0517] As shown in FIG. 19, FIG. 19 is a flow diagram of another communication method according to an embodiment of the present application, which specifically includes the following steps:

[0518] S1910. The network device sends indication information indicating whether the PRACH resource indication information is or is not a valid value and whether the SSB burst indication information is or is not a valid value.

[0519] In this way, whether the PRACH resource indication information and the SSB burst indication information are valid values is indicated by the indication information through network indication or network configuration.

[0520] The following embodiments respectively illustrate whether the PRACH resource indication information and the SSB burst indication information are valid values from different situations.

[0521]

Situation a

[0522] In "situation a", the embodiments consider that the PRACH resource indication information and the SSB burst indication information occupy the same one bit in paging, PEI or RAR. That is, one bit in paging, PEI or RAR indicates whether the PRACH resource indication information is or is not a valid value and whether the SSB burst indication information is or is not a valid value. At this time, the indication information includes one bit. Wherein, the one bit indicates whether the PRACH resource indication information is or is not a valid value and whether the SSB burst indication information is or is not a valid value.

[0523] In this way, one bit can indicate whether the PRACH resource indication information and the SSB burst indication information are valid values, thereby facilitating saving signaling overhead.

[0524] In some possible examples, one code point of one bit indicates that the PRACH resource indication information and the SSB burst indication information are both valid values; another code point of one bit indicates that the PRACH resource indication information is a valid value and the SSB burst indication information is not a valid value, or another code point indicates that the PRACH resource indication information and the SSB burst indication information are both not valid values, or another code point indicates that the PRACH resource indication information is not a valid value and the SSB burst indication information is a valid value.

[0525] It should be noted that since one bit has two code points, the embodiments can consider that one code point indicates that the PRACH resource indication information and the SSB burst indication information are both valid values, another code point indicates that the PRACH resource indication information is a valid value and the SSB burst indication information is not a valid value, or another code point indicates that the PRACH resource indication information and the SSB burst indication information are both not valid values, or another code point indicates that the PRACH resource indication information is not a valid value and the SSB burst indication information is a valid value.

[0526] For example, as shown in Table 2, one bit has code point 1 and code point 2. Among them, code point 1 indicates that the PRACH resource indication information and the SSB burst indication information are both valid values, so when code point 1 is taken, the network device or the terminal device can determine that the PRACH resource indication information and the SSB burst indication information are both valid values; code point 2 indicates that the PRACH resource indication information is a valid value and the SSB burst indication information is not a valid value, so when code point 1 is taken, the network device or the terminal device can determine that the PRACH resource indication information is a valid value and the SSB burst indication information is not a valid value.

[0527] Table 2

[0528] Scenario b

[0529] In "scenario b", the embodiment considers that the PRACH resource indication information and the SSB burst indication information each occupy a different bit in the paging, PEI or RAR. That is, for two bits in the paging, PEI or RAR, one of the two bits indicates that the PRACH resource indication information is or is not a valid value, and the other bit indicates that the SSB burst indication information is or is not a valid value. At this time, the indication information includes two bits. Among them, one of the two bits indicates that the PRACH resource indication information is or is not a valid value, and the other bit indicates that the SSB burst indication information is or is not a valid value.

[0530] In this way, the two bits can respectively indicate whether the PRACH resource indication information and the SSB burst indication information are valid values.

[0531] It should be noted that each of the two bits has two code points. Taking the first bit indicating the PRACH resource indication information as an example, since the first bit has two code points, the embodiment can consider that one code point indicates that the PRACH resource indication information is a valid value, and the other code point indicates that the PRACH resource indication information is not a valid value.

[0532] For example, as shown in Table 3, the first bit has code point 1 and code point 2. Among them, code point 1 indicates that the PRACH resource indication information is a valid value, so when code point 1 is taken, the network device or the terminal device can determine that the PRACH resource indication information is a valid value; code point 2 indicates that the PRACH resource indication information is not a valid value, so when code point 2 is taken, the network device or the terminal device can determine that the PRACH resource indication information is not a valid value.

[0533] Table 3

[0534] Taking the bit indicating the SSB burst indication information as a second bit as an example, since the second bit has two code points, one code point can indicate that the SSB burst indication information is a valid value, and the other code point can indicate that the SSB burst indication information is not a valid value.

[0535] For example, as shown in Table 4, the second bit has code point 1 and code point 2. Among them, code point 1 indicates that the SSB burst indication information is a valid value, so when code point 1 is taken, the network device or the terminal device can determine that the SSB burst indication information is a valid value; code point 2 indicates that the SSB burst indication information is not a valid value, so when code point 2 is taken, the network device or the terminal device can determine that the SSB burst indication information is not a valid value.

[0536] Table 4

[0537] Scenario c

[0538] In "scenario c", the embodiment considers that the PRACH resource indication information and the SSB burst indication information occupy the same two bits in the paging, the PEI or the RAR. That is, for the two bits in the paging, the PEI or the RAR, the two bits indicate whether the PRACH resource indication information is or is not a valid value and whether the SSB burst indication information is or is not a valid value. At this time, the indication information includes two bits.

[0539] Among them, the two bits indicate whether the PRACH resource indication information is or is not a valid value and whether the SSB burst indication information is or is not a valid value.

[0540] In this way, the two bits can indicate whether the PRACH resource indication information and the SSB burst indication information are valid values.

[0541] In some possible examples, a first code point of the four code points of the two bits indicates that the PRACH resource indication information and the SSB burst indication information are both valid values; a second code point of the four code points of the two bits indicates that the PRACH resource indication information is a valid value and the SSB burst indication information is not a valid value; a third code point of the four code points of the two bits indicates that the PRACH resource indication information is not a valid value and the SSB burst indication information is a valid value; and a fourth code point of the four code points of the two bits indicates that the PRACH resource indication information and the SSB burst indication information are both not valid values.

[0542] It should be noted that since the two bits have four code points, the embodiment can consider that different code points in the four code points respectively indicate whether the PRACH resource indication information and the SSB burst indication information are valid values.

[0543] For example, as shown in Table 5, the two bits have code point 1, code point 2, code point 3 and code point 4. Among them, code point 1 indicates that the PRACH resource indication information and the SSB burst indication information are both valid values, so when code point 1 is taken, the network device or the terminal device can determine that the PRACH resource indication information and the SSB burst indication information are both valid values; code point 2 indicates that the PRACH resource indication information is a valid value and the SSB burst indication information is not a valid value, so when code point 2 is taken, the network device or the terminal device can determine that the PRACH resource indication information is a valid value and the SSB burst indication information is not a valid value; code point 3 indicates that the PRACH resource indication information is not a valid value and the SSB burst indication information is a valid value, so when code point 3 is taken, the network device or the terminal device can determine that the PRACH resource indication information is not a valid value and the SSB burst indication information is a valid value; code point 4 indicates that the PRACH resource indication information and the SSB burst indication information are both not valid values, so when code point 4 is taken, the network device or the terminal device can determine that the PRACH resource indication information and the SSB burst indication information are both not valid values.

[0544] Table 5

[0545] In some possible examples, one or more code points of the four code points of the two bits indicate that the PRACH resource indication information and the SSB burst indication information are both valid values, and one code point of the four code points of the two bits other than the one or more code points indicates that the PRACH resource indication information and the SSB burst indication information are both not valid values.

[0546] The one or more code points also indicate one of the following: a first period combination, a second period combination, a third period combination, or a fourth period combination; wherein the first period combination is a period of the second type of PRACH resource and a period of the second type of SSB burst; the second period combination is a second period of the PRACH resource and a second period of the SSB burst; the third period combination is a period of the second type of PRACH resource and a second period of the SSB burst; and the fourth period combination is a second period of the PRACH resource and a period of the second type of SSB burst.

[0547] It should be noted that since the two bits have four code points, the embodiment can consider that one or more code points of the four code points can indicate that the PRACH resource indication information and the SSB burst indication information are both valid values, and the one or more code points can also indicate the period of the PRACH resource and the period of the SSB burst. In this way, the period of the second type of PRACH resource or the period of the PRACH resource can be indicated together with the period of the second type of SSB burst or the period of the SSB burst, thereby facilitating saving signaling overhead.

[0548] In addition, one code point of the four code points other than the one or more code points can indicate that the PRACH resource indication information and the SSB burst indication information are both invalid values.

[0549] For example, as shown in Table 6, the two bits have code point 1, code point 2, code point 3, and code point 4. Among them, code point 1, code point 2, or code point 3 indicates that the PRACH resource indication information and the SSB burst indication information are both valid values, and code point 4 indicates that the PRACH resource indication information and the SSB burst indication information are both invalid values. In addition, code point 1, code point 2, or code point 3 also indicates one of the first period combination, the second period combination, the third period combination, or the fourth period combination.

[0550] Table 6

[0551] Optionally, all optional items of the period combination are configured by a high-layer parameter. In this way, all optional items of the period combination can be configured by semi-static signaling, such as SIB or RRC signaling.

[0552] In some possible examples, one or more code points of the four code points of the two bits indicate that the PRACH resource indication information and the SSB burst indication information are both valid values, and one code point of the four code points of the two bits other than the one or more code points indicates that the PRACH resource indication information and the SSB burst indication information are both invalid values;

[0553] The one or more codepoints further indicate one of: a first duration combination, a second duration combination, a third duration combination, or a fourth duration combination; wherein the first duration combination is a duration of the second type of PRACH resource and a duration of the second type of SSB burst; the second duration combination is a second duration of the PRACH resource and a second duration of the SSB burst; the third duration combination is a duration of the second type of PRACH resource and a second duration of the SSB burst; the fourth duration combination is a second duration of the PRACH resource and a duration of the second type of SSB burst.

[0554] It should be noted that since there are four codepoints for the two bits, the embodiment can consider that one or more codepoints of the four codepoints can indicate that the PRACH resource indication information and the SSB burst indication information are both valid values, and the one or more codepoints can further indicate the duration of the PRACH resource and the duration of the SSB burst. In this way, the duration of the second type of PRACH resource or the duration of the PRACH resource can be indicated to change with the duration of the second type of SSB burst or the duration of the SSB burst, thereby facilitating saving signaling overhead. The second duration of the PRACH resource is less than the first duration of the PRACH resource.

[0555] In addition, one codepoint of the four codepoints other than the one or more codepoints can indicate that the PRACH resource indication information and the SSB burst indication information are both invalid values.

[0556] For example, as shown in Table 7, the two bits have codepoint 1, codepoint 2, codepoint 3, and codepoint 4. Among them, codepoint 1, codepoint 2, or codepoint 3 indicates that the PRACH resource indication information and the SSB burst indication information are both valid values, and codepoint 4 indicates that the PRACH resource indication information and the SSB burst indication information are both invalid values. In addition, codepoint 1, codepoint 2, or codepoint 3 further indicates one of the first duration combination, the second duration combination, the third duration combination, or the fourth duration combination.

[0557] Table 7

[0558] Optionally, all options of the duration combination are configured by a high-layer parameter. In this way, all options of the duration combination can be configured by semi-static signaling, such as SIB or RRC signaling.

[0559]

Scenario d

[0560] In the case of "case d", the embodiment considers that the PRACH resource indication information and the SSB burst indication information occupy different bits in the paging, PEI or RAR, the PRACH resource indication information occupies two bits, and the SSB burst indication information occupies one bit. That is, for the three bits in the paging, PEI or RAR, two bits of the three bits indicate that the PRACH resource indication information is or is not a valid value, and the remaining one bit indicates that the SSB burst indication information is or is not a valid value. At this time, the indication information includes three bits.

[0561] wherein two bits of the three bits indicate that the PRACH resource indication information is or is not a valid value, and the remaining one bit indicates that the SSB burst indication information is or is not a valid value.

[0562] In this way, the three bits can respectively indicate whether the PRACH resource indication information and the SSB burst indication information are valid values.

[0563] In some possible examples, for the two bits indicating that the PRACH resource indication information is or is not a valid value, one or more code points of four code points of the two bits indicate that the PRACH resource indication information is a valid value, and one code point of the four code points of the two bits other than the one or more code points indicates that the PRACH resource indication information is not a valid value; the one or more code points also indicate the period of the second type of PRACH resource or the second period of the PRACH resource.

[0564] It should be noted that since the two bits have four code points, the embodiment can consider that one or more code points of the four code points can indicate that the PRACH resource indication information is a valid value, and the one or more code points can also indicate the period of the PRACH resource. In this way, the PRACH resource indication information being a valid value can be indicated together with the period of the PRACH resource, thereby facilitating saving signaling overhead. In addition, one code point of the four code points other than the one or more code points can indicate that the PRACH resource indication information is not a valid value.

[0565] For example, as shown in Table 8, the two bits have code point 1, code point 2, code point 3 and code point 4. Among them, code point 1, code point 2 or code point 3 indicates that the PRACH resource indication information is a valid value, and code point 4 indicates that the PRACH resource indication information is not a valid value. In addition, code point 1, code point 2 or code point 3 also indicates the period of the second type of PRACH resource or the second period of the PRACH resource.

[0566] Table 8

[0567] In some possible examples, for the two bits to indicate whether the PRACH resource indication information is or is not a valid value, one or more codepoints of four codepoints of the two bits indicate that the PRACH resource indication information is a valid value, and one codepoint of the four codepoints of the two bits, except the one or more codepoints, indicates that the PRACH resource indication information is not a valid value; the one or more codepoints also indicate the duration of the second type of PRACH resource or the second duration of the PRACH resource.

[0568] It should be noted that since the two bits have four codepoints, the embodiment can consider that one or more codepoints of the four codepoints can indicate that the PRACH resource indication information is a valid value, and the one or more codepoints can also indicate the duration of the PRACH resource. In this way, the PRACH resource indication information being a valid value can be indicated together with the duration of the PRACH resource, thereby facilitating saving signaling overhead. In addition, one codepoint of the four codepoints, except the one or more codepoints, can indicate that the PRACH resource indication information is not a valid value.

[0569] For example, as shown in Table 9, the two bits have codepoint 1, codepoint 2, codepoint 3, and codepoint 4. Among them, codepoint 1, codepoint 2, or codepoint 3 indicates that the PRACH resource indication information is a valid value, and codepoint 4 indicates that the PRACH resource indication information is not a valid value. In addition, codepoint 1, codepoint 2, or codepoint 3 also indicates the duration of the second type of PRACH resource or the second duration of the PRACH resource.

[0570] Table 9

[0571] In some possible examples, for the remaining one bit to indicate whether the SSB burst indication information is or is not a valid value, since the remaining one bit has two codepoints, the embodiment can consider that one codepoint indicates that the SSB burst indication information is a valid value, and the other codepoint indicates that the SSB burst indication information is not a valid value.

[0572]

Scenario e

[0573] In the “scenario e”, the embodiment considers that the PRACH resource indication information and the SSB burst indication information occupy different bits in the paging, the PEI, or the RAR, the SSB burst indication information occupies two bits, and the PRACH resource indication information occupies one bit. That is, for the three bits in the paging, the PEI, or the RAR, two bits of the three bits indicate whether the SSB burst indication information is or is not a valid value, and the remaining one bit indicates whether the PRACH resource indication information is or is not a valid value. At this time, the indication information includes three bits.

[0574] wherein two of the three bits indicate whether the SSB burst indication information is or is not a valid value and the remaining one bit indicates whether the PRACH resource indication information is or is not a valid value.

[0575] In this way, the three bits can respectively indicate whether the PRACH resource indication information and the SSB burst indication information are valid values.

[0576] In some possible examples, for the two bits indicating whether the SSB burst indication information is or is not a valid value, one or more of four code points of the two bits indicates that the SSB burst indication information is a valid value, and one code point of the four code points of the two bits other than the one or more code points indicates that the SSB burst indication information is not a valid value; the one or more code points further indicates a period of a second type of SSB burst or a second period of the SSB burst.

[0577] It should be noted that since the two bits have four code points, the embodiment can consider that one or more of the four code points can indicate that the SSB burst indication information is a valid value, and the one or more code points can further indicate a period of the SSB burst. In this way, the SSB burst indication information being a valid value can be indicated together with the period of the SSB burst, thereby facilitating saving signaling overhead. In addition, one code point of the four code points other than the one or more code points can indicate that the SSB burst indication information is not a valid value.

[0578] For example, as shown in Table 10, the two bits have code point 1, code point 2, code point 3, and code point 4. Among them, code point 1, code point 2, or code point 3 indicates that the SSB burst indication information is a valid value, and code point 4 indicates that the SSB burst indication information is not a valid value. In addition, code point 1, code point 2, or code point 3 further indicates a period of a second type of SSB burst or a second period of the SSB burst.

[0579] Table 10

[0580] In some possible examples, for the two bits indicating whether the SSB burst indication information is or is not a valid value, one or more of four code points of the two bits indicates that the SSB burst indication information is a valid value, and one code point of the four code points of the two bits other than the one or more code points indicates that the SSB burst indication information is not a valid value; the one or more code points further indicates a duration of a second type of SSB burst or a second duration of the SSB burst.

[0581] It should be noted that since the two bits have four code points, the embodiment can consider that one or more code points of the four code points can indicate that the SSB burst indication information is a valid value, and the one or more code points can also indicate the duration of the SSB burst. In this way, the SSB burst indication information being a valid value can be indicated together with the duration of the SSB burst, thereby facilitating saving signaling overhead. In addition, one code point of the four code points other than the one or more code points can indicate that the SSB burst indication information is not a valid value.

[0582] For example, as shown in Table 11, the two bits have code point 1, code point 2, code point 3, and code point 4. Among them, code point 1, code point 2, or code point 3 indicates that the SSB burst indication information is a valid value, and code point 4 indicates that the SSB burst indication information is not a valid value. In addition, code point 1, code point 2, or code point 3 also indicates the duration of the second type of SSB burst or the second duration of the SSB burst.

[0583] Table 11

[0584] In some possible examples, for the remaining one bit indicating whether the PRACH resource indication information is or is not a valid value, since the remaining one bit has two code points, the embodiment can consider that one code point indicates that the PRACH resource indication information is a valid value, and the other code point indicates that the PRACH resource indication information is not a valid value.

[0585] Scenario f

[0586] In "scenario f", the embodiment considers that the PRACH resource indication information and the SSB burst indication information occupy the same three bits in the paging, PEI, or RAR. That is, for the three bits in the paging, PEI, or RAR, the three bits indicate whether the PRACH resource indication information is or is not a valid value and whether the SSB burst indication information is or is not a valid value. At this time, the indication information includes three bits.

[0587] Among them, the three bits indicate whether the PRACH resource indication information is or is not a valid value and whether the SSB burst indication information is or is not a valid value.

[0588] In this way, the three bits can indicate whether the PRACH resource indication information and the SSB burst indication information are valid values.

[0589] In some possible examples, one or more of the eight codepoints of the three bits indicates that both the PRACH resource indication information and the SSB burst indication information are valid values, and one codepoint of the three bits other than the one or more codepoints indicates that both the PRACH resource indication information and the SSB burst indication information are not valid values.

[0590] The one or more codepoints further indicate one of the following: a first period combination, a second period combination, a third period combination, or a fourth period combination; wherein the first period combination is a period of the second type of PRACH resource and a period of the second type of SSB burst; the second period combination is a second period of the PRACH resource and a second period of the SSB burst; the third period combination is a period of the second type of PRACH resource and a second period of the SSB burst; and the fourth period combination is a second period of the PRACH resource and a period of the second type of SSB burst.

[0591] It should be noted that since there are eight codepoints of the three bits, the eight codepoints can be considered in the embodiment, and one or more of the eight codepoints can indicate that both the PRACH resource indication information and the SSB burst indication information are valid values, and the one or more codepoints can further indicate a period of the PRACH resource and a period of the SSB burst. In this way, the period of the second type of PRACH resource or the period of the PRACH resource can be indicated together with the period of the second type of SSB burst or the period of the SSB burst, thereby facilitating saving signaling overhead.

[0592] In addition, one codepoint of the eight codepoints other than the one or more codepoints can indicate that both the PRACH resource indication information and the SSB burst indication information are not valid values.

[0593] For example, as shown in Table 12, the two bits have codepoint 1, codepoint 2, codepoint 3, codepoint 4, codepoint 5, codepoint 6, codepoint 7, and codepoint 8. Among them, codepoint 1 to codepoint 7 indicate that both the PRACH resource indication information and the SSB burst indication information are valid values, and codepoint 8 indicates that both the PRACH resource indication information and the SSB burst indication information are not valid values. In addition, codepoint 1 to codepoint 7 further indicate one of the first period combination, the second period combination, the third period combination, or the fourth period combination.

[0594] Table 12

[0595] Optionally, all the options of the period combination are configured by a high-layer parameter. In this way, all the options of the period combination can be configured by semi-static signaling, such as SIB or RRC signaling.

[0596] In some possible examples, one or more of the eight codepoints of the three bits indicates that both the PRACH resource indication information and the SSB burst indication information are valid values, and one codepoint of the eight codepoints of the three bits, other than the one or more codepoints, indicates that both the PRACH resource indication information and the SSB burst indication information are not valid values.

[0597] The one or more codepoints further indicate one of: a first duration combination, a second duration combination, a third duration combination, or a fourth duration combination; wherein the first duration combination is a duration of the second type of PRACH resource and a duration of the second type of SSB burst; the second duration combination is a second duration of the PRACH resource and a second duration of the SSB burst; the third duration combination is the duration of the second type of PRACH resource and the second duration of the SSB burst; and the fourth duration combination is the second duration of the PRACH resource and the duration of the second type of SSB burst.

[0598] It should be noted that since the three bits have eight codepoints, the eight codepoints can be considered in the embodiment, and one or more of the eight codepoints can indicate that both the PRACH resource indication information and the SSB burst indication information are valid values, and the one or more codepoints can further indicate a duration of the PRACH resource and a duration of the SSB burst. In this way, the duration of the second type of PRACH resource or the duration of the PRACH resource can be indicated to change with the duration of the second type of SSB burst or the duration of the SSB burst, thereby facilitating saving signaling overhead. The second duration of the PRACH resource is less than the first duration of the PRACH resource.

[0599] In addition, one codepoint of the eight codepoints, other than the one or more codepoints, can indicate that both the PRACH resource indication information and the SSB burst indication information are not valid values.

[0600] For example, as shown in Table 13, the two bits have codepoint 1, codepoint 2, codepoint 3, codepoint 4, codepoint 5, codepoint 6, codepoint 7, and codepoint 8. The codepoint 1 to the codepoint 7 indicate that both the PRACH resource indication information and the SSB burst indication information are valid values, and the codepoint 8 indicates that both the PRACH resource indication information and the SSB burst indication information are not valid values. In addition, the codepoint 1 to the codepoint 7 further indicate one of the first duration combination, the second duration combination, the third duration combination, or the fourth duration combination.

[0601] Table 13

[0602] Optionally, all the optional items of the duration combination are configured by a higher layer parameter. In this way, all the optional items of the duration combination can be configured by semi-static signaling, such as SIB or RRC signaling.

[0603] Scenario g

[0604] In scenario g, the embodiment considers that the PRACH resource indication information and the SSB burst indication information occupy different bits in the paging, PEI or RAR, the PRACH resource indication information occupies two bits, and the SSB burst indication information occupies two bits. That is, for the three bits in the paging, PEI or RAR, two bits of the four bits indicate that the PRACH resource indication information is or is not a valid value, and the remaining two bits indicate that the SSB burst indication information is or is not a valid value. At this time, the indication information includes four bits.

[0605] Among them, two bits of the four bits indicate that the PRACH resource indication information is or is not a valid value, and the remaining two bits indicate that the SSB burst indication information is or is not a valid value.

[0606] In this way, the four bits can respectively indicate whether the PRACH resource indication information and the SSB burst indication information are valid values.

[0607] In some possible examples, for the two bits indicating that the PRACH resource indication information is or is not a valid value, one or more code points of four code points of the two bits indicate that the PRACH resource indication information is a valid value, and one code point of the four code points of the two bits other than the one or more code points indicates that the PRACH resource indication information is not a valid value; the one or more code points also indicate the period of the second type of PRACH resource or the second period of the PRACH resource.

[0608] It should be noted that since the two bits have four code points, the embodiment can consider that one or more code points of the four code points can indicate that the PRACH resource indication information is a valid value, and the one or more code points can also indicate the period of the PRACH resource. In this way, the PRACH resource indication information being a valid value can be indicated together with the period of the PRACH resource, thereby facilitating saving signaling overhead. In addition, one code point of the four code points other than the one or more code points can indicate that the PRACH resource indication information is not a valid value.

[0609] ​​​​​​​​​In some possible examples, for the two bits indicating whether the PRACH resource indication information is or is not a valid value, one or more codepoints of four codepoints of the two bits indicate that the PRACH resource indication information is a valid value, one codepoint of the four codepoints of the two bits other than the one or more codepoints indicates that the PRACH resource indication information is not a valid value; the one or more codepoints further indicate a duration of the second type of PRACH resource or a second duration of the PRACH resource.

[0610] It should be noted that since the two bits have four codepoints, the embodiment can consider that one or more codepoints of the four codepoints can indicate that the PRACH resource indication information is a valid value, and the one or more codepoints can further indicate the duration of the PRACH resource. In this way, the PRACH resource indication information being a valid value can be indicated together with the duration of the PRACH resource, thereby facilitating saving signaling overhead. In addition, one codepoint of the four codepoints other than the one or more codepoints can indicate that the PRACH resource indication information is not a valid value.

[0611] In some possible examples, for the remaining two bits indicating whether the SSB burst indication information is or is not a valid value, one or more codepoints of four codepoints of the remaining two bits indicate that the SSB burst indication information is a valid value, one codepoint of the four codepoints of the remaining two bits other than the one or more codepoints indicates that the SSB burst indication information is not a valid value; the one or more codepoints further indicate a period of the second type of SSB burst or a second period of the SSB burst.

[0612] It should be noted that since the remaining two bits have four codepoints, the embodiment can consider that one or more codepoints of the four codepoints can indicate that the SSB burst indication information is a valid value, and the one or more codepoints can further indicate the period of the SSB burst. In this way, the SSB burst indication information being a valid value can be indicated together with the period of the SSB burst, thereby facilitating saving signaling overhead. In addition, one codepoint of the four codepoints other than the one or more codepoints can indicate that the SSB burst indication information is not a valid value.

[0613] In some possible examples, for the remaining two bits indicating that the SSB burst indication information is or is not a valid value, one or more code points of four code points of the remaining two bits indicate that the SSB burst indication information is a valid value, and one code point of the four code points of the remaining two bits, except the one or more code points, indicates that the SSB burst indication information is not a valid value; the one or more code points further indicate the duration of the second type of SSB burst or the second duration of the SSB burst.

[0614] It should be noted that since there are four code points of the remaining two bits, the embodiment can consider that one or more code points of the four code points can indicate that the SSB burst indication information is a valid value, and the one or more code points can further indicate the duration of the SSB burst. In this way, the SSB burst indication information being a valid value can be indicated together with the duration of the SSB burst, thereby facilitating saving signaling overhead. In addition, one code point of the four code points, except the one or more code points, can indicate that the SSB burst indication information is not a valid value.

[0615]

Embodiment 6

[0616] In the “embodiment 6”, the embodiment can consider determining to terminate using the second type of PRACH resource or the second type of SSB burst, or determining to change the period of the PRACH resource from the second period to the first period or the period of the SSB burst from the second period to the first period.

[0617] For the terminal device, as shown in FIG. 20, FIG. 20 is a flow diagram of another communication method according to an embodiment of the present application, which specifically includes the following steps:

[0618] S2010. After the terminal device receives the Msg4, the terminal device determines to terminate using the second type of PRACH resource or the second type of SSB burst, or determines to change the period of the PRACH resource from the second period to the first period or the period of the SSB burst from the second period to the first period.

[0619] Thus, after the terminal device receives the Msg4, the terminal device can use the RRC configuration in the Msg4 to set the properties of the second type of PRACH resource or the periodic update of the PRACH resource, and / or after the terminal device receives the Msg4, the terminal device can use the RRC configuration in the Msg4 to set the properties of the second type of SSB burst or the periodic update of the SSB burst, so as to terminate or give up the second type of PRACH resource or the second type of SSB burst triggered by the UL WUS, indicated by the PEI, indicated by the paging or indicated by the RAR, or determine that the period of the PRACH resource is changed from the second period to the first period or the period of the SSB burst is changed from the second period to the first period.

[0620] For the network device, as shown in FIG. 21, FIG. 21 is a flow diagram of another communication method according to an embodiment of the application, which specifically includes the following steps:

[0621] S2110. After the network device sends the Msg4, the network device determines to terminate the second type of PRACH resource or the second type of SSB burst, or determines that the period of the PRACH resource is changed from the second period to the first period or the period of the SSB burst is changed from the second period to the first period.

[0622] Thus, after the network device sends the Msg4, the network device can use the RRC configuration in the Msg4 to set the properties of the second type of PRACH resource or the periodic update of the PRACH resource, and / or after the network device sends the Msg4, the network device can use the RRC configuration in the Msg4 to set the properties of the second type of SSB burst or the periodic update of the SSB burst, so as to terminate or give up the second type of PRACH resource or the second type of SSB burst triggered by the UL WUS, indicated by the PEI, indicated by the paging or indicated by the RAR, or determine that the period of the PRACH resource is changed from the second period to the first period or the period of the SSB burst is changed from the second period to the first period.

[0623] The communication device of the present embodiment is described below.

[0624] The above describes the scheme of the embodiments of the present application mainly from the method side. It can be understood that the network device / terminal device comprises a hardware structure and / or a software module corresponding to the execution of each function in order to implement the above functions. Those skilled in the art should easily realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in the present text can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is implemented in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0625] The embodiments of the present application can divide the functional units of the network device / terminal device according to the above method examples. For example, each functional unit can be divided corresponding to each function, or two or more functions can be integrated in one processing unit. The integrated unit can be implemented in the form of hardware or in the form of a software program module. It should be noted that the division of units in the embodiments of the present application is illustrative, which is only a logical function division, and there can be another division way in actual implementation.

[0626] In the case of integrated units, FIG. 22 is a functional unit composition block diagram of a communication apparatus according to an embodiment of the present application. The communication apparatus 2200 comprises a determining unit 2201.

[0627] Optionally, the determining unit 2201 can be a module unit for processing signals, data, information, sequences, etc., without specific limitation.

[0628] Optionally, the determining unit 2201 can be integrated in a processing unit.

[0629] It should be noted that the processing unit can be a processor or a controller, for example, can be a baseband processor, a baseband chip, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in combination with the disclosure of the present application. The processing unit can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0630] Optionally, the communication apparatus 2200 can further include a storage unit for storing computer program codes or instructions executed by the communication apparatus 2200. The storage unit can be a memory.

[0631] Optionally, the communication apparatus 2200 can be a chip or a chip module.

[0632] Optionally, the communication apparatus 2200 can further include a communication unit. It should be noted that the communication unit can be a communication interface, a transceiver, a transceiving circuit, etc.

[0633] Optionally, the determining unit 2201 is configured to perform any step performed by a chip / chip module / terminal device / network device, etc. in the above method embodiments. Details are as follows.

[0634] In implementation, the determining unit 2201 is configured to perform the steps in the above method embodiments, and when performing actions such as sending, other units can be optionally called to complete the corresponding operations. Since the present application relates to multiple manners, details are described as follows from each manner.

[0635] In "Embodiment 1", the determining unit 2201 is configured to:

[0636] If the terminal device sends the uplink wake-up signal on the mth millisecond, time slot or symbol, the second type of PRACH resource is determined to be valid after the (m+d)th millisecond, time slot or symbol, or the period of the PRACH resource is determined to change from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0637] It can be seen that, because the communication apparatus 2200 determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol or the communication apparatus 2200 determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the communication apparatus 2200 can send the second type of PRACH or send the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally sending less PRACH to sending more PRACH, thereby achieving adaptive sending of the PRACH.

[0638] In some possible examples, the uplink wake-up signal is one or more specific preambles in the first type of PRACH resource, and a period of the first type of PRACH resource is greater than a period of the second type of PRACH resource; or

[0639] The uplink wake-up signal is one or more specific preambles in the PRACH resource with the first period.

[0640] In "Case One" of "Embodiment 2", the determining unit 2201 is configured to:

[0641] If the terminal device receives the PEI on the mth millisecond, time slot or symbol, and the PRACH resource indication information in the PEI is a valid value, it is determined that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol or the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0642] It can be seen that, because the communication apparatus 2200 determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol or the communication apparatus 2200 determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the communication apparatus 2200 can send the second type of PRACH or send the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally sending less PRACH to sending more PRACH, thereby achieving adaptive sending of the PRACH.

[0643] In "Case Two" of "Embodiment 2", the determining unit 2201 is configured to:

[0644] If the terminal device receives the PEI in the mth millisecond, time slot or symbol, and the SSB burst indication information in the PEI is a valid value, it is determined that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol, or it is determined that the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0645] It can be seen that, since the communication apparatus 2200 determines that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol, or the communication apparatus 2200 determines that the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the communication apparatus 2200 can receive the second type of SSB or receive the SSB according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally receiving less SSB to receiving more SSB, thereby achieving adaptive reception of the SSB. In addition, since the (m+d)th millisecond, time slot or symbol is more likely to be before the paging frame (PF) or paging occasion (PO) associated with the PEI, the communication apparatus 2200 can receive the second type of SSB burst or the SSB burst of the second period before the PF / PO, so that the communication apparatus 2200 can achieve downlink time-frequency synchronization and start receiving paging as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0646] In "Case Three" of "Embodiment 2", the determining unit 2201 is configured to:

[0647] If the terminal device receives the PEI, and the SSB burst indication information in the PEI is a valid value, it is determined that the second type of SSB burst is valid after the first start frame, or it is determined that the period of the SSB burst is changed from the first period to the second period after the first start frame.

[0648] It can be seen that, since the communication apparatus 2200 determines that the period of the SSB burst is changed from the first period to the second period after the first start frame, the communication apparatus 2200 can receive the second type of SSB or receive the SSB according to the second period after the first start frame, so as to change from originally receiving less SSB to receiving more SSB, thereby achieving adaptive reception of the SSB. In addition, since the first start frame is a start frame in a paging cycle in which the PF associated with the PEI is located, the communication apparatus 2200 can achieve downlink time-frequency synchronization and start receiving paging as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0649] In "Case 1" of "Embodiment 3", the determining unit 2201 is configured to:

[0650] If the terminal device receives the paging in the mth millisecond, time slot or symbol, and the PRACH resource indication information in the paging is a valid value, it is determined that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or it is determined that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0651] It can be seen that, since the communication apparatus 2200 determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or the communication apparatus 2200 determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the terminal device can send the second type of PRACH or send the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from sending less PRACH to sending more PRACH, thereby realizing adaptive sending of the PRACH.

[0652] In some possible examples, the PRACH resource indication information occupies a reserved bit in the paging, or the PRACH resource indication information occupies the remaining bits in the short message in the paging.

[0653] In "Case 2" of "Embodiment 3", the determining unit 2201 is configured to:

[0654] If the terminal device receives the paging in the mth millisecond, time slot or symbol, and the SSB burst indication information in the paging is a valid value, it is determined that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol, or it is determined that the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0655] It can be seen that, since the communication apparatus 2200 determines that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol or the communication apparatus 2200 determines that the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the communication apparatus 2200 can receive the second type of SSB or receive the SSB according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally receiving less SSB to receiving more SSB, thereby achieving adaptive reception of SSB. In addition, since the (m+d)th millisecond, time slot or symbol is more likely to be before the time domain location of the PRACH resource, the communication apparatus 2200 can receive the second type of SSB burst or the SSB burst of the second period before the time domain location of the PRACH resource, so that the communication apparatus 2200 can reach downlink time-frequency synchronization as soon as possible and start sending PRACH as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0656] In some possible examples, the SSB burst indication information occupies reserved bits in the paging, or the SSB burst indication information occupies remaining bits in a short message in the paging.

[0657] In “Case 3” of “Embodiment 3”, the determining unit 2201 is configured to:

[0658] If the terminal device receives the paging, and the SSB burst indication information in the paging is a valid value, it is determined that the second type of SSB burst is valid after the second starting frame or it is determined that the period of the SSB burst is changed from the first period to the second period after the second starting frame.

[0659] It can be seen that, since the communication apparatus 2200 determines that the period of the SSB burst is changed from the first period to the second period after the second starting frame, the communication apparatus 2200 can receive the second type of SSB or receive the SSB according to the second period after the second starting frame, so as to change from originally receiving less SSB to receiving more SSB, thereby achieving adaptive reception of SSB. In addition, since the second starting frame is a starting frame in a paging cycle in which the PF associated with the paging is located, the communication apparatus 2200 can reach downlink time-frequency synchronization as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0660] In “Embodiment 4”, the determining unit 2201 is configured to:

[0661] If the terminal device receives the RAR on the mth millisecond, time slot or symbol, and the SSB burst indication information in the RAR is a valid value, it is determined that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol, or it is determined that the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0662] It can be seen that, since the communication apparatus 2200 determines that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol, or the communication apparatus 2200 determines that the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the communication apparatus 2200 can receive the second type of SSB or receive the SSB according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally receiving less SSB to receiving more SSB, thereby realizing adaptive reception of the SSB. In addition, since the (m+d)th millisecond, time slot or symbol is before the Msg4 or the Msg3, the communication apparatus 2200 can receive the second type of SSB burst or the SSB burst of the second period before the Msg4 or the Msg3, so that the communication apparatus 2200 can reach the downlink time-frequency synchronization as soon as possible and start receiving the Msg4 or start sending the Msg3 as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0663] In "case a" of "embodiment 5", the determining unit 2201 is configured to:

[0664] receive indication information, the indication information indicating that the PRACH resource indication information is or is not a valid value and the SSB burst indication information is or is not a valid value.

[0665] In some possible examples, one code point of the indication information indicates that the PRACH resource indication information and the SSB burst indication information are both valid values;

[0666] another code point of the indication information indicates that the PRACH resource indication information is a valid value and the SSB burst indication information is not a valid value.

[0667] In some possible examples, a first code point of the four code points of the indication information indicates that the PRACH resource indication information and the SSB burst indication information are both valid values;

[0668] a second code point of the four code points of the indication information indicates that the PRACH resource indication information is a valid value and the SSB burst indication information is not a valid value;

[0669] The third codepoint of the four codepoints of the indication information indicates that the PRACH resource indication information is not a valid value and the SSB burst indication information is a valid value;

[0670] The fourth codepoint of the four codepoints of the indication information indicates that neither the PRACH resource indication information nor the SSB burst indication information is a valid value.

[0671] In some possible examples, one or more codepoints of the four codepoints of the indication information indicate that both the PRACH resource indication information and the SSB burst indication information are valid values, and one codepoint of the four codepoints of the indication information, other than the one or more codepoints, indicates that neither the PRACH resource indication information nor the SSB burst indication information is a valid value;

[0672] The one or more codepoints further indicate one of: a first periodicity combination, a second periodicity combination, a third periodicity combination, or a fourth periodicity combination, or the one or more codepoints further indicate one of: a first duration combination, a second duration combination, a third duration combination, or a fourth duration combination;

[0673] The first periodicity combination is a periodicity of the second type of PRACH resource and a periodicity of the second type of SSB burst;

[0674] The second periodicity combination is a second periodicity of the PRACH resource and a second periodicity of the SSB burst;

[0675] The third periodicity combination is a periodicity of the second type of PRACH resource and a second periodicity of the SSB burst;

[0676] The fourth periodicity combination is a second periodicity of the PRACH resource and a periodicity of the second type of SSB burst;

[0677] The first duration combination is a duration of the second type of PRACH resource and a duration of the second type of SSB burst;

[0678] The second duration combination is a second duration of the PRACH resource and a second duration of the SSB burst;

[0679] The third duration combination is a duration of the second type of PRACH resource and a second duration of the SSB burst;

[0680] The fourth duration combination is a second duration of the PRACH resource and a duration of the second type of SSB burst.

[0681] In some possible examples, one or more of the four codepoints of the indication information indicates that the PRACH resource indication information is a valid value, and one of the four codepoints of the indication information other than the one or more codepoints indicates that the PRACH resource indication information is not a valid value.

[0682] The one or more codepoints further indicate a periodicity of the second type of PRACH resource or a second periodicity of the PRACH resource, or the one or more codepoints further indicate a duration of the second type of PRACH resource or a second duration of the PRACH resource.

[0683] In some possible examples, one or more of the four codepoints of the indication information indicates that the SSB burst indication information is a valid value, and one of the four codepoints of the indication information other than the one or more codepoints indicates that the SSB burst indication information is not a valid value.

[0684] The one or more codepoints further indicate a periodicity of the second type of SSB burst or a second periodicity of the SSB burst, or the one or more codepoints further indicate a duration of the second type of SSB burst or a second duration of the SSB burst.

[0685] In some possible examples, one or more of the eight codepoints of the indication information indicates that both the PRACH resource indication information and the SSB burst indication information are valid values, and one of the eight codepoints of the indication information other than the one or more codepoints indicates that both the PRACH resource indication information and the SSB burst indication information are not valid values.

[0686] The one or more codepoints further indicate one of: a first periodicity combination, a second periodicity combination, a third periodicity combination, or a fourth periodicity combination, or the one or more codepoints further indicate one of: a first duration combination, a second duration combination, a third duration combination, or a fourth duration combination.

[0687] The first periodicity combination is a periodicity of the second type of PRACH resource and a periodicity of the second type of SSB burst.

[0688] The second periodicity combination is a second periodicity of the PRACH resource and a second periodicity of the SSB burst.

[0689] The third periodicity combination is a periodicity of the second type of PRACH resource and a second periodicity of the SSB burst.

[0690] The fourth periodicity combination is a second periodicity of the PRACH resource and a periodicity of the second type of SSB burst.

[0691] The first duration combination is a duration of the second type of PRACH resource and a duration of the second type of SSB burst.

[0692] The second duration combination is a second duration of the PRACH resource and a second duration of the SSB burst.

[0693] The third duration combination is a duration of the second type of PRACH resource and a second duration of the SSB burst.

[0694] The fourth duration combination is a second duration of the PRACH resource and a duration of the second type of SSB burst.

[0695] In some possible examples, one or more of the four code points of the indication information indicates that the PRACH resource indication information is a valid value, and one code point of the four code points of the indication information, except for the one or more code points, indicates that the PRACH resource indication information is not a valid value.

[0696] The one or more code points further indicate a period of the second type of PRACH resource or a second period of the PRACH resource, or the one or more code points further indicate a duration of the second type of PRACH resource or a second duration of the PRACH resource.

[0697] In some possible examples, one or more of the remaining four code points of the indication information indicates that the SSB burst indication information is a valid value, and one code point of the remaining four code points of the indication information, except for the one or more code points, indicates that the SSB burst indication information is not a valid value.

[0698] The one or more code points further indicate a period of the second type of SSB burst or a second period of the SSB burst, or the one or more code points further indicate a duration of the second type of SSB burst or a second duration of the SSB burst.

[0699] In "Embodiment 6", the determining unit 2201 is configured to:

[0700] After the terminal device receives the Msg4, it is determined to terminate using the second type of PRACH resource or the second type of SSB burst, or it is determined that the period of the PRACH resource is changed from the second period to the first period or the period of the SSB burst is changed from the second period to the first period.

[0701] In this way, after the terminal device receives the Msg4, the communication apparatus 2200 can use the RRC configuration in the Msg4 to set the properties of the second type of PRACH resource or the periodic update of the PRACH resource, and / or after the terminal device receives the Msg4, the communication apparatus 2200 can use the RRC configuration in the Msg4 to set the properties of the second type of SSB burst or the periodic update of the SSB burst, so as to terminate or give up the second type of PRACH resource or the second type of SSB burst triggered by the UL WUS, indicated by the PEI, indicated by the paging, or indicated by the RAR, or determine that the period of the PRACH resource is changed from the second period to the first period or the period of the SSB burst is changed from the second period to the first period.

[0702] Another communication apparatus of the embodiment is exemplarily illustrated below.

[0703] The above mainly introduces the embodiments of the present application from the method side. It can be understood that, in order to implement the above functions, the network device comprises a hardware structure and / or a software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of the examples described in the embodiments disclosed in the present application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is implemented in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0704] The embodiments of the present application can divide the functional units of the network device according to the above method examples. For example, each functional unit can be divided corresponding to each function, or two or more functions can be integrated in one processing unit. The integrated unit can be implemented in the form of hardware or in the form of a software program module. It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical functional division, and actual implementation can have another division manner.

[0705] In the case of integrated units, FIG. 23 is a functional unit composition block diagram of another communication apparatus of the embodiments of the present application. The communication apparatus 2300 comprises a determination unit 2301.

[0706] Optionally, the determination unit 2301 can be a module unit for processing signals, data, information, sequences, etc., without specific limitation.

[0707] Optionally, the determination unit 2301 can be integrated in a processing unit.

[0708] It should be noted that the processing unit can be a processor or a controller, for example, can be a baseband processor, a baseband chip, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in combination with the disclosure of the present application. The processing unit can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0709] Optionally, the communication apparatus 2300 can further include a storage unit for storing computer program codes or instructions executed by the communication apparatus 2300. The storage unit can be a memory.

[0710] Optionally, the communication apparatus 2300 can be a chip or a chip module.

[0711] Optionally, the determining unit 2301 is configured to perform any of the steps performed by the chip / chip module / terminal device, etc. in the above method embodiments. Details are as follows.

[0712] In "Embodiment 1", the determining unit 2301 is configured to:

[0713] If the network device receives the uplink wake-up signal at the mth millisecond, time slot or symbol, it is determined that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or it is determined that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0714] It can be seen that since the communication apparatus 2300 determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or the communication apparatus 2300 determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the network device can receive the second type of PRACH or receive the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from receiving less PRACH to receiving more PRACH, thereby realizing adaptive reception of PRACH.

[0715] In "Case One" of "Embodiment 2", the determining unit 2301 is configured to:

[0716] If the network device has finished sending the PEI at the mth millisecond, time slot or symbol, and the PRACH resource indication information in the PEI is a valid value, it is determined that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or it is determined that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0717] It can be seen that, since the communication apparatus 2300 determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or the communication apparatus 2300 determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the communication apparatus 2300 can receive the second type of PRACH or receive the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally receiving less PRACH to receiving more PRACH, thereby realizing adaptive reception of the PRACH.

[0718] In "Case Two" of "Embodiment 2", the determining unit 2301 is configured to:

[0719] If the network device has finished sending the PEI at the mth millisecond, time slot or symbol, and the SSB burst indication information in the PEI is a valid value, it is determined that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol, or it is determined that the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0720] It can be seen that, since the communication apparatus 2300 determines that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol or the communication apparatus 2300 determines that the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the communication apparatus 2300 can send the second type of SSB or send the SSB according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally sending less SSB to sending more SSB, thereby achieving adaptive sending of SSB. In addition, since the (m+d)th millisecond, time slot or symbol is more likely to be before the PF or PO associated with the PEI, the communication apparatus 2300 can send the second type of SSB burst or the SSB burst of the second period before the PF / PO, so that the communication apparatus 2300 can perform downlink time-frequency synchronization with the terminal device and start sending paging as soon as possible.

[0721] In “Case Three” of “Embodiment 2”, the determining unit 2301 is configured to:

[0722] If the network device sends the PEI and the SSB burst indication information in the PEI is a valid value, the second type of SSB burst is determined to be valid after the first start frame or the period of the SSB burst is determined to be changed from the first period to the second period after the first start frame.

[0723] It can be seen that, since the communication apparatus 2300 determines that the period of the SSB burst is changed from the first period to the second period after the first start frame, the communication apparatus 2300 can send the second type of SSB or receive the SSB according to the second period after the first start frame, so as to change from originally sending less SSB to sending more SSB, thereby achieving adaptive sending of SSB. In addition, since the first start frame is a start frame in a paging cycle in which the PF associated with the PEI is located, the communication apparatus 2300 can perform downlink time-frequency synchronization with the terminal device and start sending paging as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0724] In “Case One” of “Embodiment 3”, the determining unit 2301 is configured to:

[0725] If the network device sends the paging on the mth millisecond, time slot or symbol and the PRACH resource indication information in the paging is a valid value, the second type of PRACH resource is determined to be valid after the (m+d)th millisecond, time slot or symbol or the period of the PRACH resource is determined to be changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0726] It can be seen that, since the communication apparatus 2300 determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol or the communication apparatus 2300 determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the communication apparatus 2300 can receive the second type of PRACH or receive the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally receiving less PRACH to receiving more PRACH, thereby achieving adaptive reception of the PRACH.

[0727] In "Case 2" of "Embodiment 3", the determining unit 2301 is configured to:

[0728] If the network device has finished sending the paging at the mth millisecond, time slot or symbol, and the SSB burst indication information in the paging is a valid value, it is determined that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol or the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0729] It can be seen that, since the communication apparatus 2300 determines that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol or the communication apparatus 2300 determines that the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the communication apparatus 2300 can send the second type of SSB or send the SSB according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally sending less SSB to sending more SSB, thereby achieving adaptive sending of the SSB. In addition, since the (m+d)th millisecond, time slot or symbol is more likely to be before the time domain position of the PRACH resource, the communication apparatus 2300 can send the second type of SSB burst or the SSB burst of the second period before the time domain position of the PRACH resource, so that the communication apparatus 2300 can perform downlink time-frequency synchronization with the terminal device as soon as possible and start receiving the PRACH as soon as possible through the second type of SSB burst or the SSB burst of the second period.

[0730] In "Case 3" of "Embodiment 3", the determining unit 2301 is configured to:

[0731] If the network device has finished sending the paging, and the SSB burst indication information in the paging is a valid value, it is determined that the second type of SSB burst is valid after the second start frame or the period of the SSB burst is changed from the first period to the second period after the second start frame.

[0732] It can be seen that, since the communication apparatus 2300 determines that the period of the SSB burst is changed from the first period to the second period after the first starting frame, the communication apparatus 2300 can transmit the second type of SSB or receive the SSB according to the second period after the first starting frame, so as to change from originally transmitting fewer SSBs to transmitting more SSBs, thereby realizing adaptive transmission of SSBs. In addition, since the second starting frame is a starting frame in the paging cycle in which the PF of the paging is located, the communication apparatus 2300 can perform downlink time-frequency synchronization with the terminal device as soon as possible through the second type of SSB burst or the SSB burst according to the second period.

[0733] In “Embodiment 4”, the determining unit 2301 is configured to:

[0734] If the network device transmits the RAR on the mth millisecond, time slot or symbol, and the SSB burst indication information in the RAR is a valid value, it is determined that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol, or it is determined that the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0735] It can be seen that, since the communication apparatus 2300 determines that the second type of SSB burst is valid after the (m+d)th millisecond, time slot or symbol, or the communication apparatus 2300 determines that the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the communication apparatus 2300 can transmit the second type of SSB or transmit the SSB according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from originally transmitting fewer SSBs to transmitting more SSBs, thereby realizing adaptive transmission of SSBs. In addition, since the (m+d)th millisecond, time slot or symbol is before the Msg4 or the Msg3, the communication apparatus 2300 can transmit the second type of SSB burst or the SSB burst according to the second period before the Msg4 or the Msg3, so that the communication apparatus 2300 can perform downlink time-frequency synchronization with the terminal device as soon as possible and start transmitting the Msg4 or start receiving the Msg3 as soon as possible through the second type of SSB burst or the SSB burst according to the second period.

[0736] In “Case a” of “Embodiment 5”, the determining unit 2301 is configured to:

[0737] The indication information indicates that the PRACH resource indication information is or is not a valid value and the SSB burst indication information is or is not a valid value.

[0738] In this way, the PRACH resource indication information and the SSB burst indication information are indicated as valid values by network indication or network configuration through indication information.

[0739] In "Embodiment 6", the determining unit 2301 is configured to:

[0740] After the network device sends the Msg4, the determining unit 2301 is configured to determine to terminate the second type of PRACH resource or the second type of SSB burst, or determine to change the period of the PRACH resource from the second period to the first period or the period of the SSB burst from the second period to the first period.

[0741] In this way, after the network device sends the Msg4, the communication apparatus 2300 can set the properties of the second type of PRACH resource or the period update of the PRACH resource by using the RRC configuration in the Msg4, and / or the communication apparatus 2300 can set the properties of the second type of SSB burst or the period update of the SSB burst by using the RRC configuration in the Msg4, so as to terminate or give up the second type of PRACH resource or the second type of SSB burst triggered by the UL WUS, indicated by the PEI, indicated by the paging, or indicated by the RAR, or determine to change the period of the PRACH resource from the second period to the first period or the period of the SSB burst from the second period to the first period.

[0742] The following is an example of a terminal device of the present embodiment.

[0743] Referring to FIG. 24, FIG. 24 is a structural schematic diagram of a terminal device of an embodiment of the present application. The terminal device 2400 can include a processor 2410, a memory 2420, and a communication bus for connecting the processor 2410 and the memory 2420.

[0744] Optionally, the memory 2420 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), or a compact disc read-only memory (CD-ROM). The memory 2420 is used to store program codes executed by the terminal device 2400 and transmitted data.

[0745] Optionally, the terminal device 2400 further includes a communication interface for receiving and sending data.

[0746] Optionally, the processor 2410 can be one or more central processing units (CPUs), in the case of the processor 2410 being a central processing unit (CPU), the central processing unit (CPU) can be a single core central processing unit (CPU) or a multi-core central processing unit (CPU).

[0747] Optionally, the processor 2410 can be a baseband chip, a chip, a central processing unit (CPU), a general processor, a DSP, an ASIC, an FPGA, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof.

[0748] In a specific implementation, the processor 2410 in the terminal device 2400 is configured to execute the computer programs or instructions 2421 stored in the memory 2420, and perform the corresponding steps of the method embodiments described above. Since the above application relates to multiple manners, the following will be described in detail from each manner.

[0749] In "Embodiment 1", the processor 2410 in the terminal device 2400 is configured to execute the computer programs or instructions 2421 stored in the memory 2420, and perform the following steps:

[0750] If the uplink wake-up signal is sent on the mth millisecond, time slot or symbol, the terminal device determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or determines that the period of the PRACH resource changes from the first period to the second period after the (m+d)th millisecond, time slot or symbol, m is a positive integer, and d is an integer greater than or equal to 0.

[0751] It can be seen that since the terminal device determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot or symbol, or the terminal device determines that the period of the PRACH resource changes from the first period to the second period after the (m+d)th millisecond, time slot or symbol, the terminal device can send the second type of PRACH or send the PRACH according to the second period after the (m+d)th millisecond, time slot or symbol, so as to change from sending less PRACH to sending more PRACH, thereby realizing adaptive sending of PRACH.

[0752] In "Case One" of "Embodiment 2", the processor 2410 in the terminal device 2400 is configured to execute the computer programs or instructions 2421 stored in the memory 2420, and perform the following steps:

[0753] If the PEI is received at the mth millisecond, time slot or symbol, and the PRACH resource indication information in the PEI is a valid value, then the second type of PRACH resource is determined to be valid after the (m+d)th millisecond, time slot or symbol, or the period of the PRACH resource is changed from the first period...

Claims

1. A communication method, characterized in that, Applied to terminal devices; the method includes: If the terminal device finishes sending the uplink wake-up signal in the m-th millisecond, time slot, or symbol, then it determines that the second type of physical random access channel (PRACH) resource is valid after the (m+d)-th millisecond, time slot, or symbol, or determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)-th millisecond, time slot, or symbol, where m is a positive integer and d is an integer greater than or equal to 0.

2. A communication method, characterized in that, Applied to network devices; the method includes: If the network device receives an uplink wake-up signal in the m-th millisecond, time slot, or symbol, it determines that the second type of PRACH resource is valid after the (m+d)-th millisecond, time slot, or symbol, or determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)-th millisecond, time slot, or symbol, where m is a positive integer and d is an integer greater than or equal to 0.

3. The method according to claim 1 or 2, characterized in that, The uplink wake-up signal is one or more specific preambles within a first type of PRACH resource, where the period of the first type of PRACH resource is greater than the period of the second type of PRACH resource; or, The uplink wake-up signal is one or more specific preambles within the PRACH resource of the first period.

4. A communication method, characterized in that, Applied to terminal devices; the method includes: If the terminal device receives a Paging Advance Indication (PEI) on the m-th millisecond, time slot, or symbol, and the PRACH resource indication information within the PEI is valid, then after the (m+d)-th millisecond, time slot, or symbol, it determines that the second type of PRACH resource is valid, or after the (m+d)-th millisecond, time slot, or symbol, it determines that the period of the PRACH resource is changed from the first period to the second period, where m is a positive integer and d is an integer greater than or equal to 0; or, If the terminal device receives a PEI in the m-th millisecond, time slot, or symbol, and the SSB burst indication information within the PEI is valid, then after the (m+d)-th millisecond, time slot, or symbol, it determines that the second type of SSB burst is valid, or after the (m+d)-th millisecond, time slot, or symbol, it determines that the period of the SSB burst is changed from the first period to the second period, where m is a positive integer and d is an integer greater than or equal to 0; or, If the terminal device receives a PEI and the SSB burst indication information in the PEI is valid, then it determines that the second type of SSB burst is valid after the first start frame, or it determines that the period of the SSB burst is changed from the first period to the second period after the first start frame. The first start frame is the start frame in the paging period where the paging frame PF associated with the PEI is located.

5. A communication method, characterized in that, Applied to network devices; the method includes: The network device determines that the PRACH resource indication information within the PEI is valid and transmits the PEI. If the network device completes transmitting the PEI in the m-th millisecond, time slot, or symbol, it determines that the second type of PRACH resource is valid after the (m+d)-th millisecond, time slot, or symbol, or determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)-th millisecond, time slot, or symbol; or, The network device determines that the SSB burst indication information within the PEI is valid and transmits the PEI. If the network device completes transmitting the PEI in the m-th millisecond, time slot, or symbol, it determines that the second type of SSB burst is valid after the (m+d)-th millisecond, time slot, or symbol, or determines that the period of the SSB burst changes from the first period to the second period after the (m+d)-th millisecond, time slot, or symbol; or, The network device determines that the SSB burst indication information in the PEI is valid and sends the PEI. If the network device has finished sending the PEI, it determines that the second type of SSB burst is valid after the first start frame, or determines that the period of the SSB burst is changed from the first period to the second period after the first start frame. The first start frame is the start frame in the paging period of the PF associated with the PEI.

6. A communication method, characterized in that, Applied to terminal devices; the method includes: If the terminal device receives a paging message in the m-th millisecond, time slot, or symbol, and the PRACH resource indication information within the paging message is valid, then after the (m+d)-th millisecond, time slot, or symbol, it determines that the second type of PRACH resource is valid, or after the (m+d)-th millisecond, time slot, or symbol, it determines that the period of the PRACH resource is changed from the first period to the second period, where m is a positive integer and d is an integer greater than or equal to 0; or, If the terminal device receives a paging message in the m-th millisecond, time slot, or symbol, and the SSB burst indication information within the paging message is valid, then after the (m+d)-th millisecond, time slot, or symbol, it determines that the second type of SSB burst is valid; or after the (m+d)-th millisecond, time slot, or symbol, it determines that the period of the SSB burst is changed from the first period to the second period, where m is a positive integer and d is an integer greater than or equal to 0; or... If the terminal device receives a paging and the SSB burst indication information in the paging is a valid value, then after the second start frame, it is determined that the second type of SSB burst is valid, or after the second start frame, it is determined that the period of the SSB burst is changed from the first period to the second period. The second start frame is the start frame in the paging period where the paging frame PF associated with the paging is located.

7. A communication method, characterized in that, Applied to network devices; the method includes: The network device determines that the PRACH resource indication information within the paging is valid and sends the paging; if the network device finishes sending the paging in the m-th millisecond, time slot, or symbol, then after the (m+d)-th millisecond, time slot, or symbol, it determines that the second type of PRACH resource is valid, or after the (m+d)-th millisecond, time slot, or symbol, it determines that the period of the PRACH resource is changed from the first period to the second period, where m is a positive integer and d is an integer greater than or equal to 0; or, The network device determines that the SSB burst indication information within the paging is valid and sends the paging; if the network device finishes sending the paging in the m-th millisecond, time slot, or symbol, then after the (m+d)-th millisecond, time slot, or symbol, it determines that the second type of SSB burst is valid, or after the (m+d)-th millisecond, time slot, or symbol, it determines that the period of the SSB burst changes from the first period to the second period, where m is a positive integer and d is an integer greater than or equal to 0; or, The network device determines that the SSB burst indication information in the paging is valid and sends the paging; if the network device has sent the paging and the SSB burst indication information in the paging is valid, then after the second start frame, it determines that the second type of SSB burst is valid, or after the second start frame, it determines that the period of the SSB burst is changed from the first period to the second period, and the second start frame is the start frame in the paging period where the PF associated with the paging is located.

8. The method according to claim 6 or 7, characterized in that, The PRACH resource indication information occupies reserved bits in the paging, or the PRACH resource indication information occupies remaining bits in the short message within the paging; or, The SSB burst indication information occupies reserved bits in the paging, or the SSB burst indication information occupies remaining bits in the short message in the paging.

9. A communication method, characterized in that, Applied to terminal devices; the method includes: If the terminal device receives a Random Access Response (RAR) on the m-th millisecond, time slot, or symbol, and the SSB burst indication information in the RAR is a valid value, then it determines that the second type of SSB burst is valid after the (m+d)-th millisecond, time slot, or symbol, or determines that the period of the SSB burst is changed from the first period to the second period after the (m+d)-th millisecond, time slot, or symbol, where m is a positive integer and d is an integer greater than or equal to 0.

10. A communication method, characterized in that, Applied to network devices; the method includes: The network device determines that the SSB burst indication information in the RAR is valid and sends the RAR. If the network device finishes sending the RAR in the m-th millisecond, time slot, or symbol, it determines that the second type of SSB burst is valid after the (m+d)-th millisecond, time slot, or symbol, or determines that the period of the SSB burst is changed from the first period to the second period after the (m+d)-th millisecond, time slot, or symbol, where m is a positive integer and d is an integer greater than or equal to 0.

11. A communication method, characterized in that, Applied to terminal devices; including: Receive indication information, which indicates that the PRACH resource indication information is or is not a valid value and the SSB burst indication information is or is not a valid value.

12. A communication method, characterized in that, Applied to network devices; including: Send indication information, which indicates that the PRACH resource indication information is or is not a valid value and the SSB burst indication information is or is not a valid value.

13. The method according to claim 11 or 12, characterized in that, One code point of the indication information indicates that both the PRACH resource indication information and the SSB burst indication information are valid values; Another code point in the indication information indicates that the PRACH resource indication information is a valid value and the SSB burst indication information is not a valid value.

14. The method according to claim 11 or 12, characterized in that, The first code point among the four code points of the indication information indicates that both the PRACH resource indication information and the SSB burst indication information are valid values; The second code point among the four code points of the indication information indicates that the PRACH resource indication information is a valid value and the SSB burst indication information is not a valid value; The third code point among the four code points of the indication information indicates that the PRACH resource indication information is not a valid value and the SSB burst indication information is a valid value; The fourth code point of the four code points in the indication information indicates that both the PRACH resource indication information and the SSB burst indication information are invalid values.

15. The method according to claim 11 or 12, characterized in that, One or more of the four code points of the indication information indicate that both the PRACH resource indication information and the SSB burst indication information are valid values; one code point other than the one or more code points of the indication information indicates that both the PRACH resource indication information and the SSB burst indication information are invalid values. The one or more code points also indicate one of the following: a first cycle combination, a second cycle combination, a third cycle combination, or a fourth cycle combination; or the one or more code points also indicate one of the following: a first duration combination, a second duration combination, a third duration combination, or a fourth duration combination. Wherein, the first period combination is the period of the second type of PRACH resource and the period of the second type of SSB burst; The second cycle combination is the second cycle of the PRACH resource and the second cycle of the SSB burst; The third cycle combination is the cycle of the second type of PRACH resource and the second cycle of the SSB burst; The fourth cycle combination is the cycle of the second cycle of the PRACH resource and the cycle of the second type of SSB burst; The first duration combination is the duration of the second type of PRACH resource and the duration of the second type of SSB burst; The second duration combination is the second duration of the PRACH resource and the second duration of the SSB burst; The third duration combination is the duration of the second type of PRACH resource and the second duration of the SSB burst; The fourth duration combination is the second duration of the PRACH resource and the duration of the second type of SSB burst.

16. The method according to claim 11 or 12, characterized in that, One or more of the four code points of the indication information indicate that the PRACH resource indication information is a valid value, and one code point other than the one or more code points of the indication information indicates that the PRACH resource indication information is not a valid value. The one or more code points may also indicate the period of a second type of PRACH resource or a second period of a PRACH resource, or the one or more code points may also indicate the duration of a second type of PRACH resource or a second duration of a PRACH resource.

17. The method according to claim 11 or 12, characterized in that, One or more of the four code points of the indication information indicate that the SSB burst indication information is a valid value, and one code point other than the one or more code points of the four code points of the indication information indicates that the SSB burst indication information is not a valid value. The one or more code points also indicate the period of a second type of SSB burst or a second period of an SSB burst, or the one or more code points also indicate the duration of a second type of SSB burst or a second duration of an SSB burst.

18. The method according to claim 11 or 12, characterized in that, One or more of the eight code points in the indication information indicate that both the PRACH resource indication information and the SSB burst indication information are valid values; one code point in the eight code points of the indication information, excluding the one or more code points, indicates that both the PRACH resource indication information and the SSB burst indication information are invalid values. The one or more code points also indicate one of the following: a first cycle combination, a second cycle combination, a third cycle combination, or a fourth cycle combination; or the one or more code points also indicate one of the following: a first duration combination, a second duration combination, a third duration combination, or a fourth duration combination. Wherein, the first period combination is the period of the second type of PRACH resource and the period of the second type of SSB burst; The second cycle combination is the second cycle of the PRACH resource and the second cycle of the SSB burst; The third cycle combination is the cycle of the second type of PRACH resource and the second cycle of the SSB burst; The fourth cycle combination is the cycle of the second cycle of the PRACH resource and the cycle of the second type of SSB burst; The first duration combination is the duration of the second type of PRACH resource and the duration of the second type of SSB burst; The second duration combination is the second duration of the PRACH resource and the second duration of the SSB burst; The third duration combination is the duration of the second type of PRACH resource and the second duration of the SSB burst; The fourth duration combination is the second duration of the PRACH resource and the duration of the second type of SSB burst.

19. The method according to claim 11 or 12, characterized in that, One or more of the four code points of the indication information indicate that the PRACH resource indication information is a valid value, and one code point other than the one or more code points of the indication information indicates that the PRACH resource indication information is not a valid value. The one or more code points may also indicate the period of a second type of PRACH resource or a second period of a PRACH resource, or the one or more code points may also indicate the duration of a second type of PRACH resource or a second duration of a PRACH resource.

20. The method according to claim 11 or 12, characterized in that, One or more of the remaining four code points of the indication information indicate that the SSB burst indication information is a valid value, and one code point other than the one or more code points of the remaining four code points of the indication information indicates that the SSB burst indication information is not a valid value. The one or more code points also indicate the period of a second type of SSB burst or a second period of an SSB burst, or the one or more code points also indicate the duration of a second type of SSB burst or a second duration of an SSB burst.

21. A communication method, characterized in that, Applied to terminal devices; the method includes: After receiving message 4Msg4, the terminal device determines to terminate the use of the second type of PRACH resource or the second type of SSB burst indication information, or determines to change the period of the PRACH resource from the second period to the first period or the period of the SSB burst from the second period to the first period.

22. A communication method, characterized in that, Applied to network devices; the method includes: After the network device sends Msg4, it determines to terminate the use of Type 2 PRACH resources or Type 2 SSB bursts, or determines to change the period of PRACH resources from the second period to the first period or the period of SSB bursts from the second period to the first period.

23. A communication device, characterized in that, include: The determining unit is configured to determine that the second type of physical random access channel (PRACH) resource is valid after the (m+d)th millisecond, time slot, or symbol if the uplink wake-up signal has been transmitted in the mth millisecond, time slot, or symbol, or to determine that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot, or symbol, where m is a positive integer and d is an integer greater than or equal to 0.

24. A communication device, characterized in that, include: The determining unit is configured to determine that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot, or symbol if an uplink wake-up signal is received on the mth millisecond, time slot, or symbol, or to determine that the period of the PRACH resource is changed from the first period to the second period after the (m+d)th millisecond, time slot, or symbol, where m is a positive integer and d is an integer greater than or equal to 0.

25. A communication device, characterized in that, include: The determining unit is configured to, if a Paging Advance Indication (PEI) is received on the m-th millisecond, time slot, or symbol, and the PRACH resource indication information within the PEI is a valid value, then determine that the second type of PRACH resource is valid after the (m+d)-th millisecond, time slot, or symbol; or determine that the period of the PRACH resource is changed from the first period to the second period after the (m+d)-th millisecond, time slot, or symbol, where m is a positive integer and d is an integer greater than or equal to 0; or, The determining unit is configured to, if a PEI is received in the m-th millisecond, time slot, or symbol, and the SSB burst indication information within the PEI is valid, then determine that the second type of SSB burst is valid after the (m+d)-th millisecond, time slot, or symbol; or determine that the period of the SSB burst is changed from the first period to the second period after the (m+d)-th millisecond, time slot, or symbol, where m is a positive integer and d is an integer greater than or equal to 0; or... The determining unit is configured to, if a PEI is received and the SSB burst indication information within the PEI is a valid value, determine that the second type of SSB burst is valid after the first start frame, or determine that the period of the SSB burst is changed from the first period to the second period after the first start frame, wherein the first start frame is the start frame within the paging period of the paging frame PF associated with the PEI.

26. A communication device, characterized in that, include: The determining unit is used to determine that the PRACH resource indication information in the PEI is a valid value, and to send the PEI; If the network device finishes transmitting the PEI in the m-th millisecond, time slot, or symbol, then it determines that the second type of PRACH resource is valid after the (m+d)-th millisecond, time slot, or symbol, or it determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)-th millisecond, time slot, or symbol, where m is a positive integer and d is an integer greater than or equal to 0; or, A determining unit is configured to determine that the SSB burst indication information within the PEI is a valid value, and to transmit the PEI; if the network device completes the transmission of the PEI in the m-th millisecond, time slot, or symbol, then after the (m+d)-th millisecond, time slot, or symbol, it determines that the second type of SSB burst is valid, or after the (m+d)-th millisecond, time slot, or symbol, it determines that the period of the SSB burst changes from the first period to the second period, where m is a positive integer and d is an integer greater than or equal to 0; or, The determining unit is used to determine that the SSB burst indication information in the PEI is a valid value, and to send the PEI; if the network device has finished sending the PEI, it determines that the second type of SSB burst is valid after the first start frame, or determines that the period of the SSB burst is changed from the first period to the second period after the first start frame, wherein the first start frame is the start frame in the paging period of the PF associated with the PEI.

27. A communication device, characterized in that, include: The determining unit is configured to, if a paging is received on the m-th millisecond, time slot, or symbol, and the PRACH resource indication information within the paging is a valid value, determine that the second type of PRACH resource is valid after the (m+d)-th millisecond, time slot, or symbol; or determine that the period of the PRACH resource is changed from the first period to the second period after the (m+d)-th millisecond, time slot, or symbol, where m is a positive integer and d is an integer greater than or equal to 0; or, The determining unit is configured to, if a paging is received on the m-th millisecond, time slot, or symbol, and the synchronization signal block burst (SSB) burst indication information within the paging is valid, then determine that the second type of SSB burst is valid after the (m+d)-th millisecond, time slot, or symbol; or determine that the period of the SSB burst is changed from the first period to the second period after the (m+d)-th millisecond, time slot, or symbol, where m is a positive integer and d is an integer greater than or equal to 0; or, The determining unit is configured to, if a paging is received and the SSB burst indication information in the paging is a valid value, determine that the second type of SSB burst is valid after the second start frame, or determine that the period of the SSB burst is changed from the first period to the second period after the second start frame, wherein the second start frame is the start frame in the paging period where the paging frame PF associated with the paging is located.

28. A communication device, characterized in that, include: A determining unit is used to determine that the PRACH resource indication information in the paging is a valid value, and to send the paging; If the network device completes sending the paging in the m-th millisecond, time slot, or symbol, then it determines that the second type of PRACH resource is valid after the (m+d)-th millisecond, time slot, or symbol; or it determines that the period of the PRACH resource is changed from the first period to the second period after the (m+d)-th millisecond, time slot, or symbol, where m is a positive integer and d is an integer greater than or equal to 0; or, A determining unit is configured to determine that the SSB burst indication information within the paging is a valid value, and to send the paging; if the network device completes sending the paging in the m-th millisecond, time slot, or symbol, then after the (m+d)-th millisecond, time slot, or symbol, it determines that the second type of SSB burst is valid, or after the (m+d)-th millisecond, time slot, or symbol, it determines that the period of the SSB burst changes from the first period to the second period, where m is a positive integer and d is an integer greater than or equal to 0; or, The determining unit is used to determine that the SSB burst indication information in the paging is a valid value, and to send the paging; if the network device has finished sending the paging and the SSB burst indication information in the paging is a valid value, then after the second start frame, it determines that the second type of SSB burst is valid, or after the second start frame, it determines that the period of the SSB burst is changed from the first period to the second period, and the second start frame is the start frame in the paging period where the PF associated with the paging is located.

29. A communication device, characterized in that, include: The determining unit is configured to determine that a second type of SSB burst is valid after the (m+d)th millisecond, time slot, or symbol if a Random Access Response (RAR) is received on the mth millisecond, time slot, or symbol, and the SSB burst indication information in the RAR is a valid value; or to determine that the period of the SSB burst is changed from the first period to the second period after the (m+d)th millisecond, time slot, or symbol, where m is a positive integer and d is an integer greater than or equal to 0.

30. A communication device, characterized in that, include: A determining unit is used to determine that the SSB burst indication information in the RAR is a valid value, and to send the RAR; If the network device finishes transmitting the RAR in the m-th millisecond, time slot, or symbol, then it determines that the second type of SSB burst is valid after the (m+d)-th millisecond, time slot, or symbol, or determines that the period of the SSB burst changes from the first period to the second period after the (m+d)-th millisecond, time slot, or symbol, where m is a positive integer and d is an integer greater than or equal to 0.

31. A communication device, characterized in that, include: A determining unit is configured to receive indication information, wherein the indication information indicates that the PRACH resource indication information is or is not a valid value and the SSB burst indication information is or is not a valid value.

32. A communication device, characterized in that, include: A determining unit is used to send indication information, wherein the indication information indicates that the PRACH resource indication information is or is not a valid value and the SSB burst indication information is or is not a valid value.

33. A communication device, characterized in that, include: The determining unit is configured to, upon receiving message 4Msg4, determine whether to terminate the use of type 2 PRACH resources or type 2 SSB burst indication information, or to determine whether the period of the PRACH resources is changed from the second period to the first period or the period of the SSB burst is changed from the second period to the first period.

34. A communication device, characterized in that, include: The determining unit is configured to, after sending to Msg4, determine whether to terminate the use of Type II PRACH resources or Type II SSB bursts, or to determine whether the period of the PRACH resources is changed from the second period to the first period or the period of the SSB burst is changed from the second period to the first period.

35. A terminal device, comprising a processor, a memory, and a computer program or instructions stored in the memory, characterized in that, The processor executes the computer program or instructions to implement the steps of the method according to any one of claims 1, 3, 4, 6, 8, 9, 11, 13-21.

36. A network device, comprising a processor, a memory, and a computer program or instructions stored in the memory, characterized in that, The processor executes the computer program or instructions to implement the steps of the method according to any one of claims 2, 3, 5, 7, 8, 10, 12-20, or 22.

37. A chip, comprising a processor and a communication interface, characterized in that, The processor performs the steps of the method according to any one of claims 1-22.

38. A computer-readable storage medium, characterized in that, It stores a computer program or instructions that, when executed, implement the steps of the method described in any one of claims 1-22.

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