Communication method, communication system and storage medium

Abstract

The present disclosure proposes a communication method, device and storage medium, the method being executed by a terminal, the method comprising: receiving first information sent by a network device, the first information being used for configuring a physical random access channel (PRACH); and determining, based on the first information, a transmission power used for transmitting the PRACH on a first time domain unit, the first time domain unit including a sub-band full duplex SBFD symbol and a non-SBFD symbol. The sending power used for sending the PRACH on the first time domain unit can be determined according to the first information, and differential configuration is carried out on the sending power used on different symbols.

Description

Communication method, communication system and storage medium Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a communication method, a communication system, and a storage medium. Background Art

[0002] In the field of communications technology, a subband full-duplex (SBFD) symbol includes both a downlink (DL) subband and an uplink (UL) subband in the frequency domain, and a physical random access channel (PRACH) can be used to implement random access.

[0003] Summary of the Invention

[0004] The present disclosure provides a communication method, a communication device, a communication system, and a storage medium.

[0005] According to a first aspect of an embodiment of the present disclosure, a communication method is proposed, which is executed by a terminal. The method includes: receiving first information sent by a network device, the first information being used to configure a physical random access channel (PRACH); based on the first information, determining the transmission power used to send the PRACH on a first time domain unit, the first time domain unit including a sub-band full-duplex SBFD symbol and a non-SBFD symbol.

[0006] In the above method, the transmit power used to transmit the PRACH in the first time domain unit may be determined according to the first information.

[0007] According to a second aspect of an embodiment of the present disclosure, a communication method is proposed, which is executed by a network device. The method includes: sending first information to a terminal, where the first information is used to configure a physical random access channel (PRACH); based on the first information, determining the transmission power used to send the PRACH on a first time domain unit, where the first time domain unit includes a sub-band full-duplex SBFD symbol and a non-SBFD symbol.

[0008] In the above method, the transmit power used to transmit the PRACH in the first time domain unit may be determined according to the first information.

[0009] According to a third aspect of an embodiment of the present disclosure, a terminal is proposed, including a transceiver module for receiving first information sent by a network device, the first information being used to configure a physical random access channel (PRACH); a processing module for determining, based on the first information, a transmit power used to send the PRACH on a first time domain unit, the first time domain unit including a sub-band full-duplex SBFD symbol and a non-SBFD symbol.

[0010] According to a fourth aspect of an embodiment of the present disclosure, a network device is proposed, including a transceiver module for sending first information to a terminal, the first information being used to configure a physical random access channel (PRACH); a processing module for determining, based on the first information, a transmit power used to send the PRACH on a first time domain unit, the first time domain unit including a sub-band full-duplex SBFD symbol and a non-SBFD symbol.

[0011] According to the fifth aspect of an embodiment of the present disclosure, a communication device is proposed, which includes: one or more processors; wherein the one or more processors are used to call instructions so that the communication device executes a method as described in any one of the first aspects of the present disclosure, or is used to execute a method as described in any one of the second aspects of the present disclosure.

[0012] According to a sixth aspect of an embodiment of the present disclosure, a communication system is proposed, including a terminal and a network device, wherein the terminal is configured to implement the method of the first aspect, and the network device is configured to implement the method of the second aspect.

[0013] According to a seventh aspect of an embodiment of the present disclosure, a storage medium is proposed, which stores instructions. When the instructions are executed on a communication device, the communication device executes the method of any one of the first and second aspects.

[0014] According to an eighth aspect of the embodiments of the present disclosure, a computer program product is proposed, characterized in that it includes a computer program, and when the computer program is executed by a processor, it implements the method of any one of the embodiments of the first and second aspects of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0016] FIG1 is a schematic diagram of the architecture of some communication systems provided by embodiments of the present disclosure;

[0017] FIG2 is an interactive diagram of a communication method provided by an embodiment of the present disclosure;

[0018] FIG3 is a flow chart of some communication methods provided by embodiments of the present disclosure;

[0019] FIG4 is a flow chart of other communication methods provided by embodiments of the present disclosure;

[0020] FIG5 is a flow chart of other communication methods provided by embodiments of the present disclosure;

[0021] FIG6 is a flow chart of a method for determining PRACH transmission power provided in an embodiment of the present disclosure.

[0022] FIG7a is a schematic structural diagram of a terminal provided by an embodiment of the present disclosure;

[0023] FIG7b is a schematic structural diagram of a network device provided by an embodiment of the present disclosure;

[0024] FIG8a is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure;

[0025] FIG8 b is a schematic structural diagram of a chip provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0026] The embodiments of the present disclosure provide a communication method, a communication device, a communication system, and a storage medium.

[0027] In the first aspect, an embodiment of the present disclosure proposes a communication method, which is executed by a terminal, and the method includes: receiving first information sent by a network device, the first information being used to configure a physical random access channel PRACH; based on the first information, determining the transmission power used to send the PRACH on a first time domain unit, the first time domain unit including a sub-band full-duplex SBFD symbol and a non-SBFD symbol.

[0028] In the above embodiment, the transmit power used to transmit the PRACH in the first time domain unit may be determined according to the first information.

[0029] In combination with some embodiments of the first aspect, in some embodiments, the first information includes a first parameter and a second parameter, the first parameter is used to identify the expected value of the target received power for sending PRACH, and the second parameter is used to identify the power ramp step for sending PRACH.

[0030] In the above embodiment, the first parameter and the second parameter may be determined according to the first information, so as to determine the transmit power used to transmit the PRACH on the first time domain unit according to the first parameter and the second parameter.

[0031] In combination with some embodiments of the first aspect, in some embodiments, determining the transmit power used to send PRACH on the first time domain unit based on the first information includes: determining at least one of a third parameter, a fourth parameter, a fifth parameter, a sixth parameter, a seventh parameter, and an eighth parameter, the third parameter being used to identify the number of times PRACH is sent on the first time domain unit in 2-step RA and / or 4-step RA, the fourth parameter being used to identify the power offset value related to the preamble code format, the fifth parameter being used to identify the power offset value for switching from 2-step access to 4-step access, the sixth parameter being used to identify the maximum transmit power of the terminal, the seventh parameter being used to identify the path loss of the terminal, and the eighth parameter being used to identify the difference between the transmit power used to send PRACH on SBFD symbols and the transmit power used to send PRACH on non-SBFD symbols; determining, based on the first parameter, the second parameter, the third parameter, the fourth parameter, and the fifth parameter, respectively, the actual value of the target receive power for sending PRACH on SBFD symbols and non-SBFD symbols in 2-step RA and / or 4-step RA; and determining, based on the actual value of the target receive power, the sixth parameter, the seventh parameter, and / or the eighth parameter, the transmit power used to send PRACH on the first time domain unit.

[0032] In the above embodiment, the transmit power used to transmit the PRACH in the first time domain unit may be determined by determining various parameters.

[0033] In combination with some embodiments of the first aspect, in some embodiments, in 2-step random access RA and / or 4-step RA, at least one of the first parameter and the second parameter on the SBFD symbol and the non-SBFD symbol is different.

[0034] In the above embodiment, it is possible to implement differential configuration of parameters of SBFD symbols and non-SBFD symbols, thereby achieving different transmission powers for SBFD symbols and non-SBFD symbols.

[0035] In combination with some embodiments of the first aspect, in some embodiments, the first parameter includes at least one of the following: in 2-step RA, the expected value of the first target received power of PRACH sent on SBFD symbols; in 2-step RA, the expected value of the second target received power of PRACH sent on non-SBFD symbols; in 4-step RA, the expected value of the third target received power of PRACH sent on SBFD symbols; in 4-step RA, the expected value of the fourth target received power of PRACH sent on non-SBFD symbols; the second parameter includes at least one of the following: in 2-step RA, the first power ramping step size of PRACH sent on SBFD symbols; in 2-step RA, the second power ramping step size of PRACH sent on non-SBFD symbols step size; in 4-step RA, the third power ramping step size for sending PRACH on SBFD symbols; in 4-step RA, the fourth power ramping step size for sending PRACH on non-SBFD symbols; the third parameter includes a first count and a second count, the first count is the total number of times PRACH is sent on SBFD symbols and non-SBFD symbols in 2-step RA, and the second count is the total number of times PRACH is sent on SBFD symbols and non-SBFD symbols in 4-step RA; the fifth parameter includes a first offset and a second offset, the first offset is the power offset value for sending PRACH on SBFD symbols when switching from 2-step RA to 4-step RA, and the second offset is the power offset value for sending PRACH on non-SBFD symbols when switching from 2-step RA to 4-step RA.

[0036] In the above embodiment, the transmit power used to transmit the PRACH in the first time domain unit may be determined by determining various parameters.

[0037] In combination with some embodiments of the first aspect, in some embodiments, determining the actual value of the target received power for sending PRACH on SBFD symbols and non-SBFD symbols in 2-step RA and / or 4-step RA based on the first parameter, the second parameter, the third parameter, the fourth parameter, and the fifth parameter, respectively, includes: determining the actual value of the target received power for sending PRACH on SBFD symbols in 2-step RA based on the expected value of the first target received power, the first power ramping step, the first count, and the fourth parameter; determining the actual value of the target received power for sending PRACH on non-SBFD symbols in 2-step RA based on the expected value of the second target received power, the second power ramping step, the first count, and the fourth parameter; determining the actual value of the target received power for sending PRACH on SBFD symbols in 4-step RA based on the expected value of the third target received power, the third power ramping step, the second count, the fourth parameter, and the first offset; determining the actual value of the target received power for sending PRACH on non-SBFD symbols in 4-step RA based on the expected value of the fourth target received power, the fourth power ramping step, the second count, the fourth parameter, and the second offset.

[0038] In the above embodiment, the number of times the PRACH is transmitted in the SBFD symbol and the non-SBFD symbol may be jointly counted.

[0039] In combination with some embodiments of the first aspect, in some embodiments, the first parameter includes at least one of the following: in 2-step RA, the expected value of the first target received power of PRACH sent on SBFD symbols; in 2-step RA, the expected value of the second target received power of PRACH sent on non-SBFD symbols; in 4-step RA, the expected value of the third target received power of PRACH sent on SBFD symbols; in 4-step RA, the expected value of the fourth target received power of PRACH sent on non-SBFD symbols; the second parameter includes at least one of the following: in 2-step RA, the first power ramping step size of PRACH sent on SBFD symbols; in 2-step RA, the second power ramping step size of PRACH sent on non-SBFD symbols; in 4-step RA, the first power ramping step size of PRACH sent on SBFD symbols. Three power ramping steps; in 4-step RA, the fourth power ramping step for sending PRACH on non-SBFD symbols; the third parameter includes a third count, a fourth count, a fifth count, and a sixth count, the third count being the number of times PRACH is sent on SBFD symbols in 2-step RA, the fourth count being the number of times PRACH is sent on non-SBFD symbols in 2-step RA, the fifth count being the number of times PRACH is sent on SBFD symbols in 4-step RA, and the sixth count being the number of times PRACH is sent on non-SBFD symbols in 4-step RA; the fifth parameter includes a first offset and a second offset, the first offset being the power offset value for sending PRACH on SBFD symbols when switching from 2-step RA to 4-step RA, and the second offset being the power offset value for sending PRACH on non-SBFD symbols when switching from 2-step RA to 4-step RA.

[0040] In the above embodiment, the transmit power used to transmit the PRACH in the first time domain unit may be determined by determining various parameters.

[0041] In combination with some embodiments of the first aspect, in some embodiments, determining the actual value of the target received power for sending PRACH on SBFD symbols and non-SBFD symbols in 2-step RA and / or 4-step RA based on the first parameter, the second parameter, the third parameter, the fourth parameter, and the fifth parameter, respectively, includes: determining the actual value of the target received power for sending PRACH on SBFD symbols in 2-step RA based on the expected value of the first target received power, the first power ramping step, the third count, and the fourth parameter; determining the actual value of the target received power for sending PRACH on non-SBFD symbols in 2-step RA based on the expected value of the second target received power, the second power ramping step, the fourth count, and the fourth parameter; determining the actual value of the target received power for sending PRACH on SBFD symbols in 4-step RA based on the expected value of the third target received power, the third power ramping step, the fifth count, the fourth parameter, and the first offset; determining the actual value of the target received power for sending PRACH on non-SBFD symbols in 4-step RA based on the expected value of the fourth target received power, the fourth power ramping step, the sixth count, the fourth parameter, and the second offset.

[0042] In the above embodiment, the number of times the PRACH is transmitted in the SBFD symbol and the number of times the PRACH is transmitted in the non-SBFD symbol may be counted separately.

[0043] In combination with some embodiments of the first aspect, in some embodiments, the sixth parameter includes a first power and a second power, the first power is the maximum transmit power for sending PRACH on an SBFD symbol, and the second power is the maximum transmit power for sending PRACH on a non-SBFD symbol; wherein, based on the actual value of the target received power, the sixth parameter, and the seventh parameter, determining the transmit power used to send PRACH on the first time domain unit includes: determining the transmit power used to send PRACH on an SBFD symbol in 2-step access based on the actual value of the target received power for sending PRACH on an SBFD symbol in 2-step RA; based on the 2-step The actual value of the target received power for sending PRACH on non-SBFD symbols in RA, the second power, and the seventh parameter determine the transmit power used for sending PRACH on non-SBFD symbols in 2-step access; based on the actual value of the target received power for sending PRACH on SBFD symbols in 4-step RA, the first power, and the seventh parameter, determine the transmit power used for sending PRACH on SBFD symbols in 4-step access; based on the actual value of the target received power for sending PRACH on non-SBFD symbols in 4-step RA, the second power, and the seventh parameter, determine the transmit power used for sending PRACH on non-SBFD symbols in 4-step access.

[0044] In the above embodiment, the transmit power used to transmit the PRACH in the first time domain unit may be determined.

[0045] In combination with some embodiments of the first aspect, in some embodiments, the first information also includes an eighth parameter, which is used to identify the difference between the transmission power used to send PRACH on SBFD symbols and the transmission power used to send PRACH on non-SBFD symbols.

[0046] In the above embodiment, the difference between the transmit power used to send the PRACH on the SBFD symbol and the transmit power used to send the PRACH on the non-SBFD symbol may be configured.

[0047] In combination with some embodiments of the first aspect, in some embodiments, the first parameter includes at least one of the following: in 2-step RA, the expected value of the fifth target received power of PRACH sent on the first time domain unit; in 4-step RA, the expected value of the sixth target received power of PRACH sent on the first time domain unit; the second parameter includes at least one of the following: in 2-step RA, the fifth power climbing step for sending PRACH on the first time domain unit; in 4-step RA, the sixth power climbing step for sending PRACH on the first time domain unit; the third parameter includes a first count and a second count, the first count being the total number of times PRACH is sent on SBFD symbols and non-SBFD symbols in 2-step RA, and the second count being the total number of times PRACH is sent on SBFD symbols and non-SBFD symbols in 4-step RA; the fifth parameter includes a third offset, and the third offset is the power offset value for sending PRACH on the first time domain unit when switching from 2-step RA to 4-step RA.

[0048] In the above embodiment, the transmit power used to transmit the PRACH in the first time domain unit may be determined by determining various parameters.

[0049] In combination with some embodiments of the first aspect, in some embodiments, based on the first parameter, the second parameter, the third parameter, the fourth parameter, and the fifth parameter, respectively determining the actual value of the target received power for sending PRACH on SBFD symbols and non-SBFD symbols in 2-step RA and / or 4-step RA includes: determining the actual value of the target received power for sending PRACH on the first time domain unit in 2-step RA based on the expected value of the fifth target received power, the fifth power ramping step, the first count, and the fourth parameter; determining the actual value of the target received power for sending PRACH on SBFD symbols in 4-step RA based on the expected value of the sixth target received power, the sixth power ramping step, the second count, the fourth parameter, and the third offset.

[0050] In the above embodiment, the number of times the PRACH is transmitted in the SBFD symbol and the number of times the PRACH is transmitted in the non-SBFD symbol may be counted respectively to obtain the actual value of the target received power.

[0051] In combination with some embodiments of the first aspect, in some embodiments, the sixth parameter includes a first power and a second power, the first power being the maximum transmit power for sending PRACH on an SBFD symbol, and the second power being the maximum transmit power for sending PRACH on a non-SBFD symbol; the eighth parameter includes a first difference and a second difference, the first difference being the difference between the transmit power used to send PRACH on an SBFD symbol in a 2-step RA and the transmit power used to send PRACH on a non-SBFD symbol, and the second difference being the difference between the transmit power used to send PRACH on an SBFD symbol in a 4-step RA and the transmit power used to send PRACH on a non-SBFD symbol, wherein, based on the actual value of the target received power, the sixth parameter, the seventh parameter and / or the eighth parameter, determining the transmit power used to send PRACH on the first time domain unit includes: determining the transmit power used to send PRACH on the first time domain unit based on the actual value of the target received power, the sixth parameter, the seventh parameter and / or the eighth parameter The transmit power used for sending PRACH on SBFD symbols in 2-step access is determined based on the actual value of the target receive power for sending PRACH on the first time domain unit in 2-step RA, the second power, the seventh parameter, and the first difference. The transmit power used for sending PRACH on non-SBFD symbols in 2-step access is determined based on the actual value of the target receive power for sending PRACH on the first time domain unit in 2-step RA. The transmit power used for sending PRACH on SBFD symbols in 4-step access is determined based on the actual value of the target receive power for sending PRACH on the first time domain unit in 4-step RA, the first power, the seventh parameter, and the second difference. The transmit power used for sending PRACH on non-SBFD symbols in 4-step access is determined based on the actual value of the target receive power for sending PRACH on the first time domain unit in 4-step RA.

[0052] In the above embodiment, the transmit power used for transmitting the PRACH may be determined according to various parameters.

[0053] In combination with some embodiments of the first aspect, in some embodiments, the first information also includes a sixth parameter, wherein the sixth parameter includes a first power, the first power is the maximum transmit power for sending PRACH on an SBFD symbol, the second power is the protocol default, and the second power is the maximum transmit power for sending PRACH on a non-SBFD symbol; or the sixth parameter includes the second power, the first power is the protocol default; or the sixth parameter includes the first power and the second power, and the first power is different from the second power.

[0054] In the above embodiment, when the first power and the second power are different, differentiated configuration of the PRACH transmit power can be achieved.

[0055] In the second aspect, an embodiment of the present disclosure proposes a communication method, which is executed by a network device, and the method includes: sending first information to a terminal, the first information being used to configure a physical random access channel PRACH; based on the first information, determining the transmission power used to send the PRACH on a first time domain unit, the first time domain unit including a sub-band full-duplex SBFD symbol and a non-SBFD symbol.

[0056] In the above embodiment, the transmit power used to transmit the PRACH in the first time domain unit may be determined according to the first information.

[0057] In combination with some embodiments of the second aspect, in some embodiments, the first information includes a first parameter and a second parameter, the first parameter is used to identify the expected value of the target received power for sending PRACH, and the second parameter is used to identify the power ramp step for sending PRACH.

[0058] In the above embodiment, the first parameter and the second parameter may be determined according to the first information, so as to determine the transmit power used to transmit the PRACH on the first time domain unit according to the first parameter and the second parameter.

[0059] In combination with some embodiments of the second aspect, in some embodiments, based on the first information, determining the transmit power used to send PRACH on the first time domain unit includes: determining at least one of a third parameter, a fourth parameter, a fifth parameter, a sixth parameter, a seventh parameter, and an eighth parameter, the third parameter being used to identify the number of times PRACH is sent on the first time domain unit in 2-step RA and / or 4-step RA, the fourth parameter being used to identify the power offset value related to the preamble code format, the fifth parameter being used to identify the power offset value for switching from 2-step access to 4-step access, the sixth parameter being used to identify the maximum transmit power of the terminal, the seventh parameter being used to identify the path loss of the terminal, and the eighth parameter being used to identify the difference between the transmit power used to send PRACH on SBFD symbols and the transmit power used to send PRACH on non-SBFD symbols; based on the first parameter, the second parameter, the third parameter, the fourth parameter, and the fifth parameter, respectively, determining the actual value of the target receive power for sending PRACH on SBFD symbols and non-SBFD symbols in 2-step RA and / or 4-step RA; and determining the transmit power used to send PRACH on the first time domain unit based on the actual value of the target receive power, the sixth parameter, the seventh parameter, and / or the eighth parameter.

[0060] In the above embodiment, the transmit power used to transmit the PRACH in the first time domain unit may be determined by determining various parameters.

[0061] In combination with some embodiments of the second aspect, in some embodiments, in 2-step random access RA and / or 4-step RA, at least one of the first parameter and the second parameter on the SBFD symbol and the non-SBFD symbol is different.

[0062] In the above embodiment, it is possible to implement differential configuration of parameters of SBFD symbols and non-SBFD symbols, thereby achieving different transmission powers for SBFD symbols and non-SBFD symbols.

[0063] In combination with some embodiments of the second aspect, in some embodiments, the first parameter includes at least one of the following: in 2-step RA, the expected value of the first target received power of PRACH sent on SBFD symbols; in 2-step RA, the expected value of the second target received power of PRACH sent on non-SBFD symbols; in 4-step RA, the expected value of the third target received power of PRACH sent on SBFD symbols; in 4-step RA, the expected value of the fourth target received power of PRACH sent on non-SBFD symbols; the second parameter includes at least one of the following: in 2-step RA, the first power ramping step size of PRACH sent on SBFD symbols; in 2-step RA, the second power ramping step size of PRACH sent on non-SBFD symbols step size; in 4-step RA, the third power ramping step size for sending PRACH on SBFD symbols; in 4-step RA, the fourth power ramping step size for sending PRACH on non-SBFD symbols; the third parameter includes a first count and a second count, the first count is the total number of times PRACH is sent on SBFD symbols and non-SBFD symbols in 2-step RA, and the second count is the total number of times PRACH is sent on SBFD symbols and non-SBFD symbols in 4-step RA; the fifth parameter includes a first offset and a second offset, the first offset is the power offset value for sending PRACH on SBFD symbols when switching from 2-step RA to 4-step RA, and the second offset is the power offset value for sending PRACH on non-SBFD symbols when switching from 2-step RA to 4-step RA.

[0064] In the above embodiment, the transmit power used to transmit the PRACH in the first time domain unit may be determined by determining various parameters.

[0065] In combination with some embodiments of the second aspect, in some embodiments, determining the actual value of the target received power for sending PRACH on SBFD symbols and non-SBFD symbols in 2-step RA and / or 4-step RA based on the first parameter, the second parameter, the third parameter, the fourth parameter, and the fifth parameter, respectively, includes: determining the actual value of the target received power for sending PRACH on SBFD symbols in 2-step RA based on the expected value of the first target received power, the first power ramping step, the first count, and the fourth parameter; determining the actual value of the target received power for sending PRACH on non-SBFD symbols in 2-step RA based on the expected value of the second target received power, the second power ramping step, the first count, and the fourth parameter; determining the actual value of the target received power for sending PRACH on SBFD symbols in 4-step RA based on the expected value of the third target received power, the third power ramping step, the second count, the fourth parameter, and the first offset; determining the actual value of the target received power for sending PRACH on non-SBFD symbols in 4-step RA based on the expected value of the fourth target received power, the fourth power ramping step, the second count, the fourth parameter, and the second offset.

[0066] In the above embodiment, the number of times the PRACH is transmitted in the SBFD symbol and the non-SBFD symbol may be jointly counted.

[0067] In combination with some embodiments of the second aspect, in some embodiments, the first parameter includes at least one of the following: in 2-step RA, the expected value of the first target received power of PRACH sent on SBFD symbols; in 2-step RA, the expected value of the second target received power of PRACH sent on non-SBFD symbols; in 4-step RA, the expected value of the third target received power of PRACH sent on SBFD symbols; in 4-step RA, the expected value of the fourth target received power of PRACH sent on non-SBFD symbols; the second parameter includes at least one of the following: in 2-step RA, the first power ramping step size of PRACH sent on SBFD symbols; in 2-step RA, the second power ramping step size of PRACH sent on non-SBFD symbols; in 4-step RA, the first power ramping step size of PRACH sent on SBFD symbols. Three power ramping steps; in 4-step RA, the fourth power ramping step for sending PRACH on non-SBFD symbols; the third parameter includes a third count, a fourth count, a fifth count, and a sixth count, the third count being the number of times PRACH is sent on SBFD symbols in 2-step RA, the fourth count being the number of times PRACH is sent on non-SBFD symbols in 2-step RA, the fifth count being the number of times PRACH is sent on SBFD symbols in 4-step RA, and the sixth count being the number of times PRACH is sent on non-SBFD symbols in 4-step RA; the fifth parameter includes a first offset and a second offset, the first offset being the power offset value for sending PRACH on SBFD symbols when switching from 2-step RA to 4-step RA, and the second offset being the power offset value for sending PRACH on non-SBFD symbols when switching from 2-step RA to 4-step RA.

[0068] In the above embodiment, the transmit power used to transmit the PRACH in the first time domain unit may be determined by determining various parameters.

[0069] In combination with some embodiments of the second aspect, in some embodiments, determining the actual value of the target received power for sending PRACH on SBFD symbols and non-SBFD symbols in 2-step RA and / or 4-step RA based on the first parameter, the second parameter, the third parameter, the fourth parameter, and the fifth parameter, respectively, includes: determining the actual value of the target received power for sending PRACH on SBFD symbols in 2-step RA based on the expected value of the first target received power, the first power ramping step, the third count, and the fourth parameter; determining the actual value of the target received power for sending PRACH on non-SBFD symbols in 2-step RA based on the expected value of the second target received power, the second power ramping step, the fourth count, and the fourth parameter; determining the actual value of the target received power for sending PRACH on SBFD symbols in 4-step RA based on the expected value of the third target received power, the third power ramping step, the fifth count, the fourth parameter, and the first offset; determining the actual value of the target received power for sending PRACH on non-SBFD symbols in 4-step RA based on the expected value of the fourth target received power, the fourth power ramping step, the sixth count, the fourth parameter, and the second offset.

[0070] In the above embodiment, the number of times the PRACH is transmitted in the SBFD symbol and the number of times the PRACH is transmitted in the non-SBFD symbol may be counted separately.

[0071] In combination with some embodiments of the second aspect, in some embodiments, the sixth parameter includes a first power and a second power, the first power is the maximum transmit power for sending PRACH on an SBFD symbol, and the second power is the maximum transmit power for sending PRACH on a non-SBFD symbol; wherein, based on the actual value of the target received power, the sixth parameter, and the seventh parameter, determining the transmit power used to send PRACH on the first time domain unit includes: determining the transmit power used to send PRACH on an SBFD symbol in 2-step access based on the actual value of the target received power for sending PRACH on an SBFD symbol in 2-step RA; based on the 2-step The actual value of the target received power for sending PRACH on non-SBFD symbols in RA, the second power, and the seventh parameter determine the transmit power used for sending PRACH on non-SBFD symbols in 2-step access; based on the actual value of the target received power for sending PRACH on SBFD symbols in 4-step RA, the first power, and the seventh parameter, determine the transmit power used for sending PRACH on SBFD symbols in 4-step access; based on the actual value of the target received power for sending PRACH on non-SBFD symbols in 4-step RA, the second power, and the seventh parameter, determine the transmit power used for sending PRACH on non-SBFD symbols in 4-step access.

[0072] In the above embodiment, the transmit power used to transmit the PRACH in the first time domain unit may be determined.

[0073] In combination with some embodiments of the second aspect, in some embodiments, the first information also includes an eighth parameter, which is used to identify the difference between the transmission power used to send PRACH on SBFD symbols and the transmission power used to send PRACH on non-SBFD symbols.

[0074] In the above embodiment, the difference between the transmit power used to send the PRACH on the SBFD symbol and the transmit power used to send the PRACH on the non-SBFD symbol may be configured.

[0075] In combination with some embodiments of the second aspect, in some embodiments, the first parameter includes at least one of the following: in 2-step RA, the expected value of the fifth target received power of PRACH sent on the first time domain unit; in 4-step RA, the expected value of the sixth target received power of PRACH sent on the first time domain unit; the second parameter includes at least one of the following: in 2-step RA, the fifth power climbing step for sending PRACH on the first time domain unit; in 4-step RA, the sixth power climbing step for sending PRACH on the first time domain unit; the third parameter includes a first count and a second count, the first count being the total number of times PRACH is sent on SBFD symbols and non-SBFD symbols in 2-step RA, and the second count being the total number of times PRACH is sent on SBFD symbols and non-SBFD symbols in 4-step RA; the fifth parameter includes a third offset, and the third offset is the power offset value for sending PRACH on the first time domain unit when switching from 2-step RA to 4-step RA.

[0076] In the above embodiment, the transmit power used to transmit the PRACH in the first time domain unit may be determined by determining various parameters.

[0077] In combination with some embodiments of the second aspect, in some embodiments, based on the first parameter, the second parameter, the third parameter, the fourth parameter, and the fifth parameter, respectively determining the actual value of the target received power for sending PRACH on SBFD symbols and non-SBFD symbols in 2-step RA and / or 4-step RA includes: determining the actual value of the target received power for sending PRACH on the first time domain unit in 2-step RA based on the expected value of the fifth target received power, the fifth power ramping step, the first count, and the fourth parameter; determining the actual value of the target received power for sending PRACH on SBFD symbols in 4-step RA based on the expected value of the sixth target received power, the sixth power ramping step, the second count, the fourth parameter, and the third offset.

[0078] In the above embodiment, the number of times the PRACH is transmitted in the SBFD symbol and the number of times the PRACH is transmitted in the non-SBFD symbol may be counted respectively to obtain the actual value of the target received power.

[0079] In conjunction with some embodiments of the second aspect, in some embodiments, the sixth parameter includes a first power and a second power, the first power being the maximum transmit power for sending PRACH on an SBFD symbol, and the second power being the maximum transmit power for sending PRACH on a non-SBFD symbol; the eighth parameter includes a first difference and a second difference, the first difference being the difference between the transmit power used to send PRACH on an SBFD symbol in a 2-step RA and the transmit power used to send PRACH on a non-SBFD symbol, and the second difference being the difference between the transmit power used to send PRACH on an SBFD symbol in a 4-step RA and the transmit power used to send PRACH on a non-SBFD symbol. In which, determining the transmit power used to send PRACH on the first time domain unit based on the actual value of the target received power, the sixth parameter, the seventh parameter and / or the eighth parameter includes: determining the transmit power used to send PRACH on SBFD symbols in 2-step access based on the actual value of the target received power for sending PRACH on the first time domain unit in 2-step RA, the first power, the seventh parameter, and the first difference; determining the transmit power used to send PRACH on non-SBFD symbols in 2-step access based on the actual value of the target received power for sending PRACH on the first time domain unit in 2-step RA; determining the transmit power used to send PRACH on SBFD symbols in 4-step access based on the actual value of the target received power for sending PRACH on the first time domain unit in 4-step RA; determining the transmit power used to send PRACH on non-SBFD symbols in 4-step access based on the actual value of the target received power for sending PRACH on the first time domain unit in 4-step RA.

[0080] In the above embodiment, the transmit power used for transmitting the PRACH may be determined according to various parameters.

[0081] In combination with some embodiments of the second aspect, in some embodiments, the first information also includes a sixth parameter, wherein the sixth parameter includes a first power, the first power is the maximum transmit power for sending PRACH on an SBFD symbol, the second power is the protocol default, and the second power is the maximum transmit power for sending PRACH on a non-SBFD symbol; or the sixth parameter includes the second power, the first power is the protocol default; or the sixth parameter includes the first power and the second power, and the first power is different from the second power.

[0082] In the above embodiment, when the first power and the second power are different, differentiated configuration of the PRACH transmit power can be achieved.

[0083] In a third aspect, an embodiment of the present disclosure proposes a terminal, comprising a transceiver module for receiving first information sent by a network device, the first information being used to configure a physical random access channel PRACH; a processing module for determining, based on the first information, the transmit power used to send the PRACH on a first time domain unit, the first time domain unit comprising sub-band full-duplex SBFD symbols and non-SBFD symbols.

[0084] In fourth aspect, an embodiment of the present disclosure proposes a network device, including a transceiver module for sending first information to a terminal, the first information being used to configure a physical random access channel PRACH; a processing module for determining, based on the first information, the transmit power used to send the PRACH on a first time domain unit, the first time domain unit including sub-band full-duplex SBFD symbols and non-SBFD symbols.

[0085] In a fifth aspect, an embodiment of the present disclosure proposes a communication device, which includes: one or more processors; wherein the one or more processors are used to call instructions to enable the communication device to execute any method in the first aspect, or any method in the second aspect.

[0086] In the sixth aspect, an embodiment of the present disclosure proposes a communication system, which includes: a terminal and a network device; wherein the terminal is configured to execute the method described in the first aspect and the optional implementation of the first aspect, and the network device is configured to execute the method described in the second aspect and the optional implementation of the second aspect.

[0087] In the seventh aspect, an embodiment of the present disclosure proposes a storage medium, wherein the computer storage medium stores computer-executable instructions; after the computer-executable instructions are executed by the processor, the method described in the first aspect, the optional implementation of the first aspect, the second aspect, and the optional implementation of the second aspect can be executed.

[0088] In an eighth aspect, an embodiment of the present disclosure proposes a computer program product, characterized in that it includes a computer program, and when the computer program is executed by a processor, it implements the method of any one of the embodiments of the first and second aspects of the present disclosure.

[0089] It is understandable that the above-mentioned terminals, network devices, communication devices, communication systems, and storage media are all used to execute the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding methods and will not be repeated here.

[0090] The present disclosure provides a communication method, communication device, communication system, and storage medium. In some embodiments, the terms "communication method," "information processing method," and "communication method" are interchangeable; the terms "terminal," "network device," and "communication device" are interchangeable; and the terms "information processing system" and "communication system" are interchangeable.

[0091] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0092] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0093] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0094] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., can mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article can be understood as a singular expression or a plural expression.

[0095] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0096] In some embodiments, the terms "at least one of", "at least one of", "at least one of", "one or more", "a plurality of", "multiple", etc. can be used interchangeably.

[0097] In the embodiments of the present disclosure, descriptions such as “at least one of A, B, C…”, “A and / or B and / or C…”, etc. include the situation where any one of A, B, C… exists alone, and also include any combination of any multiple of A, B, C…, and each situation can exist alone; for example, “at least one of A, B, C” includes the situation where A exists alone, B exists alone, C exists alone, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B, and C; for example, A and / or B includes the situation where A exists alone, B exists alone, and the combination of A and B.

[0098] In some embodiments, descriptions such as "in one case A, in another case B," or "in response to one case A, in response to another case B," may include the following technical solutions depending on the situation: executing A independently of B (in some embodiments, A); executing B independently of A (in some embodiments, B); selectively executing A and B (in some embodiments, selecting between A and B); and executing both A and B (in some embodiments, A and B). The same applies when there are more branches, such as A, B, and C.

[0099] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0100] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0101] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0102] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not less than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0103] In some embodiments, devices, etc. can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", and "subject" can be used interchangeably.

[0104] In some embodiments, the terms "access network device (AN device)", "radio access network device (RAN device)", "base station (BS)", "radio base station" "fixed station", "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "carrier", "component carrier", "bandwidth part (BWP)" and the like may be used interchangeably.

[0105] In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal", "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc. can be used interchangeably.

[0106] In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the communication between the access network device, the core network device, or the network device and the terminal is replaced by communication between multiple terminals (for example, it can also be called device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it can also be set as a structure in which the terminal has all or part of the functions of the access network device. In addition, language such as "uplink" and "downlink" can also be replaced by language corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can be replaced by side channels, and uplinks, downlinks, etc. can be replaced by side links.

[0107] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may have a structure that has all or part of the functions of the terminal.

[0108] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "codeword", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0109] In some embodiments, terms such as "uplink", "uplink", "physical uplink" can be interchangeable with each other, and terms such as "downlink", "downlink", "physical downlink" can be interchangeable with each other, and terms such as "side", "sidelink", "side communication", "sidelink communication", "direct connection", "direct link", "direct communication", "direct link communication" can be interchangeable with each other.

[0110] In some embodiments, the terms "downlink control information (DCI)", "downlink (DL) assignment", "DL DCI", "uplink (UL) grant", "UL DCI" and the like may be used interchangeably.

[0111] In some embodiments, terms such as "physical downlink shared channel (PDSCH)" and "DL data" can be used interchangeably, and terms such as "physical uplink shared channel (PUSCH)" and "UL data" can be used interchangeably.

[0112] In some embodiments, the terms "radio", "wireless", "radio access network (RAN)", "access network (AN)", "RAN-based" and the like may be used interchangeably.

[0113] In some embodiments, terms such as "synchronization signal (SS)", "synchronization signal block (SSB)", "reference signal (RS)", "pilot", and "pilot signal" can be used interchangeably.

[0114] In some embodiments, terms such as "moment", "time point", "time", and "time position" can be replaced with each other, and terms such as "duration", "period", "time window", "window", and "time" can be replaced with each other.

[0115] In some embodiments, "obtain", "get", "obtain", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from a protocol, obtaining by self-processing, autonomous implementation, etc.

[0116] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0117] In some embodiments, "predetermined" and "preset" can be interpreted as pre-specified in a protocol, etc., or can be interpreted as a pre-set action performed by a device, etc.

[0118] In some embodiments, determining may be interpreted as judging, calculating, computing, processing, deriving, investigating, searching, looking up, retrieving, ascertaining, receiving, transmitting, inputting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, “assuming,” “expecting,” “considering,” broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, and the like, but is not limited thereto.

[0119] In some embodiments, the determination or judgment can be performed by a value represented by 1 bit (0 or 1), or by a true or false value (Boolean value) represented by true or false, or by comparing numerical values ​​(for example, comparison with a predetermined value), but is not limited thereto.

[0120] In some embodiments, "network" can be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

[0121] In some embodiments, "not expecting to receive" can be interpreted as not receiving on time domain resources and / or frequency domain resources, or as not performing subsequent processing on the data after receiving it; "not expecting to send" can be interpreted as not sending, or as sending but not expecting the recipient to respond to the content sent.

[0122] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0123] In some embodiments, data, information, etc. may be obtained after obtaining the user's consent. In order to solve the above problems, the present disclosure proposes a communication method, a communication device, a communication system, and a storage medium.

[0124] FIG1 is a schematic diagram illustrating an architecture of a communication system according to an embodiment of the present disclosure. As shown in FIG1 , a communication system 100 may include a terminal 101 and a network device 102 .

[0125] In some embodiments, the terminal includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0126] In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network. The access network device may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a wireless fidelity (WiFi) system, but is not limited thereto.

[0127] In some embodiments, the technical solution of the present disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within the access network devices involved in the embodiments of the present disclosure can be transformed into internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0128] In some embodiments, the access network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the access network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0129] In some embodiments, a core network device may be a single device comprising one or more network elements, or may be a plurality of devices or a group of devices, each comprising all or part of one or more network elements. A network element may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0130] In some embodiments, the above-mentioned one or more network elements may include, for example, AMF, UPF, MME, etc., and may also include other network elements, such as Policy Control Function (PCF), Application Function (AF), Network Application Function (NAF), Application Layer Authentication and Key Management Anchor Function (AAnF), Bootstrapping Server Functionality (BSF), Session Management Function (SMF), etc.

[0131] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0132] The following embodiments of the present disclosure may be applied to the communication system 100 shown in Figure 1, or a portion thereof, but are not limited thereto. The entities shown in Figure 1 are illustrative only. The communication system may include all or part of the entities shown in Figure 1, or may include other entities outside of Figure 1. The number and form of the entities may be arbitrary. The connection relationship between the entities is illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0133] The embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X), systems utilizing other communication methods, and next-generation systems based on and extending these methods. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0134] To improve uplink (UL) coverage and throughput, related technologies will study subband full duplex (SBFD). Specifically, a carrier component (CC) is divided into multiple subbands (SBs) in the frequency domain on a downlink (DL) or flexible (F) symbol. The multiple SBs include a UL subband and at least one (one or two) DL subbands. The base station can send DL signals on the DL subband and receive UL signals on the UL subband at the same time. The DL or F symbol is configured with time division duplex uplink and downlink common configuration (TDD-UL-DL-ConfigCommon) or time division duplex uplink and downlink dedicated configuration (TDD-UL-DL-ConfigDedicated), or the DL or F symbol is a DL or F symbol indicated by downlink control information format 2-0 (DCI2-0). When a symbol includes both DL subband and UL subband in the frequency domain, it can be called an SBFD symbol. Similarly, when a time slot includes multiple symbols including at least one SBFD symbol, the time slot can be called an SBFD time slot.

[0135] In addition, a guard band (GB) may exist between the DL subband and the UL subband. Frequency domain isolation can reduce interference between DL signals in the DL subband and UL signals in the UL subband.

[0136] In SBFD symbols, GB and DL subbands are not available for UL transmission, while UL subbands are available for UL transmission. In SBFD symbols, the frequency domain range available for UL transmission is referred to as the UL available frequency domain range, and the frequency domain range unavailable for UL transmission is referred to as the UL unavailable frequency domain range. Based on the above analysis, the UL frequency domain ranges of non-SBFD symbols and SBFD symbols are different. The UL available frequency domain range is the UL frequency domain range on the CC. In SBFD symbols, the UL available frequency domain range on the UL BWP refers to the frequency domain range where the BWP overlaps with the UL available frequency domain range on the CC. Unless otherwise specified, the UL available frequency domain range referred to below refers to the UL available frequency domain range on the BWP.

[0137] When the UE is in idle state and initially accesses a cell, it measures information such as the received signal strength of the synchronization broadcast block (SynchronizationSignal / PhysicalBroadcastChannelBlock, SSB) beam and selects the optimal SSB beam. In the optimal SSB beam direction, the UE sends a PRACH signal at the random access channel opportunity (RACH Occasion, RO) for random access. In addition, in other states, the UE can also send a PRACH signal at the RO for random access. Random access includes contention-based random access (Contention-Based Random Access, CBRA) and non-contention-based random access (Contention-Free Random Access, CFRA). In CBRA, there are multiple UEs using the same preamble sequence (preamble), that is, the PRACH signals of two UEs conflict, which will cause random access to fail.

[0138] In SBFD symbols, UEs can transmit uplink signals in the UL SB. Therefore, by configuring ROs in SBFD symbols, the network can increase the number of ROs compared to configuring ROs only in UL or F symbols. UEs that recognize SBFD symbol configuration (SBFD-aware UEs) can perform random access in ROs configured in SBFD symbols, reducing access latency and the probability of PRACH signal collisions between different UEs in CBRA.

[0139] Considering that the interference conditions in SBFD symbols and non-SBFD symbols are significantly different, the PRACH transmission power parameters can be configured differently for SBFD and non-SBFD symbols. This enables SBFD-aware UEs to transmit with different powers in SBFD and non-SBFD symbols. For example, the following method can be used to enable SBFD-aware UEs to transmit with different powers in SBFD and non-SBFD symbols:

[0140] The PRACH transmit power on the SBFD symbols is reduced to reduce the UE-UE cross-link interference (UE-UE CLI) from the UE to other UEs.

[0141] Increase the PRACH transmit power on SBFD symbols to overcome the impact of base station-to-base station cross-link interference (gNB-gNB CLI) on PRACH transmission performance.

[0142] Random Access (RA) can be divided into 4-step random access (4-step RA) and 2-step random access (2-step RA) according to the number of steps in the RA process, and can be divided into CBRA and CFRA according to whether the Preamble used by the UE will conflict with the Preamble of other UEs.

[0143] In CBRA with 4-step RA type, the UE sends Message 1 (Msg1) and Message 3 (Msg3), and the gNB sends Message 2 (Msg2) and Message 4 (Msg4), completing random access in four steps. Msg1 is the PRACH signal. Furthermore, the gNB must pre-configure the preamble used by the UE's PRACH signal.

[0144] In CBRA with 2-step RA type, the UE sends MsgA and the gNB sends MsgB, completing random access in two steps. MsgA includes MsgA-PRACH and MsgA-PUSCH signals.

[0145] In CFRA with 4-step RA type, the UE sends Msg1 and the gNB sends Msg2, completing random access in two steps. Msg1 is the PRACH signal. Furthermore, the gNB must pre-configure the preamble used by the UE's PRACH signal.

[0146] Related technologies can configure power parameters for PRACH. For different random accesses, the related power parameters are configured as follows.

[0147] The relevant power parameters in 4-step RA are configured as follows:

[0148] The target received power sent by PRACH (preambleReceivedTargetPower);

[0149] Power ramping step for PRACH transmission.

[0150] For example, after PRACH transmission fails, when the beam is not switched, the next PRACH transmission power increases by powerRampingStep; after PRACH transmission fails, when the beam is switched, the next PRACH transmission power remains unchanged.

[0151] The relevant power parameters in 2-step RA are configured as follows:

[0152] MsgA-PRACH sent target received power (msgA-Preamble Received Target Power-r16);

[0153] The power ramping step size for MsgA-PRACH transmission (msgA-Preamble Power Ramping Step-r16).

[0154] For example, after MsgA-PRACH transmission fails and the beam is not switched, the next MsgA-PRACH transmission power increases by msgA-Preamble Power Ramping Step-r16; after MsgA-PRACH transmission fails and the beam is switched, the next MsgA-PRACH transmission power remains unchanged.

[0155] If RACH resources for both 4-step RA and 2-step RA are configured, the UE can determine whether to use 4-step RA or 2-step RA based on parameters configured by higher layers and / or higher layer instructions and / or PDCCH order instructions. If 2-step RA is used, it will switch to 4-step RA after the number of msgA failures reaches msgA-TransMax-r16.

[0156] The transmit power of the PRACH can be determined based on the power parameters configured above, as follows.

[0157] The transmit power of MsgA-PRACH for 2-step RA is as follows:

[0158] The target received power of MsgA-PRACH is TargetPower#1, where TargetPower#1 = msgA-PreambleReceivedTargetPower-r16+delta+(counter#1–1)×msgA-PreamblePowerRampingStep-r16

[0159] Then the MsgA-PRACH transmission power is min{PCMAX,TargetPower#1+PL}

[0160] The transmit power of the PRACH for 4-step RA is as follows:

[0161] The target received power of the PRACH for 4-step RA is TargetPower#2, where TargetPower#2 = preamble Received Target Power + delta + (counter#2–1) × power Ramping Step + poweroffset#2. Poweroffset#2 = (counter#1–1) × (PreamblePowerRampingStep–r16–powerRampingStep).

[0162] Among them, counter#1 is the number of MsgA-PRACH transmissions on 2-step RA before switching to 4-step RA.

[0163] If 2-step RA is not performed before 4-step RA, poweroffset#2 is 0. delta is the power offset value related to the Preamble format and is a real number.

[0164] The transmit power of the PRACH of 4-step RA is min{PCMAX,TargetPower#2+PL}

[0165] In the above formula, PCMAX is the maximum transmit power of the UE, and PL is the path loss of the UE, which can be measured based on the reference signal.

[0166] The above transmit power determination method uses the same transmit power for SBFD and non-SBFD symbols when RO can transmit PRACH signals while both SBFD and non-SBFD symbols exist. This is not conducive to reducing UE-UE CLI interference to other UEs or overcoming the impact of gNB-gNB CLI on PRACH transmission performance.

[0167] To address the above issues, the present disclosure proposes a communication method that can differentially configure the power parameters of PRACH on SBFD and non-SBFD symbols when RO can send PRACH signals while SBFD and non-SBFD symbols exist, thereby enabling differentiated transmission power of PRACH signals on SBFD and non-SBFD symbols.

[0168] The specific content of this method is as follows.

[0169] FIG2 is an interactive diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG2 , the embodiment of the present disclosure relates to a communication method for a communication system 100, which may include a terminal 101 and a network device 102. The method includes:

[0170] Step 2101: The network device sends first information to the terminal.

[0171] In some embodiments, the first information may be used to configure a physical random access channel PRACH.

[0172] In some embodiments, the first information includes a first parameter and a second parameter, the first parameter is used to identify an expected value of a target received power (preambleReceivedTargetPower) for sending PRACH, and the second parameter is used to identify a power ramping step (powerRampingStep) for sending PRACH.

[0173] Step 2102: The terminal determines the transmit power used to transmit the PRACH in the first time domain unit.

[0174] In some embodiments, the transmit power used to transmit the PRACH in a first time domain unit may be determined based on the first information, where the first time domain unit includes a sub-band full-duplex SBFD symbol and a non-SBFD symbol.

[0175] In some embodiments, determining, based on the first information, a transmit power used to transmit the PRACH in the first time domain unit includes:

[0176] Determine at least one of a third parameter, a fourth parameter, a fifth parameter, a sixth parameter, a seventh parameter, and an eighth parameter, where the third parameter is used to identify the number of times a PRACH is sent on a first time domain unit in 2-step RA and / or 4-step RA, the fourth parameter is used to identify a power offset value related to a preamble format, the fifth parameter is used to identify a power offset value for switching from 2-step access to 4-step access, the sixth parameter is used to identify the maximum transmit power of the terminal, the seventh parameter is used to identify the path loss of the terminal, and the eighth parameter is used to identify the difference between the transmit power used for sending the PRACH on an SBFD symbol and the transmit power used for sending the PRACH on a non-SBFD symbol; based on the first parameter, the second parameter, the third parameter, the fourth parameter, and the fifth parameter, respectively determine actual values ​​of target receive powers for sending the PRACH on SBFD symbols and non-SBFD symbols in 2-step RA and / or 4-step RA; and based on the actual value of the target receive power, the sixth parameter, the seventh parameter, and / or the eighth parameter, determine the transmit power used for sending the PRACH on the first time domain unit.

[0177] Option 1

[0178] In some embodiments, in 2-step random access (RA) and / or 4-step (RA), at least one of the first parameter and the second parameter is different across SBFD symbols and non-SBFD symbols.

[0179] In other words, at least one of the first parameter and the second parameter on the SBFD symbol and the non-SBFD symbol may be configured differently.

[0180] For example, the configuration scheme could be:

[0181] 2-step RA: preambleReceivedTargetPower#1_1, preambleReceivedTargetPower#1_2, powerRampingStep#1_1, powerRampingStep#1_2 in SBFD and non-SBFD symbols respectively.

[0182] 4-step RA: preambleReceivedTargetPower#2_1, preambleReceivedTargetPower#2_2, powerRampingStep#2_1, powerRampingStep#2_2 in SBFD and non-SBFD symbols respectively.

[0183] Example 1

[0184] In some embodiments, the first parameter includes at least one of the following: in 2-step RA, an expected value of a first target received power of the PRACH sent on SBFD symbols; in 2-step RA, an expected value of a second target received power of the PRACH sent on non-SBFD symbols; in 4-step RA, an expected value of a third target received power of the PRACH sent on SBFD symbols; in 4-step RA, an expected value of a fourth target received power of the PRACH sent on non-SBFD symbols;

[0185] The second parameter includes at least one of the following: a first power ramping step size for transmitting PRACH on SBFD symbols in 2-step RA; a second power ramping step size for transmitting PRACH on non-SBFD symbols in 2-step RA; a third power ramping step size for transmitting PRACH on SBFD symbols in 4-step RA; and a fourth power ramping step size for transmitting PRACH on non-SBFD symbols in 4-step RA.

[0186] The third parameter includes a first count and a second count, the first count being the total number of times the PRACH is sent on SBFD symbols and non-SBFD symbols in a 2-step RA, and the second count being the total number of times the PRACH is sent on SBFD symbols and non-SBFD symbols in a 4-step RA;

[0187] The fifth parameter includes a first offset and a second offset, the first offset being the power offset value for sending PRACH on SBFD symbols when switching from 2-step RA to 4-step RA, and the second offset being the power offset value for sending PRACH on non-SBFD symbols when switching from 2-step RA to 4-step RA.

[0188] In other words, the number of times PRACH is sent on SBFD symbols and non-SBFD symbols for 2-step RA and / or 4-step RA can be jointly counted. That is, for the same type of random access, the PRACH sent on different symbols is not distinguished, but the count is unified. For example, when the first count of 2-step RA is counter#1 and the second count of 4-step RA is counter#2, when PRACH is sent on SBFD symbols for the first time, 2-step RA is used, and when it is sent on non-SBFD symbols for the second time, 2-step RA is used. Assuming that the transmission of PRACH fails at this time, it switches to 4-step RA, and sends it on non-SBFD symbols for the third time, 4-step RA is used. Then, counter#1 is 2 and counter#2 is 1.

[0189] For example, the actual value of the target received power for sending PRACH on the SBFD symbol in the 2-step RA can be expressed as TargetPower#1_1, the expected value of the first target received power can be expressed as preamble Received Target Power#1_1, the first power ramping step can be expressed as power Ramping Step#1_1, the first count can be expressed as counter#1, and the fourth parameter can be expressed as delta;

[0190] For example, the actual value of the target received power for sending PRACH on non-SBFD symbols in 2-step RA can be expressed as TargetPower#1_2, the expected value of the second target received power can be expressed as preamble Received Target Power#1_2, the second power ramping step can be expressed as power Ramping Step#1_2, the first counter can be expressed as counter#1, and the fourth parameter can be expressed as delta;

[0191] For example, the actual value of the target received power for sending PRACH on the SBFD symbol in the 4-step RA can be expressed as TargetPower#2_1, the expected value of the third target received power can be expressed as preamble Received Target Power#2_1, the third power ramping step can be expressed as power Ramping Step#2_1, the second count can be expressed as counter#2, the fourth parameter can be expressed as delta, and the first offset can be expressed as poweroffset#2_1;

[0192] For example, the actual value of the target received power for sending PRACH on non-SBFD symbols in the 4-step RA can be expressed as TargetPower#2_2, the expected value of the fourth target received power can be expressed as preamble Received Target Power#2_2, the fourth power ramping step can be expressed as power Ramping Step#2_2, the second count can be expressed as counter#2, the fourth parameter can be expressed as delta, and the second offset can be expressed as poweroffset#2_2.

[0193] In some embodiments, determining, based on the first parameter, the second parameter, the third parameter, the fourth parameter, and the fifth parameter, respectively, actual values ​​of target received powers for transmitting PRACH on SBFD symbols and non-SBFD symbols in 2-step RA and / or 4-step RA includes:

[0194] Based on the expected value of the first target received power, the first power ramping step size, the first counter, and the fourth parameter, the actual value of the target received power for sending PRACH on the SBFD symbol in the 2-step RA is determined, i.e., TargetPower#1_1 = preamble Received Target Power#1_1 + delta + (counter#1-1) × power ramping step#1_1

[0195] Based on the expected value of the second target received power, the second power ramping step size, the first counter, and the fourth parameter, the actual value of the target received power for sending PRACH on non-SBFD symbols in the 2-step RA is determined, i.e., TargetPower#1_2 = preamble Received Target Power#1_2 + delta + (counter#1-1) × power ramping step#1_2

[0196] Based on the expected value of the third target received power, the third power ramping step size, the second counter, the fourth parameter, and the first offset, the actual value of the target received power for sending PRACH on the SBFD symbol in the four-step RA is determined, i.e., TargetPower#2_1 = preamble Received Target Power#2_1 + delta + (counter#2-1) × power ramping step#2_1 + poweroffset#2_1

[0197] Based on the expected value of the fourth target received power, the fourth power ramping step size, the second count, the fourth parameter, and the second offset, the actual value of the target received power for sending PRACH on non-SBFD symbols in the four-step RA is determined, i.e., TargetPower#2_2 = preamble Received Target Power#2_2 + delta + (counter#-1) × power ramping step#2_2 + poweroffset#2_2

[0198] In the above embodiment, the specific values ​​of the first offset poweroffset#2_1 and the second offset poweroffset#2_2 can be determined by the following method:

[0199] First, define the values ​​of value#1 to 4 as follows: value#1 = (counter#1–1) × (power Ramping Step#1_1–power Ramping Step#2_1) value#2 = (counter#1–1) × (power Ramping Step#1_2–power Ramping Step#2_2) value#3 = {value#1, value#2}

[0200] Indicates that the value of value#3 is one of value#1 and value#2. value#4 = (counter#1_4–1)×(power Ramping Step#1_1–power Ramping Step#2_1) + (counter#1_5–1)×(power Ramping Step#1_2–power Ramping Step#2_2)

[0201] Value 1: poweroffset#2_1=value#1 poweroffset#2_2=value#2

[0202] Value 2: poweroffset#2_1=poweroffset#2_2=value#3

[0203] Value 3: poweroffset#2_1=poweroffset#2_2=value#4

[0204] Among them, counter#1 is the joint count of the number of PRACH transmissions in 2-step RA on SBFD and non-SBFD symbols before switching to 4-step RA; counter#1_4 and counter#1_5 are the counts of SBFD and non-SBFD symbols in counter#1, respectively, and counter#1 = counter#1_4 + counter#1_5.

[0205] For example, the specific values ​​of the first offset poweroffset#2_1 and the second offset poweroffset#2_2 can be any one of the above three value solutions.

[0206] In some embodiments, the fourth parameter delta is a real number, and its specific value can be determined according to the protocol agreement.

[0207] In some embodiments, the sixth parameter includes a first power and a second power, the first power being the maximum transmit power for transmitting the PRACH on an SBFD symbol, and the second power being the maximum transmit power for transmitting the PRACH on a non-SBFD symbol.

[0208] For example, the first power may be expressed as PCMAX_SBFD, the second power may be expressed as PCMAX_non_SBFD, and the seventh parameter may be expressed as PL.

[0209] Determining, based on the actual value of the target received power, the sixth parameter, and the seventh parameter, the transmit power used to send the PRACH on the first time domain unit includes:

[0210] Based on the actual value of the target received power for sending PRACH on SBFD symbols in 2-step RA, the first power, and the seventh parameter, determine the transmit power used for sending PRACH on SBFD symbols in 2-step RA, that is, min{PCMAX_SBFD,TargetPower#1_1+PL}

[0211] Based on the actual value of the target received power for sending PRACH on non-SBFD symbols in 2-step RA, the second power, and the seventh parameter, determine the transmit power used for sending PRACH on non-SBFD symbols in 2-step RA, that is, min{PCMAX_non_SBFD,TargetPower#1_2+PL}

[0212] Based on the actual value of the target received power for sending PRACH on SBFD symbols in 4-step RA, the first power, and the seventh parameter, determine the transmit power used for sending PRACH on SBFD symbols in 4-step access, that is, min{PCMAX_SBFD,TargetPower#2_1+PL}

[0213] Based on the actual value of the target received power for sending PRACH on non-SBFD symbols in 4-step RA, the second power, and the seventh parameter, determine the transmit power used for sending PRACH on non-SBFD symbols in 4-step RA, that is, min{PCMAX_non_SBFD,TargetPower#2_2+PL}

[0214] Example 2

[0215] In some embodiments, the first parameter includes at least one of the following: in 2-step RA, an expected value of a first target received power of the PRACH sent on SBFD symbols; in 2-step RA, an expected value of a second target received power of the PRACH sent on non-SBFD symbols; in 4-step RA, an expected value of a third target received power of the PRACH sent on SBFD symbols; in 4-step RA, an expected value of a fourth target received power of the PRACH sent on non-SBFD symbols;

[0216] The second parameter includes at least one of the following: a first power ramping step size for transmitting PRACH on SBFD symbols in 2-step RA; a second power ramping step size for transmitting PRACH on non-SBFD symbols in 2-step RA; a third power ramping step size for transmitting PRACH on SBFD symbols in 4-step RA; and a fourth power ramping step size for transmitting PRACH on non-SBFD symbols in 4-step RA.

[0217] The third parameter includes a third count, a fourth count, a fifth count, and a sixth count, where the third count is the number of times the PRACH is sent on SBFD symbols in a 2-step RA, the fourth count is the number of times the PRACH is sent on non-SBFD symbols in a 2-step RA, the fifth count is the number of times the PRACH is sent on SBFD symbols in a 4-step RA, and the sixth count is the number of times the PRACH is sent on non-SBFD symbols in a 4-step RA.

[0218] The fifth parameter includes a first offset and a second offset, the first offset being the power offset value for sending PRACH on SBFD symbols when switching from 2-step RA to 4-step RA, and the second offset being the power offset value for sending PRACH on non-SBFD symbols when switching from 2-step RA to 4-step RA.

[0219] In other words, the PRACH transmitted on the SBFD symbols and the PRACH transmitted on the non-SBFD symbols can be counted separately, and the random access type and the time domain symbol type used for transmission can be distinguished. For example, the number of times PRACH is sent on the SBFD symbols in the 2-step RA is the third count, which can be expressed as counter#1_1; the number of times PRACH is sent on the non-SBFD symbols in the 2-step RA is the fourth count, which can be expressed as counter#1_2; the number of times PRACH is sent on the SBFD symbols in the 4-step RA is the fifth count, which can be expressed as counter#2_1; and the number of times PRACH is sent on the non-SBFD symbols in the 4-step RA is the sixth count, which can be expressed as counter#2_2.

[0220] In some embodiments, determining, based on the first parameter, the second parameter, the third parameter, the fourth parameter, and the fifth parameter, respectively, actual values ​​of target received powers for transmitting PRACH on SBFD symbols and non-SBFD symbols in 2-step RA and / or 4-step RA includes:

[0221] Based on the expected value of the first target received power, the first power ramping step size, the third counter, and the fourth parameter, the actual value of the target received power for sending PRACH on the SBF D symbol in the 2-step RA is determined, that is, TargetPower#1_1 = preambleReceivedTargetPower#1_1 + delta + (counter#1_1–1) × powerRampingStep#1_1

[0222] Based on the expected value of the second target received power, the second power ramping step size, the fourth counter, and the fourth parameter, the actual value of the target received power for sending PRACH on non-SBFD symbols in the 2-step RA is determined, i.e., TargetPower#1_2 = preambleReceivedTargetPower#1_2 + delta + (counter#1_2–1) × powerRampingStep#1_2

[0223] Based on the expected value of the third target received power, the third power ramping step size, the fifth counter, the fourth parameter, and the first offset, the actual value of the target received power for sending PRACH on the SBFD symbol in the four-step RA is determined, that is, TargetPower#2_1 = preambleReceivedTargetPower#2_1 + delta + (counter#2_1–1) × powerRampingStep#2_1 + poweroffset#2_1

[0224] Based on the expected value of the fourth target received power, the fourth power ramping step size, the sixth counter, the fourth parameter, and the second offset, the actual value of the target received power for sending PRACH on non-SBFD symbols in the four-step RA is determined, i.e., TargetPower#2_2 = preambleReceivedTargetPower#2_2 + delta + (counter#2_2 – 1) × powerRampingStep#2_2 + poweroffset#2_2

[0225] In some embodiments, determining, based on the actual value of the target received power, the sixth parameter, and the seventh parameter, the transmit power used to transmit the PRACH on the first time domain unit includes:

[0226] Based on the actual value of the target received power for sending PRACH on SBFD symbols in 2-step RA, the first power, and the seventh parameter, determine the transmit power used for sending PRACH on SBFD symbols in 2-step RA, that is, min{PCMAX_SBFD,TargetPower#1_1+PL}

[0227] Based on the actual value of the target received power for sending PRACH on non-SBFD symbols in 2-step RA, the second power, and the seventh parameter, determine the transmit power used for sending PRACH on non-SBFD symbols in 2-step RA, that is, min{PCMAX_non_SBFD,TargetPower#1_2+PL}

[0228] Based on the actual value of the target received power for sending PRACH on SBFD symbols in 4-step RA, the first power, and the seventh parameter, determine the transmit power used for sending PRACH on SBFD symbols in 4-step access, that is, min{PCMAX_SBFD,TargetPower#2_1+PL}

[0229] Based on the actual value of the target received power for sending PRACH on non-SBFD symbols in 4-step RA, the second power, and the seventh parameter, determine the transmit power used for sending PRACH on non-SBFD symbols in 4-step RA, that is, min{PCMAX_non_SBFD,TargetPower#2_2+PL}

[0230] In the above embodiment, the specific values ​​of the first offset poweroffset#2_1 and the second offset poweroffset#2_2 can be determined by the following method: poweroffset#2_1=(counter#1_1–1)×(preamble Received Target Power#1_1 -preamble Received Target Power#2_1) poweroffset#2_2=(counter#1_2–1)×(preamble Received Target Power#1_2 -preamble Received Target Power#2_2)

[0231] Among them, counter#1_1 and counter#1_2 are the number of times PRACH is sent in SBFD and non-SBFD symbols using 2-step RA before switching to 4-step RA. If 2-step RA is not performed before 4-step RA, poweroffset#2_1 and poweroffset#2_2 are 0.

[0232] In some embodiments, the fourth parameter delta is a real number, and its specific value can be determined according to the protocol agreement.

[0233] In the above solution 1, PCMAX_SBFD and PCMAX_non_SBFD represent the maximum transmit power allowed by PRACH on SBFD and non-SBFD symbols respectively, and their values ​​can be the same or different. If the values ​​are different, differentiated configuration of the transmit power of different symbols can be achieved.

[0234] Option 2

[0235] In some embodiments, the first information further includes an eighth parameter, where the eighth parameter is used to identify a difference between a transmit power used to send the PRACH on an SBFD symbol and a transmit power used to send the PRACH on a non-SBFD symbol.

[0236] In other words, the difference between the transmit power used to send PRACH on SBFD symbols and the transmit power used to send PRACH on non-SBFD symbols can be configured to achieve differentiated configuration of the transmit power on SBFD symbols and the transmit power used on non-SBFD symbols.

[0237] Example 1

[0238] In some embodiments, the first parameter includes at least one of the following: in 2-step RA, an expected value of a fifth target received power for sending PRACH on the first time domain unit; in 4-step RA, an expected value of a sixth target received power for sending PRACH on the first time domain unit;

[0239] The second parameter includes at least one of the following: in 2-step RA, a fifth power ramping step size for sending PRACH on the first time domain unit; in 4-step RA, a sixth power ramping step size for sending PRACH on the first time domain unit;

[0240] The third parameter includes a first count and a second count, the first count being the total number of times the PRACH is sent on SBFD symbols and non-SBFD symbols in a 2-step RA, and the second count being the total number of times the PRACH is sent on SBFD symbols and non-SBFD symbols in a 4-step RA;

[0241] The fifth parameter includes a third offset, where the third offset is a power offset value for sending the PRACH on the first time domain unit when switching from 2-step RA to 4-step RA.

[0242] In some embodiments, the sixth parameter includes a first power and a second power, the first power being the maximum transmit power for transmitting the PRACH on the SBFD symbol, and the second power being the maximum transmit power for transmitting the PRACH on the non-SBFD symbol;

[0243] The eighth parameter includes a first difference and a second difference, the first difference being the difference between the transmit power used to send PRACH on SBFD symbols in 2-step RA and the transmit power used to send PRACH on non-SBFD symbols, and the second difference being the difference between the transmit power used to send PRACH on SBFD symbols and the transmit power used to send PRACH on non-SBFD symbols in 4-step RA.

[0244] For example, the expected value of the fifth target received power can be expressed as preamble Received Target Power#1, the expected value of the sixth target received power can be expressed as preamble Received Target Power#2, the fifth power ramping step can be expressed as power Ramping Step#1, the sixth power ramping step can be expressed as power Ramping Step#2, the first count can be expressed as counter#1, the second count can be expressed as counter#2, the fourth parameter can be expressed as delta, the third offset can be expressed as poweroffset#2, the first difference can be expressed as Poweroffset_SBFD#1, and the second difference can be expressed as Poweroffset_SBFD#2.

[0245] For example, the first power may be expressed as PCMAX_SBFD, the second power may be expressed as PCMAX_non_SBFD, and the seventh parameter may be expressed as PL.

[0246] In some embodiments, determining, based on the first parameter, the second parameter, the third parameter, the fourth parameter, and the fifth parameter, respectively, actual values ​​of target received powers for transmitting PRACH on SBFD symbols and non-SBFD symbols in 2-step RA and / or 4-step RA includes:

[0247] Based on the expected value of the fifth target received power, the fifth power ramping step size, the first counter, and the fourth parameter, the actual value of the target received power for sending the PRACH on the first time domain unit in the two-step RA is determined, i.e., TargetPower#1 = preamble Received TargetPower#1 + delta + (counter#1-1) × power RampingStep#1

[0248] Based on the expected value of the sixth target received power, the sixth power ramping step size, the second counter, the fourth parameter, and the third offset, the actual value of the target received power for sending the PRACH on the SBFD symbol in the four-step RA is determined, i.e., TargetPower#2 = preamble Received TargetPower#2 + delta + (counter#2 - 1) × power ramping step#2 + poweroffset#2

[0249] Determining, based on the actual value of the target received power, the sixth parameter, the seventh parameter, and / or the eighth parameter, the transmit power used to send the PRACH on the first time domain unit includes:

[0250] Based on the actual value of the target received power for sending PRACH on the first time domain unit in the 2-step RA, the first power, the seventh parameter, and the first difference, determine the transmit power used to send PRACH on the SBFD symbol in the 2-step access, that is, min{PCMAX_SBFD,TargetPower#1+PL+Poweroffset_SBFD#1}

[0251] Or, min{PCMAX_SBFD,TargetPower#1+PL}

[0252] Based on the actual value of the target received power for sending PRACH on the first time domain unit in the 2-step RA, the second power, the seventh parameter, and the first difference, determine the transmit power used to send PRACH on non-SBFD symbols in the 2-step RA, that is, min{PCMAX_non_SBFD,TargetPower#1+PL}

[0253] Or, min{PCMAX_non_SBFD,TargetPower#1+PL+Poweroffset_SBFD#1}

[0254] Based on the actual value of the target received power for sending PRACH on the first time domain unit in the 4-step RA, the first power, the seventh parameter, and the second difference, determine the transmit power used to send PRACH on the SBFD symbol in the 4-step access, that is, min{PCMAX_SBFD,TargetPower#2+PL+Poweroffset_SBFD#2}

[0255] Or, min{PCMAX_SBFD,TargetPower#2+PL}

[0256] Based on the actual value of the target received power for sending PRACH on the first time domain unit in the 4-step RA, the second power, the seventh parameter, and the second difference, determine the transmit power used to send PRACH on non-SBFD symbols in the 4-step access, that is, min{PCMAX_non_SBFD,TargetPower#2+PL}

[0257] Or, min{PCMAX_non_SBFD,TargetPower#2+PL+Poweroffset_SBFD#2}

[0258] In some embodiments, the first information further includes a sixth parameter, wherein:

[0259] The sixth parameter includes a first power, the first power is the maximum transmit power for sending PRACH on SBFD symbols, and a second power is a protocol default, the second power is the maximum transmit power for sending PRACH on non-SBFD symbols; or

[0260] The sixth parameter includes the second power, and the first power is the protocol default; or

[0261] The sixth parameter includes a first power and a second power, and the first power is different from the second power.

[0262] In other words, the first power PCMAX_SBFD is the maximum transmit power for sending PRACH on SBFD symbols, and the second power PCMA X_non_SBFD is the maximum transmit power for sending PRACH on non-SBFD symbols. The first power and the second power can be configured differently. For example, the first power can be configured, and the second power can be the protocol default, wherein the configured first power is different from the protocol default second power; or, the second power can be configured, and the first power is the protocol default, wherein the configured second power is different from the protocol default first power; or, both the first power and the second power can be configured, and the configured first power is different from the second power.

[0263] In some embodiments, the first type of parameters may be configured differently on SBFD symbols and non-SBFD symbols using the following method:

[0264] Method 1: The values ​​of the first type of parameters on SBFD symbols and non-SBFD symbols are configured as the first value and the second value respectively.

[0265] Method 2: The value of the first type of parameter on the non-SBFD symbol is configured as the first value, the first difference between the values ​​of the first type of parameter on the SBFD symbol and the non-SBFD symbol is configured, and the value of the first type of parameter on the SBFD symbol is determined to be the second value.

[0266] Optionally, in mode 2, the second value = the first value - the first difference;

[0267] Optionally, in method 2, the second value = the first value + the first difference;

[0268] Optionally, in method 1 and method 2, the first type parameter may be the first parameter;

[0269] Optionally, in Method 1 and Method 2, the first type parameter may be the second parameter;

[0270] Optionally, in method 1 and method 2, the first type of parameter may be the sixth parameter.

[0271] In some embodiments, the above-mentioned solution 1 and solution 2 may be applicable to PRACH without repetition (PRACH without repetition), and may also be applicable to PRACH with N repetitions (PRACH with repetition N), that is, PRACH is repeatedly transmitted N times.

[0272] In some embodiments, in a PRACH without repeated transmission, a third parameter is used to identify the number of times the PRACH is sent on the first time domain unit in a 2-step RA and / or a 4-step RA;

[0273] In some embodiments, in a PRACH with N repeated transmissions, the third parameter is used to identify the number of times a PRACH sample is sent on the first time domain unit in a 2-step RA and / or a 4-step RA, and each PRACH sample includes N repeated transmissions of PRACH.

[0274] Step 2103: The network device determines the transmit power used to transmit the PRACH in the first time domain unit.

[0275] In some embodiments, the network device may determine the transmit power used to transmit the PRACH in the first time domain unit.

[0276] Option 1

[0277] In some embodiments, in 2-step random access (RA) and / or 4-step RA, at least one of the first parameter and the second parameter differs between SBFD symbols and non-SBFD symbols. That is, at least one of the first parameter and the second parameter may be configured differently. The specific content of this solution is the same as the first terminal-side solution in step 2102 and is not further described here.

[0278] Option 2

[0279] In some embodiments, the first information further includes an eighth parameter, which is used to identify the difference between the transmit power used for sending the PRACH on SBFD symbols and the transmit power used for sending the PRACH on non-SBFD symbols. That is, the difference between the transmit power used for sending the PRACH on SBFD symbols and the transmit power used for sending the PRACH on non-SBFD symbols can be configured to achieve differentiated configuration of the transmit power on SBFD symbols and the transmit power used on non-SBFD symbols.

[0280] The specific content of this solution is the same as step 2102 terminal side solution 2, and will not be repeated here.

[0281] In the embodiment of the present disclosure, the execution order of step 2103 and step 2102 is not limited, and the execution order of step 2103 and step 2101 is not limited.

[0282] The method involved in the embodiment of the present disclosure may include at least one of steps 2101 to 2103. For example, step 2102 may be implemented as an independent embodiment, and steps 2101+2102+2103 may be implemented as independent embodiments, but are not limited thereto.

[0283] FIG3 is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3 , the present disclosure embodiment relates to a communication method for a terminal, the method comprising:

[0284] Step 3101: Receive first information.

[0285] The optional implementation of step 3101 can refer to the optional implementation of step 2101 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0286] In some embodiments, the terminal 101 receives the first information sent by the network device 102, but is not limited thereto and may also receive the first information sent by other entities.

[0287] In some embodiments, terminal 101 obtains first information specified by a protocol.

[0288] In some embodiments, terminal 101 obtains the first information from upper layer(s).

[0289] In some embodiments, the terminal 101 performs processing to obtain the first information.

[0290] Step 3102: Determine the transmit power used to transmit the PRACH in the first time domain unit.

[0291] The optional implementation of step 3102 can refer to the optional implementation of step 2102 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0292] FIG4 is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4 , the embodiment of the present disclosure relates to a communication method for a network device, the method comprising:

[0293] Step 4101: Send the first message.

[0294] The optional implementation of step 4101 can refer to the optional implementation of step 2101 in Figure 2, step 3101 in Figure 3, and other related parts in the embodiments involved in Figures 2 and 3, which will not be repeated here.

[0295] In some embodiments, terminal 101 may receive first information.

[0296] In some embodiments, the network device 102 may send the first information to the terminal 101 , but is not limited thereto. The network device 102 may also send the first information to other entities.

[0297] Step 4102: Determine the transmit power used to transmit the PRACH in the first time domain unit.

[0298] The optional implementation of step 4102 can refer to the optional implementation of step 2103 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0299] Figure 5 is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in Figure 5, the embodiment of the present disclosure relates to a communication method for a communication system including a terminal and a network device. The method includes:

[0300] Step 5101: The network device sends first information to the terminal.

[0301] The optional implementation of step 5101 can refer to the optional implementation of step 2101 in Figure 2, step 3101 in Figure 3, step 4101 in Figure 4, and other related parts in the embodiments involved in Figures 2, 3, and 4, which will not be repeated here.

[0302] Step 5102: The network device and / or the terminal determines the transmit power used to transmit the PRACH in the first time domain unit.

[0303] The optional implementation of step 5101 can refer to the optional implementation of steps 2102 and 2103 in Figure 2, step 3102 in Figure 3, step 4102 in Figure 4, and other related parts in the embodiments involved in Figures 2, 3, and 4, which will not be repeated here.

[0304] The following is an exemplary introduction to the above method.

[0305] The method shown in the embodiment of the present disclosure relates to a method for determining PRACH transmission power.

[0306] Subband full duplex-aware user equipment (SBFD aware UE) can determine the transmission power of the PRACH on SBFD and nonSBFD symbols by the following method.

[0307] Solution 1: In 4-step RA and / or 2-step RA, configure at least one of the parameters, preambleReceivedTargetPower and powerRampingStep, differently for SBFD and non-SBFD symbols. Specifically, the following configuration is performed:

[0308] 2-step RA: preambleReceivedTargetPower#1_1, preambleReceivedTargetPower#1_2, powerRampingStep#1_1, powerRampingStep#1_2 in SBFD and non-SBFD symbols respectively.

[0309] 4-step RA: preambleReceivedTargetPower#2_1, preambleReceivedTargetPower#2_2, powerRampingStep#2_1, powerRampingStep#2_2 in SBFD and non-SBFD symbols respectively.

[0310] Method 1. In 2-step RA and / or 4-step RA, the PREAMBLE_POWER_RAMPING_COUNTER of PRACH transmissions on SBFD and non-SBFD symbols is jointly counted, denoted as counter#1 and counter#2 in 2-step RA and 4-step RA, respectively.

[0311] Determine the PREAMBLE_RECEIVED_TARGET_POWER of the 2-step RA on the SBFD and non-SBFD symbols, denoted as TargetPower#1_1 and TargetPower#1_2, respectively. Specifically:

[0312] Determine TargetPower#1_1 on the SBFD symbol based on preambleReceivedTargetPower#1_1, delta, counter#1, and powerRampingStep#1_1;

[0313] Determine TargetPower#1_2 on non-SBFD symbols based on preambleReceivedTargetPower#1_2, delta, counter#1, and powerRampingStep#1_2.

[0314] Specifically:

[0315] SBFD symbol: TargetPower#1_1=preamble Received Target Power#1_1+delta+(counter#1-1)×power Ramping Step#1_1

[0316] non-SBFD symbol: TargetPower#1_2=preamble Received Target Power#1_2+delta+(counter#1-1)×power Ramping Step#1_2

[0317] Determine the PREAMBLE_RECEIVED_TARGET_POWER of the 4-step RA on the SBFD and non-SBFD symbols, denoted as TargetPower#2_1 and TargetPower#2_2, respectively. Specifically:

[0318] Determine TargetPower#2_1 on the SBFD symbol based on preambleReceivedTargetPower#2_1, delta, counter#2, powerRampingStep#2_1, and poweroffset#2_1;

[0319] Determine TargetPower#2_2 on the SBFD symbol based on preambleReceivedTargetPower#2_2, delta, counter#2, powerRampingStep#2_2, and poweroffset#2_2.

[0320] Specifically:

[0321] SBFD symbol: TargetPower#2_1=preamble Received Target Power#2_1+delta+(counter#2-1)×power Ramping Step#2_1+poweroffset#2_1

[0322] non-SBFD symbol: TargetPower#2_2=preamble Received Target Power#2_2+delta+(counter#2-1)×power Ramping Step#2_2+poweroffset#2_2

[0323] Among them, poweroffset#2_1 and poweroffset#2_2 are POWER_OFFSET_2STEP_RA on 2-step RA switching to 4-step RA, SBFD and non-SBFD symbols respectively.

[0324] Specifically:

[0325] Define the values ​​of value#1~4 as follows: value#1=(counter#1–1)×(power Ramping Step#1_1–power Ramping Step#2_1) value#2=(counter#1–1)×(power Ramping Step#1_2–power Ramping Step#2_2) value#3={value#1,value#2}

[0326] Indicates that the value of value#3 is one of value#1 and value#2. value#4 = (counter#1_4–1)×(power Ramping Step#1_1–power Ramping Step#2_1) + (counter#1_5–1)×(power Ramping Step#1_2–power Ramping Step#2_2)

[0327] Option 1: poweroffset#2_1=value#1 poweroffset#2_2=value#2

[0328] Option 2: poweroffset#2_1=poweroffset#2_2=value#3

[0329] Option 3: poweroffset#2_1=poweroffset#2_2=value#4

[0330] Among them, counter#1 is the joint count of PREAMBLE_POWER_RAMPING_COUNTER of PRACH transmission on SBFD and non-SBFD symbols in 2-step RA before switching to 4-step RA; counter#1_4 and counter#1_5 are the counts on SBFD and non-SBFD symbols in counter#1, respectively, and counter#1 = counter#1_4 + counter#1_5.

[0331] Delta is a power offset value related to the Preamble format, which is a real number and can be determined according to the existing protocol.

[0332] Method 2. In 2-step RA and / or 4-step RA, the PREAMBLE_POWER_RAMPING_COUNTER of PRACH transmissions on SBFD and non-SBFD symbols are counted separately, denoted as counter#1_1 and counter#1_2 in 2-step RA, and as counter#2_1 and counter#2_2 in 4-step RA.

[0333] Determine the PREAMBLE_RECEIVED_TARGET_POWER of the 2-step RA on the SBFD and non-SBFD symbols, denoted as TargetPower#1_1 and TargetPower#1_2, respectively. Specifically:

[0334] Determine TargetPower#1_1 on the SBFD symbol based on preambleReceivedTargetPower#1_1, delta, counter#1_1, and powerRampingStep#1_1;

[0335] Determine TargetPower#1_2 on non-SBFD symbols based on preambleReceivedTargetPower#1_2, delta, counter#1_2, and powerRampingStep#1_2.

[0336] Specifically:

[0337] SBFD symbol: TargetPower#1_1= preamble Received Target Power#1_1+delta+(counter#1_1–1)×power Ramping Step#1_1

[0338] non-SBFD symbol: TargetPower#1_2= preamble Received Target Power#1_2+delta+(counter#1_2–1)×power Ramping Step#1_2

[0339] Determine the PREAMBLE_RECEIVED_TARGET_POWER of the 4-step RA on the SBFD and non-SBFD symbols, denoted as TargetPower#2_1 and TargetPower#2_2, respectively. Specifically:

[0340] Determine TargetPower#2_1 on the SBFD symbol based on preambleReceivedTargetPower#2_1, delta, counter#2_1, powerRampingStep#2_1, and poweroffset#2_1;

[0341] Determine TargetPower#2_2 on the SBFD symbol based on preambleReceivedTargetPower#2_2, delta, counter#2_2, powerRampingStep#2_2, and poweroffset#2_2.

[0342] Specifically:

[0343] SBFD symbol: TargetPower#2_1= preamble Received Target Power#2_1+delta+(counter#2_1–1)×power Ramping Step#2_1+ poweroffset#2_1

[0344] non-SBFD symbol: TargetPower#2_2= preamble Received Target Power#2_2+delta+(counter#2_2–1)×power Ramping Step#2_2+ poweroffset#2_2

[0345] Among them, poweroffset#2_1 and poweroffset#2_2 are POWER_OFFSET_2STEP_RA for switching from 2-step RA to 4-step RA, SBFD and non-SBFD symbols respectively.

[0346] Specifically:

[0347] SBFD symbol: poweroffset#2_1=(counter#1_1–1)×(preamble Received Target Power#1_1 -preamble Received Target Power#2_1)

[0348] Non-SBFD symbol: poweroffset#2_2=(counter#1_2–1)×(preamble Received Target Power#1_2 -preamble Received Target Power#2_2)

[0349] Among them, counter#1_1 and counter#1_2 are the PREAMBLE_POWER_RAMPING_COUNTER of 2-step RA on SBFD and non-SBFD symbols before switching to 4-step RA. If 2-step RA is not performed before 4-step RA, poweroffset#2_1 and poweroffset#2_2 are 0.

[0350] Wherein, delta is the power offset value related to the Preamble format, which is a real number.

[0351] In the above scheme 1, the PRACH transmit power of 2-step RA on SBFD and non-SBFD symbols is min{PCMAX_SBFD, TargetPower#1_1+PL}, min{PCMAX_non_SBFD, TargetPower#1_2+PL} respectively;

[0352] The PRACH transmit power in 4-step RA on SBFD and non-SBFD symbols is min{PCMAX_SBFD, TargetPower#2_1+PL} and min{PCMAX_non_SBFD, TargetPower#2_2+PL}, respectively.

[0353] Solution 2: In 4-step RA and / or 2-step RA, a new parameter Poweroffset_SBFD is added to indicate the difference in PRACH transmit power between SBFD and non-SBFD symbols. Specifically, it includes:

[0354] In 2-step RA, the preambleReceivedTargetPower and powerRampingStep configurations are the same in SBFD and non-SBFD symbols, denoted as preambleReceivedTargetPower#1 and powerRampingStep#1;

[0355] In 4-step RA, the preambleReceivedTargetPower and powerRampingStep configurations are the same in SBFD and non-SBFD symbols, expressed as preambleReceivedTargetPower#2 and powerRampingStep#2. Poweroffset_SBFD = power_SBFD – power_non_SBFD

[0356] Or, Poweroffset_SBFD=power_non_SBFD–power_SBFD

[0357] In 2-step RA and 4-step RA, the value of Poweroffset_SBFD may be different, represented as Poweroffset_SBFD#1 and Poweroffset_SBFD#2.

[0358] In 2-step RA and 4-step RA, the PREAMBLE_POWER_RAMPING_COUNTER for PRACH transmissions on SBFD and non-SBFD symbols is jointly counted, denoted as counter#1 and counter#2 in 2-step RA and 4-step RA, respectively.

[0359] The PREAMBLE_RECEIVED_TARGET_POWER of the 2-step RA is the same on both SBFD and non-SBFD symbols, denoted as TargetPower#1. TargetPower#1 can be determined based on preambleReceivedTargetPower#1, delta, counter#1, and powerRampingStep#1. TargetPower#1 = preambleReceivedTargetPower#1+delta+(counter#1_1) × powerRampingStep#1

[0360] The PREAMBLE_RECEIVED_TARGET_POWER of the 4-step RA is the same on both SBFD and non-SBFD symbols, denoted as TargetPower#2. TargetPower#2 can be determined based on preambleReceivedTargetPower#2, delta, counter#2, powerRampingStep#2, and poweroffset#2. TargetPower#2 = preambleReceivedTargetPower#2 + delta + (counter#2_1) × powerRampingStep#2 + poweroffset#2

[0361] poweroffset#2 is POWER_OFFSET_2STEP_RA when switching from 2-step RA to 4-step RA. It has the same value for SBFD and non-SBFD symbols. poweroffset#2 = (counter#1–1) × (power ramping step#1–power ramping step#2)

[0362] Where counter#1 is the combined count of PREAMBLE_POWER_RAMPING_COUNTER of 2-step RA transmitted on PRACH in SBFD and non-SBFD symbols before switching to 4-step RA. If 2-step RA is not performed before 4-step RA, poweroffset#2 is 0.

[0363] Wherein, delta is the power offset value related to the Preamble format, which is a real number.

[0364] In solution 2, the PRACH transmit power for 2-step RA on SBFD and non-SBFD symbols is:

[0365] Option 1: min{PCMAX_SBFD,TargetPower#1+PL+Poweroffset_SBFD#1} min{PCMAX_non_SBFD,TargetPower#1+PL}

[0366] Option 2: min{PCMAX_SBFD,TargetPower#1+PL} min{PCMAX_non_SBFD,TargetPower#1+PL+Poweroffset_SBFD#1}

[0367] The PRACH transmit power for 4-step RA on SBFD and non-SBFD symbols is:

[0368] Option 1: min{PCMAX_SBFD,TargetPower#2+PL+Poweroffset_SBFD#2} min{PCMAX_non_SBFD,TargetPower#2+PL}

[0369] Option 2: min{PCMAX_SBFD,TargetPower#2+PL} min{PCMAX_non_SBFD,TargetPower#2+PL+Poweroffset_SBFD#2}

[0370] In Option 1 and Option 2, PCMAX_SBFD and PCMAX_non_SBFD represent the maximum transmit power allowed by PRACH on SBFD and non-SBFD symbols, respectively. The values ​​can be the same or different. If the values ​​are different, differentiated configurations can be performed. PL is the value of path loss.

[0371] In Option 1 and Option 2, the maximum transmit power allowed by PRACH on SBFD and non-SBFD symbols is optionally configured differently, namely PCMAX_SBFD and PCMAX_non_SBFD, and the values ​​can be the same or different. If the values ​​are different, they can be configured differently.

[0372] Differentiated configuration of the first parameter on SBFD and non-SBFD symbols may include:

[0373] Option 1: The first parameter of SBFD and non-SBFD symbols is configured by higher layers or by the protocol default, and is set to first parameter #1_1. The first parameter of non-SBFD symbols is configured by higher layers or by the protocol default, and is set to first parameter #1_2.

[0374] Option 2: The higher-level configuration or protocol defaults the first parameter on the non-SBFD symbol to the value of first parameter #1_1. The higher-level configuration or protocol defaults the difference between the first parameters on the SBFD and non-SBFD symbols to the first difference, and determines the value of the first parameter on the SBFD symbol to be first parameter #1_2.

[0375] Option 2-1: First parameter #1_2 = first parameter #1_1 - first difference

[0376] Option 2-2: First parameter #1_2 = first parameter #1_1 + first difference

[0377] The first parameter is preambleReceivedTargetPower or powerRampingStep or PCMAX, and the first difference may have different values ​​in different parameters.

[0378] Solutions 1 and 2 can be used for PRACH without repetition (PRACH without repeated transmission) and PRACH with repetition N (PRACH with N repeated transmissions):

[0379] In some embodiments, in a PRACH without repeated transmission, PREAMBLE_POWER_RAMPING_COUNTER is used to identify the number of times the PRACH is sent on the first time domain unit in a 2-step RA and / or a 4-step RA;

[0380] In some embodiments, in a PRACH with N repeated transmissions, PREAMBLE_POWER_RAMPING_COUNTER is used to identify the number of times a PRACH sample is sent on the first time domain unit in a 2-step RA and / or a 4-step RA, and each PRACH sample includes a PRACH with N repeated transmissions.

[0381] The base station determines the transmission power of the PRACH on SBFD and non-SBFD symbols by the following method.

[0382] Solution 1: In 4-step RA and / or 2-step RA, at least one of the parameters preambleReceivedTargetPower and powerRampingStep is configured differently on SBFD and non-SBFD symbols.

[0383] The specific method is the same as the terminal side solution 1 and will not be repeated here.

[0384] Solution 2: In 4-step RA and / or 2-step RA, add the parameter Poweroffset_SBFD to indicate the difference in PRACH transmission power between SBFD and non-SBFD symbols.

[0385] The specific method is the same as the terminal side solution 2, so it will not be repeated here.

[0386] A schematic diagram of the overall process of the method proposed in this example is shown in Figure 6:

[0387] Step 1: Send the first information, the first information includes the power configuration information of PRACH.

[0388] The first information includes PRACH power configuration information of the SBFD aware UE.

[0389] Optionally, at least one parameter among preambleReceivedTargetPower and powerRampingStep in the first information is configured differently.

[0390] Optionally, the maximum transmit power allowed by PRACH on SBFD and non-SBFD symbols in the first information is configured differently.

[0391] Optionally, Poweroffset_SBFD is added to the first information, indicating the difference between the PRACH transmission power on SBFD and non-SBFD symbols.

[0392] Step 2: Determine the transmit power of the PRACH on the SBFD and non-SBFD symbols based on the first information.

[0393] According to the first information, the SBFD aware UE uses solution one and / or solution two to determine the transmit power of the PRACH on SBFD and non-SBFD symbols.

[0394] In summary, the method proposed in this example can differentially configure the power parameters of the PRACH on SBFD and non-SBFD symbols, enabling differentiated PRACH signal transmission power on SBFD and non-SBFD symbols.

[0395] Figure 7a is a schematic diagram of the structure of terminal 101 according to an embodiment of the present disclosure. As shown in Figure 7a, terminal 101 includes a transceiver module 7101 configured to receive first information sent by a network device, the first information being used to configure a physical random access channel (PRACH); optionally, the transceiver module is configured to execute at least one of the transceiver-related steps (such as, but not limited to, step 2101) executed by terminal 101 in any of the above methods, which will not be further described herein.

[0396] As shown in Figure 7a, the terminal 101 also includes: a processing module 7102, which is used to determine the transmission power used to send PRACH on the first time domain unit based on the first information, and the first time domain unit includes sub-band full-duplex SBFD symbols and non-SBFD symbols; optionally, the above-mentioned transceiver module is used to execute at least one of the transceiver-related steps (such as step 2102, but not limited to this) performed by the terminal 101 in any of the above methods, which will not be repeated here.

[0397] Figure 7b is a schematic diagram of the structure of network device 102 according to an embodiment of the present disclosure. As shown in Figure 7b, network device 101 includes a transceiver module 7201 configured to send first information to a terminal, where the first information is used to configure a physical random access channel (PRACH); optionally, the transceiver module is configured to execute at least one of the transceiver-related steps (such as, but not limited to, step 2101) executed by network device 102 in any of the above methods, which will not be further described here.

[0398] As shown in Figure 7b, the network device 102 also includes: a processing module 7202, which is used to determine the transmission power used to send PRACH on the first time domain unit based on the first information, and the first time domain unit includes sub-band full-duplex SBFD symbols and non-SBFD symbols; optionally, the above-mentioned determination module is used to execute at least one of the steps related to the processing performed by the network device 102 in any of the above methods (such as step 2103, but not limited to this), which will not be repeated here.

[0399] As shown in Figure 8a, the communication device 8100 includes one or more processors 8101. The processor 8101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control the communication device (such as a base station, baseband chip, terminal device, terminal device chip, DU or CU, etc.), execute programs, and process program data. The processor 8101 is used to call instructions to enable the communication device 8100 to perform any of the above methods.

[0400] In some embodiments, the communication device 8100 further includes one or more memories 8102 for storing instructions. Optionally, all or part of the memories 8102 may be located outside the communication device 8100.

[0401] In some embodiments, the communication device 8100 further includes one or more transceivers 8103. When the communication device 8100 includes one or more transceivers 8103, the communication steps such as sending and receiving in the above method are performed by the transceiver 8103, and the other steps are performed by the processor 8101.

[0402] In some embodiments, a transceiver may include a receiver and a transmitter, which may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, and transceiver circuit may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0403] Optionally, the communication device 8100 further includes one or more interface circuits 8104, which are connected to the memory 8102. The interface circuits 8104 can be used to receive signals from the memory 8102 or other devices, and can be used to send signals to the memory 8102 or other devices. For example, the interface circuits 8104 can read instructions stored in the memory 8102 and send the instructions to the processor 8101.

[0404] The communication device 8100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by FIG. 8a. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0405] FIG8b is a schematic diagram of the structure of a chip 8200 according to an embodiment of the present disclosure. If the communication device 8100 can be a chip or a chip system, reference can be made to the schematic diagram of the structure of the chip 8200 shown in FIG8b, but the present disclosure is not limited thereto.

[0406] The chip 8200 includes one or more processors 8201, and the processor 8201 is used to call instructions so that the chip 8200 executes any of the above methods.

[0407] In some embodiments, chip 8200 further includes one or more interface circuits 8202, which are connected to memory 8203. Interface circuit 8202 can be used to receive signals from memory 8203 or other devices, and can be used to send signals to memory 8203 or other devices. For example, interface circuit 8202 can read instructions stored in memory 8203 and send the instructions to processor 8201. Optionally, the terms interface circuit, interface, transceiver pin, and transceiver are interchangeable.

[0408] In some embodiments, the chip 8200 further includes one or more memories 8203 for storing instructions. Alternatively, all or part of the memories 8203 may be outside the chip 8200.

[0409] The present disclosure also proposes a storage medium having instructions stored thereon, which, when executed on the communication device 8100, causes the communication device 8100 to execute any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto, and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto, and may also be a temporary storage medium.

[0410] The present disclosure also provides a program product, which, when executed by the communication device 8100, enables the communication device 8100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0411] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

[0412] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented using software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present disclosure are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can 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 program can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. 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)).

[0413] The correspondences shown in the tables of the present disclosure can be configured or predefined. The values ​​of the information in each table are merely examples and can be configured to other values, which are not limited by the present disclosure. When configuring the correspondences between information and parameters, it is not necessarily required to configure all the correspondences shown in each table. For example, in the tables of the present disclosure, the correspondences shown in certain rows may not be configured. For another example, appropriate deformation adjustments can be made based on the above tables, such as splitting, merging, etc. The names of the parameters shown in the titles of the above tables may also adopt other names that can be understood by the communication device, and the values ​​or representations of the parameters may also adopt other values ​​or representations that can be understood by the communication device. When implementing the above tables, other data structures may also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables or hash tables, etc.

[0414] The predefined in the present disclosure may be understood as defined, predefined, stored, pre-stored, pre-negotiated, pre-configured, solidified, or pre-burned.

[0415] Those skilled 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. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this disclosure.

[0416] Those skilled in the art will 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.

[0417] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: The method is executed by a terminal, and includes: receiving first information sent by a network device, where the first information is used to configure a physical random access channel (PRACH); Based on the first information, a transmit power used to transmit the PRACH on a first time domain unit is determined, where the first time domain unit includes a sub-band full-duplex SBFD symbol and a non-SBFD symbol.

2. The method according to claim 1, characterized in that The first information includes a first parameter and a second parameter, the first parameter is used to identify an expected value of a target received power for sending a PRACH, and the second parameter is used to identify a power ramping step for sending a PRACH.

3. The method according to claim 2, characterized in that The determining, based on the first information, a transmit power used for sending the PRACH in the first time domain unit includes: Determine at least one of a third parameter, a fourth parameter, a fifth parameter, a sixth parameter, a seventh parameter, and an eighth parameter, wherein the third parameter is used to identify the number of times a PRACH is sent on the first time domain unit in 2-step RA and / or 4-step RA, the fourth parameter is used to identify a power offset value related to a preamble format, the fifth parameter is used to identify a power offset value for switching from 2-step access to 4-step access, the sixth parameter is used to identify the maximum transmit power of the terminal, the seventh parameter is used to identify a path loss (PL) of the terminal, and the eighth parameter is used to identify a difference between a transmit power used to send a PRACH on an SBFD symbol and a transmit power used to send a PRACH on a non-SBFD symbol; Determine, based on the first parameter, the second parameter, the third parameter, the fourth parameter, and the fifth parameter, actual values ​​of target received powers for transmitting PRACH on SBFD symbols and non-SBFD symbols in 2-step RA and / or 4-step RA respectively; Based on the actual value of the target received power, the sixth parameter, the seventh parameter and / or the eighth parameter, a transmit power used to send the PRACH on the first time domain unit is determined.

4. The method according to claim 3, characterized in that In 2-step random access (RA) and / or 4-step random access (RA), at least one of the first parameter and the second parameter is different between the SBFD symbol and the non-SBFD symbol.

5. The method according to claim 4, characterized in that The first parameter includes at least one of the following: an expected value of a first target received power of a PRACH sent on an SBFD symbol in a 2-step RA; an expected value of a second target received power of a PRACH sent on a non-SBFD symbol in a 2-step RA; an expected value of a third target received power of a PRACH sent on an SBFD symbol in a 4-step RA; and an expected value of a fourth target received power of a PRACH sent on a non-SBFD symbol in a 4-step RA. The second parameter includes at least one of the following: a first power ramping step size for sending PRACH on SBFD symbols in 2-step RA; a second power ramping step size for sending PRACH on non-SBFD symbols in 2-step RA; a third power ramping step size for sending PRACH on SBFD symbols in 4-step RA; and a fourth power ramping step size for sending PRACH on non-SBFD symbols in 4-step RA. The third parameter includes a first count and a second count, the first count being the total number of times the PRACH is sent on SBFD symbols and non-SBFD symbols in a 2-step RA, and the second count being the total number of times the PRACH is sent on SBFD symbols and non-SBFD symbols in a 4-step RA; The fifth parameter includes a first offset and a second offset, the first offset being a power offset value for sending PRACH on SBFD symbols when switching from 2-step RA to 4-step RA, and the second offset being a power offset value for sending PRACH on non-SBFD symbols when switching from 2-step RA to 4-step RA.

6. The method according to claim 5, characterized in that The determining, based on the first parameter, the second parameter, the third parameter, the fourth parameter, and the fifth parameter, respectively, actual values ​​of target received powers for sending PRACH on SBFD symbols and non-SBFD symbols in 2-step RA and / or 4-step RA includes: Determine, based on the expected value of the first target received power, the first power ramping step size, the first count, and the fourth parameter, an actual value of the target received power for sending the PRACH on the SBFD symbol in the 2-step RA; Determining an actual value of the target received power for sending the PRACH on non-SBFD symbols in a 2-step RA based on the expected value of the second target received power, the second power ramping step size, the first count, and the fourth parameter; Determine, based on the expected value of the third target received power, the third power ramping step size, the second count, the fourth parameter, and the first offset, an actual value of the target received power for sending the PRACH on the SBFD symbol in the four-step RA; Based on the expected value of the fourth target received power, the fourth power ramping step, the second count, the fourth parameter, and the second offset, an actual value of the target received power for sending PRACH on non-SBFD symbols in the 4-step RA is determined.

7. The method according to claim 4, characterized in that The first parameter includes at least one of the following: an expected value of a first target received power of a PRACH sent on an SBFD symbol in a 2-step RA; an expected value of a second target received power of a PRACH sent on a non-SBFD symbol in a 2-step RA; an expected value of a third target received power of a PRACH sent on an SBFD symbol in a 4-step RA; and an expected value of a fourth target received power of a PRACH sent on a non-SBFD symbol in a 4-step RA. The second parameter includes at least one of the following: a first power ramping step size for sending PRACH on SBFD symbols in 2-step RA; a second power ramping step size for sending PRACH on non-SBFD symbols in 2-step RA; a third power ramping step size for sending PRACH on SBFD symbols in 4-step RA; and a fourth power ramping step size for sending PRACH on non-SBFD symbols in 4-step RA. The third parameter includes a third count, a fourth count, a fifth count, and a sixth count, wherein the third count is the number of times the PRACH is sent on the SBFD symbol in the 2-step RA, the fourth count is the number of times the PRACH is sent on the non-SBFD symbol in the 2-step RA, the fifth count is the number of times the PRACH is sent on the SBFD symbol in the 4-step RA, and the sixth count is the number of times the PRACH is sent on the non-SBFD symbol in the 4-step RA; The fifth parameter includes a first offset and a second offset, the first offset being a power offset value for sending PRACH on SBFD symbols when switching from 2-step RA to 4-step RA, and the second offset being a power offset value for sending PRACH on non-SBFD symbols when switching from 2-step RA to 4-step RA.

8. The method according to claim 7, characterized in that The determining, based on the first parameter, the second parameter, the third parameter, the fourth parameter, and the fifth parameter, respectively, actual values ​​of target received powers for sending PRACH on SBFD symbols and non-SBFD symbols in 2-step RA and / or 4-step RA includes: Determine, based on the expected value of the first target received power, the first power ramping step size, the third count, and the fourth parameter, an actual value of the target received power for sending the PRACH on the SBFD symbol in the 2-step RA; Determining an actual value of the target received power for sending the PRACH on non-SBFD symbols in a 2-step RA based on the expected value of the second target received power, the second power ramping step size, the fourth count, and the fourth parameter; Determine, based on the expected value of the third target received power, the third power ramping step size, the fifth count, the fourth parameter, and the first offset, an actual value of the target received power for sending the PRACH on the SBFD symbol in the four-step RA; Based on the expected value of the fourth target received power, the fourth power ramping step, the sixth count, the fourth parameter, and the second offset, an actual value of the target received power for sending PRACH on non-SBFD symbols in the 4-step RA is determined.

9. The method according to claim 6 or 8, characterized in that The sixth parameter includes a first power and a second power, the first power being the maximum transmit power for sending the PRACH on the SBFD symbol, and the second power being the maximum transmit power for sending the PRACH on the non-SBFD symbol; The determining, based on the actual value of the target received power, the sixth parameter, and the seventh parameter, of the transmit power used to send the PRACH on the first time domain unit includes: Determining a transmit power used for transmitting the PRACH on the SBFD symbol in the two-step RA based on an actual value of the target receive power for transmitting the PRACH on the SBFD symbol in the two-step RA, the first power, and the seventh parameter; Determining a transmit power for transmitting the PRACH on non-SBFD symbols in two-step RA based on an actual value of a target receive power for transmitting the PRACH on non-SBFD symbols in two-step RA, the second power, and the seventh parameter; Determining a transmit power used for sending the PRACH on the SBFD symbol in the four-step RA based on an actual value of the target receive power for sending the PRACH on the SBFD symbol in the four-step RA, the first power, and the seventh parameter; The transmit power used to send PRACH on non-SBFD symbols in 4-step RA is determined based on the actual value of the target receive power for sending PRACH on non-SBFD symbols in 4-step RA, the second power, and the seventh parameter.

10. The method according to claim 3, characterized in that The first information further includes an eighth parameter, where the eighth parameter is used to identify a difference between a transmit power used to send the PRACH on an SBFD symbol and a transmit power used to send the PRACH on a non-SBFD symbol.

11. The method according to claim 10, characterized in that The first parameter includes at least one of the following: in a 2-step RA, an expected value of a fifth target received power for sending a PRACH on the first time domain unit; in a 4-step RA, an expected value of a sixth target received power for sending a PRACH on the first time domain unit; The second parameter includes at least one of the following: a fifth power ramp for sending PRACH on the first time domain unit in a 2-step RA; Slope step size; in a 4-step RA, a sixth power ramping step size for sending PRACH on the first time domain unit; The third parameter includes a first count and a second count, the first count being the total number of times the PRACH is sent on SBFD symbols and non-SBFD symbols in a 2-step RA, and the second count being the total number of times the PRACH is sent on SBFD symbols and non-SBFD symbols in a 4-step RA; The fifth parameter includes a third offset, where the third offset is a power offset value for sending the PRACH on the first time domain unit when switching from 2-step RA to 4-step RA.

12. The method according to claim 11, characterized in that The determining, based on the first parameter, the second parameter, the third parameter, the fourth parameter, and the fifth parameter, respectively, actual values ​​of target received powers for sending PRACH on SBFD symbols and non-SBFD symbols in 2-step RA and / or 4-step RA includes: Determining an actual value of the target received power for sending the PRACH on the first time domain unit in a 2-step RA based on the expected value of the fifth target received power, the fifth power ramping step size, the first count, and the fourth parameter; Based on the expected value of the sixth target received power, the sixth power ramping step, the second count, the fourth parameter, and the third offset, an actual value of the target received power for sending PRACH on the SBFD symbol in the 4-step RA is determined.

13. The method according to claim 12, characterized in that The sixth parameter includes a first power and a second power, the first power being the maximum transmit power for sending the PRACH on the SBFD symbol, and the second power being the maximum transmit power for sending the PRACH on the non-SBFD symbol; The eighth parameter includes a first difference and a second difference, the first difference being the difference between the transmit power used to send the PRACH on the SBFD symbol and the transmit power used to send the PRACH on the non-SBFD symbol in the 2-step RA, and the second difference being the difference between the transmit power used to send the PRACH on the SBFD symbol and the transmit power used to send the PRACH on the non-SBFD symbol in the 4-step RA. The determining, based on the actual value of the target received power, the sixth parameter, the seventh parameter, and / or the eighth parameter, of the transmit power used to send the PRACH on the first time domain unit includes: Determining a transmit power for sending the PRACH on the SBFD symbol in the two-step access based on an actual value of the target received power for sending the PRACH on the first time domain unit in the two-step RA, the first power, the seventh parameter, and the first difference; Determining a transmit power for transmitting the PRACH on non-SBFD symbols in two-step access based on an actual value of the target received power for transmitting the PRACH on the first time domain unit in two-step RA, the second power, the seventh parameter, and the first difference; Determining a transmit power for sending the PRACH on the SBFD symbol in the four-step access based on an actual value of the target received power for sending the PRACH on the first time domain unit in the four-step RA, the first power, the seventh parameter, and the second difference; Based on the actual value of the target received power for sending PRACH on the first time domain unit in the 4-step RA, the second power, the seventh parameter, and the second difference, the transmit power used for sending PRACH on non-SBFD symbols in the 4-step access is determined.

14. The method according to any one of claims 3 to 13, characterized in that The first information also includes the sixth parameter, wherein, The sixth parameter includes a first power, where the first power is the maximum transmit power for sending a PRACH on an SBFD symbol, and a second power is a protocol default, where the second power is the maximum transmit power for sending a PRACH on a non-SBFD symbol; or The sixth parameter includes the second power, and the first power is a protocol default; or The sixth parameter includes the first power and the second power, and the first power is different from the second power.

15. A communication method, characterized in that: The method is performed by a network device, and includes: Sending first information to the terminal, where the first information is used to configure a physical random access channel PRACH; Based on the first information, a transmit power used to transmit the PRACH on a first time domain unit is determined, where the first time domain unit includes a sub-band full-duplex SBFD symbol and a non-SBFD symbol.

16. The method according to claim 15, characterized in that The first information includes a first parameter and a second parameter, the first parameter is used to identify an expected value of a target received power for sending a PRACH, and the second parameter is used to identify a power ramping step for sending a PRACH.

17. The method according to claim 16, characterized in that The determining, based on the first information, a transmit power used for sending the PRACH in the first time domain unit includes: Determine at least one of the third parameter, the fourth parameter, the fifth parameter, the sixth parameter, the seventh parameter, and the eighth parameter, wherein the third parameter used to identify the number of times PRACH is sent on the first time domain unit in 2-step RA and / or 4-step RA, the fourth parameter is used to identify the power offset value related to the preamble code format, the fifth parameter is used to identify the power offset value for switching from 2-step access to 4-step access, the sixth parameter is used to identify the maximum transmit power of the terminal, the seventh parameter is used to identify the path loss of the terminal, and the eighth parameter is used to identify the difference between the transmit power used to send PRACH on SBFD symbols and the transmit power used to send PRACH on non-SBFD symbols; Determine, based on the first parameter, the second parameter, the third parameter, the fourth parameter, and the fifth parameter, actual values ​​of target received powers for transmitting PRACH on SBFD symbols and non-SBFD symbols in 2-step RA and / or 4-step RA respectively; Based on the actual value of the target received power, the sixth parameter, the seventh parameter and / or the eighth parameter, a transmit power used to send the PRACH on the first time domain unit is determined.

18. The method according to claim 17, characterized in that In 2-step random access (RA) and / or 4-step random access (RA), at least one of the first parameter and the second parameter is different between the SBFD symbol and the non-SBFD symbol.

19. The method according to claim 18, characterized in that The first parameter includes at least one of the following: an expected value of a first target received power of a PRACH sent on an SBFD symbol in a 2-step RA; an expected value of a second target received power of a PRACH sent on a non-SBFD symbol in a 2-step RA; an expected value of a third target received power of a PRACH sent on an SBFD symbol in a 4-step RA; and an expected value of a fourth target received power of a PRACH sent on a non-SBFD symbol in a 4-step RA. The second parameter includes at least one of the following: a first power ramping step size for sending PRACH on SBFD symbols in 2-step RA; a second power ramping step size for sending PRACH on non-SBFD symbols in 2-step RA; a third power ramping step size for sending PRACH on SBFD symbols in 4-step RA; and a fourth power ramping step size for sending PRACH on non-SBFD symbols in 4-step RA. The third parameter includes a first count and a second count, the first count being the total number of times the PRACH is sent on SBFD symbols and non-SBFD symbols in a 2-step RA, and the second count being the total number of times the PRACH is sent on SBFD symbols and non-SBFD symbols in a 4-step RA; The fifth parameter includes a first offset and a second offset, the first offset being a power offset value for sending PRACH on SBFD symbols when switching from 2-step RA to 4-step RA, and the second offset being a power offset value for sending PRACH on non-SBFD symbols when switching from 2-step RA to 4-step RA.

20. The method according to claim 19, characterized in that The determining, based on the first parameter, the second parameter, the third parameter, the fourth parameter, and the fifth parameter, respectively, actual values ​​of target received powers for sending PRACH on SBFD symbols and non-SBFD symbols in 2-step RA and / or 4-step RA includes: Determine, based on the expected value of the first target received power, the first power ramping step size, the first count, and the fourth parameter, an actual value of the target received power for sending the PRACH on the SBFD symbol in the 2-step RA; Determining an actual value of the target received power for sending the PRACH on non-SBFD symbols in a 2-step RA based on the expected value of the second target received power, the second power ramping step size, the first count, and the fourth parameter; Determine, based on the expected value of the third target received power, the third power ramping step size, the second count, the fourth parameter, and the first offset, an actual value of the target received power for sending the PRACH on the SBFD symbol in the four-step RA; Based on the expected value of the fourth target received power, the fourth power ramping step, the second count, the fourth parameter, and the second offset, an actual value of the target received power for sending PRACH on non-SBFD symbols in the 4-step RA is determined.

21. The method according to claim 18, wherein The first parameter includes at least one of the following: an expected value of a first target received power of a PRACH sent on an SBFD symbol in a 2-step RA; an expected value of a second target received power of a PRACH sent on a non-SBFD symbol in a 2-step RA; an expected value of a third target received power of a PRACH sent on an SBFD symbol in a 4-step RA; and an expected value of a fourth target received power of a PRACH sent on a non-SBFD symbol in a 4-step RA. The second parameter includes at least one of the following: a first power ramping step size for sending PRACH on SBFD symbols in 2-step RA; a second power ramping step size for sending PRACH on non-SBFD symbols in 2-step RA; a third power ramping step size for sending PRACH on SBFD symbols in 4-step RA; and a fourth power ramping step size for sending PRACH on non-SBFD symbols in 4-step RA. The third parameter includes a third count, a fourth count, a fifth count, and a sixth count, wherein the third count is the number of times PRACH is sent on SBFD symbols in 2-step RA, the fourth count is the number of times PRACH is sent on non-SBFD symbols in 2-step RA, and the The fifth count is the number of times the PRACH is sent on SBFD symbols in 4-step RA, and the sixth count is the number of times the PRACH is sent on non-SBFD symbols in 4-step RA; The fifth parameter includes a first offset and a second offset, the first offset being a power offset value for sending PRACH on SBFD symbols when switching from 2-step RA to 4-step RA, and the second offset being a power offset value for sending PRACH on non-SBFD symbols when switching from 2-step RA to 4-step RA.

22. The method according to claim 21, characterized in that The determining, based on the first parameter, the second parameter, the third parameter, the fourth parameter, and the fifth parameter, respectively, actual values ​​of target received powers for sending PRACH on SBFD symbols and non-SBFD symbols in 2-step RA and / or 4-step RA includes: Determine, based on the expected value of the first target received power, the first power ramping step size, the third count, and the fourth parameter, an actual value of the target received power for sending the PRACH on the SBFD symbol in the 2-step RA; Determining an actual value of the target received power for sending the PRACH on non-SBFD symbols in a 2-step RA based on the expected value of the second target received power, the second power ramping step size, the fourth count, and the fourth parameter; Determine, based on the expected value of the third target received power, the third power ramping step size, the fifth count, the fourth parameter, and the first offset, an actual value of the target received power for sending the PRACH on the SBFD symbol in the four-step RA; Based on the expected value of the fourth target received power, the fourth power ramping step, the sixth count, the fourth parameter, and the second offset, an actual value of the target received power for sending PRACH on non-SBFD symbols in the 4-step RA is determined.

23. The method according to claim 20 or 22, characterized in that The sixth parameter includes a first power and a second power, the first power being the maximum transmit power for sending the PRACH on the SBFD symbol, and the second power being the maximum transmit power for sending the PRACH on the non-SBFD symbol; The determining, based on the actual value of the target received power, the sixth parameter, and the seventh parameter, of the transmit power used to send the PRACH on the first time domain unit includes: Determining a transmit power used for transmitting the PRACH on the SBFD symbol in the two-step RA based on an actual value of the target receive power for transmitting the PRACH on the SBFD symbol in the two-step RA, the first power, and the seventh parameter; Determining a transmit power for transmitting the PRACH on non-SBFD symbols in two-step RA based on an actual value of a target receive power for transmitting the PRACH on non-SBFD symbols in two-step RA, the second power, and the seventh parameter; Determining a transmit power used for sending the PRACH on the SBFD symbol in the four-step RA based on an actual value of the target receive power for sending the PRACH on the SBFD symbol in the four-step RA, the first power, and the seventh parameter; The transmit power used to send PRACH on non-SBFD symbols in 4-step RA is determined based on the actual value of the target receive power for sending PRACH on non-SBFD symbols in 4-step RA, the second power, and the seventh parameter.

24. The method according to claim 17, wherein The first information further includes an eighth parameter, where the eighth parameter is used to identify a difference between a transmit power used to send the PRACH on an SBFD symbol and a transmit power used to send the PRACH on a non-SBFD symbol.

25. The method according to claim 24, characterized in that The first parameter includes at least one of the following: in a 2-step RA, an expected value of a fifth target received power for sending a PRACH on the first time domain unit; in a 4-step RA, an expected value of a sixth target received power for sending a PRACH on the first time domain unit; The second parameter includes at least one of the following: in a 2-step RA, a fifth power ramping step size for sending the PRACH on the first time domain unit; in a 4-step RA, a sixth power ramping step size for sending the PRACH on the first time domain unit; The third parameter includes a first count and a second count, the first count being the total number of times the PRACH is sent on SBFD symbols and non-SBFD symbols in a 2-step RA, and the second count being the total number of times the PRACH is sent on SBFD symbols and non-SBFD symbols in a 4-step RA; The fifth parameter includes a third offset, where the third offset is a power offset value for sending the PRACH on the first time domain unit when switching from 2-step RA to 4-step RA.

26. The method according to claim 25, characterized in that The determining, based on the first parameter, the second parameter, the third parameter, the fourth parameter, and the fifth parameter, respectively, actual values ​​of target received powers for sending PRACH on SBFD symbols and non-SBFD symbols in 2-step RA and / or 4-step RA includes: Determine based on the expected value of the fifth target received power, the fifth power ramp step, the first count, and the fourth parameter The actual value of the target received power for sending the PRACH on the first time domain unit in step 2 RA; Based on the expected value of the sixth target received power, the sixth power ramping step, the second count, the fourth parameter, and the third offset, an actual value of the target received power for sending PRACH on the SBFD symbol in the 4-step RA is determined.

27. The method according to claim 26, characterized in that The sixth parameter includes a first power and a second power, the first power being the maximum transmit power for sending the PRACH on the SBFD symbol, and the second power being the maximum transmit power for sending the PRACH on the non-SBFD symbol; The eighth parameter includes a first difference and a second difference, the first difference being the difference between the transmit power used to send the PRACH on the SBFD symbol and the transmit power used to send the PRACH on the non-SBFD symbol in the 2-step RA, and the second difference being the difference between the transmit power used to send the PRACH on the SBFD symbol and the transmit power used to send the PRACH on the non-SBFD symbol in the 4-step RA. The determining, based on the actual value of the target received power, the sixth parameter, the seventh parameter, and / or the eighth parameter, of the transmit power used to send the PRACH on the first time domain unit includes: Determining a transmit power for sending the PRACH on the SBFD symbol in the two-step access based on an actual value of the target received power for sending the PRACH on the first time domain unit in the two-step RA, the first power, the seventh parameter, and the first difference; Determining a transmit power for transmitting the PRACH on non-SBFD symbols in two-step access based on an actual value of the target received power for transmitting the PRACH on the first time domain unit in two-step RA, the second power, the seventh parameter, and the first difference; Determining a transmit power for sending the PRACH on the SBFD symbol in the four-step access based on an actual value of the target received power for sending the PRACH on the first time domain unit in the four-step RA, the first power, the seventh parameter, and the second difference; Based on the actual value of the target received power for sending PRACH on the first time domain unit in the 4-step RA, the second power, the seventh parameter, and the second difference, the transmit power used for sending PRACH on non-SBFD symbols in the 4-step access is determined.

28. The method according to any one of claims 28 to 27, characterized in that The first information also includes the sixth parameter, wherein, The sixth parameter includes a first power, where the first power is the maximum transmit power for sending a PRACH on an SBFD symbol, and a second power is a protocol default, where the second power is the maximum transmit power for sending a PRACH on a non-SBFD symbol; or The sixth parameter includes the second power, and the first power is a protocol default; or The sixth parameter includes the first power and the second power, and the first power is different from the second power.

29. A terminal, characterized in that: include: a transceiver module, configured to receive first information sent by a network device, where the first information is used to configure a physical random access channel PRACH; The processing module is configured to determine, based on the first information, a transmit power used to transmit the PRACH on a first time domain unit, where the first time domain unit includes a sub-band full-duplex SBFD symbol and a non-SBFD symbol.

30. A network device, characterized in that: include: a transceiver module, configured to send first information to a terminal, where the first information is used to configure a physical random access channel PRACH; The processing module is configured to determine, based on the first information, a transmit power used to transmit the PRACH on a first time domain unit, where the first time domain unit includes a sub-band full-duplex SBFD symbol and a non-SBFD symbol.

31. A communication device, wherein: include: transceiver; Memory; A processor is connected to the transceiver and the memory respectively, and is configured to control the wireless signal reception and transmission of the transceiver by executing computer-executable instructions on the memory, and can implement the method described in any one of claims 1-28.

32. A computer storage medium, wherein: The computer storage medium stores computer-executable instructions; after the computer-executable instructions are executed by the processor, the method according to any one of claims 1 to 28 can be implemented.

33. A communication system, characterized in that: The method comprises a terminal and a network device, wherein the terminal is used to execute the method according to any one of claims 1 to 14, and the network device is used to execute the method according to any one of claims 15 to 28.

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