Method and device for transmitting random access preamble

Abstract

The invention provides a method and a device for transmitting a random access preamble. The method comprises the following steps: receiving indication information, wherein the indication information is used for indicating a difference value; and sending a random access preamble, wherein the sending power of the random access preamble is determined according to the difference value, the expected receiving power, the path loss used for transmitting a synchronization signal block SSB and the maximum power of a terminal sending signal. According to the method, the terminal can determine the transmitting power of the random access preamble according to the difference value indicated by the network equipment, so that the communication efficiency is improved.

Description

[0001] This application is a divisional application. The application number of the original application is 202080093057.4, and the original application date is January 21, 2020. The entire contents of the original application are incorporated into this application by reference. Technical Field

[0002] The present application relates to the field of communications, and more specifically, to a method and device for transmitting a random access preamble. Background Art

[0003] The development of mobile services has placed increasing demands on the data rate and efficiency of wireless communications. In order to increase the data rate, NR introduces high-frequency bands for communication. However, the path loss of high-frequency bands in space (hereinafter referred to as "path loss") is relatively large (for example, the signal path loss of 30GHz frequency is 100 times greater than that of 3GHz frequency). Therefore, in order to reduce the impact of signal path loss, NR uses beamforming technology to limit the energy of the signal to a certain beam direction. Beamforming technology can effectively expand the transmission distance and range of the signal and reduce signal interference, thereby achieving higher communication efficiency and obtaining higher network capacity.

[0004] However, in a communication network using beamforming technology, it is first necessary to match the transmit beam and the receive beam so that the gain from the transmitter to the receiver is maximized, otherwise the communication efficiency is low. For example, the network device uses a full beam to send a synchronization signal block (SSB), and the terminal uses a certain beam to receive the SSB so that a matching transmit beam of the network device is found for each receive beam of the terminal. The terminal can also send a random access preamble using a full beam, and the network device uses a receive beam to receive the random access preamble so that a matching transmit beam of the terminal is found for each receive beam of the network device.

[0005] In the beam matching process, since the terminal cannot know the path loss of the random access preamble, it is unable to determine the transmission power of the random access preamble, and the terminal cannot control the coverage distance of the random access preamble, which reduces the communication efficiency. Therefore, how to transmit the random access preamble needs to be solved urgently. Summary of the invention

[0006] The present application provides a method and device for transmitting a random access preamble, which can control the coverage distance of the random access preamble, thereby improving communication efficiency.

[0007] In a first aspect, a method for transmitting a random access preamble is provided, the method comprising: receiving indication information, the indication information being used to indicate whether a first path loss is the same as a second path loss, the first path loss being a path loss used to transmit the random access preamble, and the second path loss being a path loss used to transmit a synchronization signal block SSB; sending the random access preamble, the random access preamble being used for a terminal to perform random access, the transmission power of the random access preamble being associated with the first path loss, and the first path loss being determined by the indication information and the second path loss.

[0008] The terminal receives the indication information, and can indicate whether the first path loss and the second path loss are the same in combination with the indication information, and determine the first path loss according to the second path loss. If the indication information indicates that the second path loss is the same as the first path loss, the terminal can determine the second path loss as the first path loss. For example, if the signal transmission between the terminal and the network device can adopt wide beam and narrow beam, then when the second path loss is wide beam, the first path loss is wide beam; when the second path loss is narrow beam, the first path loss is narrow beam. If the indication information indicates that the second path loss is different from the first path loss, the terminal can determine other path losses as the first path loss. In a scenario where the communication system includes two or more known path losses, if the second path loss is different from the first path loss, the terminal can select one from the multiple known path losses as the first path loss. For example, if the signal transmission between the terminal and the network device usually has only two forms of wide beam and narrow beam, then when the second path loss is wide beam, the first path loss is narrow beam; when the second path loss is narrow beam, the first path loss is wide beam. Afterwards, the terminal can set the transmission power of the random access preamble according to the path loss (ie, the first path loss) of the random access preamble transmitted between the terminal and the network device, and can flexibly control the coverage distance of the random access preamble, thereby improving communication efficiency.

[0009] In some possible implementations, the indication information includes a repeated field or a non-repeated field, the repeated field is used to indicate that the first path loss is the same as the second path loss, and the non-repeated field is used to indicate that the first path loss is different from the second path loss.

[0010] The terminal can distinguish the content indicated by the indication information according to the different fields included in the indication information, and the fields in the indication information can be fields in the prior art. In other words, the network device can reuse existing fields in the prior art, thereby saving signaling overhead.

[0011] In some possible implementations, when the indication information indicates that the first path loss is different from the second path loss, the indication information further includes a path loss difference between the first path loss and the second path loss, and the first path loss is determined by the path loss difference and the second path loss.

[0012] The indication information may include a path loss difference between the first path loss and the second path loss, so that the terminal can obtain the first path loss based on the path loss difference and the second path loss, so that the network device can flexibly set the value of the second path loss, which helps to enable the terminal to have a variety of transmission powers, so that the terminal can flexibly control the coverage distance of the random access preamble, thereby helping to further improve communication efficiency.

[0013] In some possible implementations, the SSB is associated with at least two random access opportunities, wherein the sending of the random access preamble includes: sending the random access preamble at at least one random access opportunity among the at least two random access opportunities.

[0014] SSB can be associated with one or more random access opportunities, and the terminal can send a random access preamble in a random access opportunity associated with SSB. In addition, the network device can enable different terminals to send random access preambles at different random access opportunities through the association relationship between SSB and random access opportunities, thereby avoiding interference in the transmission of random access preambles between different terminals.

[0015] In some possible implementations, the method further includes: receiving one or more random access response messages associated with the random access preamble, wherein the one or more random access response messages are scrambled by a first radio network temporary identifier RNTI.

[0016] The network device may receive one or more random access preambles and feed back a random access response message to the terminal. The one or more random access response messages may be scrambled by the first RNTI. That is, if there are multiple random access response messages, the multiple random access response messages are scrambled by the same RNTI. This reduces the complexity of descrambling the RNTI.

[0017] In some possible implementations, the receiving of the random access response message of the random access preamble includes: receiving the random access response message of the random access preamble in a first window, the starting position of the first window being the starting position of the random access response window associated with the first random access opportunity of the at least two random access opportunities, and the ending position of the first window being the ending position of the random access response window associated with the last random access opportunity of the at least two random access opportunities.

[0018] In the scenario where the terminal sends a random access preamble in at least two random access opportunities, the RAR window can be flexibly set, avoiding the waste of random access opportunities and the terminal power consumption overhead caused by waiting for the random access response message corresponding to the random access preamble in a fixed RAR window. In other words, the flexible setting of the RAR window saves the power consumption overhead of the terminal.

[0019] In some possible implementations, the method further includes:

[0020] One or more random access response messages associated with the random access preamble are received, where a first random access response message among the one or more random access response messages is scrambled by the RNTI corresponding to a first random access opportunity among the at least two random access opportunities, wherein the first random access response message is used to respond to a random access preamble transmitted through the first random access opportunity.

[0021] The network device may feed back multiple random access response messages to the terminal within a RAR window. The RNTIs for scrambling the multiple random access response messages may be determined according to the random access timing when the random access preamble is sent. That is, the random access timing and the RNTI have a mapping relationship, and the RNTI for scrambling the first random access response message by the network device has a mapping relationship with the random access timing of the first random access preamble corresponding to the first random access response message. This helps the terminal identify the random access response messages corresponding to different random access preambles.

[0022] In a second aspect, a method for transmitting a random access preamble is provided, the method comprising: sending indication information, the indication information being used to indicate whether a first path loss is the same as a second path loss, the first path loss being a path loss used to transmit the random access preamble, and the second path loss being a path loss used to transmit a synchronization signal block SSB; receiving the random access preamble sent by a terminal, the random access preamble being used for the terminal to perform random access, the transmission power of the random access preamble being associated with the first path loss, and the first path loss being determined by the indication information and the second path loss.

[0023] The network device sends indication information to the terminal. The terminal can indicate whether the first path loss and the second path loss are the same in combination with the indication information, and determine the first path loss according to the second path loss. If the indication information indicates that the second path loss is the same as the first path loss, the terminal can determine the second path loss as the first path loss. For example, if the signal transmission between the terminal and the network device can adopt a wide beam and a narrow beam, then when the second path loss is a wide beam, the first path loss is a wide beam; when the second path loss is a narrow beam, the first path loss is a narrow beam. If the indication information indicates that the second path loss is different from the first path loss, the terminal can determine other path losses as the first path loss. In a scenario where the communication system includes two or more known path losses, if the second path loss is different from the first path loss, the terminal can select one from the multiple known path losses as the first path loss. For example, if the signal transmission between the terminal and the network device usually has only two forms: wide beam and narrow beam, then when the second path loss is a wide beam, the first path loss is a narrow beam; when the second path loss is a narrow beam, the first path loss is a wide beam. Afterwards, the terminal can set the transmission power of the random access preamble according to the path loss (i.e., the first path loss) of the random access preamble transmitted between the terminal and the network device, and can flexibly control the coverage distance of the random access preamble, thereby improving communication efficiency.

[0024] In some possible implementations, the indication information includes a repeated field or a non-repeated field, the repeated field is used to indicate that the first path loss is the same as the second path loss, and the non-repeated field is used to indicate that the first path loss is different from the second path loss.

[0025] The terminal can distinguish the content indicated by the indication information according to the different fields included in the indication information, and the fields in the indication information can be fields in the prior art. In other words, the network device can reuse existing fields in the prior art, thereby saving signaling overhead.

[0026] In some possible implementations, when the indication information indicates that the first beam is different from the second beam, the indication information further includes a path loss difference between the first path loss and the second path loss.

[0027] The indication information may include a path loss difference between the first path loss and the second path loss, so that the terminal can obtain the first path loss based on the path loss difference and the second path loss, so that the network device can flexibly set the value of the second path loss, which helps to enable the terminal to have a variety of transmission powers, so that the terminal can flexibly control the coverage distance of the random access preamble, thereby helping to further improve communication efficiency.

[0028] In some possible implementations, the SSB is associated with at least two random access opportunities, and the receiving the random access preamble includes: receiving the random access preamble at at least one random access opportunity among the at least two random access opportunities.

[0029] SSB can be associated with one or more random access opportunities, and the terminal can send a random access preamble in a random access opportunity associated with SSB. In addition, the network device can enable different terminals to send random access preambles at different random access opportunities through the association relationship between SSB and random access opportunities, thereby avoiding interference in the transmission of random access preambles between different terminals.

[0030] In some possible implementations, the method further includes: sending one or more random access response messages associated with the random access preamble, the one or more random access response messages being scrambled by the first RNTI.

[0031] The network device may receive one or more random access preambles and feed back a random access response message to the terminal. The one or more random access response messages may be scrambled by the first RNTI. That is, if there are multiple random access response messages, the multiple random access response messages are scrambled by the same RNTI. This reduces the complexity of descrambling the RNTI.

[0032] In some possible implementations, the method further includes: sending one or more random access response messages associated with the random access preamble, wherein a first random access response message among the one or more random access response messages is scrambled by the RNTI corresponding to a first random access opportunity among the at least two random access opportunities, wherein the first random access response message is used to respond to a random access preamble transmitted through the first random access opportunity.

[0033] The network device may feed back multiple random access response messages to the terminal within a RAR window. The RNTIs for scrambling the multiple random access response messages may be determined according to the random access timing when the random access preamble is sent. That is, the random access timing and the RNTI have a mapping relationship, and the RNTI for scrambling the first random access response message by the network device has a mapping relationship with the random access timing of the first random access preamble corresponding to the first random access response message. This helps the terminal identify the random access response messages corresponding to different random access preambles.

[0034] In a third aspect, a method for transmitting a random access preamble is provided, the method comprising:

[0035] Sending a random access preamble in at least two random access opportunities within the first window, where the random access preamble is used for the terminal to perform random access;

[0036] receiving one or more random access response messages associated with the random access preamble.

[0037] The terminal sends the random access preamble at as many random access opportunities as possible within a window, thereby helping to increase the probability that the base station receives the random access preamble.

[0038] In some possible implementations, the random opportunity within the first window is a random access opportunity associated with an SSB.

[0039] The first window may be all or part of the random access opportunities associated with the SSB. In other words, the size of the first window is flexibly set, thereby increasing the flexibility of sending the random access preamble at the random access opportunity.

[0040] In some possible implementations, the one or more random access response messages are scrambled by the first radio network temporary identifier RNTI.

[0041] If there are multiple random access response messages, the multiple random access response messages are scrambled using the same RNTI, thereby reducing the signaling overhead of scrambling the random access response messages.

[0042] In some possible implementations, a first random access response message among the one or more random access response messages is scrambled by an RNTI corresponding to a first random access opportunity among the at least two random access opportunities, wherein the first random access response message is used to respond to a random access preamble transmitted through the first random access opportunity.

[0043] The terminal can identify the random access response messages corresponding to different random access preambles, thereby improving the flexibility of random access preamble transmission.

[0044] In a fourth aspect, a method for transmitting a random access preamble is provided, the method comprising:

[0045] receiving a random access preamble in at least two random access opportunities within the first window, where the random access preamble is used for the terminal to perform random access;

[0046] and sending one or more random access response messages associated with the random access preamble.

[0047] The terminal sends the random access preamble at as many random access opportunities as possible within a window, thereby helping to increase the probability that the base station receives the random access preamble.

[0048] In some possible implementations, the random opportunity within the first window is a random access opportunity associated with an SSB.

[0049] The first window may be all or part of the random access opportunities associated with the SSB. In other words, the size of the first window is flexibly set, thereby increasing the flexibility of sending the random access preamble at the random access opportunity.

[0050] In some possible implementations, the one or more random access response messages are scrambled by the first radio network temporary identifier RNTI.

[0051] If there are multiple random access response messages, the multiple random access response messages are scrambled using the same RNTI, thereby reducing the signaling overhead of scrambling the random access response messages.

[0052] In some possible implementations, a first random access response message among the one or more random access response messages is scrambled by an RNTI corresponding to a first random access opportunity among the at least two random access opportunities, wherein the first random access response message is used to respond to a random access preamble transmitted through the first random access opportunity.

[0053] The terminal can identify the random access response messages corresponding to different random access preambles, thereby improving the flexibility of random access preamble transmission.

[0054] In a fifth aspect, a device for transmitting a random access preamble is provided, which may be a terminal or a chip in a terminal. The device has the function of implementing the first aspect and various possible implementations. The function may be implemented by hardware or by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above functions.

[0055] In one possible design, the device includes: a transceiver module, which may include a receiving module and a sending module. The device also includes a processing module. The transceiver module may be, for example, at least one of a transceiver, a receiver, and a transmitter, and the transceiver module may include a radio frequency circuit or an antenna. The processing module may be a processor. Optionally, the device also includes a storage module, which may be, for example, a memory. When a storage module is included, the storage module is used to store instructions. The processing module is connected to the storage module, and the processing module may execute instructions stored in the storage module or instructions derived from other sources, so that the device executes the above-mentioned first aspect, and the communication method of various possible implementation methods. In this design, the device may be a terminal.

[0056] In another possible design, when the device is a chip, the chip includes: a transceiver module, which may include a receiving module and a sending module. The device also includes a processing module. The transceiver module may be, for example, an input / output interface, a pin or a circuit on the chip. The processing module may be, for example, a processor. The processing module may execute instructions so that the chip in the terminal executes the first aspect described above, as well as any possible communication method. Optionally, the processing module may execute instructions in a storage module, which may be a storage module in the chip, such as a register, a cache, etc. The storage module may also be located in the communication device but outside the chip, such as a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM), etc.

[0057] Among them, the processor mentioned in any of the above places can be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of programs of the above-mentioned communication methods.

[0058] In a sixth aspect, a device for transmitting a random access preamble is provided, which may be a network device or a chip in a network device. The device has the function of implementing the second aspect and various possible implementations. The function may be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0059] In one possible design, the device includes: a transceiver module, which may include a receiving module and a sending module. The device also includes a processing module. The transceiver module may be, for example, at least one of a transceiver, a receiver, and a transmitter, and the transceiver module may include a radio frequency circuit or an antenna. The processing module may be a processor.

[0060] Optionally, the device further includes a storage module, which may be, for example, a memory. When the storage module is included, the storage module is used to store instructions. The processing module is connected to the storage module, and the processing module may execute instructions stored in the storage module or instructions derived from other sources, so that the device performs the above-mentioned second aspect, or any one of the methods thereof.

[0061] In another possible design, when the device is a chip, the chip includes: a transceiver module, which may include a receiving module and a sending module. The device also includes a processing module. The transceiver module may be, for example, an input / output interface, a pin or a circuit on the chip. The processing module may be, for example, a processor. The processing module may execute instructions so that the chip in the network device executes the second aspect and any possible communication method.

[0062] Optionally, the processing module may execute instructions in a storage module, and the storage module may be a storage module within a chip, such as a register, a cache, etc. The storage module may also be located within the communication device but outside the chip, such as a ROM or other types of static storage devices that can store static information and instructions, a RAM, etc.

[0063] The processor mentioned in any of the above may be a CPU, a microprocessor, an application specific integrated circuit ASIC, or one or more integrated circuits for controlling the execution of programs of the above-mentioned communication methods.

[0064] In a seventh aspect, a device for transmitting a random access preamble is provided, which may be a terminal or a chip in a terminal. The device has the function of implementing the third aspect and various possible implementations. The function may be implemented by hardware or by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above functions.

[0065] In one possible design, the device includes: a transceiver module, which may include a receiving module and a sending module. The device also includes a processing module. The transceiver module may be, for example, at least one of a transceiver, a receiver, and a transmitter, and the transceiver module may include a radio frequency circuit or an antenna. The processing module may be a processor. Optionally, the device also includes a storage module, which may be, for example, a memory. When a storage module is included, the storage module is used to store instructions. The processing module is connected to the storage module, and the processing module may execute instructions stored in the storage module or instructions derived from other sources, so that the device executes the third aspect above, and the communication method of various possible implementations. In this design, the device may be a terminal.

[0066] In another possible design, when the device is a chip, the chip includes: a transceiver module, which may include a receiving module and a sending module. The device also includes a processing module. The transceiver module may be, for example, an input / output interface, a pin or a circuit on the chip. The processing module may be, for example, a processor. The processing module may execute instructions so that the chip in the terminal executes the third aspect above, as well as any possible communication method. Optionally, the processing module may execute instructions in a storage module, which may be a storage module in the chip, such as a register, a cache, etc. The storage module may also be located in the communication device but outside the chip, such as a ROM or other types of static storage devices that can store static information and instructions, RAM, etc.

[0067] The processor mentioned in any of the above may be a CPU, a microprocessor, an ASIC, or one or more integrated circuits for controlling the execution of programs of the above-mentioned communication methods.

[0068] In an eighth aspect, a device for transmitting a random access preamble is provided, which may be a network device or a chip in a network device. The device has the function of implementing the fourth aspect and various possible implementations. The function may be implemented by hardware or by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above functions.

[0069] In one possible design, the device includes: a transceiver module, which may include a receiving module and a sending module. The device also includes a processing module. The transceiver module may be, for example, at least one of a transceiver, a receiver, and a transmitter, and the transceiver module may include a radio frequency circuit or an antenna. The processing module may be a processor.

[0070] Optionally, the device further includes a storage module, which may be, for example, a memory. When the storage module is included, the storage module is used to store instructions. The processing module is connected to the storage module, and the processing module may execute instructions stored in the storage module or instructions derived from other sources, so that the device performs the fourth aspect above, or any one of the methods thereof.

[0071] In another possible design, when the device is a chip, the chip includes: a transceiver module, which may include a receiving module and a sending module. The device also includes a processing module. The transceiver module may be, for example, an input / output interface, a pin or a circuit on the chip. The processing module may be, for example, a processor. The processing module may execute instructions so that the chip in the network device executes the fourth aspect and any possible communication method.

[0072] Optionally, the processing module may execute instructions in a storage module, and the storage module may be a storage module within a chip, such as a register, a cache, etc. The storage module may also be located within the communication device but outside the chip, such as a ROM or other types of static storage devices that can store static information and instructions, a RAM, etc.

[0073] The processor mentioned in any of the above may be a CPU, a microprocessor, an ASIC, or one or more integrated circuits for controlling the execution of programs of the above-mentioned communication methods.

[0074] In a ninth aspect, a computer storage medium is provided, in which a program code is stored, and the program code is used to indicate instructions for executing the method in the above-mentioned first aspect and any possible implementation thereof.

[0075] In a tenth aspect, a computer storage medium is provided, in which a program code is stored, and the program code is used to indicate instructions for executing the method in the above-mentioned second aspect and any possible implementation thereof.

[0076] In an eleventh aspect, a computer storage medium is provided, in which a program code is stored, and the program code is used to indicate instructions for executing the method in the third aspect and any possible implementation thereof.

[0077] In a twelfth aspect, a computer storage medium is provided, in which a program code is stored, and the program code is used to indicate instructions for executing the method in the fourth aspect and any possible implementation thereof.

[0078] In a thirteenth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute the method in the above-mentioned first aspect, or any possible implementation thereof.

[0079] In a fourteenth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute the method in the above-mentioned second aspect, or any possible implementation thereof.

[0080] In a fifteenth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute the method in the third aspect above, or any possible implementation thereof.

[0081] In a sixteenth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute the method in the fourth aspect above, or any possible implementation thereof.

[0082] In the seventeenth aspect, a communication system is provided, which includes the device described in the fifth aspect and the device described in the sixth aspect.

[0083] In the eighteenth aspect, a communication system is provided, which includes the device described in the seventh aspect and the device described in the eighth aspect.

[0084] Based on the above technical solution, the terminal receives the indication information, and can indicate whether the first path loss and the second path loss are the same in combination with the indication information, and determine the first path loss according to the second path loss. Afterwards, the terminal can set the transmission power of the random access preamble according to the path loss (i.e., the first path loss) of the random access preamble transmitted between the terminal and the network device, and can flexibly control the coverage distance of the random access preamble, thereby improving communication efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0085] Figure 1 is a schematic diagram of a communication system of the present application;

[0086] Figure 2 is a schematic diagram of a random access process of a four-step random access type in a conventional scheme;

[0087] Figure 3 is a schematic diagram of a random access process of a two-step random access type in a conventional scheme;

[0088] Figure 4 is a schematic flowchart of a method for transmitting a random access preamble according to an embodiment of the present application;

[0089] Figure 5 is a schematic diagram of transmitting a random access preamble according to a specific embodiment of the present application;

[0090] Figure 6 is a schematic diagram of transmitting a random access preamble in another specific embodiment of the present application;

[0091] Figure 7 is a schematic flowchart of a method for transmitting a random access preamble according to another embodiment of the present application;

[0092] Figure 8 is a schematic block diagram of an apparatus for transmitting a random access preamble according to an embodiment of the present application;

[0093] Fig. 9 is a schematic structural diagram of an apparatus for transmitting a random access preamble according to an embodiment of the present application;

[0094] Fig.10 is a schematic block diagram of an apparatus for transmitting a random access preamble according to another embodiment of the present application;

[0095] Fig.11is a schematic structural diagram of an apparatus for transmitting a random access preamble according to another embodiment of the present application;

[0096] Fig.12 is a schematic diagram of a device for transmitting a random access preamble according to another specific embodiment of the present application;

[0097] Fig.13 is a schematic diagram of a device for transmitting a random access preamble according to another specific embodiment of the present application;

[0098] Fig.14 is a schematic diagram of a device for transmitting a random access preamble according to another specific embodiment of the present application;

[0099] Fig.15 It is a schematic diagram of a device for transmitting a random access preamble according to another specific embodiment of the present application. DETAILED DESCRIPTION

[0100] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0101] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: global system for mobile communications (GSM) system, code division multiple access (CDMA) system, wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, future fifth generation (5G) system or new radio (NR), etc.

[0102] The terminal in the embodiments of the present application may refer to a user device, an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal device, a wireless communication device, a user agent or a user device. The terminal may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal in a future 5G network or a terminal in a future evolved public land mobile communication network (PLMN), etc., and the embodiments of the present application are not limited to this.

[0103] The network device in the embodiment of the present application may be a device for communicating with a terminal. The network device may be a base station (base transceiver station, BTS) in a global system for mobile communications (GSM) system or code division multiple access (CDMA), or a base station (NodeB, NB) in a wideband code division multiple access (WCDMA) system, or an evolved base station (eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (CRAN) scenario, or the network device may be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a future 5G network, or a network device in a future evolved PLMN network, one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (DU), etc., and the embodiment of the present application is not limited.

[0104] In some deployments, the gNB may include a centralized unit (CU) and a DU. The gNB may also include an active antenna unit (AAU). The CU implements some functions of the gNB, and the DU implements some functions of the gNB. For example, the CU is responsible for processing non-real-time protocols and services, and implementing the functions of the radio resource control (RRC) and packet data convergence protocol (PDCP) layers. The DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC) layer, the media access control (MAC) layer, and the physical (PHY) layer. The AAU implements some physical layer processing functions, radio frequency processing, and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be converted from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by the DU, or by the DU+AAU. It can be understood that the network device can be a device including one or more of a CU node, a DU node, and an AAU node. In addition, the CU may be classified as a network device in an access network (radio access network, RAN), or the CU may be classified as a network device in a core network (core network, CN), which is not limited in the present application.

[0105] In an embodiment of the present application, a terminal or network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also called main memory). The operating system can be any one or more computer operating systems that implement business processing through a process, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer includes applications such as a browser, an address book, a word processing software, and an instant messaging software. In addition, the embodiment of the present application does not specifically limit the specific structure of the execution subject of the method provided in the embodiment of the present application, as long as it can communicate according to the method provided in the embodiment of the present application by running a program that records the code of the method provided in the embodiment of the present application, for example, the execution subject of the method provided in the embodiment of the present application can be a terminal or a network device, or a functional module in a terminal or a network device that can call a program and execute the program.

[0106] In addition, various aspects or features of the present application can be implemented as methods, devices or products using standard programming and / or engineering techniques. The term "product" used in this application covers computer programs that can be accessed from any computer-readable device, carrier or medium. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks or tapes, etc.), optical disks (e.g., compact discs (CDs), digital versatile discs (DVDs), etc.), smart cards and flash memory devices (e.g., erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.). In addition, the various storage media described herein may represent one or more devices and / or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing and / or carrying instructions and / or data.

[0107] Figure 1 It is a schematic diagram of a communication system of the present application. Figure 1 The communication system in the embodiment may include at least one terminal (e.g., terminal 10, terminal 20, terminal 30, terminal 40, terminal 50, and terminal 60) and a network device 70. The network device 70 is used to provide communication services for the terminal and access the core network. The terminal can access the network by searching for synchronization signals, broadcast signals, etc. sent by the network device 70, thereby communicating with the network. Figure 1 The terminals 10, 20, 30, 40 and 60 in the network device 70 can perform uplink and downlink transmission with the network device 70. For example, the network device 70 can send downlink signals to the terminals 10, 20, 30, 40 and 60, and can also receive uplink signals sent by the terminals 10, 20, 30, 40 and 60.

[0108] In addition, the terminal 40 , the terminal 50 and the terminal 60 may also be regarded as a communication system. The terminal 60 may send downlink signals to the terminal 40 and the terminal 50 , and may also receive uplink signals sent by the terminal 40 and the terminal 50 .

[0109] It should be noted that the embodiments of the present application can be applied to a communication system including one or more network devices, and can also be applied to a communication system including one or more terminals, and the present application does not limit this.

[0110] It should be understood that the network device included in the communication system may be one or more. One network device may send data or control signaling to one or more terminals. Multiple network devices may also send data or control signaling to one or more terminals at the same time.

[0111] The following is a detailed introduction to the terms involved in this application:

[0112] 1. Beam:

[0113] The embodiment of beam in NR protocol can be spatial domain filter, or spatial filter or spatial parameter. The beam used to send signals can be called transmission beam (Tx beam), can be called spatial domain transmission filter or spatial transmission parameter; the beam used to receive signals can be called reception beam (Rx beam), can be called spatial domain receive filter or spatial receive parameter.

[0114] The transmit beam may refer to the distribution of signal strength in different directions of space after the signal is transmitted by the antenna, and the receive beam may refer to the distribution of signal strength in different directions of space of the wireless signal received from the antenna.

[0115] In addition, the beam may be a wide beam, a narrow beam, or other types of beams. The technology for forming the beam may be a beamforming technology or other technologies. The beamforming technology may specifically be a digital beamforming technology, an analog beamforming technology, or a hybrid digital / analog beamforming technology.

[0116] Beams generally correspond to resources. For example, when performing beam measurement, the network device measures different beams through different resources. The terminal feeds back the measured resource quality, and the network device knows the quality of the corresponding beam. During data transmission, beam information is also indicated through its corresponding resources. For example, the network device indicates the terminal PDSCH beam information through the resources in the TCI (transmission configuration indicator) of the DCI.

[0117] Optionally, multiple beams with the same or similar communication characteristics are regarded as one beam. One beam may include one or more antenna ports for transmitting data channels, control channels, and sounding signals. One or more antenna ports forming a beam may also be regarded as an antenna port set.

[0118] In beam measurement, each beam of the network device corresponds to a resource, so the beam corresponding to the resource can be uniquely identified by the resource index.

[0119] 2. Resources:

[0120] In beam measurement, the beam corresponding to the resource can be uniquely identified by the index of the resource. The resource can be an uplink signal resource or a downlink signal resource. The uplink signal includes but is not limited to a sounding reference signal (SRS) and a demodulation reference signal (DMRS). The downlink signal includes but is not limited to a channel state information reference signal (CSI-RS), a cell specific reference signal (CS-RS), a UE specific reference signal (US-RS), a demodulation reference signal (DMRS), and a synchronization signal / physical broadcast channel block (SS / PBCH block). Among them, the SS / PBCH block can be referred to as a synchronization signal block (SSB).

[0121] Resources are configured through radio resource control (RRC) signaling. In terms of configuration structure, a resource is a data structure, including relevant parameters of the corresponding uplink / downlink signal, such as the type of uplink / downlink signal, the resource element carrying the uplink / downlink signal, the transmission time and period of the uplink / downlink signal, the number of ports used to send the uplink / downlink signal, etc. Each uplink / downlink signal resource has a unique index to identify the resource of the uplink / downlink signal. It can be understood that the index of the resource can also be called the identification of the resource, and the embodiments of the present application do not impose any restrictions on this.

[0122] 3. Quasi-co-location (QCL):

[0123] The co-location relationship is used to indicate that multiple resources have one or more identical or similar communication characteristics. For multiple resources with a co-location relationship, the same or similar communication configuration can be used. For example, if two antenna ports have a co-location relationship, the large-scale characteristics of the channel for transmitting a symbol on one port can be inferred from the large-scale characteristics of the channel for transmitting a symbol on the other port. The large-scale characteristics may include: delay spread, average delay, Doppler spread, Doppler shift, average gain, receiving parameters, terminal receiving beam number, transmit / receive channel correlation, receiving arrival angle, spatial correlation of receiver antenna, main arrival angle (Angel-of-Arrival, AoA), average arrival angle, extension of AoA, etc. The parameters of quasi-co-location include: at least one of Doppler spread, Doppler shift, average delay, delay spread and spatial reception parameters. QCL relationships can be divided into four categories: 'QCL-TypeA': {Doppler shift, Doppler spread, average delay, delay spread}; 'QCL-TypeB': {Doppler shift, Doppler spread}; 'QCL-TypeC': {Doppler shift, average delay}; - 'QCL-TypeD': {spatial reception parameters}.

[0124] Message 1 (Msg1): a random access preamble or sequence, carried by the physical random access channel (PRACH). It is usually used to initiate connection requests, handover requests, synchronization requests, and scheduling requests between devices and networks.

[0125] Message 2 (Msg2): Also known as the random access response (RAR) message. It is the network's response to the received message 1. One message 2 can respond to multiple Msg1s. If the network receives message 1, it will encapsulate and send at least one of the following information: the index of message 1 (random access preamble identity, RAPID), uplink scheduling authorization (uplink grant), timing advance (timing advance), temporary cell radio network temporary identity (temporary cell radio network temporary identity, TC-RNTI), etc. The network can respond to multiple Msg1s in the same Msg2. The protocol defines a RAR-window to receive message 2. If the terminal does not receive message 2 within the time period of the RAR window, it is considered that message 1 has failed to be sent. Random access-radio network temporary identity (RA-RNTI) is used to scramble the PDCCH of message 2. The terminal can identify its own message 2 according to the RA-RNTI. Each RA-RNTI uniquely corresponds to an RO, and the generation of the RA-RNTI is related to the time-frequency resource position of the RO.

[0126] The configuration information in the present invention can be configured by the network device and sent to the terminal. The configuration information can be carried in any one of the physical broadcast channel (PBCH), remaining minimum system information (RMSI), system information block (SIB) 1, SIB2, SIB3, media access control element (MAC-CE), downlink control information (DCI), radio resource control (RRC) and system information. Among them, the association relationship in the embodiment of the present application can also be specified by the standard, or pre-agreed by the network device and the terminal.

[0127] The synchronization signal block may also be referred to as a synchronization signal / physical broadcast channel (PBCH, SS / PBCH block) block, or simply referred to as SSB, and may include at least one of PBCH, a primary synchronization signal (PSS), and a secondary synchronization signal (SSS).

[0128] It should be noted that with the continuous development of technology, the terms of the embodiments of the present application may change, but they are all within the scope of protection of the present application.

[0129] In order to facilitate understanding of the technical solution of the present application, a brief introduction to the relevant technologies involved in the present application is first given.

[0130] Figure 2 FIG. 1 shows a schematic diagram of a random access process of a four-step random access type in a traditional solution. After the terminal selects a suitable cell and completes the residency, it can initiate random access. Figure 4 As shown, the UE sends message 1 (message 1, abbreviated as msg 1) to the network device, and message 1 is also the random access preamble. After the network device detects the random access preamble, it returns a response message to the UE, which is message 2. Message 2 contains the uplink resources allocated by the network device to the UE. After receiving message 2, the UE sends message 3 on the uplink resources indicated by message 2. If the network device can correctly decode message 3, it returns message 4 to the UE, and message 4 is used to notify the UE that the competition is successful. After the above four steps, the random access process is successful.

[0131] Figure 3A schematic diagram of a random access process of a two-step random access type in a conventional scheme is shown. In the two-step random access process, the UE carries both the random access preamble and data (i.e., preamble and data) in message A. The data portion is used for contention resolution, such as a radio resource control (RRC) message. If there is no conflict between UEs, the network device returns message B to the UE after successfully decoding message 1. Message B includes both a response to the random access preamble and a response to the data. Among them, the response to the random access preamble is also a random access response (RAR). The response to the data is usually an RRC message. The two responses can be sent simultaneously or successively. The UE can decode the two responses independently. The UE learns that the random access is successful after receiving message 2. If there is a conflict between UEs, the network device may not be able to successfully decode the data in message A, and the network device does not send message 2 to the UE. After sending message 1, the UE waits for a time window, and if message 2 is not received, it is considered that the random access has failed.

[0132] In the traditional solution, during the beam matching process, the network device uses a full beam to send SSB, and the terminal uses a certain beam to receive the SSB, so that a matching network device transmission beam can be found for each receiving beam of the terminal. The terminal can also send a random access preamble with a full beam, and the network device uses a receiving beam to receive the random access preamble, so that a matching terminal transmission beam can be found for each receiving beam of the network device. However, since the terminal cannot know the path loss of the random access preamble, and thus cannot determine the transmission power of the random access preamble, the terminal cannot determine the coverage distance of the random access preamble, which reduces the communication efficiency. Therefore, how to transmit the random access preamble needs to be solved urgently.

[0133] Figure 4 A schematic flowchart of a method for transmitting a random access preamble according to an embodiment of the present application is shown.

[0134] 401, the terminal receives indication information, the indication information is used to indicate whether a first path loss is the same as a second path loss, the first path loss is the path loss used to transmit a random access preamble, and the second path loss is the path loss used to transmit an SSB. Accordingly, the network device sends the indication information.

[0135] Specifically, the path loss can be understood as the power loss during the signal transmission process. The first path loss is used to indicate the path loss of sending or receiving the random access preamble between the network device and the terminal. In the embodiment of the present application, it can be the path loss used to indicate the terminal to send the random access preamble. The second path loss is used to indicate the path loss of sending or receiving SSB between the terminal and the network device. In the embodiment of the present application, it can be the path loss used to indicate the terminal to receive SSB.

[0136] It is understood that the random access preamble may be Figure 2 Message 1 in the Figure 3 The random access preamble in message A in .

[0137] It can also be understood that the random access preamble can also be replaced by a random access channel (RACH) or a channel state information reference signal (CSI-RS).

[0138] It can also be understood that the path loss used to transmit the random access preamble is the same as the path loss used to transmit the SSB, which can be understood as the transmit beam for sending the random access preamble is the same as the receive beam for receiving the SSB. Among them, the same beam can be understood as the same type of beam, for example, both are wide beams, or both are narrow beams. Or the same beam can also be understood as beams with a QCL relationship (for example, a QCL relationship of average gain, or other QCL relationships). Or the same beam can be understood as the transmit beam and the receive beam being the same beam, or as having a special association relationship between the two, for example, at least one of the delay spread, average delay, Doppler spread, Doppler shift, average gain, receiving parameters, etc. of the two signal receptions is the same.

[0139] It can also be understood that the indication information can indicate whether the path loss of transmitting a certain type or any type of random access preamble is the same as the second path loss, and can also indicate whether the path loss of transmitting a certain random access preamble is the same as the second path loss. For the convenience of description, the following embodiment is based on whether the path loss of transmitting a certain random access preamble is the same as the second path loss, but the present application is not limited to this.

[0140] Optionally, the indication information includes a repetition field or a non-repetition field, the repetition field is used to indicate that the first path loss is the same as the second path loss, and the non-repetition field is used to indicate that the first path loss is different from the second path loss.

[0141] Specifically, the terminal may distinguish the content indicated by the indication information according to different fields included in the indication information.

[0142] Optionally, the indication information may further include a repeated field and a non-repeated field, and whether the first path loss is the same as the second path loss is determined through specific values ​​of the repeated field and the non-repeated field.

[0143] Optionally, the indication information may indicate different contents through the value of the path loss difference, or through whether there is a field indicating the path loss difference.

[0144] Specifically, the network device can determine the content indicated by the indication information according to whether there is a field indicating the path loss difference. If there is a path loss difference field, the network device believes that there is a path loss difference between the path loss of the SSB transmission and the path loss of the random access preamble transmission. If there is no field indicating the path loss difference, the network device believes that the path loss of the SSB transmission and the path loss of the random access preamble transmission are the same.

[0145] Alternatively, the network device may determine the content indicated by the indication information by taking the value of the path loss difference. If the value of the path loss difference is 0, the network device considers that the path loss for transmitting the SSB is the same as the path loss for transmitting the random access preamble. If the value of the path loss difference is not 0, the network device considers that there is a path loss difference between the path loss for transmitting the SSB and the path loss for transmitting the random access preamble.

[0146] It can be understood that the path loss of the network device transmitting SSB and the path loss of the random access preamble are the same, which can be understood as the transmit beam of the network device sending SSB and the receive beam of the random access preamble are the same beam. The path loss difference between the path loss of the network device transmitting SSB and the path loss of the random access preamble can be understood as the transmit beam of the network device sending SSB and the receive beam of the random access preamble are different beams.

[0147] It can also be understood that the path loss difference between the path loss of the network device transmitting the SSB and the path loss of the network device transmitting the random access preamble can be configured by the network device. If the random access preamble is replaced by CSI-RS, the path loss difference is the path loss difference between the path loss of the network device transmitting the SSB and the path loss of the CSI-RS. For example, the network device can configure the CSI-RS through system information. When configuring the CSI-RS, the path loss difference or beam gain difference between the SSB and the CSI-RS can be indicated, that is, the path loss difference between the SSB and the CSI-RS is configured. The random access opportunity can be associated with the CSI-RS, that is, the random access opportunity can have the same transmit beam or the same receive beam as the CSI-RS.

[0148] It can also be understood that the unit of the path loss difference in the embodiment of the present application can be 1 dB or 2 dB, and the configurable value can be any one of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 dB. In addition, the value can be positive or negative.

[0149] It is understandable that the terminal may send the random access preamble in a random access opportunity, for example, the random access preamble may have a mapping relationship with the random access opportunity, wherein the repeated field or the non-repeated field may have a corresponding relationship with the random access opportunity.

[0150] 402, the terminal sends the random access preamble, the random access preamble is used for the terminal to perform random access, the transmission power of the random access preamble is associated with the first path loss, the first path loss is determined by the indication information and the second path loss. Correspondingly, the network device receives the indication information.

[0151] Specifically, the transmission power is associated with the first path loss, and the terminal can set the transmission power of sending the random access preamble according to the path loss (i.e., the first path loss) of the random access preamble transmitted between the terminal and the network device, thereby being able to flexibly control the coverage distance of the random access preamble, thereby improving communication efficiency.

[0152] In addition, the terminal may indicate whether the first path loss and the second path loss are the same in combination with the indication information, and determine the first path loss according to the second path loss. If the indication information indicates that the second path loss is the same as the first path loss, the terminal may determine the second path loss as the first path loss. For example, if the signal transmission between the terminal and the network device can adopt a wide beam and a narrow beam, then when the second path loss is a wide beam, the first path loss is a wide beam; when the second path loss is a narrow beam, the first path loss is a narrow beam.

[0153] If the indication information indicates that the second path loss is different from the first path loss, the terminal may determine the other path loss as the first path loss. In a scenario where the communication system includes two or more known path losses, if the second path loss is different from the first path loss, the terminal may select one of the multiple known path losses as the first path loss. For example, if the signal transmission between the terminal and the network device usually has only two forms, wide beam and narrow beam, then when the second path loss is a wide beam, the first path loss is a narrow beam; when the second path loss is a narrow beam, the first path loss is a wide beam.

[0154] It is understandable that the terminal may obtain the specific value of the second path loss in advance, and the specific acquisition method is not limited in the embodiment of the present application.

[0155] Optionally, when the indication information indicates that the first path loss is different from the second path loss, the indication information includes a path loss difference between the first path loss and the second path loss, so that the terminal can determine the first path loss according to the path loss difference and the second path loss.

[0156] Specifically, the indication information may include a path loss difference between the first path loss and the second path loss, so that the terminal can obtain the first path loss based on the path loss difference and the second path loss, so that the network device can flexibly set the value of the second path loss, thereby helping to enable the terminal to have a variety of transmission powers, so that the terminal can flexibly control the coverage distance of the random access preamble, thereby helping to further improve communication efficiency.

[0157] For example, one implementation method of the terminal determining the first path loss according to the path loss difference and the second path loss is:

[0158] P PRACH,b,f,c (i) = min{P CMAX,f,c (i),(P PRACH,target,f,c +PL b,f,c +G offset )}

[0159] Among them, P PRACH,b,f,c (i) represents the channel power of the terminal sending the random access preamble; P CMAX,f,c (i) represents the maximum power P of the signal sent by the terminal PRACH,target,f,c Indicates the expected receive power configured by the network device; PL b,f,c Indicates the second path loss, G offset Indicates the path loss difference.

[0160] It can be understood that the maximum power of the signal sent by the terminal may be the capability of the terminal, or may be the maximum power value of the signal sent configured by the network device for the terminal.

[0161] Optionally, the SSB is associated with at least two random access opportunities, so that step 404 may specifically be that the terminal sends the random access preamble on at least one random access opportunity of the at least two random access opportunities through the transmission power.

[0162] Specifically, SSB can be associated with one or more random access opportunities, and the terminal can send a random access preamble in the random access opportunity associated with SSB. In addition, the network device can enable different terminals to send random access preambles at different random access opportunities through the association relationship between SSB and random access opportunities, thereby avoiding interference in the transmission of random access preambles between different terminals.

[0163] For example, Figure 5As shown, in one association period, SSB can be associated with four random access opportunities, namely RO1, RO2, RO3 and RO4. The terminal can send a random access preamble in some or all of the four random access opportunities. In addition, the terminal can use different random access opportunities to send a random access preamble in different association periods.

[0164] It should be noted that the terminal sends a random access preamble at more than one random access opportunity among the random access opportunities associated with the SSB, and the multiple random access preambles sent at the more than one random access opportunity may be the same or may be random access preambles with an associated relationship. In other words, the terminal sends the same random access preamble at as many random access opportunities as possible, which can increase the probability that the base station receives the random access preamble. In addition, the network device receives the same or associated random access preambles sent by the terminal at multiple random access opportunities, which can be used to identify the terminal. In other words, when the network device determines that the multiple random access preambles received are the same or have an associated relationship, it can be determined that the multiple random access preambles are from the same terminal.

[0165] It is understandable that the terminal can also send the random access preamble in a random access opportunity that is not associated with the SSB, and this application does not limit this.

[0166] It can also be understood that the terminal can also send other types of random access preambles at the random access opportunity associated with the SSB, and other types of random access preambles can also be sent at one random access opportunity or at multiple random access opportunities, which is not limited in this application. In other words, one random access preamble or multiple different random access preambles, or one type or multiple types of random access preambles may be sent at the same random access opportunity.

[0167] Optionally, the random access opportunity associated with the SSB can be understood as the SSB having a QCL relationship with the random access opportunity.

[0168] Specifically, the random access preamble sent by the terminal at a random access opportunity having a QCL relationship with the same SSB uses the same transmit beam, or has the same gain. Correspondingly, the random access preamble received by the network device at a random access opportunity having a QCL relationship with the same SSB uses the same receive beam, or has the same gain.

[0169] It can be understood that the SSB and the random access opportunities within different random access opportunity association periods can have the same QCL relationship or different QCL relationships.

[0170] For example, SSB has a QCL relationship with random access opportunity 1 (RACH occasion 1, RO1), RO2, RO3 and RO4 in random access opportunity association period 1, and the network device can respectively use beam 1, beam 2, beam 3 and beam 4 to receive the random access preamble. SSB is associated with RO1, RO2, RO3 and RO4 in random access opportunity association period 2, and the network device can respectively use beam 1, beam 2, beam 3 and beam 4 to receive the random access preamble.

[0171] For another example, SSB is associated with RO1, RO2, RO3 and RO4 in random access opportunity association period 1 and the network device uses beam 1, beam 2, beam 3 and beam 4 to receive the random access preamble. SSB is associated with RO1, RO2, RO3 and RO4 in random access opportunity association period 2 and the network device uses beam 4, beam 1, beam 2 and beam 3 to receive the random access preamble.

[0172] That is to say, the network device can configure the association relationship between the SSB and the RO in two or more association periods. The network device can be configured one-to-one or as a whole. In addition, the association relationship between the SSB and the RO in two or more association periods can be the same or different. For example, the configuration is performed in a cyclic offset manner, and one RO can be cyclically offset every period. That is, the network device uses beam 1, beam 2, beam 3 and beam 4 in random access opportunity association period 1 for RO1, RO2, RO3 and RO4 to receive the random access preamble, respectively, and uses beam 4, beam 1, beam 2 and beam 3 in random access opportunity association period 2 for RO1, RO2, RO3 and RO4 to receive the random access preamble.

[0173] In one embodiment, the terminal may receive a random access response message associated with the random access preamble, where the random access response message is scrambled by a first radio network temporary identifier (RNTI).

[0174] Specifically, the network device may receive one or more random access preambles and feed back a random access response message to the terminal. The one or more random access response messages may be scrambled by the first RNTI. That is, if there are multiple random access response messages, the multiple random access response messages are scrambled by the same RNTI.

[0175] It can be understood that the network device can feed back a random access response message for K random access preambles, wherein the value of K can be any one of 1, 2, 3, 4, 5, 6, 7, and 8.

[0176] It can also be understood that the scenario in which the network device feeds back only one random access response message may be that the network device feeds back the random access response message as soon as it detects one random access preamble and stops detecting other random access preambles.

[0177] For example, Figure 5 As shown, the network device may receive one or more random access preambles in at least one random access opportunity in an association period, and send one or more random access response messages to the terminal in the association period.

[0178] Optionally, the terminal can receive a random access response message associated with the random access preamble within a first window, the starting position of the first window being the starting position of the random access response window associated with the first random access opportunity of the at least two random access opportunities, and the ending position of the first window being the ending position of the random access response window associated with the last random access opportunity of the at least two random access opportunities.

[0179] Specifically, the first window may be a random access response (RAR) window. In a scenario where the terminal sends a random access preamble in at least two random access opportunities, the RAR window may be flexibly set. The random access response window associated with the random access opportunity may be a receiving window for a random access response message corresponding to the random access preamble sent at the random access opportunity. For example, Figure 6 As shown, if the SSB is associated with RO1-RO8, and the terminal sends a random access preamble on RO1 and RO8, the RAR window can be set from the start time of the random access response window corresponding to RO1 to the end time of the random access response window corresponding to RO8. The terminal can receive a random access response message within the RAR window.

[0180] It can be understood that the RAR window may also include only one RO-associated random access response window.

[0181] It is also understandable that a RAR window associated with a RO may be after the RO.

[0182] It can also be understood that the specific values ​​of the at least two random access opportunities can be any one of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, and 16.

[0183] In another embodiment, the terminal receives at least one random access response message, each of the at least one random access response message is scrambled for an RNTI corresponding to a corresponding random access opportunity, and each random access response message includes an identifier of a random access preamble corresponding to the random access response message. The terminal determines the random access response message of the random access preamble according to the identifier of the random access preamble in each random access response message.

[0184] Specifically, the network device may feed back multiple random access response messages to the terminal within one RAR window. The RNTIs for scrambling the multiple random access response messages may be determined according to the random access timing when the random access preamble is sent. In other words, the random access timing and the RNTI have a mapping relationship, and the RNTI for scrambling the first random access response message by the network device has a mapping relationship with the random access timing where the first random access preamble corresponding to the first random access response message is located. Figure 5 As shown, RO1 corresponds to RNTI1, RO2 corresponds to RNTI2, RO3 corresponds to RNTI3, and RO4 corresponds to RNTI4, and the first random access response message corresponding to the random access preamble sent by RO1 is scrambled by RNTI1.

[0185] In addition, the first random access response message corresponds to the first random access preamble, that is, the first random access response message is used to respond to the first random access preamble. For example, the first random access response message may carry an identifier of the first random access preamble.

[0186] It can be understood that each random access response message includes an identifier of a random access preamble used for the response message, so that the terminal can determine which random access preamble the random access response message corresponds to according to the identifier of the random access preamble.

[0187] The present application also shows a method for transmitting a random access response message. The terminal can receive an indication of whether the path loss for transmitting the SSB is the same as the path loss for transmitting the random access response message, so that the terminal can determine the path loss for transmitting the random access response message based on the path loss for transmitting the SSB.

[0188] Figure 7 A schematic flowchart of a method for transmitting a random access preamble according to another embodiment of the present application is shown.

[0189] It should be noted that, unless otherwise specified, Figure 7 The same terms in the described embodiment have the same meanings as those in the aforementioned embodiments, and will not be described again here to avoid repetition.

[0190] 701. A terminal sends a random access preamble in at least two random access opportunities in a first window, where the random access preamble is used for the terminal to perform random access. Correspondingly, a network device receives the random access preamble in the at least two random access opportunities.

[0191] Specifically, the terminal sends random access preambles at as many random access opportunities as possible within a window, which can increase the probability that the base station receives the random access preamble.

[0192] It is understandable that the first window may be an RO window, and the terminal sends a random access preamble at a random access opportunity within the RO window, and waits for a random access response message corresponding to the random access preamble in the RAR window. The first window includes at least two or more random access opportunities. The random access opportunities within the first window may be associated with the same SSB.

[0193] It can also be understood that the first window may be within a correlation period, that is, the start time of the first window is later than or equal to the start time of the correlation period, and the end time of the first window is earlier than or equal to the end time of the correlation period.

[0194] Optionally, the random access opportunity within the first window is a SSB-associated random access opportunity.

[0195] Specifically, the first window may be all or part of the random access opportunities associated with the SSB.

[0196] Optionally, in order to identify the same terminal, the random access preambles sent by the terminal in the first window may be the same, so that the network device can regard the received identical random access preambles as coming from the same terminal. The terminal may send random access preambles on all or part of the ROs of the corresponding SSB, and all or part of the ROs are all or part of the ROs associated with the SSB. In order to identify the random access preambles sent by the same terminal on different ROs, the terminal sends the same random access preamble on multiple ROs or the random access preambles on multiple ROs have a certain correlation. For example, random access preamble 1 has a certain correlation with random access preamble 2, and the correlation can be defined using a formula or directly specified, such as by configuration information. The multiple ROs may be random access opportunities associated with an SSB.

[0197] 702, the terminal receives one or more random access response messages of the random access preamble from the network device. Accordingly, the network device sends one or more random access response messages of the random access preamble to the terminal.

[0198] Specifically, for the RAR of a terminal, the network device can only select one RAR window in multiple ROs to send the RAR. The terminal detects the RAR in multiple RAR windows and stops detecting after detecting the corresponding preamble index. The RARs of multiple ROs can have multiple RA-RNTIs or use a common RA-RNTI. When there are multiple RA-RNTIs, the terminal detects multiple RA-RNTIs, each RO can correspond to one RA-RNTI, or K ROs can correspond to one RNTI, and the value of K can be any one or more of 1, 2, 3, 4, 5, 6, 7, and 8.

[0199] It can be understood that the RA-RNTI can be generated according to the time-frequency resource position of the first RO, or according to the time-frequency resource position of any RO in the middle. The RAR-windows of multiple ROs have the same duration, each RO can correspond to one RAR-window, and the terminal can detect the corresponding RA-RNTI in multiple RAR-windows. The RAR-window is also redefined, that is, the random access preambles transmitted by M ROs correspond to the same RAR-window, so its starting position can be the starting position of the RAR-window of the first RO as the starting position of the entire RAR window. In addition, the duration of the RAR-window can be the duration from the starting position of the RAR-window of the first RO to the end position of the RAR window of the last RO. Among them, the gap can be removed in the middle, and the gap means that the RARwindow of each RO does not cover the time area. The value of M can be any one or more of 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16. The value of K may be the same as the value of M, for example, both values ​​are the number of random access opportunities associated with one SSB.

[0200] Optionally, the network device may receive one or more random access preambles and feed back a random access response message to the terminal. The one or more random access response messages may be scrambled by the first RNTI. That is, if there are multiple random access response messages, the multiple random access response messages are scrambled by the same RNTI, thereby reducing the signaling overhead of the scrambled random access response message.

[0201] Optionally, the network device may feed back multiple random access response messages to the terminal within a RAR window. The RNTI for scrambling the multiple random access response messages may be determined according to the random access timing when the random access preamble is sent. That is, the random access timing and the RNTI have a mapping relationship, and the RNTI for scrambling the first random access response message by the network device has a mapping relationship with the random access timing of the first random access preamble corresponding to the first random access response message. In this way, the terminal can identify the random access response messages corresponding to different random access preambles, thereby improving the flexibility of random access preamble transmission.

[0202] Optionally, the terminal can receive a random access response message associated with the random access preamble within a first RAR window, the starting position of the first window being the starting position of the random access response window associated with the first random access opportunity among the at least two random access opportunities, and the ending position of the first RAR window being the ending position of the random access response window associated with the last random access opportunity among the at least two random access opportunities.

[0203] Specifically, the first RAR window may be a random access response (RAR) window. In a scenario where the terminal sends a random access preamble in at least two random access opportunities, the RAR window may be flexibly set. The random access response window associated with the random access opportunity may be a receiving window for a random access response message corresponding to the random access preamble sent at the random access opportunity. For example, Figure 6 As shown, if the SSB is associated with RO1-RO8, and the terminal sends a random access preamble on RO1 and RO8, the first RAR window can be set to be from the start time of the random access response window corresponding to RO1 to the end time of the random access response window corresponding to RO8. The terminal can receive a random access response message within the RAR window.

[0204] It can be understood that the first RAR window may also include only one RO-associated random access response window.

[0205] It can also be understood that the specific values ​​of the at least two random access opportunities can be any one of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, and 16.

[0206] The various embodiments described herein may be independent solutions or may be combined according to internal logic, and all of these solutions fall within the protection scope of this application.

[0207] It can be understood that in the above-mentioned method embodiments, the methods and operations implemented by the terminal can also be implemented by components that can be used for the terminal (such as chips or circuits), and the methods and operations implemented by the access network device can also be implemented by components that can be used for the access network device (such as chips or circuits).

[0208] The above mainly introduces the scheme provided by the embodiments of the present application from the perspective of various interactions. It can be understood that each network element, such as a transmitting device or a receiving device, includes a hardware structure and / or software module corresponding to each function in order to implement the above functions. Those skilled in the art should be aware that, in combination with the units and algorithm steps of each example described in the embodiments disclosed in this document, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in hardware or in a computer software-driven hardware manner depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0209] The embodiment of the present application can divide the functional modules of the transmitting end device or the receiving end device according to the above method example. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. There may be other division methods in actual implementation. The following is an example of using each functional module divided according to each function to illustrate.

[0210] It should be understood that the specific examples in the embodiments of the present application are only intended to help those skilled in the art to better understand the embodiments of the present application, rather than to limit the scope of the embodiments of the present application.

[0211] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0212] Above, combined Figures 4 to 7 The method provided by the embodiment of the present application is described in detail. Figures 8 to 15 The device provided in the embodiment of the present application is described in detail. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment, so the contents not described in detail can be referred to the method embodiment above, and for the sake of brevity, they will not be repeated here.

[0213] Figure 8A schematic block diagram of an apparatus 800 for transmitting a random access preamble according to an embodiment of the present application is shown.

[0214] It should be understood that the device 800 may correspond to Figure 1 Each terminal or chip in a terminal shown, and Figure 4 The terminal or the chip in the terminal in the embodiment shown may have Figure 4 Any function of the terminal in the method embodiment shown. The device 800 includes a transceiver module 810, which may specifically include a receiving module and a sending module.

[0215] The receiving module is used to receive indication information, where the indication information is used to indicate whether a first path loss is the same as a second path loss, where the first path loss is a path loss used to transmit a random access preamble, and the second path loss is a path loss used to transmit a synchronization signal block SSB;

[0216] The sending module is used to send the random access preamble, where the random access preamble is used for a terminal to perform random access, and the transmission power of the random access preamble is associated with the first path loss, where the first path loss is determined by the indication information and the second path loss.

[0217] Optionally, the indication information includes a repeated field or a non-repeated field, the repeated field is used to indicate that the first path loss is the same as the second path loss, and the non-repeated field is used to indicate that the first path loss is different from the second path loss.

[0218] Optionally, when the indication information indicates that the first path loss is different from the second path loss, the indication information further includes a path loss difference between the first path loss and the second path loss, and the first path loss is determined by the path loss difference and the second path loss.

[0219] Specifically, the device 800 further includes a processing module 820, and the processing module 820 is used to determine the first path loss according to the path loss difference and the second path loss.

[0220] Optionally, the SSB is associated with at least two random access opportunities, wherein the sending module is specifically used to: send the random access preamble at at least one random access opportunity among the at least two random access opportunities.

[0221] Optionally, the receiving module is further used to receive one or more random access response messages associated with the random access preamble, and the one or more random access response messages are scrambled by the first radio network temporary identifier RNTI.

[0222] Optionally, the receiving module is also used to receive a random access response message of the random access preamble in a first window, the starting position of the first window being the starting position of the random access response window associated with the first random access opportunity among the at least two random access opportunities, and the ending position of the first window being the ending position of the random access response window associated with the last random access opportunity among the at least two random access opportunities.

[0223] Optionally, the receiving module is also used to receive one or more random access response messages associated with the random access preamble, wherein a first random access response message among the one or more random access response messages is encrypted with the RNTI corresponding to a first random access opportunity among the at least two random access opportunities, wherein the first random access response message is used to respond to a random access preamble transmitted through the first random access opportunity.

[0224] For a more detailed description of the transceiver module 810 and the processing module 820, please refer to the relevant description in the above method embodiment, which will not be described again here.

[0225] Fig. 9 The communication device 900 provided in the embodiment of the present application is shown. The device 900 can be Figure 3 The device can be used as follows Fig. 9 The hardware architecture shown in FIG. 1 is a schematic diagram of a device for displaying a processor 910 and a transceiver 930. Optionally, the device may further include a memory 940. The processor 910, the transceiver 930 and the memory 940 communicate with each other via an internal connection path. Figure 8 The related functions implemented by the processing module 820 in the embodiment can be implemented by the processor 910, and the related functions implemented by the transceiver module 810 can be implemented by the processor 910 controlling the transceiver 930.

[0226] Optionally, the processor 910 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), a dedicated processor, or one or more integrated circuits for executing the technical solutions of the embodiments of the present application. Alternatively, the processor may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions). For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processing unit may be used to control a communication device (e.g., a base station, a terminal, or a chip, etc.), execute a software program, and process data of the software program.

[0227] Optionally, the processor 910 may include one or more processors, for example, one or more central processing units (CPUs). When the processor is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

[0228] The transceiver 930 is used to send and receive data and / or signals, and receive data and / or signals. The transceiver may include a transmitter and a receiver, the transmitter is used to send data and / or signals, and the receiver is used to receive data and / or signals.

[0229] The memory 940 includes but is not limited to random access memory (RAM), read-only memory (ROM), erasable programmable readonly memory (EPROM), and compact disc read-only memory (CD-ROM). The memory 940 is used to store relevant instructions and data.

[0230] The memory 940 is used to store program codes and data of the terminal, and may be a separate device or integrated in the processor 910 .

[0231] Specifically, the processor 910 is used to control the transceiver to transmit information with the terminal. For details, please refer to the description in the method embodiment, which will not be repeated here.

[0232] In a specific implementation, as an embodiment, the device 900 may also include an output device and an input device. The output device communicates with the processor 910 and can display information in a variety of ways. For example, the output device may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. The input device communicates with the processor 910 and can receive user input in a variety of ways. For example, the input device may be a mouse, a keyboard, a touch screen device, or a sensor device.

[0233] Understandably, Fig. 9 Only a simplified design of the communication device is shown. In practical applications, the device may also include other necessary components, including but not limited to any number of transceivers, processors, controllers, memories, etc., and all terminals that can implement the present application are within the protection scope of the present application.

[0234] In a possible design, the device 900 may be a chip, for example, a communication chip that can be used in a terminal, and is used to implement the relevant functions of the processor 910 in the terminal. The chip may be a field programmable gate array, a dedicated integrated chip, a system chip, a central processing unit, a network processor, a digital signal processing circuit, a microcontroller, and a programmable controller or other integrated chip for implementing the relevant functions. The chip may optionally include one or more memories for storing program codes, and when the codes are executed, the processor implements the corresponding functions.

[0235] The embodiment of the present application also provides a device, which can be a terminal or a circuit. The device can be used to execute the action executed by the terminal in the above method embodiment.

[0236] Fig.10 A schematic block diagram of an apparatus 1000 for transmitting a random access preamble according to an embodiment of the present application is shown.

[0237] It should be understood that the device 1000 may correspond to Figure 1 The network device or chip in the network device shown, or Figure 4 The network device or the chip in the network device in the embodiment shown may have any function of the network device in the method. The apparatus 1000 includes a transceiver module 1010, which includes a receiving module and a sending module.

[0238] The sending module is used to send indication information, where the indication information is used to indicate whether a first path loss is the same as a second path loss, where the first path loss is a path loss used to transmit a random access preamble, and the second path loss is a path loss used to transmit a synchronization signal block SSB;

[0239] The receiving module is used to receive the random access preamble sent by the terminal, the random access preamble is used for the terminal to perform random access, the transmission power of the random access preamble is associated with the first path loss, and the first path loss is determined by the indication information and the second path loss.

[0240] Optionally, the device 1000 may further include a determination module 1020, which may be configured to determine the indication information.

[0241] Optionally, the indication information includes a repeated field or a non-repeated field, the repeated field is used to indicate that the first path loss is the same as the second path loss, and the non-repeated field is used to indicate that the first path loss is different from the second path loss.

[0242] Optionally, when the indication information indicates that the first beam is different from the second beam, the indication information further includes a path loss difference between the first path loss and the second path loss.

[0243] Optionally, the SSB is associated with at least two random access opportunities, and the receiving module is specifically configured to:

[0244] The random access preamble is received at at least one random access opportunity of the at least two random access opportunities.

[0245] Optionally, the sending module is further used to send one or more random access response messages associated with the random access preamble, and the one or more random access response messages are scrambled by the first RNTI.

[0246] Optionally, the sending module is also used to send one or more random access response messages associated with the random access preamble, wherein the first random access response message among the one or more random access response messages is scrambled by the RNTI corresponding to the first random access opportunity among the at least two random access opportunities, wherein the first random access response message is used to respond to the random access preamble transmitted through the first random access opportunity.

[0247] For a more detailed description of the transceiver module 1010 and the processing module 1020 , please refer to the relevant description in the above method embodiment, which will not be described again here.

[0248] Fig.11 The communication device 1100 provided in the embodiment of the present application is shown. The device 1100 can be Figure 4 The network device described in. The device can be used as Fig.11 The hardware architecture shown in FIG. 1 may include a processor 1110 and a transceiver 1120 , and optionally, the device may further include a memory 1130 , wherein the processor 1110 , the transceiver 1120 and the memory 1130 communicate with each other via an internal connection path. Fig.10 The related functions implemented by the processing module 1020 in the embodiment can be implemented by the processor 1110 , and the related functions implemented by the transceiver module 1010 can be implemented by the processor 1110 controlling the transceiver 1120 .

[0249] Optionally, processor 1110 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), a dedicated processor, or one or more integrated circuits for executing the technical solutions of the embodiments of the present application. Alternatively, a processor may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions). For example, it may be a baseband processor or a central processing unit. A baseband processor may be used to process communication protocols and communication data, and a central processing unit may be used to control a communication device (e.g., a base station, a terminal, or a chip), execute a software program, and process data of a software program.

[0250] Optionally, the processor 1110 may include one or more processors, for example, one or more central processing units (CPUs). When the processor is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

[0251] The transceiver 1120 is used to send and receive data and / or signals, and receive data and / or signals. The transceiver may include a transmitter and a receiver, the transmitter is used to send data and / or signals, and the receiver is used to receive data and / or signals.

[0252] The memory 1130 includes but is not limited to random access memory (RAM), read-only memory (ROM), erasable programmable readonly memory (EPROM), and compact disc read-only memory (CD-ROM). The memory 1130 is used to store relevant instructions and data.

[0253] The memory 1130 is used to store program codes and data of the network device, and may be a separate device or integrated in the processor 1110 .

[0254] Specifically, the processor 1110 is used to control the transceiver to transmit information with the terminal. For details, please refer to the description in the method embodiment, which will not be repeated here.

[0255] In a specific implementation, as an embodiment, the device 1100 may also include an output device and an input device. The output device communicates with the processor 1110 and can display information in a variety of ways. For example, the output device may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. The input device communicates with the processor 1110 and can receive user input in a variety of ways. For example, the input device may be a mouse, a keyboard, a touch screen device, or a sensor device.

[0256] Understandably, Fig.11 Only a simplified design of the communication device is shown. In practical applications, the device may also include other necessary components, including but not limited to any number of transceivers, processors, controllers, memories, etc., and all network devices that can implement the present application are within the protection scope of the present application.

[0257] In a possible design, the device 1100 may be a chip, for example, a communication chip that can be used in a network device, and is used to implement the relevant functions of the processor 1110 in the network device. The chip may be a field programmable gate array, a dedicated integrated chip, a system chip, a central processing unit, a network processor, a digital signal processing circuit, a microcontroller, or a programmable controller or other integrated chips that implement the relevant functions. The chip may optionally include one or more memories for storing program codes, and when the codes are executed, the processor implements the corresponding functions.

[0258] The embodiment of the present application also provides a device, which can be a network device or a circuit. The device can be used to execute the actions executed by the network device in the above method embodiment.

[0259] Optionally, when the device in this embodiment is a terminal, Fig.12 A simplified schematic diagram of the terminal structure is shown. For ease of understanding and illustration, Fig.12 In the example, a mobile phone is used as a terminal. Fig.12As shown, the terminal includes a processor, a memory, a radio frequency circuit, an antenna, and an input-output device. The processor is mainly used to process communication protocols and communication data, as well as to control the terminal, execute software programs, process software program data, etc. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for conversion between baseband signals and radio frequency signals and processing of radio frequency signals. The antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input-output devices, such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of terminals may not have input-output devices.

[0260] When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs the baseband signal to the RF circuit. The RF circuit performs RF processing on the baseband signal and then sends the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the terminal, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data. For ease of explanation, Fig.12 Only one memory and processor are shown. In an actual terminal product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device. The memory may be set independently of the processor or may be integrated with the processor, which is not limited in the embodiments of the present application.

[0261] In the embodiments of the present application, the antenna and the radio frequency circuit having transceiver functions may be regarded as the transceiver unit of the terminal, and the processor having the processing function may be regarded as the processing unit of the terminal. Fig.12 As shown, the terminal includes a transceiver unit 1210 and a processing unit 1220. The transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver device, etc. The processing unit may also be referred to as a processor, a processing board, a processing module, a processing device, etc. Optionally, the device used to implement the receiving function in the transceiver unit 1210 may be regarded as a receiving unit, and the device used to implement the sending function in the transceiver unit 1210 may be regarded as a sending unit, that is, the transceiver unit 1210 includes a receiving unit and a sending unit. The transceiver unit may sometimes be referred to as a transceiver, a transceiver, or a transceiver circuit, etc. The receiving unit may sometimes be referred to as a receiver, a receiver, or a receiving circuit, etc. The sending unit may sometimes be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0262] It should be understood that the transceiver unit 1210 is used to perform sending operations and receiving operations on the terminal side in the above method embodiment, and the processing unit 1220 is used to perform other operations on the terminal except the sending and receiving operations in the above method embodiment.

[0263] For example, in one implementation, the processing unit 1220 is used to execute Figure 4 The transceiver unit 1210 is used to perform Figure 4 The transceiver unit 1210 is also used to perform the transceiver operations in steps 401 and 402 in the embodiment of the present application, and / or the transceiver unit 1210 is also used to perform other transceiver steps on the terminal side.

[0264] When the device is a chip, the chip includes a transceiver unit and a processing unit, wherein the transceiver unit may be an input / output circuit or a communication interface; and the processing unit may be a processor or a microprocessor or an integrated circuit integrated on the chip.

[0265] Optionally, when the device is a terminal, reference may also be made to Fig.13 As an example, the device can perform similar Fig. 9 The functions of the processor 910. Fig.13 In the apparatus, the apparatus includes a processor 1301, a sending data processor 1303, and a receiving data processor 1305. Figure 8 The processing module 820 in the illustrated embodiment may be Fig.13 The processor 1301 in the embodiment of the present invention performs the corresponding functions. Figure 8 The transceiver module 810 in the illustrated embodiment may be Fig.13 The sending data processor 1303 and the receiving data processor 1305 in the embodiment of the present invention. Fig.13 A channel encoder and a channel decoder are shown in the figure, but it can be understood that these modules do not constitute a restrictive description of this embodiment and are only illustrative.

[0266] Fig.14 Another form of this embodiment is shown. The processing device 1400 includes modules such as a modulation subsystem, a central processing subsystem, and a peripheral subsystem. The communication device in this embodiment can serve as the modulation subsystem therein. Specifically, the modulation subsystem may include a processor 1403 and an interface 1404. The processor 1403 performs the functions of the above-mentioned processing module 820, and the interface 1404 performs the functions of the above-mentioned transceiver module 810. As another variation, the modulation subsystem includes a memory 1406, a processor 1403, and a program stored in the memory and executable on the processor, and the processor implements the method described in the embodiment when executing the program. It should be noted that the memory 1406 may be non-volatile or volatile, and its location may be located inside the modulation subsystem or in the processing device 1400, as long as the memory 1406 can be connected to the processor 1403.

[0267] When the device in this embodiment is a network device, the network device can be as follows Fig.15As shown, for example, the device 150 is a base station. The base station can be applied to Figure 1 In the system shown, the functions of the network device in the above method embodiment are performed. The base station 150 may include one or more DUs 1501 and one or more CUs 1502. CU1502 may communicate with the next generation core network (NGcore, NC). The DU 1501 may include at least one antenna 15011, at least one radio unit 15012, at least one processor 15013 and at least one memory 15014. The DU 1501 part is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals to baseband signals, as well as part of baseband processing. CU1502 may include at least one processor 15022 and at least one memory 15021. CU1502 and DU1501 may communicate through an interface, wherein the control plane interface may be Fs-C, such as F1-C, and the user plane interface may be Fs-U, such as F1-U.

[0268] The CU 1502 part is mainly used for baseband processing, controlling the base station, etc. The DU 1501 and CU1502 can be physically set together or physically separated, that is, a distributed base station. The CU 1502 is the control center of the base station, which can also be called a processing unit, and is mainly used to complete the baseband processing function. For example, the CU 1502 can be used to control the base station to execute the operation process of the network device in the above method embodiment.

[0269] Specifically, the baseband processing on the CU and DU can be divided according to the protocol layer of the wireless network, for example, the functions of the packet data convergence protocol (PDCP) layer and above are set in the CU, and the functions of the protocol layers below the PDCP, such as the radio link control (RLC) layer and the medium access control (MAC) layer, are set in the DU. For another example, the CU implements the functions of the radio resource control (RRC) and the packet data convergence protocol (PDCP) layer, and the DU implements the functions of the radio link control (RLC), MAC and physical (PHY) layers.

[0270] In addition, optionally, the base station 150 may include one or more remote units (RU), one or more DUs and one or more CUs. The DU may include at least one processor 15013 and at least one memory 15014, the RU may include at least one antenna 15011 and at least one RF unit 15012, and the CU may include at least one processor 15022 and at least one memory 15021.

[0271] For example, in one implementation, the processor 15013 is used to execute Figure 4 The processing steps on the network device side. The radio unit 15012 is used to perform Figure 4 The sending and receiving operations in steps 401 and 402 in .

[0272] In one example, the CU1502 may be composed of one or more boards, and the multiple boards may jointly support a wireless access network (such as a 5G network) with a single access indication, or may respectively support wireless access networks with different access standards (such as an LTE network, a 5G network, or other networks). The memory 15021 and the processor 15022 may serve one or more boards. In other words, a memory and a processor may be separately set on each board. It may also be that multiple boards share the same memory and processor. In addition, necessary circuits may be set on each board. The DU1501 may be composed of one or more boards, and the multiple boards may jointly support a wireless access network (such as a 5G network) with a single access indication, or may respectively support wireless access networks with different access standards (such as an LTE network, a 5G network, or other networks). The memory 15014 and the processor 15013 may serve one or more boards. In other words, a memory and a processor may be separately set on each board. It may also be that multiple boards share the same memory and processor. In addition, necessary circuits may also be set on each board.

[0273] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0274] It should be understood that the processor can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit in the processor or the instruction in the form of software. The above processor can be a general processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), a field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor can be combined to perform. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0275] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0276] In the present application, "at least one" means one or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0277] It should be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present invention, the size of the sequence number of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0278] The terms "component", "module", "system", etc. used in this specification are used to represent computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program and / or a computer. By way of illustration, both applications running on a computing device and a computing device can be components. One or more components may reside in a process and / or an execution thread, and a component may be located on a computer and / or distributed between two or more computers. In addition, these components may be executed from various computer-readable media having various data structures stored thereon. Components may, for example, communicate through local and / or remote processes according to signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system and / or a network, such as the Internet interacting with other systems through signals).

[0279] It should also be understood that the first, second and various numerical numbers involved in this document are only distinguished for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0280] It should be understood that the term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. Among them, the existence of A or B alone does not limit the number of A or B. Taking the existence of A alone as an example, it can be understood that there are one or more A.

[0281] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0282] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0283] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0284] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0285] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0286] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks or optical disks.

[0287] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for transmitting a random access preamble, characterized in that: include: receiving indication information, where the indication information is used to indicate a difference; A random access preamble is sent, wherein the sending power of the random access preamble is determined based on the difference, the expected receiving power, the path loss for transmitting the synchronization signal block SSB, and the maximum power of the terminal sending the signal.

2. A method for transmitting a random access preamble, characterized in that: include: Sending indication information, where the indication information is used to indicate the difference; A random access preamble sent by a receiving terminal, wherein the transmission power of the random access preamble is determined based on the difference, the expected receiving power, the path loss for transmitting the synchronization signal block SSB, and the maximum power of the terminal sending the signal.

3. The method according to claim 1 or 2, characterized in that: The spatial domain filter of the SSB is different from the receive beam of the random access preamble.

4. The method according to claim 1 or 2, characterized in that: The difference is the difference between the path loss of the transmitted SSB and the path loss of the transmitted random access preamble, or the beam gain difference between the spatial domain filter of the SSB and the receiving beam of the random access preamble.

5. The method according to claim 1 or 2, characterized in that: The difference value is one of a plurality of difference values, the plurality of difference values ​​are predefined, or the plurality of difference values ​​are configured by the network device; or The difference is any of the following: 1dB, 2dB, 3dB, 4dB, 5dB, 6dB, 7dB, 8dB, 9dB, 10dB, 11dB, 12dB, 13dB, 14dB, 15dB, 16dB, 17dB, 18dB, 19dB, 20dB; or -1dB,-2dB,-3dB,-4dB,-5dB,-6dB,-7dB,-8dB,-9dB,-10dB,-11dB,-12dB,-13dB,-14dB,-15dB,-16dB,-17dB,-18dB,-19dB,-20dB.

6. The method according to any one of claims 1 to 5, characterized in that The transmission power of the random access preamble satisfies: P PRACH,b,f,c (i)=min{P CMAX,f,c (i),(P PRACH,target,f,c +PL b,f,c +G offset )} Among them, P PRACH,b,f,c (i) The transmit power of the random access preamble, P CMAX,f,c (i) is the maximum power of the signal sent by the terminal, P PRACH,target,f,c is the expected received power; PL b,f,c is the path loss for transmitting the synchronization signal block SSB, G offset is the difference.

7. The method according to any one of claims 1, 3 to 6, characterized in that: The SSB is associated with at least two random access opportunities, wherein the sending of the random access preamble includes: The random access preamble is transmitted in at least one random access opportunity among the at least two random access opportunities.

8. The method according to any one of claims 2 to 6, characterized in that The SSB is associated with at least two random access opportunities, and the receiving the random access preamble includes: The random access preamble is received at at least one random access opportunity of the at least two random access opportunities.

9. A communication device, characterized in that: include: A processor, when the processor executes the computer program in the memory, the method according to any one of claims 1, 3 to 7 or the method according to any one of claims 2 to 6, 8 is executed.

10. A computer program product, characterized in that The computer program product comprises a computer program or instructions, and when the computer program or instructions are run on a computer, the computer is caused to execute the method according to any one of claims 1, 3 to 7 or the method according to any one of claims 2 to 6 and 8.

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