Communication method and device, terminal equipment and network equipment

Abstract

The invention discloses a communication method and device, terminal equipment and network equipment, and relates to the technical field of communication. The method comprises the following steps: if the terminal equipment finishes sending an uplink wake-up signal on the mth millisecond, time slot or symbol, determining that a second type of PRACH resources is valid after the (m + d) th millisecond, time slot or symbol, or determining that the period of the PRACH resources is changed from a first period to a second period after the (m + d) th millisecond, time slot or symbol. Visibly, since the second type of PRACH resource is determined to be effective or the period of the PRACH resource is determined to be changed from the first period to the second period, the terminal device can send the second type of PRACH or send the PRACH according to the second period so as to send more PRACHs, thereby realizing self-adaptive PRACH sending and further realizing power consumption saving through self-adaptive PRACH sending.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a communication method and apparatus, terminal equipment and network equipment. Background Technology

[0002] In communication systems, when terminal devices need to synchronize their time and frequency or access a network, the transmission of relevant signals / channels is involved. For example, network devices may need to send a synchronization signal block (SSB) to the terminal device to achieve time and frequency synchronization. Similarly, terminal devices may need to send a physical random access channel (PRACH) to the network device to access the network. However, these signal / channel transmission processes often consume power from both the network device and the terminal device.

[0003] Currently, network energy savings (or network power saving) is a major concern for both operators and equipment manufacturers, as it offers significant benefits for reducing operating costs and promoting environmental sustainability. Therefore, further research is needed on how to optimize signal / channel transmission to minimize power consumption under network energy-saving principles. Summary of the Invention

[0004] This application provides a communication method and apparatus, a terminal device and a network device, which aim to achieve adaptive transmission PRACH or adaptive transmission SSB in order to save power consumption.

[0005] Firstly, a communication method according to this application, applied to a terminal device, includes:

[0006] 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 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.

[0007] As can be seen, since the validity of the second type of PRACH resource is determined after the (m+d)th millisecond, time slot, or symbol, or the period for determining 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 PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows the device to change from sending fewer PRACHs to sending more PRACHs, thereby achieving adaptive PRACH transmission and saving power through adaptive PRACH transmission.

[0008] In some possible examples, the uplink wake-up signal is one or more specific preambles within a first-type PRACH resource, the period of which is greater than the period of a second-type PRACH resource; or,

[0009] The uplink wake-up signal is one or more specific preambles within a PRACH resource with a first cycle.

[0010] Secondly, this application provides a communication method applied to a network device, comprising:

[0011] If a 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.

[0012] As can be seen, since the validity of the second type of PRACH resource is determined after the (m+d)th millisecond, time slot, or symbol, or the period for determining 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 PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows the device to change from receiving fewer PRACHs to receiving more PRACHs, thereby achieving adaptive PRACH reception and saving power through adaptive PRACH reception.

[0013] Thirdly, a communication method according to this application, applied to a terminal device, includes:

[0014] If the terminal device receives a PEI in the m-th millisecond, time slot, or symbol, and the PRACH resource indication information in the PEI is a valid value, 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.

[0015] As can be seen, since the validity of the second type of PRACH resource is determined after the (m+d)th millisecond, time slot, or symbol, or the period for determining 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 PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows the device to change from sending fewer PRACHs to sending more PRACHs, thereby achieving adaptive PRACH transmission and saving power through adaptive PRACH transmission.

[0016] Fourthly, a communication method according to this application, applied to a network device, includes:

[0017] The PRACH resource indication information within the PEI is determined to be a valid value, and the PEI is sent. If the network device finishes sending the PEI in the m-th 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 be 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.

[0018] As can be seen, since the validity of the second type of PRACH resource is determined after the (m+d)th millisecond, time slot, or symbol, or the period for determining 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 PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows the device to change from receiving fewer PRACHs to receiving more PRACHs, thereby achieving adaptive PRACH reception and saving power through adaptive PRACH reception.

[0019] Fifthly, a communication method according to this application, applied to a terminal device, includes:

[0020] If the terminal device receives a PEI in the m-th millisecond, time slot, or symbol, 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 (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.

[0021] As can be seen, since the validity of the second type SSB burst is determined after the (m+d)th millisecond, time slot, or symbol, or the period for determining the SSB burst changes from the first period to the second period, the terminal device can receive the second type SSB or receive SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows it to change from receiving fewer SSBs to receiving more SSBs, thus achieving adaptive SSB reception. Furthermore, since the (m+d)th millisecond, time slot, or symbol is highly likely to occur before the paging frame (PF) or paging occasion (PO) associated with the PEI, the terminal device can receive the second type SSB burst or the second period SSB burst before the PF / PO. Therefore, the terminal device can achieve downlink time-frequency synchronization and begin paging reception as quickly as possible using the second type SSB burst or the second period SSB burst.

[0022] Sixthly, a communication method according to this application, applied to a network device, includes:

[0023] The SSB burst indication information within the PEI is determined to be valid, and the PEI is transmitted. If the network device transmits the PEI in the m-th 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 change 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.

[0024] As can be seen, since the period for determining the validity of the second type SSB burst after the (m+d)th millisecond, time slot, or symbol changes from the first period to the second period, the network device can send the second type SSB or send SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows the network device to switch from sending fewer SSBs to sending more, thus achieving adaptive SSB transmission. Furthermore, since the (m+d)th millisecond, time slot, or symbol is highly likely to occur before the PF or PO associated with the PEI, the network device can send the second type SSB burst or the second period SSB burst before the PF / PO. This allows the network device to quickly synchronize downlink time and frequency with the terminal device and begin paging as soon as possible.

[0025] The seventh aspect is a communication method of this application, applied to a terminal device, comprising:

[0026] 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 determines that the period of the SSB burst is changed from the first period to the second period after the first start frame.

[0027] As can be seen, since the period for determining the SSB burst changes 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 SSBs according to the second period after the first start frame, thus changing from receiving fewer SSBs to receiving more SSBs, thereby achieving adaptive SSB reception. Furthermore, since the first start frame is the start frame within the paging period of the PF associated with the PEI, the terminal device can quickly achieve downlink time-frequency synchronization and begin paging reception as soon as possible through the second type of SSB burst or the second period's SSB burst.

[0028] Eighthly, a communication method according to this application, applied to a network device, includes:

[0029] If the SSB burst indication information in the PEI is determined to be valid, the PEI is sent. If the network device has finished 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.

[0030] As can be seen, since the period for determining the SSB burst changes from the first period to the second period after the first start frame, the network device can send a second type of SSB or receive SSBs according to the second period after the first start frame. This allows it to switch from sending fewer SSBs to sending more, thus achieving adaptive SSB transmission. Furthermore, since the first start frame is the start frame within the paging period of the PF associated with the PEI, the network device can quickly synchronize downlink time and frequency with the terminal device and begin paging as soon as possible using a second type of SSB burst or a second-period SSB burst.

[0031] Ninth aspect, a communication method according to this application, applied to a terminal device, includes:

[0032] If the terminal device receives a paging message in the m-th millisecond, time slot, or symbol, and the PRACH resource indication information in the paging message is valid, 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 be 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.

[0033] As can be seen, since the validity of the second type of PRACH resource is determined after the (m+d)th millisecond, time slot, or symbol, or the period for determining 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 PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from sending fewer PRACH to sending more PRACH, thereby achieving adaptive PRACH transmission.

[0034] In some possible examples, the PRACH resource indication information occupies reserved bits within the paging, or the PRACH resource indication information occupies the remaining bits in the short message within the paging.

[0035] Tenthly, a communication method according to this application, applied to a network device, includes:

[0036] The PRACH resource indication information within the paging is determined to be valid, and the paging is sent. If the network device finishes sending the paging in the m-th 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 be 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.

[0037] As can be seen, since the period for determining the validity of the second type of PRACH resource after the (m+d)th millisecond, time slot, or symbol is changed from the first period to the second period, the network device can receive the second type of PRACH or receive PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows the device to change from receiving fewer PRACHs to receiving more PRACHs, thereby achieving adaptive PRACH reception.

[0038] Eleventhly, a communication method according to this application, applied to a terminal device, includes:

[0039] If the terminal device receives a paging message in the m-th millisecond, time slot, or symbol, and the SSB burst indication information in the paging message is valid, then the second type of SSB burst is determined to be valid after the (m+d)-th millisecond, time slot, or symbol. Alternatively, 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. Here, m is a positive integer, and d is an integer greater than or equal to 0.

[0040] As can be seen, since the validity of the second type SSB burst is determined after the (m+d)th millisecond, time slot, or symbol, or the period for determining the SSB burst changes from the first period to the second period, the terminal device can receive the second type SSB or receive SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows it to change from receiving fewer SSBs to receiving more SSBs, thus achieving adaptive SSB reception. Furthermore, since the (m+d)th millisecond, time slot, or symbol is highly likely to occur before the time domain position of the PRACH resource, the terminal device can receive the second type SSB burst or the second period SSB burst before the time domain position of the PRACH resource. Therefore, the terminal device can achieve downlink time-frequency synchronization and begin PRACH transmission as quickly as possible using the second type SSB burst or the second period SSB burst.

[0041] In some possible examples, the SSB burst indication message occupies reserved bits within the paging, or the SSBburst indication message occupies the remaining bits in the short message within the paging.

[0042] In a twelfth aspect, a communication method according to this application, applied to a network device, includes:

[0043] If the SSB burst indication information in the paging is determined to be valid, the paging is sent. If the network device finishes sending the paging in the m-th millisecond, time slot, or symbol, 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 be 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.

[0044] As can be seen, since the validity of the second type SSB burst is determined after the (m+d)th millisecond, time slot, or symbol, or the period for determining the SSB burst changes from the first period to the second period, the network device can send the second type SSB or send SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows it to switch from sending fewer SSBs to sending more, thus achieving adaptive SSB transmission. Furthermore, since the (m+d)th millisecond, time slot, or symbol is highly likely to occur before the time domain position of the PRACH resource, the network device can send the second type SSB burst or the second period SSB burst before the time domain position of the PRACH resource. Therefore, the network device can quickly achieve downlink time-frequency synchronization with the terminal device and begin receiving PRACH as soon as possible using the second type SSB burst or the second period SSB burst.

[0045] Thirteenth aspect, a communication method according to this application, applied to a terminal device, includes:

[0046] If the terminal device receives a paging message and the SSB burst indication information in the paging message is valid, then it determines that the second type of SSB burst is valid after the second start frame, or determines that the period of the SSB burst is changed from the first period to the second period after the second start frame.

[0047] As can be seen, since the period for determining the SSB burst changes from the first period to the second period after the second start frame, the terminal device can receive the second type of SSB or receive SSBs according to the second period after the second start frame, thereby changing from receiving fewer SSBs to receiving more SSBs, thus achieving adaptive SSB reception. Furthermore, since the second start frame is the start frame within the paging period of the paging-associated PF, the terminal device can achieve downlink time-frequency synchronization as quickly as possible through the second type of SSB burst or the second period's SSB burst.

[0048] The fourteenth aspect of this application is a communication method applied to a network device, comprising:

[0049] The network device determines that the SSB burst indication information in the paging is valid and sends the paging; if the network device has finished sending the paging, it determines that the second type of SSB burst is valid after the second start frame, or determines that the period of the SSB burst is changed from the first period to the second period after the second start frame.

[0050] As can be seen, since the period for determining the SSB burst changes from the first period to the second period after the first start frame, the network device can send a second type of SSB or receive SSBs according to the second period after the first start frame. This allows it to switch from sending fewer SSBs to sending more, thus achieving adaptive SSB transmission. Furthermore, since the second start frame is the start frame within the paging period of the paging PF, the network device can quickly achieve downlink time-frequency synchronization with the terminal device using a second type of SSB burst or a second-period SSB burst.

[0051] The fifteenth aspect is a communication method according to this application, applied to a terminal device, comprising:

[0052] If the terminal device receives a RAR in the m-th millisecond, time slot, or symbol, and the SSB burst indication information in the RAR is valid, 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.

[0053] As can be seen, since the validity of the second type SSB burst is determined after the (m+d)th millisecond, time slot, or symbol, or the period for determining the SSB burst changes from the first period to the second period, the terminal device can receive the second type SSB or receive SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows it to switch from receiving fewer SSBs to receiving more, thus achieving adaptive SSB reception. Furthermore, since the (m+d)th millisecond, time slot, or symbol is before Msg4 or Msg3, the terminal device can receive the second type SSB burst or the second period SSB burst before Msg4 or Msg3. Therefore, the terminal device can achieve downlink time-frequency synchronization as quickly as possible and begin receiving Msg4 or transmitting Msg3 as quickly as possible using the second type SSB burst or the second period SSB burst.

[0054] The sixteenth aspect is a communication method of this application, applied to a network device, comprising:

[0055] 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.

[0056] As can be seen, since the validity of the second type SSB burst is determined 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, the network device can send the second type SSB or send SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows the network device to change from sending fewer SSBs to sending more SSBs, thus achieving adaptive SSB transmission. Furthermore, since the (m+d)th millisecond, time slot, or symbol is before Msg4 or Msg3, the network device can send the second type SSB burst or the second period SSB burst before Msg4 or Msg3. Therefore, the network device can quickly achieve downlink time-frequency synchronization with the terminal device and quickly begin sending Msg4 or receiving Msg3 using the second type SSB burst or the second period SSB burst.

[0057] The seventeenth aspect is a communication method of this application, applied to a terminal device; comprising:

[0058] Receive indication information, which indicates that the PRACH resource indication information is or is not a valid value and the SSBburst indication information is or is not a valid value.

[0059] Eighteenth aspect, a communication method according to this application, applied to a network device; comprising:

[0060] Send indication information, which indicates that the PRACH resource indication information is or is not a valid value and the SSBburst indication information is or is not a valid value.

[0061] In this way, the indication information can indicate PRACH resource indication information and SSB burst indication information, which helps to save signaling overhead.

[0062] In some possible examples, a code point in the indication information indicates that both the PRACH resource indication information and the SSB burst indication information are valid values;

[0063] The other 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.

[0064] In some possible examples, the first of 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;

[0065] The second code point out of the four code points of the indication information indicates that the PRACH resource indication information is a valid value and the SSBburst indication information is not a valid value;

[0066] The third code point out of the four code points of the indication information indicates that the PRACH resource indication information is not a valid value and the SSBburst indication information is a valid value.

[0067] 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.

[0068] In some possible examples, 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; or one of the four code points of the indication information, excluding one or more code points, indicates that neither the PRACH resource indication information nor the SSB burst indication information is a valid value.

[0069] 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 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.

[0070] The first cycle combination consists of the cycle of the second type of PRACH resource and the cycle of the second type of SSB burst.

[0071] The second cycle combination consists of the second cycle of PRACH resources and the second cycle of SSB bursts.

[0072] The third cycle combination is the cycle of the second type of PRACH resource and the second cycle of the SSB burst;

[0073] The fourth cycle combination is the cycle of the second cycle and the second type of SSB burst of the PRACH resource;

[0074] The first duration combination is the duration of the second type of PRACH resource and the duration of the second type of SSB burst;

[0075] The second duration combination is the second duration of the PRACH resource and the second duration of the SSB burst;

[0076] The third duration combination is the duration of the second type of PRACH resource and the second duration of the SSB burst;

[0077] The fourth duration combination is the second duration of the PRACH resource and the duration of the second type of SSB burst.

[0078] In some possible examples, 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 of the four code points of the indication information, excluding one or more code points, indicates that the PRACH resource indication information is not a valid value.

[0079] One or more code points may also indicate the period of a type 2 PRACH resource or a second period of a PRACH resource, or one or more code points may also indicate the duration of a type 2 PRACH resource or a second duration of a PRACH resource.

[0080] In some possible examples, 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 of the four code points of the indication information, excluding one or more code points, indicates that the SSBburst indication information is not a valid value.

[0081] One or more code points may also indicate the period of a Type 2 SSB burst or the second period of an SSB burst, or one or more code points may also indicate the duration of a Type 2 SSB burst or the second duration of an SSB burst.

[0082] In some possible examples, one or more of the eight code points of the indication information indicate that both the PRACH resource indication information and the SSB burst indication information are valid values; or one of the eight code points of the indication information, excluding one or more code points, indicates that neither the PRACH resource indication information nor the SSB burst indication information is a valid value.

[0083] 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 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.

[0084] The first cycle combination consists of the cycle of the second type of PRACH resource and the cycle of the second type of SSB burst.

[0085] The second cycle combination consists of the second cycle of PRACH resources and the second cycle of SSB bursts.

[0086] The third cycle combination is the cycle of the second type of PRACH resource and the second cycle of the SSB burst;

[0087] The fourth cycle combination is the cycle of the second cycle and the second type of SSB burst of the PRACH resource;

[0088] The first duration combination is the duration of the second type of PRACH resource and the duration of the second type of SSB burst;

[0089] The second duration combination is the second duration of the PRACH resource and the second duration of the SSB burst;

[0090] The third duration combination is the duration of the second type of PRACH resource and the second duration of the SSB burst;

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

[0092] In some possible examples, 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 of the four code points of the indication information, excluding one or more code points, indicates that the PRACH resource indication information is not a valid value.

[0093] One or more code points may also indicate the period of a type 2 PRACH resource or a second period of a PRACH resource, or one or more code points may also indicate the duration of a type 2 PRACH resource or a second duration of a PRACH resource.

[0094] In some possible examples, one or more of the remaining four code points of the indication information indicate that the SSBburst indication information is a valid value, and one of the remaining four code points of the indication information, excluding one or more code points, indicates that the SSB burst indication information is not a valid value.

[0095] One or more code points may also indicate the period of a Type 2 SSB burst or the second period of an SSB burst, or one or more code points may also indicate the duration of a Type 2 SSB burst or the second duration of an SSB burst.

[0096] The nineteenth aspect is a communication method of this application, applied to a terminal device, comprising:

[0097] After receiving Msg4, the terminal device 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.

[0098] Thus, after receiving Msg4, the terminal device can use the RRC configuration in Msg4 to set the nature of the second type of PRACH resource or the periodic update of the PRACH resource, and / or after receiving Msg4, the terminal device can use the RRC configuration in Msg4 to set the nature of the second type of SSB burst or the periodic update of the SSB burst, thereby terminating or abandoning the second type of PRACH resource or the second type of SSB burst triggered by UL WUS, indicated by PEI, indicated by paging, or indicated by RAR, or determining 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] A twentieth aspect is a communication method of this application, applied to a network device, comprising:

[0100] 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.

[0101] In this way, after the network device sends Msg4, it can use the RRC configuration in Msg4 to set the nature of the Type 2 PRACH resource or the periodic update of the PRACH resource, and / or after the network device sends Msg4, it can use the RRC configuration in Msg4 to set the nature of the Type 2 SSB burst or the periodic update of the SSB burst, thereby terminating or abandoning the Type 2 PRACH resource or Type 2 SSB burst triggered by UL WUS, indicated by PEI, indicated by paging, or indicated by RAR, or determining 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] The twenty-first aspect is a communication device according to this application, comprising:

[0103] The determining unit is used to determine that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot, or symbol if the uplink wake-up signal has been sent 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.

[0104] As can be seen, since the validity of the second type of PRACH resource is determined after the (m+d)th millisecond, time slot, or symbol, or the period for determining 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 PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows the device to change from sending fewer PRACHs to sending more PRACHs, thereby achieving adaptive PRACH transmission and saving power through adaptive PRACH transmission.

[0105] A twenty-second aspect is a communication device according to this application, comprising:

[0106] 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.

[0107] As can be seen, since the validity of the second type of PRACH resource is determined after the (m+d)th millisecond, time slot, or symbol, or the period for determining 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 PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows the device to change from receiving fewer PRACHs to receiving more PRACHs, thereby achieving adaptive PRACH reception and saving power through adaptive PRACH reception.

[0108] The twenty-third aspect is a communication device according to this application, comprising:

[0109] 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 a PEI is received on the mth millisecond, time slot, or symbol and the PRACH resource indication information in the PEI is a valid value, 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.

[0110] As can be seen, since the validity of the second type of PRACH resource is determined after the (m+d)th millisecond, time slot, or symbol, or the period for determining 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 PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows the device to change from sending fewer PRACHs to sending more PRACHs, thereby achieving adaptive PRACH transmission and saving power through adaptive PRACH transmission.

[0111] A twentieth aspect is a communication device according to this application, comprising:

[0112] 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 PEI is sent in the m-th 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 be 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.

[0113] As can be seen, since the validity of the second type of PRACH resource is determined after the (m+d)th millisecond, time slot, or symbol, or the period for determining 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 PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows the device to change from receiving fewer PRACHs to receiving more PRACHs, thereby achieving adaptive PRACH reception and saving power through adaptive PRACH reception.

[0114] The twenty-fifth aspect is a communication device according to this application, comprising:

[0115] 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 if a PEI is received on the mth millisecond, time slot, or symbol and the SSB burst indication information in the PEI 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.

[0116] As can be seen, since the validity of the second type SSB burst is determined after the (m+d)th millisecond, time slot, or symbol, or the period for determining the SSB burst changes from the first period to the second period, the terminal device can receive the second type SSB or receive SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows it to change from receiving fewer SSBs to receiving more SSBs, thus achieving adaptive SSB reception. Furthermore, since the (m+d)th millisecond, time slot, or symbol is highly likely to occur before the paging frame (PF) or paging occasion (PO) associated with the PEI, the terminal device can receive the second type SSB burst or the second period SSB burst before the PF / PO. Therefore, the terminal device can achieve downlink time-frequency synchronization and begin paging reception as quickly as possible using the second type SSB burst or the second period SSB burst.

[0117] A twenty-sixth aspect is a communication device according to this application, comprising:

[0118] The determining unit is used to determine that the SSB burst indication information in the PEI is a valid value, and to transmit the PEI; if the PEI is transmitted in the m-th millisecond, time slot or symbol, 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 be 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.

[0119] As can be seen, since the period for determining the validity of the second type SSB burst after the (m+d)th millisecond, time slot, or symbol changes from the first period to the second period, the network device can send the second type SSB or send SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows the network device to switch from sending fewer SSBs to sending more, thus achieving adaptive SSB transmission. Furthermore, since the (m+d)th millisecond, time slot, or symbol is highly likely to occur before the PF or PO associated with the PEI, the network device can send the second type SSB burst or the second period SSB burst before the PF / PO. This allows the network device to quickly synchronize downlink time and frequency with the terminal device and begin paging as soon as possible.

[0120] The twenty-seventh aspect is a communication device according to this application, comprising:

[0121] The determining unit is configured to, if a PEI is received and the SSB burst indication information within the PEI is valid, 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.

[0122] As can be seen, since the period for determining the SSB burst changes 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 SSBs according to the second period after the first start frame, thus changing from receiving fewer SSBs to receiving more SSBs, thereby achieving adaptive SSB reception. Furthermore, since the first start frame is the start frame within the paging period of the PF associated with the PEI, the terminal device can quickly achieve downlink time-frequency synchronization and begin paging reception as soon as possible through the second type of SSB burst or the second period's SSB burst.

[0123] A twenty-eighth aspect is a communication device according to this application, comprising:

[0124] 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 PEI is sent, 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.

[0125] As can be seen, since the period for determining the SSB burst changes from the first period to the second period after the first start frame, the network device can send a second type of SSB or receive SSBs according to the second period after the first start frame. This allows it to switch from sending fewer SSBs to sending more, thus achieving adaptive SSB transmission. Furthermore, since the first start frame is the start frame within the paging period of the PF associated with the PEI, the network device can quickly synchronize downlink time and frequency with the terminal device and begin paging as soon as possible using a second type of SSB burst or a second-period SSB burst.

[0126] A twenty-ninth aspect is a communication device according to this application, comprising:

[0127] 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 a paging is received on the mth millisecond, time slot, or symbol and the PRACH resource indication information in the paging is a valid value, 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.

[0128] As can be seen, since the validity of the second type of PRACH resource is determined after the (m+d)th millisecond, time slot, or symbol, or the period for determining 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 PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from sending fewer PRACH to sending more PRACH, thereby achieving adaptive PRACH transmission.

[0129] Thirtieth aspect is a communication device according to this application, comprising:

[0130] The 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 paging is sent on the mth millisecond, time slot or symbol, then after the (m+d)th millisecond, time slot or symbol, the second type of PRACH resource is determined to be valid, or after the (m+d)th millisecond, time slot or symbol, the period of the PRACH resource is determined to be 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.

[0131] As can be seen, since the period for determining the validity of the second type of PRACH resource after the (m+d)th millisecond, time slot, or symbol is changed from the first period to the second period, the network device can receive the second type of PRACH or receive PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows the device to change from receiving fewer PRACHs to receiving more PRACHs, thereby achieving adaptive PRACH reception.

[0132] The thirty-first aspect is a communication device according to this application, comprising:

[0133] 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 if a paging is received on the mth millisecond, time slot, or symbol and the SSB burst indication information in the paging is valid, 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.

[0134] As can be seen, since the validity of the second type SSB burst is determined after the (m+d)th millisecond, time slot, or symbol, or the period for determining the SSB burst changes from the first period to the second period, the terminal device can receive the second type SSB or receive SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows it to change from receiving fewer SSBs to receiving more SSBs, thus achieving adaptive SSB reception. Furthermore, since the (m+d)th millisecond, time slot, or symbol is highly likely to occur before the time domain position of the PRACH resource, the terminal device can receive the second type SSB burst or the second period SSB burst before the time domain position of the PRACH resource. Therefore, the terminal device can achieve downlink time-frequency synchronization and begin PRACH transmission as quickly as possible using the second type SSB burst or the second period SSB burst.

[0135] The thirty-second aspect is a communication device according to this application, comprising:

[0136] 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 paging is sent in the m-th millisecond, time slot or symbol, then after the (m+d)-th millisecond, time slot or symbol, the second type of SSB burst is determined to be valid, or after the (m+d)-th millisecond, time slot or symbol, the period of the SSB burst is determined to be 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.

[0137] As can be seen, since the validity of the second type SSB burst is determined after the (m+d)th millisecond, time slot, or symbol, or the period for determining the SSB burst changes from the first period to the second period, the network device can send the second type SSB or send SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows it to switch from sending fewer SSBs to sending more, thus achieving adaptive SSB transmission. Furthermore, since the (m+d)th millisecond, time slot, or symbol is highly likely to occur before the time domain position of the PRACH resource, the network device can send the second type SSB burst or the second period SSB burst before the time domain position of the PRACH resource. Therefore, the network device can quickly achieve downlink time-frequency synchronization with the terminal device and begin receiving PRACH as soon as possible using the second type SSB burst or the second period SSB burst.

[0138] The thirty-third aspect is a communication device according to this application, comprising:

[0139] The determining unit is configured to, if a paging is received and the SSB burst indication information within the paging is valid, 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.

[0140] As can be seen, since the period for determining the SSB burst changes from the first period to the second period after the second start frame, the terminal device can receive the second type of SSB or receive SSBs according to the second period after the second start frame, thereby changing from receiving fewer SSBs to receiving more SSBs, thus achieving adaptive SSB reception. Furthermore, since the second start frame is the start frame within the paging period of the paging-associated PF, the terminal device can achieve downlink time-frequency synchronization as quickly as possible through the second type of SSB burst or the second period's SSB burst.

[0141] The thirty-fourth aspect is a communication device according to this application, comprising:

[0142] 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 paging is sent, it determines that the second type of SSB burst is valid after the second start frame, or determines that the period of the SSB burst is changed from the first period to the second period after the second start frame.

[0143] As can be seen, since the period for determining the SSB burst changes from the first period to the second period after the first start frame, the network device can send a second type of SSB or receive SSBs according to the second period after the first start frame. This allows it to switch from sending fewer SSBs to sending more, thus achieving adaptive SSB transmission. Furthermore, since the second start frame is the start frame within the paging period of the paging PF, the network device can quickly achieve downlink time-frequency synchronization with the terminal device using a second type of SSB burst or a second-period SSB burst.

[0144] The thirty-fifth aspect is a communication device according to this application, comprising:

[0145] 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 if the terminal device receives a RAR in the mth millisecond, time slot, or symbol and the SSBburst 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.

[0146] As can be seen, since the validity of the second type SSB burst is determined after the (m+d)th millisecond, time slot, or symbol, or the period for determining the SSB burst changes from the first period to the second period, the terminal device can receive the second type SSB or receive SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows it to switch from receiving fewer SSBs to receiving more, thus achieving adaptive SSB reception. Furthermore, since the (m+d)th millisecond, time slot, or symbol is before Msg4 or Msg3, the terminal device can receive the second type SSB burst or the second period SSB burst before Msg4 or Msg3. Therefore, the terminal device can achieve downlink time-frequency synchronization as quickly as possible and begin receiving Msg4 or transmitting Msg3 as quickly as possible using the second type SSB burst or the second period SSB burst.

[0147] The thirty-sixth aspect is a communication device according to this application, comprising:

[0148] The 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 RAR is sent in the m-th millisecond, time slot or symbol, 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 be 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.

[0149] As can be seen, since the validity of the second type SSB burst is determined 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, the network device can send the second type SSB or send SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows the network device to change from sending fewer SSBs to sending more SSBs, thus achieving adaptive SSB transmission. Furthermore, since the (m+d)th millisecond, time slot, or symbol is before Msg4 or Msg3, the network device can send the second type SSB burst or the second period SSB burst before Msg4 or Msg3. Therefore, the network device can quickly achieve downlink time-frequency synchronization with the terminal device and quickly begin sending Msg4 or receiving Msg3 using the second type SSB burst or the second period SSB burst.

[0150] The thirty-seventh aspect is a communication device according to this application, comprising:

[0151] 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.

[0152] The thirty-eighth aspect is a communication device according to this application, comprising:

[0153] A determining unit is used to send indication information, wherein the indication information PRACH resource indication information is valid or invalid and SSB burst indication information is valid or invalid.

[0154] In this way, the indication information indicates whether the PRACH resource indication information and the SSB burst indication information are valid or invalid.

[0155] The thirty-ninth aspect is a communication device according to this application, comprising:

[0156] The determining unit is configured to, upon receiving Msg4, determine whether to terminate the use of the second type of PRACH resource or the second type of SSB burst, or to determine whether 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.

[0157] Thus, after receiving Msg4, the terminal device can use the RRC configuration in Msg4 to set the nature of the second type of PRACH resource or the periodic update of the PRACH resource, and / or after receiving Msg4, the terminal device can use the RRC configuration in Msg4 to set the nature of the second type of SSB burst or the periodic update of the SSB burst, thereby terminating or abandoning the second type of PRACH resource or the second type of SSB burst triggered by UL WUS, indicated by PEI, indicated by paging, or indicated by RAR, or determining 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] Fortieth aspect, a communication device according to this application, comprising:

[0159] The determining unit is configured to, after sending to Msg4, determine whether to terminate the use of Type II PRACH resources or Type II SSBburst, or to determine whether to change the period of PRACH resources from the second period to the first period or the period of SSB burst from the second period to the first period.

[0160] In this way, after the network device sends Msg4, it can use the RRC configuration in Msg4 to set the nature of the Type 2 PRACH resource or the periodic update of the PRACH resource, and / or after the network device sends Msg4, it can use the RRC configuration in Msg4 to set the nature of the Type 2 SSB burst or the periodic update of the SSB burst, thereby terminating or abandoning the Type 2 PRACH resource or Type 2 SSB burst triggered by UL WUS, indicated by PEI, indicated by paging, or indicated by RAR, or determining 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 the forty-first aspect, any step in the method designed in the above aspects is applied to the terminal device.

[0162] Forty-second aspect, any step in the method designed in the above aspects is applied to a network device.

[0163] The forty-third aspect is a terminal device according to this application, comprising a processor, a memory, and a computer program or instructions stored in the memory, wherein the processor executes the computer program or instructions to implement the steps in the method designed in any of the above aspects.

[0164] The forty-fourth aspect is a network device according to this application, including a processor, a memory, and a computer program or instructions stored in the memory, wherein the processor executes the computer program or instructions to implement the steps in the method designed in any of the above aspects.

[0165] The forty-fifth aspect is a chip according to this application, including a processor and a communication interface, wherein the processor performs the steps of the method designed in any of the foregoing aspects.

[0166] The forty-sixth aspect is a chip module according to this application, including a transceiver component and a chip, wherein the chip includes a processor, and the processor performs the steps of the method designed in any of the above aspects.

[0167] The forty-seventh aspect is a computer-readable storage medium of this application, wherein it stores a computer program or instructions that, when executed, implement the steps of the method designed in any of the foregoing aspects. For example, the computer program or instructions are executed by a processor.

[0168] The forty-eighth aspect is a computer program product of this application, comprising a computer program or instructions, wherein, when executed, the computer program or instructions implement the steps of the method designed in any of the foregoing aspects. For example, the computer program or instructions are executed by a processor. Attached Figure Description

[0169] Figure 1 This is a schematic diagram of the architecture of a communication system according to an embodiment of this application;

[0170] Figure 2 This is a schematic diagram of the architecture of another communication system according to an embodiment of this application;

[0171] Figures 3 to 21 This is a flowchart illustrating a communication method according to an embodiment of this application;

[0172] Figure 22 This is a functional unit block diagram of a communication device according to an embodiment of this application;

[0173] Figure 23 This is a functional unit block diagram of another communication device according to an embodiment of this application;

[0174] Figure 24This is a schematic diagram of the structure of a terminal device according to an embodiment of this application;

[0175] Figure 25 This is a schematic diagram of the structure of a network device according to an embodiment of this application. Detailed Implementation

[0176] It should be understood that the terms "first," "second," etc., used in the embodiments of this application are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, software, product, or device that includes a series of steps or units is not limited to the listed steps or units, but also includes steps or units not listed, or other steps or units inherent to these processes, methods, products, or devices.

[0177] The term "embodiment" as used in the embodiments of this application means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0178] In this application's embodiments, "and / or" describes the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent the following three cases: A exists alone; A and B exist simultaneously; B exists alone. Here, A and B can be singular or plural. The symbol " / " indicates that the preceding and following related objects have an "or" relationship.

[0179] In the embodiments of this application, "at least one" or its similar expression refers to any combination of these items, including any combination of single or multiple items, meaning one or more, while "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. Each of a, b, and c can be an element or a set containing one or more elements.

[0180] In the embodiments of this application, "equal to" can be used with "greater than" and is applicable to technical solutions used when "greater than" is used; it can also be used with "less than" and is applicable to technical solutions used when "less than" is used. 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".

[0181] In the embodiments of this application, the terms "of," "corresponding / relevant," "corresponding," and "indicated" may sometimes be used interchangeably. It should be noted that when the distinction is not emphasized, their intended meanings are consistent.

[0182] In this application, "connection" refers to various connection methods, such as direct connection or indirect connection, to achieve communication between devices, and no limitation is made in this regard.

[0183] In the embodiments of this application, "network" can be expressed as the same concept as "system," and the communication system is the same as the communication network.

[0184] The following describes the relevant content, concepts, meanings, technical issues, technical solutions, and beneficial effects involved in the embodiments of this application.

[0185] The communication system of this embodiment will be described in detail below.

[0186] Communication System

[0187] The technical solutions of this application embodiment can be applied to various wireless communication systems, such as: Long Term Evolution (LTE) systems, Advanced Long Term Evolution (LTE-A) systems, New Radio (NR) systems, evolution systems of NR systems, LTE-based access to unlicensed spectrum (LTE-U) systems, NR-based access to unlicensed spectrum (NR-U) systems, non-terrestrial networks (NTN) systems, Universal Mobile Telecommunications System (UMTS), 6th-Generation (6G) communication systems, or other future communication systems, etc.

[0188] It should be noted that traditional communication systems support a limited number of user connections and are easy to implement. With the development of communication technology, the communication system of this application can support not only traditional communication systems, but also communication systems such as device-to-device (D2D), machine-to-machine (M2M), machine-type communication (MTC), vehicle-to-vehicle (V2V), vehicle-to-everything (V2X), and narrowband Internet of Things (NB-IoT). Therefore, the technical solutions of the embodiments of this application can be applied to the aforementioned communication systems.

[0189] For example, embodiments of this application can be applied to beamforming, carrier aggregation (CA), dual connectivity (DC), or standalone (SA) deployment scenarios.

[0190] For example, embodiments of this application can be applied to communication scenarios using unlicensed spectrum. In these embodiments, the unlicensed spectrum can be considered as shared spectrum. Alternatively, embodiments of this application can be applied to licensed spectrum. In these embodiments, the licensed spectrum can be considered as non-shared spectrum.

[0191] For example, the network architecture of a communication system according to an embodiment of this application can be found in [reference needed]. Figure 1 .like Figure 1 As shown, the communication system 10 may include a network device 110 and a terminal device 120. The terminal device 120 can communicate with the network device 110 wirelessly.

[0192] certainly, Figure 1 This is merely an example of a network architecture for a communication system and does not constitute a limitation on the network architecture of the communication systems in the embodiments of this application. For example, the communication system 10 may also include servers or other devices, or the communication system 10 may include other network devices besides network device 110, or the communication system 10 may include other terminal devices besides terminal device 120.

[0193] The terminal devices and network devices mentioned in this embodiment will be described below.

[0194] The terminal devices and network devices mentioned in this embodiment will be described below.

[0195] Terminal equipment

[0196] A terminal device can be a device with transceiver capabilities, and can also be referred to as a terminal, user equipment (UE), remote terminal equipment (relay UE), relay equipment (relay UE), access terminal equipment, user unit, user station, mobile station, mobile station, remote station, mobile device, user terminal equipment, smart terminal equipment, wireless communication equipment, user agent, or user device. It should be noted that a relay device is a terminal device capable of providing relay forwarding services to other terminal devices (including remote terminal devices).

[0197] For example, terminal devices can be mobile phones, tablets, computers with wireless transceiver capabilities, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, wireless terminal devices in industrial control, wireless terminal devices in autonomous driving, wireless terminal devices in remote medical care, wireless terminal devices in smart grids, wireless terminal devices in transportation safety, wireless terminal devices in smart cities, or wireless terminal devices in smart homes, etc.

[0198] For example, a terminal device can be a cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication capabilities, computing device or other processing device connected to a wireless modem, in-vehicle device, wearable device, terminal device in next-generation communication systems (such as NR communication systems, 6G communication systems), or terminal device in a future public land mobile network (PLMN), etc., without specific limitations.

[0199] In some possible examples, the terminal device can be deployed on land, including indoors or outdoors, handheld, wearable, or vehicle-mounted; it can be deployed on water (such as on ships); or it can be deployed in the air (such as airplanes, balloons, and satellites). The terminal device may include a device with wireless communication capabilities, such as a chip system, chip, or chip module. For example, the chip system may include a chip, but may also include other discrete devices. The terminal device can be a chip, chip module, device, unit, etc., without specific limitations.

[0200] Network equipment

[0201] A network device is a device with transceiver capabilities that can be used to communicate with terminal devices.

[0202] Network devices may include means for providing wireless communication capabilities to terminal devices, such as chip systems, chips, or chip modules. For example, the chip system may include chips or other discrete devices. The network device provides services to a cell, and terminal devices within that cell can communicate with the network device through transmission resources (such as spectrum resources). This cell may be a macro cell, small cell, metro cell, micro cell, pico cell, or femto cell, etc.

[0203] In some possible examples, the network device has mobility characteristics; for example, the network device can be a mobile device. Optionally, the network device can be a satellite or a balloon station. For example, the satellite can be a low Earth orbit (LEO) satellite, a medium Earth orbit (MEO) satellite, a geostationary orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc. Optionally, the network device can also be a base station located on land, water, or other similar locations.

[0204] In some possible examples, network devices may include access network devices and / or devices in the core network (CN).

[0205] The access network equipment and core network equipment are described in detail below.

[0206] Access network equipment

[0207] In some possible examples, the access network device can be a RAN node in a radio access network (RAN). The RAN can consist of multiple RAN nodes (e.g., 5G-RAN nodes) that implement radio physical layer functions, resource scheduling and radio resource management, radio access control, and mobility management functions.

[0208] In some possible examples, access network devices can connect to the UPF via the user plane interface N3 to transmit data from terminal devices; access network devices can establish control plane signaling connections via the control plane interface N2 and the access and mobility management function (AMF) to implement functions such as radio access bearer control.

[0209] In some possible examples, access network equipment may include, but is not limited to, 5G node base (gNB), evolved node base (eNB), wireless access point (WiFi AP), world interoperability for microwave access base station (WiMAX BS), transmission receiving point (TRP), wireless relay node, wireless backhaul node, master node (MN) in a dual connectivity architecture, secondary node (SN) in a dual connectivity architecture, and so on.

[0210] In some possible examples, the access network device can refer to a device used to communicate with a terminal device. For example, the access network device can be a base transceiver station (BTS) in a Global System for Mobile Communication (GSM) or Code Division Multiple Access (CDMA) system, a base station (nodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) system, an evolved node base (eNB) in an LTE system, a radio controller in a cloud radio access network (CRAN) scenario, or a relay station, access point, vehicle-mounted equipment, wearable device, and access network equipment in future 5G networks or future evolved PLMN networks, etc. The embodiments of this application are not limited to these.

[0211] In some possible examples, the functionality of access network equipment is divided into two parts, known as centralized unit (CU) - distributed unit (DU) separation. From a protocol stack perspective, the CU includes the Radio Resource Control (RRC) layer and Packet Data Convergence Protocol (PDCP) layer of the LTE base station, while the DU includes the Radio Link Control (RLC) layer, Media Access Control (MAC) layer, and Physical (PHY) layer of the LTE base station. In a typical 5G base station deployment, the CU and DU are physically connected via fiber optic cable, and logically share a specially defined F1 interface for communication between them. Functionally, the CU is primarily responsible for radio resource control and configuration, inter-cell mobility management, and bearer management. The DU is primarily responsible for scheduling, physical signal generation, and transmission.

[0212] In some possible examples, the access network equipment can be a macro base station, micro base station, pico base station, small station, relay station, balloon station, etc.

[0213] Core network equipment

[0214] Core network equipment may include network elements that provide various functions. Here, "network element" can be referred to as an entity, device, apparatus, or module, etc., without specific limitations. Furthermore, for ease of understanding and explanation, the description of "network element" is omitted in some descriptions. For example, the network exposure function (NEF) network element is abbreviated as NEF. In this case, "NEF" should be understood as either a NEF network element or a NEF entity. The following omits explanations of similar cases.

[0215] For example, core network equipment may include a mobility management entity (MME), a broadcast multicast service center (BMSC), or corresponding functional entities in the 5G system, such as core network control plane (CP) or user plane (UP) network functions. The core network control plane can be understood as the core network control plane function (CPF) entity.

[0216] The following section describes the various network elements included in the core network equipment.

[0217] The session management function (SMF) is responsible for the control plane functions of terminal device session management, including the selection and control of user plane functions (UPF), Internet Protocol (IP) address allocation, session QoS management, acquisition policy and charging control (PCC) policies, etc.

[0218] The user plane function (UPF) can serve as the anchor point for protocol data unit (PDU) session connections. It is responsible for filtering data packets from terminal devices, transmitting / forwarding data, rate control, generating billing information, and providing connectivity to the data network (DN).

[0219] The policy control function (PCF) can provide configuration policy information for terminal devices, provide policy information for network control plane elements (such as SMF) to manage and control terminal devices, and generate access policies and QoS flow control policies for terminal devices.

[0220] The AF (Action Center) can interact with core network elements to provide services. For example, the AF interacts with the PCF (Programmable Component Function) for service policy control, with the NEF (Network Component Function) to obtain network capability information or provide application information to the network, and with the PCF to provide data network access point information to generate corresponding data service routing information.

[0221] NEF can be responsible for providing network-related status information to application services.

[0222] The Authentication Server Function (AUSF) can implement access authentication for both 3GPP and non-3GPP systems.

[0223] Unified data management (UDM) enables unified data management functions. Examples include 3GPP AKA authentication, user identification, access authorization, registration, mobility, subscription, and SMS management.

[0224] The network slice selection function (NSSF) can determine the network slice instances that a terminal device is allowed to access based on the terminal device's slice selection assistance information, subscription information, and other factors.

[0225] The network repository function (NRF) can be a new feature that provides registration and discovery capabilities, enabling network functions (NFs) to discover each other and communicate through an API interface.

[0226] Unified data management (UDM) can be responsible for the management of user identifiers, subscription data, authentication data, and user service element registration management.

[0227] The unified data repository (UDR) can be used by UDM to store or retrieve subscription data, and by PCF to store or retrieve policy data.

[0228] The network data analytics function (NWDAF) can provide network analysis services based on request data from network services.

[0229] The network slice specific authentication and authorization function (NSSAAF) can be used to provide authentication and authorization for specific network slices.

[0230] It should be noted that the terminal device connects to the access network device wirelessly, and the access network device connects to the core network device wirelessly or via a wired connection. The access network device and the core network device can be independent and different physical devices, or the functions of the core network device and the logical functions of the access network device can be integrated into the same physical device, or a single physical device can integrate some of the functions of the core network device and some of the functions of the access network device.

[0231] For example, Figure 2 This is a schematic diagram of the architecture of another communication system according to an embodiment of this application. Wherein, Figure 2 The names of the network elements included are merely names and do not limit the function of the network element itself. In 5G networks and other future networks, the aforementioned network elements may also have other names, without specific restrictions. For example, in 6G networks, some or all of the aforementioned network elements may use the terminology from 5G, or they may have other names, etc. This is explained uniformly here and will not be elaborated further below.

[0232] in addition, Figure 2 The various network elements in the network do not necessarily have to exist at the same time; the required network elements can be determined based on the needs. Figure 2 The connection relationships between the various network elements are not uniquely defined and can be adjusted according to requirements. It is understood that the aforementioned network elements or functions can be network components in hardware devices, software functions running on dedicated hardware, or virtualization functions instantiated on a platform (e.g., a cloud platform).

[0233] certainly, Figure 2 This is merely an example of a network architecture for a communication system and does not constitute a limitation on the network architecture of the communication systems in the embodiments of this application.

[0234] Enhancement of the communication process

[0235] Network energy savings (network power saving) is a major concern for operators and equipment manufacturers, as it is beneficial for reducing operating costs and promoting environmental protection.

[0236] Generally, when the network load is zero or low, the process of network devices sending common downlink signals / channels accounts for a significant proportion of their power consumption. These common downlink signals / channels can include synchronization signal blocks (SSBs), system information block 1 (SIB1), system information block x (SIBx), paging, and random access responses (RARs). SIB1 is also known as remaining main system information (RMSI), and SIBx is also known as other system information (OSI). Optionally, SSBs, SIB1, OSI, and paging are all sent periodically by the network devices.

[0237] It is worth noting that the paging mentioned in this embodiment can be any one of the following: physical downlink control channel (PDCCH), downlink control information (DCI), physical downlink share channel (PDSCH), or paging message.

[0238] When a network device needs to address a terminal device (e.g., a service with a terminal device), the network device may need to send a paging message to the terminal device. Paging has a certain probability of being sent; for example, the network device has a 10% probability of sending a paging message.

[0239] For terminal devices in the idle or inactive state, the SSB can be used for initial cell selection, radio resource management (RRM) measurements, and time-frequency synchronization. RRM measurements can include RRM measurements of the serving cell or neighboring cells.

[0240] Time-frequency synchronization primarily occurs before the terminal device receives paging, RAR, or message 4 (Msg4), etc., to achieve a certain level of time-frequency synchronization for correct reception of paging, RAR, or Msg4, etc. Alternatively, time-frequency synchronization primarily occurs before the terminal device sends message 3 (Msg3), etc., to achieve a certain level of time-frequency synchronization for correct transmission of Msg3, etc.

[0241] Generally, PRACH is transmitted after paging, RAR after PRACH, Msg3 after RAR, and Msg4 after Msg3. Therefore, for the terminal device, it may need to process a relatively large number of SSBs before receiving paging, RAR, and Msg4. Correspondingly, for the network device, it may need to send even more SSBs before sending paging, RAR, and Msg4 to assist the terminal device in time-frequency synchronization. However, outside of these situations (such as initial cell selection, local cell RRM measurement, and neighbor cell measurement), the network device may only need to send fewer SSBs to conserve power.

[0242] For terminal devices, they may need to process a number of SSBs before sending Msg3. Similarly, for network devices, they may need to send more SSBs before receiving Msg3 to assist terminal devices in time-frequency synchronization. However, in other cases (such as initial cell selection, local cell RRM measurement, and neighbor cell measurement), network devices may only need to send fewer SSBs to save power.

[0243] Generally, when network load is zero or low, the process of receiving common uplink signals / channels by network devices accounts for a significant proportion of their power consumption. These common uplink signals / channels can include the Physical Random Access Channel (PRACH) or Msg3, etc. Optionally, the PRACH is received periodically by the network device.

[0244] After a terminal device initiates an uplink activity or is paged by a network device, if the terminal device needs to access the network (random access), it may need to send a PRACH message to the network device. Therefore, for idle or inactive terminal devices, a PRACH message may be required after an uplink activity or paging session. Correspondingly, for network devices, after an uplink activity or paging session, the network device may need to receive more PRACH messages to facilitate network access. However, outside of these scenarios, the network device may only need to receive fewer PRACH messages to conserve power.

[0245] In summary, for scenarios where terminal devices need to perform time-frequency synchronization or need to access a network, this embodiment can specifically consider the following two situations:

[0246] One scenario is:

[0247] For terminal devices, in some situations, such as before receiving a paging, RAR, or Msg4 message, or before sending Msg3, the terminal device may need to receive a large number of SSBs. For network devices, in some situations, such as before sending a paging, RAR, or Msg4 message, or before receiving Msg3, the network device may need to send a large number of SSBs to achieve time-frequency synchronization for the terminal device. Outside of these situations, the network device may only need to send a small number of SSBs to conserve power.

[0248] As can be seen, this embodiment considers that network devices can support adaptive transmission of SSBs and terminal devices can support adaptive reception of SSBs, which helps to save power consumption of network devices and terminal devices.

[0249] It should be noted that network devices support adaptive SSB transmission, which can be understood as the network device transmitting more SSBs within a certain period of time, and less SSBs outside of that period; terminal devices support adaptive SSB reception, which can be understood as the terminal device receiving more SSBs within a certain period of time, and less SSBs outside of that period.

[0250] Another scenario is:

[0251] For terminal devices, in some situations, such as when the terminal device has an uplink service or after receiving a paging message, the terminal device may need to send PRACH messages. For network devices, in some situations, such as when the terminal device has an uplink service or after the network device sends a paging message, the network device may need to receive more PRACH messages to enable the terminal device to access the network. However, outside of these situations, the network device may only need to receive fewer PRACH messages to save power.

[0252] As can be seen, this embodiment considers that network devices can support adaptive PRACH reception and terminal devices can support adaptive PRACH transmission in order to save power consumption.

[0253] It should be noted that network devices support adaptive PRACH reception, which can be understood as the network device receiving more PRACH within a certain period of time, and receiving fewer PRACH outside of that period; terminal devices support adaptive PRACH transmission, which can be understood as the terminal device transmitting more PRACH within a certain period of time, and transmitting fewer PRACH outside of that period.

[0254] The following embodiments provide detailed explanations of how terminal devices support adaptive PRACH transmission, network devices support adaptive PRACH reception, terminal devices support adaptive SSB reception, and network devices support adaptive SSB transmission, using different examples. [Example 1]

[0255] In “Example 1”, this embodiment can use the uplink wake-up signal (ULWUS) request to specifically explain whether the terminal device supports adaptive PRACH transmission and the network device supports adaptive PRACH reception.

[0256] For a terminal device, taking the UL WUS request to the network device to receive Type 2 PRACH or the network device to receive PRACH according to the second cycle as an example, one scenario is that the terminal device initially sends Type 1 PRACH or sends PRACH according to the first cycle; then, after the terminal device has uplink traffic, the terminal device sends UL WUS to the network device; finally, another scenario is that after the terminal device sends UL WUS, it can send Type 2 PRACH or send PRACH according to the second cycle. Another scenario is that after the terminal device sends UL WUS, it starts listening for feedback information, which indicates that it can send Type 2 PRACH or send PRACH according to the second cycle. This feedback information can be included in the Random Access Response (RAR).

[0257] In other words, the terminal device can determine that the Type 1 PRACH resource is valid or that the PRACH resource period is the first period. One scenario is that after the terminal device sends the UL WUS, it can determine that the Type 2 PRACH resource is valid or that the PRACH resource period has changed from the first period to the second period. Another scenario is that after the terminal device sends the UL WUS, it starts listening for feedback information. Based on the feedback information, the terminal device can determine that the Type 2 PRACH resource is valid or that the PRACH resource period has changed from the first period to the second period. This feedback information can be included in the Random Access Response (RAR).

[0258] It should be noted that the PRACH resources mentioned in this embodiment can be understood as resources used for transmitting / carrying PRACH. PRACH resources may include preambles, which are generally considered as code-domain resources. PRACH resources may include PRACH occasions (ROs). Generally, PRACH resources include both time-domain and frequency-domain resources. PRACH resources can be periodic, such as ROs.

[0259] Therefore, Type I PRACH resources can be understood as resources used for transmitting or carrying Type I PRACH. Type II PRACH resources can be understood as resources used for transmitting or carrying Type II PRACH. Type I PRACH resources can be periodic, and Type II PRACH resources can also be periodic.

[0260] When the terminal device determines that the Type 1 PRACH resource is valid, it means that the terminal device can send Type 1 PRACH messages using the Type 1 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 PRACH messages according to the first period using the PRACH resource. When the terminal device determines that the Type 2 PRACH resource is valid, it means that the terminal device can send Type 2 PRACH messages using the Type 2 PRACH resource. When the terminal device determines that the period of the PRACH resource is the second period, the terminal device can send PRACH messages according to the second period using the PRACH resource.

[0261] Furthermore, the period of Type I PRACH is longer than that of Type II PRACH. For example, Type I PRACH is a long-period PRACH, and Type II PRACH is a short-period PRACH. The period of Type I PRACH resources is longer than that of Type II PRACH resources. For example, Type I PRACH resources are long-period PRACH resources, and Type II PRACH resources are short-period PRACH resources. Additionally, the first period is longer than the second period. For example, the first period is long-period, and the second period is short-period. It should be noted that, generally, the terminal device sends long-period PRACH or sends PRACH according to a long period. Because it is a long period, the terminal device can send fewer PRACHs. Then, after the terminal device has uplink traffic, the terminal device can request the network device to receive short-period PRACH or the network device to receive PRACH according to a short period by sending UL WUS. Thus, after the terminal device sends UL WUS, it sends short-period PRACH or sends PRACH according to a short period. Because of the short cycle, the terminal device can send more PRACH messages.

[0262] As can be seen, after the terminal device completes sending UL WUS, it can switch from sending Type I PRACH to sending Type II PRACH, or from sending PRACH according to the first cycle to sending PRACH according to the second cycle. Since the period of Type I SSB is longer than that of Type II SSB, and the first cycle is longer than the second cycle, after sending UL WUS, the terminal device can switch from sending fewer PRACH to sending more PRACH, thus achieving adaptive PRACH transmission.

[0263] The following example illustrates how a terminal device completes the transmission of UL WUS in the m-th millisecond, time slot, or symbol. Figure 3 As shown, Figure 3 This is a flowchart illustrating a communication method according to an embodiment of this application, specifically including the following steps:

[0264] S310. If the terminal device finishes sending UL WUS in the m-th millisecond, time slot, or symbol, then after the (m+d)-th millisecond, time slot, or symbol, the terminal device determines that the second type of PRACH resource is valid, or after the (m+d)-th millisecond, time slot, or symbol, the terminal device 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.

[0265] In another scenario, after the terminal device sends the uplink wake-up signal, it starts listening for feedback information. If the terminal device receives feedback information 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. Alternatively, 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. Here, m is a positive integer and d is an integer greater than or equal to 0.

[0266] It should be noted that prior to S310, terminal devices could determine whether the first type of PRACH resource was valid or whether the period of the PRACH resource was the first period.

[0267] In another scenario, after transmitting UL WUS on the m-th millisecond, time slot, or symbol, the terminal device may require a delay of d milliseconds, time slots, or symbols to determine whether the Type 2 PRACH resource is valid or whether the PRACH resource period is the second period. When d is 0, this means that the terminal device immediately determines whether the Type 2 PRACH resource is valid or whether the PRACH resource period changes from the first period to the second period after the m-th millisecond, time slot, or symbol. In yet another scenario, after receiving feedback information on the m-th millisecond, time slot, or symbol, the terminal device may require a delay of d milliseconds, time slots, or symbols to determine whether the Type 2 PRACH resource is valid or whether the PRACH resource period is the second period. When d is 0, this means that the terminal device immediately determines whether the Type 2 PRACH resource is valid or whether the PRACH resource period changes from the first period to the second period after the m-th millisecond, time slot, or symbol.

[0268] 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. This can be interpreted as the terminal device determining that, starting from the most recent PRACH resource, the period of the PRACH resource changes from the first period to the second period.

[0269] It is worth noting that when Type 2 PRACH resources are valid, this means that the terminal device can send Type 2 PRACH messages using these resources. When the period of the PRACH resource is the second period, this means that the terminal device can send PRACH messages according to the second period using these resources.

[0270] As can be seen, 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 after the (m+d)th millisecond, time slot, or symbol, the terminal device determines that the period of the PRACH resource has changed from the first period to the second period, the terminal device can send the second type of PRACH or send PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from sending fewer PRACH to sending more PRACH, thereby realizing adaptive PRACH transmission.

[0271] For network devices, taking the UL WUS request for the network device to receive Type 2 PRACH or the network device to receive PRACH according to the second cycle as an example, the network device originally receives Type 1 PRACH or receives PRACH according to the first cycle; then, after the network device determines that the terminal device has uplink service, the network device receives UL WUS; finally, after the network device receives UL WUS, the network device can receive Type 2 PRACH or receive PRACH according to the second cycle.

[0272] In other words, the network device can determine that the Type 1 PRACH resource is valid or that the PRACH resource period is the first period. After receiving UL WUS, the network device can determine that the Type 2 PRACH resource is valid or that the PRACH resource period changes from the first period to the second period.

[0273] It should be noted that when a network device determines that a Type I PRACH resource is valid, it means that the network device can receive Type I PRACH messages through that resource. When a network device determines that the period of a PRACH resource is the first period, it means that the network device can receive PRACH messages according to the first period through that resource. When a network device determines that a Type II PRACH resource is valid, it means that the network device can receive Type II PRACH messages through that resource. When a network device determines that the period of a PRACH resource is the second period, it means that the network device can receive PRACH messages according to the second period through that resource.

[0274] Furthermore, the period of the first type of PRACH is longer 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 longer 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. Additionally, the first period is longer than the second period. For example, the first period is long-period, and the second period is short-period.

[0275] It should be noted that, generally, network devices receive long-cycle PRACH messages or receive PRACH messages according to a long-cycle schedule. Because of the long cycle, the network device can receive fewer PRACH messages. Then, after the terminal device has uplink traffic, the terminal device can request the network device to receive short-cycle PRACH messages or receive PRACH messages according to a short cycle by sending a UL WUS. In this way, after the network device receives the UL WUS, it can receive short-cycle PRACH messages or receive PRACH messages according to a short cycle. Because of the short cycle, the network device can receive more PRACH messages.

[0276] As can be seen, after a network device receives UL WUS, it changes from receiving Type I PRACH to receiving Type II PRACH, or from receiving PRACH according to the first cycle to receiving PRACH according to the second cycle. Since the cycle of Type I SSB is longer than that of Type II SSB, and the first cycle is longer than the second cycle, after receiving UL WUS, the network device can change from receiving fewer PRACH to receiving more PRACH, thus achieving adaptive PRACH reception.

[0277] The following example illustrates this, using the scenario where a network device receives a UL WUS signal in the m-th millisecond, time slot, or symbol. Figure 4 As shown, Figure 4 This is a flowchart illustrating another communication method according to an embodiment of this application, specifically including the following steps:

[0278] S410. If the network device receives UL WUS on the m-th 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 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.

[0279] In another scenario, after the network device receives the uplink wake-up signal, it prepares to send feedback information. If the network device finishes sending the feedback information in the m-th 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, where m is a positive integer and d is an integer greater than or equal to 0.

[0280] It should be noted that prior to S410, network devices could determine the validity of Type I PRACH resources or determine the period of PRACH resources as the first period.

[0281] Additionally, after receiving UL WUS on the m-th millisecond, time slot, or symbol, the network device may require a delay of d milliseconds, time slots, or symbols to determine whether the Type 2 PRACH resource is valid or whether the PRACH resource period is the second period. When d is 0, this indicates that the network device determines whether the Type 2 PRACH resource is valid or whether the PRACH resource period has changed from the first period to the second period after the m-th millisecond, time slot, or symbol. Alternatively, after receiving UL WUS and preparing to send feedback information, after sending the feedback information on the m-th millisecond, time slot, or symbol, the network device may require a delay of d milliseconds, time slots, or symbols to determine whether the Type 2 PRACH resource is valid or whether the PRACH resource period is the second period. When d is 0, this indicates that the network device determines whether the Type 2 PRACH resource is valid or whether the PRACH resource period has changed from the first period to the second period after the m-th millisecond, time slot, or symbol.

[0282] 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. This can be expressed as follows: 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, starting from the most recent PRACH resource.

[0283] It is worth noting that when Type 2 PRACH resources are valid, it means that network devices can receive Type 2 PRACHs through these resources. When the period of the PRACH resource is the second period, it means that network devices can receive PRACHs according to the second period through these resources.

[0284] As can be seen, 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 PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from receiving fewer PRACH to receiving more PRACH, thereby realizing adaptive PRACH reception.

[0285] The following is about the above. Figure 3 and Figure 4 The example of 'd' is provided below.

[0286] In some possible examples, d can be a preset value, a value indicated by the network device from a plurality of preset values ​​via signaling, or a value selected by the terminal device from a plurality of preset values ​​based on its own capabilities. In this case, the terminal device's own capabilities have already been communicated to the network device via higher-layer signaling, ensuring consistency between the two.

[0287] The following is about the above. Figure 3 and Figure 4 The UL WUS example is provided below.

[0288] In some possible examples, UL WUS is one or more specific preambles within a first-class PRACH resource.

[0289] It should be noted that Type 1 PRACH resources can be understood as resources used for transmitting Type 1 PRACH. The period of Type 1 PRACH resources is longer than that of Type 2 PRACH resources. For example, Type 1 PRACH resources are long-period PRACH resources, while Type 2 PRACH resources are short-period PRACH resources. Thus, since UL WUS consists of one or more specific preambles within Type 1 PRACH resources, the terminal device can transmit UL WUS through Type 1 PRACH resources.

[0290] In some possible examples, UL WUS is one or more specific preambles within a PRACH resource with a first cycle.

[0291] It should be noted that a PRACH resource with a first period can be understood as a PRACH resource with a period of one period, for example, a PRACH resource with a long period. Thus, since UL WUS consists of one or more specific preambles within a PRACH resource with a first period, the terminal device can transmit UL WUS through a PRACH resource with a first period.

[0292]

Example 2

[0293] In “Example 2”, this embodiment can use paging early indication (PEI) to specifically explain the terminal device’s support for adaptive PRACH transmission, the network device’s support for adaptive PRACH reception, the terminal device’s support for adaptive SSB reception, and the network device’s support for adaptive PRACH transmission under different circumstances.

[0294] Generally, PEI is carried by PEIPDCCH or PEIDCI, such as Type2A-PDCCH or Type2A-PDCCH common search space (CSS set) or PDCCH corresponding to DCI format 2_7. Alternatively, PEI is carried by PEIDCI, such as DCI format 2_7.

[0295] Scenario 1

[0296] In "Scenario 1," through PEI, after the terminal device receives a paging message, it can send more PRACH messages to enable adaptive PRACH transmission. Similarly, through PEI, after the network device sends a paging message, the network device can receive more PRACH messages to enable adaptive PRACH reception.

[0297] The following sections will provide specific explanations regarding terminal devices and network devices.

[0298] For a terminal device, taking the PEI instruction to send a Type 2 PRACH or send a PRACH according to the second cycle as an example, the terminal device originally sent a Type 1 PRACH or sent a PRACH according to the first cycle; then, after the terminal device receives the PEI, the terminal device can send a Type 2 PRACH or send a PRACH according to the second cycle after receiving the paging.

[0299] In other words, 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. After receiving the PEI, the terminal device can determine 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.

[0300] Additionally, PEI is received before the terminal device receives the paging message. The period of Type I PRACH is longer than that of Type II PRACH, and the first period is longer than the second period. For example, Type I PRACH may be a long-period PRACH, and Type II PRACH may be a short-period PRACH. The period of Type I PRACH resources is longer than that of Type II PRACH resources. For example, Type I PRACH resources may be long-period PRACH resources, and Type II PRACH resources may be short-period PRACH resources. Furthermore, the first period is longer than the second period. For example, the first period may be long-period, and the second period may be short-period.

[0301] It should be noted that, generally, the terminal device sends long-cycle PRACH messages or sends PRACH messages with a long cycle. Because of the long cycle, the terminal device can send fewer PRACH messages. Then, before the network device needs to send a paging request (e.g., to address the terminal device), the network device can instruct the terminal device to send short-cycle PRACH messages or send PRACH messages with a short cycle by sending a PEI (Paging Information Instruction). Thus, after receiving the PEI, the terminal device can send short-cycle PRACH messages or send PRACH messages with a short cycle after receiving the paging request. Because of the short cycle, the terminal device can send more PRACH messages.

[0302] As can be seen, after receiving the PEI, the terminal device changes from sending Type I PRACH to sending Type II PRACH, or from sending PRACH according to the first cycle to sending PRACH according to the second cycle. Since the period of Type I SSB is longer than that of Type II SSB, and the first cycle is longer than the second cycle, after receiving the PEI, the terminal device can change from sending fewer PRACH to sending more PRACH, thus achieving adaptive PRACH transmission.

[0303] The following example illustrates this, using the terminal device receiving a PEI in the m-th millisecond, time slot, or symbol. Figure 5 As shown, Figure 5 This is a flowchart illustrating another communication method according to an embodiment of this application, specifically including the following steps:

[0304] S510. If the terminal device receives a PEI in the m-th millisecond, time slot, or symbol, and the PRACH resource indication information in the PEI is a valid value, then after the (m+d)-th millisecond, time slot, or symbol, the terminal device determines that the second type of PRACH resource is valid, or after the (m+d)-th millisecond, time slot, or symbol, the terminal device 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.

[0305] It should be noted that prior to S510, terminal devices could determine whether the first type of PRACH resource was valid or whether the period of the PRACH resource was the first period.

[0306] Additionally, after receiving a PEI in the m-th millisecond, time slot, or symbol, the terminal device may require a delay of d milliseconds, time slots, or symbols to determine whether the Type 2 PRACH resource is valid or whether the PRACH resource period is changed to the second period. When d is 0, this indicates that the terminal device determines whether the Type 2 PRACH resource is valid or whether the PRACH resource period has changed from the first period to the second period after the m-th millisecond, time slot, or symbol.

[0307] 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. This can be interpreted as the terminal device determining that, starting from the most recent PRACH resource, the period of the PRACH resource changes from the first period to the second period.

[0308] Additionally, the PRACH resource indication information can indicate whether a Type II PRACH resource or a PRACH resource with a second period is valid. When the PRACH resource indication information is valid, it indicates that either the Type II PRACH resource or the PRACH resource with a second period is valid. Thus, the terminal device can determine whether the Type II PRACH resource is valid or whether the PRACH resource period is the second period based on the valid PRACH resource indication information. Optionally, the valid value can be 0 or 1.

[0309] As can be seen, 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 after the (m+d)th millisecond, time slot, or symbol, the terminal device determines that the period of the PRACH resource has changed from the first period to the second period, the terminal device can send the second type of PRACH or send PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from sending fewer PRACH to sending more PRACH, thereby realizing adaptive PRACH transmission.

[0310] For network devices, taking the PEI instruction to the terminal device to send a Type 2 PRACH or send a PRACH according to the second cycle as an example, the network device originally received a Type 1 PRACH or received a PRACH according to the first cycle; then, after the network device has sent the PEI, the network device can receive a Type 2 PRACH or receive a PRACH according to the second cycle after the network device has sent the paging.

[0311] In other words, a network device can determine that a Type I PRACH resource is valid or that the PRACH resource period is the first period. After the network device sends the PEI, it can determine that a Type II PRACH resource is valid or that the PRACH resource period changes from the first period to the second period.

[0312] Additionally, the PEI is sent before the network device sends the paging message. The period of Type I PRACH is longer than the period of Type II PRACH. For example, Type I PRACH is a long-period PRACH, and Type II PRACH is a short-period PRACH. The period of Type I PRACH resources is longer than the period of Type II PRACH resources. For example, Type I PRACH resources are long-period PRACH resources, and Type II PRACH resources are short-period PRACH resources. Furthermore, the first period is longer than the second period. For example, the first period is long-period, and the second period is short-period.

[0313] It should be noted that, generally, network devices receive long-cycle PRACH messages or receive PRACH messages according to a long-cycle schedule. Because of the long cycle, the network device can receive fewer PRACH messages. Then, before the network device needs to send a paging request (e.g., to address a terminal device), it can instruct the terminal device to send a short-cycle PRACH message or receive PRACH messages according to a short cycle by sending a PEI (Paging Instruction). Thus, after the network device sends the PEI, it can receive short-cycle PRACH messages or receive PRACH messages according to a short cycle after sending the paging request. Because of the short cycle, the network device can receive more PRACH messages.

[0314] As can be seen, after the network device sends the PEI, it changes from receiving Type I PRACH to receiving Type II PRACH, or from receiving PRACH according to the first cycle to receiving PRACH according to the second cycle. Since the period of Type I SSB is longer than that of Type II SSB, and the first cycle is longer than the second cycle, after the network device sends the paging message, it can change from receiving fewer PRACH to receiving more PRACH, thus achieving adaptive PRACH reception.

[0315] The following example illustrates this, using the scenario where a network device completes sending the PEI in the m-th millisecond, time slot, or symbol. Figure 6 As shown, Figure 6 This is a flowchart illustrating another communication method according to an embodiment of this application, specifically including the following steps:

[0316] S610. Determine that the PRACH resource indication information in the PEI is a valid value, and send the PEI; if the network device finishes sending the PEI in the m-th 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 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.

[0317] It should be noted that prior to S610, network devices could determine the validity of Type I PRACH resources or determine the period of PRACH resources as the first period.

[0318] Additionally, after transmitting the PEI in the m-th millisecond, time slot, or symbol, the network device may require a delay of d milliseconds, time slots, or symbols to determine whether the Type 2 PRACH resource is valid or whether the PRACH resource period has changed to the second period. When d is 0, this indicates that the network device determines whether the Type 2 PRACH resource is valid or whether the PRACH resource period has changed from the first period to the second period after the m-th millisecond, time slot, or symbol.

[0319] 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. This can be expressed as follows: 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, starting from the most recent PRACH resource.

[0320] Additionally, the PRACH resource indication information can indicate whether a Type 2 PRACH resource or a PRACH resource with a second period is valid. When the PRACH resource indication information is valid, it means that either a Type 2 PRACH resource or a PRACH resource with a second period is valid. Thus, network devices can use a valid PRACH resource indication information to inform terminal devices whether a Type 2 PRACH resource is valid or whether the PRACH resource period is the second period. Optionally, the valid value can be 0 or 1.

[0321] As can be seen, 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 PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from receiving fewer PRACH to receiving more PRACH, thereby realizing adaptive PRACH reception.

[0322] The following is about the above. Figure 5 and Figure 6 The example of 'd' is provided below.

[0323] In some possible examples, d can be a preset value, a value indicated by the network device from a plurality of preset values ​​via signaling, or a value selected by the terminal device from a plurality of preset values ​​based on its own capabilities. In this case, the terminal device's own capabilities have already been communicated to the network device via higher-layer signaling, ensuring consistency between the two.

[0324] Scenario Two

[0325] In "Scenario Two," PEI allows the terminal device to receive more SSBs before receiving a paging message, enabling the terminal device to support adaptive SSB reception. Correspondingly, PEI allows the network device to send more SSBs before sending a paging message, enabling the network device to support adaptive SSB transmission.

[0326] The following sections will provide specific explanations regarding terminal devices and network devices.

[0327] For terminal devices, taking the PEI instruction for the terminal device to receive a Type 2 SSB or to receive an SSB according to a second cycle as an example, the terminal device originally received a Type 1 SSB or received an SSB according to a first cycle; then, after the terminal device receives the PEI, the terminal device can receive a Type 2 SSB or receive an SSB according to a second cycle before the terminal device receives a paging.

[0328] In other words, 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. After receiving the PEI, the terminal device can determine 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.

[0329] It should be noted that the SSB burst mentioned in this embodiment can be an on-demand SSB.

[0330] A Type I SSB burst can be understood as one or more Type I SSBs. A Type II SSB burst can be understood as one or more Type II SSBs.

[0331] When the terminal device determines that a Type 1 SSB burst is valid, it means that the terminal device can receive Type 1 SSBs. When the terminal device determines that the period of the SSB burst is the first period, it means that the terminal device can receive SSBs according to the first period. When the terminal device determines that a Type 2 SSB burst is valid, it means that the terminal device can receive Type 2 SSBs. When the terminal device determines that the period of the SSB burst is the second period, the terminal device can receive SSBs according to the second period.

[0332] Receiving a Type I SSB burst by a terminal device is equivalent to receiving at least one Type I SSB within the Type I SSB burst. Receiving an SSB burst by a terminal device is equivalent to receiving at least one SSB within the SSB burst. Receiving a Type II SSB burst by a terminal device is equivalent to receiving at least one Type II SSB within the Type II SSB burst.

[0333] Additionally, PEI is received before the terminal device receives the paging message. The period of a Type I SSB is longer than the period of a Type II SSB. For example, a Type I SSB is a long-period SSB, and a Type II SSB is a short-period SSB. The period of a Type I SSB burst is longer than the period of a Type II SSB burst. For example, a Type I SSB burst is a long-period SSB burst, and a Type II SSB burst is a short-period SSB burst. Furthermore, the first period is longer than the second period. For example, the first period is long, and the second period is short.

[0334] It should be noted that, generally, terminal devices receive long-cycle SSBs or receive SSBs according to a long cycle. Because of the long cycle, the terminal device can receive fewer SSBs. Then, before the network device needs to send a paging request (e.g., to address the terminal device), the network device can instruct the terminal device to receive short-cycle SSBs or receive SSBs according to a short cycle by sending a PEI. In this way, after the terminal device receives the PEI, it can receive short-cycle SSBs or receive SSBs according to a short cycle before receiving the paging request. Because of the short cycle, the terminal device can receive more SSBs.

[0335] As can be seen, after the terminal device receives the PEI, it changes from receiving Type I SSBs to receiving Type II SSBs, or from receiving SSBs according to the first cycle to receiving SSBs according to the second cycle. Since the cycle of Type I SSBs is longer than that of Type II SSBs, and the first cycle is longer than the second cycle, after receiving the PEI, the terminal device can change from receiving fewer SSBs to receiving more SSBs, thus achieving adaptive SSB reception.

[0336] The following example illustrates this, using the terminal device receiving a PEI in the m-th millisecond, time slot, or symbol. Figure 7 As shown, Figure 7 This is a flowchart illustrating another communication method according to an embodiment of this application, specifically including the following steps:

[0337] S710. If the terminal device receives a PEI in the m-th millisecond, time slot, or symbol, and the SSB burst indication information in the PEI is valid, then after the (m+d)-th millisecond, time slot, or symbol, the terminal device determines that the second type of SSB burst is valid, or after the (m+d)-th millisecond, time slot, or symbol, the terminal device 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.

[0338] It should be noted that prior to S710, terminal devices could determine that the first type of SSB burst was valid or that the period of the SSB burst was the first period.

[0339] Additionally, after receiving the PEI in the m-th millisecond, time slot, or symbol, the terminal device may require a delay of d milliseconds, time slots, or symbols to determine whether the Type 2 SSB burst is valid or whether the SSB burst period is the second period. When d is 0, this indicates that the terminal device determines whether the Type 2 SSB burst is valid or whether the SSB burst period has changed from the first period to the second period after the m-th millisecond, time slot, or symbol.

[0340] The SSB burst indication information can indicate whether a Type II SSB burst or an SSB burst with a second period is valid. When the SSB burst indication information is valid, it means that either a Type II SSB burst or an SSB burst with a second period is valid. Thus, the terminal device can determine whether a Type II SSB burst is valid or whether the SSB burst period is the second period based on the valid SSB burst indication information. Optionally, the valid value can be 0 or 1.

[0341] As can be seen, 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 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 SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from receiving fewer SSBs to receiving more SSBs, thereby achieving adaptive SSB reception. In addition, since the (m+d)th millisecond, time slot, or symbol is highly likely to occur 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 second period of SSB burst before the PF / PO. Thus, the terminal device can achieve downlink time-frequency synchronization as quickly as possible and start receiving paging bursts as soon as possible through the second type of SSB burst or the second period of SSB burst.

[0342] For network devices, taking the PEI instruction to the terminal device to receive the second type of SSB or to receive the SSB according to the second cycle as an example, the network device originally sends the first type of SSB or sends the SSB according to the first cycle; then, after the network device finishes sending the PEI, the network device can send the second type of SSB or send the SSB according to the second cycle before the network device sends the paging.

[0343] In other words, the network device can determine whether the first type of SSB burst is valid or whether the SSB burst period is the first period. After the network device sends the PEI, it can determine whether the second type of SSB burst is valid or whether the SSB burst period changes from the first period to the second period.

[0344] It should be noted that when a network device determines that a Type 1 SSB burst is valid, it means that the network device can send Type 1 SSBs. When a network device determines that the period of an SSB burst is the first period, it means that the network device can send SSBs according to the first period. When a network device determines that a Type 2 SSB burst is valid, it means that the network device can send Type 2 SSBs. When a network device determines that the period of an SSB burst is the second period, the network device can send SSBs according to the second period.

[0345] Sending a Type 1 SSB burst by a network device is equivalent to sending at least one Type 1 SSB within a Type 1 SSB burst. Sending an SSB burst by a network device is equivalent to sending at least one SSB within a Type 1 SSB burst. Sending a Type 2 SSB burst by a network device is equivalent to sending at least one Type 2 SSB within a Type 2 SSB burst.

[0346] Additionally, the PEI is sent before the network device sends a paging message. The period of a Type I SSB is longer than the period of a Type II SSB. For example, a Type I SSB is a long-period SSB, and a Type II SSB is a short-period SSB. The period of a Type I SSB burst is longer than the period of a Type II SSB burst. For example, a Type I SSB burst is a long-period SSB burst, and a Type II SSB burst is a short-period SSB burst. Furthermore, the first period is longer than the second period. For example, the first period is long, and the second period is short.

[0347] It should be noted that, generally, network devices send long-cycle SSBs or send SSBs according to a long cycle. Because of the long cycle, the network device can send fewer SSBs. Then, before the network device needs to send a paging request (e.g., to address a terminal device), it can instruct the terminal device to receive short-cycle SSBs or receive SSBs according to a short cycle by sending a PEI. Thus, after sending the PEI, the network device can send short-cycle SSBs or send SSBs according to a short cycle before sending a paging request. Because of the short cycle, the network device can send more SSBs.

[0348] As can be seen, after the network device sends the PEI, it can switch from sending Type I SSBs to sending Type II SSBs, or from sending SSBs according to the first cycle to sending SSBs according to the second cycle. Since the cycle of Type I SSBs is longer than that of Type II SSBs, and the first cycle is longer than the second cycle, the network device can switch from sending fewer SSBs to sending more SSBs after sending the PEI, thus achieving adaptive SSB transmission.

[0349] The following example illustrates this, using the scenario of a network device sending a PEI in the m-th millisecond, time slot, or symbol. Figure 8 As shown, Figure 8 This is a flowchart illustrating another communication method according to an embodiment of this application, specifically including the following steps:

[0350] S810. Determine that the SSB burst indication information in the PEI is valid, and send the PEI; if the network device finishes sending the PEI in the m-th 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, where m is a positive integer and d is an integer greater than or equal to 0.

[0351] It should be noted that prior to S810, network devices could determine whether the first type of SSB burst was valid or whether the period of the SSB burst was the first period.

[0352] Additionally, after transmitting the PEI in the m-th millisecond, time slot, or symbol, the network device may require a delay of d milliseconds, time slots, or symbols to determine whether the Type 2 SSB burst is valid or whether the SSB burst period is the second period. When d is 0, this indicates that the network device determines whether the Type 2 SSB burst is valid or whether the SSB burst period has changed from the first period to the second period after the m-th millisecond, time slot, or symbol.

[0353] SSB burst indication information can indicate whether a Type 2 SSB burst or an SSB burst with a second period is valid. When the SSB burst indication information is valid, it means that a Type 2 SSB burst or an SSB burst with a second period is valid. Thus, network devices can use a valid SSB burst indication information to tell terminal devices whether a Type 2 SSB burst is valid or whether the SSB burst period is the second period. Optionally, the valid value can be 0 or 1.

[0354] As can be seen, 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 SSB burst period has changed from the first period to the second period, the network device can send the second type of SSB or send SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows it to change from sending fewer SSBs to sending more, thus achieving adaptive SSB transmission. Furthermore, since the (m+d)th millisecond, time slot, or symbol is highly likely to occur before the PF or PO associated with the PEI, the network device can send the second type of SSB burst or the second period of SSB burst before the PF / PO. This allows the network device to quickly synchronize downlink time and frequency with the terminal device and begin paging as soon as possible.

[0355] The following is about the above. Figure 7 and Figure 8 The example of 'd' is provided below.

[0356] In some possible examples, d can be a preset value, a value indicated by the network device from a plurality of preset values ​​via signaling, or a value selected by the terminal device from a plurality of preset values ​​based on its own capabilities. In this case, the terminal device's own capabilities have already been communicated to the network device via higher-layer signaling, ensuring consistency between the two.

[0357] Scenario 3

[0358] In "Scenario 3," PEI allows the terminal device to receive more SSBs before receiving a paging message, enabling the terminal device to support adaptive SSB reception. Correspondingly, PEI allows the network device to send more SSBs before sending a paging message, enabling the network device to support adaptive SSB transmission.

[0359] The following sections will provide specific explanations regarding terminal devices and network devices.

[0360] For terminal devices, taking the PEI instructing the terminal device to receive a Type 2 SSB or to receive an SSB according to the second cycle as an example, the terminal device originally received a Type 1 SSB or received an SSB according to the first cycle; then, after the start frame of the paging cycle in which the PF associated with the PEI is located, the terminal device can receive a Type 2 SSB or receive an SSB according to the second cycle before the terminal device receives a paging message.

[0361] In other words, the terminal device can determine that a Type I SSB burst is valid or that the SSB burst period is the first period. After the start frame of the paging period within which the PF associated with the PEI is located, the terminal device can determine that a Type II SSB burst is valid or that the SSB burst period changes from the first period to the second period. Furthermore, the PEI is received before the terminal device receives the paging message. The period of a Type I SSB is longer than the period of a Type II SSB. For example, a Type I SSB may be a long-period SSB, and a Type II SSB may be a short-period SSB. The first period is longer than the second period. For example, a long period may be a long period, and a short period may be a short period.

[0362] It should be noted that, generally, the terminal device receives long-period SSBs or receives SSBs according to a long period. Because of the long period, the terminal device can receive fewer SSBs. Then, before the network device needs to send a paging request (e.g., to address the terminal device), the network device can instruct the terminal device to receive short-period SSBs or receive SSBs according to a short period by sending a PEI. In this way, after the start frame of the paging period in which the PF associated with the PEI is located, the terminal device can receive short-period SSBs or receive SSBs according to a short period before receiving the paging request. Because of the short period, the terminal device can receive more SSBs.

[0363] As can be seen, after the start frame of the paging period containing the PF associated with the PEI, the terminal device changes from receiving Type I SSBs to receiving Type II SSBs, or from receiving SSBs according to the first period to receiving SSBs according to the second period. Since the period of Type I SSBs is longer than that of Type II SSBs, and the first period is longer than the second period, after the start frame of the paging period containing the PF associated with the PEI, the terminal device can change from receiving fewer SSBs to receiving more SSBs, thus achieving adaptive SSB reception.

[0364] The following example illustrates this, using the first start frame as the start frame within the paging cycle of the PF associated with the PEI. Figure 9 As shown, Figure 9 This is a flowchart illustrating another communication method according to an embodiment of this application, specifically including the following steps:

[0365] S910. If the terminal device receives a PEI and the SSB burst indication information in the PEI is valid, then after the first start frame, the terminal device determines that the second type of SSB burst is valid, or after the first start frame, the terminal device determines that the period of the SSB burst is changed from the first period to the second period.

[0366] It should be noted that prior to S910, terminal devices could determine that the first type of SSB burst was valid or that the period of the SSB burst was the first period.

[0367] Additionally, the SSB burst indication information can indicate whether a Type II SSB burst or an SSB burst with a second period is valid. When the SSB burst indication information is valid, it means that a Type II SSB burst or an SSB burst with a second period is valid. Thus, the terminal device can determine whether a Type II SSB burst is valid or whether the SSB burst period is the second period based on the valid SSB burst indication information. Optionally, the valid value can be 0 or 1.

[0368] In addition, the second type of SSB burst or the SSB burst with the period changing to the second period can be configured by the network device for the terminal device in the connected state, and can be shared with the terminal device in the idle / inactive state (i.e. the terminal device receiving PEI / paging).

[0369] As can be seen, since the terminal device determines that the SSB burst period changes from the first period to the second period after the first start frame, it can receive the second type of SSB or receive SSBs according to the second period after the first start frame. This allows it to change from receiving fewer SSBs to receiving more SSBs, thus achieving adaptive SSB reception. Furthermore, since the first start frame is the start frame within the paging period of the PF associated with the PEI, the terminal device can quickly achieve downlink time-frequency synchronization and begin paging reception using the second type of SSB burst or the second period's SSB burst.

[0370] For network devices, taking the PEI instructing the terminal device to receive a Type 2 SSB or an SSB according to the second cycle as an example, the network device originally sends a Type 1 SSB or an SSB according to the first cycle; then, after the start frame of the paging cycle in which the PF associated with the PEI is located, the network device can send a Type 2 SSB or an SSB according to the second cycle before sending a paging message.

[0371] In other words, the network device can determine that a Type I SSB burst is valid or that the SSB burst period is the first period. After the start frame of the paging period in which the PF associated with the PEI is located, the network device can determine that a Type II SSB burst is valid or that the SSB burst period changes from the first period to the second period. Furthermore, the PEI is sent before the network device sends the paging message. The period of a Type I SSB is longer than the period of a Type II SSB. For example, a Type I SSB may be a long-period SSB, and a Type II SSB may be a short-period SSB. The first period is longer than the second period. For example, a long period may be a long period, and a short period may be a short period.

[0372] It should be noted that, generally, network devices send long-period SSBs or send SSBs according to a long period. Because of the long period, the network device can send fewer SSBs. Then, before the network device needs to send a paging request (e.g., to address a terminal device), it can instruct the terminal device to receive short-period SSBs or receive SSBs according to a short period by sending a PEI. Thus, after the start frame of the paging period in which the PF associated with the PEI is located, the network device can send short-period SSBs or receive SSBs according to a short period before sending a paging request. Because of the short period, the network device can send more SSBs.

[0373] As can be seen, after the start frame of the paging period containing the PF associated with the PEI, the network device changes from sending Type I SSBs to sending Type II SSBs, or from sending SSBs according to the first period to sending SSBs according to the second period. Since the period of Type I SSBs is longer than that of Type II SSBs, and the first period is longer than the second period, after the start frame of the paging period containing the PF associated with the PEI, the network device can change from sending fewer SSBs to sending more SSBs, thus achieving adaptive SSB transmission.

[0374] The following example illustrates this, using the first start frame as the start frame within the paging cycle of the PF associated with the PEI. Figure 10 As shown, Figure 10 This is a flowchart illustrating another communication method according to an embodiment of this application, specifically including the following steps:

[0375] S1010. Determine that the SSB burst indication information in the PEI is valid, 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.

[0376] It should be noted that prior to S1010, network devices could determine that the first type of SSB burst was valid or that the period of the SSB burst was the first period.

[0377] Additionally, the SSB burst indication information can indicate whether a Type 2 SSB burst or an SSB burst with a second period is valid. When the SSB burst indication information is valid, it means that a Type 2 SSB burst or an SSB burst with a second period is valid. Thus, network devices can use a valid SSB burst indication information to inform terminal devices whether a Type 2 SSB burst is valid or whether the SSB burst period is the second period. Optionally, the valid value can be 0 or 1.

[0378] In addition, the second type of SSB burst or the SSB burst with the period changing to the second period can be configured by the network device for the terminal device in the connected state, and can be shared with the terminal device in the idle / inactive state (i.e. the terminal device receiving PEI / paging).

[0379] As can be seen, since the network device determines that the SSB burst period changes from the first period to the second period after the first start frame, the network device can send second-type SSBs or receive SSBs according to the second period after the first start frame, thus changing from sending fewer SSBs to sending more SSBs, thereby achieving adaptive SSB transmission. Furthermore, since the first start frame is the start frame within the paging period of the PF associated with the PEI, the network device can quickly achieve downlink time-frequency synchronization with the terminal device and start paging as soon as possible through the second-type SSB burst or the second-period SSB burst.

[0380]

Example 3

[0381] In “Example 3”, this embodiment can use paging instructions to specifically explain, from different situations, whether the terminal device supports adaptive PRACH transmission, the network device supports adaptive PRACH reception, the terminal device supports adaptive SSB reception, and the network device supports adaptive PRACH transmission.

[0382]

Scenario 1

[0383] In “Scenario 1”, the instructions for paging are used to explain whether the terminal device supports adaptive PRACH transmission or the network device supports adaptive PRACH reception.

[0384] For a terminal device, taking a paging instruction to send a Type 2 PRACH or send a PRACH according to the second cycle as an example, the terminal device originally sent a Type 1 PRACH or sent a PRACH according to the first cycle; then, after receiving a paging, the terminal device can send a Type 2 PRACH or send a PRACH according to the second cycle.

[0385] In other words, the terminal device can determine that the first type of PRACH resource is valid or that the PRACH resource period is the first period. After receiving a paging request, the terminal device can determine that the second type of PRACH resource is valid or that the PRACH resource period changes from the first period to the second period.

[0386] Furthermore, the period of Type I PRACH is longer than that of Type II PRACH. For example, Type I PRACH has a long period, while Type II PRACH has a short period.

[0387] It should be noted that, generally, the terminal device sends long-term PRACH messages or sends PRACH messages with a long duration. Because of the long duration, the terminal device can send fewer PRACH messages. Then, when the network device needs to send a paging message (e.g., to address the terminal device), the network device can instruct the terminal device to send short-term PRACH messages or send PRACH messages with a short duration by sending a paging message. Thus, when the terminal device receives a paging message, it can send short-term PRACH messages or send PRACH messages with a short duration after receiving the paging message. Because of the short duration, the terminal device can send more PRACH messages.

[0388] As can be seen, after receiving a paging request, the terminal device changes from sending Type I PRACH to sending Type II PRACH, or from sending PRACH according to the first cycle to sending PRACH according to the second cycle. Since the period of Type I SSB is longer than that of Type II SSB, and the first cycle is longer than the second cycle, the terminal device can change from sending fewer PRACH to sending more PRACH after receiving a paging request, thus achieving adaptive PRACH transmission.

[0389] The following example illustrates this, using the scenario where a terminal device receives a paging message in the m-th millisecond, time slot, or symbol. Figure 11 As shown, Figure 11 This is a flowchart illustrating another communication method according to an embodiment of this application, specifically including the following steps:

[0390] S1110. If the terminal device receives a paging message in the m-th millisecond, time slot, or symbol, and the PRACH resource indication information in the paging message is valid, then after the (m+d)-th millisecond, time slot, or symbol, the terminal device determines that the second type of PRACH resource is valid, or after the (m+d)-th millisecond, time slot, or symbol, the terminal device 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.

[0391] It should be noted that prior to S1110, the terminal device could determine that the first type of PRACH resource was valid or that the period of the PRACH resource was the first period.

[0392] Additionally, after receiving a paging message in the m-th millisecond, time slot, or symbol, the terminal device may require a delay of d milliseconds, time slots, or symbols to determine whether the Type 2 PRACH resource is valid or whether the PRACH resource period has changed to the second period. When d is 0, this indicates that the terminal device determines whether the Type 2 PRACH resource is valid or whether the PRACH resource period has changed from the first period to the second period after the m-th millisecond, time slot, or symbol.

[0393] 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. This can be interpreted as the terminal device determining that, starting from the most recent PRACH resource, the period of the PRACH resource changes from the first period to the second period.

[0394] Additionally, the PRACH resource indication information can indicate whether a Type II PRACH resource or a PRACH resource with a second period is valid. When the PRACH resource indication information is valid, it indicates that either the Type II PRACH resource or the PRACH resource with a second period is valid. Thus, the terminal device can determine whether the Type II PRACH resource is valid or whether the PRACH resource period is the second period based on the valid PRACH resource indication information. Optionally, the valid value can be 0 or 1.

[0395] As can be seen, 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 after the (m+d)th millisecond, time slot, or symbol, the terminal device determines that the period of the PRACH resource has changed from the first period to the second period, the terminal device can send the second type of PRACH or send PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from sending fewer PRACH to sending more PRACH, thereby realizing adaptive PRACH transmission.

[0396] For network devices, taking the paging instruction terminal device to send Type 2 PRACH or send PRACH according to the second cycle as an example, the network device originally received Type 1 PRACH or received PRACH according to the first cycle; then, when the network device finishes sending the paging, the network device can receive Type 2 PRACH or receive PRACH according to the second cycle after the network device has finished sending the paging.

[0397] In other words, the network device can determine that the Type 1 PRACH resource is valid or that the PRACH resource period is the first period. After the network device sends the paging message, it can determine that the Type 2 PRACH resource is valid or that the PRACH resource period changes from the first period to the second period.

[0398] Furthermore, the period of Type I PRACH is longer than that of Type II PRACH. For example, Type I PRACH has a long period, while Type II PRACH has a short period.

[0399] It should be noted that, generally, network devices receive long-cycle PRACH messages or receive PRACH messages according to a long cycle. Because of the long cycle, the network device can receive fewer PRACH messages. Then, when the network device needs to send a paging request (e.g., to address a terminal device), it can instruct the terminal device to send a short-cycle PRACH message or receive PRACH messages according to a short cycle by sending a paging request. Thus, after the network device finishes sending the paging request, it can receive short-cycle PRACH messages or receive PRACH messages according to a short cycle afterward. Because of the short cycle, the network device can receive more PRACH messages.

[0400] As can be seen, after the network device sends a paging message, it changes from receiving Type I PRACH to receiving Type II PRACH, or from receiving PRACH according to the first cycle to receiving PRACH according to the second cycle. Since the period of Type I SSB is longer than that of Type II SSB, and the first cycle is longer than the second cycle, the network device can change from receiving fewer PRACH to receiving more PRACH after sending the paging message, thus achieving adaptive PRACH reception.

[0401] The following example illustrates this, assuming the network device completes sending the paging message in the m-th millisecond, time slot, or symbol. Figure 12 As shown, Figure 12 This is a flowchart illustrating another communication method according to an embodiment of this application, specifically including the following steps:

[0402] S1210. Determine that the PRACH resource indication information in the paging is valid, and send 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, 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 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.

[0403] It should be noted that prior to S1210, network devices could determine whether the first type of PRACH resource was valid or whether the period of the PRACH resource was the first period.

[0404] Additionally, after sending the paging message on the m-th millisecond, time slot, or symbol, the network device may require a delay of d milliseconds, time slots, or symbols to determine whether the Type 2 PRACH resource is valid or whether the PRACH resource period has changed to the second period. When d is 0, this indicates that the network device determines the Type 2 PRACH resource is valid or the PRACH resource period has changed from the first period to the second period after the m-th millisecond, time slot, or symbol.

[0405] 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. This can be expressed as follows: 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, starting from the most recent PRACH resource.

[0406] Additionally, the PRACH resource indication information can indicate whether a Type 2 PRACH resource or a PRACH resource with a second period is valid. When the PRACH resource indication information is valid, it means that either a Type 2 PRACH resource or a PRACH resource with a second period is valid. Thus, network devices can use a valid PRACH resource indication information to inform terminal devices whether a Type 2 PRACH resource is valid or whether the PRACH resource period is the second period. Optionally, the valid value can be 0 or 1.

[0407] As can be seen, 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 PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from receiving fewer PRACH to receiving more PRACH, thereby realizing adaptive PRACH reception.

[0408] The following is about the above. Figure 11 and Figure 12 The example of 'd' is provided below.

[0409] In some possible examples, d can be a preset value, a value indicated by the network device from a plurality of preset values ​​via signaling, or a value selected by the terminal device from a plurality of preset values ​​based on its own capabilities. In this case, the terminal device's own capabilities have already been communicated to the network device via higher-layer signaling, ensuring consistency between the two.

[0410] The following is about Figure 11 and Figure 12 The example illustrates the PRACH resource indication information within the paging process.

[0411] In some possible examples, for PRACH resource indication information within a paging, the PRACH resource indication information occupies reserved bits within the paging.

[0412] For example, taking paging as Paging PDCCH or Paging DCI, PRACH resource indication information occupies reserved bits within Paging PDCCH or Paging DCI.

[0413] It should be noted that, since there are relatively few reserved bits in the paging PDCCH or paging DCI, when the tracking reference signal (TRS) used by the idle / inactive terminal device uses M (M is a positive integer) reserved bits, there are only (6-M) reserved bits in the paging PDCCH or paging DCI in the non-shared spectrum scenario, or only (8-M) reserved bits in the paging PDCCH or paging DCI in the shared spectrum scenario.

[0414] In some possible examples, for PRACH resource indication information within a paging, the PRACH resource indication information occupies the remaining bits in the short message within the paging.

[0415] For example, taking paging as PDCCH or PCI as an example, PRACH resource indication information occupies the remaining bits in the short message within the PDCCH or PCI.

[0416] It should be noted that the remaining reserved bits in the paging PDCCH or paging DCI may be 0. For example, when the TRS used by the idle / inactive terminal device uses M reserved bits and M=6, the remaining reserved bits in the non-shared spectrum scenario are 0. In this case, this embodiment can consider that the PRACH resource indication information occupies the remaining bits in the short message in the paging PDCCH or 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 system information update information, the second bit is occupied by earthquake and tsunami warning system (ETWS) and commercial mobile alert system (CMAS) indication information, the third bit is occupied by paging monitoring stop information, the fourth bit is occupied by extended discontinuous reception (eDRX) system information update information, and the fifth to eighth bits are the remaining bits.

[0417] For example, the PRACH resource indication information occupies one or more remaining bits in the short message. If the codepoint of these one or more bits is a preset value, then the PRACH resource indication information is a valid value.

[0418] Table 1

[0419]

[0420]

Scenario 2

[0421] In "Scenario 2," the paging instruction allows the terminal device to receive more SSBs before receiving the RAR, enabling the terminal device to support adaptive SSB reception. Similarly, the paging instruction allows the network device to send more SSBs before sending the RAR, enabling the network device to support adaptive SSB transmission.

[0422] The following sections will provide specific explanations regarding terminal devices and network devices.

[0423] For terminal devices, taking a paging instruction to the terminal device to receive a Type 2 SSB or to receive an SSB according to the second cycle as an example, the terminal device originally received a Type 1 SSB or received an SSB according to the first cycle; then, when the terminal device receives a paging, the terminal device can receive a Type 2 SSB or receive an SSB according to the second cycle before the terminal device receives a RAR.

[0424] In other words, the terminal device can determine that the first type of SSB burst is valid or that the SSB burst period is the first period. After receiving a paging request, the terminal device can determine that the second type of SSB burst is valid or that the SSB burst period changes from the first period to the second period.

[0425] Furthermore, the period of a Type I SSB is longer than that of a Type II SSB. For example, a Type I SSB is a long-period SSB, while a Type II SSB is a short-period SSB. The first period is longer than the second period. For example, the first period is long-period, and the second period is short-period.

[0426] It should be noted that, generally, terminal devices receive long-cycle SSBs or receive SSBs according to a long cycle. Because of the long cycle, the terminal device can receive fewer SSBs. Then, when the network device needs to send a paging message (e.g., to address the terminal device), the network device can instruct the terminal device to receive short-cycle SSBs or receive SSBs according to a short cycle by sending a paging message. Thus, when the terminal device receives a paging message, it can receive either short-cycle SSBs or receive SSBs according to a short cycle. Because of the short cycle, the terminal device can receive more SSBs.

[0427] As can be seen, after receiving a paging message, the terminal device changes from receiving Type I SSBs to receiving Type II SSBs, or from receiving SSBs according to the first cycle to receiving SSBs according to the second cycle. Since the cycle of Type I SSBs is longer than that of Type II SSBs, and the first cycle is longer than the second cycle, when the terminal device receives a paging message, it can change from receiving fewer SSBs to receiving more SSBs, thus achieving adaptive SSB reception.

[0428] The following example illustrates this, using the scenario where a terminal device receives a paging message in the m-th millisecond, time slot, or symbol. Figure 13 As shown, Figure 13 This is a flowchart illustrating another communication method according to an embodiment of this application, specifically including the following steps:

[0429] S1310. If the terminal device receives a paging message in the m-th millisecond, time slot, or symbol, and the SSBburst indication information in the paging message is valid, then after the (m+d)-th millisecond, time slot, or symbol, the terminal device determines that the second type of SSBburst is valid, or after the (m+d)-th millisecond, time slot, or symbol, the terminal device 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.

[0430] It should be noted that prior to S1310, the terminal device could determine that the first type of SSB burst was valid or that the period of the SSB burst was the first period.

[0431] Additionally, after receiving a paging message in the m-th millisecond, time slot, or symbol, the terminal device may require a delay of d milliseconds, time slots, or symbols to determine whether the Type 2 SSB burst is valid or whether the SSB burst period is the second period. When d is 0, this indicates that the terminal device determines whether the Type 2 SSB burst is valid or whether the SSB burst period has changed from the first period to the second period after the m-th millisecond, time slot, or symbol.

[0432] The SSB burst indication information can indicate whether a Type II SSB burst or an SSB burst with a second period is valid. When the SSB burst indication information is valid, it means that either a Type II SSB burst or an SSB burst with a second period is valid. Thus, the terminal device can determine whether a Type II SSB burst is valid or whether the SSB burst period is the second period based on the valid SSB burst indication information. Optionally, the valid value can be 0 or 1.

[0433] As can be seen, 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 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 SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from receiving fewer SSBs to receiving more SSBs, thereby achieving adaptive SSB reception. Furthermore, since the (m+d)th millisecond, time slot, or symbol is highly 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 second period of the SSB burst before the time domain position of the PRACH resource. Therefore, the terminal device can achieve downlink time-frequency synchronization and start transmitting PRACH as quickly as possible through the second type of SSB burst or the second period of the SSB burst.

[0434] For network devices, taking the paging instruction terminal device to receive Type 2 SSB or receive SSB according to the second cycle as an example, the network device originally sends Type 1 SSB or sends SSB according to the first cycle; then, when the network device finishes sending the paging, the network device can send Type 2 SSB or send SSB according to the second cycle before the network device sends RAR.

[0435] In other words, the network device can determine whether the first type of SSB burst is valid or whether the SSB burst period is the first period. After the network device sends the paging message, it can determine whether the second type of SSB burst is valid or whether the SSB burst period changes from the first period to the second period.

[0436] Furthermore, the period of a Type I SSB is longer than that of a Type II SSB. For example, a Type I SSB is a long-period SSB, while a Type II SSB is a short-period SSB. The first period is longer than the second period. For example, the first period is long-period, and the second period is short-period.

[0437] It should be noted that, generally, network devices send long-cycle SSBs or send SSBs according to a long cycle. Because of the long cycle, the network device can send fewer SSBs. Then, when the network device needs to send a paging message (e.g., to address a terminal device), it can instruct the terminal device to receive short-cycle SSBs or receive SSBs according to a short cycle by sending a paging message. Thus, after the network device finishes sending the paging message, it can send short-cycle SSBs or send SSBs according to a short cycle. Because of the short cycle, the network device can send more SSBs.

[0438] As can be seen, after the network device sends the paging message, it can switch from sending Type I SSBs to sending Type II SSBs, or from sending SSBs according to the first cycle to sending SSBs according to the second cycle. Since the cycle of Type I SSBs is longer than that of Type II SSBs, and the first cycle is longer than the second cycle, the network device can change from sending fewer SSBs to sending more SSBs after sending the paging message, thus achieving adaptive SSB sending.

[0439] The following example illustrates this, using the scenario of a network device sending a paging message in the m-th millisecond, time slot, or symbol. Figure 14 As shown, Figure 14 This is a flowchart illustrating another communication method according to an embodiment of this application, specifically including the following steps:

[0440] S1410. Determine that the SSB burst indication information in the paging is valid, and send 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, 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, where m is a positive integer and d is an integer greater than or equal to 0.

[0441] It should be noted that prior to S1410, network devices could determine that the first type of SSB burst was valid or that the period of the SSB burst was the first period.

[0442] Additionally, after sending the paging message in the m-th millisecond, time slot, or symbol, the network device may require a delay of d milliseconds, time slots, or symbols to determine whether the Type 2 SSB burst is valid or whether the SSB burst period is the second period. When d is 0, this indicates that the network device determines whether the Type 2 SSB burst is valid or whether the SSB burst period has changed from the first period to the second period after the m-th millisecond, time slot, or symbol.

[0443] SSB burst indication information can indicate whether a Type 2 SSB burst or an SSB burst with a second period is valid. When the SSB burst indication information is valid, it means that a Type 2 SSB burst or an SSB burst with a second period is valid. Thus, network devices can use a valid SSB burst indication information to tell terminal devices whether a Type 2 SSB burst is valid or whether the SSB burst period is the second period. Optionally, the valid value can be 0 or 1.

[0444] Furthermore, a Type 2 SSB burst can be understood as one or more Type 2 SSBs. When a Type 2 SSB burst is valid, it means the network device can send a Type 2 SSB burst. When the period of the SSB burst is the second period, it means the network device can send SSB bursts according to the second period. Specifically, sending a Type 2 SSB burst is equivalent to sending at least one Type 2 SSB within the Type 2 SSB burst, and sending an SSBburst is equivalent to sending at least one SSB within the SSB burst.

[0445] As can be seen, 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 SSB burst period has changed from the first period to the second period, the network device can send the second type of SSB or send SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows it to change from sending fewer SSBs to sending more, thus achieving adaptive SSB transmission. Furthermore, since the (m+d)th millisecond, time slot, or symbol is highly likely to occur before the time domain position of the PRACH resource, the network device can send the second type of SSB burst or the second period of SSB burst before the time domain position of the PRACH resource. Therefore, the network device can use the second type of SSB burst or the second period of SSB burst to quickly achieve downlink time-frequency synchronization with the terminal device and start receiving PRACH as soon as possible.

[0446] The following is about the above. Figure 13 and Figure 14 The example of 'd' is provided below.

[0447] In some possible examples, d can be a preset value, a value indicated by the network device from a plurality of preset values ​​via signaling, or a value selected by the terminal device from a plurality of preset values ​​based on its own capabilities. In this case, the terminal device's own capabilities have already been communicated to the network device via higher-layer signaling, ensuring consistency between the two.

[0448] The following is about Figure 13 and Figure 14 The example illustrates the PRACH resource indication information within the paging process.

[0449] In some possible examples, for SSB burst indication information within a paging, the SSB burst indication information occupies reserved bits within the paging.

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

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

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

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

[0454] It should be noted that the remaining reserved bits in the paging PDCCH or paging DCI may be 0. For example, when the TRS used by the idle / inactive terminal device uses M reserved bits and M=6, the remaining reserved bits in the non-shared spectrum scenario are 0. In this case, this 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 one or more remaining bits in the short message. If the code point of these one or more bits is a preset value, then the SSB burst indication information is a valid value.

[0455]

Scenario 3

[0456] In "Scenario 3", through paging instructions, the terminal device can receive more SSBs before receiving the RAR, so as to enable the terminal device to support adaptive SSB reception. Correspondingly, through paging instructions, the network device can send more SSBs before sending the RAR, so as to enable the network device to support adaptive SSB transmission.

[0457] The following sections will provide specific explanations regarding terminal devices and network devices.

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

[0459] In other words, 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. After the start frame of the paging period in which the paging associated PF is located, the terminal device can determine 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.

[0460] Furthermore, the period of a Type I SSB is longer than that of a Type II SSB. For example, a Type I SSB is a long-period SSB, while a Type II SSB is a short-period SSB. The first period is longer than the second period. For example, the first period is long-period, and the second period is short-period.

[0461] It should be noted that, generally, the terminal device receives long-period SSBs or receives SSBs according to a long period. Because of the long period, the terminal device can receive fewer SSBs. Then, before the network device needs to send a paging request (e.g., to address the terminal device), the network device can instruct the terminal device to receive short-period SSBs or receive SSBs according to a short period by sending a PEI. In this way, after the start frame of the paging period in which the PF associated with the PEI is located, the terminal device can receive short-period SSBs or receive SSBs according to a short period before receiving the paging request. Because of the short period, the terminal device can receive more SSBs.

[0462] As can be seen, after the start frame of the paging period in which the paging-associated PF resides, the terminal device changes from receiving Type I SSBs to receiving Type II SSBs, or from receiving SSBs according to the first period to receiving SSBs according to the second period. Since the period of Type I SSBs is longer than that of Type II SSBs, and the first period is longer than the second period, after the start frame of the paging period in which the paging-associated PF resides, the terminal device can change from receiving fewer SSBs to receiving more SSBs, thus achieving adaptive SSB reception.

[0463] The following example illustrates this using the second start frame as the start frame within the paging cycle of the PF associated with the paging. Figure 15 As shown, Figure 15 This is a flowchart illustrating another communication method according to an embodiment of this application, specifically including the following steps:

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

[0465] It should be noted that prior to S1510, the terminal device could determine that the first type of SSB burst was valid or that the period of the SSB burst was the first period.

[0466] Additionally, the SSB burst indication information can indicate whether a Type II SSB burst or an SSB burst with a second period is valid. When the SSB burst indication information is valid, it means that a Type II SSB burst or an SSB burst with a second period is valid. Thus, the terminal device can determine whether a Type II SSB burst is valid or whether the SSB burst period is the second period based on the valid 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 period changing to the second period can be configured by the network device for the terminal device in the connected state, and can be shared with the terminal device in the idle / inactive state (i.e. the terminal device receiving PEI / paging).

[0468] As can be seen, since the terminal device determines that the SSB burst period changes from the first period to the second period after the second start frame, it can receive the second type of SSB or receive SSBs according to the second period after the second start frame. This allows it to change from receiving fewer SSBs to receiving more SSBs, thus achieving adaptive SSB reception. Furthermore, since the second start frame is the start frame within the paging period of the paging-associated PF, the terminal device can achieve downlink time-frequency synchronization as quickly as possible through the second type of SSB burst or the second period's SSB burst.

[0469] For network devices, taking the paging instruction terminal device to receive a Type 2 SSB or an SSB according to the second cycle as an example, the network device originally sends a Type 1 SSB or sends an SSB according to the first cycle; then, after the start frame of the paging cycle in which the paging associated PF is located, the network device can send a Type 2 SSB or send an SSB according to the second cycle.

[0470] In other words, the network device can determine whether a Type I SSB burst is valid or whether the SSB burst period is the first period. After the start frame of the paging period in which the paging associated PF is located, the network device can determine whether a Type II SSB burst is valid or whether the SSB burst period changes from the first period to the second period.

[0471] Furthermore, the period of a Type I SSB is longer than that of a Type II SSB. For example, a Type I SSB is a long-period SSB, while a Type II SSB is a short-period SSB. The first period is longer than the second period. For example, the first period is long-period, and the second period is short-period.

[0472] It should be noted that, generally, network devices send long-cycle SSBs or send SSBs according to a long cycle. Because of the long cycle, the network device can send fewer SSBs. Then, before the network device needs to send a paging request (e.g., to address a terminal device), it can instruct the terminal device to receive short-cycle SSBs or receive SSBs according to a short cycle by sending a paging request. Thus, after the start frame of the paging period associated with the paging-related PF, the network device can send short-cycle SSBs or receive SSBs according to a short cycle. Because of the short cycle, the network device can send more SSBs.

[0473] As can be seen, after the start frame of the paging period in which the paging-associated PF resides, the network device changes from sending Type I SSBs to sending Type II SSBs, or from sending SSBs according to the first period to sending SSBs according to the second period. Since the period of Type I SSBs is longer than that of Type II SSBs, and the first period is longer than the second period, after the start frame of the paging period in which the paging-associated PF resides, the network device can change from sending fewer SSBs to sending more SSBs, thus achieving adaptive SSB transmission.

[0474] The following example illustrates this using the second start frame as the start frame within the paging cycle of the PF associated with the paging. Figure 16 As shown, Figure 16 This is a flowchart illustrating another communication method according to an embodiment of this application, specifically including the following steps:

[0475] S1610. Determine that the SSB burst indication information in the paging is valid, and send the paging; if the network device has finished sending 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 prior to S1610, network devices could determine that the first type of SSB burst was valid or that the period of the SSB burst was the first period.

[0477] Additionally, the SSB burst indication information can indicate whether a Type 2 SSB burst or an SSB burst with a second period is valid. When the SSB burst indication information is valid, it means that a Type 2 SSB burst or an SSB burst with a second period is valid. Thus, network devices can use a valid SSB burst indication information to inform terminal devices whether a Type 2 SSB burst is valid or whether the SSB burst period is the second period. Optionally, the valid value can be 0 or 1.

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

[0479] As can be seen, since the network device determines that the SSB burst period changes from the first period to the second period after the first start frame, the network device can send second-type SSBs or receive SSBs according to the second period after the first start frame. This allows it to change from sending fewer SSBs to sending more SSBs, thus achieving adaptive SSB transmission. Furthermore, since the second start frame is the start frame within the paging period of the paging PF, the network device can quickly achieve downlink time-frequency synchronization with the terminal device using the second-type SSB burst or the second-period SSB burst.

[0480] The following is about Figure 15 or Figure 16 The example illustrates the PRACH resource indication information within the paging process.

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

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

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

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

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

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

[0487]

Example 4

[0488] In "Example 4", with the instruction of RAR, the terminal device can receive more SSBs before receiving Msg4 or before sending Msg3, so as to enable the terminal device to support adaptive SSB reception. Correspondingly, with the instruction of RAR, the network device can send more SSBs before sending Msg4 or before receiving Msg3, so as to enable the network device to support adaptive SSB transmission.

[0489] It is worth noting that RAR here can be any of RAR PDCCH, RAR DCI, RAR PDSCH, or RAR message.

[0490] The following sections will provide specific explanations regarding terminal devices and network devices.

[0491] For a terminal device, taking the RAR instruction for the terminal device to receive a Type 2 SSB or to receive an SSB according to the second cycle as an example, the terminal device originally received a Type 1 SSB or received an SSB according to the first cycle; then, when the terminal device receives the RAR, the terminal device can receive a Type 2 SSB or receive an SSB according to the second cycle before the terminal device receives Msg4 or before the terminal device sends Msg3.

[0492] In other words, 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. When the terminal device receives a RAR, it can determine 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.

[0493] Furthermore, the period of a Type I SSB is longer than that of a Type II SSB. For example, a Type I SSB is a long-period SSB, while a Type II SSB is a short-period SSB. The first period is longer than the second period. For example, the first period is long-period, and the second period is short-period.

[0494] It should be noted that, generally, the terminal device receives long-period SSBs or receives SSBs according to a long period. Because of the long period, the terminal device can receive fewer SSBs. Then, before the terminal device needs to receive Msg4 or send Msg3, the network device can instruct the terminal device to receive short-period SSBs or receive SSBs according to a short period by sending a RAR. In this way, before the terminal device needs to receive Msg4 or send Msg3, it can receive short-period SSBs or receive SSBs according to a short period. Because of the short period, the terminal device can receive more SSBs.

[0495] As can be seen, after the terminal device receives the RAR, it changes from receiving Type I SSBs to receiving Type II SSBs, or from receiving SSBs according to the first cycle to receiving SSBs according to the second cycle. Since the cycle of Type I SSBs is longer than that of Type II SSBs, and the first cycle is longer than the second cycle, when the terminal device receives the RAR, it can change from receiving fewer SSBs to receiving more SSBs, thus achieving adaptive SSB reception.

[0496] The following example illustrates how a terminal device receives a RAR in the m-th millisecond, time slot, or symbol. Figure 17 As shown, Figure 17 This is a flowchart illustrating another communication method according to an embodiment of this application, specifically including the following steps:

[0497] S1710. If the terminal device receives a RAR in the m-th millisecond, time slot, or symbol, and the SSB burst indication information in the RAR is valid, then after the (m+d)-th millisecond, time slot, or symbol, the terminal device determines that the second type of SSB burst is valid, or after the (m+d)-th millisecond, time slot, or symbol, the terminal device 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.

[0498] It should be noted that prior to S1710, the terminal device could determine that the first type of SSB burst was valid or that the period of the SSB burst was the first period.

[0499] Additionally, after receiving the RAR in the m-th millisecond, time slot, or symbol, the terminal device may require a delay of d milliseconds, time slots, or symbols to determine whether the Type 2 SSB burst is valid or whether the SSB burst period is the second period. When d is 0, this indicates that the network device determines whether the Type 2 SSB burst is valid or whether the SSB burst period has changed from the first period to the second period after the m-th millisecond, time slot, or symbol.

[0500] The SSB burst indication information can indicate whether a Type II SSB burst or an SSB burst with a second period is valid. When the SSB burst indication information is valid, it means that either a Type II SSB burst or an SSB burst with a second period is valid. Thus, the terminal device can determine whether a Type II SSB burst is valid or whether the SSB burst period is the second period based on the valid SSB burst indication information. Optionally, the valid value can be 0 or 1.

[0501] As can be seen, 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 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 SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from receiving fewer SSBs to receiving more SSBs, thereby achieving adaptive SSB reception. 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 second period of SSB burst before Msg4 or Msg3. Therefore, the terminal device can achieve downlink time-frequency synchronization as soon as possible and start receiving Msg4 or starting to transmit Msg3 as soon as possible through the second type of SSB burst or the second period of SSB burst.

[0502] For network devices, taking the RAR instruction to the terminal device to receive the second type of SSB or to receive the SSB according to the second cycle as an example, the network device originally sends the first type of SSB or sends the SSB according to the first cycle; then, after the network device finishes sending the RAR, the network device can send the second type of SSB or send the SSB according to the second cycle before the network device sends Msg4 or before the network device receives Msg3.

[0503] In other words, the network device can determine whether the first type of SSB burst is valid or whether the SSB burst period is the first period. When the network device finishes sending the RAR, it can determine whether the second type of SSB burst is valid or whether the SSB burst period changes from the first period to the second period.

[0504] Furthermore, the period of a Type I SSB is longer than that of a Type II SSB. For example, a Type I SSB is a long-period SSB, while a Type II SSB is a short-period SSB. The first period is longer than the second period. For example, the first period is long-period, and the second period is short-period.

[0505] It should be noted that, generally, network devices send long-cycle SSBs or send SSBs according to a long cycle. Because of the long cycle, the network device can send fewer SSBs. Then, before the network device needs to send Msg4 or receive Msg3, it can instruct the terminal device to receive short-cycle SSBs or receive SSBs according to a short cycle by sending a RAR. Thus, after the network device finishes sending the RAR, it can send short-cycle SSBs or send SSBs according to a short cycle. Because of the short cycle, the network device can send more SSBs.

[0506] As can be seen, after the network device sends the RAR, it changes from sending Type I SSBs to sending Type II SSBs, or from sending SSBs according to the first cycle to sending SSBs according to the second cycle. Since the cycle of Type I SSBs is longer than that of Type II SSBs, and the first cycle is longer than the second cycle, the network device can change from sending fewer SSBs to sending more SSBs after sending the RAR, thus achieving adaptive SSB transmission.

[0507] The following example illustrates how a network device sends a RAR in the m-th millisecond, time slot, or symbol. Figure 18 As shown, Figure 18 This is a flowchart illustrating another communication method according to an embodiment of this application, specifically including the following steps:

[0508] S1810. Determine that the SSB burst indication information in the RAR is valid, and send the RAR; if the network device finishes sending the RAR in the m-th 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, where m is a positive integer and d is an integer greater than or equal to 0.

[0509] It should be noted that prior to S1810, network devices could determine that the first type of SSB burst was valid or that the period of the SSB burst was the first period.

[0510] Additionally, after transmitting the RAR in the m-th millisecond, time slot, or symbol, the network device may require a delay of d milliseconds, time slots, or symbols to determine whether the Type 2 SSB burst is valid or whether the SSB burst period is the second period. When d is 0, this indicates that the network device determines whether the Type 2 SSB burst is valid or whether the SSB burst period has changed from the first period to the second period after the m-th millisecond, time slot, or symbol.

[0511] SSB burst indication information can indicate whether a Type 2 SSB burst or an SSB burst with a second period is valid. When the SSB burst indication information is valid, it means that a Type 2 SSB burst or an SSB burst with a second period is valid. Thus, network devices can use a valid SSB burst indication information to tell terminal devices whether a Type 2 SSB burst is valid or whether the SSB burst period is the second period. Optionally, the valid value can be 0 or 1.

[0512] As can be seen, 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 SSB burst period changes from the first period to the second period, the network device can send the second type of SSB or send SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol. This allows it to change from sending fewer SSBs to sending more, thus achieving adaptive SSB transmission. Furthermore, since the (m+d)th millisecond, time slot, or symbol is before Msg4 or Msg3, the network device can send the second type of SSB burst or the second period of SSB burst before Msg4 or Msg3. Therefore, the network device can use the second type of SSB burst or the second period of SSB burst to quickly synchronize downlink time and frequency with the terminal device and quickly begin sending Msg4 or receiving Msg3.

[0513] The following is about the above. Figure 17 and Figure 18 The example of 'd' is provided below.

[0514] In some possible examples, d can be a preset value, a value indicated by the network device from a plurality of preset values ​​via signaling, or a value selected by the terminal device from a plurality of preset values ​​based on its own capabilities. In this case, the terminal device's own capabilities have already been communicated to the network device via higher-layer signaling, ensuring consistency between the two.

[0515]

Example 5

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

[0517] like Figure 19 As shown, Figure 19 This is a flowchart illustrating another communication method according to an embodiment of this application, specifically including the following steps:

[0518] S1910. The network device sends an indication message indicating whether the PRACH resource indication message is valid or invalid, and whether the SSB burst indication message is valid or invalid.

[0519] In this way, the network indication or network configuration is used to indicate whether the PRACH resource indication information and SSBburst indication information are valid values.

[0520] The following embodiment will explain in detail whether the PRACH resource indication information and SSB burst indication information are valid values ​​under different circumstances.

[0521]

Scenario a

[0522] In "Scenario a", this embodiment considers that the PRACH resource indication information and the SSB burst indication information occupy the same bit in the paging, PEI, or RAR. That is, one bit in the paging, PEI, or RAR 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. In this case, the indication information includes one bit. This one bit 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.

[0523] In this way, one bit can indicate whether the PRACH resource indication information and SSB burst indication information are valid values, which helps to save signaling overhead.

[0524] In some possible examples, one code point of a bit indicates that both the PRACH resource indication information and the SSB burst indication information are valid values; another code point of a bit indicates that the PRACH resource indication information is valid and the SSB burst indication information is invalid, or another code point indicates that both the PRACH resource indication information and the SSB burst indication information are invalid, or another code point indicates that the PRACH resource indication information is invalid and the SSB burst indication information is valid.

[0525] It should be noted that since one bit has two code points, this embodiment can consider one code point indicating that both the PRACH resource indication information and the SSB burst indication information are valid values, and the other code point indicating that the PRACH resource indication information is valid and the SSB burst indication information is invalid, or the other code point indicating that both the PRACH resource indication information and the SSB burst indication information are invalid, or the other code point indicating that the PRACH resource indication information is invalid and the SSB burst indication information is valid.

[0526] For example, as shown in Table 2, a bit has code point 1 and code point 2. Code point 1 indicates that both the PRACH resource indication information and the SSB burst indication information are valid values. Thus, when code point 1 is retrieved, the network device or terminal device can determine that both the PRACH resource indication information and the SSB burst indication information are valid values. Code point 2 indicates that the PRACH resource indication information is valid and the SSB burst indication information is invalid. Thus, when code point 1 is retrieved, the network device or terminal device can determine that the PRACH resource indication information is valid and the SSB burst indication information is invalid.

[0527] Table 2

[0528] One bit of code point describe Code point 1 Both the PRACH resource indication information and the SSB burst indication information are valid values. Code point 2 The PRACH resource indication information is valid, while the SSB burst indication information is invalid.

[0529]

Scenario b

[0530] In "Scenario b", this 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 the two bits in the paging, PEI, or RAR, one bit indicates that the PRACH resource indication information is valid or invalid, while the other bit indicates that the SSB burst indication information is valid or invalid. In this case, the indication information includes two bits. Specifically, one bit indicates that the PRACH resource indication information is valid or invalid, and the other bit indicates that the SSB burst indication information is valid or invalid.

[0531] In this way, these two bits can respectively indicate whether the PRACH resource indication information and the SSB burst indication information are valid values.

[0532] It should be noted that each of these two bits has two code points. Taking the bit indicating PRACH resource indication information as the first bit as an example, since the first bit has two code points, in this embodiment, one code point can be considered to indicate 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.

[0533] For example, as shown in Table 3, the first bit has code point 1 and code point 2. Code point 1 indicates that the PRACH resource indication information is a valid value, so when code point 1 is retrieved, the network device or 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 retrieved, the network device or terminal device can determine that the PRACH resource indication information is not a valid value.

[0534] Table 3

[0535] The code point of the first bit describe Code point 1 The PRACH resource indication information is valid. Code point 2 The PRACH resource indicator information is not valid.

[0536] Taking the second bit as an example, since the second bit has two code points, this embodiment can consider one code point to indicate that the SSB burst indication information is a valid value, and the other code point to indicate that the SSB burst indication information is not a valid value.

[0537] For example, as shown in Table 4, the second bit has code point 1 and code point 2. Code point 1 indicates that the SSB burst indication information is a valid value, so when code point 1 is retrieved, the network device or 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 retrieved, the network device or terminal device can determine that the SSB burst indication information is not a valid value.

[0538] Table 4

[0539] The code point of the second bit describe Code point 1 The SSB burst indication is valid. Code point 2 The SSB burst indication is not valid.

[0540]

Scenario c

[0541] In "Scenario c", this embodiment considers that the PRACH resource indication information and SSB burst indication information occupy the same two bits in the paging, PEI, or RAR. That is, for the two bits in the paging, PEI, or RAR, these two bits indicate 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. In this case, the indication information includes two bits.

[0542] These two bits indicate whether the PRACH resource indication information is valid or invalid, and whether the SSB burst indication information is valid or invalid.

[0543] In this way, these two bits can indicate whether the PRACH resource indication information and the SSB burst indication information are valid values.

[0544] In some possible examples, the first code point of the four code points of the two bits indicates that both the PRACH resource indication information and the SSB burst indication information are valid values; the second code point of the four code points of the two bits indicates that the PRACH resource indication information is valid and the SSB burst indication information is invalid; the third code point of the four code points of the two bits indicates that the PRACH resource indication information is invalid and the SSB burst indication information is valid; the fourth code point of the four code points of the two bits indicates that both the PRACH resource indication information and the SSB burst indication information are invalid values.

[0545] It should be noted that since these two bits have four code points, this embodiment can consider that different code points among these four code points indicate whether the PRACH resource indication information and SSB burst indication information are valid values.

[0546] For example, as shown in Table 5, these two bits have code point 1, code point 2, code point 3 and code point 4. Specifically, code point 1 indicates that both the PRACH resource indication information and the SSB burst indication information are valid values, so when code point 1 is retrieved, the network device or terminal device can determine that both the PRACH resource indication information and the SSB burst indication information are valid values; code point 2 indicates that the PRACH resource indication information is valid and the SSB burst indication information is invalid, so when code point 2 is retrieved, the network device or terminal device can determine that both the PRACH resource indication information and the SSB burst indication information are invalid values; code point 3 indicates that the PRACH resource indication information is invalid and the SSB burst indication information is valid, so when code point 3 is retrieved, the network device or terminal device can determine that both the PRACH resource indication information and the SSB burst indication information are valid values; code point 4 indicates that both the PRACH resource indication information and the SSB burst indication information are invalid, so when code point 4 is retrieved, the network device or terminal device can determine that both the PRACH resource indication information and the SSB burst indication information are invalid values.

[0547] Table 5

[0548] Two-bit code point describe Code point 1 Both the PRACH resource indication information and the SSB burst indication information are valid values. Code point 2 The PRACH resource indication information is valid, while the SSB burst indication information is invalid. Code point 3 The PRACH resource indication information is not a valid value, while the SSB burst indication information is valid. Code point 4 Both the PRACH resource indication information and the SSB burst indication information are invalid.

[0549] In some possible examples, one or more of the four code points of the two bits indicate that both the PRACH resource indication information and the SSB burst indication information are valid values, while one of the four code points of the two bits, other than the one or more code points, indicates that neither the PRACH resource indication information nor the SSB burst indication information is a valid value.

[0550] 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 the period of a second type of PRACH resource and the period of a second type of SSB burst; the second period combination is the second period of a PRACH resource and the second period of an SSB burst; the third period combination is the period of a second type of PRACH resource and the second period of an SSB burst; and the fourth period combination is the second period of a PRACH resource and the period of a second type of SSB burst.

[0551] It should be noted that since these two bits have four code points, this embodiment can consider using one or more of these four code points to indicate that both the PRACH resource indication information and the SSB burst indication information are valid values. These 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 along with the period of the second type of SSB burst or the period of the SSB burst, thereby helping to save signaling overhead.

[0552] In addition, one of the four code points, excluding the one or more code points mentioned above, can indicate that both the PRACH resource indication information and the SSB burst indication information are invalid values.

[0553] For example, as shown in Table 5, these two bits have code point 1, code point 2, code point 3, and code point 4. Code point 1, code point 2, or code point 3 indicates that both the PRACH resource indication information and the SSB burst indication information are valid values, while code point 4 indicates that both the PRACH resource indication information and the SSB burst indication information are invalid values. Furthermore, code point 1, code point 2, or code point 3 also indicates one of the following: a first cycle combination, a second cycle combination, a third cycle combination, or a fourth cycle combination.

[0554] Table 5

[0555]

[0556] Optionally, all options for cycle combinations can be configured by higher-level parameters. This allows all options for cycle combinations to be configured by semi-static signaling, such as SIB or RRC signaling.

[0557] In some possible examples, one or more of the four code points of the two bits indicate that both the PRACH resource indication information and the SSB burst indication information are valid values, while one of the four code points of the two bits, other than the one or more code points, indicates that neither the PRACH resource indication information nor the SSB burst indication information is a valid value.

[0558] 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 duration combination is the duration of a second type of PRACH resource and the duration of a second type of SSB burst; the second duration combination is the second duration of a PRACH resource and the second duration of an SSB burst; the third duration combination is the duration of a second type of PRACH resource and the second duration of an SSB burst; and the fourth duration combination is the second duration of a PRACH resource and the duration of a second type of SSB burst.

[0559] It should be noted that since these two bits have four code points, this embodiment can consider that one or more of these four code points can indicate that both the PRACH resource indication information and the SSB burst indication information are valid values. These one or more code points can also 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 by changing the duration of the second type of SSB burst or the duration of the SSB burst, thereby saving signaling overhead. The second duration of the PRACH resource is shorter than the first duration of the PRACH resource.

[0560] In addition, one of the four code points, excluding the one or more code points mentioned above, can indicate that both the PRACH resource indication information and the SSB burst indication information are invalid values.

[0561] For example, as shown in Table 6, these two bits have code point 1, code point 2, code point 3, and code point 4. Code point 1, code point 2, or code point 3 indicates that both the PRACH resource indication information and the SSB burst indication information are valid values, while code point 4 indicates that both the PRACH resource indication information and the SSB burst indication information are invalid values. Furthermore, code point 1, code point 2, or code point 3 also indicates one of the following duration combinations: a first duration combination, a second duration combination, a third duration combination, or a fourth duration combination.

[0562] Table 6

[0563]

[0564] Optionally, all options for duration combinations are configured by higher-level parameters. This allows all options for duration combinations to be configured by semi-static signaling, such as SIB or RRC signaling.

[0565]

Scenario d

[0566] In "Scenario d", this embodiment considers that the PRACH resource indication information and 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 of these three bits indicate that the PRACH resource indication information is valid or invalid, and the remaining bit indicates that the SSB burst indication information is valid or invalid. In this case, the indication information includes three bits.

[0567] Of these three bits, two indicate that the PRACH resource indication information is valid or invalid, and the remaining bit indicates that the SSB burst indication information is valid or invalid.

[0568] In this way, these three bits can respectively indicate whether the PRACH resource indication information and the SSB burst indication information are valid values.

[0569] In some possible examples, for two bits indicating that the PRACH resource indication information is or is not a valid value, one or more of the four code points of the two bits indicate that the PRACH resource indication information is a valid value, and one 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.

[0570] It should be noted that since these two bits have four code points, this embodiment can consider that one or more of these four code points can indicate that the PRACH resource indication information is a valid value, and these 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 along with the PRACH resource period, thereby helping to save signaling overhead. Additionally, one of these four code points, excluding the one or more code points mentioned above, can indicate that none of the PRACH resource indication information is a valid value.

[0571] For example, as shown in Table 7, these two bits have code point 1, code point 2, code point 3, and code point 4. Code point 1, code point 2, or code point 3 indicates that the PRACH resource indication information is a valid value, while code point 4 indicates that the PRACH resource indication information is not a valid value. Additionally, 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.

[0572] Table 7

[0573]

[0574] In some possible examples, for two bits indicating that the PRACH resource indication information is or is not a valid value, one or more of the four code points of the two bits indicate that the PRACH resource indication information is a valid value, and one 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 duration of the second type of PRACH resource or the second duration of the PRACH resource.

[0575] It should be noted that since these two bits have four code points, this embodiment can consider that one or more of these four code points can indicate that the PRACH resource indication information is a valid value, and these one or more code points can also indicate the duration of the PRACH resource. In this way, the validity of the PRACH resource indication information can be indicated along with the duration of the PRACH resource, thereby saving signaling overhead. Additionally, one of the four code points other than these one or more code points can indicate that none of the PRACH resource indication information is a valid value.

[0576] For example, as shown in Table 8, these two bits have code point 1, code point 2, code point 3, and code point 4. Code point 1, code point 2, or code point 3 indicates that the PRACH resource indication information is a valid value, while code point 4 indicates that the PRACH resource indication information is not a valid value. Additionally, code point 1, code point 2, or code point 3 also indicates the duration of the second type of PRACH resource or the second duration of the PRACH resource.

[0577] Table 8

[0578]

[0579] In some possible examples, for the remaining one bit to indicate whether the SSB burst indication information is valid or invalid, since the remaining one bit has two code points, this embodiment can consider one code point to indicate that the SSB burst indication information is valid and the other code point to indicate that the SSB burst indication information is invalid.

[0580]

Scenario e

[0581] In "Scenario e", this embodiment considers that the PRACH resource indication information and SSB burst indication information occupy different bits in the paging, PEI, or 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, PEI, or RAR, two of these three bits indicate whether the SSB burst indication information is valid or invalid, and the remaining bit indicates whether the PRACH resource indication information is valid or invalid. In this case, the indication information includes three bits.

[0582] Of these three bits, two indicate whether the SSB burst indication information is valid or invalid, and the remaining bit indicates whether the PRACH resource indication information is valid or invalid.

[0583] In this way, these three bits can respectively indicate whether the PRACH resource indication information and the SSB burst indication information are valid values.

[0584] In some possible examples, for two bits indicating that the SSB burst indication information is valid or invalid, one or more of the four code points of the two bits indicate that the SSB burst indication information is valid, and one 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 invalid; the one or more code points also indicate the period of the second type of SSB burst or the second period of the SSB burst.

[0585] It should be noted that since these two bits have four code points, this embodiment can consider one or more of these four code points to indicate that the SSB burst indication information is a valid value, and these one or more code points can also indicate the period of the SSB burst. In this way, the valid value of the SSB burst indication information can be indicated along with the period of the SSB burst, thereby saving signaling overhead. Additionally, one of these four code points, excluding the one or more code points mentioned above, can indicate that none of the SSB burst indication information is a valid value.

[0586] For example, as shown in Table 9, these two bits have code point 1, code point 2, code point 3, and code point 4. Code point 1, code point 2, or code point 3 indicates that the SSB burst indication information is a valid value, while code point 4 indicates that the SSB burst indication information is not a valid value. Additionally, code point 1, code point 2, or code point 3 also indicates the period of the second type of SSB burst or the second period of the SSB burst.

[0587] Table 9

[0588]

[0589] In some possible examples, for two bits indicating that the SSB burst indication information is valid or invalid, one or more of the four code points of the two bits indicate that the SSB burst indication information is valid, and one 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 invalid; the one or more code points also indicate the duration of the second type of SSB burst or the second duration of the SSB burst.

[0590] It should be noted that since these two bits have four code points, this embodiment can consider that one or more of these four code points can indicate that the SSB burst indication information is a valid value, and these one or more code points can also indicate the duration of the SSB burst. In this way, the validity of the SSB burst indication information can be indicated along with the duration of the SSB burst, thereby saving signaling overhead. Additionally, one of the four code points other than these one or more code points can indicate that none of the SSB burst indication information is a valid value.

[0591] For example, as shown in Table 10, these two bits have code point 1, code point 2, code point 3, and code point 4. Code point 1, code point 2, or code point 3 indicates that the SSB burst indication information is a valid value, while code point 4 indicates that the SSB burst indication information is not a valid value. Additionally, 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.

[0592] Table 10

[0593]

[0594] In some possible examples, for the remaining bit indicating whether the PRACH resource indication information is valid or invalid, since the remaining bit has two code points, this embodiment can consider one code point indicating that the PRACH resource indication information is valid and the other code point indicating that the PRACH resource indication information is invalid.

[0595]

Scenario f

[0596] In "Scenario f", this embodiment considers that the PRACH resource indication information and 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, these three bits indicate whether the PRACH resource indication information is valid or invalid, and whether the SSB burst indication information is valid or invalid. In this case, the indication information includes three bits.

[0597] These three bits indicate whether the PRACH resource indication information is valid or invalid, and whether the SSB burst indication information is valid or invalid.

[0598] In this way, these three bits can indicate whether the PRACH resource indication information and SSB burst indication information are valid values.

[0599] In some possible examples, one or more of the eight code points of the three bits indicate that both the PRACH resource indication information and the SSB burst indication information are valid values, while one of the eight code points of the three bits, excluding the one or more code points, indicates that neither the PRACH resource indication information nor the SSB burst indication information is a valid value.

[0600] 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 the period of a second type of PRACH resource and the period of a second type of SSB burst; the second period combination is the second period of a PRACH resource and the second period of an SSB burst; the third period combination is the period of a second type of PRACH resource and the second period of an SSB burst; and the fourth period combination is the second period of a PRACH resource and the period of a second type of SSB burst.

[0601] It should be noted that since these three bits have eight code points, this embodiment can consider that one or more of these eight code points can indicate that both the PRACH resource indication information and the SSB burst indication information are valid values. These 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 along with the period of the second type of SSB burst or the period of the SSB burst, thereby helping to save signaling overhead.

[0602] In addition, one of the eight code points, excluding the aforementioned code point or one code point, can indicate that both the PRACH resource indication information and the SSB burst indication information are invalid values.

[0603] For example, as shown in Table 11, these two bits have code points 1, 2, 3, 4, 5, 6, 7, and 8. Code points 1 through 7 indicate that both the PRACH resource indication information and the SSB burst indication information are valid values, while code point 8 indicates that both the PRACH resource indication information and the SSB burst indication information are invalid values. Furthermore, code points 1 through 7 also indicate one of the following: a first cycle combination, a second cycle combination, a third cycle combination, or a fourth cycle combination.

[0604] Table 11

[0605]

[0606] Optionally, all options for cycle combinations can be configured by higher-level parameters. This allows all options for cycle combinations to be configured by semi-static signaling, such as SIB or RRC signaling.

[0607] In some possible examples, one or more of the eight code points of the three bits indicate that both the PRACH resource indication information and the SSB burst indication information are valid values, while one of the eight code points of the three bits, excluding the one or more code points, indicates that neither the PRACH resource indication information nor the SSB burst indication information is a valid value.

[0608] 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 duration combination is the duration of a second type of PRACH resource and the duration of a second type of SSB burst; the second duration combination is the second duration of a PRACH resource and the second duration of an SSB burst; the third duration combination is the duration of a second type of PRACH resource and the second duration of an SSB burst; and the fourth duration combination is the second duration of a PRACH resource and the duration of a second type of SSB burst.

[0609] It should be noted that since these three bits have eight code points, this embodiment can consider that one or more of these eight code points can indicate that both the PRACH resource indication information and the SSB burst indication information are valid values. These one or more code points can also 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 by changing the duration of the second type of SSB burst or the duration of the SSB burst, thereby saving signaling overhead. The second duration of the PRACH resource is shorter than the first duration of the PRACH resource.

[0610] In addition, one of the eight code points, excluding the aforementioned code point or one code point, can indicate that both the PRACH resource indication information and the SSB burst indication information are invalid values.

[0611] For example, as shown in Table 12, these two bits have code points 1, 2, 3, 4, 5, 6, 7, and 8. Code points 1 through 7 indicate that both the PRACH resource indication information and the SSB burst indication information are valid values, while code point 8 indicates that both the PRACH resource indication information and the SSB burst indication information are invalid values. Furthermore, code points 1 through 7 also indicate one of the following duration combinations: a first duration combination, a second duration combination, a third duration combination, or a fourth duration combination.

[0612] Table 12

[0613]

[0614]

[0615] Optionally, all options for duration combinations are configured by higher-level parameters. This allows all options for duration combinations to be configured by semi-static signaling, such as SIB or RRC signaling.

[0616]

Situation g

[0617] In scenario g, this embodiment considers that the PRACH resource indication information and 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 of the four bits indicate that the PRACH resource indication information is valid or invalid, and the remaining two bits indicate that the SSB burst indication information is valid or invalid. In this case, the indication information includes four bits.

[0618] Of these four bits, two bits indicate whether the PRACH resource indication information is valid or invalid, and the remaining two bits indicate whether the SSB burst indication information is valid or invalid.

[0619] In this way, these four bits can respectively indicate whether the PRACH resource indication information and the SSB burst indication information are valid values.

[0620] In some possible examples, for two bits indicating that the PRACH resource indication information is or is not a valid value, one or more of the four code points of the two bits indicate that the PRACH resource indication information is a valid value, and one 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.

[0621] It should be noted that since these two bits have four code points, this embodiment can consider that one or more of these four code points can indicate that the PRACH resource indication information is a valid value, and these 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 along with the PRACH resource period, thereby helping to save signaling overhead. Additionally, one of these four code points, excluding the one or more code points mentioned above, can indicate that none of the PRACH resource indication information is a valid value.

[0622] In some possible examples, for two bits indicating that the PRACH resource indication information is or is not a valid value, one or more of the four code points of the two bits indicate that the PRACH resource indication information is a valid value, and one 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 duration of the second type of PRACH resource or the second duration of the PRACH resource.

[0623] It should be noted that since these two bits have four code points, this embodiment can consider that one or more of these four code points can indicate that the PRACH resource indication information is a valid value, and these one or more code points can also indicate the duration of the PRACH resource. In this way, the validity of the PRACH resource indication information can be indicated along with the duration of the PRACH resource, thereby saving signaling overhead. Additionally, one of the four code points other than these one or more code points can indicate that none of the PRACH resource indication information is a valid value.

[0624] In some possible examples, for the remaining two bits indicating whether the SSB burst indication information is valid or not, one or more of the four code points of the remaining two bits indicate that the SSB burst indication information is valid, and one of the four code points of the remaining two bits, other than the one or more code points, indicates that the SSB burst indication information is not valid; the one or more code points also indicate the period of the second type of SSB burst or the second period of the SSB burst.

[0625] It should be noted that since the remaining two bits have four code points, this embodiment can consider that one or more of these four code points can indicate that the SSB burst indication information is a valid value, and these one or more code points can also indicate the period of the SSB burst. In this way, the valid value of the SSB burst indication information can be indicated along with the period of the SSB burst, thereby saving signaling overhead. Additionally, one of the four code points other than these one or more code points can indicate that none of the SSB burst indication information is a valid value.

[0626] In some possible examples, for the remaining two bits indicating whether the SSB burst indication information is valid or not, one or more of the four code points of the remaining two bits indicate that the SSB burst indication information is valid, and one of the four code points of the remaining two bits, other than the one or more code points, indicates that the SSB burst indication information is not valid; the one or more code points also indicate the duration of the second type of SSB burst or the second duration of the SSB burst.

[0627] It should be noted that since the remaining two bits have four code points, this embodiment can consider that one or more of these four code points can indicate that the SSB burst indication information is a valid value, and these one or more code points can also indicate the duration of the SSB burst. In this way, the validity of the SSB burst indication information can be indicated along with the duration of the SSB burst, thereby saving signaling overhead. Additionally, one of the four code points other than these one or more code points can indicate that none of the SSB burst indication information is a valid value.

[0628]

Example 6

[0629] In “Example 6”, this embodiment may consider determining to terminate the use of 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.

[0630] For terminal devices, such as Figure 20 As shown, Figure 20 This is a flowchart illustrating another communication method according to an embodiment of this application, specifically including the following steps:

[0631] S2010. After receiving Msg4, the terminal device may determine to terminate the use of Type 2 PRACH resources or Type 2 SSB bursts, or determine 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.

[0632] Thus, after receiving Msg4, the terminal device can use the RRC configuration in Msg4 to set the nature of the second type of PRACH resource or the periodic update of the PRACH resource, and / or after receiving Msg4, the terminal device can use the RRC configuration in Msg4 to set the nature of the second type of SSB burst or the periodic update of the SSB burst, thereby terminating or abandoning the second type of PRACH resource or the second type of SSB burst triggered by UL WUS, indicated by PEI, indicated by paging, or indicated by RAR, or determining 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.

[0633] For network devices, such as Figure 21 As shown, Figure 21 This is a flowchart illustrating another communication method according to an embodiment of this application, specifically including the following steps:

[0634] S2110. After the network device sends Msg4, the network device may determine to terminate the use of Type 2 PRACH resources or Type 2 SSB bursts, or determine to change the period of the PRACH resources from the second period to the first period or the period of the SSB burst from the second period to the first period.

[0635] In this way, after the network device sends Msg4, it can use the RRC configuration in Msg4 to set the nature of the Type 2 PRACH resource or the periodic update of the PRACH resource, and / or after the network device sends Msg4, it can use the RRC configuration in Msg4 to set the nature of the Type 2 SSB burst or the periodic update of the SSB burst, thereby terminating or abandoning the Type 2 PRACH resource or Type 2 SSB burst triggered by UL WUS, indicated by PEI, indicated by paging, or indicated by RAR, or determining 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.

[0636] The communication device of this embodiment will be described below as an example.

[0637] The above primarily describes the solutions of the embodiments of this application from a methodological perspective. It is understood that, in order to achieve the above functions, network devices / terminal devices include corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should readily recognize that, based on the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software-driven hardware manner 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 this application.

[0638] This application embodiment can divide network devices / terminal devices into functional units based on the above method examples. For example, each function can be divided into separate functional units, or two or more functions can be integrated into one processing unit. The integrated unit can be implemented in hardware or as a software program module. It should be noted that the unit division in this application embodiment is illustrative and only represents a logical functional division; in actual implementation, there may be other division methods.

[0639] When using integrated units, Figure 22 This is a functional unit block diagram of a communication device according to an embodiment of this application. The communication device 2200 includes: a determining unit 2201.

[0640] Optionally, the determining unit 2201 can be a module unit for processing signals, data, information, sequences, etc., without specific limitations.

[0641] Optionally, the determination unit 2201 can be integrated into the processing unit.

[0642] It should be noted that the processing unit can be a processor or controller, such as a baseband processor, baseband chip, central processing unit (CPU), general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processing unit can also be a combination that implements computational functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

[0643] Optionally, the communication device 2200 may further include a storage unit for storing computer program code or instructions executed by the communication device 2200. The storage unit may be a memory.

[0644] Optionally, the communication device 2200 may be a chip or a chip module.

[0645] Optionally, the communication device 2200 may also include a communication unit. It should be noted that the communication unit may be a communication interface, transceiver, transceiver circuit, etc.

[0646] Optionally, the determining unit 2201 is used to perform any of the steps performed by the chip / chip module / terminal device / network device, etc., as described in the above method embodiments. A detailed description follows.

[0647] In specific implementation, the determining unit 2201 is used to execute the steps as described in the above method embodiments, and when performing actions such as sending, it can selectively call other units to complete the corresponding operations. Since this application involves multiple methods, each method will be described in detail below.

[0648] In “Example 1”, the determining unit 2201 is used for:

[0649] 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 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.

[0650] As can be seen, since the communication device 2200 determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot, or symbol, or after the (m+d)th millisecond, time slot, or symbol, the communication device 2200 determines that the period of the PRACH resource changes from the first period to the second period, the communication device 2200 can send the second type of PRACH or send PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from sending fewer PRACH to sending more PRACH, thereby realizing adaptive PRACH transmission.

[0651] In some possible examples, the uplink wake-up signal is one or more specific preambles within a first-type PRACH resource, the period of which is greater than the period of a second-type PRACH resource; or,

[0652] The uplink wake-up signal is one or more specific preambles within a PRACH resource with a first cycle.

[0653] In "Scenario 1" of "Example 2", the determining unit 2201 is used for:

[0654] If the terminal device receives a PEI in the m-th millisecond, time slot, or symbol, and the PRACH resource indication information in the PEI is a valid value, 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.

[0655] As can be seen, since the communication device 2200 determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot, or symbol, or after the (m+d)th millisecond, time slot, or symbol, the communication device 2200 determines that the period of the PRACH resource changes from the first period to the second period, the communication device 2200 can send the second type of PRACH or send PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from sending fewer PRACH to sending more PRACH, thereby realizing adaptive PRACH transmission.

[0656] In "Scenario Two" of "Example 2", the determining unit 2201 is used for:

[0657] If the terminal device receives a PEI in the m-th millisecond, time slot, or symbol, 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 (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.

[0658] As can be seen, since the communication device 2200 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 communication device 2200 can receive the second type of SSB or receive SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from receiving fewer SSBs to receiving more SSBs, thereby achieving adaptive SSB reception. In addition, since the (m+d)th millisecond, time slot, or symbol is highly likely to occur before the paging frame (PF) or paging occasion (PO) associated with the PEI, the communication device 2200 can receive the second type of SSB burst or the second period of SSB burst before the PF / PO. Therefore, the communication device 2200 can achieve downlink time-frequency synchronization and start receiving paging as soon as possible through the second type of SSB burst or the second period of SSB burst.

[0659] In "Scenario 3" of "Example 2", the determining unit 2201 is used for:

[0660] 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 determines that the period of the SSB burst is changed from the first period to the second period after the first start frame.

[0661] As can be seen, since the communication device 2200 determines that the period of the SSB burst changes from the first period to the second period after the first start frame, the communication device 2200 can receive the second type of SSB or receive SSBs according to the second period after the first start frame, so as to change from receiving fewer SSBs to receiving more SSBs, thereby achieving adaptive SSB reception. In addition, since the first start frame is the start frame of the paging period in which the PF associated with the PEI is located, the communication device 2200 can quickly achieve downlink time-frequency synchronization and start receiving paging as soon as possible through the second type of SSB burst or the second period of SSB burst.

[0662] In "Scenario 1" of "Example 3", the determining unit 2201 is used for:

[0663] If the terminal device receives a paging message in the m-th millisecond, time slot, or symbol, and the PRACH resource indication information in the paging message is valid, 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 be 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.

[0664] As can be seen, since the communication device 2200 determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot, or symbol, or after the (m+d)th millisecond, time slot, or symbol, the communication device 2200 determines that the period of the PRACH resource changes from the first period to the second period, the terminal device can send the second type of PRACH or send PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from sending fewer PRACH to sending more PRACH, thereby realizing adaptive PRACH transmission.

[0665] In some possible examples, the PRACH resource indication information occupies reserved bits within the paging, or the PRACH resource indication information occupies the remaining bits in the short message within the paging.

[0666] In "Scenario 2" of "Example 3", the determining unit 2201 is used for:

[0667] If the terminal device receives a paging message in the m-th millisecond, time slot, or symbol, and the SSB burst indication information in the paging message is valid, then the second type of SSB burst is determined to be valid after the (m+d)-th millisecond, time slot, or symbol. Alternatively, 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. Here, m is a positive integer, and d is an integer greater than or equal to 0.

[0668] As can be seen, since the communication device 2200 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 communication device 2200 can receive the second type of SSB or receive SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from receiving fewer SSBs to receiving more SSBs, thereby achieving adaptive SSB reception. In addition, since the (m+d)th millisecond, time slot, or symbol is highly likely to be before the time domain position of the PRACH resource, the communication device 2200 can receive the second type of SSB burst or the second period of SSB burst before the time domain position of the PRACH resource. Therefore, the communication device 2200 can achieve downlink time-frequency synchronization as quickly as possible and start transmitting PRACH as soon as possible through the second type of SSB burst or the second period of SSB burst.

[0669] In some possible examples, the SSB burst indication message occupies reserved bits within the paging, or the SSBburst indication message occupies the remaining bits in the short message within the paging.

[0670] In "Scenario 3" of "Example 3", the determining unit 2201 is used for:

[0671] If the terminal device receives a paging message and the SSB burst indication information in the paging message is valid, then it determines that the second type of SSB burst is valid after the second start frame, or determines that the period of the SSB burst is changed from the first period to the second period after the second start frame.

[0672] As can be seen, since the communication device 2200 determines that the period of the SSB burst changes from the first period to the second period after the second start frame, the communication device 2200 can receive the second type of SSB or receive SSBs according to the second period after the second start frame, so as to change from receiving fewer SSBs to receiving more SSBs, thereby achieving adaptive SSB reception. In addition, since the second start frame is the start frame within the paging period of the paging associated PF, the communication device 2200 can achieve downlink time-frequency synchronization as quickly as possible through the second type of SSB burst or the second period of SSB burst.

[0673] In “Example 4”, the determining unit 2201 is used for:

[0674] If the terminal device receives a RAR in the m-th millisecond, time slot, or symbol, and the SSB burst indication information in the RAR is valid, 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.

[0675] As can be seen, since the communication device 2200 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 communication device 2200 can receive the second type of SSB or receive SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from receiving fewer SSBs to receiving more SSBs, thereby achieving adaptive SSB reception. In addition, since the (m+d)th millisecond, time slot, or symbol is before Msg4 or Msg3, the communication device 2200 can receive the second type of SSB burst or the second period of SSB burst before Msg4 or Msg3. Therefore, the communication device 2200 can achieve downlink time-frequency synchronization as soon as possible and start receiving Msg4 or starting to transmit Msg3 as soon as possible through the second type of SSB burst or the second period of SSB burst.

[0676] In "Scenario a" of "Example 5", the determining unit 2201 is used for:

[0677] Receive indication information, which indicates whether the PRACH resource indication information is valid or invalid, and whether the SSB burst indication information is valid or invalid.

[0678] In some possible examples, a code point in the indication information indicates that both the PRACH resource indication information and the SSB burst indication information are valid values;

[0679] The other 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.

[0680] In some possible examples, the first of 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;

[0681] The second code point out of the four code points of the indication information indicates that the PRACH resource indication information is a valid value and the SSBburst indication information is not a valid value;

[0682] The third code point out of the four code points of the indication information indicates that the PRACH resource indication information is not a valid value and the SSBburst indication information is a valid value.

[0683] 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.

[0684] In some possible examples, 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; or one of the four code points of the indication information, excluding one or more code points, indicates that neither the PRACH resource indication information nor the SSB burst indication information is a valid value.

[0685] 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 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.

[0686] The first cycle combination consists of the cycle of the second type of PRACH resource and the cycle of the second type of SSB burst.

[0687] The second cycle combination consists of the second cycle of PRACH resources and the second cycle of SSB bursts.

[0688] The third cycle combination is the cycle of the second type of PRACH resource and the second cycle of the SSB burst;

[0689] The fourth cycle combination is the cycle of the second cycle and the second type of SSB burst of the PRACH resource;

[0690] The first duration combination is the duration of the second type of PRACH resource and the duration of the second type of SSB burst;

[0691] The second duration combination is the second duration of the PRACH resource and the second duration of the SSB burst;

[0692] The third duration combination is the duration of the second type of PRACH resource and the second duration of the SSB burst;

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

[0694] In some possible examples, 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 of the four code points of the indication information, excluding one or more code points, indicates that the PRACH resource indication information is not a valid value.

[0695] One or more code points may also indicate the period of a type 2 PRACH resource or a second period of a PRACH resource, or one or more code points may also indicate the duration of a type 2 PRACH resource or a second duration of a PRACH resource.

[0696] In some possible examples, 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 of the four code points of the indication information, excluding one or more code points, indicates that the SSBburst indication information is not a valid value.

[0697] One or more code points may also indicate the period of a Type 2 SSB burst or the second period of an SSB burst, or one or more code points may also indicate the duration of a Type 2 SSB burst or the second duration of an SSB burst.

[0698] In some possible examples, one or more of the eight code points of the indication information indicate that both the PRACH resource indication information and the SSB burst indication information are valid values; or one of the eight code points of the indication information, excluding one or more code points, indicates that neither the PRACH resource indication information nor the SSB burst indication information is a valid value.

[0699] 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 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.

[0700] The first cycle combination consists of the cycle of the second type of PRACH resource and the cycle of the second type of SSB burst.

[0701] The second cycle combination consists of the second cycle of PRACH resources and the second cycle of SSB bursts.

[0702] The third cycle combination is the cycle of the second type of PRACH resource and the second cycle of the SSB burst;

[0703] The fourth cycle combination is the cycle of the second cycle and the second type of SSB burst of the PRACH resource;

[0704] The first duration combination is the duration of the second type of PRACH resource and the duration of the second type of SSB burst;

[0705] The second duration combination is the second duration of the PRACH resource and the second duration of the SSB burst;

[0706] The third duration combination is the duration of the second type of PRACH resource and the second duration of the SSB burst;

[0707] The fourth duration combination is the second duration of the PRACH resource and the duration of the second type of SSB burst.

[0708] In some possible examples, 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 of the four code points of the indication information, excluding one or more code points, indicates that the PRACH resource indication information is not a valid value.

[0709] One or more code points may also indicate the period of a type 2 PRACH resource or a second period of a PRACH resource, or one or more code points may also indicate the duration of a type 2 PRACH resource or a second duration of a PRACH resource.

[0710] In some possible examples, one or more of the remaining four code points of the indication information indicate that the SSBburst indication information is a valid value, and one of the remaining four code points of the indication information, excluding one or more code points, indicates that the SSB burst indication information is not a valid value.

[0711] One or more code points may also indicate the period of a Type 2 SSB burst or the second period of an SSB burst, or one or more code points may also indicate the duration of a Type 2 SSB burst or the second duration of an SSB burst.

[0712] In “Example 6”, the determining unit 2201 is used for:

[0713] After receiving Msg4, the terminal device 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.

[0714] Thus, after the terminal device receives Msg4, the communication device 2200 can use the RRC configuration in Msg4 to set the nature of the second type of PRACH resource or the periodic update of the PRACH resource, and / or after the terminal device receives Msg4, the communication device 2200 can use the RRC configuration in Msg4 to set the nature of the second type of SSB burst or the periodic update of the SSB burst, thereby terminating or abandoning the second type of PRACH resource or the second type of SSB burst triggered by UL WUS, indicated by PEI, indicated by paging, or indicated by RAR, or determining 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.

[0715] The following is an example description of another communication device in this embodiment.

[0716] The foregoing primarily describes the embodiments of this application from a methodological perspective. It is understood that, in order to achieve the aforementioned functions, the network device includes corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should readily recognize that, based on the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a particular function is executed through 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 this application.

[0717] This application embodiment can divide the network device into functional units according to the above method example. For example, each function can be divided into different functional units, or two or more functions can be integrated into one processing unit. The integrated unit can be implemented in hardware or as a software program module. It should be noted that the unit division in this application embodiment is illustrative and only represents a logical functional division, while other division methods may be used in actual implementation.

[0718] When using integrated units, Figure 23 This is a functional unit block diagram of another communication device according to an embodiment of this application. The communication device 2300 includes: a determination unit 2301.

[0719] Optionally, the determining unit 2301 can be a module unit for processing signals, data, information, sequences, etc., without specific limitations.

[0720] Optionally, the determining unit 2301 can be integrated into the processing unit.

[0721] It should be noted that the processing unit can be a processor or controller, such as a baseband processor, baseband chip, central processing unit (CPU), general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. The processing unit can also be a combination that implements computational functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

[0722] Optionally, the communication device 2300 may further include a storage unit for storing computer program code or instructions executed by the communication device 2300. The storage unit may be a memory.

[0723] Optionally, the communication device 2300 may be a chip or a chip module.

[0724] Optionally, the determining unit 2301 is used to perform any of the steps performed by the chip / chip module / terminal device, etc., as described in the above method embodiments. A detailed description follows.

[0725] In “Example 1”, the determining unit 2301 is used for:

[0726] If a 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.

[0727] As can be seen, since the communication device 2300 determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot, or symbol, or after the (m+d)th millisecond, time slot, or symbol, the communication device 2300 determines that the period of the PRACH resource changes from the first period to the second period, the network device can receive the second type of PRACH or receive PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from receiving fewer PRACH to receiving more PRACH, thereby realizing adaptive PRACH reception.

[0728] In “Scenario 1” of “Example 2”, the determining unit 2301 is used for:

[0729] If the network device finishes sending the PEI in the m-th 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 be 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.

[0730] As can be seen, since the communication device 2300 determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot, or symbol, or after the (m+d)th millisecond, time slot, or symbol, the communication device 2300 determines that the period of the PRACH resource changes from the first period to the second period, the communication device 2300 can receive the second type of PRACH or receive PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from receiving fewer PRACH to receiving more PRACH, thereby realizing adaptive PRACH reception.

[0731] In "Scenario Two" of "Example 2", the determining unit 2301 is used for:

[0732] If the network device finishes transmitting the PEI in the m-th millisecond, time slot, or symbol, and the SSB burst indication information in the PEI is valid, then the second type of SSB burst is determined to be valid after the (m+d)-th millisecond, time slot, or symbol. Alternatively, 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. Here, m is a positive integer, and d is an integer greater than or equal to 0.

[0733] As can be seen, since the communication device 2300 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 communication device 2300 can send the second type of SSB or send an SSB according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from sending fewer SSBs to sending more SSBs, thereby achieving adaptive SSB transmission. In addition, since the (m+d)th millisecond, time slot, or symbol is highly likely to occur before the PF or PO associated with the PEI, the communication device 2300 can send the second type of SSB burst or the second period of SSB burst before the PF / PO, so that the communication device 2300 can quickly synchronize downlink time and frequency with the terminal equipment and start sending paging messages as soon as possible.

[0734] In "Scenario 3" of "Example 2", the determining unit 2301 is used for:

[0735] If the network device has finished sending the PEI and the SSB burst indication information in the PEI is valid, then 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.

[0736] As can be seen, since the communication device 2300 determines that the period of the SSB burst changes from the first period to the second period after the first start frame, the communication device 2300 can send the second type of SSB or receive SSBs according to the second period after the first start frame, so as to change from sending fewer SSBs to sending more SSBs, thereby realizing adaptive SSB transmission. In addition, since the first start frame is the start frame of the paging period of the PF associated with the PEI, the communication device 2300 can quickly synchronize downlink time and frequency with the terminal equipment and start paging as soon as possible through the second type of SSB burst or the second period of SSB burst.

[0737] In "Scenario 1" of "Example 3", the determining unit 2301 is used for:

[0738] If the network device completes the paging process on the m-th millisecond, time slot, or symbol, and the PRACH resource indication information within the paging is valid, 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, where m is a positive integer and d is an integer greater than or equal to 0.

[0739] As can be seen, since the communication device 2300 determines that the second type of PRACH resource is valid after the (m+d)th millisecond, time slot, or symbol, or after the (m+d)th millisecond, time slot, or symbol, the communication device 2300 determines that the period of the PRACH resource changes from the first period to the second period, the communication device 2300 can receive the second type of PRACH or receive PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from receiving fewer PRACH to receiving more PRACH, thereby realizing adaptive PRACH reception.

[0740] In "Scenario 2" of "Example 3", the determining unit 2301 is used for:

[0741] If the network device completes the paging process in the m-th millisecond, time slot, or symbol, and the SSB burst indication information within the paging is valid, then the second type of SSB burst is determined to be valid after the (m+d)-th millisecond, time slot, or symbol. Alternatively, 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. Here, m is a positive integer, and d is an integer greater than or equal to 0.

[0742] As can be seen, since the communication device 2300 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 communication device 2300 can send the second type of SSB or send SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from sending fewer SSBs to sending more SSBs, thereby achieving adaptive SSB transmission. In addition, since the (m+d)th millisecond, time slot, or symbol is highly likely to be before the time domain position of the PRACH resource, the communication device 2300 can send the second type of SSB burst or the second period of SSB burst before the time domain position of the PRACH resource. Therefore, the communication device 2300 can quickly achieve downlink time-frequency synchronization with the terminal device and start receiving PRACH as soon as possible through the second type of SSB burst or the second period of SSB burst.

[0743] In "Scenario 3" of "Example 3", the determining unit 2301 is used for:

[0744] If the network device has finished sending the paging and the SSB burst indication information in the paging is valid, then the second type of SSB burst is determined to be valid after the second start frame, or the period of the SSB burst is determined to be changed from the first period to the second period after the second start frame.

[0745] As can be seen, since the communication device 2300 determines that the period of the SSB burst changes from the first period to the second period after the first start frame, the communication device 2300 can send the second type of SSB or receive SSBs according to the second period after the first start frame, so as to change from sending fewer SSBs to sending more SSBs, thereby realizing adaptive SSB transmission. In addition, since the second start frame is the start frame of the paging period in which the paging PF is located, the communication device 2300 can quickly achieve downlink time-frequency synchronization with the terminal equipment through the second type of SSB burst or the second period of SSB burst.

[0746] In “Example 4”, the determining unit 2301 is used for:

[0747] If the network device completes the transmission of the RAR in the m-th millisecond, time slot, or symbol, and the SSB burst indication information in the RAR is valid, then the second type of SSB burst is determined to be valid after the (m+d)-th millisecond, time slot, or symbol. Alternatively, 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. Here, m is a positive integer, and d is an integer greater than or equal to 0.

[0748] As can be seen, since the communication device 2300 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 communication device 2300 can send the second type of SSB or send SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from sending fewer SSBs to sending more SSBs, thereby achieving adaptive SSB transmission. In addition, since the (m+d)th millisecond, time slot, or symbol is before Msg4 or Msg3, the communication device 2300 can send the second type of SSB burst or the second period of SSB burst before Msg4 or Msg3. Therefore, the communication device 2300 can quickly achieve downlink time-frequency synchronization with the terminal device and quickly start sending Msg4 or quickly start receiving Msg3 through the second type of SSB burst or the second period of SSB burst.

[0749] In "Scenario a" of "Example 5", the determining unit 2301 is used for:

[0750] Send indication information, indicating whether the PRACH resource indication information is valid or invalid, and whether the SSB burst indication information is valid or invalid.

[0751] In this way, the network indication or network configuration is used to indicate whether the PRACH resource indication information and SSBburst indication information are valid values.

[0752] In “Example 6”, the determining unit 2301 is used for:

[0753] After the network device finishes sending 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.

[0754] Thus, after the network device finishes sending Msg4, the communication device 2300 can use the RRC configuration in Msg4 to set the nature of the second type PRACH resource or the periodic update of the PRACH resource, and / or after the network device finishes sending Msg4, the communication device 2300 can use the RRC configuration in Msg4 to set the nature of the second type SSB burst or the periodic update of the SSB burst, thereby terminating or abandoning the second type PRACH resource or the second type SSB burst triggered by UL WUS, indicated by PEI, indicated by paging, or indicated by RAR, or determining 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.

[0755] The following is an example description of a terminal device in this embodiment.

[0756] Please see Figure 24 , Figure 24 This is a schematic diagram of the structure of a terminal device according to an embodiment of this application. The terminal device 2400 may include a processor 2410, a memory 2420, and a communication bus for connecting the processor 2410 and the memory 2420.

[0757] Optionally, the memory 2420 may include, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or compact disc read-only memory (CD-ROM), which is used to store program code executed by the terminal device 2400 and data transmitted.

[0758] Optionally, the terminal device 2400 also includes a communication interface for receiving and sending data.

[0759] Optionally, the processor 2410 may be one or more central processing units (CPUs). If the processor 2410 is a central processing unit (CPU), the central processing unit (CPU) may be a single-core central processing unit (CPU) or a multi-core central processing unit (CPU).

[0760] Optionally, the processor 2410 can be a baseband chip, a chip, a central processing unit (CPU), a general-purpose processor, a DSP, an ASIC, an FPGA, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof.

[0761] In specific implementation, the processor 2410 in the terminal device 2400 executes the computer program or instructions 2421 stored in the memory 2420, and performs the corresponding steps of the method embodiment shown above. Since this application involves multiple methods, each method will be described in detail below.

[0762] In “Example 1”, the processor 2410 in the terminal device 2400 is used to execute the computer program or instructions 2421 stored in the memory 2420, and perform the following steps:

[0763] If the uplink wake-up signal is sent on the m-th 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 be 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.

[0764] As can be seen, 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 after the (m+d)th millisecond, time slot, or symbol, the terminal device determines that the period of the PRACH resource has changed from the first period to the second period, the terminal device can send the second type of PRACH or send PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from sending fewer PRACH to sending more PRACH, thereby realizing adaptive PRACH transmission.

[0765] In "Scenario 1" of "Example 2", the processor 2410 in the terminal device 2400 executes the computer program or instructions 2421 stored in the memory 2420, performing the following steps:

[0766] If a PEI is received on the m-th millisecond, time slot, or symbol, and the PRACH resource indication information within the PEI is valid, 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 be 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.

[0767] As can be seen, 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 after the (m+d)th millisecond, time slot, or symbol, the terminal device determines that the period of the PRACH resource has changed from the first period to the second period, the terminal device can send the second type of PRACH or send PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from sending fewer PRACH to sending more PRACH, thereby realizing adaptive PRACH transmission.

[0768] In "Scenario Two" of "Example 2", the processor 2410 in the terminal device 2400 executes the computer program or instructions 2421 stored in the memory 2420, performing the following steps:

[0769] 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 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, where m is a positive integer and d is an integer greater than or equal to 0.

[0770] As can be seen, 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 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 SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from receiving fewer SSBs to receiving more SSBs, thereby achieving adaptive SSB reception. In addition, since the (m+d)th millisecond, time slot, or symbol is highly likely to occur 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 second period of SSB burst before the PF / PO. Thus, the terminal device can achieve downlink time-frequency synchronization as quickly as possible and start receiving paging bursts as soon as possible through the second type of SSB burst or the second period of SSB burst.

[0771] In "Scenario 3" of "Example 2", the processor 2410 in the terminal device 2400 executes the computer program or instructions 2421 stored in the memory 2420, performing the following steps:

[0772] If a PEI is received and the SSB burst indication information within the PEI is valid, then 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.

[0773] As can be seen, since the terminal device determines that the SSB burst period changes from the first period to the second period after the first start frame, it can receive the second type of SSB or receive SSBs according to the second period after the first start frame. This allows it to change from receiving fewer SSBs to receiving more SSBs, thus achieving adaptive SSB reception. Furthermore, since the first start frame is the start frame within the paging period of the PF associated with the PEI, the terminal device can quickly achieve downlink time-frequency synchronization and begin paging reception using the second type of SSB burst or the second period's SSB burst.

[0774] In "Scenario 1" of "Example 3", the processor 2410 in the terminal device 2400 executes the computer program or instructions 2421 stored in the memory 2420, performing the following steps:

[0775] If a paging is received on the m-th millisecond, time slot, or symbol, and the PRACH resource indication information within the paging is valid, 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 be 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.

[0776] As can be seen, 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 after the (m+d)th millisecond, time slot, or symbol, the terminal device determines that the period of the PRACH resource has changed from the first period to the second period, the terminal device can send the second type of PRACH or send PRACH according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from sending fewer PRACH to sending more PRACH, thereby realizing adaptive PRACH transmission.

[0777] In "Scenario 2" of "Example 3", the processor 2410 in the terminal device 2400 executes the computer program or instructions 2421 stored in the memory 2420, performing the following steps:

[0778] If a paging is received in the m-th millisecond, time slot, or symbol, and the SSB burst indication information in the paging is valid, 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 be 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.

[0779] As can be seen, 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 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 SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from receiving fewer SSBs to receiving more SSBs, thereby achieving adaptive SSB reception. Furthermore, since the (m+d)th millisecond, time slot, or symbol is highly 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 second period of the SSB burst before the time domain position of the PRACH resource. Therefore, the terminal device can achieve downlink time-frequency synchronization and start transmitting PRACH as quickly as possible through the second type of SSB burst or the second period of the SSB burst.

[0780] In "Scenario 3" of "Example 3", the processor 2410 in the terminal device 2400 is used to execute the computer program or instructions 2421 stored in the memory 2420, and performs the following steps:

[0781] If a paging is received and the SSB burst indication information within the paging is valid, then the second type of SSB burst is determined to be valid after the second start frame, or the period of the SSB burst is determined to be changed from the first period to the second period after the second start frame.

[0782] As can be seen, since the terminal device determines that the SSB burst period changes from the first period to the second period after the second start frame, it can receive the second type of SSB or receive SSBs according to the second period after the second start frame. This allows it to change from receiving fewer SSBs to receiving more SSBs, thus achieving adaptive SSB reception. Furthermore, since the second start frame is the start frame within the paging period of the paging-associated PF, the terminal device can achieve downlink time-frequency synchronization as quickly as possible through the second type of SSB burst or the second period's SSB burst.

[0783] In “Example 4”, the processor 2410 in the terminal device 2400 is used to execute the computer program or instructions 2421 stored in the memory 2420, and performs the following steps:

[0784] If a RAR is received in the m-th millisecond, time slot, or symbol, and the SSB burst indication information within the RAR is valid, 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, where m is a positive integer and d is an integer greater than or equal to 0.

[0785] As can be seen, 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 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 SSBs according to the second period after the (m+d)th millisecond, time slot, or symbol, so as to change from receiving fewer SSBs to receiving more SSBs, thereby achieving adaptive SSB reception. 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 second period of SSB burst before Msg4 or Msg3. Therefore, the terminal device can achieve downlink time-frequency synchronization as soon as possible and start receiving Msg4 or starting to transmit Msg3 as soon as possible through the second type of SSB burst or the second period of SSB burst.

[0786] In “Example 5”, the processor 2410 in the terminal device 2400 is used to execute the computer program or instructions 2421 stored in the memory 2420, and perform the following steps:

[0787] Receive indication information, which indicates whether the PRACH resource indication information is valid or invalid, and whether the SSB burst indication information is valid or invalid.

[0788] In this way, the network indication or network configuration PRACH resource indication information and SSB burst indication information are used to determine whether they are valid values.

[0789] In “Example 6”, the processor 2410 in the terminal device 2400 is used to execute the computer program or instructions 2421 stored in the memory 2420, and perform the following steps:

[0790] After receiving Msg4, the terminal device 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.

[0791] Thus, after receiving Msg4, the terminal device can use the RRC configuration in Msg4 to set the nature of the second type of PRACH resource or the periodic update of the PRACH resource, and / or after receiving Msg4, the terminal device can use the RRC configuration in Msg4 to set the nature of the second type of SSB burst or the periodic update of the SSB burst, thereby terminating or abandoning the second type of PRACH resource or the second type of SSB burst triggered by UL WUS, indicated by PEI, indicated by paging, or indicated by RAR, or determining 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.

[0792] The following is an example of a network device in this embodiment.

[0793] Please see Figure 25 , Figure 25 This is a schematic diagram of the structure of a network device according to an embodiment of this application. The network device 2500 may include a processor 2510, a memory 2520, and a communication bus for connecting the processor 2510 and the memory 2520.

[0794] Optionally, the memory 2520 may include, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or compact disc read-only memory (CD-ROM), which is used to store program code executed by the network device 2500 and data transmitted.

[0795] Optionally, the network device 2500 also includes a communication interface for receiving and sending data.

[0796] Optionally, the processor 2510 may be one or more central processing units (CPUs). If the processor 2510 is a central processing unit (CPU), the central processing unit (CPU) may be a single-core central processing unit (CPU) or a multi-core central processing unit (CPU).

[0797] Optionally, the processor 2510 can be a baseband chip, a chip, a central processing unit (CPU), a general-purpose processor, a DSP, an ASIC, an FPGA, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof.

[0798] In specific implementation, the processor 2510 in the network device 2500 executes the computer program or instructions 2521 stored in the memory 2520, performing the corresponding steps of the method embodiment shown above. Since this application involves multiple methods, each method will be described in detail below.

[0799] In “Example 1”, the processor 2510 in the network device 2500 is used to execute the computer program or instructions 2521 stored in the memory 252...

Claims

1. A communication method characterized by comprising: The method is applied to a terminal device, and the method comprises: If the terminal device has sent an uplink wake-up signal at an mth millisecond, time slot or symbol, the second type of PRACH resource is determined to be valid after an (m+d)th millisecond, time slot or symbol, or the period of the PRACH resource is determined to be changed from a first period to a 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.

2. A communication method characterized by comprising: The method is applied to a network device, and the method comprises: If the network device has received an uplink wake-up signal at an mth millisecond, time slot or symbol, the second type of PRACH resource is determined to be valid after an (m+d)th millisecond, time slot or symbol, or the period of the PRACH resource is determined to be changed from a first period to a 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.

3. The method according to claim 1 or 2, characterized in that, The uplink wake-up signal is one or more specific preambles in a 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. The uplink wake-up signal is one or more specific preambles in a PRACH resource with the first period.

4. A communication method characterized by comprising: The method is applied to a terminal device, and the method comprises: If the terminal device has received a paging early indication (PEI) at an mth millisecond, time slot or symbol, and the PRACH resource indication information in the PEI is a valid value, the second type of PRACH resource is determined to be valid after an (m+d)th millisecond, time slot or symbol, or the period of the PRACH resource is determined to be changed from a first period to a 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. If the terminal device has received a PEI at an mth millisecond, time slot or symbol, and the synchronization signal block burst (SSB burst) indication information in the PEI is a valid value, the second type of SSB burst is determined to be valid after an (m+d)th millisecond, time slot or symbol, or the period of the SSB burst is determined to be changed from a first period to a 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. If the terminal device has received a 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 a first start frame, or the period of the SSB burst is determined to be changed from a first period to a second period after the first start frame, the first start frame being a start frame in a paging cycle in which a paging frame (PF) associated with the PEI is located.

5. A communication method characterized by comprising: The method is applied to a network device, and the method comprises: determining that PRACH resource indication information in the PEI is a valid value, and transmitting the PEI; if the network device transmits the PEI on the mth millisecond, time slot or symbol, determining that a second type of PRACH resource is valid after a (m+d)th millisecond, time slot or symbol, or determining 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; or determining that SSB burst indication information in the PEI is a valid value, and transmitting the PEI; if the network device transmits the PEI on the mth millisecond, time slot or symbol, 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; or determining that SSB burst indication information in the PEI is a valid value, and transmitting the PEI; if the network device transmits the PEI, determining that a second type of SSB burst is valid after a first start frame, or determining that a period of the SSB burst is changed from a first period to a second period after the first start frame, the first start frame being a start frame in a paging cycle in which a PF associated with the PEI is located.

6. A communication method characterized by comprising: application to a terminal device; the method comprises: if the terminal device receives a paging on the mth millisecond, time slot or symbol, and PRACH resource indication information in the paging is a valid value, determining that a second type of PRACH resource is valid after a (m+d)th millisecond, time slot or symbol, or determining 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; or if the terminal device receives a paging on the mth millisecond, time slot or symbol, and synchronization signal block burst SSB burst indication information in the paging is a valid value, 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; or if the terminal device receives a paging, and SSB burst indication information in the paging is a valid value, determining that a second type of SSB burst is valid after a second start frame, or determining that a period of the SSB burst is changed from a first period to a second period after the second start frame, the second start frame being a start frame in a paging cycle in which a paging frame PF associated with the paging is located.

7. A communication method characterized by comprising: application to a network device; the method comprises: determining that PRACH resource indication information in the paging is a valid value, and sending the paging; if the network device finishes sending the paging at the mth millisecond, time slot or symbol, determining that a second type of PRACH resource is valid after a (m+d)th millisecond, time slot or symbol, or determining 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; or determining that SSB burst indication information in the paging is a valid value, and sending the paging; if the network device finishes sending the paging at the mth millisecond, time slot or symbol, 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; or determining that SSB burst indication information in the paging is a valid value, and sending the paging; if the network device finishes sending the paging and the SSB burst indication information in the paging is a valid value, determining that a second type of SSB burst is valid after a second start frame, or determining that a period of the SSB burst is changed from a first period to a second period after the second start frame, the second start frame being a start frame in a paging cycle in which a 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 a short message in the paging. Or 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.

9. A communication method characterized by comprising: The method is applied to a terminal device and includes: if the terminal device receives a random access response RAR at the mth millisecond, time slot or symbol and SSB burst indication information in the RAR is a valid value, 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.

10. A communication method characterized by comprising: The method is applied to a network device and includes: determining that SSB burst indication information in the RAR is a valid value, and sending the RAR; if the network device finishes sending the RAR at the mth millisecond, time slot or symbol, 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.

11. A communication method, comprising: The method is applied to a terminal device and includes: Receiving indication information, the indication information indicating that PRACH resource indication information is or is not a valid value and SSB burst indication information is or is not a valid value.

12. A communication method, characterized by, Applied to a network device; comprising: Sending indication information, the indication information indicating that PRACH resource indication information is or is not a valid value and 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 the PRACH resource indication information and the SSB burst indication information are both valid values; 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.

14. The method of claim 11 or 12, wherein, 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; 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; A third code point of 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; A fourth 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 not valid values.

15. The method of claim 11 or 12, wherein, One or more code points of the four code points of the indication information 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 indication information 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; The one or more code points 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 code points further indicate one of: a first duration combination, a second duration combination, a third duration combination, or a fourth duration combination; 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. The fourth period combination is a second period of the PRACH resource and a period of the second type of SSB burst. 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.

16. The method of claim 11 or 12, wherein, 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 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. The one or more code points further indicate a first period combination, a second period combination, a third period combination, or a fourth period combination, or the one or more code points further indicate a first duration combination, a second duration combination, a third duration combination, or a fourth duration combination.

17. The method of claim 11 or 12, wherein, One or more of the four code points of the indication information indicates that the SSB burst indication information is a valid value, and one of the 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. The one or more code points further indicate a first period combination, a second period combination, a third period combination, or a fourth period combination, or the one or more code points further indicate a first duration combination, a second duration combination, a third duration combination, or a fourth duration combination.

18. The method of claim 11 or 12, wherein, One or more of the eight code points 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 code points of the indication information other than the one or more code points indicates that both the PRACH resource indication information and the SSB burst indication information are not valid values. The one or more code points further indicate a first period combination, a second period combination, a third period combination, or a fourth period combination, or the one or more code points further indicate a first duration combination, a second duration combination, a third duration combination, or a fourth duration combination. 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. The fourth period combination is a second period of the PRACH resource and a period of the second type of SSB burst. 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.

19. The method of claim 11 or 12, wherein, 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. 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.

20. The method of claim 11 or 12, wherein, 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. 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.

21. A method of communication, comprising: The method is applied to a terminal device; the method comprises: After the terminal device receives a message 4 (Msg4), it is determined to terminate using the second type of PRACH resource or the second type of SSB burst indication information, 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.

22. A method of communication, comprising: The method is applied to a network device; the method comprises: After the network device sends to 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.

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

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

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

26. A computer-readable storage medium, characterized in that, The computer program or instructions stored therein, when executed, implement the steps of the method of any one of claims 1-22.

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