WO2024093972A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2024093972A1
WO2024093972A1 PCT/CN2023/128198 CN2023128198W WO2024093972A1 WO 2024093972 A1 WO2024093972 A1 WO 2024093972A1 CN 2023128198 W CN2023128198 W CN 2023128198W WO 2024093972 A1 WO2024093972 A1 WO 2024093972A1
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WIPO (PCT)
Prior art keywords
frequency domain
domain resource
resource set
synchronization signal
terminal device
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PCT/CN2023/128198
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English (en)
Chinese (zh)
Inventor
黎超
焦瑞晟
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华为技术有限公司
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Publication of WO2024093972A1 publication Critical patent/WO2024093972A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/40—Resource management for direct mode communication, e.g. D2D or sidelink

Definitions

  • the present application relates to the field of communications, and more specifically, to a communication method and device.
  • spectrum resources can be divided into licensed spectrum and unlicensed spectrum.
  • SL sidelink
  • enabling unlicensed spectrum is an important evolution direction, and the corresponding protocol technology can be collectively referred to as the sidelink of unlicensed spectrum (sidelink unlicensed, SL-U).
  • the terminal device needs to select physical resources in the resource pool for data transmission. For example, the terminal device can seize the channel by listening before talking (LBT), or share the resources obtained after other terminal devices seize the channel to transmit data.
  • LBT listening before talking
  • SL-U if the channel occupancy period (COT) obtained by the terminal device through Type 1 LBT overlaps with the S-SSB resource location configured on the resource pool, a COT interruption will occur. Then, the terminal device needs to restart the Type 1 LBT process, which may increase the delay of side transmission and cannot guarantee the reliability of system transmission.
  • COT channel occupancy period
  • the present application provides a communication method and device, which can improve the reliability of system transmission.
  • a communication method is provided, which can be performed by a first terminal device (e.g., user equipment (UE1)), or can also be performed by a chip or circuit for the first terminal device, which is not limited in the present application.
  • a first terminal device e.g., user equipment (UE1)
  • UE1 user equipment
  • a chip or circuit for the first terminal device which is not limited in the present application.
  • the following description is given by taking the first terminal device as an example.
  • the method includes: the first terminal device determines M frequency domain resource sets, the M frequency domain resource sets include a first frequency domain resource set and a second frequency domain resource set, the second frequency domain resource set includes frequency domain resources of sidelink synchronization signal resources, the first frequency domain resource set is other M-1 frequency domain resource sets except the second frequency domain resource set, and M is an integer greater than 1; the first terminal device sends a sidelink synchronization signal block and a first signal in a first time unit, the sidelink synchronization signal block is located in the second frequency domain resource set, the first signal is located in the first frequency domain resource set, the first signal includes a physical sidelink broadcast channel (physical sidelink broadcast channel, PSBCH), and the first signal is determined by the index of the frequency domain resource set.
  • the M determines M frequency domain resource sets, the M frequency domain resource sets include a first frequency domain resource set and a second frequency domain resource set, the second frequency domain resource set includes frequency domain resources of sidelink synchronization signal resources, the first frequency domain resource set is other M-1 frequency domain resource sets except
  • the frequency domain resource set includes any one of the following: the frequency domain resource set is a resource block set on a resource pool; the frequency domain resource set is a resource block set included in the channel occupancy time COT of the first terminal device; M frequency domain resource sets are located in a synchronization resource block set, and the synchronization resource block set includes a second frequency domain resource set and M-1 first frequency domain resource sets; M frequency domain resource sets are M1 frequency domain resource sets located on the resource pool, and each resource block set includes M2 frequency domain resource sets; or, M frequency domain resource sets are M1 frequency domain resource sets located on the channel occupancy time COT of the first terminal device, and each resource block set includes M2 frequency domain resource sets.
  • the first signal can be determined by any of the following methods: an index of a primary synchronization signal in a resource block set (e.g., RB set) or an index of a frequency domain resource set occupied by the primary synchronization signal; an index of a secondary synchronization signal in a resource block set or an index of a frequency domain resource set occupied by the secondary synchronization signal; an index of a PSBCH in a resource block set or an index of a frequency domain resource set occupied by the PSBCH.
  • a resource block set e.g., RB set
  • the first terminal device determines M frequency domain resource sets, and sends a side synchronization signal block on the second frequency domain resource set on the first time unit, and sends a first signal on the first frequency domain resource set on the first time unit, ensuring that the signals sent by the first frequency domain resource set and the second frequency domain resource set on the first time unit are different, so as to avoid the influence of the high peak-to-average ratio and thereby improve the system transmission performance.
  • the first signal also includes: a sidelink primary synchronization signal (S-PSS), and/or a sidelink secondary synchronization signal (S-SSS).
  • S-PSS sidelink primary synchronization signal
  • S-SSS sidelink secondary synchronization signal
  • the first terminal device obtains channel occupancy time (COT), and the COT includes a first frequency domain resource set and a second frequency domain resource set.
  • COT channel occupancy time
  • all first signals are PSBCHs.
  • mapping the first signal (i.e., PSBCH) on the asynchronous RB set on the synchronous time unit can ensure that the signals on the S-PSS symbol and the S-SSS symbol on each RB set are different, thereby reducing the peak to average power ratio (PAPR).
  • PAPR peak to average power ratio
  • the first terminal device copies the PSBCH of the second frequency domain resource set on the first time unit to the symbol corresponding to the first frequency domain resource set in the first time unit; the first terminal device copies the PSBCH of the second frequency domain resource set on some symbols of the first time unit to the symbols corresponding to the S-PSS and S-SSS on the first frequency domain resource set and the first time unit.
  • the first signal also includes S-PSS and/or S-SSS, and the symbol position of the S-PSS in the first frequency domain resource set is different from the symbol position of the S-PSS in the second frequency domain resource set.
  • mapping the first signal (i.e., PSBCH) in the above manner on the non-synchronous RB set on the synchronous time unit can ensure that the signals on each symbol on each RB set are different, thereby reducing the PAPR. Furthermore, because the PSBCH on the first frequency domain resource uses the same numbered bits as the PSBCH on the second frequency domain resource, only one cache is needed to store the PSBCH encoded bits to map to different frequency domain resource sets. This implementation further reduces the storage size of the first terminal device and saves costs.
  • the first terminal device determines Mt S-PSS sequences, where the Mt S-PSS sequences are determined by an index of a frequency domain resource set, where Mt is a positive integer not greater than M.
  • the Mt S-PSS sequences are determined according to the following method:
  • S-PSS(i,j) (S-PSS(0,j)+c(i,j))mod 2, 0 ⁇ j ⁇ L-1, 0 ⁇ i ⁇ Mt-1;
  • L is the length of the S-PSS sequence
  • S-PSS(0,j) is the main synchronization signal sequence in the side synchronization signal block
  • c(i,j) represents the jth code element in the i-th random sequence
  • the initial value of c(i,j) is determined by the identifier of the side synchronization signal sequence and/or the index of the frequency domain resource set
  • mod represents the modulo operation
  • Mt is a positive integer.
  • S-PSS(0,j) is the main synchronization signal sequence in the side synchronization signal block used for synchronizing the S-SSB signal.
  • the Mt S-PSS sequences are determined according to the following method:
  • S-PSS(i,j) S-PSS(0,j)*(1-2*c(i,j)), 0 ⁇ j ⁇ L-1;
  • L is the length of the S-PSS sequence
  • S-PSS(0,j) is the main synchronization signal sequence in the side synchronization signal block
  • c(i,j) represents the jth codeword in the i-th random sequence
  • the initial value of c(i,j) is determined by the identifier of the side synchronization signal sequence and/or the index i of the frequency domain resource set, where i is an integer.
  • S-PSS(i,j) represents i repeated scrambled S-PSS sequences
  • S-PSS(0,j) represents the S-PSS sequence at the frequency position of the S-SSB used for synchronization (which can be referred to as S-SSB ARFCN)
  • i is the S-SSB repetition number index. That is to say, in this implementation, the S-SSBs of non-synchronous frequency points other than the S-SSB used for synchronization are scrambled.
  • a random sequence is generated using parameters related to the index of the frequency domain resource set, and then the random sequence is used to scramble the S-PSS and S-SSS sequences on the non-synchronous frequency points, so that M-1 different S-PSS sequences and M-1 different S-SSS sequences can be obtained. Together with the S-PSS sequence and S-SSS sequence on the original synchronous frequency point, M different S-PSS sequences and M different S-SSS sequences can be obtained respectively. Because these M sequences are different, the PAPR of the time domain signal generated by the signal of these M frequency domain resource sets can be reduced to the greatest extent, thereby increasing the maximum available power during actual transmission and improving the transmission performance.
  • the first terminal device determines Nt S-SSS sequences, where the Nt S-SSS sequences are determined by an index of a frequency domain resource set, where Nt is a positive integer not greater than M.
  • the Nt S-SSS sequences are determined according to the following method:
  • S-SSS(i,j) (S-SSS(0,j)+c(i,j))mod 2, 0 ⁇ j ⁇ L-1, 0 ⁇ i ⁇ Mt-1;
  • L is the length of the S-SSS sequence
  • S-SSS(0,j) is the slave synchronization signal sequence in the side synchronization signal block
  • c(i,j) represents the i-th
  • the initial value of c(i,j) of the j-th codeword in the random sequence is determined by the identifier of the sideline synchronization signal sequence and/or the index of the frequency domain resource set, and mod represents a modulo operation.
  • S-SSS(0,j) is the S-SSB signal used for synchronization from the synchronization signal sequence in the side synchronization signal block.
  • the Nt S-SSS sequences are determined according to the following method:
  • S-SSS(i,j) S-SSS(0,j)*(1-2*c(i,j)), 0 ⁇ j ⁇ L-1;
  • L is the length of the S-SSS sequence
  • S-SSS(0,j) is the slave synchronization signal sequence in the side synchronization signal block
  • c(i,j) represents the jth codeword in the i-th random sequence
  • the initial value of c(i,j) is determined by the identifier of the side synchronization signal sequence and/or the index i of the frequency domain resource set, where i is an integer.
  • S-SSS(i,j) represents i repeated scrambled S-SSS sequences
  • S-SSS(0,j) represents the S-SSS sequence at the frequency position of the S-SSB (which can be abbreviated as S-SSB ARFCN) used for synchronization
  • i is the S-SSB repetition number index. That is to say, in this implementation, the S-SSBs of non-synchronous frequency points other than the S-SSB used for synchronization are scrambled.
  • the M frequency domain resource sets respectively include a first frequency domain resource set (a frequency domain resource set for synchronization) and M-1 second frequency domain resource sets (a frequency domain resource set for non-synchronization), and each frequency domain resource set includes an S-SSB.
  • the frequency domain resource set and the S-SSB correspond one-to-one, that is, the frequency domain resource set is numbered as the index i of the frequency domain resource set, and can also be used as the index of the S-SSB, that is, the S-SSB repetition number index.
  • a random sequence is generated using parameters related to the index of the frequency domain resource set, and then the random sequence is used to scramble the S-PSS and S-SSS sequences on the non-synchronous frequency points, so that M-1 different S-PSS sequences and M-1 different S-SSS sequences can be obtained. Together with the S-PSS sequence on the original synchronous frequency point and the S-SSS sequence on the original synchronous frequency point, M different S-PSS sequences and M different S-SSS sequences can be obtained respectively. Because these M sequences are different, the PAPR of the time domain signal generated by the signal number of these M frequency domain resource sets can be reduced to the greatest extent, thereby increasing the maximum available power during actual transmission and improving the transmission performance.
  • the first terminal device determines M S-SSS sequences, and the M S-SSS sequences correspond one-to-one to the indexes of M frequency domain resource sets.
  • mapping the first signal (i.e., PSBCH, S-SSS, and S-PSS) in the above-mentioned manner on the asynchronous RB set on the synchronous time unit can ensure that the signals on each symbol on each RB set are different, thereby reducing the PAPR.
  • the first signal includes at least one side primary synchronization signal S-PSS.
  • the first signal includes M-1 sideways main synchronization signals S-PSS, and the first terminal device scrambles the M-1 S-PSSs according to the M S-SSS sequences.
  • the first terminal device determines M S-SSS sequences, including: the first terminal device determines M S-SSS sequences based on an identifier of a sidelink synchronization signal sequence (sidelinksynchronizationsignal identifier, SLSSID_n) in a second frequency domain resource set, where 1 ⁇ i ⁇ M is an integer.
  • sidelink synchronization signal sequence sidelinksynchronizationsignal identifier, SLSSID_n
  • the first frequency domain resource set is a first resource block set
  • the second frequency domain resource set is a second resource block set
  • the first frequency domain resource set and the second frequency domain resource set are located in the same resource block set.
  • first frequency domain resource set and the second frequency domain resource set are located in different resource block sets, or the first frequency domain resource set and the second frequency domain resource set are located in the same resource block set, and resource frequency division is performed.
  • the sideline synchronization signal block includes a first sideline synchronization signal block and a second sideline synchronization signal block.
  • the first side row synchronization signal block is located outside the resource pool, and the second side row synchronization signal block is located inside the resource pool or outside the resource pool.
  • the first sideline synchronization signal block accesses the channel using a short control signaling method
  • the second sideline synchronization signal block accesses the channel using a sensing method
  • accessing the channel using short control signaling includes: accessing the channel without using a sensing method, or accessing the channel using a type 2A channel access method.
  • accessing the channel by means of short control signaling satisfies: a duty cycle of sending the first side synchronization signal does not exceed 1/20.
  • the starting and ending positions of the frequency domain resources occupied by the PSBCH in the side synchronization signal block are: subcarrier 0 to subcarrier 131; the starting and ending positions of the frequency domain resources occupied by the S-PSS and/or S-SSS in the side synchronization signal block are: subcarrier 2 to subcarrier 128.
  • the first signal is determined by the index of the frequency domain resource set, including: the first terminal device generates a first sequence, an integer of 1 ⁇ i ⁇ M, based on the index of the i-th frequency domain resource set; the first terminal device scrambles the PSBCH on the i-th frequency domain resource set on the first time unit according to the first sequence.
  • the scrambling for PSBCH may be determined according to the following method:
  • b(0,n) represents the frequency position of the S-SSB (S-SSB ARFCN) used for synchronization before modulation, and the bit transmitted on the physical side link broadcast channel
  • M bit represents the number of bits before PSBCH scrambling
  • c(i,n) represents the symbol n of the i-th scrambled sequence
  • mod represents the modulo operation.
  • the value of c(i,n) is 0 or 1.
  • a random sequence is generated using parameters related to the index of the frequency domain resource set, and then the random sequence is used to scramble the information carried in the PSBCH on the non-synchronous frequency point, and M-1 different scrambled PSBCHs can be used. Adding the unscrambled PSBCH on the original synchronous frequency point, M different PSBCHs can be obtained. Because the bits transmitted on these M PSBCHs are different, the PAPR of the PSBCH transmitted in these M frequency domain resource sets can be reduced to the greatest extent, thereby increasing the maximum available power during actual transmission and improving the transmission performance.
  • the first signal is determined by the index of the frequency domain resource set, including: the first terminal device generates a first sequence according to the index of the first frequency domain resource set; the first terminal device scrambles the PSBCH on the first frequency domain resource set on the first time unit according to the first sequence.
  • the first sequence is a random sequence, and the initial value of the random sequence is determined by the identifier of the side synchronization signal sequence and/or the index of the i-th frequency domain resource set, or; the first sequence is a random sequence, and the initial value of the random sequence is determined by the identifier of the side synchronization signal sequence and/or the index of the first frequency domain resource set.
  • the frequency domain resource set includes any one of the following:
  • the frequency domain resource set is a resource block set included in the resource pool
  • the frequency domain resource set is a resource block set included in the channel occupancy time COT of the first terminal device
  • the M frequency domain resource sets are located in one synchronization resource block set, and the synchronization resource block set includes the second frequency domain resource set and M-1 first frequency domain resource sets;
  • the M frequency domain resource sets are located in M1 frequency domain resource sets in a resource pool, wherein each resource block set includes M2 frequency domain resource sets; or,
  • the M frequency domain resource sets are M1 frequency domain resource sets located on the channel occupancy time COT of the first terminal device, wherein each resource block set includes M2 frequency domain resource sets.
  • the index of the frequency domain resource set includes any one of the following:
  • the index of the M frequency domain resource sets determined by the first terminal device is determined by the first terminal device
  • the index of the PSBCH in the resource block set or the index of the frequency domain resource set occupied by the PSBCH in the resource block set is not limited.
  • the index of the i-th frequency domain resource set is determined based on any one of the following: the index of the i-th frequency domain resource set; the difference between the index of the first frequency domain resource set and the index of the second frequency domain resource set; the absolute value of the difference between the index of the first frequency domain resource set and the index of the second frequency domain resource set; the sum of the difference between the index of the first frequency domain resource set and the index of the second frequency domain resource set and M; the parameter value configured for the frequency domain resource set.
  • different sequences can be used to scramble the PSBCH, which can solve the problem of signal overlap on multiple frequency domain resource sets.
  • the same signal on the symbol where the PSBCH is located between multiple non-synchronous RB sets may lead to problems such as limited transmit power.
  • the PSBCH includes a reference signal for PSBCH demodulation, the reference signal for PSBCH demodulation is generated by a second random sequence, and the initial value of the second random sequence is determined by an identifier of a side synchronization signal sequence and/or an index of a first frequency domain resource set.
  • the initial value of the random sequence and/or the first sequence used to scramble the S-PSS, S-SSS and/or PSBCH in the i-th frequency domain resource set is determined according to any one of the following expressions:
  • c init (i) is the initial value of the random sequence, i is any integer from 0 to M-1, or from 1 to M, or from 1 to M-1, k is an integer greater than or equal to 1, q is an integer greater than or equal to 1, Indicates the identifier of the side synchronization signal sequence, floor(x) indicates that x is rounded down.
  • the value of k can be 10, 20, 30, etc.
  • the value of q can be 10, 20, 21, 30, etc.
  • (q+k) ⁇ 31 for example, the value of (q+k) is any integer from 20 to 31, such as 20, 21, 25, 30 or 31, etc.
  • M is the M frequency domain resource sets determined by the first terminal device.
  • q 20 or 21, and the 31-bit shift register can be shifted as much as possible.
  • the remaining 20 or 21 bits of the 31 bits other than the occupied 10 bits are randomized as much as possible to increase the difference of the sequence, thereby further reducing the PAPR.
  • a communication method is provided, which can be executed by a second terminal device (e.g., UE2), or can also be executed by a chip or circuit for the second terminal device, which is not limited in this application.
  • a second terminal device e.g., UE2
  • a chip or circuit for the second terminal device which is not limited in this application.
  • the following is an example of execution by the second terminal device.
  • the method includes: the second terminal device receives indication information from the first terminal device, the indication information indicates a first frequency domain resource set, and/or a second frequency domain resource set; the second terminal device receives a side synchronization signal block on the second frequency domain resource set on the first time unit; wherein the second frequency domain resource set includes frequency domain resources of side synchronization signal resources, the first frequency domain resource set is the other M-1 frequency domain resource sets among the M frequency domain resource sets except the second frequency domain resource set, the M frequency domain resource sets are determined by the first terminal device, and M is an integer greater than 1.
  • the second terminal device can receive the indication information of the first terminal device, and determine the first frequency domain resource set and/or the second frequency domain resource set based on the indication information, and receive the side synchronization signal block on the second frequency domain resource set on the first time unit, to ensure that the signals sent by the first frequency domain resource set and the second frequency domain resource set on the first time unit are different, so as to avoid the influence of the high peak-to-average ratio and thereby improve the system transmission performance.
  • the second terminal device receives a first signal on a first frequency domain resource set on a first time unit, the first signal includes a PSBCH, and the first signal is determined by an index of the frequency domain resource set.
  • the first signal also includes S-PSS and/or S-SSS.
  • all first signals are PSBCHs.
  • mapping the first signal (i.e., PSBCH) on the asynchronous RB set on the synchronous time unit can ensure that the signals on the S-PSS symbol and the S-SSS symbol on each RB set are different, thereby reducing the PAPR.
  • the first signal also includes S-PSS and/or S-SSS, and the symbol position of the S-PSS in the first frequency domain resource set is different from the symbol position of the S-PSS in the second frequency domain resource set.
  • mapping the first signal (i.e., PSBCH) in the above manner on the non-synchronous RB set on the synchronous time unit can ensure that the signals on each symbol on each RB set are different, thereby reducing the PAPR. Furthermore, because the PSBCH on the first frequency domain resource uses the same numbered bits as the PSBCH on the second frequency domain resource, only one cache is needed to store the PSBCH encoded bits to map to different frequency domain resource sets. This implementation further reduces the storage size of the first terminal device and saves costs.
  • the first frequency domain resource set is a first resource block set
  • the second frequency domain resource set is a second resource block set
  • the first frequency domain resource set and the second frequency domain resource set are located in the same resource block set.
  • first frequency domain resource set and the second frequency domain resource set are located in different resource block sets, or the first frequency domain resource set and the second frequency domain resource set are located in the same resource block set, and resource frequency division is performed.
  • the sideline synchronization signal block includes a first sideline synchronization signal block and a second sideline synchronization signal block, the first sideline synchronization signal block is located outside the resource pool, and the second sideline synchronization signal block is located inside the resource pool or outside the resource pool.
  • the first sideline synchronization signal block accesses the channel using a short control signaling method
  • the second sideline synchronization signal block accesses the channel using a sensing method
  • accessing the channel using short control signaling includes: accessing the channel without using a sensing method, or accessing the channel using a type 2A channel access method.
  • accessing the channel by means of short control signaling satisfies: a duty cycle of sending the first side synchronization signal does not exceed 1/20.
  • the starting and ending positions of the frequency domain resources occupied by the PSBCH in the side synchronization signal block are: subcarrier 0 to subcarrier 131; the starting and ending positions of the frequency domain resources occupied by the S-PSS and/or S-SSS in the side synchronization signal block are: subcarrier 2 to subcarrier 128.
  • the frequency domain resource set includes any one of the following:
  • the frequency domain resource set is a resource block set included in the resource pool
  • the frequency domain resource set is a resource block set included in the channel occupancy time COT of the first terminal device
  • the M frequency domain resource sets are located in one synchronization resource block set, and the synchronization resource block set includes the second frequency domain resource set and M-1 first frequency domain resource sets;
  • the M frequency domain resource sets are located in M1 frequency domain resource sets in a resource pool, wherein each resource block set includes M2 frequency domain resource sets; or,
  • the M frequency domain resource sets are M1 frequency domain resource sets located on the channel occupancy time COT of the first terminal device, wherein each resource block set includes M2 frequency domain resource sets.
  • the index of the frequency domain resource set includes any one of the following:
  • the index of the M frequency domain resource sets determined by the first terminal device is determined by the first terminal device
  • the index of the PSBCH in the resource block set or the index of the frequency domain resource set occupied by the PSBCH in the resource block set is not limited.
  • the index of the i-th frequency domain resource set is determined based on any one of the following: the index of the i-th frequency domain resource set; the difference between the index of the first frequency domain resource set and the index of the second frequency domain resource set; the absolute value of the difference between the index of the first frequency domain resource set and the index of the second frequency domain resource set; the sum of the difference between the index of the first frequency domain resource set and the index of the second frequency domain resource set and M; the parameter value configured for the frequency domain resource set.
  • different sequences can be used to scramble the PSBCH, which can solve the problem of identical signals on multiple frequency domain resource sets, especially the problem that the identical signals on the symbols where the PSBCH is located between multiple asynchronous RB sets may lead to problems such as limited transmission power.
  • the PSBCH includes a reference signal for PSBCH demodulation, the reference signal for PSBCH demodulation is generated by a second random sequence, and the initial value of the second random sequence is determined by the identifier of the side synchronization signal sequence and/or the index of the first frequency domain resource set.
  • the initial value of the random sequence and/or the first sequence used to scramble the S-PSS, S-SSS and/or PSBCH in the i-th frequency domain resource set satisfies any one of the following relationships:
  • c init (i) is the initial value of the random sequence, i is any integer from 0 to M-1, or from 1 to M, or from 1 to M-1, k is an integer greater than or equal to 1, q is an integer greater than or equal to 1, Indicates the identifier of the side synchronization signal sequence, floor(x) indicates that x is rounded down.
  • the value of k can be 10, 20, 30, etc.
  • the value of q can be 10, 20, 21, 30, etc.
  • (q+k) ⁇ 31 for example, the value of (q+k) is any integer between 20 and 31, such as 20, 21, 25, 30 or 31, etc.
  • M is a set of M frequency domain resources determined by the first terminal device.
  • a communication method is provided, which can be executed by a first terminal device (e.g., UE1), or can also be executed by a chip or circuit for the first terminal device, which is not limited in this application.
  • a first terminal device e.g., UE1
  • a chip or circuit for the first terminal device which is not limited in this application.
  • the following description is taken as an example of execution by the first terminal device.
  • the method includes: the first terminal device obtains the channel occupancy time COT, the COT includes a side synchronization signal resource, the side synchronization signal resource includes a first synchronization resource and/or a second synchronization resource, the first synchronization resource is used for the first terminal device to send a side synchronization signal, and the second synchronization resource is used for the first terminal device to receive a side synchronization signal; the first terminal device sends first information to the second terminal device, and the first information indicates the side synchronization signal resource.
  • the public S-SSB resources are used as part of the COT of the first terminal device, and the receiving and sending status of the S-SSB resources is indicated, which can avoid interruption of the first terminal device, improve system transmission performance, reduce transmission delay, etc.
  • the sideline synchronization signal resource includes a first synchronization resource and a second synchronization resource; or, the sideline synchronization signal resource includes a first synchronization resource and two second synchronization resources.
  • N side synchronization signal resources there are N side synchronization signal resources, and the value of N can be 2 or 3.
  • the first terminal device obtains Nc candidate synchronization resources from the first synchronization resource and/or the second synchronization resource, and the Nc candidate synchronization resources are configured, pre-configured, or reserved in the resource pool through signaling, and Nc is less than or equal to N.
  • the first terminal device determines Na synchronization resources in the first synchronization resource or the second synchronization resource that overlap with the COT, respectively, and Na is less than or equal to Nc.
  • synchronization resource is a sideline synchronization signal resource indicated by the first information.
  • part or all of the Na synchronization resource indicated by the first information is the first synchronization resource or the second synchronization resource.
  • the first terminal device sends a sideline synchronization signal on a first synchronization resource; and/or the first terminal device receives a sideline synchronization signal on one or more second synchronization resources.
  • the first terminal device instructs the second terminal device to send a sideline synchronization signal on one or more second synchronization resources.
  • the first terminal device includes a GAP of a first duration before receiving or instructing the second terminal device to send a second synchronization resource in which the sideline synchronization signal is sent.
  • the GAP is not used to send or receive data or signals.
  • the GAP of the first duration is predefined, configured or preconfigured.
  • the size of the GAP of the first duration may be 16 ⁇ s or 25 ⁇ s, etc.
  • the first information is COT shared information sent by the first terminal device.
  • the first information includes P bits, and the i-th bit of the P bits is used to indicate that the i-th sideline synchronization signal resource among N sideline signal synchronization resources is the first synchronization resource or the second synchronization resource; or, the first information includes: ceil(log 2 (N)) bits, used to indicate the first synchronization resource or the second synchronization resource among the N sideline synchronization signal resources, where ceil(x) represents rounding up x.
  • the first terminal device sends first indication information to the second terminal device, including: the first terminal device sends side control information to the second terminal device, the side control information includes the first indication information; or, the first terminal device sends a media access control element MAC CE to the second terminal device, the MAC CE includes the first indication information; or, the first terminal device sends side control information and MAC CE to the second terminal device, the side control information and MAC CE include the first indication information.
  • COT occupies M frequency domain resource sets, where M is an integer greater than 1; when M is greater than 1, the M frequency domain resource sets include a first frequency domain resource set and a second frequency domain resource set, the second frequency domain resource set includes frequency domain resources for sidelink synchronization signal resources, and the first frequency domain resource set is the other M-1 frequency domain resource sets in the M frequency domain resource sets except the second frequency domain resource set; or, the M frequency domain resource sets include the first frequency domain resource set, the first frequency domain resource set is the other M-1 frequency domain resource sets in the M frequency domain resource sets except the second frequency domain resource set, and the second frequency domain resource set includes frequency domain resources for sidelink synchronization signal resources.
  • the first frequency domain resource set of the first terminal device in the first time unit The sending data or the signal associated with the sideline synchronization signal block is closed, and the first time unit is the time unit where the first synchronization resource in the second frequency domain resource set is located.
  • the first terminal device obtains second information indicating that a first frequency domain resource set on a first time unit is used to send data, or a signal associated with a side synchronization signal block.
  • the first terminal device sends third information to the second terminal device, and the third information indicates that the first frequency domain resource set on the second time unit is used for the second terminal device to send or receive data, or a signal associated with a side synchronization signal block, and the second time unit is a time unit where the second synchronization resource in the second frequency domain resource set is located.
  • the first terminal device obtains fourth information, and the fourth information indicates that the first frequency domain resource set on the second time unit is used to receive data, or a signal associated with a side synchronization signal.
  • a communication method is provided, which can be executed by a second terminal device (e.g., UE2), or can also be executed by a chip or circuit for the second terminal device, which is not limited in this application.
  • a second terminal device e.g., UE2
  • a chip or circuit for the second terminal device which is not limited in this application.
  • the following is an example of execution by the second terminal device.
  • the method includes: a second terminal device receives first information from a first terminal device, the first information indicates a sideline synchronization signal resource, the sideline synchronization signal resource includes a first synchronization resource and/or a second synchronization resource, the first synchronization resource is used by the first terminal device to send a sideline synchronization signal, the second synchronization resource is used by the first terminal device to receive a sideline synchronization signal, and the sideline synchronization signal resource is included in the COT obtained by the first terminal device; the second terminal device receives or sends a sideline synchronization signal according to the first information.
  • the public S-SSB resources are used as part of the COT of the first terminal device, and the receiving and sending status of the S-SSB resources is indicated, which can avoid interruption of the first terminal device, improve system transmission performance, reduce transmission delay, etc.
  • the sideline synchronization signal resource includes a first synchronization resource and a second synchronization resource; or, the sideline synchronization signal resource includes a first synchronization resource and two second synchronization resources.
  • the second terminal device receives a sideline synchronization signal from the first terminal device on the first synchronization resource; and/or the second terminal device sends a sideline synchronization signal to the first terminal device on the second synchronization resource.
  • the first information includes: P bits, the i-th bit of the P bits is used to indicate that the i-th sideline synchronization signal resource among the N sideline synchronization signal resources is the first synchronization resource or the second synchronization resource; or, the first information includes: ceil(log 2 (N)) bits, used to indicate the first synchronization resource or the second synchronization resource among the N sideline synchronization signal resources, where ceil(x) represents rounding up x.
  • the second terminal device receives first indication information from the first terminal device, including: the second terminal device receives side control information from the first terminal device, the side control information includes the first indication information; or, the second terminal device receives a media access control element MAC CE from the first terminal device, the MAC CE includes the first indication information; or, the second terminal device receives side control information and MAC CE from the first terminal device, the side control information and MAC CE include the first indication information.
  • COT occupies M frequency domain resource sets, where M is an integer greater than 1; when M is greater than 1, the M frequency domain resource sets include a first frequency domain resource set and a second frequency domain resource set, the second frequency domain resource set includes frequency domain resources of side synchronization signal resources, and the first frequency domain resource set is the other M-1 frequency domain resource sets in the M frequency domain resource sets except the second frequency domain resource set; or, the M frequency domain resource sets include the first frequency domain resource set, the first frequency domain resource set is the other M-1 frequency domain resource sets in the M frequency domain resource sets except the second frequency domain resource set, and the second frequency domain resource set includes frequency domain resources of side synchronization signal resources.
  • the second terminal device receives data from the first terminal device, or a signal associated with a side synchronization signal block, on a first frequency domain resource set on a first time unit, and the first time unit is a time unit where the first synchronization resource in the second frequency domain resource set is located.
  • the second terminal device receives third information from the first terminal device, and the third information indicates that the first frequency domain resource set on the second time unit is used for the second terminal device to send or receive data, or a signal associated with a side synchronization signal block, and the second time unit is a time unit where the second synchronization resource in the second frequency domain resource set is located.
  • the timing of sending the third information (eg, COT sharing indication information) needs to be at least before the time unit where the second synchronization resource is located.
  • a communication method is provided, which can be executed by a first terminal device (e.g., UE1), or can also be executed by a chip or circuit for the first terminal device, which is not limited in this application.
  • a first terminal device e.g., UE1
  • a chip or circuit for the first terminal device which is not limited in this application.
  • the following is an example of execution by the first terminal device.
  • the method includes: the first terminal device determines a sideline synchronization signal block and first data, and the sideline synchronization signal block and the first data are located on different frequency domain resources on a first time unit; the first terminal device determines to send or receive the sideline synchronization signal block and/or the first data on the first time unit according to the priority of the sideline synchronization signal block and/or the first data.
  • the first terminal device determines whether to transmit the first data and the side synchronization signal block concurrently based on the relationship between the relative priorities of the first data and the side synchronization signal block.
  • the first terminal device determines to send or receive a side synchronization signal block on the first time unit.
  • the first resource is configured in the resource pool for sending or receiving a side synchronization signal block, which may be a configured S-SSB resource, and the first synchronization signal block is sent on the first resource.
  • the second resource may be a candidate synchronization resource, such as a candidate S-SSB resource, and the second synchronization signal block is sent on the second resource.
  • the first terminal device determines to send or receive a side synchronization signal block and/or first data on the first time unit based on the usage of the first resource.
  • the side synchronization signal block and the first data are to be sent by the first terminal device in the first time unit.
  • the first terminal device when the first terminal device successfully sends the first sideline synchronization signal block on the first resource, the first terminal device determines to send the first data on the first time unit.
  • the first terminal device when the first terminal device fails to successfully send the first side synchronization signal block on the first resource, the first terminal device determines to send the side synchronization signal block and/or the first data on the first time unit based on the priority of the side synchronization signal block and/or the first data.
  • the first terminal device when the first terminal device fails to successfully send the first side synchronization signal block on the first resource, the first terminal device determines to send the side synchronization signal block and/or the first data on the first time unit based on the first indication information.
  • the first terminal device determines to send a side synchronization signal block at the first time unit: the priority of the side synchronization signal block is higher than the priority of the first data; the priority of the side synchronization signal block is higher than the configured first priority threshold; the priority of the side synchronization signal block is higher than the priority of the first data, and the priority of the side synchronization signal block is higher than the configured first priority threshold; the first indication information is used to indicate the sending of the side synchronization signal block; the first indication information is used to indicate the sending of the side synchronization signal block and the first data.
  • the first terminal device determines to send the first data on the first time unit: the priority of the first data is higher than the priority of the sideline synchronization signal block; the priority of the first data is higher than the configured first priority threshold; the priority of the first data is higher than the priority of the sideline synchronization signal block, and the priority of the first data is higher than the configured first priority threshold; the first indication information is used to indicate the sending of the first data; the first indication information is used to indicate the sending of the sideline synchronization signal block and the first data.
  • the side synchronization signal block is to be sent by the first terminal device at the first time unit, and the first data is to be received by the first terminal device at the first time unit; or, the side synchronization signal block is to be received by the first terminal device at the first time unit, and the first data is to be sent by the first terminal device at the first time unit.
  • the first terminal device when the first terminal device successfully sends the first sideline synchronization signal block on the first resource, the first terminal device determines to send the first data on the first time unit.
  • the first terminal device when the first terminal device does not send or receive the first side synchronization signal block on the first resource, the first terminal device determines to send the side synchronization signal block and/or the first data on the first time unit based on the priority of the side synchronization signal block and/or the first data.
  • the first terminal device when the first terminal device does not send or receive the first side synchronization signal block on the first resource, the first terminal device determines to send the side synchronization signal block and/or the first data on the first time unit based on the second indication information.
  • the first terminal device determines to send or receive a sideline synchronization signal block on the first time unit: the priority of the sideline synchronization signal block is higher than the priority of the first data; the priority of the sideline synchronization signal block is higher than the configured first priority threshold; the priority of the sideline synchronization signal block is higher than the priority of the first data, and the priority of the sideline synchronization signal block is higher than the configured first priority threshold; the second indication information is used to indicate sending the sideline synchronization signal block; The second indication information is used to indicate the sending side line synchronization signal block and the first data.
  • the first terminal determines to send or receive the first data on the first time unit: the priority of the first data is higher than the priority of the sideline synchronization signal block; the priority of the first data is higher than the configured first priority threshold; the priority of the first data is higher than the priority of the sideline synchronization signal block, and the priority of the first data is higher than the configured first priority threshold; the second indication information is used to indicate the sending of the first data; the second indication information is used to indicate the sending of the sideline synchronization signal block and the first data.
  • the first terminal device determines whether to prioritize the first data or the side synchronization signal block according to the usage of the first resource and the relationship between the relative priorities of the first data and the side synchronization signal block. This method can ensure that the terminal device prioritizes more important information and reduce the impact on the system.
  • a communication device including: a processing unit, configured to determine M frequency domain resource sets, the M frequency domain resource sets including a first frequency domain resource set and a second frequency domain resource set, the second frequency domain resource set including frequency domain resources of sidelink synchronization signal resources, the first frequency domain resource set being other M-1 frequency domain resource sets except the second frequency domain resource set, where M is an integer greater than 1;
  • the transceiver unit is used to send a side synchronization signal block and a first signal in a first time unit.
  • the side synchronization signal block is located in a second frequency domain resource set, and the first signal is located in a first frequency domain resource set.
  • the first signal includes a physical side broadcast channel PSBCH, and the first signal is determined by an index of the frequency domain resource set.
  • the transceiver unit can perform the reception and transmission processing in the first, third and fifth aspects mentioned above, and the processing unit can perform other processing except reception and transmission in the first, third and fifth aspects mentioned above.
  • a communication device including: a transceiver unit, used to receive indication information from a first terminal device, the indication information indicating a first frequency domain resource set, and/or a second frequency domain resource set; a processing unit, used to determine the first frequency domain resource set, and/or the second frequency domain resource set according to the indication information; the transceiver unit is also used to receive a sidelink synchronization signal block on the second frequency domain resource set on the first time unit; wherein the second frequency domain resource set includes frequency domain resources of sidelink synchronization signal resources, the first frequency domain resource set is M-1 frequency domain resource sets among M frequency domain resource sets excluding the second frequency domain resource set, the M frequency domain resource sets are determined by the first terminal device, and M is an integer greater than 1.
  • the transceiver unit can perform the receiving and sending processing in the second and fourth aspects mentioned above, and the processing unit can perform other processing except receiving and sending in the second and fourth aspects mentioned above.
  • a communication device comprising a transceiver, a processor and a memory, wherein the processor is used to control the transceiver to receive and send signals, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the communication device executes a method in any possible implementation of the first to fifth aspects above.
  • the number of the processors is one or more, and the number of the memories is one or more.
  • the memory may be integrated with the processor, or the memory may be provided separately from the processor.
  • the communication device also includes a transmitter (transmitter) and a receiver (receiver).
  • a communication system comprising a first terminal device and a second terminal device.
  • a computer-readable storage medium stores a computer program or code, and when the computer program or code is run on a computer, the computer executes a method in any possible implementation of the first to fifth aspects above.
  • a chip comprising at least one processor, wherein the at least one processor is coupled to a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that a device equipped with the chip system executes a method in any possible implementation of the first to fifth aspects above.
  • the chip may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.
  • a computer program product comprising: a computer program code, when the computer program code is executed by a device, the device executes a method in any possible implementation of the first to fifth aspects above.
  • FIG. 1 and FIG. 2 are schematic diagrams of wireless communication systems applicable to embodiments of the present application.
  • FIG3 shows a schematic diagram of reserved resources.
  • FIG4 shows a schematic diagram of a side synchronization signal block S-SSB interruption UE1COT.
  • FIG5 is a flow chart of a communication method 500 provided in an embodiment of the present application.
  • FIG6 is a schematic diagram of a UE1COT provided in an embodiment of the present application.
  • FIG. 7 is a schematic diagram of another UE1COT provided in an embodiment of the present application.
  • Figure 8 shows a schematic diagram of mapping the first signal to the asynchronous resource block sets RB sets of UE1COT.
  • FIG. 9 is a flow chart of a communication method 900 provided in an embodiment of the present application.
  • Figure 10 is a schematic diagram of mapping the first signal to the synchronous time slot where the asynchronous RB sets of UE1COT are located provided by an embodiment of the present application.
  • Figure 11 is a schematic diagram of mapping the first signal to the synchronous time slot where the asynchronous RB sets of another UE1COT provided in an embodiment of the present application.
  • Figure 12 is a schematic diagram of mapping the first signal to the synchronous time slot where the asynchronous RB sets of another UE1COT provided in an embodiment of the present application.
  • Figure 13 is a schematic diagram of mapping the first signal to the synchronous time slot where the asynchronous RB sets of another UE1COT provided in an embodiment of the present application.
  • FIG. 14 is a flow chart of a communication method 1400 provided in an embodiment of the present application.
  • FIG. 15 is a schematic diagram of the structure of a communication device 1000 provided in an embodiment of the present application.
  • FIG. 16 is a schematic diagram of the structure of a communication device 2000 provided in an embodiment of the present application.
  • FIG. 17 is a schematic diagram of the structure of a chip system 3000 provided in an embodiment of the present application.
  • Figure 18 is a schematic diagram of sharing UE1COT with other synchronization source UEs for sending S-SSB synchronization resources provided by an embodiment of the present application.
  • the technical solution provided in this application can be applied to various communication systems, such as: the fifth generation (5th generation, 5G) or new radio (new radio, NR) system, long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, etc.
  • the technical solution provided in this application can also be applied to future communication systems, such as the sixth generation (6th generation, 6G) mobile communication system.
  • D2D device to device
  • V2X vehicle-to-everything
  • M2M machine to machine
  • MTC machine type communication
  • IoT Internet of things
  • V2X communication may include: vehicle-to-vehicle (V2V) communication, vehicle-to-roadside infrastructure (V2I) communication, vehicle-to-pedestrian (V2P) communication, and vehicle-to-network (V2N) communication.
  • V2V refers to communication between vehicles.
  • V2P refers to communication between vehicles and people (including pedestrians, cyclists, drivers, or passengers, etc.).
  • V2I refers to communication between vehicles and infrastructure, such as roadside units (RSU) or network equipment.
  • RSU roadside units
  • RSU includes two types: terminal-type RSU, which is in a non-mobile state because it is located on the roadside and does not need to consider mobility; base station-type RSU, which can provide timing synchronization and resource scheduling for vehicles communicating with it.
  • V2N refers to communication between vehicles and network equipment. It can be understood that the above is an exemplary description and the embodiments of the present application are not limiting.
  • V2X may also include V2X communications based on the NR system of the current 3GPP Rel-16 and subsequent versions.
  • the terminal device in the embodiment of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user device.
  • UE user equipment
  • the terminal device may be a device that provides voice/data to users, for example, a handheld device or a vehicle-mounted device with a wireless connection function.
  • some examples of terminals are: mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, wearable devices, terminal devices in 5G networks or terminal devices in future evolved public land mobile communication networks (PLMNs), etc.
  • the application examples are not limited to this.
  • the terminal device may also be a wearable device.
  • Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized, and fully or partially independent of smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.
  • the device for realizing the function of the terminal device i.e., the terminal device
  • the terminal device can be the terminal device, or a device capable of supporting the terminal device to realize the function, such as a chip system or a chip, which can be installed in the terminal device.
  • the chip system can be composed of a chip, or can include a chip and other discrete devices.
  • the network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may also be referred to as an access network device or a wireless access network device, such as a base station.
  • the network device in the embodiment of the present application may refer to a wireless access network (RAN) node (or device) that connects a terminal device to a wireless network.
  • RAN wireless access network
  • Base station can broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmitting point (TRP), transmitting point (TP), master station, auxiliary station, multi-standard wireless (motor slide retainer, MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc.
  • NodeB evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmitting point (TRP), transmitting point (TP), master station, auxiliary station, multi-standard wireless (motor slide retainer, MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node,
  • the base station may be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof.
  • the base station may also refer to a communication module, a modem or a chip used to be arranged in the aforementioned device or apparatus.
  • the base station may also be a mobile switching center and a device that performs the base station function in D2D, V2X, and M2M communications, a network-side device in a 6G network, and a device that performs the base station function in a future communication system.
  • the base station may support networks with the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network equipment.
  • Base stations can be fixed or mobile.
  • a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station.
  • a helicopter or drone can be configured to act as a device that communicates with another base station.
  • the network device mentioned in the embodiments of the present application may be a device including a CU, or a DU, or a device including a CU and a DU, or a device including a control plane CU node (central unit control plane (central unit-control plane, CU-CP)) and a user plane CU node (central unit user plane (central unit-user plane, CU-UP)) and a DU node.
  • CU-CP central unit control plane
  • CU-UP central unit user plane
  • the device for realizing the function of the network device can be a network device, or a device capable of supporting the network device to realize the function, such as a chip system or a chip, which can be installed in the network device.
  • the chip system can be composed of a chip, or can include a chip and other discrete devices.
  • the network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on aircraft, balloons and satellites in the air.
  • the embodiments of the present application do not limit the scenarios in which the network equipment and terminal equipment are located.
  • the technical solution of the present application is mainly used in the side transmission scenario, and the frequency bands used include but are not limited to unlicensed spectrum, which includes frequency bands near 2.4 GHz and frequency bands near 5.8 GHz.
  • the terminal device and the access network device can use unlicensed spectrum resources for wireless communication (for example, transmitting uplink information or transmitting downlink information).
  • the communication system can adopt licensed-assisted access (LAA), dual connectivity (DC), unlicensed assisted access (standalone) technology, etc.
  • FIG. 1 and FIG. 2 a communication system applicable to an embodiment of the present application is briefly introduced in conjunction with FIG. 1 and FIG. 2 .
  • Figures 1 and 2 are schematic diagrams of a wireless communication system applicable to an embodiment of the present application.
  • the wireless communication system may include at least one terminal device, such as UE1, UE2, UE3, UE4, and UE5 as shown in the figure.
  • the wireless communication system may also include at least one network device, such as the network device shown in the figure.
  • the network device and the terminal device can communicate with each other. If the network device and the terminal device can communicate with each other through the Uu interface, the link between the network device and the terminal device can be recorded as the Uu link. As shown in FIG1(a) or FIG2(a), the network device and UE1 can communicate directly, and as shown in FIG1(b) or FIG2(b), the network device and UE1 can also communicate with each other through UE2; Similarly, the network device and UE2 can communicate directly, and the network device and UE2 can also communicate through UE1. It can be understood that the Uu link represents a connection relationship between the terminal device and the network device, which is a logical concept rather than a physical entity. The main link is only named for distinction, and its specific naming does not limit the scope of protection of this application.
  • Terminal devices can also communicate with each other.
  • terminal devices can communicate directly with each other, as shown in Figure 1 (a) to Figure 1 (c), Figure 2 (a) to Figure 2 (c), UE1 and UE2 can communicate directly.
  • terminal devices can communicate with each other through other devices, such as network devices or terminal devices.
  • UE1 and UE2 can communicate through network devices, and as shown in Figure 1 (d) and Figure 2 (d), UE1 and UE2 can communicate through UE3.
  • the interface for communication between terminal devices can be recorded as a proximity-based services communication 5 (PC5) interface
  • the link for communication between terminal devices can be recorded as a sidelink SL
  • the communication between terminal devices can also be recorded as SL communication.
  • PC5 proximity-based services communication 5
  • Sidelinks can also be called side links or sidelinks, etc. It can be understood that the sidelink represents a connection relationship between terminal devices and terminal devices, and is a logical concept rather than a physical entity. The side link is named only for distinction, and its specific naming does not limit the protection scope of this application.
  • Unicast communication can be performed between devices, such as between terminal devices.
  • Unicast means that a sending terminal and a receiving terminal form a unicast connection pair.
  • UE1 and UE2 can perform unicast communication.
  • Multicast communication can be performed between devices, such as multicast communication can be performed between terminal devices.
  • Multicast means that a sending terminal and at least one receiving terminal form a multicast connection pair.
  • multicast communication can be performed between UE1 and UE2, UE4 and UE5.
  • the network device and UE1 can communicate directly, and one UE1 can communicate with multiple UEs, such as UE2, UE4 and UE5.
  • UE1 performs multicast communication with multiple UEs, it can be performed under network coverage, as shown in Figure 2 (a) or Figure 2 (b), or it can be performed without network coverage, as shown in Figure 2 (c) or Figure 2 (d).
  • Figure 2 uses the example of UE1 performing multicast communication with three UEs for illustrative purposes, and there is no limitation to this.
  • UE1 can perform multicast communication with a larger number of UEs.
  • SL communication between terminal devices can be used in vehicle networking or intelligent transportation system (ITS), such as V2X communication mentioned above.
  • ITS intelligent transportation system
  • SL communication between terminal devices can be performed under network coverage or without network coverage.
  • UE1 and other UEs can communicate under network coverage; or, as shown in Figure 1(c) to Figure 1(d) and Figure 2(c) to Figure 2(d), UE1 and other UEs can communicate outside network coverage (out-of-coverage).
  • the configuration information during SL communication between terminal devices may be configured or scheduled by the network device, or may be independently selected by the terminal device without restriction.
  • Figures 1 and 2 are simplified schematic diagrams for ease of understanding, and the wireless communication system may also include other network devices or other terminal devices, which are not shown in Figures 1 and 2.
  • the embodiments of the present application may be applicable to any communication scenario in which a transmitting device and a receiving device communicate.
  • the embodiments of the present application do not particularly limit the specific structure of the execution subject of the method provided by the embodiments of the present application.
  • the execution subject of the method provided by the embodiments of the present application may be a terminal device, or a functional module in the terminal device that can call and execute the program.
  • the spectrum used by wireless communication systems is divided into two categories, licensed spectrum and unlicensed spectrum.
  • licensed spectrum UE can use spectrum resources based on the scheduling of network equipment.
  • unlicensed spectrum communication devices can use spectrum resources in a competitive manner.
  • SL communication on the unlicensed spectrum can be called SL-U
  • NR cellular communication on the unlicensed spectrum can be called NR-U.
  • communication devices compete for channels in a listen-before-talk (LBT) manner, thereby using unlicensed spectrum resources.
  • LBT listen-before-talk
  • SL-U mainly refers to SL transmission in unlicensed spectrum.
  • the standard introduces two access mechanisms including Type 1 and Type 2.
  • Type 1 is used for channel preemption scenarios and requires LBT, that is, monitoring before transmission. The monitoring here can be energy detection, that is, detecting energy at 9 ⁇ s. If it exceeds the threshold, it means that a UE occupies the resource; otherwise, If it does not exceed the threshold, it means that no UE occupies the resource.
  • Type 2 is used to share the transmission resources grabbed by other UEs through Type 1. For example, UE1 grabs a transmission opportunity within a period of time (called COT) using Type 1. In addition to the transmission time occupied by itself, it can instruct other UEs to use Type 2 to access the remaining transmission opportunities in the COT occupied by UE1.
  • COT period of time
  • Type 2 further includes Type 2A and Type 2B.
  • Type 2A means that the channel is occupied 25 ⁇ s after the transmission of other UEs is completed. That is, by sensing the channel, it is found that no other UE uses it within 25 ⁇ s, and then the channel can be occupied.
  • Type 2B means that the channel is occupied 16 ⁇ s after the transmission of other UEs is completed. The difference from Type 2A is 9 ⁇ s, which is the duration of a sensing time slot.
  • SL transmission is based on resource pools.
  • Each resource pool contains one or more subchannels.
  • the frequency domain resources i.e., the number of physical resource blocks (PRBs)
  • PRBs physical resource blocks
  • the resource pool may also include the location and number of time slots occupied for SL transmission in the time domain.
  • the method of determining resources in the resource selection window can be performed on one resource pool or on multiple resource pools, and the present application does not impose any restrictions on this.
  • a resource pool can be a physical concept or a logical concept.
  • a resource pool includes multiple physical resources, any of which is used to transmit data. Each UE needs to select a resource from the resource pool when transmitting data.
  • the resource determination process includes the following two situations:
  • the UE is controlled by the network device and selects a resource from the resource pool for data transmission according to the instruction information of the network device, which is also called Mode 1.
  • the UE autonomously selects a resource from the resource pool for data transmission, also known as Mode 2, that is, the UE has the opportunity to autonomously determine resource determination and resource allocation.
  • the UE can exclude some occupied or highly interfered resources based on the perceived spectrum occupancy and select transmission resources on idle or less interfered resources.
  • Data or information can be carried through time and frequency resources.
  • the time domain resource may include one or more time domain units (or may also be referred to as time units).
  • a time unit may include several time domain resources.
  • the time domain unit is, for example, a radio frame (RF), and the time domain resources included in the time domain unit are, for example, a subframe, a frame, a half subframe or a half frame, a slot, a mini-slot, a partial slot, or an orthogonal frequency division multiplexing (OFDM) symbol, etc.; or, the time domain unit may also be a collection of one or more time domain resources, for example, the time domain unit is one or more OFDM symbols in a time slot, for example, the number of the one or more is 6, 7, 12 or 14, etc.
  • One or more time units may be continuous or discrete in time.
  • time domain resources may also be referred to as sub-time domain units, or, "time domain resources” and “sub-time domain units” may be the same concept and may be interchangeable.
  • frequency domain resources may include one or more frequency domain units.
  • a frequency domain unit may be a resource element (RE), or a resource block (RB), or a resource block set (RB set), or a subchannel, or a resource pool, or a bandwidth, or a bandwidth part (BWP), or a carrier, or a channel, or an interlace RB, etc.
  • RE resource element
  • RB resource block
  • RB set resource block set
  • BWP bandwidth part
  • carrier or a channel, or an interlace RB, etc.
  • the UE may send multiple services at the same time, and the priorities of the multiple services may be different. Therefore, the priority of the UE can also be described as the service priority of the UE.
  • the service priority of the UE is specifically the sending priority of the UE, or the transmission priority of the UE.
  • the sending priority can also be called the transmission priority or simply the priority, and the present invention does not limit this.
  • Service priority can also be called L1 priority, physical layer priority, priority carried in sidelink control information (SCI), priority corresponding to the physical side link shared channel (PSSCH) associated with SCI, transmission priority, priority for sending PSSCH, priority for resource determination, priority of logical channel, and highest priority of logical channel.
  • the priority level and priority value may have a certain correspondence, such as priority The higher the level, the lower the corresponding priority value, or the lower the priority level, the lower the corresponding priority value. Taking the higher the priority level, the lower the corresponding priority value as an example, the priority value range can be an integer from 1 to 8 or an integer from 0 to 7. If the priority value range is 1 to 8, then when the priority value is 1, it represents the highest level of priority.
  • the priority level and the priority value may have a certain correspondence relationship, for example, a higher priority level corresponds to a lower priority value, or a lower priority level corresponds to a lower priority value.
  • the priority value may range from 1 to 4, and the smaller the value, the higher the priority.
  • the UE determines the duration of LBT based on different channel access priorities CAPC, as described in Table 4.2.1-1 of TS 37.213.
  • CAPC channel access priorities
  • the maximum COT duration that can be occupied is 2 ms.
  • CAPC is 2
  • the maximum COT duration that can be occupied is 4 ms.
  • CAPC is 3 or 4
  • the maximum COT duration that can be occupied is 6 ms or 10 ms.
  • Channel occupancy refers to the transmission of a UE on one or more channels after performing the channel access process. If a UE obtains the right to use a channel through LBT, the UE can occupy the channel for a period of time, which can be called COT.
  • COT can be a time concept, that is, the time of SL transmission; it can also be a resource concept, that is, the time-frequency resources occupied by SL transmission.
  • T mcot,p The COT transmission of the UE cannot exceed the maximum channel occupancy time (MCOT), which is denoted as T mcot,p .
  • T mcot,p the maximum channel occupancy time
  • CW p in Table 1 and Table 2 is the contention window
  • CW min,p is the minimum value of the contention window
  • CW max,p is the maximum value of the contention window.
  • the synchronization source is a timing reference source used to achieve time and frequency synchronization.
  • the type of synchronization source includes at least one of the following: a global navigation satellite system (GNSS), a terminal device synchronized to the GNSS, a network device, a terminal device, etc.
  • the network device may be an eNB, and/or a gNB.
  • the reserved resources in the embodiments of the present application refer to resources reserved for transmitting data or information, including time domain resources and frequency domain resources.
  • the reserved resources can be distributed periodically, and the time interval between two adjacent reserved resources can be called a reservation period, or a resource reservation period, or a resource reservation interval.
  • FIG3 shows a schematic diagram of reserved resources.
  • R1 is a resource for transmitting the first data (illustrated by a solid line in the figure), including time domain resources and frequency domain resources for the first data
  • R2, R3 and R4 are reserved resources corresponding to the first data (illustrated by a dotted line in the figure). It can be understood that FIG3 shows three reserved resources corresponding to the transmission of the first data, but in actual transmission, the first data may only correspond to There may be one or two reserved resources, or there may be four or more reserved resources, which is not limited in this application.
  • the reserved resources corresponding to the first data are resources determined according to the frequency domain resources, time domain resources for transmitting the first data, and the reserved period indicated by the SCI corresponding to the first data. is received, and the time slot where the reserved resource corresponding to the first data is
  • q is a positive integer
  • m is the time slot where the first data is located
  • P'rsvp_RX is the reservation period of the first data.
  • Prsvp_RX is the reservation period indicated by the SCI of the first data, in milliseconds (ms)
  • P'rsvp_RX is the reservation period on the logical time slot converted from the reservation period indicated by Prsvp_RX.
  • the frequency domain resources in the reserved resources corresponding to the first data are the same as the frequency domain resources of the first data.
  • whether the selection window for sending data includes the resource of the synchronization signal or the candidate synchronization signal is determined based on the period of the synchronization signal or the candidate synchronization signal.
  • the information for determining the position where the candidate synchronization signal appears in the selection window is the time-frequency position of the synchronization signal or the candidate synchronization signal, and the period of the synchronization signal.
  • S-SSB Sidelink-synchronization signal block
  • Synchronous communication requires that the sender and receiver have synchronous clock signals of the same frequency and phase, or timing information.
  • the sender and receiver establish synchronization, and then send/receive under the control of the synchronous clock.
  • the present application is applicable to sidelink communication scenarios, so the synchronization signals mentioned below are all S-SSBs.
  • S-SSB can be referred to as a synchronization signal or a synchronization signal block, etc. It should be understood that the name of S-SSB is only an example and does not constitute any limitation on the technical solution of the present application.
  • S-SSB includes: a side master synchronization signal S-PSS, a side slave synchronization signal S-SSS, and a physical side broadcast channel PSBCH.
  • the bandwidth of S-SSB is predefined, configured or preconfigured. For example, its bandwidth is 11PRB, or its maximum bandwidth is 20PRB.
  • the number of symbols occupied by S-SSB is also predefined, configured or preconfigured. For example, for a normal CP, S-SSB can occupy 13 symbols, and for an extended CP, S-SSB can occupy 13 symbols. For another example, regardless of normal CP or extended CP, S-SSB occupies 4 symbols.
  • S-SSB may also include symbols for automatic gain control AGC.
  • terminal devices need to select physical resources for data transmission in the resource pool. For example, terminal devices can seize channels by listening before talking (LBT), or share resources obtained after other terminal devices seize channels to transmit data.
  • LBT listening before talking
  • the S-SSB configured on the resource pool occupies one RB set1, such as 20MHz. If the COT obtained by the terminal device through Type 1 LBT overlaps with the resource position occupied by the configured S-SSB, the COT will be interrupted, thereby affecting the transmission performance. This is because the time unit where the configured S-SSB is located can only be used to send and receive S-SSB, not to transmit data; and other frequency domain resources on the time unit where the S-SSB is located cannot be used to send other signals or channels. Therefore, the resources occupied by the configured S-SSB and all frequency domain resources on the time unit where the configured S-SSB is located need to be vacated from the resource pool for data transmission.
  • the S-SSB sent on the ARFCN used for synchronization is referred to as the S-SSB used for synchronization.
  • the ARFCN used for synchronization is configured by signaling.
  • FIG4 shows a schematic diagram of the COT of UE1 interrupted by the side synchronization signal block S-SSB.
  • the frequency domain resources e.g., RB set
  • the frequency domain resources including the S-SSB configured on the resource pool are referred to as synchronous RB set.
  • RB set1 in FIG4 (a) and FIG4 (b); other RB sets on the resource pool except the synchronous RB set are referred to as asynchronous RB sets, such as RB set2 in FIG4 (b).
  • the configuration signaling includes the number of synchronous resources of the S-SSB on the resource pool, the offset value between the synchronous resources, and the frequency domain position of the synchronous resources.
  • the period of the configured S-SSB can be predefined or indicated by the signaling.
  • its period is fixed at 160ms.
  • the synchronous RB set includes the time-frequency resources of the complete S-SSB.
  • the synchronous RB set and the asynchronous RB set are only for the convenience of description in this specification and do not constitute corresponding limitations.
  • a partial or complete S-SSB can also be sent on an asynchronous RB set.
  • the transmitter of the terminal device may send S-SSB on a synchronous RB set or an asynchronous RB set, and the receiver of the terminal device may receive S-SSB on a synchronous RB set or an asynchronous RB set, and the present invention does not limit this.
  • the synchronous RB set may include a complete S-SSB signal within its bandwidth.
  • the asynchronous RB set may include a complete or partial S-SSB signal within its bandwidth.
  • the COT of UE1 occupies RB set1, and the frequency domain resource position where the S-SSB configured by the resource pool (for example, including S-SSB1 and S-SSB2) is located is also located in RB set1, and the two overlap in RB set1.
  • the bandwidth of the RB set1 can be 20MHz, a preset value, or a configured value.
  • the RB set1 includes 4 subchannels, and the bandwidth of each subchannel is 5MHz. Therefore, the COT of UE1 will be interrupted, so that UE1 can only transmit data on the RB set1 before the time unit where S-SSB1 is located.
  • the COT1 of UE1 occupies RB set1 and RB set2, and the frequency domain resource position where the S-SSB configured by the resource pool (for example, including S-SSB1 and S-SSB2) is located is also located in RB set1, and the two overlap in RB set1.
  • the bandwidth of the RB set1 and RB set2 can be 20MHz, a preset value, or a configured value. Therefore, the COT of UE1 will be interrupted, so that Therefore, UE1 can only transmit data on RB set1 and RB set2 before the time unit where S-SSB1 is located.
  • FIG4 is only an example given for ease of understanding and should not constitute any limitation on the technical solution of the present application.
  • the number of asynchronous RB sets in FIG4 may be multiple, and the S-SSB resources on the synchronous RB set may be one or more.
  • the synchronous RB set may be any one of multiple RB sets on the resource pool, and the present application does not limit this.
  • UE1 accesses the channel through Type 1 LBT, it consumes a lot of time and power consumption. Once the access is successful, UE1 should perform side transmission on the obtained COT as much as possible. Based on the situation where the S-SSB of the above resource pool causes the COT of UE1 to be interrupted, in order to ensure the complete transmission of data, UE1 needs to restart the Type 1 LBT process, which will lead to uncertainty in the timing of subsequent data transmission and increase in transmission delay. Moreover, from the perspective of the entire system, considering that the configured S-SSB appears every 160ms, this will cause a significant decrease in the performance and efficiency of the entire system.
  • the present application provides a communication method and device, which uses S-SSB resources as part of UE1COT, thereby avoiding interruption of UE1COT, thereby improving system transmission performance, reducing transmission delay, etc.
  • At least one means one or more, and “more than one” means two or more.
  • “And/or” describes the association relationship of associated objects, indicating that three relationships may exist.
  • a and/or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.
  • the character “/” generally indicates that the associated objects before and after are in an "or” relationship.
  • “At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items.
  • At least one of a, b and c can mean: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c.
  • a, b and c can be single or multiple, respectively.
  • first”, “second” and various numerical numbers indicate distinctions made for ease of description and are not used to limit the scope of the embodiments of the present application. For example, to distinguish between different messages, etc., rather than to describe a specific order or sequence. It should be understood that the objects described in this way can be interchanged where appropriate so as to be able to describe solutions other than the embodiments of the present application.
  • used for indication may include being used for direct indication and being used for indirect indication.
  • indication information may include that the indication information directly indicates A or indirectly indicates A, but it does not mean that the indication information must carry A.
  • the indication method involved in the embodiments of the present application should be understood to include various methods that can enable the party to be indicated to know the information to be indicated.
  • the information to be indicated can be sent as a whole or divided into multiple sub-information and sent separately, and the sending period and/or sending time of these sub-information can be the same or different.
  • the present application does not limit the specific sending method.
  • the "indication information" in the embodiments of the present application may be an explicit indication, i.e., directly indicated by signaling, or obtained by combining other rules or other parameters or by deduction according to the parameters indicated by the signaling. It may also be an implicit indication, i.e., obtained according to a rule or relationship, or according to other parameters, or by deduction. The present application does not make specific restrictions on this.
  • protocol may refer to a standard protocol in the field of communications, such as 5G protocol, NR protocol, and related protocols used in future communication systems, which are not limited in this application.
  • Predefined may include pre-definition. For example, protocol definition.
  • Preconfiguration can be implemented by pre-saving corresponding codes, tables, or other methods that can be used to indicate relevant information in the device, and this application does not limit its specific implementation method.
  • storage may refer to storage in one or more memories.
  • the one or more memories may be separately set or integrated in an encoder or decoder, a processor, or a communication device.
  • the one or more memories may also be partially separately set and partially integrated in a decoder, a processor, or a communication device.
  • the type of memory may be any form of storage medium, which is not limited in this application.
  • configuration can be signaling configuration, and can also be described as configuration signaling.
  • the signaling configuration includes configuration by signaling sent by the base station, and these signalings can be radio resource control (RRC) messages, downlink control information (DCI), or system information blocks (SIB).
  • RRC radio resource control
  • DCI downlink control information
  • SIB system information blocks
  • the signaling configuration can also be configured to the terminal device by pre-configured signaling, or configured to the terminal device in a pre-configured manner.
  • the pre-configuration here is to define or configure the values of the corresponding parameters in advance in a protocol manner, and store them in the terminal device when communicating with the terminal device.
  • the pre-configured message can be modified or updated under the condition that the terminal device is connected to the network.
  • the signaling configuration can limit the values of the relevant parameters or the configuration information to the resource pool sent or received by the terminal device.
  • the resource pool is a collection of resources used for transmission on a specific carrier or bandwidth portion.
  • the number M of frequency domain resource sets may be predefined by the standard, configured by a network device/other UE, or preconfigured by the first terminal device at the factory, etc., and the present application does not impose any limitation on this.
  • Fig. 5 is a flow chart of a communication method 500 provided in an embodiment of the present application. As shown in Fig. 5, the method includes the following steps.
  • the first terminal device obtains the channel occupancy time COT.
  • the first terminal device is a synchronization source. That is, the first terminal device can be used as a terminal device that sends a side synchronization signal block for exemplary description.
  • the first terminal device can obtain COT through Type 1 LBT or Type 2.
  • Type 1 LBT Type 1 LBT
  • Type 2 Type 2
  • the current solution for obtaining COT please refer to the current solution for obtaining COT.
  • no further details are given here.
  • the COT includes sideline synchronization signal resources, which include first synchronization resources and/or second synchronization resources.
  • the first synchronization resource is used for the first terminal device to send a sideline synchronization signal
  • the second synchronization resource is used for the first terminal device to receive a sideline synchronization signal.
  • the first terminal device sends a sideline synchronization signal on a first synchronization resource; and/or the first terminal device receives a sideline synchronization signal on a second synchronization resource.
  • the value of the number N of side synchronization signal resources is 2 or 3.
  • the number of side synchronization signal resources may be configured or pre-configured. For example, when N is 2, there is 1 first synchronization resource (e.g., S-SSB1) and 1 second synchronization resource (e.g., S-SSB2); for another example, when N is 3, there is 1 first synchronization resource (e.g., S-SSB1) and 2 second synchronization resources (e.g., S-SSB2 and S-SSB3), etc., which is not limited in the present application.
  • S-SSB1, S-SSB2, and S-SSB3 may be the same, but the time domain resources are different, and S-SSB1, S-SSB2, and S-SSB3 are time division resources, and S-SSB1, S-SSB2, and S-SSB3 may be continuous or discontinuous, which is not limited in the present application.
  • side synchronization signal resource or resources UE1 uses to send S-SSB or receive S-SSB is relative.
  • Two synchronization resources (for example, the first synchronization resource and the second synchronization resource) are set here to avoid the situation where UE1 cannot receive S-SSB on the same resource when sending S-SSB under the restriction of half-duplex.
  • UE1 can send S-SSB on one of the synchronization resources while receiving S-SSB on other N-1 synchronization resources.
  • the first synchronization resource and the second synchronization resource of the present application may overlap in the time domain and may be the same or different in the frequency domain.
  • the first synchronization resource and the second synchronization resource may be exactly the same, and the present application does not limit this.
  • the side synchronization signal resource is used for receiving and/or sending the side synchronization signal
  • the side synchronization signal resource can also be called: S-SSB resource, synchronization signal resource, side synchronization signal resource, synchronization resource, side signal synchronization resource, S-SSB Burst, etc.
  • S-SSB resource for example, S-SSB1, S-SSB2 or S-SSB3
  • the transmission resources of S-SSB can appear periodically in the time domain, or can appear in a trigger-based or event-based manner.
  • the transmission period can be predefined, configured or preconfigured. For example, the period value is 40ms, 80ms, 160ms, etc.
  • the side signal may be an S-SSB.
  • the S-SSB includes a master synchronization signal S-PSS, a slave synchronization signal S-SSS and a side broadcast channel PSBCH.
  • the S-SSB may be referred to as a synchronization signal, a side synchronization signal, or a side signal, etc.
  • the above names are only examples and should not constitute any limitation on the technical solution of the present application.
  • the S-SSB may be composed of a predetermined number of symbols in the time domain and occupy a preset bandwidth in the frequency domain. For example, the S-SSB includes 14 symbols in the time domain and occupies 20 PRBs in the frequency domain.
  • the S-SSB includes 13 or 11 symbols in the time domain and occupies 11 PRBs in the frequency domain.
  • the S-SSB may include AGC symbols and/or empty symbols in the time domain, or may not include them. The present application does not impose any restrictions on this.
  • the COT occupies M frequency domain resource sets, the M frequency domain resource sets include a first frequency domain resource set, the second frequency domain resource set includes frequency domain resources of sideline synchronization signal resources, and the first frequency domain resource set is other than the second frequency domain resource set.
  • M-1 frequency domain resource sets where M is an integer greater than 1.
  • the M frequency domain resource sets also include a second frequency domain resource set.
  • the first frequency domain resource set is an asynchronous RB set; the second frequency domain resource set is a synchronous RB set. That is, the COT of UE1 occupies one or more asynchronous RB set(s), and optionally, the COT also includes a synchronous RB set.
  • a first terminal device sends data, or a signal associated with a sideline synchronization signal block, on a first frequency domain resource set on a first time unit, where the first time unit is a time unit where a first synchronization resource in a second frequency domain resource set is located.
  • the signal associated with the sidelink synchronization signal block may be one or more of a sidelink primary synchronization signal S-PSS, a sidelink slave synchronization signal S-SSS, or a sidelink physical broadcast channel PSBCH.
  • the first terminal device obtains second information, and the second information indicates that the first frequency domain resource set on the first time unit is used to send data, or a signal associated with a side synchronization signal block.
  • the second information may be predefined or configured by the base station. Based on the second information, the first terminal device may send data on the first frequency domain resource set on the first time unit, or a signal associated with a side synchronization signal block, thereby avoiding COT interruption of UE1, improving system transmission performance, reducing transmission delay, etc.
  • a first terminal device sends third information to a second terminal device, the third information indicating that a first frequency domain resource set on a second time unit is used for the second terminal device to send or receive data, or a signal associated with a side synchronization signal block, and the second time unit is a time unit where a second synchronization resource in the second frequency domain resource set is located.
  • the first terminal device obtains fourth information, and the fourth information is used to indicate that the first frequency domain resource set on the second time unit is used to receive data, or a signal associated with a side synchronization signal.
  • the fourth information may be predefined or configured by the base station. Based on the fourth information, the first terminal device and/or the second terminal device may receive data on the first frequency domain resource set on the second time unit, or a signal associated with a side synchronization signal block, thereby avoiding COT interruption of UE1, improving system transmission performance, reducing transmission delay, etc.
  • the first terminal device can determine the Nc candidate synchronization resources included in the first synchronization resource and/or the second synchronization resource on the resource pool. At the same time, if there may be Na overlapping candidate synchronization resources between the COT of the first terminal device and the first synchronization resource and/or the second synchronization resource on the resource pool, the first terminal device can indicate to the second terminal device through the first information which resources in the COT are sending resources and which resources are receiving resources, so as to avoid interruption of the COT and ensure system transmission performance.
  • the above Na overlapping candidate synchronization resources can be used as the sideline synchronization signal resources indicated by the first information, and Na is less than or equal to Nc.
  • the first information indicates that part or all of the overlapping candidate synchronization resource may be the first synchronization resource or the second synchronization resource.
  • the first terminal device may indicate to the second terminal device that within Na synchronization resource, resources on the first synchronization resource and the second synchronization resource are used for sending and/or receiving S-SSB resources.
  • the first terminal device instructs the second terminal device to send a side synchronization signal on one or more second synchronization resources.
  • the first terminal device includes a GAP of a first duration before receiving or instructing the second terminal device to send the sideline synchronization signal.
  • the GAP is a time not used for sending or receiving, and the GAP of the first duration is predefined, configured or preconfigured, and the size of the GAP of the first duration can be 16 ⁇ s or 25 ⁇ s, etc.
  • the first information is COT shared information sent by the first terminal device.
  • a transmission period of the resource pool includes N side synchronization signal resources, and the transmission period can be 160ms.
  • N 3, that is, it includes 3 side synchronization signal resources, namely resource 1, resource 2 and resource 3, wherein resource 1 is the first synchronization resource, and resource 2 and resource 3 are the second synchronization resources.
  • the first synchronization resource is a sending resource
  • the second synchronization resource is a receiving resource
  • the first synchronization resource is a receiving resource
  • the second synchronization resource is a sending resource
  • Each side synchronization signal resource includes Nc candidate synchronization resources, Nc is a positive integer, and Nc candidate synchronization resources are configured, pre-configured, or reserved in the resource pool through signaling.
  • Nc is a positive integer
  • Nc candidate synchronization resources are configured, pre-configured, or reserved in the resource pool through signaling.
  • UE1 can share the sending resources and receiving resources of the overlapping Na resources in UE1COT with other UE2 through the first information, where the sending resources are used for UE1 to send S-SSB signals, and the receiving resources are shared with other synchronization source UEs for
  • the synchronization resource for sending S-SSB can be used by other UE2 to send S-SSB signals to UE1.
  • UE1 can receive the S-SSB signal sent by UE2 on the receiving resource.
  • the first terminal device sends first information to the second terminal device
  • the second terminal device receives the first information from the first terminal device.
  • the first information indicates the sideline synchronization signal resource.
  • the first information includes P bits, and the i-th bit in the P bits is used to indicate that the i-th sideline synchronization signal resource in the N sideline synchronization signal resources is the first synchronization resource or the second synchronization resource.
  • the first information includes ceil(log 2 (N)) bits, which are used to indicate the first synchronization resource and/or the second synchronization resource among the N sideline synchronization signal resources, wherein ceil(x) represents rounding up x.
  • the first terminal device sends side control information (e.g., SCI) to the second terminal device, and the side control information includes first information; in another example, the first terminal device sends a media access control element MAC CE to the second terminal device, and the MAC CE includes the first information; in yet another example, the first terminal device sends side control information and MAC CE to the second terminal device, and the side control information and MAC CE include the first information.
  • side control information e.g., SCI
  • MAC CE media access control element
  • MAC CE includes the first information
  • the first terminal device sends side control information and MAC CE to the second terminal device, and the side control information and MAC CE include the first information.
  • the second terminal device receives or sends a side synchronization signal according to the first information.
  • the first terminal device regards the S-SSB resources as part of the COT and indicates it through indication information; further, the first terminal device also indicates which resources among the configured S-SSB resources are sending resources and which resources are receiving resources, so as to avoid interruption of the COT and ensure system transmission performance.
  • FIG6 is a schematic diagram of a UE1 COT provided in an embodiment of the present application.
  • UE1 is a synchronous S-SSB transmitting UE
  • the COT of UE1 occupies an RB set1, assuming that the bandwidth of RB set1 is 20MHz, and the RB set1 includes 4 subchannels, then the bandwidth of each subchannel is 5MHz.
  • UE1 may send COT sharing indication information via SCI and/or MAC CE signaling to indicate the transmit and receive status of S-SSB1 and/or S-SSB2.
  • UE1 may use 2 bits to indicate the transceiver status of S-SSB1 and S-SSB2, respectively. For example, a value of "1" indicates that S-SSB1 is a resource for sending S-SSB, and a bit of "0" indicates that S-SSB2 is a resource for receiving S-SSB.
  • UE1 may use 1 bit to jointly indicate the transceiver status of S-SSB1 and S-SSB2. For example, a value of "1" indicates that S-SSB1 is a resource for sending S-SSB, and S-SSB2 is a resource for receiving S-SSB; or a value of "0" indicates that S-SSB1 is a resource for receiving S-SSB, and S-SSB2 is a resource for sending S-SSB.
  • UE1 may also use 1 bit to indicate the transceiver status of S-SSB1, and the transceiver status of S-SSB2 is opposite to the transceiver status of S-SSB1 by default.
  • the value "1" only indicates that S-SSB1 is a resource for sending S-SSB.
  • Other UE2 that share the COT of UE1 can indirectly determine that S-SSB2 is a resource for receiving S-SSB; or, the value "0" only indicates that S-SSB2 is a resource for receiving S-SSB.
  • Other UE2 that share the COT of UE1 can indirectly determine that S-SSB1 is a resource for sending S-SSB, etc.
  • the COT of UE1 occupies one RB set2. Assuming that the bandwidth of RB set2 is 20 MHz, and the RB set1 includes 4 subchannels, the bandwidth of each subchannel is 5 MHz.
  • UE1 can send COT sharing indication information through SCI and/or MAC CE signaling to indicate the transceiver status of one or more of S-SSB1, S-SSB2, and S-SSB3.
  • the specific indication method can refer to (a) of Figure 6.
  • UE1 can use 3 bits to indicate the transceiver status of S-SSB1, S-SSB2, and S-SSB3 respectively; or, UE1 can use 2 bits to indicate the transceiver status of S-SSB1, S-SSB2, and S-SSB3 respectively; or, UE1 can also use 1 bit to indicate the transceiver status of S-SSB1, and the transceiver status of S-SSB2 and S-SSB3 is the same, and opposite to the transceiver status of S-SSB1, etc. For the sake of brevity, it will not be described in detail here.
  • UE1 can determine the receiving and transmitting status of S-SSB1, S-SSB2 and S-SSB3 according to the type of synchronization source.
  • the type of synchronization source includes but is not limited to: GNSS, a terminal device synchronized to the GNSS, a network device, a terminal device, etc.
  • the network device may be an eNB and/or a gNB.
  • UE1 determines, according to the type of synchronization source, that S-SSB1 and S-SSB2 are used for UE1 to send S-SSB, and S-SSB3 is used for UE1 and/or UE2 to receive S-SSB.
  • the determination of the transceiver status of at least one of the above side synchronization signal resources S-SSB1, S-SSB2 and S-SSB3 is the implementation behavior of UE1 itself, which may be similar to the transceiver status of the S-SSB resources configured in the resource pool. This application does not limit this.
  • UE1 can send S-SSB on S-SSB 1, and UE1 or UE2 can receive S-SSB on S-SSB2 and/or S-SSB3.
  • the transmission resources of S-SSB are used as part of the COT of UE1, which can avoid the interruption of COT, improve the system transmission performance, reduce the transmission delay, etc.
  • Figure 7 takes the COT of UE1 including the configured S-SSB's synchronization RB set2 and the synchronization RB set2 not including the configured S-SSB as an example to illustrate the technical solution of the present application.
  • FIG7 is a schematic diagram of another UE1 COT provided in an embodiment of the present application.
  • UE1 is a synchronous S-SSB transmitting UE
  • the COT of UE1 occupies two RB sets, RB set1 and RB set2, and the configured S-SSB resources are located in RB set2, that is, the transmission of UE1 and the transmission of S-SSB include the same RB set2, and the COT of UE1 includes the RB set2 configured with S-SSB.
  • the COT of UE1 occupies one RB set, RB set1, and the configured S-SSB resources are located in RB set2, that is, the transmission of UE1 and the transmission of S-SSB are not in the same RB set, and the COT of UE1 does not include the RB set2 configured with S-SSB.
  • RB set 2 is referred to as a synchronous RB set, and correspondingly, RB set 1 is referred to as an asynchronous RB set.
  • the bandwidths of RB set 1 and RB set 2 are both 20 MHz, and that RB set 1 and RB set 2 include 4 subchannels respectively, the bandwidth of each subchannel is 5 MHz.
  • UE1 can send COT sharing indication information through SCI and/or MAC CE signaling to indicate the transceiver status of S-SSB1 and/or S-SSB2.
  • UE1 sends indication information to UE2 through SCI and/or MAC CE to indicate that S-SSB1 is a sending resource for S-SSB, and/or to indicate that S-SSB2 is a receiving resource for S-SSB.
  • the specific implementation method of the indication information can be referred to the relevant description of Figure 6 above. For the sake of brevity, it will not be repeated here.
  • UE1 can send S-SSB on S-SSB1, and/or UE1 and UE2 can receive S-SSB on S-SSB2.
  • UE1 can send data or signals associated with S-SSB on the asynchronous RB set1 on the time unit where S-SSB1 is located; and/or, UE1 can use the asynchronous RB set1 on the time unit where S-SSB2 is located to receive data or signals associated with S-SSB.
  • the application refers to the time units where S-SSB1 and S-SSB2 on the synchronous RB set2 are located as synchronous time units, for example, the time unit where S-SSB1 is located is called synchronous time unit #1, and the time unit where S-SSB2 is located is called synchronous time unit #2.
  • the base station indicates through configuration information that the synchronization time unit #1 on the asynchronous RB set1 is used to send a signal associated with the S-SSB, or to send data, or is empty.
  • the base station may also indicate through configuration information that the synchronization time unit #2 on the asynchronous RB set1 is used to receive a signal associated with the S-SSB, or to receive data, or is empty, and this application does not make specific limitations on this.
  • UE1 may send S-SSB in the synchronous RB set 2 on the synchronous time unit #1, receive S-SSB in the synchronous RB set 2 on the synchronous time unit #2, send data in the asynchronous RB set 1 on the synchronous time unit #1, and receive data in the asynchronous RB set 1 on the synchronous time unit #2.
  • UE1 may send COT sharing indication information to UE2 via SCI and/or MAC CE to indicate that RB set 1 and/or RB set 2 on the synchronous time unit #2 are shared receiving resources.
  • UE2 may receive data or a signal associated with S-SSB in RB set 1 and/or RB set 2 on the synchronous time unit #2.
  • UE1 may send data in the non-synchronous RB set 1 on the synchronous time unit #1, and receive data in the non-synchronous RB set 1 on the synchronous time unit #2.
  • UE1 may send COT sharing indication information to UE2 via SCI and/or MAC CE to indicate that the non-synchronous RB set 1 on the synchronous time unit #2 is a shared receiving resource.
  • UE2 may receive data in RB set 1 on the synchronous time unit #2, or a signal associated with the S-SSB.
  • UE1 cannot use the asynchronous RB set 1 on the synchronous time unit #1 as a receiving resource to share COT with UE2.
  • the asynchronous RB set 1 on the synchronous time unit #1 is not configured as a feedback resource.
  • the asynchronous RB set 1 on the synchronous time unit #1 can only be used to send retransmitted data, etc. This application does not limit what the asynchronous RB set 1 on the synchronous time unit #1 is specifically used for, as long as UE1's COT interruption is avoided, and there is no need to ensure that the receiving end performs HARQ feedback, etc.
  • UE1 cannot use the asynchronous RB set 1 on the synchronous time unit #2 as a transmission resource to perform COT sharing with UE2.
  • the asynchronous RB set 1 on the synchronous time unit #2 is not configured as a feedback resource.
  • the asynchronous RB set 1 on the time unit #2 can only be used for UE2 to send retransmitted data, etc.
  • This application does not limit what the asynchronous RB set 1 on the synchronous time unit #2 is used for. It only needs to avoid the COT interruption of UE1, and there is no need to ensure that the receiving end performs HARQ feedback, etc.
  • the transmission resources of S-SSB are used as part of the COT of UE1, and the asynchronous RB set on the synchronous time unit is used as the sending resource or receiving resource, which can avoid the interruption of COT, improve the system transmission performance, reduce the transmission delay, etc.
  • This application does not limit the number of RB sets occupied by the COT of UE1.
  • This application does not limit the number of S-SSB resources contained in the COT.
  • the synchronous RB set contains 2 or 3 S-SSB resources.
  • This application does not specifically limit the transceiver status of S-SSB resources.
  • multiple S-SSB resources are configured as S-SSB transmission resources and S-SSB reception resources, etc.
  • this implementation scheme uses the public S-SSB resources as part of UE1's COT and indicates the receiving and sending status of the S-SSB resources, which can avoid COT interruption, improve system transmission performance, reduce transmission delay, etc.
  • FIG8 shows a schematic diagram of mapping S-SSB-related signals to the asynchronous resource block sets RB sets of UE1 COT.
  • UE1's COT occupies 4 RB sets, including 1 synchronous RB set and 3 asynchronous RB sets.
  • UE1 can use the time unit where the S-SSB on the synchronous RB set is located, that is, the asynchronous RB sets on the synchronous time unit as a resource for transmitting S-SSB-related signals.
  • the time slot where the S-SSB on the synchronous RB set is located can be called a synchronous time slot
  • UE1 can use the synchronous time slot of the asynchronous RB set in the COT as a resource for transmitting S-SSB-related signals (e.g., S-SSS, S-PSS, or PSBCH).
  • S-SSB-related signals e.g., S-SSS, S-PSS, or PSBCH.
  • Figure 8 is only an example. This application does not limit the number of RB sets occupied by UE1, and does not limit the relationship between the frequency domain positions of the synchronous RB sets and the asynchronous RB sets.
  • the synchronous RB set can be located in any one of the multiple RB sets of the COT.
  • the technical solution proposes a method for generating S-SSB related signals in the non-synchronous RB set(s) on the synchronous time unit (e.g., the time slot where the S-SSB on the synchronous RB set is located) of UE1COT, ensuring that the signals of each RB set on the synchronous time unit are different, reducing the peak-to-average power ratio, and improving the system transmission performance.
  • the synchronous time unit e.g., the time slot where the S-SSB on the synchronous RB set is located
  • Fig. 9 is a flow chart of a communication method 900 provided in an embodiment of the present application. As shown in Fig. 9, the method includes the following steps.
  • the first terminal device determines M frequency domain resource sets.
  • the M frequency domain resource sets include a first frequency domain resource set and a second frequency domain resource set
  • the second frequency domain resource set includes the frequency domain resources of the side synchronization signal resources
  • the first frequency domain resource set is the other M-1 frequency domain resource sets except the second frequency domain resource set
  • M is an integer greater than 1.
  • the frequency domain resource set includes any one of the following: the frequency domain resource set is a resource block set on a resource pool; the frequency domain resource set is a resource block set included in the channel occupancy time COT of the first terminal device; M frequency domain resource sets are located in a synchronization resource block set, and the synchronization resource block set includes a second frequency domain resource set and M-1 first frequency domain resource sets; M frequency domain resource sets are M1 frequency domain resource sets located on the resource pool, and each resource block set includes M2 frequency domain resource sets; or, M frequency domain resource sets are M1 frequency domain resource sets located on the channel occupancy time COT of the first terminal device, and each resource block set includes M2 frequency domain resource sets.
  • the first signal can be determined by any one of the following methods: an index of a primary synchronization signal in a resource block set (e.g., RB set); an index of a frequency domain resource set occupied by the primary synchronization signal in the resource block set; an index of a secondary synchronization signal in the resource block set; an index of a frequency domain resource set occupied by the secondary synchronization signal in the resource block set; an index of a PSBCH in the resource block set; an index of a frequency domain resource set occupied by the PSBCH in the resource block set.
  • a resource block set e.g., RB set
  • an index of a frequency domain resource set occupied by the primary synchronization signal in the resource block set e.g., RB set
  • an index of a secondary synchronization signal in the resource block set e.g., an index of a frequency domain resource set occupied by the primary synchronization signal in the resource block set
  • an index of a secondary synchronization signal in the resource block set
  • the number M of frequency domain resource sets may be predefined, configured or preconfigured.
  • the number M of frequency domain resource sets may be predefined by the standard, configured by the network device/other UE, or preconfigured by the first terminal device at the factory, etc.
  • the number of frequency domain resource sets that the network device configures to be available to the first terminal device is 5, and the number of frequency domain resource sets subsequently determined by the first terminal device according to the transmission requirements is less than or equal to 5.
  • the first terminal device is a synchronization source. That is, the first terminal device can be used as a terminal device that sends a side synchronization signal block for exemplary description.
  • the first frequency domain resource set is a first resource block set (eg, RB set1)
  • the second frequency domain resource set is a second resource block set (eg, RB set2).
  • the first frequency domain resource set is an asynchronous RB set1
  • the second frequency domain resource set is a synchronous RB set2.
  • the first frequency domain resource set and the second frequency domain resource set are located in the same resource block set.
  • the first frequency domain resource set is the frequency domain bandwidth of the synchronization RB set except the frequency domain bandwidth for sending S-SSB
  • the second frequency domain resource set is the frequency domain bandwidth for sending S-SSB in the synchronization RB set.
  • the first frequency domain resource set and the second frequency domain resource set are located in the same resource block set.
  • the sideline synchronization signal block includes a first sideline synchronization signal block and a second sideline synchronization signal block, the first sideline synchronization signal block is located outside the resource pool, and the second sideline synchronization signal block is located inside the resource pool or outside the resource pool.
  • the first side synchronization signal block accesses the channel by means of short control signaling
  • the second side synchronization signal block accesses the channel by means of perception.
  • accessing the channel using short control signaling includes: accessing the channel without using a sensing method, or accessing the channel using a type 2A channel access method.
  • type 2A can refer to the definition in 3GPP TS37.213. For example, when the monitoring is idle for 25 ⁇ s, the signal to be sent can be sent immediately.
  • accessing the channel by means of short control signaling satisfies: a duty cycle of sending the first side synchronization signal does not exceed 1/20.
  • the first terminal device sends indication information to the second terminal device;
  • the second terminal device receives the indication information from the first terminal device.
  • the indication information indicates the first frequency domain resource set and/or the second frequency domain resource set.
  • the indication information includes 1 bit, for example, "0" is used to indicate the first frequency domain resource set, and “1" is used to indicate the second frequency domain resource set.
  • a first terminal device obtains a COT, which includes a first frequency domain resource set and a second frequency domain resource set.
  • the first terminal device sends a sideline synchronization signal block and a first signal in a first time unit, where the sideline synchronization signal block is located in the second frequency domain resource set, and the first signal is located in the first frequency domain resource set;
  • the second terminal device receives the first signal from the first terminal device on the first frequency domain resource set on the first time unit.
  • the second terminal device receives a sidelink synchronization signal block from the first terminal device on a second frequency domain resource set on a first time unit.
  • the first signal includes PSBCH, and the first signal is determined by the index of the frequency domain resource set. How to determine the first signal according to the index of the frequency domain resource set will be described in detail below, and will not be described here.
  • the side synchronization signal block includes S-PSS, S-SSS and PBSCH.
  • the present application abbreviates S-PSS, S-SSS and PBSCH as P, S and B respectively.
  • the side synchronization signal block can occupy one slot, for example, the side synchronization signal block includes 13 symbols, which are mapped in sequence from symbol 0 to symbol 12 in the time domain as: B-P-P-S-S-B-B-B-B-B-B-B-B-B-B-B; for another example, the side synchronization signal block includes 11 symbols, which are mapped in sequence from symbol 0 to symbol 10 in the time domain as: B-P-P-S-S-B-B-B-B-B-B-B-B-B; or, the side synchronization signal block can also occupy 4 symbols, for example, in the time domain, symbols 0 to 3 are mapped in sequence as: P-B-S-B.
  • all first signals are PSBCHs.
  • the first terminal device uses rate matching to map all symbols of the M-1 first frequency domain resource sets on the first time unit to PSBCH.
  • the first time unit is the time unit where the S-SSB on the second frequency domain resource set is located.
  • the first terminal device uses rate matching to map all symbols from the second symbol to the second to last symbol on the first time unit to PSBCH on the first frequency domain resource set.
  • the first time unit is the time unit where the S-SSB on the second frequency domain resource set is located.
  • the first symbol on the first time unit of the M-2 first frequency domain resource sets can reuse the PSBCH symbol on the second symbol on each first frequency domain resource set, and the first symbol can be used for AGC by the terminal device.
  • the first time unit here is the time domain resource used to transmit S-SSB on the synchronous RB set, which can also be called a synchronous time unit.
  • the time slot where the S-SSB is located as shown in Figure 8 is the synchronous time slot.
  • the first terminal device performs rate matching of the PSBCH according to all symbols of the first time unit.
  • the unit of time domain resources is a time slot, and a time slot (including 14 symbols) is taken as a synchronous time unit (or called the first time unit) as an example, and the time slot is called a synchronous time slot.
  • symbols 0, 5 to 12 of the synchronous RB set are mapped to PSBCH
  • symbols 1 and 2 are mapped to S-PSS
  • symbols 3 and 4 are mapped to S-SSS
  • symbol 13 is a GAP symbol. All symbols (i.e., symbols 0 to 12) except the last GAP symbol on the asynchronous RB set1 and the asynchronous RB set2 are mapped to PSBCH.
  • the first terminal device may generate a PSBCH according to all resources on 12 symbols.
  • the generated PSBCH is respectively mapped to symbols 1 to 12 on the synchronous time slot of the asynchronous RB set.
  • the PSBCH on symbol 1 may be multiplexed on symbol 0.
  • the PSBCH on the synchronous time slot is rate matched according to 12 symbols.
  • the first terminal device may generate a PSBCH according to all resources on 10 symbols.
  • the generated PSBCH is respectively mapped to symbols 1 to 11 on the synchronous time slot of the asynchronous RB set.
  • the PSBCH on symbol 1 may be multiplexed on symbol 0.
  • the PSBCH on the synchronous time slot is rate matched according to 10 symbols.
  • mapping the first signal in the above manner i.e., all the first signals are PSBCH
  • mapping the first signal in the above manner i.e., all the first signals are PSBCH
  • mapping the first signal in the above manner i.e., all the first signals are PSBCH
  • mapping the first signal in the above manner i.e., all the first signals are PSBCH
  • mapping the first signal in the above manner i.e., all the first signals are PSBCH
  • the first terminal device copies the PSBCH on the synchronization time unit of the second frequency domain resource set to the symbol corresponding to the synchronization time unit of the first frequency domain resource set; the first terminal device copies the PSBCH on some symbols of the synchronization time unit of the second frequency domain resource set to the symbols corresponding to the S-PSS and S-SSS on the synchronization time unit in the first frequency domain resource set.
  • the bits copied are the bits encoded by the PSBCH on the corresponding symbols in the second frequency domain resource set.
  • the bits copied are the bits encoded by the PSBCH on the corresponding symbols in the second frequency domain resource set and before scrambling.
  • the first terminal device copies the PSBCH in the second frequency domain resource set to the same symbol position in the first frequency domain resource set in sequence according to the symbol position of the PSBCH in the second frequency domain resource set. Further optionally, any one or more PSBCHs in the second frequency domain resource set are copied to the symbol positions corresponding to the S-PSS and S-SSS on the first frequency domain resource set.
  • the encoded bits of the symbol position where the PSBCH on the first frequency domain resource set is located are the same as the encoded bits of the symbol position where the PSBCH on the second frequency domain resource set is located.
  • the first terminal device generates a PSBCH according to the symbols occupied by the PSBCH in the second frequency domain resource set, and maps the generated PSBCH to the same symbol positions in the first frequency domain resource set. Further optionally, any one or more PSBCHs that have been generated and mapped in the first frequency domain resource set are copied to the S-PSS symbol and S-SSS symbol positions on the first frequency domain resource set.
  • the encoded bits of the symbol position where the PSBCH on the first frequency domain resource set is located are the same as the encoded bits of the symbol position where the PSBCH on the second frequency domain resource set is located.
  • the unit of time domain resources is a time slot, and a time slot (including 14 symbols) is taken as a synchronization time unit as an example, and the time slot is called a synchronization time slot.
  • symbols 0, 5 to 12 of the synchronization RB set are mapped to PSBCH
  • symbols 1 and 2 are mapped to S-PSS
  • symbols 3 and 4 are mapped to S-SSS
  • symbol 13 is a GAP symbol.
  • Symbols 0, 5 to 12 of the non-synchronization RB set are mapped to PSBCH, and the PSBCH on symbol 0 is copied from the PSBCH on symbol 0 of the synchronization RB set, and the coded bits of symbol 0 where the PSBCH on the non-synchronization RB set is located are the same as those of symbol 0 where the PSBCH on the synchronization RB set is located.
  • the PSBCHs on symbols 5 to 12 are copied from the PSBCHs on symbols 5 to 12 of the synchronous RB set, and the PSBCHs on symbols 5 to 12 on the asynchronous RB set are the same as the encoded bits of the PSBCHs on symbols 5 to 12 on the synchronous RB set.
  • copying any one or more PSBCHs in the synchronous RB set to the S-PSS symbol and S-SSS symbol position on the asynchronous RB set can be understood as:
  • the symbol position on the synchronous RB set any one of symbol 0, symbol 5 to symbol 12 (for example, PSBCH on symbol 7) is repeated 4 times and mapped to symbols 1 to 4 where the S-PSS and S-SSS of the asynchronous RB set are located.
  • the PSBCH on any two symbols (e.g., symbol 5 and symbol 10) in the symbol position on the synchronous RB set is repeated twice and mapped to symbols 1 to 4 where the S-PSS and S-SSS of the asynchronous RB set are located.
  • symbols 1 and 2 are mapped to the PSBCH on symbol 5 of the synchronous RB set
  • symbols 3 and 4 are mapped to the PSBCH on symbol 8 of the synchronous RB set.
  • the PSBCH at symbol positions on the synchronous RB set symbol 0, any four symbols from symbol 5 to symbol 12 (e.g., symbol 9, symbol 10, symbol 11, and symbol 12) are respectively mapped to symbols 1 to 4 where the S-PSS and S-SSS of the non-synchronous RB set are located.
  • symbol 1 is mapped to the PSBCH at symbol 9 of the synchronous RB set
  • symbol 2 is mapped to the PSBCH at symbol 10 of the synchronous RB set
  • symbol 3 is mapped to the PSBCH at symbol 11 of the synchronous RB set
  • symbol 4 is mapped to the PSBCH at symbol 12 of the synchronous RB set.
  • mapping the first signal (i.e., PSBCH) in the above manner on the asynchronous RB set on the synchronous time unit can ensure that the signals on each RB set from symbol 1 to symbol 4 are different, thereby reducing PAPR. Furthermore, because the PSBCH on the first frequency domain resource The same numbered bits as those of the PSBCH on the second frequency domain resources are used, so only one cache is needed to store the PSBCH encoded bits to map them to different frequency domain resource sets. This implementation method further reduces the storage size of the first terminal device and saves costs.
  • the first signal further includes S-PSS and/or S-SSS, and the symbol position of the S-PSS in the first frequency domain resource set is different from the symbol position of the S-PSS in the second frequency domain resource set.
  • the first terminal device determines the symbol position of the S-PSS and/or S-SSS on the first frequency domain resource set in the first time unit according to the index of the first frequency domain resource set, and the first time unit is the time unit where the S-SSB on the second frequency domain resource set is located. That is to say, in the first frequency domain resource set configured on the resource pool, the time domain mapping method of the S-PSS, S-SSS and PSBCH is determined by the method of indexing the first frequency domain resource set, thereby ensuring that on symbols 0 to 12 on the first time unit, the signal on the synchronous RB set is different from the signal on at least one asynchronous RB set.
  • the unit of time domain resources is a time slot, and a time slot (including 14 symbols) is taken as a synchronization time unit as an example, and the time slot is called a synchronization time slot.
  • symbols 0, 5 to 12 of the synchronous RB set are mapped to PSBCH
  • symbols 1 and 2 are mapped to S-PSS
  • symbols 3 and 4 are mapped to S-SSS
  • symbol 13 is a GAP symbol.
  • the indexes of asynchronous RB set 1 to asynchronous RB set 5 are 1 to 5, respectively, indicating that relative to the synchronous RB set, symbols 1 to 12 on the asynchronous RB set 1 to the asynchronous RB set 5 need to be shifted right by 10, 8, 6, 4, and 2 symbol positions, respectively.
  • the symbol position where the S-PSS on the asynchronous RB set 1 is located is shifted right to symbols 11 and 12
  • the symbol position where the S-PSS on the asynchronous RB set 2 is located is shifted right to symbols 9 and 10
  • the symbol position where the S-PSS on the asynchronous RB set 3 is located is shifted right to symbols 7 and 8
  • the symbol position where the S-PSS on the asynchronous RB set 4 is located is shifted right to symbols 5 and 6
  • the symbol position where the S-PSS on the asynchronous RB set 5 is located is shifted right to symbols 3 and 4.
  • Figure 12 is only an example given to facilitate understanding of the solution.
  • the index of the first frequency domain resource set, the S-PSS on the first frequency domain resource set, and/or the symbol position of the S-SSS in the first time unit may be predefined, configured or preconfigured, and this application does not make specific limitations.
  • the transformation of the symbol positions of the S-SSS and S-PSS can be bound or separated; and the determination method of the symbol positions of the S-SSS and S-PSS can be the same or different, and this application does not make specific limitations.
  • mapping the first signal (i.e., PSBCH, S-SSS, and S-PSS) in the above manner on the asynchronous RB set on the synchronous time unit can ensure that the signals on each symbol on each RB set are different, thereby reducing the PAPR.
  • the first terminal device determines M S-SSS sequences, and the M S-SSS sequences correspond one-to-one to the indexes of M frequency domain resource sets.
  • each frequency domain resource set corresponds to an S-SSS sequence among the M S-SSS sequences, and each S-SSS sequence in the M S-SSS sequences is different.
  • the first signal includes at least one S-PSS.
  • the first terminal device scrambles the M-1 S-PSSs in the first frequency domain resource set on the first time unit according to the M S-SSS sequences, so that the S-PSS sequences on each RB set are also different, thereby reducing the PAPR. It should be understood that the present application does not specifically limit the scrambling method of the M-1 S-PSSs in the first frequency domain resource set on the first time unit.
  • the first terminal device scrambles the S-PSS in each frequency domain resource set of M frequency domain resource sets on the first time unit according to the M S-SSS sequences. It should be understood that the present application does not specifically limit the scrambling method of the M-1 S-PSSs in the first frequency domain resource set on the first time unit.
  • the scrambling of the S-PSS here can be understood as: for the S-PSS on the j frequency domain resource sets, the S-PSS on the second frequency domain resource set and the S-SSS sequence on the first frequency domain resource set can be modulo-2 added according to the corresponding bits.
  • the S-PSS on the second frequency domain resource set and the S-SSS sequence on the first frequency domain resource set can be modulo-2 added according to the corresponding bits.
  • Sc(j,i) represents the i-th bit of the S-PSS sequence on the j-th first frequency domain resource set
  • a(i,0) represents the i-th bit of the S-PSS sequence on the second frequency domain resource set
  • b(j,i) represents the i-th bit of the S-SSS sequence on the j-th first frequency domain resource set
  • j is the S-SSB index or the index of the frequency domain resource
  • N is a positive integer.
  • the symbol positions of S-PSS, S-SSS, and PSBCH on the M frequency domain resource sets in this implementation can be the same.
  • symbols 0, 5 to 12 on each frequency domain resource set are mapped to PSBCH
  • symbols 1 and 2 are mapped to S-PSS
  • symbols 3 and 4 are mapped to S-SSS
  • symbol 13 is a GAP symbol.
  • the S-PSS and S-SSS on the RF signal are modified accordingly to avoid the problem of high PAPR.
  • scrambling the S-PSS can also be understood as: for the S-PSS on j frequency domain resource sets, the S-PSS on the second frequency domain resource set and the random sequence c(i,j) can be added modulo 2 according to the corresponding bits; for the S-SSS on i frequency domain resource sets, the S-SSS sequence on the first frequency domain resource set and the random sequence c(i,j) can be added modulo 2 according to the corresponding bits.
  • S-PSS(i,j) (S-PSS(0,j)+c(i,j))mod 2,0 ⁇ j ⁇ L-1,0 ⁇ i ⁇ Nt-1; and/or,
  • S-SSS(i,j) (S-SSS(0,j)+c(i,j))mod 2,0 ⁇ j ⁇ L-1,0 ⁇ i ⁇ Nt-1;
  • L is the length of the S-PSS sequence
  • S-PSS(0,j) is the master synchronization signal sequence in the side synchronization signal block
  • S-SSS(0,j) is the slave synchronization signal sequence in the side synchronization signal block
  • c(i,j) represents the jth symbol in the i-th random sequence
  • the initial value of c(i,j) is determined by the identifier of the side synchronization signal sequence and/or the index of the frequency domain resource set
  • mod represents a modulo operation.
  • Nt is the number of M frequency domain resource sets determined by the first terminal device.
  • S-PSS(0,j) is the main synchronization signal sequence in the side synchronization signal block used for synchronizing the S-SSB signal.
  • the initial value C init of c(i,j) satisfies:
  • i is the S-SSB index or the index of the frequency domain resource
  • m and n are integers.
  • S-PSS(i,j) S-PSS(0,j)*(1-2*c(i,j)), 0 ⁇ j ⁇ L-1; and/or,
  • S-SSS(i,j) S-SSS(0,j)*(1-2*c(i,j)), 0 ⁇ j ⁇ L-1;
  • L is the length of the S-PSS sequence
  • L is also the length of the S-SSS sequence
  • S-PSS(0,j) is the master synchronization signal sequence in the side synchronization signal block
  • S-SSS(0,j) is the slave synchronization signal sequence in the side synchronization signal block
  • c(i,j) represents the jth code element in the i-th random sequence
  • the initial value of c(i,j) is determined by the identifier of the side synchronization signal sequence and/or the index i of the frequency domain resource set
  • i is an integer.
  • 1 ⁇ i ⁇ M-1 the set of M frequency domain resources determined by the first terminal device.
  • S-PSS(i,j) represents i repeated scrambled S-PSS sequences
  • S-PSS(0,j) represents the S-PSS sequence at the frequency position of the S-SSB (which can be referred to as S-SSB ARFCN or synchronization frequency point) used for synchronization
  • S-SSS(i,j) represents i repeated scrambled S-SSS sequences
  • S-SSS(0,j) represents the S-SSS sequence at the frequency position of the S-SSB (which can be referred to as S-SSB ARFCN or synchronization frequency point) used for synchronization
  • i is the S-SSB repetition number index. That is to say, in this implementation, the S-SSBs of non-synchronous frequency points other than the S-SSB used for synchronization are scrambled.
  • x 0 (i+7) (x 0 (i+4) + x 0 (i)) mod 2;
  • x 1 (i+7) (x 1 (i+1) + x 1 (i)) mod 2;
  • the initial value of the corresponding scrambling sequence can be generated as follows:
  • the initial value of the random sequence used to scramble the S-PSS, S-SSS and/or PSBCH in the i-th frequency domain resource set is determined according to any of the following expressions:
  • c init (i) is the initial value of the random sequence
  • the value of i is any integer from 0 to M-1, or from 1 to M, or from 1 to M-1
  • k is an integer greater than or equal to 1
  • q is an integer greater than or equal to 1
  • (q+k) ⁇ 31 represents the identifier of the side synchronization signal sequence
  • floor(x) represents rounding down x.
  • the value of k can be 10, 20, 30, etc.
  • the value of q can be
  • (q+k) ⁇ 31 for example, the value of (q+k) is any integer between 20 and 31, for example, 20, 21, 25, 30 or 31.
  • M is the M frequency domain resource sets determined by the first terminal device.
  • M is the M frequency domain resource sets determined by the first terminal device.
  • q 20 or 21
  • the 31-bit shift register can be shifted as much as possible.
  • the remaining 20 or 21 bits of the 31 bits other than the occupied 10 bits are randomized as much as possible to increase the difference of the sequence, thereby further reducing the PAPR.
  • the initial value of the random sequence is generated using parameters related to the index of the frequency domain resource set, thereby generating M-1 different random sequences in a simple and easy-to-implement manner. Then, the S-PSS and/or S-SSS on the non-synchronous frequency point are scrambled using the M-1 random sequences, and M-1 different S-PSS sequences and M-1 different S-SSS sequences can be obtained. Together with the S-PSS sequence on the original synchronous frequency point and the S-SSS sequence on the original synchronous frequency point, M different S-PSS sequences and M different S-SSS sequences can be obtained respectively. Because these M sequences are different, the PAPR of the time domain signal generated by the signal number of the M frequency domain resource set can be reduced to the greatest extent, thereby increasing the maximum available power during actual transmission and improving the transmission performance.
  • the first terminal device determines M S-SSS sequences, including:
  • the first terminal device determines M S-SSS sequences, an integer of 1 ⁇ i ⁇ M, based on the SLSSID in the i-th frequency domain resource set.
  • SLSSID_i in the i-th frequency domain resource set satisfies:
  • SLSSID_i (RBSi-1)*Ms/M+SLSSID_n;or,
  • SLSSID_i (RBSi)*Ms/M+SLSSID_n;
  • RBSi is the index of the i-th frequency domain resource set, i is an integer greater than or equal to 1 and less than or equal to M, the value of SLSSID_n is any integer in [0,1,...,Ms/M], and Ms is a positive integer not less than M.
  • the value range of SLSSID_i should be smaller than Ms-M, or smaller than Ms-M+1.
  • Ms is a positive integer, or in other words, Ms is a positive integer value that is an integer multiple of M.
  • Ms takes a value of any one of 335, 336, 670, 671, or 672.
  • the first terminal device determines the SLSSID_i of the S-SSB to be sent in the second frequency domain resource set, and then determines the S-PSS and S-SSS used on the corresponding second frequency domain resource set according to the above formula (1) or formula (1a).
  • the above formula (1) is applied to a communication device in a network.
  • the above formula (1a) is applied to a communication device outside a network.
  • SLSSID_i may also take one or more of the values 0, Ms/M, 2Ms/M, ... (M-1)Ms/M to indicate that the first terminal device is directly synchronized to the satellite.
  • SLSSID_i may also take one or more of the values 0, Ms/M/2, 2Ms/M/2, ... (M-1)Ms/M/2 to indicate that the first terminal device is indirectly synchronized to the satellite.
  • the first terminal device determines the SLSSID in the first frequency domain resource set based on the index RBSi of the i-th frequency domain resource set and the SLSSID of the sidelink synchronization signal block in the second frequency domain resource set.
  • SLSSID0 is the SLSSID of the S-SSB determined by the first terminal device in the second frequency domain resource set
  • RBS i represents the i-th frequency domain resource set index
  • the S-SSS sequences corresponding to at least two asynchronous RB sets are different.
  • the S-PSS on the M-1 asynchronous RB sets is scrambled, so that the S-PSS sequences on each RB set are also different, thereby reducing the PAPR.
  • the M S-SSS sequences can be used to scramble the S-PSS on the M RB sets, which is not limited in this application.
  • the following specifically describes how the first signal sent on the first frequency domain resource set on the first time unit is determined according to the index of the frequency domain resource set.
  • the first terminal device generates a first sequence, an integer of 1 ⁇ i ⁇ M, according to the index of the i-th frequency domain resource set; the first terminal device scrambles the PSBCH on the i-th frequency domain resource set on the first time unit according to the first sequence.
  • this implementation method needs to generate a first sequence for each of the M frequency domain resource sets, and scramble the PSBCH on the synchronous RB set and the asynchronous RB set according to the first sequence.
  • the scrambling for PSBCH may be determined according to the following method:
  • b(0,n) represents the frequency position of the S-SSB (S-SSB ARFCN) used for synchronization before modulation, and the bit transmitted on the physical side link broadcast channel
  • M bit represents the number of bits before PSBCH scrambling
  • c(i,n) represents the symbol n of the i-th scrambled sequence
  • mod represents the modulo operation.
  • the value of c(i,n) is 0 or 1.
  • the first terminal device generates a first sequence according to an index of the first frequency domain resource set; the first terminal device scrambles the PSBCH on the first frequency domain resource set on the first time unit according to the first sequence.
  • a first sequence is generated according to the indexes of the M-1 first frequency domain resource sets, and the PSBCH on the M-1 non-synchronous RB sets is scrambled according to the first sequence.
  • M bit represents the number of bits sent on PSBCH
  • ac(j,i) represents the i-th bit after scrambling on the j-th first frequency domain resource set
  • a(j,i) represents the i-th bit before scrambling on the j-th first frequency domain resource set
  • c(j,i) represents the i-th bit of the scrambling sequence on the j-th first frequency domain resource set.
  • the scrambling sequence is a random sequence or a pseudo-random sequence.
  • it is a Gold sequence with a length of 31.
  • Nc 1600
  • the initial values of the second m-sequence x2 (n) are
  • the initial value c init of the scrambling sequence may be generated according to the index of the frequency domain resource set (eg, the i-th frequency domain resource set, or the first frequency domain resource set).
  • n is an integer.
  • m ceil(log 2 (RBS i )), where ceil(x) represents rounding x upwards.
  • n is an integer.
  • ceil(x) means rounding x upwards.
  • the above-mentioned random sequence can be a random sequence used to scramble S-PSS and S-SSS, or a random sequence used to scramble PSBCH, or a random sequence for generating DMRS of PSBCH.
  • the above-mentioned random sequence can also be the first sequence and the second sequence in the present application.
  • the PSBCH includes a reference signal for PSBCH demodulation, the reference signal for PSBCH demodulation is generated by a second random sequence, and an initial value of the second random sequence is determined by an identifier of a sidelink synchronization signal sequence and/or an index of a first frequency domain resource set.
  • the initial value of the demodulation reference signal (DMRS) sequence of PSBCH is:
  • c init (i) is the initial value of the random sequence, i is any integer from 0 to M-1, or from 1 to M, or from 1 to M-1, k is an integer greater than or equal to 1, q is an integer greater than or equal to 1, Indicates the identifier of the side synchronization signal sequence, floor(x) indicates rounding down x.
  • the value of k can be 10, 20, 30, etc.
  • the value of q can be 10, 20, 30, etc.
  • (q+k) ⁇ 31 for example, the value of (q+k) is any integer between 20 and 31, such as 20, 25, 30 or 31, etc.
  • M is the M frequency domain resource sets determined by the first terminal device.
  • q 20 or 21, and the 31-bit shift register can be shifted as much as possible.
  • the remaining 20 or 21 bits of the 31 bits other than the occupied 10 bits are randomized as much as possible to increase the difference in sequence, thereby further reducing Low PAPR.
  • different initial values of the scrambling sequence can be generated for different frequency domain resource sets, thereby generating different scrambling sequences, and using different scrambling sequences to scramble the PSBCH to be transmitted, thereby achieving different purposes of the PSBCH generated on different frequency domain resource sets, avoiding the problem of high PAPR during transmission on the synchronous time domain unit, and improving system performance.
  • the index RBS i of the i-th frequency domain resource set may be determined according to any one of the following:
  • the parameter value configured for the frequency domain resource set, where the configuration can be predefined, configured or preconfigured.
  • the determination may be made according to any one of the following:
  • the index of the first frequency domain resource set is determined according to the starting subcarrier (subchannel or physical resource block PRB) position of the first frequency domain resource;
  • the index of the first frequency domain resource set is determined according to the position of the central subcarrier (subchannel or physical resource block PRB) of the first frequency domain resource;
  • the index of the first frequency domain resource set is determined according to the position of the ending subcarrier (subchannel or physical resource block PRB) of the first frequency domain resource;
  • the index of the first frequency domain resource set is determined according to the index of the first frequency domain resource set in the resource block set
  • the index of the second frequency domain resource set is determined according to the starting subcarrier (subchannel or physical resource block PRB) position of the second frequency domain resource;
  • the index of the second frequency domain resource set is determined according to the position of the central subcarrier (subchannel or physical resource block PRB) of the second frequency domain resource;
  • the index of the second frequency domain resource set is determined according to the position of the ending subcarrier (subchannel or physical resource block PRB) of the second frequency domain resource;
  • a first parameter value configured for the first frequency domain resource set determining an index of the first frequency domain resource set, where the configuration may be predefined, configured or preconfigured;
  • the first parameter value configured for the second frequency domain resource set determines the index of the second frequency domain resource set, where the configuration may be predefined, configured or preconfigured.
  • the signal sent by the first terminal device needs to occupy at least 16MHz of spectrum bandwidth. Assuming that the S-SSB occupies only 11 PRBs, the channel occupancy requirement of the OCB cannot be met. Therefore, the S-SSB can be sent repeatedly to occupy the entire bandwidth of the RB set as much as possible. However, this implementation method will still produce a strong PAPR, resulting in limited transmission power and reduced transmission performance.
  • a solution is provided to reduce the peak-to-average ratio of the time unit where the S-SSB on the RB set is located, that is, the generation method of the first signal on other frequency domain resources in the RB set except the 11 PRBs occupied by the S-SSB.
  • the unit of time domain resources is a time slot, and a time slot (including 14 symbols) is taken as a synchronization time unit as an example, and the time slot is called a synchronization time slot.
  • the position of the time domain resources occupied by the PSBCH in the S-SSB on the RB set is: symbol 0, symbols 5 to 12.
  • the starting and ending positions of the frequency domain resources occupied by the PSBCH are marked as: subcarrier 0 to subcarrier 131.
  • the starting position of the time domain resources occupied by the S-PSS and/or S-SSS in the S-SSB is: symbol 1 to symbol 4, and the starting and ending positions of the frequency domain resources occupied by the S-PSS and/or S-SSS are: subcarrier 2 to subcarrier 128.
  • the PSBCH also occupies the S-PSS, S-SSS in the frequency domain resource set, and the frequency domain resources other than subcarrier 0 to subcarrier 131 on the time unit where the PSBCH is located.
  • the PSBCH is mapped outside the time-frequency resources configured with the S-SSB.
  • it can be mapped outside subcarrier 0 to subcarrier 131.
  • the frequency domain resources below subcarrier 0 and above subcarrier 131 shown in (a) of Figure 13 and the subcarriers corresponding to 0, 1, 129, 130, and 131 on the S-PSS and S-SSS bandwidth edges are not mapped to the PSBCH.
  • the unit of time domain resources is a time slot, and a time slot (including 14 symbols) is taken as a synchronization time unit as an example, and the time slot is called a synchronization time slot.
  • the positions of the time domain resources occupied by the PSBCH in the S-SSB on the RB set are: symbol 0, symbols 5 to 12.
  • the starting and ending positions of the frequency domain resources occupied by the PSBCH are marked as: subcarrier 0 to subcarrier 131.
  • the PSBCH also occupies the S-PSS, S-SSS in the frequency domain resource set, and the frequency domain resources other than subcarrier 0 to subcarrier 131 on the time unit where the PSBCH is located.
  • the starting position of the time domain resources occupied by the S-PSS and/or S-SSS in the S-SSB is: symbol 1 to symbol 4, and the starting and ending positions of the frequency domain resources occupied by the S-PSS and/or S-SSS are marked as: subcarrier 2 to subcarrier 128.
  • the PSBCH is mapped outside the time-frequency resources configured with the S-SSB.
  • it can be mapped outside the subcarrier 0 to the subcarrier 131.
  • PSBCH is mapped on the carrier.
  • the unit of time domain resources is a time slot, and a time slot (including 14 symbols) is taken as a synchronization time unit as an example, and the time slot is called a synchronization time slot.
  • the positions of the time domain resources occupied by the PSBCH in the S-SSB on the RB set are: symbol 0, symbols 5 to 12.
  • the starting and ending positions of the frequency domain resources occupied by the PSBCH are marked as: subcarrier 0 to subcarrier 131.
  • the PSBCH also occupies the S-PSS, S-SSS in the frequency domain resource set, and the frequency domain resources other than subcarrier 0 to subcarrier 131 on the time unit where the PSBCH is located.
  • the starting position of the time domain resources occupied by the S-PSS and/or S-SSS in the S-SSB is: symbol 1 to symbol 4, and the starting and ending positions of the frequency domain resources occupied by the S-PSS and/or S-SSS are marked as: subcarrier 2 to subcarrier 128.
  • the first signal is generated by generating M S-SSS sequences as described above, and scrambling M-1 S-PSSs according to the M S-SSS sequences, that is, mapping the PSBCH outside the time-frequency resources configured with the S-SSB.
  • it can be mapped outside subcarriers 0 to 131, and the PSBCH is not mapped on the subcarriers corresponding to 0, 1, 129, 130, and 131 on the bandwidth edge of each S-PSS and S-SSS.
  • the PSBCH is mapped outside the time-frequency resources configured with the S-SSB, and the PSBCH is mapped on subcarriers 129, 130, 131, and 0 and 1 on the bandwidth edges of the S-PSS and S-SSS.
  • the unit of time domain resources is time slot, and take a time slot (including 14 symbols) as a synchronization time unit as an example, the time slot is called a synchronization time slot.
  • the position of the time domain resources occupied by the PSBCH in the S-SSB on the RB set is: symbol 0, symbols 5 to 12, and the start and end positions of the frequency domain resources occupied by the PSBCH are marked as: subcarrier 0 to subcarrier 131.
  • the PSBCH also occupies the S-PSS, S-SSS in the frequency domain resource set, and the frequency domain resources other than subcarrier 0 to subcarrier 131 on the time unit where the PSBCH is located.
  • the starting position of the time domain resources occupied by the S-PSS and/or S-SSS in the S-SSB is: symbol 1 to symbol 4, and the start and end positions of the frequency domain resources occupied by the S-PSS and/or S-SSS are marked as: subcarrier 2 to subcarrier 128.
  • the first signal is generated by generating M S-SSS sequences as described above, and scrambling M-1 S-PSSs according to the M S-SSS sequences, that is, mapping the PSBCH outside the time-frequency resources configured with the S-SSB.
  • the PSBCH can be mapped outside subcarriers 0 to 131, and on subcarriers corresponding to 0, 1, 129, 130, and 131 on the edge of the S-PSS and S-SSS bandwidth.
  • mapping S-SSB-related signals or channels on an RB set except for the synchronization signal that needs to fully map the S-SSB, other signals used to meet the OCB requirements only need to fill the bandwidth of the RB set, and there is no need to fill all the complete S-SSB signals.
  • the S-SSB signal can be further filled. Accordingly, when filling as above, the PSBCH needs to perform rate matching on the corresponding symbols and mapped PRBs or REs.
  • NCP normal CP
  • ECP extended CP
  • the bandwidth occupied by the S-SSB is predefined, such as 11PRB, or 20PRB, or other values, and the present application does not limit this.
  • the scrambled PSBCH is used to distinguish it from the S-SSB on the synchronous RB set, and there is no S-PSS and S-SSS on the asynchronous RB set; different time domain mapping methods are used to distinguish the S-SSB on the asynchronous RB set and the synchronous RB set; different S-PSS and S-SSS sequences are generated to distinguish the S-SSB on the asynchronous RB set and the synchronous RB set.
  • the above implementation methods can reduce the peak-to-average ratio of the signal in the time unit where the S-SSB is located, thereby improving the system transmission performance.
  • the S-SSB copy can be a master synchronization signal of a synchronized S-SSB or a set of frequency domain resources occupied by the master synchronization signal, or a slave synchronization signal of a synchronized S-SSB or a set of frequency domain resources occupied by the slave synchronization signal, or a PSBCH of a synchronized S-SSB or a set of frequency domain resources occupied by the PSBCH.
  • S-SSB copy 1, S-SSB copy 2, ..., S-SSB copy N can be the same or different, and this application does not limit this.
  • UE1 can transmit S-SSB related signal (such as S-PSS, S-SSS, or PSBCH) resources on the synchronous time slot of the asynchronous RB set within the COT.
  • S-SSB related signal such as S-PSS, S-SSS, or PSBCH
  • UE1 can completely copy or map one S-SSB used for synchronization and N S-SSB copies used for occupying the channel on the synchronous RB set to the synchronous time slots of the other three asynchronous RB sets.
  • UE1 can scramble the S-SSB signal used for synchronization and the S-SSB copy signal used for occupying the channel on the four RB sets within the COT.
  • the specific scrambling method can be described in detail below and will not be explained here.
  • PAPR peak average value ratio
  • UE1 can also scramble multiple asynchronous RB sets.
  • the frequency domain resource set may include any of the following:
  • the frequency domain resource set is a resource block set in the resource pool
  • the frequency domain resource set is a set of resource blocks included in the channel occupation time COT of the first terminal device
  • the M frequency domain resource sets are located in one synchronization resource block set, and the synchronization resource block set includes the second frequency domain resource set and M-1 first frequency domain resource sets;
  • the M frequency domain resource sets are located in the M1 frequency domain resource sets on the resource pool, and each resource block set includes M2 frequency domain resource sets; or, the M frequency domain resource sets are located in the M1 frequency domain resource sets on the channel occupancy time COT of the first terminal device, and each resource block set includes M2 frequency domain resource sets.
  • the index of the frequency domain resource set may be any one of the following:
  • the index of the frequency domain resource set includes any one of the following (1), (2), (3):
  • the index of the primary synchronization signal in a resource block set (e.g., RB set) or the index of the frequency domain resource set occupied by the primary synchronization signal.
  • a resource block set e.g., RB set
  • the index of the RB set is the index corresponding to each S-PSS.
  • the index may include the original P-SSS and the index of other copies of the P-SSS used to occupy the channel; or, it may only include the index of each copy.
  • the copy of the P-SSS is a signal generated after the transmitted signal includes the original P-SSS signal and/or performs other processing (such as scrambling, cyclic shift, etc.).
  • An index of a slave synchronization signal in a resource block set, or an index of a frequency domain resource set occupied by a slave synchronization signal For example, if a plurality of S-SSSs are included in an RB set, the index of the RB set is the index corresponding to each S-SSS.
  • the index may include the original S-SSS and the index of a copy of the other S-SSS used to occupy the channel.
  • the copy of the S-SSS is a signal generated after the transmitted signal includes the original S-SSS signal and/or performs other processing (such as scrambling, cyclic shift, etc.).
  • the index of the PSBCH in the resource block set, or the index of the frequency domain resource set occupied by the PSBCH is the index corresponding to each PSBCH.
  • the index fn of the frequency domain resource set is: the index i of the resource block, and the joint index determined by the index j of the S-SSB signal in the resource block. Among them, and the index of the S-SSB signal in the resource block.
  • the index fn of the frequency domain resource set satisfies the following conditions:
  • M represents the number of resource block sets RB set included in the frequency domain resource set
  • N represents the number of all S-SSB signals in a resource block set RB set. It should be understood that the number of all S-SSB signals in a resource block set RB set includes S-SSB signals used for synchronization and S-SSB replica signals used for occupying channels.
  • the index fn of the frequency domain resource set satisfies the following conditions:
  • UE1 may first use sequence c1 to scramble the S-SSB signals in four RB sets, and then use sequence c2 to scramble the nine S-SSB copies in each RB set to reduce the peak-to-average ratio of the 36 signals on the synchronization time slot.
  • sequence c1 to scramble the S-SSB signals in four RB sets
  • sequence c2 to scramble the nine S-SSB copies in each RB set to reduce the peak-to-average ratio of the 36 signals on the synchronization time slot.
  • the specific implementation method of scrambling by sequence can refer to the relevant description above, and will not be repeated here for the sake of brevity.
  • UE1 may first use sequence c2 to scramble the nine S-SSB copies in each RB set, and then use Sequence c1 scrambles the S-SSB signals in the four RB sets respectively to reduce the peak-to-average ratio of the 36 signals on the synchronization time slot.
  • sequence c2 to scramble the nine S-SSB copies in each RB set
  • Sequence c1 scrambles the S-SSB signals in the four RB sets respectively to reduce the peak-to-average ratio of the 36 signals on the synchronization time slot.
  • the specific implementation method of scrambling by sequence can refer to the relevant description above, and will not be repeated here for the sake of brevity.
  • the S-PSS, S-SSS and/or PSBCH in the S-SSB are scrambled using two sequences respectively, satisfying the following conditions:
  • ac(i,j) is the scrambled signal
  • L is the length of the signal a to be scrambled
  • a(0,j) is the S-PSS, S-SSS or PSBCH in the side synchronization signal block
  • c1(i,j) and c2(i,j) are random sequences
  • the initial values of c1(i,j) and c2(i,j) are determined by the identifier of the side synchronization signal sequence and/or the index of the frequency domain resource set
  • mod represents the modulo operation
  • N is a positive integer
  • i is the index of the resource block set RB set
  • j is the index of each S-SSB signal in the resource block set.
  • the initial value C init of c1(i,j) and/or c2(i,j) satisfies:
  • i is the S-SSB index or the index of the frequency domain resource
  • m, n, q, and p are integers.
  • Fig. 14 is a flow chart of a communication method 1300 provided in an embodiment of the present application. As shown in Fig. 13, the method includes the following steps.
  • the first terminal device determines a side synchronization signal block and first data.
  • the side synchronization signal block and the first data are located on different frequency domain resources on the first time unit.
  • the side synchronization signal block and the first data are located on different frequency domain resources on the first time unit, which may include: the side synchronization signal block and the first data are located on the same or different RB sets.
  • the first terminal device is a synchronization source. That is, the first terminal device can be used as a terminal device that sends a side synchronization signal block for exemplary description.
  • the first terminal device determines to send or receive the sideline synchronization signal block and/or the first data in the first time unit according to the priority of the sideline synchronization signal block and/or the first data.
  • the side synchronization signal block can be an S-SSB configured in the resource pool or a candidate S-SSB.
  • the configured S-SSB resources will be excluded from the resource pool, while the candidate S-SSB resources will not be excluded from the resource pool.
  • the configured S-SSB can be called the first synchronization signal block, corresponding to the first resource
  • the candidate S-SSB can be called the second synchronization signal block, corresponding to the second resource.
  • the first terminal device sends or receives a side synchronization signal block and/or first data in a first time unit.
  • the S-SSB is frequency-division multiplexed with the data. That is, the side synchronization signal block and the first data are to be sent by the first terminal device in the first time unit.
  • this scenario can be considered as frequency division multiplexing within the same transmitting device.
  • the S-SSB is sent on the synchronous RB set, and the data is sent on the asynchronous RB set, and the two are frequency-division multiplexed. That is, the side synchronization signal block is to be sent by the first terminal device in the first time unit, and the first data is to be received by the first terminal device in the first time unit; or, the side synchronization signal block is to be received by the first terminal device in the first time unit, and the first data is to be sent by the first terminal device in the first time unit.
  • this scenario can be considered as frequency division multiplexing within different sending devices, or frequency division multiplexing within the system.
  • the first terminal device determines whether only one channel can be sent or both channels can be sent, and the following possible implementation methods are given.
  • the first terminal device determines to send or receive a side synchronization signal block on the first time unit.
  • the first terminal device determines to send or receive the side synchronization signal block and/or the first data on the first time unit according to the usage of the first resource.
  • the first terminal device when the first terminal device successfully sends the first sideline synchronization signal block on the first resource, the first terminal device determines to send the first data on the first time unit.
  • the first terminal device when the first terminal device fails to successfully send the first side synchronization signal block on the first resource, the first terminal device determines to send the side synchronization signal block and/or the first data on the first time unit according to the priority of the side synchronization signal block and/or the first data.
  • the first terminal device determines to send a side synchronization signal block on the first time unit: the priority of the side synchronization signal block is higher than the priority of the first data; the priority of the side synchronization signal block is higher than the configured first priority threshold; the priority of the side synchronization signal block is higher than the priority of the first data, and the priority of the side synchronization signal block is higher than the configured first priority threshold.
  • the first terminal device determines to send the first data on the first time unit: the priority of the first data is higher than the priority of the side synchronization signal block; the priority of the first data is higher than the configured first priority threshold; the priority of the first data is higher than the priority of the side synchronization signal block, and the priority of the first data is higher than the configured first priority threshold.
  • UE-1 is determined based on the priority of S-SSB and the priority of the TB to be sent.
  • the TB can be sent;
  • S-SSB is always sent.
  • the TB is also sent.
  • the first terminal device when the first terminal device fails to successfully send the first sideline synchronization signal block on the first resource, the first terminal device determines to send the sideline synchronization signal block and/or the first data on the first time unit according to the indication information.
  • the first terminal device obtains first information, and the first information is used to indicate the sending side line synchronization signal block; the first terminal device obtains second information, and the second information is used to indicate the sending side line synchronization signal block and the first data.
  • the first terminal device determines to send the first data in the first time unit: the first terminal device obtains third information, and the third information is used to indicate the sending of the first data; the first terminal device obtains fourth information, and the fourth information is used to indicate the sending side synchronization signal block and the first data.
  • UE1 determines whether to perform concurrent operations according to the signaling or determines how to perform concurrent operations according to other conditions or methods.
  • the first terminal device needs to comprehensively consider the type of S-SSB, the configured S-SSB transceiver status, and the relationship between the relative priorities of the first data and the side synchronization signal block to determine whether to transmit the first data and the side synchronization signal block concurrently.
  • the first terminal device when sending S-SSB, the first terminal device needs to determine whether to receive data sent by the second terminal device or send S-SSB in the synchronization time unit (for example, the first time unit). And,
  • the first terminal device needs to determine whether the second terminal device is receiving the S-SSB sent by the first terminal device in the synchronous time unit, or sending data.
  • the first terminal device determines to send or receive a sideline synchronization signal block on the first time unit.
  • the first terminal device determines to send or receive a side synchronization signal block and/or first data in the first time unit according to usage of the first resource.
  • the first terminal device when the first terminal device successfully sends the first sideline synchronization signal block on the first resource, the first terminal device determines to send the first data on the first time unit.
  • the first terminal device determines to send the sideline synchronization signal block and/or the first data on the first time unit according to the priority of the sideline synchronization signal block and/or the first data.
  • the first terminal device determines to send or receive the sideline synchronization signal block on the first time unit: the priority of the sideline synchronization signal block is higher than the priority of the first data; the priority of the sideline synchronization signal block is higher than the configured first priority threshold; the priority of the sideline synchronization signal block is higher than the priority of the first data, and the priority of the sideline synchronization signal block is higher than the configured first priority threshold;
  • the first terminal determines to send or receive the first data on the first time unit: the priority of the first data is higher than the priority of the sideline synchronization signal block; the priority of the first data is higher than the configured first priority threshold; the priority of the first data is higher than the priority of the sideline synchronization signal block, and the priority of the first data is higher than the configured first priority threshold;
  • the first terminal device when the first terminal device does not send or receive the first sideline synchronization signal block on the first resource, the first The terminal device determines to send a side synchronization signal block and/or first data in a first time unit according to the indication information.
  • the first terminal device determines to send or receive a side line synchronization signal block on the first time unit: the first terminal device obtains first information, and the first information is used to indicate the sending side line synchronization signal block; the first terminal device obtains second information, and the second information is used to indicate the sending side line synchronization signal block and the first data.
  • the first terminal determines to send or receive the first data in the first time unit: the first terminal device obtains third information, and the third information is used to indicate the sending of the first data; the first terminal device obtains fourth information, and the fourth information is used to indicate the sending side synchronization signal block and the first data.
  • the first terminal device needs to comprehensively consider the type of S-SSB, the configured S-SSB receiving and transmitting status, and the relationship between the relative priorities of the first data and the side synchronization signal block to determine whether to prioritize the first data or the side synchronization signal block.
  • This method can ensure that the terminal device prioritizes more important information and reduce the impact on the system.
  • FIG15 is a schematic block diagram of a communication device 1000 provided in an embodiment of the present application.
  • the device 1000 may include a transceiver unit 1010 and a processing unit 1020.
  • the transceiver unit 1010 may communicate with the outside, the processing unit 1020 is used for data processing, and the transceiver unit 1010 may also be referred to as a communication interface or a transceiver unit.
  • the device 1000 can implement steps or processes corresponding to those performed by the first terminal device (for example, UE1) in the above method embodiment, wherein the processing unit 1020 is used to perform processing-related operations of the first terminal device in the above method embodiment, and the transceiver unit 1010 is used to perform transceiver-related operations of the first terminal device in the above method embodiment.
  • the first terminal device for example, UE1
  • the processing unit 1020 is used to perform processing-related operations of the first terminal device in the above method embodiment
  • the transceiver unit 1010 is used to perform transceiver-related operations of the first terminal device in the above method embodiment.
  • the device 1000 can implement steps or processes corresponding to those performed by the second terminal device (for example, UE2) in the above method embodiments, wherein the transceiver unit 1010 is used to perform transceiver-related operations of the second terminal device in the above method embodiments, and the processing unit 1020 is used to perform processing-related operations of the second terminal device in the above method embodiments.
  • the second terminal device for example, UE2
  • the transceiver unit 1010 is used to perform transceiver-related operations of the second terminal device in the above method embodiments
  • the processing unit 1020 is used to perform processing-related operations of the second terminal device in the above method embodiments.
  • the device 1000 here is embodied in the form of a functional unit.
  • the term "unit” here may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a dedicated processor or a group processor, etc.) and a memory for executing one or more software or firmware programs, a merged logic circuit and/or other suitable components that support the described functions.
  • ASIC application specific integrated circuit
  • processor such as a shared processor, a dedicated processor or a group processor, etc.
  • memory for executing one or more software or firmware programs, a merged logic circuit and/or other suitable components that support the described functions.
  • the device 1000 can be specifically the transmitting end in the above-mentioned embodiment, and can be used to execute the various processes and/or steps corresponding to the transmitting end in the above-mentioned method embodiment, or the device 1000 can be specifically the receiving end in the above-mentioned embodiment, and can be used to execute the various processes and/or steps corresponding to the receiving end in the above-mentioned method embodiment. To avoid repetition, it will not be repeated here.
  • the device 1000 of each of the above-mentioned solutions has the function of implementing the corresponding steps performed by the sending end in the above-mentioned method, or the device 1000 of each of the above-mentioned solutions has the function of implementing the corresponding steps performed by the receiving end in the above-mentioned method.
  • the functions can be implemented by hardware, or by hardware executing corresponding software implementations.
  • the hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the transceiver unit can be replaced by a transceiver (for example, the sending unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units, such as the processing unit, can be replaced by a processor, respectively performing the transceiver operations and related processing operations in each method embodiment.
  • a transceiver for example, the sending unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver
  • other units such as the processing unit
  • the above-mentioned transceiver unit can also be a transceiver circuit (for example, it can include a receiving circuit and a transmitting circuit), and the processing unit can be a processing circuit.
  • the device in Figure 15 can be the receiving end or the transmitting end in the aforementioned embodiment, or it can be a chip or a chip system, for example: a system on chip (system on chip, SoC).
  • the transceiver unit can be an input and output circuit, a communication interface.
  • the processing unit is a processor or a microprocessor or an integrated circuit integrated on the chip. This is not limited here.
  • FIG16 shows a schematic block diagram of a communication device 2000 provided in an embodiment of the present application.
  • the device 2000 includes a processor 2010 and a transceiver 2020.
  • the processor 2010 and the transceiver 2020 communicate with each other through an internal connection path, and the processor 2010 is used to execute instructions to control the transceiver 2020 to send signals and/or receive signals.
  • the device 2000 may further include a memory 2030, which communicates with the processor 2010 and the transceiver 2020 via an internal The connection paths communicate with each other.
  • the memory 2030 is used to store instructions, and the processor 2010 can execute the instructions stored in the memory 2030.
  • the apparatus 2000 is used to implement various processes and steps corresponding to the first terminal device (eg, UE1) in the above method embodiment.
  • the first terminal device eg, UE1
  • the apparatus 2000 is used to implement the various processes and steps corresponding to the second terminal device (eg, UE2) in the above method embodiment.
  • the second terminal device eg, UE2
  • the device 2000 can be specifically the transmitting end or receiving end in the above embodiment, or a chip or a chip system.
  • the transceiver 2020 can be a transceiver circuit of the chip, which is not limited here.
  • the device 2000 can be used to execute each step and/or process corresponding to the transmitting end or receiving end in the above method embodiment.
  • the memory 2030 may include a read-only memory and a random access memory, and provide instructions and data to the processor.
  • a portion of the memory may also include a non-volatile random access memory.
  • the memory may also store information about the device type.
  • the processor 2010 may be used to execute instructions stored in the memory, and when the processor 2010 executes instructions stored in the memory, the processor 2010 is used to execute the various steps and/or processes of the above-mentioned method embodiment corresponding to the transmitting end or the receiving end.
  • each step of the above method can be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software.
  • the steps of the method disclosed in conjunction with the embodiment of the present application can be directly embodied as a hardware processor for execution, or a combination of hardware and software modules in a processor for execution.
  • the software module can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc.
  • the storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it is not described in detail here.
  • the processor in the embodiment of the present application can be an integrated circuit chip with signal processing capabilities.
  • each step of the above method embodiment can be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software.
  • the above processor can be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component.
  • the processor in the embodiment of the present application can implement or execute the methods, steps and logic block diagrams disclosed in the embodiment of the present application.
  • the general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.
  • the steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to execute, or the hardware and software modules in the decoding processor can be combined and executed.
  • the software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc.
  • the storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories.
  • the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory.
  • the volatile memory can be a random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • SRAM static RAM
  • DRAM dynamic RAM
  • SDRAM synchronous DRAM
  • DDR SDRAM double data rate SDRAM
  • ESDRAM enhanced SDRAM
  • SLDRAM synchlink DRAM
  • DR RAM direct rambus RAM
  • FIG17 is a schematic block diagram of a chip system 3000 provided in an embodiment of the present application.
  • the chip system 3000 (or also referred to as a processing system) includes a logic circuit 3010 and an input/output interface 3020.
  • the logic circuit 3010 can be a processing circuit in the chip system 3000.
  • the logic circuit 3010 can be coupled to the storage unit and call the instructions in the storage unit so that the chip system 3000 can implement the methods and functions of each embodiment of the present application.
  • the input/output interface 3020 can be an input/output circuit in the chip system 3000, outputting information processed by the chip system 3000, or inputting data or signaling information to be processed into the chip system 3000 for processing.
  • the chip system 3000 is used to implement the operations performed by the terminal device in the above method embodiments.
  • the logic circuit 3010 is used to implement the processing-related operations performed by the first terminal device in the above method embodiment, such as the processing-related operations performed by the first terminal device in the embodiment shown in FIG. 5, or the processing-related operations performed by the first terminal device in the embodiment shown in FIG. 9, or the processing-related operations performed by the first terminal device in the embodiment shown in FIG. 14;
  • the input/output interface 3020 is used to implement the sending and/or receiving-related operations performed by the first terminal device in the above method embodiment, such as the first terminal device in the embodiment shown in FIG. 5
  • the sending and/or receiving related operations are performed by the first terminal device in the embodiment shown in FIG. 9 , or the sending and/or receiving related operations are performed by the first terminal device in the embodiment shown in FIG. 14 .
  • the logic circuit 3010 is used to implement the processing-related operations performed by the second terminal device in the above method embodiments, such as the processing-related operations performed by the second terminal device in the embodiment shown in Figure 5, or the processing-related operations performed by the second terminal device in the embodiment shown in Figure 9, or the processing-related operations performed by the second terminal device in the embodiment shown in Figure 14;
  • the input/output interface 3020 is used to implement the sending and/or receiving-related operations performed by the second terminal device in the above method embodiments, such as the sending and/or receiving-related operations performed by the second terminal device in the embodiment shown in Figure 5, or the sending and/or receiving-related operations performed by the second terminal device in the embodiment shown in Figure 9, or the sending and/or receiving-related operations performed by the second terminal device in the embodiment shown in Figure 14.
  • An embodiment of the present application also provides a computer-readable storage medium on which computer instructions for implementing the methods executed by a terminal device (such as a first terminal device or a second terminal device) in the above-mentioned method embodiments are stored.
  • a terminal device such as a first terminal device or a second terminal device
  • An embodiment of the present application also provides a computer program product, comprising instructions, which, when executed by a computer, implement the methods performed by a terminal device (such as a first terminal device or a second terminal device) in the above-mentioned method embodiments.
  • a terminal device such as a first terminal device or a second terminal device
  • An embodiment of the present application also provides a communication system, which includes the first terminal device and the second terminal device in the above embodiments.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.
  • Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server, or device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application.
  • the aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories, random access memories, magnetic disks, or optical disks.

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Abstract

Les modes de réalisation de la présente demande proposent un procédé et un appareil de communication. Le procédé comprend les étapes suivantes : un premier équipement terminal détermine M ensembles de ressources de domaine fréquentiel, comprenant de premiers ensembles de ressources de domaine fréquentiel et un second ensemble de ressources de domaine fréquentiel, le second ensemble de ressources de domaine fréquentiel comprenant des ressources de domaine fréquentiel de ressources de signal de synchronisation de liaison latérale, et les premiers ensembles de ressources de domaine fréquentiel étant M-1 ensembles de ressources de domaine fréquentiel autres que le second ensemble de ressources de domaine fréquentiel ; et le premier équipement terminal envoie un bloc de signal de synchronisation de liaison latérale et un premier signal sur une première unité de temps, le bloc de signal de synchronisation de liaison latérale étant situé dans le second ensemble de ressources de domaine fréquentiel, le premier signal étant situé dans un premier ensemble de ressources de domaine fréquentiel, le premier signal comprenant un canal de diffusion de liaison latérale physique (PSBCH), et le premier signal étant déterminé au moyen d'un indice d'un ensemble de ressources de domaine fréquentiel. Le procédé divulgué dans la présente demande garantit que les signaux envoyés à partir d'un premier ensemble de ressources de domaine fréquentiel et d'un second ensemble de ressources de domaine fréquentiel sur une première unité de temps sont différents, de façon à éviter l'impact d'un rapport crête sur moyenne élevé, ce qui permet d'améliorer les performances de transmission du système.
PCT/CN2023/128198 2022-11-04 2023-10-31 Procédé et appareil de communication WO2024093972A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CN202211379721.9 2022-11-04
CN202211379721 2022-11-04
CN202310182634 2023-02-17
CN202310182634.2 2023-02-17
CN202311010855.8 2023-08-11
CN202311010855.8A CN117201254A (zh) 2022-11-04 2023-08-11 通信方法和装置

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108809558A (zh) * 2017-04-28 2018-11-13 维沃移动通信有限公司 一种同步信号块的传输方法、网络设备及用户设备
WO2020091500A1 (fr) * 2018-11-02 2020-05-07 엘지전자 주식회사 Procédé pour la transmission et la réception d'un signal de synchronisation dans une communication sans fil de dispositif à dispositif, et appareil associé
CN112997551A (zh) * 2019-03-28 2021-06-18 Oppo广东移动通信有限公司 传输侧行信道的方法和终端设备
WO2021237675A1 (fr) * 2020-05-29 2021-12-02 Oppo广东移动通信有限公司 Procédé de communication sans fil et dispositif terminal
CN115175296A (zh) * 2021-04-02 2022-10-11 华为技术有限公司 一种非授权频谱中的同步方法和装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108809558A (zh) * 2017-04-28 2018-11-13 维沃移动通信有限公司 一种同步信号块的传输方法、网络设备及用户设备
WO2020091500A1 (fr) * 2018-11-02 2020-05-07 엘지전자 주식회사 Procédé pour la transmission et la réception d'un signal de synchronisation dans une communication sans fil de dispositif à dispositif, et appareil associé
CN112997551A (zh) * 2019-03-28 2021-06-18 Oppo广东移动通信有限公司 传输侧行信道的方法和终端设备
WO2021237675A1 (fr) * 2020-05-29 2021-12-02 Oppo广东移动通信有限公司 Procédé de communication sans fil et dispositif terminal
CN115175296A (zh) * 2021-04-02 2022-10-11 华为技术有限公司 一种非授权频谱中的同步方法和装置

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