Communication method and communication apparatus

Abstract

The present application relates to the technical field of communications, and provides a communication method and a communication apparatus. The method comprises: receiving a first synchronization signal block (SSB), the first SSB being included among N SSBs, time domain resources of the N SSBs being the same, the N SSBs being carried on N frequency domain resources which do not overlap, and each SSB among the N SSBs comprising a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); and performing synchronization on the basis of the first SSB, wherein the N SSBs satisfy one or more of the following situations: signal sequences of PSSs in at least two SSBs among the N SSBs are different, signal sequences of SSSs in at least two SSBs among the N SSBs are different, or scrambling code sequences corresponding to SSSs in at least two SSBs among the N SSBs are different. The method in embodiments of the present application can avoid or reduce an increase in a downlink PAPR, thereby reducing energy loss of a system.

Description

Communication methods and communication devices

[0001] This application claims priority to Chinese Patent Application No. 202411937868.4, filed with the State Intellectual Property Office of China on December 25, 2024, entitled "Communication Method and Communication Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, and more specifically to communication methods and communication devices. Background Technology

[0003] With the development of communication technology, downlink common signals in some communication systems can be transmitted using frequency division to reduce the time domain proportion of downlink common signals, thereby reducing system power consumption.

[0004] However, frequency division multiplexing (FDM) still has some problems. For example, when the downlink common signal is transmitted using FDM, it may lead to a decrease in the efficiency of the power amplifier, resulting in unnecessary energy loss. Summary of the Invention

[0005] This application provides a communication method and communication device that can avoid or reduce downlink PAPR increase (including reducing the occurrence of downlink PAPR increase and / or reducing the magnitude of downlink PAPR increase), thereby reducing system energy consumption.

[0006] In a first aspect, a communication method is provided, which is applied to the terminal device side. That is, the communication method can be executed by the terminal device, or by a device in the terminal device (e.g., a chip, a chip system, a circuit, or a processor), or by a device that can be matched with the terminal device, or by a logic module or software that can implement all or part of the terminal device.

[0007] The method includes: receiving a first synchronization signal block (SSB), the first SSB comprising N SSBs, the N SSBs having identical time-domain resources, the N SSBs being carried on N non-overlapping frequency-domain resources, where N is a positive integer, and each of the N SSBs including a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); performing synchronization based on the first SSB; wherein the N SSBs satisfy one or more of the following conditions: the signal sequences of the PSSs in at least two of the N SSBs are different, the signal sequences of the SSSs in at least two of the N SSBs are different, or the scrambling sequences corresponding to the SSSs in at least two of the N SSBs are different.

[0008] In this embodiment, N SSBs are located within the same time-domain resource and are carried on N non-overlapping frequency-domain resources. The N SSBs satisfy one or more of the following conditions: the signal sequences of the PSS within at least two of the N SSBs are different; the signal sequences of the SSS within at least two of the N SSBs are different; or the scrambling sequences corresponding to the SSS within at least two of the N SSBs are different. In this way, the increase of downlink peak-to-average power ratio (PAPR) can be avoided or reduced, and the efficiency reduction of the power amplifier can be avoided or reduced (including reducing the occurrence of power amplifier efficiency reduction and / or reducing the magnitude of power amplifier efficiency reduction), thereby reducing the energy loss of the system.

[0009] Optionally, the N SSBs satisfy one or more of the following conditions: the signal sequences of the PSS in at least two of the N SSBs are different; the signal sequences of the SSS in at least two of the N SSBs are different; the scrambling sequences corresponding to the SSS in at least two of the N SSBs are different; or the scrambling sequences corresponding to the PSS in at least two of the N SSBs are different.

[0010] In some possible implementations, the N SSBs satisfy one or more of the following conditions:

[0011] Among the N SSBs, at least one SSB's PSS is generated based on a first part of the cell index and a first offset value, where the first part of the cell index is used to generate the physical cell identifier.

[0012] Of the N SSBs, at least one SSB's SSS is generated based on the second part of the cell index and the second offset value, where the second part of the cell index is used to generate the physical cell identifier; or...

[0013] Among the N SSBs, at least one SSS within an SSB is generated based on the second part of the cell index, and the scrambling sequence of the SSS within at least one SSB is generated based on the third offset value. The second part of the cell index is used to generate the physical cell identifier.

[0014] In the embodiments of this application, the PSS within at least one SSB is generated based on the first partial cell index and the first offset value. This helps to make the signal sequences of the PSS within at least two SSBs different, thereby helping to avoid or reduce downlink PAPR increases and reduce system energy consumption.

[0015] In the embodiments of this application, the SSS within at least one SSB is generated based on the second part of the cell index and the second offset value. This helps to make the signal sequences of the SSS within at least two SSBs different, thereby helping to avoid or reduce downlink PAPR elevation and reduce system energy consumption.

[0016] In the embodiments of this application, the scrambling sequence of the SSS within at least one SSB is generated based on a third offset value. This helps to ensure that the scrambling sequences corresponding to the SSS within at least two SSBs are different, thereby helping to avoid or reduce downlink PAPR increases and reduce system energy consumption.

[0017] Optionally, the N SSBs satisfy one or more of the following conditions:

[0018] Among the N SSBs, at least one SSB's PSS is generated based on a first part of the cell index and a first offset value, where the first part of the cell index is used to generate the physical cell identifier.

[0019] Among the N SSBs, at least one SSS within an SSB is generated based on the second part of the cell index and the second offset value, where the second part of the cell index is used to generate the physical cell identifier.

[0020] Of the N SSBs, at least one SSS within an SSB is generated based on the second part of the cell index, and the scrambling sequence of the SSS within at least one SSB is generated based on the third offset value. The second part of the cell index is used to generate the physical cell identifier; or,

[0021] Of the N SSBs, at least one SSB's PSS is generated based on the first part of the cell index, and at least one SSB's PSS scrambling sequence is generated based on the fourth offset value. The first part of the cell index is used to generate the physical cell identifier.

[0022] In some possible implementations, the first offset value corresponding to the PSS within the at least one SSB is determined based on the offset of the frequency domain position of the at least one SSB relative to the first reference frequency domain position, or the first offset value corresponding to the PSS within the at least one SSB is determined based on the index of the at least one SSB.

[0023] Optionally, the first reference frequency domain position can be specified by the communication protocol or preset.

[0024] For example, suppose there are 3 SSBs (i.e., N=3) within the same time-domain resource. Following the ascending frequency order of the frequency domain resources, the indices (or numbers) of these 3 SSBs are SSB#0, SSB#1, and SSB#2, respectively. The first reference frequency domain position can be preset or specified by the communication protocol as the center frequency of SSB#0; that is, the center frequency of the SSB with the smallest index among the 3 SSBs is the first reference frequency domain position. In this case, the offset of the center frequency of SSB#1 relative to the first reference frequency domain position (i.e., the center frequency of SSB#0) is X Hz, and the offset of the center frequency of SSB#2 relative to the first reference frequency domain position is 2*X Hz, where X can be a preset value.

[0025] In some possible implementations, the second offset value corresponding to the SSS within the at least one SSB is determined based on the offset of the frequency domain position of the at least one SSB relative to the second reference frequency domain position, or the second offset value corresponding to the SSS within the at least one SSB is determined based on the index of the at least one SSB.

[0026] Optionally, the second reference frequency domain location can be specified by the communication protocol or preset.

[0027] For example, assuming there are 3 SSBs (i.e., N=3) within the same time-domain resource, and their indices (or numbers) are SSB#0, SSB#1, and SSB#2, arranged in ascending order of frequency in the frequency domain, the second reference frequency domain position can be preset or specified by the communication protocol as the center frequency of SSB#0. In other words, the center frequency of the SSB with the smallest index among the 3 SSBs is the second reference frequency domain position. In this case, the offset of the center frequency of SSB#1 relative to the second reference frequency domain position (i.e., the center frequency of SSB#0) is X Hz, and the offset of the center frequency of SSB#2 relative to the second reference frequency domain position is 2*X Hz, where X can be a preset value.

[0028] In some possible implementations, the third offset value corresponding to the SSS within the at least one SSB is determined based on the offset of the frequency domain position of the at least one SSB relative to the third reference frequency domain position, or the third offset value corresponding to the SSS within the at least one SSB is determined based on the index of the at least one SSB, or the third offset value corresponding to the SSS within the at least one SSB is determined based on the index of the at least one SSB among N SSBs.

[0029] Optionally, the location of the third reference frequency domain can be specified by the communication protocol or preset.

[0030] For example, suppose there are 3 SSBs (i.e., N=3) within the same time-domain resource. Following the ascending frequency order of the frequency domain resources, the indices (or numbers) of these 3 SSBs are SSB#0, SSB#1, and SSB#2, respectively. The third reference frequency domain position can be preset or specified by the communication protocol as the center frequency of SSB#0. That is, the center frequency of the SSB with the smallest index among the 3 SSBs is the third reference frequency domain position. In this case, the offset of the center frequency of SSB#1 relative to the third reference frequency domain position (i.e., the center frequency of SSB#0) is X Hz, and the offset of the center frequency of SSB#2 relative to the third reference frequency domain position is 2*X Hz, where X can be a preset value.

[0031] Optionally, the third offset value corresponding to the SSS within the at least one SSB is determined based on the index of the at least one SSB, which can be understood as: the third offset value is determined based on the absolute index of the at least one SSB.

[0032] For example, assuming there are 3 SSBs (i.e., N=3) within the same time domain resource, and the indices (or numbers) of these 3 SSBs are SSB#3, SSB#4, and SSB#5 in ascending order of frequency in the frequency domain resource, then the third offset value corresponding to these 3 SSBs can be: the absolute index of the SSB mod N, that is, the third offset value corresponding to SSB#3 is 3 mod 3 = 0, the third offset value corresponding to SSB#4 is 4 mod 3 = 1, and the third offset value corresponding to SSB#5 is 5 mod 3 = 2.

[0033] Optionally, the third offset value corresponding to the SSS within the at least one SSB is determined based on the index of the at least one SSB among the N SSBs, which can be understood as: the third offset value is determined based on the relative index of the at least one SSB among the N SSBs.

[0034] For example, suppose there are 3 SSBs (i.e., N=3) within the same time domain resource, and the indices (or numbers) of these 3 SSBs are SSB#3, SSB#4, and SSB#5 respectively. According to the frequency domain resource in ascending order of frequency, the relative index of SSB#3 among these 3 SSBs is 1, the relative index of SSB#4 among these 3 SSBs is 2, and the relative index of SSB#5 among these 3 SSBs is 3. Then the third offset value corresponding to these 3 SSBs can be: SSB relative index mod N, that is, the third offset value corresponding to SSB#3 is 1 mod 3 = 1, the third offset value corresponding to SSB#4 is 2 mod 3 = 2, and the third offset value corresponding to SSB#5 is 3 mod 3 = 0.

[0035] Secondly, a communication method is provided, which is applied to the terminal device side. That is, the communication method can be executed by the terminal device, or by a device in the terminal device (e.g., a chip, a chip system, a circuit, or a processor), or by a device that can be matched with the terminal device, or by a logic module or software that can implement all or part of the terminal device.

[0036] The method includes: receiving a first synchronization signal block (SSB), the first SSB including a set of synchronization signals (SS) and M physical broadcast channels (PBCHs), the M PBCHs being carried on M non-overlapping frequency domain resources, where M is an integer greater than 1, and at least two of the M PBCHs having different scrambling sequences; and performing synchronization based on the first SSB.

[0037] In the embodiments of this application, M PBCHs are carried on M non-overlapping frequency domain resources, and at least two of the M PBCHs have different scrambling sequences. In this way, downlink PAPR can be avoided or reduced, the efficiency of the power amplifier can be avoided or reduced, and the energy loss of the system can be reduced.

[0038] In some possible implementations, the scrambling sequence of at least one PBCH among the M PBCHs is determined according to the index of the at least one PBCH, or the scrambling sequence of the at least one PBCH is determined according to the index of the at least one PBCH among the M PBCHs.

[0039] In the embodiments of this application, the scrambling sequence of at least one PBCH is determined based on the index of at least one PBCH, or the scrambling sequence of at least one PBCH is determined based on the index of at least one PBCH in M ​​PBCHs. This helps to make the scrambling sequences of at least two PBCHs in M ​​PBCHs different, thereby helping to avoid or reduce downlink PAPR increase and reduce system energy loss.

[0040] In some possible implementations, the first SSB further includes M demodulation reference signals (DMRS), each of which corresponds one-to-one with the M PBCHs, and at least two of the M DRMS ​​have different signal sequences and / or different scrambling sequences.

[0041] In some possible implementations, the signal sequence of at least one of the M DMRSs is determined based on the index of at least one PBCH corresponding to the at least one DMRS; and / or,

[0042] Of the M DMRS, the signal sequence of at least one DMRS is determined according to the index of the first SSB, and the scrambling sequence of the at least one DMRS is determined according to the index of at least one PBCH corresponding to the at least one DMRS, or the scrambling sequence of the at least one DMRS is determined according to the index of at least one PBCH corresponding to the at least one DMRS in the M PBCHs.

[0043] In some possible implementations, the index of the at least one PBCH is determined based on one or more of the following information:

[0044] The index of the first SSB and the frequency domain resources of the DMRS corresponding to the at least one PBCH, the signal sequence of the DMRS corresponding to the at least one PBCH, or the scrambling sequence of the DMRS corresponding to the at least one PBCH;

[0045] The index of the at least one PBCH in the M PBCHs is determined based on one or more of the following information:

[0046] The index of the first SSB and the frequency domain resources of the DMRS corresponding to the at least one PBCH, the signal sequence of the DMRS corresponding to the at least one PBCH, or the scrambling sequence of the DMRS corresponding to the at least one PBCH.

[0047] Thirdly, a communication method is provided, which is applied to the terminal device side. That is, the communication method can be executed by the terminal device, or by a device in the terminal device (e.g., a chip, a chip system, a circuit, or a processor), or by a device that can be matched with the terminal device, or by a logic module or software that can implement all or part of the terminal device.

[0048] The method includes: receiving a first downlink control information (DCI), wherein the first DCI is one of T DCIs, each of the T DCIs is used to schedule a terminal device to receive a common downlink shared channel, and T is an integer greater than 1; receiving the first common downlink shared channel and a first demodulation reference signal (DMRS) corresponding to the first common downlink shared channel, wherein the first common downlink shared channel is one of the T common downlink shared channels, the first DMRS is one of the T DMRSs, the T common downlink shared channels correspond one-to-one with the T DMRSs, at least two of the T common downlink shared channels are scrambled by different scrambling sequences, and / or, at least two of the T DMRSs have different signal sequences.

[0049] In the embodiments of this application, T common downlink shared channels correspond one-to-one with T DMRS. At least two of the T common downlink shared channels are scrambled with different scrambling sequences, and / or at least two of the T DMRS have different signal sequences. In this way, the downlink PAPR can be avoided or reduced, the efficiency reduction of the power amplifier can be avoided or reduced, and the energy loss of the system can be reduced.

[0050] In some possible implementations, the T DCIs correspond to T synchronization signal blocks (SSBs).

[0051] In some possible implementations, the scrambling sequence of at least one of the T common downlink shared channels is a sequence obtained by initializing with a first initialization factor, and the first initialization factor corresponding to the at least one common downlink shared channel is generated based on the offset value of the first initialization factor.

[0052] In this embodiment, the first initialization factor corresponding to at least one of the T common downlink shared channels is generated based on the offset value of the first initialization factor. This helps to ensure that at least two common downlink shared channels are scrambled by different scrambling code sequences, thereby helping to avoid or reduce downlink PAPR increase and reduce system energy loss.

[0053] In some possible implementations, the first initialization factor offset value corresponding to the at least one common downlink shared channel is indicated by downlink control information, or the first initialization factor offset value corresponding to the at least one common downlink shared channel is determined according to the index of the synchronization signal block (SSB) corresponding to the at least one common downlink shared channel.

[0054] In the embodiments of this application, the first initialization factor offset value corresponding to at least one common downlink shared channel is indicated by downlink control information, or the first initialization factor offset value corresponding to at least one common downlink shared channel is determined according to the index of the SSB corresponding to at least one common downlink shared channel. In this way, the first initialization factor offset value can be flexibly determined according to actual needs.

[0055] In some possible implementations, the signal sequence of at least one of the T DMRSs is a sequence obtained by initializing it with a second initialization factor, and the second initialization factor corresponding to the at least one DMRS is generated based on the offset value of the second initialization factor.

[0056] In this embodiment, the second initialization factor corresponding to at least one of the T DMRSs is generated based on the offset value of the second initialization factor. This helps to make the signal sequences of at least two DMRSs in the T DMRSs different, thereby helping to avoid or reduce downlink PAPR increase and reduce system energy loss.

[0057] In some possible implementations, the second initialization factor offset value corresponding to the at least one DMRS is indicated by downlink control information, or the second initialization factor offset value corresponding to the at least one DMRS is determined based on the index of the synchronization signal block SSB corresponding to the at least one DMRS.

[0058] In the embodiments of this application, the second initialization factor offset value corresponding to at least one DMRS is indicated by downlink control information, or the second initialization factor offset value corresponding to at least one DMRS is determined according to the index of the SSB corresponding to at least one DMRS. In this way, the second initialization factor offset value can be flexibly determined according to actual needs.

[0059] In some possible implementations, the T DCIs are located within the same time domain resource, and the T DCIs are carried on T non-overlapping frequency domain resources; and / or, at least two of the T common downlink shared channels are located within the same time domain resource, and at least two of the T common downlink shared channels are carried on non-overlapping frequency domain resources.

[0060] Optionally, the T common downlink shared channels scheduled by the T DCIs are located within the same time domain resource, and the T common downlink shared channels are carried on T non-overlapping frequency domain resources.

[0061] In some possible implementations, the common downlink shared channel is used to carry system information or paging messages.

[0062] Fourthly, a communication method is provided, which is applied to the network device side. That is, the communication method can be executed by the network device, or by a device in the network device (e.g., a chip, a chip system, a circuit, or a processor), or by a device that can be used in conjunction with the network device, or by a logic module or software that can implement all or part of the network device.

[0063] The method includes: generating a first synchronization signal block (SSB), the first SSB comprising N SSBs, the N SSBs having identical time-domain resources, the N SSBs being carried on N non-overlapping frequency-domain resources, where N is a positive integer, and each of the N SSBs including a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); transmitting the first SSB; wherein the N SSBs satisfy one or more of the following conditions: the signal sequences of the PSSs in at least two of the N SSBs are different, the signal sequences of the SSSs in at least two of the N SSBs are different, or the scrambling sequences corresponding to the SSSs in at least two of the N SSBs are different.

[0064] In this embodiment, N SSBs are located in the same time domain resource and are carried on N non-overlapping frequency domain resources. The N SSBs satisfy one or more of the following conditions: the signal sequences of the PSS in at least two of the N SSBs are different, the signal sequences of the SSS in at least two of the N SSBs are different, or the scrambling sequences corresponding to the SSS in at least two of the N SSBs are different. In this way, the increase of downlink peak to average power ratio (PAPR) can be avoided or reduced, the efficiency reduction of power amplifier can be avoided or reduced, and the energy loss of the system can be reduced.

[0065] Optionally, the N SSBs satisfy one or more of the following conditions: the signal sequences of the PSS in at least two of the N SSBs are different; the signal sequences of the SSS in at least two of the N SSBs are different; the scrambling sequences corresponding to the SSS in at least two of the N SSBs are different; or the scrambling sequences corresponding to the PSS in at least two of the N SSBs are different.

[0066] In some possible implementations, the N SSBs satisfy one or more of the following conditions:

[0067] Among the N SSBs, at least one SSB's PSS is generated based on a first part of the cell index and a first offset value, where the first part of the cell index is used to generate the physical cell identifier.

[0068] Of the N SSBs, at least one SSB's SSS is generated based on the second part of the cell index and the second offset value, where the second part of the cell index is used to generate the physical cell identifier; or...

[0069] Among the N SSBs, at least one SSS within an SSB is generated based on the second part of the cell index, and the scrambling sequence of the SSS within at least one SSB is generated based on the third offset value. The second part of the cell index is used to generate the physical cell identifier.

[0070] In the embodiments of this application, the PSS within at least one SSB is generated based on the first partial cell index and the first offset value. This helps to make the signal sequences of the PSS within at least two SSBs different, thereby helping to avoid or reduce downlink PAPR increases and reduce system energy consumption.

[0071] In the embodiments of this application, the SSS within at least one SSB is generated based on the second part of the cell index and the second offset value. This helps to make the signal sequences of the SSS within at least two SSBs different, thereby helping to avoid or reduce downlink PAPR elevation and reduce system energy consumption.

[0072] In the embodiments of this application, the scrambling sequence of the SSS within at least one SSB is generated based on a third offset value. This helps to ensure that the scrambling sequences corresponding to the SSS within at least two SSBs are different, thereby helping to avoid or reduce downlink PAPR increases and reduce system energy consumption.

[0073] Optionally, the N SSBs satisfy one or more of the following conditions:

[0074] Among the N SSBs, at least one SSB's PSS is generated based on a first part of the cell index and a first offset value, where the first part of the cell index is used to generate the physical cell identifier.

[0075] Of the N SSBs, at least one SSB's SSS is generated based on the second part of the cell index and the second offset value, where the second part of the cell index is used to generate the physical cell identifier; or...

[0076] Of the N SSBs, at least one SSS within an SSB is generated based on the second part of the cell index, and the scrambling sequence of the SSS within at least one SSB is generated based on the third offset value. The second part of the cell index is used to generate the physical cell identifier; or,

[0077] Of the N SSBs, at least one SSB's PSS is generated based on the first part of the cell index, and at least one SSB's PSS scrambling sequence is generated based on the fourth offset value. The first part of the cell index is used to generate the physical cell identifier.

[0078] In some possible implementations, the first offset value corresponding to the PSS within the at least one SSB is determined based on the offset of the frequency domain position of the at least one SSB relative to the first reference frequency domain position, or the first offset value corresponding to the PSS within the at least one SSB is determined based on the index of the at least one SSB.

[0079] Optionally, the first reference frequency domain position can be specified by the communication protocol or preset.

[0080] For example, suppose there are 3 SSBs (i.e., N=3) within the same time-domain resource. Following the ascending frequency order of the frequency domain resources, the indices (or numbers) of these 3 SSBs are SSB#0, SSB#1, and SSB#2, respectively. The first reference frequency domain position can be preset or specified by the communication protocol as the center frequency of SSB#0; that is, the center frequency of the SSB with the smallest index among the 3 SSBs is the first reference frequency domain position. In this case, the offset of the center frequency of SSB#1 relative to the first reference frequency domain position (i.e., the center frequency of SSB#0) is X Hz, and the offset of the center frequency of SSB#2 relative to the first reference frequency domain position is 2*X Hz, where X can be a preset value.

[0081] In some possible implementations, the second offset value corresponding to the SSS within the at least one SSB is determined based on the offset of the frequency domain position of the at least one SSB relative to the second reference frequency domain position, or the second offset value corresponding to the SSS within the at least one SSB is determined based on the index of the at least one SSB.

[0082] Optionally, the second reference frequency domain location can be specified by the communication protocol or preset.

[0083] For example, assuming there are 3 SSBs (i.e., N=3) within the same time-domain resource, and their indices (or numbers) are SSB#0, SSB#1, and SSB#2, arranged in ascending order of frequency in the frequency domain, the second reference frequency domain position can be preset or specified by the communication protocol as the center frequency of SSB#0. In other words, the center frequency of the SSB with the smallest index among the 3 SSBs is the second reference frequency domain position. In this case, the offset of the center frequency of SSB#1 relative to the second reference frequency domain position (i.e., the center frequency of SSB#0) is X Hz, and the offset of the center frequency of SSB#2 relative to the second reference frequency domain position is 2*X Hz, where X can be a preset value.

[0084] In some possible implementations, the third offset value corresponding to the SSS within the at least one SSB is determined based on the offset of the frequency domain position of the at least one SSB relative to the third reference frequency domain position, or the third offset value corresponding to the SSS within the at least one SSB is determined based on the index of the at least one SSB, or the third offset value corresponding to the SSS within the at least one SSB is determined based on the index of the at least one SSB among N SSBs.

[0085] Optionally, the location of the third reference frequency domain can be specified by the communication protocol or preset.

[0086] For example, suppose there are 3 SSBs (i.e., N=3) within the same time-domain resource. Following the ascending frequency order of the frequency domain resources, the indices (or numbers) of these 3 SSBs are SSB#0, SSB#1, and SSB#2, respectively. The third reference frequency domain position can be preset or specified by the communication protocol as the center frequency of SSB#0. That is, the center frequency of the SSB with the smallest index among the 3 SSBs is the third reference frequency domain position. In this case, the offset of the center frequency of SSB#1 relative to the third reference frequency domain position (i.e., the center frequency of SSB#0) is X Hz, and the offset of the center frequency of SSB#2 relative to the third reference frequency domain position is 2*X Hz, where X can be a preset value.

[0087] Optionally, the third offset value corresponding to the SSS within the at least one SSB is determined based on the index of the at least one SSB, which can be understood as: the third offset value is determined based on the absolute index of the at least one SSB.

[0088] For example, assuming there are 3 SSBs (i.e., N=3) within the same time domain resource, and the indices (or numbers) of these 3 SSBs are SSB#3, SSB#4, and SSB#5 in ascending order of frequency in the frequency domain resource, then the third offset value corresponding to these 3 SSBs can be: the absolute index of the SSB mod N, that is, the third offset value corresponding to SSB#3 is 3 mod 3 = 0, the third offset value corresponding to SSB#4 is 4 mod 3 = 1, and the third offset value corresponding to SSB#5 is 5 mod 3 = 2.

[0089] Optionally, the third offset value corresponding to the SSS within the at least one SSB is determined based on the index of the at least one SSB among the N SSBs, which can be understood as: the third offset value is determined based on the relative index of the at least one SSB among the N SSBs.

[0090] For example, suppose there are 3 SSBs (i.e., N=3) within the same time domain resource, and the indices (or numbers) of these 3 SSBs are SSB#3, SSB#4, and SSB#5 respectively. According to the frequency domain resource in ascending order of frequency, the relative index of SSB#3 among these 3 SSBs is 1, the relative index of SSB#4 among these 3 SSBs is 2, and the relative index of SSB#5 among these 3 SSBs is 3. Then the third offset value corresponding to these 3 SSBs can be: SSB relative index mod N, that is, the third offset value corresponding to SSB#3 is 1 mod 3 = 1, the third offset value corresponding to SSB#4 is 2 mod 3 = 2, and the third offset value corresponding to SSB#5 is 3 mod 3 = 0.

[0091] Fifthly, a communication method is provided, which is applied to the network device side. That is, the communication method can be executed by the network device, or by a device in the network device (e.g., a chip, a chip system, a circuit, or a processor), or by a device that can be used in conjunction with the network device, or by a logic module or software that can implement all or part of the network device.

[0092] The method includes: generating a first synchronization signal block (SSB), the first SSB including a set of synchronization signals (SS) and M physical broadcast channels (PBCHs), the M PBCHs being carried on M non-overlapping frequency domain resources, where M is an integer greater than 1, and at least two of the M PBCHs having different scrambling sequences; and transmitting the first SSB.

[0093] In the embodiments of this application, M PBCHs are carried on M non-overlapping frequency domain resources, and at least two of the M PBCHs have different scrambling sequences. In this way, downlink PAPR can be avoided or reduced, the efficiency of the power amplifier can be avoided or reduced, and the energy loss of the system can be reduced.

[0094] In some possible implementations, the scrambling sequence of at least one PBCH among the M PBCHs is determined according to the index of the at least one PBCH, or the scrambling sequence of the at least one PBCH is determined according to the index of the at least one PBCH among the M PBCHs.

[0095] In the embodiments of this application, the scrambling sequence of at least one PBCH is determined based on the index of at least two PBCHs, or the scrambling sequence of at least one PBCH is determined based on the index of at least one PBCH in M ​​PBCHs. This helps to make the scrambling sequences of at least two PBCHs in M ​​PBCHs different, thereby helping to avoid or reduce downlink PAPR increase and reduce system energy loss.

[0096] In some possible implementations, the first SSB further includes M demodulation reference signals (DMRS), each of which corresponds one-to-one with the M PBCHs, and at least two of the M DRMS ​​have different signal sequences and / or different scrambling sequences.

[0097] In some possible implementations, the signal sequence of at least one of the M DMRSs is determined based on the index of at least one PBCH corresponding to the at least one DMRS; and / or,

[0098] Of the M DMRS, the signal sequence of at least one DMRS is determined according to the index of the first SSB, and the scrambling sequence of the at least one DMRS is determined according to the index of at least one PBCH corresponding to the at least one DMRS, or the scrambling sequence of the at least one DMRS is determined according to the index of at least one PBCH corresponding to the at least one DMRS in the M PBCHs.

[0099] In some possible implementations, the index of the at least one PBCH is determined based on one or more of the following information:

[0100] The index of the first SSB and the frequency domain resources of the DMRS corresponding to the at least one PBCH, the signal sequence of the DMRS corresponding to the at least one PBCH, or the scrambling sequence of the DMRS corresponding to the at least one PBCH;

[0101] The index of the at least one PBCH in the M PBCHs is determined based on one or more of the following information:

[0102] The index of the first SSB and the frequency domain resources of the DMRS corresponding to the at least one PBCH, the signal sequence of the DMRS corresponding to the at least one PBCH, or the scrambling sequence of the DMRS corresponding to the at least one PBCH.

[0103] In a sixth aspect, a communication method is provided, which is applied to the network device side. That is, the communication method can be executed by the network device, or by a device in the network device (e.g., a chip, a chip system, a circuit, or a processor), or by a device that can be used in conjunction with the network device, or by a logic module or software that can implement all or part of the network device.

[0104] The method includes: sending a first downlink control information (DCI), wherein the first DCI is one of T DCIs, and each of the T DCIs is used to schedule the terminal device to receive a common downlink shared channel, where T is an integer greater than 1;

[0105] Transmit a first common downlink shared channel and a first demodulation reference signal (DMRS) corresponding to the first common downlink shared channel. The first common downlink shared channel is one of T common downlink shared channels, and the first DMRS is one of T DMRS. The T common downlink shared channels correspond one-to-one with the T DMRS. At least two of the T common downlink shared channels are scrambled with different scrambling sequences, and / or at least two of the T DMRS have different signal sequences.

[0106] In the embodiments of this application, T common downlink shared channels correspond one-to-one with T DMRS. At least two of the T common downlink shared channels are scrambled with different scrambling sequences, and / or at least two of the T DMRS have different signal sequences. In this way, the downlink PAPR can be avoided or reduced, the efficiency reduction of the power amplifier can be avoided or reduced, and the energy loss of the system can be reduced.

[0107] In some possible implementations, the T DCIs correspond to T synchronization signal blocks (SSBs).

[0108] In some possible implementations, the scrambling sequence of at least one of the T common downlink shared channels is a sequence obtained by initializing with a first initialization factor, and the first initialization factor corresponding to the at least one common downlink shared channel is generated based on the offset value of the first initialization factor.

[0109] In this embodiment, the first initialization factor corresponding to at least one of the T common downlink shared channels is generated based on the offset value of the first initialization factor. This helps to ensure that at least two common downlink shared channels are scrambled by different scrambling code sequences, thereby helping to avoid or reduce downlink PAPR increase and reduce system energy loss.

[0110] In some possible implementations, the first initialization factor offset value corresponding to the at least one common downlink shared channel is indicated by downlink control information, or the first initialization factor offset value corresponding to the at least one common downlink shared channel is determined according to the index of the synchronization signal block (SSB) corresponding to the at least one common downlink shared channel.

[0111] In the embodiments of this application, the first initialization factor offset value corresponding to at least one common downlink shared channel is indicated by downlink control information, or the first initialization factor offset value corresponding to at least one common downlink shared channel is determined according to the index of the SSB corresponding to at least one common downlink shared channel. In this way, the first initialization factor offset value can be flexibly determined according to actual needs.

[0112] In some possible implementations, the signal sequence of at least one of the T DMRSs is a sequence obtained by initializing it with a second initialization factor, and the second initialization factor corresponding to the at least one DMRS is generated based on the offset value of the second initialization factor.

[0113] In this embodiment, the second initialization factor corresponding to at least one of the T DMRSs is generated based on the offset value of the second initialization factor. This helps to make the signal sequences of at least two DMRSs in the T DMRSs different, thereby helping to avoid or reduce downlink PAPR increase and reduce system energy loss.

[0114] In some possible implementations, the second initialization factor offset value corresponding to the at least one DMRS is indicated by downlink control information, or the second initialization factor offset value corresponding to the at least one DMRS is determined according to the index of the synchronization signal block SSB corresponding to each DMRS.

[0115] In the embodiments of this application, the second initialization factor offset value corresponding to at least one DMRS is indicated by downlink control information, or the second initialization factor offset value corresponding to at least one DMRS is determined according to the index of the SSB corresponding to at least one DMRS. In this way, the second initialization factor offset value can be flexibly determined according to actual needs.

[0116] In some possible implementations, the T DCIs are located within the same time domain resource, and the T DCIs are carried on T non-overlapping frequency domain resources; and / or, at least two of the T common downlink shared channels are located within the same time domain resource, and at least two of the T common downlink shared channels are carried on non-overlapping frequency domain resources.

[0117] Optionally, the T common downlink shared channels scheduled by the T DCIs are located within the same time domain resource, and the T common downlink shared channels are carried on T non-overlapping frequency domain resources.

[0118] In some possible implementations, the common downlink shared channel is used to carry system information or paging messages.

[0119] In a seventh aspect, a communication device is provided, comprising: the communication device may be a terminal device, or a device in the terminal device (e.g., a chip, or a chip system, or a circuit, or a processor), or a device that can be used in conjunction with the terminal device, or a logic module or software that can implement all or part of the terminal device.

[0120] The communication device includes modules that perform the methods / operations / steps / actions described in any of the first to third aspects, or any possible implementation of any of the first to third aspects. These modules can be hardware circuits, software, or a combination of hardware circuits and software.

[0121] Eighthly, a communication device is provided, comprising: the communication device may be a network device, or a device in the network device (e.g., a chip, or a chip system, or a circuit, or a processor), or a device that can be used in conjunction with the network device, or a logic module or software that can implement all or part of the network device.

[0122] The communication device includes modules that perform one-to-one the methods / operations / steps / actions described in any of the fourth to sixth aspects, or any possible implementation of any of the fourth to sixth aspects. These modules can be hardware circuits, software, or a combination of hardware circuits and software.

[0123] A ninth aspect provides a communication device comprising: a processor and a memory, the processor being coupled to the memory, the memory being used to store a computer program (also referred to as code or instructions), the computer program being executed by the processor causing the device to perform a method of any one of the first to third aspects, or any possible implementation of any one of the first to third aspects.

[0124] In some possible implementations, the device also includes a memory coupled to the processor.

[0125] In some possible implementations, there are one or more processors, and / or one or more memories.

[0126] In some possible implementations, the memory can be integrated with the processor, or the memory can be set up separately from the processor.

[0127] In a tenth aspect, a communication device is provided, comprising: a processor and a memory, the processor being coupled to the memory, the memory being used to store a computer program (also referred to as code or instructions), the computer program being executed by the processor causing the device to perform a method of any one of the fourth to sixth aspects, or any possible implementation of any one of the fourth to sixth aspects.

[0128] In some possible implementations, the device also includes a memory coupled to the processor.

[0129] In some possible implementations, there are one or more processors, and / or one or more memories.

[0130] In some possible implementations, the memory can be integrated with the processor, or the memory can be set up separately from the processor.

[0131] Eleventhly, a computer-readable storage medium is provided, on which a computer program (also referred to as code or instructions) is stored, which, when run on a computer, causes the computer to perform the method of any of the above aspects or any possible implementation thereof.

[0132] In a twelfth aspect, a computer program product is provided, comprising: a computer program (also referred to as code or instructions) that, when run on a computer, causes the computer to perform the method in any of the foregoing aspects or any possible implementation thereof.

[0133] In a thirteenth aspect, a chip is provided, comprising: a processor and a memory, the memory for storing a computer program (also referred to as code or instructions), the processor for calling and running the computer program stored in the memory, such that an apparatus or device on which the chip is mounted performs the method of any of the above aspects or any possible implementation thereof.

[0134] In a fourteenth aspect, a communication system is provided, comprising a communication device (such as a terminal device) for performing the methods of any one of the first to third aspects and / or a communication device (such as a network device) for performing the methods of any one of the fourth to sixth aspects. Attached Figure Description

[0135] Figure 1 is a schematic block diagram of a wireless communication system applicable to this application.

[0136] Figure 2 is a schematic diagram of the time-frequency resource structure of an SSB in an embodiment of this application.

[0137] Figure 3 is a schematic diagram of the time-domain transmission pattern of an SSB according to an embodiment of this application.

[0138] Figure 4 is a schematic diagram of an SSB frequency division transmission in an embodiment of this application.

[0139] Figure 5 is a schematic flowchart of a communication method provided in one embodiment of this application.

[0140] Figure 6 is a schematic flowchart of a communication method provided in another embodiment of this application.

[0141] Figure 7 is a schematic flowchart of a communication method provided in another embodiment of this application.

[0142] Figure 8 is a schematic diagram of a public PDSCH frequency division transmission in an embodiment of this application.

[0143] Figure 9 is a schematic structural diagram of a communication device provided in one embodiment of this application.

[0144] Figure 10 is a schematic structural diagram of a communication device provided in another embodiment of this application.

[0145] Figure 11 is a schematic structural diagram of a communication device provided in another embodiment of this application.

[0146] Figure 12 is a schematic structural diagram of a communication device provided in another embodiment of this application.

[0147] Figure 13 is a schematic structural diagram of a communication device provided in another embodiment of this application.

[0148] Figure 14 is a schematic structural diagram of a communication device provided in another embodiment of this application.

[0149] Figure 15 is a schematic structural diagram of an apparatus provided in one embodiment of this application. Detailed Implementation

[0150] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0151] In the description of this application, unless otherwise stated, " / " indicates that the objects before and after are in an "or" relationship. For example, A / B can represent A or B. "And / or" in this application merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone, where A and B can be singular or plural. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple. Additionally, to facilitate a clear description of the technical solutions of the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the terms "first," "second," etc., do not limit the quantity or order of execution, and that "first," "second," etc., do not necessarily imply that they are different. It should be understood that in this application, descriptions such as "in the case of," "if," "when," "if," etc., can be used interchangeably.

[0152] The wireless communication system in this application can be various wireless communication systems, such as 5th generation (5G) systems, new radio (NR) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, satellite and other non-terrestrial communication systems, and communication systems that integrate terrestrial and non-terrestrial communication. The technical solution provided in this application can also be applied to future communication systems.

[0153] The wireless communication system in this application can be various wireless communication systems, such as 5th generation (5G) systems, new radio (NR) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, satellite and other non-terrestrial communication systems, and communication systems that integrate terrestrial and non-terrestrial communication. The technical solution provided in this application can also be applied to future communication systems.

[0154] To facilitate understanding of the embodiments of this application, a communication system applicable to the embodiments of this application will first be described with reference to FIG1. ​​As shown in FIG1, the communication system includes a wireless access network 100. The wireless access network 100 may include at least one network device (FIG. 110a, 110b and 110c in FIG1), and may also include at least one terminal (FIG. 120a to 120g in FIG1).

[0155] The terminal device in this application embodiment may refer to user equipment (UE), station, access terminal, user unit, user station, mobile station, mobile station (MS), remote station, remote terminal, mobile terminal (MT), user terminal, terminal (or terminal device), wireless communication equipment, user agent or user device, etc., or a device used to provide voice or data connectivity to users, or an Internet of Things device. For example, terminal devices include handheld devices with wireless connection functions, vehicle-mounted devices, etc., but this application embodiment does not limit this. The terminal device in this application embodiment may be a mobile phone, cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication function, computing device or other processing device connected to a wireless modem, large screen, vehicle-mounted device (e.g., car, bicycle, electric vehicle, airplane, ship, train, high-speed rail, etc.), wearable device (e.g., smartwatch, smart bracelet, pedometer, smart glasses, etc.), machine type communication (MTC) terminal device, terminal device in 5G network, or terminal device in future evolved public land mobile network (PLMN), etc., and is not limited to this in this application embodiment.The terminal device in the embodiments of this application may also be a tablet computer, a laptop computer, a handheld computer, a mobile internet device (MID), a virtual reality (VR) device, an augmented reality (AR) device, a point of sale (POS) machine, customer-premises equipment (CPE), a light UE, a reduced capability UE (RedCap UE), a wireless terminal in industrial control, a smart home device (e.g., a refrigerator, a television, an air conditioner, an electricity meter, etc.), a smart robot, a robotic arm, workshop equipment, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, or a flying device (e.g., a smart robot, a hot air balloon, a drone, an airplane), etc. Terminal devices can also be vehicle devices, such as vehicle devices, vehicle modules, vehicle chips, on-board units (OBU), or telematics boxes (T-BOX). Terminal devices can also be other devices with terminal functions. For example, a terminal device can also be a device that plays a terminal function in device-to-device (D2D) communication.

[0156] In some implementations, the terminal device can be used to act as a base station. Optionally, the terminal device can act as a scheduling entity to provide sidelink signals between terminal devices in vehicle-to-everything (V2X) or device-to-device (D2D) scenarios. For example, cellular phones and cars can communicate using sidelink signals, or cellular phones and smart home devices can communicate using sidelink signals without relaying communication signals through a base station.

[0157] The network device in this application embodiment can refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network, and can also be called a base station (BS). For example, the network device can be a NodeB, an evolved NodeB (eNodeB), a next-generation NodeB (gNB) in a 5G mobile communication system, a transmission reception point (TRP), an access point (AP), a network device (such as a satellite) in a non-terrestrial network (NTN) system, a base station in a future mobile communication system or an access point (AP) in a WiFi system, a radio controller, relay station, access point, vehicle-mounted equipment, wearable devices, and other network devices in future evolved communication systems, etc.

[0158] In some implementations, multiple RAN nodes can collaborate to assist terminal devices in achieving wireless access, with different RAN nodes each implementing some of the base station's functions. For example, a RAN node (i.e., the network device in this application) can be a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. CUs and DUs can be set up separately or included in the same network element, such as a baseband unit (BBU). RUs can be included in radio frequency equipment or radio frequency units, such as remote radio units (RRUs), active antenna units (AAUs), or remote radio heads (RRHs). In different systems, CUs (or CU-CPs and CU-UPs), DUs, or RUs may have different names, but those skilled in the art will understand their meaning. For example, in an open radio access network (ORAN) system, a CU can also be called an open CU (O-CU), a DU can also be called an open DU (O-DU), a CU-CP can also be called an O-CU-CP, a CU-UP can also be called an O-CU-UP, and a RU can also be called an O-RU. Any of the CU (or CU-CP, CU-UP), DU, and RU units in this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules. It should be understood that this application does not limit the specific technology or equipment form used in the radio access network.

[0159] In some implementations, the network device can be fixed or mobile, and this application does not limit this. For example, a helicopter or drone can be configured as a mobile network device, and one or more cells can move according to the location of the mobile network device. In other examples, a helicopter or drone can be configured as a device to communicate with another network device.

[0160] In some implementations, network devices can be deployed on land or in the air, and this application does not limit this. For example, network devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on airplanes, balloons, and satellites.

[0161] In some implementations, the terminal device in this application embodiment may also be a zero-power terminal, such as an electronic tag. Correspondingly, the network device may be a reader for reading and writing electronic tags (e.g., a reader based on radio frequency identification (RFID) technology).

[0162] In this embodiment, the terminal device or network device may include a hardware layer, an operating system layer running on top of the hardware layer, and an application layer running on top of the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also called main memory). The operating system can be any one or more computer operating systems that implement business processing through processes. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software. Furthermore, this embodiment does not specifically limit the specific structure of the execution entity of the method provided in this embodiment, as long as it can communicate according to the method provided in this embodiment by running a program that records the code of the method provided in this embodiment.

[0163] Furthermore, various aspects or features of this application can be implemented as methods, apparatus, or articles of manufacture using standard programming and / or engineering techniques. The term "article of manufacture" as used herein encompasses a computer program accessible from any computer-readable device, carrier, or medium. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes), optical discs (e.g., compact discs (CDs), digital versatile discs (DVDs), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROMs), cards, sticks, or key drives, etc.). Additionally, the various storage media described herein may represent one or more devices and / or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0164] The following section, in conjunction with Figures 2 and 3, introduces the terminology and related content involved in the embodiments of this application.

[0165] In some communication systems, terminal equipment can perform cell search based on the synchronization signal and PBCH block (SSB). The SSB can consist of two parts: the synchronization signal (SS) and the physical broadcast channel (PBCH).

[0166] The SS can include the primary synchronization signal (PSS) and the secondary synchronization signal (SSS). Therefore, the SSB can also be considered to consist of three parts. The PSS and SSS together can be used to obtain the cell ID, downlink timing (finding the reference point for downlink transmission, such as frame boundaries), and obtain necessary system information (e.g., the time-frequency resource location of the physical downlink control channel (PDCCH) corresponding to the received system information block 1 (SIB1), the offset value Kssb of the frequency domain resource grid of the SSB relative to the common resource block (CRB), etc.).

[0167] In addition, the PBCH can carry the demodulation reference signal (DMRS). Alternatively, the DMRS can also be carried as a separate component in the SSB.

[0168] For example, in NR, SSB can perform the following functions:

[0169] 1) Cell synchronization and acquisition of master information block (MIB);

[0170] 2) Base station side wide beam training.

[0171] The following is a detailed introduction to the functions implemented by SSB.

[0172] 1) Cell synchronization and MIB acquisition:

[0173] PSS and SSS can carry the physical cell identifier (PCI), and terminal devices can obtain the PCI by detecting PSS and SSS.

[0174] For example, PSS and SSS can carry PCI in the following way:

[0175] in, Indicates the physical cell identifier. This represents the sequence used to generate the PSS. This indicates the sequence used to generate the SSS.

[0176] From the above formula, we can see the physical community identifier. Terminal equipment can determine the physical cell identifier by receiving the signal sequence (or sequence) of the PSS and the signal sequence of the SSS. The PSS signal sequence can be generated by the following formula: d PSS (n) = 1 - 2x(m)

[0177] 0≤n<127

[0178] Where, d PSS The signal sequence representing PSS, (Therefore, PSS can include 3 candidate sequences), x(i+7)=(x(i+4)+x(i))mod 2, [x(6),x(5),x(4),x(3),x(2),x(1),x(0)]=[1,1,1,0,1,1,0],

[0179] mod represents the modulo operation, where m and n are integers.

[0180] The signal sequence of SSS can be generated by the following formula: d SSS =(1-2x0((n+m0)mod 127))(1-2x1((n+m1)mod 127)) 0≤n<127

[0181] Where, d SSS The signal sequence representing SSS, (Therefore, SSS can include 336 candidate sequences), x(i+7)=(x0(i+4)+x0(i))mod 2, x(i+7)=(x1(i+1)+x1(i))mod 2, [x0(6),x0(5),x0(4),x0(3),x0(2),x0(1),x0(0)]=[0,0,0,0,0,0,1], [x1(6),x1(5),x1(4),x1(3),x1(2),x1(1),x1(0)]=[0,0,0,0,0,0,1],

[0182] mod represents the modulo operation, where m0, m1, and n are integers.

[0183] Meanwhile, the SSB can carry an SSB index, and each SSB index can correspond to a transmission location. By detecting the SSB index and the detection time, downlink timing synchronization can be completed.

[0184] The PBCH in the SSB can carry MIB information. To avoid or reduce the impact of interference on the received PBCH, the PBCH can be scrambled in two stages. The first stage of scrambling uses the system frame number to generate a scrambling sequence, while the second stage generates a scrambling sequence based on the SSB index. For the generation of the scrambling sequence used in the second stage: when the maximum number of SSBs is 4, the scrambling sequence can be generated based on the lowest two bits of the SSB index; when the maximum number of SSBs is 8 or 64, the scrambling sequence can be generated based on the lowest three bits of the SSB index.

[0185] 2) Base station side wide beam training:

[0186] A single SSB pattern can contain multiple SSB indices. Different SSB indices correspond to different base station transmission beams. Terminal devices can select the optimal SSB index by detecting SSBs to complete wide-beam training. The functions of a base station's wide beam can include: terminal devices receiving SIB1 or paging messages transmitted with the same wide beam at the location corresponding to the SSB index, thereby improving the coverage of SIB1 or paging; terminal devices transmitting Physical Random Access Channel (PRACH) messages at the location corresponding to the SSB index, and the base station can use the same wide beam to receive PRACH messages, ensuring a high success rate for PRACH reception; after the terminal device completes initial access and establishes a radio resource control (RRC) connection, the base station can perform fine-beam training based on this wide beam, i.e., training is only performed on fine beams within the wide beam range, thereby reducing the overhead of fine-beam training.

[0187] Figure 2 shows the time-frequency resource structure of an SSB in one embodiment. As shown in Figure 2, an SSB can contain four consecutive orthogonal frequency division multiplexing (OFDM) symbols in the time domain and occupy 20 resource blocks (RBs) in the frequency domain, which is equivalent to 240 subcarriers (SCs).

[0188] The position of the SSB in the frequency domain can be defined by the synchronization raster; the position of the SSB in the temporal domain can be defined by the SSB pattern, where an SSB pattern can correspond to a set of consecutive SSB positions in the temporal domain within a half-frame.

[0189] Currently, the 3rd generation partnership project (3GPP) defines five SSB patterns for unshared spectrum, each with its applicable subcarrier spacing (SCS). For example, as shown in Figure 3, cases A, B, and C correspond to different SSB pattern configurations.

[0190] Taking Case A as an example, Case A can only support an SCS of 15 kHz. The starting orthogonal frequency division multiplexing (OFDM) symbol index for SSB transmission resources in a half-frame can be {2, 8} + 14n, where n is an integer representing the nth SSB. When the service frequency is less than or equal to 3 GHz, n = 0, 1, meaning the SSB beam is transmitted in the first two time slots of the half-frame, and the starting OFDM symbol corresponding to the SSB beam in each time slot is the 3rd or 9th. There are a total of 4 SSB beam transmission resources. When the service frequency is greater than 3 GHz, n = 0, 1, 2, 3, meaning the SSB beam is transmitted in the first four time slots of the half-frame, and the starting OFDM symbol corresponding to the SSB beam in each time slot is the 3rd or 9th, resulting in a total of 8 SSB beam transmission resources.

[0191] Furthermore, a specific SSB index can be mapped one-to-one with a fixed transmission position in the SSB pattern. Simultaneously, the SSB can carry half-frame indication information and the system frame number (SFN).

[0192] Accordingly, after receiving the SSB:

[0193] Terminal devices can determine the specific frame based on the SFN number in the MIB;

[0194] Terminal devices can determine the specific half-frame based on the half-frame bit indication in the MIB;

[0195] Terminal equipment can determine the distribution of time slots or OFDM symbols in a half-frame based on the SSB index and a predefined transmission pattern.

[0196] Figure 3 illustrates the SSB transmission patterns under different subcarrier spacings and frequency points. It should be noted that these patterns can be predefined by the protocol. Also, as shown in Figure 3, different patterns, SCSs, and transmission frequency points can have a one-to-one mapping relationship. When the terminal device detects an SSB, it can determine the time slot or OFDM symbol-level grid arrangement based on the frequency point of its SCS and the index information in the MIB.

[0197] After detecting an SSB, the terminal device can further receive SIBs (System Information), such as SIB1. SIB1 contains the configuration information necessary for the terminal device to access the cell. The system information is carried on downlink control information (DCI) scrambled by SI-RNTI, scheduling the physical downlink share channel (PDSCH). Simultaneously, the PDSCH transmission also undergoes scrambling, as shown below. The PDSCH payload is b(0),…,b(M-1), and the PDSCH can be scrambled using the following formula: b(i)=(b(i)+c(i))mod 2

[0198] Where c(i) represents the scrambling sequence of PDSCH, and c(i) can be a sequence initialization factor c init The pseudo-random sequence obtained after initialization. c rnti This is the value of the radio network temporary identity (RNTI) associated with the PDSCH (i.e., the system information radio network temporary identity (SI-RNTI)). M is the physical cell identifier, where M and i are integers.

[0199] Simultaneously, while transmitting the PDSCH (e.g., the PDSCH scrambled by SI-RNTI and scheduled by DCI), the DMRS of the PDSCH can also be transmitted. The signal sequence of the demodulated reference signal is generated by the following formula:

[0200] Where r(n) represents the DMRS signal sequence, c dmrs(i) represents the sequence initialization factor c. init-dmrs The pseudo-random sequence obtained after initialization. The number of symbols included in a time slot. The subcarrier spacing is 15*2 μ In the case of kHz, the index of the time slot within the signal frame, where l is the index of the symbol carrying DMRS within the time slot. Here, n and i are the physical cell identifiers, and n and i are integers.

[0201] With the development of communication technology, downlink common signals (such as SSB, system information (such as system information block 1 (SIB1), system information block 2 (SIB2), paging messages, etc.) in some communication systems can be transmitted using frequency division (or frequency division multiplexing) to reduce the time domain proportion of downlink common signals, thereby reducing system power consumption (such as saving power consumption of network equipment and / or terminal equipment).

[0202] For example, when transmitting SSBs in frequency division multiplexing (FDM), the SSBs can be arranged in the order of time domain first and then frequency domain based on their indexes. As shown in Figure 4, SSB#0, SSB#1, SSB#2, and SSB#3 can be arranged sequentially in the time domain based on their indexes, and then SSB#4, SSB#5, SSB#6, and SSB#7 can be arranged sequentially in the time domain. This transforms the 8 time-division multiplexing of SSBs into a 2-SSB frequency-division multiplexing method, thereby reducing the total time domain overhead of the SSBs to half of the original.

[0203] However, since the information or signal sequence carried by the common signal is exactly the same, the downlink peak to average power ratio (PAPR) increases. The increase in PAPR leads to a larger power back-off value required during downlink transmission, which reduces the efficiency of the power amplifier and causes unnecessary energy loss.

[0204] For example, during SSB frequency division transmission, the signal sequences of PSS and SSS are generated by the physical cell identifier (see the formula for generating the signal sequence of PSS and the formula for generating the signal sequence of SSS in the aforementioned embodiments). This results in the PSS and SSS signal sequences in the frequency division multiplexed SSB being completely identical, causing the downlink PAPR to increase.

[0205] For example, when the system information is transmitted in frequency division, the payload of the frequency division multiplexed system information is the same as the signal sequence of the frequency division multiplexed system information DMRS, and both are used to generate scrambling codes using SI-RNTI (see the formula for generating PDSCH and the formula for generating the signal sequence of DMRS in the aforementioned embodiments). This will result in the frequency division multiplexed system information block and its DMRS being completely identical, thereby improving the downlink PAPR.

[0206] To reduce the time domain proportion of the downlink common signal and reduce system power consumption, a wide and narrow beam scanning method can be used to transmit the SSB. For example, a wide beam can be used to transmit the PSS and / or SSS, and a narrow beam can be used to transmit the PBCH, so that an SSB includes one PSS and / or one SSS, as well as multiple frequency division multiplexed PBCHs.

[0207] However, during PBCH frequency division transmission, since the PBCH payload is completely identical and the PBCH scrambling code is generated based on the SSB index, the scrambling code sequences of multiple frequency division multiplexed PBCHs within the same SSB will be completely identical, thus improving the downlink PAPR.

[0208] To address one or more of the aforementioned technical problems, this application proposes a communication method and a communication device that can avoid or reduce downlink PAPR increases, thereby reducing system energy consumption. The communication method in the embodiments of this application is illustrated in detail below with reference to Figures 5 to 7.

[0209] In some embodiments, SSB can be transmitted using frequency division multiplexing (FDM) to reduce system power consumption. The following detailed examples of an embodiment of SSB FDM transmission are illustrated with reference to Figure 5.

[0210] In the embodiments of this application, the executing entity can be a terminal device, a network device, or a device within the terminal device or network device (e.g., a chip, a chip system, a circuit, or a processor). It can also be a device compatible with the terminal device or network device, or a logic module or software capable of implementing all or part of the terminal device or network device. The following description uses a terminal device or network device as the executing entity. When the executing entity is a device within the terminal device or network device, receiving / transmitting can be understood as input / output, meaning that the device communicates with other modules or components of the terminal device or network device. Furthermore, the processing performed by a single executing entity can be divided among multiple executing entities, which can be logically and / or physically separated. For example, the processing performed by a network device can be divided among at least one of CU, DU, RU, etc.

[0211] Figure 5 is a schematic flowchart of a communication method provided in an embodiment of this application. The method 500 shown in Figure 5 may include steps S510, S520 and S530, as follows:

[0212] S510, the network device generates the first SSB.

[0213] The first SSB can be one of N SSBs, where N is a positive integer. Optionally, each of the N SSBs can include a PSS and an SSS.

[0214] N SSBs can have the same time domain resources, and N SSBs can be carried on N non-overlapping frequency domain resources. In other words, N SSBs can be transmitted in the same time domain resource using frequency division.

[0215] In S520, the network device sends the first SSB. Correspondingly, the terminal device receives the first SSB.

[0216] S530, the terminal device synchronizes according to the first SSB.

[0217] In some embodiments, N SSBs may satisfy one or more of the following conditions:

[0218] Case 1: The signal sequences of the PSS are different in at least two of the N SSBs;

[0219] Scenario 2: The signal sequences of the SSSs within at least two of the N SSBs are different;

[0220] Case 3: At least two of the N SSBs have different scrambling sequences for their SSS; or,

[0221] Case 4: At least two of the N SSBs have different scrambling sequences for their PSS.

[0222] Optionally, at least two SSBs can be N SSBs.

[0223] This can avoid or reduce the increase in the downlink peak-to-average power ratio (PAPR), and can avoid or reduce the reduction in the efficiency of the power amplifier, thereby reducing the energy loss of the system.

[0224] In some embodiments, in Case 1 above, among the N SSBs, the PSS within at least one SSB can be generated based on a first partial cell index and a first offset value. In some implementations, the first offset values ​​corresponding to the PSSs within at least two SSBs can be different. In the embodiments of this application, A is generated based on B, which can be replaced by: A being related to B. For example, the PSS within at least one SSB being generated based on a first partial cell index and a first offset value can be replaced by: the PSS within at least one SSB being related to a first partial cell index and a first offset value. Similar cases below can be replaced with the examples above, and will not be repeated here.

[0225] The first part, the cell index, can be used to generate physical cell identifiers. For example, Indicates the physical cell identifier. This represents the first part of the cell index (which can be used to generate the PSS sequence). This refers to the second part of the cell index (which can be used to generate the SSS sequence) as described in subsequent embodiments.

[0226] For example, the signal sequence of PSS can be generated by the following formula: d PSS (n) = 1 - 2x(m) 0≤n<127

[0227] Where, d PSS The signal sequence representing PSS, n offset,1 Representing the first offset value, x(i+7)=(x(i+4)+x(i))mod 2, [x(6),x(5),x(4),x(3),x(2),x(1),x(0)]=[1,1,1,0,1,1,0],

[0228] mod represents the modulo operation, where m and n are integers.

[0229] Optionally, n offset，1 The range of values ​​can be For example, n offset,1 The value range can be [0, 1, 2], meaning that the PSS within each of the N SSBs can be generated based on the first part of the cell index and the first offset value; or, n offset,1 The range of values ​​can be For example, n offset,1The value range can be [1,2], meaning that the PSS of some SSBs out of N SSBs (e.g., N-1 SSBs out of N SSBs) can be generated based on the first part of the cell index and the first offset value, while the PSS of other SSBs (e.g., one SSB out of N SSBs other than the aforementioned N-1 SSBs) is still generated only based on the first part of the cell index (equivalent to n offset,1 =0).

[0230] It should be noted that the above formula The values ​​43, 3, and 127 can be replaced with other values, as long as the following relationship is satisfied:

[0231] In the embodiments of this application, the PSS within at least one SSB is generated based on the first part of the cell index and the first offset value. The first offset values ​​corresponding to the PSS within at least two SSBs are different. This makes the signal sequences of the PSS within at least two SSBs different, thereby avoiding or reducing downlink PAPR increase and reducing system energy loss.

[0232] In some embodiments, the first offset value corresponding to the PSS within at least one SSB can be determined based on the offset of the frequency domain position of at least one SSB relative to the first reference frequency domain position. In the embodiments of this application, A is determined based on B, which can be replaced by: A being related to B. For example, the first offset value corresponding to the PSS within at least one SSB can be determined based on the offset of the frequency domain position of at least one SSB relative to the first reference frequency domain position, which can be replaced by: the first offset value corresponding to the PSS within at least one SSB can be related to the offset of the frequency domain position of at least one SSB relative to the first reference frequency domain position. Similar cases below can be replaced with the above examples and will not be repeated.

[0233] Optionally, the first reference frequency domain location can be a predefined (as specified by the communication protocol) or preconfigured (as configured by the user) frequency.

[0234] Optionally, the frequency of the first reference frequency domain location can be equal to the center frequency of the second SSB. Optionally, the second SSB can be one of N SSBs.

[0235] Optionally, the second SSB can be an SSB with a first offset value equal to 0, or the second SSB can be an SSB that generates a PSS based solely on the first partial cell index. In this case, at the pre-configured or pre-defined first reference frequency domain location, the UE only needs to blindly detect the second SSB, reducing the complexity of the UE's blind SSB detection.

[0236] For example, assuming there are 3 SSBs (i.e., N=3) in the same time domain resource, the indices (or numbers) of these 3 SSBs are SSB#0, SSB#1, and SSB#2 in order of increasing frequency in the frequency domain resource. The first reference frequency domain position can be preset or the communication protocol can specify that the center frequency of SSB#0 is the center frequency of SSB#0. That is, the center frequency of the SSB with the smallest index among these 3 SSBs is the first reference frequency domain position.

[0237] At this point, the offset of the center frequency of SSB#1 relative to the first reference frequency domain position (i.e., the center frequency of SSB#0) is X Hz, and the offset of the center frequency of SSB#2 relative to the first reference frequency domain position is 2*X Hz. Therefore, the first offset value corresponding to the PSS within SSB#1 can be 1, and the first offset value corresponding to the PSS within SSB#1 can be 2. Here, X can be a preset value.

[0238] In some embodiments, the first offset value corresponding to the PSS within at least one SSB is determined based on the index of the at least one SSB.

[0239] For example, a terminal device detects N SSBs within time unit n and N SSBs within time unit m, where m is greater than n. The N SSBs in time unit n are numbered from 0 to N-1 according to the frequency of the frequency domain resources in ascending order, and the N SSBs in time unit m are numbered from N to 2N-1 according to the frequency of the frequency domain resources in ascending order. In this case, the first offset value corresponding to the PSS within the SSB in time units n and m can be: SSB index mod N.

[0240] In some embodiments, in Case 2 above, among the N SSBs, the SSS within at least one SSB can be generated based on the second partial cell index and the second offset value. In some implementations, the second offset values ​​corresponding to the SSSs within at least two SSBs can be different.

[0241] The second part, the cell index, can be used to generate physical cell identifiers.

[0242] For example, the signal sequence of SSS can be generated by the following formula: d SSS =(1-2x0((n+m0)mod 127))(1-2x1((n+m1)mod 127)) 0≤n<127

[0243] Where, d SSS The signal sequence representing SSS, n offset,2Let x(i+7) = (x0(i+4) + x0(i)) mod 2, x(i+7) = (x1(i+1) + x1(i)) mod 2, [x0(6),x0(5),x0(4),x0(3),x0(2),x0(1),x0(0)] = [0,0,0,0,0,0,1], [x1(6),x1(5),x1(4),x1(3),x1(2),x1(1),x1(0)] = [0,0,0,0,0,0,1],

[0244] mod represents the modulo operation, where m0, m1, and n are integers.

[0245] Optionally, n offset,2 The range of values ​​can be For example, n offset,2 The value range can be [0, 1, 2], meaning that the SSS within each of the N SSBs can be generated based on the second part of the cell index and the second offset value; or, n offset,2 The range of values ​​can be For example, n offset,2 The value range can be [1,2], meaning that the SSS within some SSBs out of N SSBs (e.g., N-1 SSBs out of N SSBs) can be generated based on the second part of the cell index and the second offset value, while the SSS within other SSBs (e.g., one SSB out of N SSBs other than the aforementioned N-1 SSBs) is still generated only based on the second part of the cell index (equivalent to n offset,2 =0).

[0246] It should be noted that the above formula It can also be replaced with

[0247] In this embodiment, at least one SSS within an SSB is generated based on the second cell index and the second offset value. The second offset values ​​corresponding to the SSSs within at least two SSBs are different. This makes the signal sequences of the SSSs within at least two SSBs different, thereby avoiding or reducing downlink PAPR increases and reducing system energy consumption.

[0248] In some embodiments, the second offset value corresponding to the SSS within at least one SSB is determined based on the offset of the frequency domain position of the at least one SSB relative to the second reference frequency domain position.

[0249] Optionally, the second reference frequency domain location can be a predefined (as specified by the communication protocol) or preconfigured (as configured by the user) frequency.

[0250] Optionally, the frequency of the second reference frequency domain location can be equal to the center frequency of the third SSB. Optionally, the third SSB can be one of N SSBs.

[0251] Optionally, the third SSB can be an SSB with a second offset value equal to 0, or the third SSB can be an SSB that generates an SSB solely based on the second part of the cell index. In this case, at the pre-configured or pre-defined second reference frequency domain location, the UE only needs to blindly detect the third SSB, reducing the complexity of the UE's blind SSB detection.

[0252] Optionally, the second reference frequency domain position and the first reference frequency domain position can be the same frequency domain position.

[0253] For a detailed description of the second reference frequency domain position and the second offset value, please refer to the embodiment of the first reference frequency domain position and the first offset value in Case 1 above, which will not be repeated here.

[0254] In some embodiments, the second offset value corresponding to the SSS within at least one SSB is determined based on the index of the at least one SSB.

[0255] For a detailed description of determining the second offset value based on the index of at least one SSB, please refer to the embodiment regarding the first offset value in Case 1 above, which will not be repeated here.

[0256] In some embodiments, in Case 3 above, among the N SSBs, the SSS within at least one SSB can be generated based on the second part of the cell index, the scrambling sequence of the SSS within at least one SSB can be generated based on the third offset value, and the third offset values ​​corresponding to the scrambling sequences of the SSS within at least two SSBs can be different.

[0257] For example, if the signal sequence of SSS is d1(0),…,d1(M-1), SSS can be scrambled using the following formula: d1(i)=(d1(i)+c1(i))mod 2

[0258] Where c1(i) represents the scrambling sequence of SSS, and c1(i) can be derived from c init,1 The pseudo-random sequence obtained after initialization, c init,1 (This can be called the sequence initialization factor) can be equal to the third offset value, or, c init,1 It can be the result of operations performed on the third offset value and other values ​​(e.g., c). init,1 = Third offset value + physical cell identifier ), where M and i are integers.

[0259] In this embodiment, the scrambling sequence of the SSS within at least one SSB is generated based on a third offset value. The third offset values ​​corresponding to the scrambling sequences of the SSS within at least two SSBs are different. This makes the scrambling sequences corresponding to the SSS within at least two SSBs different, thereby avoiding or reducing downlink PAPR increases and reducing system energy consumption.

[0260] In some embodiments, the third offset value corresponding to the SSS within at least one SSB can be determined based on the offset of the frequency domain position of at least one SSB relative to the third reference frequency domain position.

[0261] Optionally, the third reference frequency domain location can be a predefined (as specified by the communication protocol) or preconfigured (as configured by the user) frequency.

[0262] Optionally, the frequency of the third reference frequency domain location can be equal to the center frequency of the fourth SSB. Optionally, the fourth SSB can be one of N SSBs.

[0263] Optionally, the fourth SSB can be an SSB with a third offset value equal to 0, or the fourth SSB can be an SSB that generates an SSS solely based on the second part of the cell index (i.e., an SSS without scrambling a scrambling sequence, or an SSS with a scrambling sequence of 0). In this case, at the pre-configured or pre-defined third reference frequency domain location, the UE only needs to blindly detect the fourth SSB, reducing the complexity of the UE's blind SSB detection.

[0264] Optionally, the third reference frequency domain position and the first reference frequency domain position can be the same frequency domain position. Optionally, the third reference frequency domain position and the second reference frequency domain position can be the same frequency domain position.

[0265] For example, assuming there are 3 SSBs (i.e., N=3) in the same time domain resource, the indices (or numbers) of these 3 SSBs are SSB#0, SSB#1, and SSB#2 in order of increasing frequency in the frequency domain resource. The third reference frequency domain position can be preset or the communication protocol can specify that the center frequency of SSB#0 is the center frequency of SSB#0. That is, the center frequency of the SSB with the smallest index among these 3 SSBs is the third reference frequency domain position.

[0266] At this time, the offset of the center frequency of SSB#1 relative to the third reference frequency domain position (i.e., the center frequency of SSB#0) is X Hz, and the offset of the center frequency of SSB#2 relative to the third reference frequency domain position is 2*X Hz, where X can be a preset value.

[0267] In some embodiments, the third offset value corresponding to the SSS within at least one SSB can be determined based on the index of at least one SSB. In other words, the third offset value can be determined based on the absolute index of at least one SSB.

[0268] For example, assuming there are 3 SSBs (i.e., N=3) within the same time domain resource, and the indices (or numbers) of these 3 SSBs are SSB#3, SSB#4, and SSB#5 in ascending order of frequency in the frequency domain resource, then the third offset value corresponding to these 3 SSBs can be: the absolute index of the SSB mod N, that is, the third offset value corresponding to SSB#3 is 3 mod 3 = 0, the third offset value corresponding to SSB#4 is 4 mod 3 = 1, and the third offset value corresponding to SSB#5 is 5 mod 3 = 2.

[0269] In some embodiments, the third offset value corresponding to the SSS within at least one SSB can be determined based on the index of the at least one SSB among N SSBs. In other words, the third offset value can be determined based on the relative index of the at least one SSB among N SSBs.

[0270] For example, suppose there are 3 SSBs (i.e., N=3) within the same time domain resource, and the indices (or numbers) of these 3 SSBs are SSB#3, SSB#4, and SSB#5 respectively. According to the frequency domain resource in ascending order of frequency, the relative index of SSB#3 among these 3 SSBs is 1, the relative index of SSB#4 among these 3 SSBs is 2, and the relative index of SSB#5 among these 3 SSBs is 3. Then the third offset value corresponding to these 3 SSBs can be: SSB relative index mod N, that is, the third offset value corresponding to SSB#3 is 1 mod 3 = 1, the third offset value corresponding to SSB#4 is 2 mod 3 = 2, and the third offset value corresponding to SSB#5 is 3 mod 3 = 0.

[0271] In some embodiments, in case four above, among the N SSBs, the PSS within at least one SSB can be generated based on the first partial cell index, and the scrambling sequence of the PSS within at least one SSB can be generated based on the fourth offset value. In some embodiments, the fourth offset values ​​corresponding to the scrambling sequences of the PSS within at least two SSBs can be different.

[0272] For example, if the signal sequence of PSS is d2(0),…,d2(M-1), PSS can be scrambled using the following formula: d2(i)=(d2(i)+c2(i))mod 2

[0273] Where c2(i) represents the scrambling sequence of PSS, and c2(i) can be derived from c init，2 The pseudo-random sequence obtained after initialization, cinit,2 (This can be called the sequence initialization factor) can be equal to the fourth offset value, or, c init2 It can be the result of operations on the fourth offset value and other values ​​(e.g., c). init,2 = Fourth offset value + physical cell identifier ), where M and i are integers.

[0274] In some embodiments, the fourth offset value corresponding to the PSS within at least one SSB may be determined based on the offset of the frequency domain position of at least one SSB relative to the fourth reference frequency domain position.

[0275] Optionally, the fourth reference frequency domain location can be a predefined (as specified by the communication protocol) or preconfigured (as configured by the user) frequency.

[0276] Optionally, the frequency of the fourth reference frequency domain location can be equal to the center frequency of the fifth SSB. Optionally, the fifth SSB can be one of N SSBs.

[0277] Optionally, the fifth SSB can be an SSB with a fourth offset value equal to 0, or the fifth SSB can be an SSB that generates a PSS based solely on the first part of the cell index (i.e., a PSS without scrambling a scrambling sequence, or a PSS with a scrambling sequence of 0). In this case, at the pre-configured or pre-defined fourth reference frequency domain location, the UE only needs to blindly detect the fifth SSB, reducing the complexity of the UE's blind SSB detection.

[0278] Optionally, the fourth reference frequency domain position and the first reference frequency domain position can be the same frequency domain position. Optionally, the fourth reference frequency domain position and the second reference frequency domain position can be the same frequency domain position. Optionally, the fourth reference frequency domain position and the third reference frequency domain position can be the same frequency domain position.

[0279] For a detailed description of the fourth reference frequency domain position and the fourth offset value, please refer to the embodiment of the third reference frequency domain position and the third offset value in Case 3 above, which will not be repeated here.

[0280] In some embodiments, the fourth offset value corresponding to the PSS within at least one SSB can be determined based on the index of at least one SSB. In other words, the fourth offset value can be determined based on the absolute index of at least one SSB.

[0281] For a detailed description of determining the fourth offset value based on the index of at least one SSB, please refer to the embodiment regarding the third offset value in Case 1 above, which will not be repeated here.

[0282] In some embodiments, the fourth offset value corresponding to the PSS within at least one SSB can be determined based on the index of the at least one SSB among N SSBs. In other words, the fourth offset value can be determined based on the relative index of the at least one SSB among N SSBs.

[0283] For a detailed description of determining the fourth offset value based on the index of at least one SSB in the N SSBs, please refer to the embodiment regarding the third offset value in Case 1 above, which will not be repeated here.

[0284] In some embodiments, the PBCH can be transmitted using frequency division multiplexing (FDM) to reduce system power consumption. The following detailed examples of an embodiment of PBCH FDM transmission are illustrated with reference to Figure 6.

[0285] Figure 6 is a schematic flowchart of a communication method provided in an embodiment of this application. The method 600 shown in Figure 6 may include steps S610, S620 and S630, as follows:

[0286] S610, the network device generates the first SSB.

[0287] The first SSB may include a set of SSs and M PBCHs, where the M PBCHs can be carried on M non-overlapping frequency domain resources, and M is an integer greater than 1. The PBCHs included in the first SSB can also be replaced with other signals or channels; for example, the first SSB may include a set of SSs and M broadcast signals.

[0288] In S620, the network device sends the first SSB. Correspondingly, the terminal device receives the first SSB.

[0289] S630, the terminal device synchronizes according to the first SSB.

[0290] In some embodiments, at least two of the M PBCHs have different scrambling sequences.

[0291] For example, if the loads of the PBCH are d3(0),…,d3(M-1), the PBCH can be scrambled using the following formula: d3(i)=(d3(i)+c3(i+vM))mod 2

[0292] Where c3(i+vM) represents the scrambling sequence of PBCH, v represents the value of the lower log2(M) bits including the PBCH index, and M and i are integers.

[0293] In the embodiments of this application, M PBCHs are carried on M non-overlapping frequency domain resources, and at least two of the M PBCHs have different scrambling sequences. In this way, downlink PAPR can be avoided or reduced, the efficiency of the power amplifier can be avoided or reduced, and the energy loss of the system can be reduced.

[0294] In some embodiments, the scrambling sequence of at least one PBCH among the M PBCHs can be determined based on the index of the at least one PBCH; in other words, the scrambling sequence of at least one PBCH can be determined based on the absolute index of the at least one PBCH.

[0295] For example, assuming there are 3 PBCHs (i.e., M=3) in the same time domain resource, and the indices (or numbers) of these 3 PBCHs are PBCH#3, PBCH#4, and PBCH#5 in order of frequency of the frequency domain resource from smallest to largest, then PBCH#3, PBCH#4, and PBCH#5 can be considered as the absolute indices of these 3 PBCHs.

[0296] Alternatively, the scrambling sequence of at least one PBCH among the M PBCHs can be determined based on the index of the at least one PBCH among the M PBCHs; in other words, the scrambling sequence of at least one PBCH can be determined based on the relative index of the at least one PBCH among the M PBCHs.

[0297] For example, assuming there are 3 PBCHs (i.e., M=3) in the same time domain resource, and the indices (or numbers) of these 3 PBCHs are PBCH#3, PBCH#4, and PBCH#5 in order of increasing frequency in the frequency domain resource, then the relative index of PBCH#3 in these 3 PBCHs is 1, the relative index of PBCH#4 in these 3 PBCHs is 2, and the relative index of PBCH#5 in these 3 PBCHs is 3.

[0298] In the embodiments of this application, the scrambling sequence of at least one PBCH is determined based on the index of at least one PBCH, or the scrambling sequence of at least one PBCH is determined based on the index of at least one PBCH in M ​​PBCHs. This helps to make the scrambling sequences of at least two PBCHs in M ​​PBCHs different, thereby helping to avoid or reduce downlink PAPR increase and reduce system energy loss.

[0299] In some embodiments, the first SSB may further include M DMRSs, each corresponding one-to-one with one of the M PBCHs. At least two of the M DMRSs have different signal sequences and / or different scrambling sequences, thereby avoiding or reducing PAPR increases in the DMRSs and reducing system energy loss. Simultaneously, the signal sequences and / or scrambling sequences of the DMRSs carry the PBCH index, thus eliminating the need for the PBCHs to carry their own indexes. This allows the M PBCHs to have identical information, enabling PBCH merging reception during reception and improving reception performance.

[0300] In one implementation, the signal sequence of at least one of the M DMRSs can be determined based on the index of at least one PBCH corresponding to the at least one DMRS (in this way, the DMRS can be scrambled without using a scrambling code sequence).

[0301] At least one DMRS signal sequence can be generated according to the following formula, or at least one DMRS signal sequence can satisfy the following formula:

[0302] Where, c(t)=(x1(t+N) c )+x2(t+N c mod2, N c x1() can be a preset value (such as a fixed value defined in a communication protocol), x2() can be a pseudo-random sequence (such as a predefined m-sequence), and x2() can be generated by the following formula, or x2() can satisfy the following formula:

[0303] Where a can be 30, c init,DMRS As the sequence initialization factor, c init,DMRS It can be For the index of at least one PBCH corresponding to the at least one DMRS, This is the physical identifier for the residential community.

[0304] In another implementation, among the M DMRS, the signal sequence of at least one DMRS can be determined according to the index of the first SSB, and the scrambling sequence of the at least one DMRS can be determined according to the index of at least one PBCH corresponding to the at least one DMRS.

[0305] In another implementation, among the M DMRS, the signal sequence of at least one DMRS can be determined according to the index of the first SSB, and the scrambling sequence of the DMRS corresponding to the at least one PBCH can be determined according to the index of the at least one PBCH corresponding to the at least one DMRS in the N PBCHs.

[0306] At least one DMRS signal sequence can be generated according to the following formula, or at least one DMRS signal sequence can satisfy the following formula:

[0307] Where, c(t)=(x1(t+N) c )+x2(t+N c mod2, N c x1() can be a preset value (such as a fixed value defined in a communication protocol), x2() can be a pseudo-random sequence (such as a predefined m-sequence), and x2() can be generated by the following formula, or x2() can satisfy the following formula:

[0308] Where a can be 30, c init,DMRS As the sequence initialization factor, c init,DMRS It can be For SSB index, This is the physical identifier for the residential community.

[0309] At least one reference signal sequence for DMRS can be scrambled as follows: r(i) = (r(i) + c(i)) mod 2

[0310] Where r(i) = r(0), ..., r(M-1), c(i) can be the sequence initialization factor c init The initial pseudo-random sequence. init ′ can be an index of at least one PBCH corresponding to the at least one DMRS, or, c init ′ can be the result of a combination operation of the index of at least one PBCH corresponding to the at least one DMRS with other values ​​(e.g., c init = Index of at least one PBCH corresponding to at least one DMRS + physical cell identifier ), or, c init ′ can be the index of at least one PBCH corresponding to the at least one DMRS in N PBCHs, or, c init ′ can be the result of a combination operation of the index of at least one PBCH corresponding to at least one DMRS in N PBCHs and other values ​​(e.g., cinit = Index of at least one PBCH corresponding to at least one DMRS in N PBCHs + Physical Cell Identifier ).

[0311] Optionally, the index of at least one PBCH can be determined based on one or more of the following: the index of the first SSB and the frequency domain resources of the DMRS corresponding to at least one PBCH, the index of the first SSB and the frequency domain resources of at least one PBCH, the signal sequence of the DMRS corresponding to at least one PBCH, or the scrambling sequence of the DMRS corresponding to at least one PBCH. That is, after receiving the SSB, the UE needs to receive the index of the PBCH in the SSB, and the above description can be mainly used by the UE to determine the index of the PBCH.

[0312] For example, M DMRSs are carried on frequency domain resource 0, frequency domain resource 1, ..., frequency domain resource M-1 respectively. The index of the first SSB is i. The index of the first SSB can be carried by the information sequence of the DMRS. Then the index of the PBCH corresponding to the j-th DMRS is i*M+j, where i and j are integers, and j is greater than or equal to 0 and less than or equal to M-1.

[0313] For example, M PBCHs are carried on frequency domain resources 0, 1, ..., M-1 respectively. The index of the first SSB is i. The index of the first SSB can be carried by the information sequence of DMRS. Then the index of the PBCH carried on frequency domain resource j is i*M+j, where i and j are integers, and j is greater than or equal to 0 and less than or equal to M-1.

[0314] For example, if the signal sequences of M DMRS are generated based on the indices of PBCH, then the PBCH index corresponding to the j-th DMRS is the index carried in the signal sequence of the j-th DMRS.

[0315] For example, if the scrambling sequences of M DMRS are generated based on the indices of PBCH, then the PBCH index corresponding to the j-th DMRS is the index carried in the scrambling sequence of the j-th DMRS.

[0316] For example, the scrambling sequences of the M DMRS are generated based on the indices of the PBCHs in the M PBCHs. The index of the first SSB is i, and the index of the first SSB can be carried by the information sequence of the DMRS. Then, the index of the PBCH corresponding to the j-th DMRS is i*M+c. init ′, c init ′ is the sequence initialization factor of the j-th DMRS scrambling sequence.

[0317] Optionally, the index of at least one PBCH in the M PBCHs can be determined based on one or more of the following information:

[0318] Frequency domain resources of DMRS corresponding to at least one PBCH, or scrambling sequence of DMRS corresponding to at least one PBCH.

[0319] For example, if M PBCHs are carried on frequency domain resource 0, frequency domain resource 1, ..., frequency domain resource M-1 respectively, then the index of the PBCH carried on frequency domain resource j among the M PBCHs is j, where j is an integer, greater than or equal to 0, and less than or equal to M-1.

[0320] For example, if the scrambling sequences of M DMRS are generated based on the indices of PBCHs in the M PBCHs, then the index of the PBCH corresponding to the j-th DMRS in the M PBCHs is c. init ′, c init ′ is the sequence initialization factor of the j-th DMRS scrambling sequence.

[0321] In some embodiments, after receiving the first SSB, the terminal device can determine the index of the PBCH using the method described above.

[0322] In some embodiments, frequency division multiplexing (FDM) can be used to transmit system information in order to reduce system power consumption. The following detailed examples of an embodiment of FDM transmission of system information are illustrated with reference to Figure 7.

[0323] Figure 7 is a schematic flowchart of a communication method provided in an embodiment of this application. The method 700 shown in Figure 7 may include steps S710 and S720, as follows:

[0324] S710: The network device sends the first DCI. Correspondingly, the terminal device receives the first DCI.

[0325] The first DCI can be one of T DCIs. Each of the T DCIs can be used to schedule the terminal equipment to receive the common downlink shared channel, where T is an integer greater than 1.

[0326] Optionally, the common downlink shared channel can be used to carry system information (such as SIB1, SIB2, etc.) or paging messages. Optionally, the common downlink shared channel can be a common physical downlink share channel (PDSCH).

[0327] Optionally, the T DCIs can each correspond to a T SSB. The correspondence between DCI and SSB can be understood as follows: the T common downlink shared channels scheduled by the T DCIs are transmitted in the spatial beam direction of their respective T SSBs. In other words, the common downlink shared channel scheduled by each of the T DCIs has the same spatial coverage as the T SSBs corresponding to that DCI.

[0328] Optionally, the T DCIs can be located in the same time domain resource, and the T DCIs can be carried on T non-overlapping frequency domain resources. In other words, the T DCIs can be frequency-division transmitted within the same time domain resource.

[0329] For example, T DCIs can reside in one control resource set (CORESET), which can be located on a time-domain resource. This CORESET can also include T candidate PDCCHs, each carrying information for one of the T DCIs, and each carrying information on one of the T non-overlapping frequency-domain resources. Alternatively, the T DCIs can reside in T CORESETs, which can be located on the same time-domain resource. These T CORESETs can be carried on T non-overlapping frequency-domain resources (these T frequency-domain resources can be determined based on T SSBs; for example, the frequency-domain resources of the T SSBs are T frequency-domain resources respectively, or the starting frequency of the t-th frequency-domain resource among the T frequency-domain resources is equal to the starting frequency of the t-th SSB's frequency-domain resource plus a frequency offset).

[0330] In the case of T DCI frequency-division transmission, the T common downlink shared channels scheduled by the T DCIs can also be frequency-division transmitted. Optionally, at least two of the T common downlink shared channels scheduled by the T DCIs can be located within the same time domain resource, and at least two of the T common downlink shared channels can be carried on non-overlapping frequency domain resources. That is, the T common downlink shared channels can be frequency-division transmitted within the same time domain resource.

[0331] For example, as shown in Figure 8, common PDSCH#0 and common PDSCH#1 can reside within the same time-domain resource, and the DMRS corresponding to common PDSCH#0 and common PDSCH#1 can be carried on two non-overlapping frequency-domain resources respectively. Simultaneously, the DMRS corresponding to common PDSCH#0 and the DMRS corresponding to common PDSCH#1 can also reside within the same time-domain resource, and the DMRS corresponding to common PDSCH#0 and the DMRS corresponding to common PDSCH#1 can also be carried on two non-overlapping frequency-domain resources respectively.

[0332] Optionally, the information carried by the T common downlink shared channels can be the same. For example, the information carried by the T common downlink shared channels can all be the same SIB1 or the same SIB2, or the information carried by the T common downlink shared channels can all correspond to the same paging message.

[0333] S720, the network device transmits a first common downlink shared channel and a first DMRS corresponding to the first common downlink shared channel. Correspondingly, the terminal device receives the first common downlink shared channel and the first DMRS corresponding to the first common downlink shared channel.

[0334] The first common downlink shared channel can be one of T common downlink shared channels, the first DMRS can be one of T DMRS, and the T common downlink shared channels can correspond one-to-one with the T DMRS.

[0335] Among the T common downlink shared channels, at least two common downlink shared channels can be scrambled with different scrambling code sequences, and / or, at least two DMRSs among the T DMRSs can have different signal sequences.

[0336] At least two common downlink shared channels can be T common downlink shared channels.

[0337] At least two DMRS can be T DMRS.

[0338] In the embodiments of this application, T common downlink shared channels correspond one-to-one with T DMRS. At least two of the T common downlink shared channels are scrambled with different scrambling sequences, and / or at least two of the T DMRS have different signal sequences. In this way, the downlink PAPR can be avoided or reduced, the efficiency reduction of the power amplifier can be avoided or reduced, and the energy loss of the system can be reduced.

[0339] In some embodiments, the scrambling sequence of at least one of the T common downlink shared channels can be a sequence initialized by a first initialization factor, and the first initialization factor corresponding to at least one common downlink shared channel can be generated based on the offset value of the first initialization factor. Optionally, the offset values ​​of the first initialization factor corresponding to at least two of the T common downlink shared channels can be different.

[0340] For example, if the payload of a common downlink shared channel is d4(0),…,d4(M-1), the common downlink shared channel can be scrambled using the following formula: d4(i)=(d4(i)+c4(i))mod 2

[0341] Where c4(i) represents the scrambling sequence of the common downlink shared channel, cinit,3 Denotes the first initialization factor, c4(i), which can be derived from c. init,3 The pseudo-random sequence obtained after initialization n offset,3 c represents the offset value of the first initialization factor. rnti The value of RNTI associated with the common downlink shared channel. M is the physical cell identifier, where M and i are integers.

[0342] Optionally, when the common downlink shared channel is used to carry system information, the RNTI associated with the common downlink shared channel can be a system information radio network temporary identity (SI-RNTI); when the common downlink shared channel is used to carry paging messages, the RNTI associated with the common downlink shared channel can be a physical radio network temporary identity (P-RNTI).

[0343] In this embodiment, the first initialization factor corresponding to at least one of the T common downlink shared channels is generated based on the offset value of the first initialization factor. This helps to ensure that at least two common downlink shared channels are scrambled by different scrambling code sequences, thereby helping to avoid or reduce downlink PAPR increase and reduce system energy loss.

[0344] In some embodiments, the first initialization factor offset value corresponding to at least one of the T common downlink shared channels may be indicated by the DCI, or the first initialization factor offset value corresponding to at least one common downlink shared channel may be determined based on the index of the SSB corresponding to at least one common downlink shared channel.

[0345] For example, if the indices of the SSBs corresponding to the T common downlink shared channels are 0 to T-1, then the first initialization factor offset value corresponding to each of the T common downlink shared channels can be 0 to T-1.

[0346] In the embodiments of this application, the first initialization factor offset value corresponding to at least one common downlink shared channel is indicated by downlink control information, or the first initialization factor offset value corresponding to at least one common downlink shared channel is determined according to the index of the SSB corresponding to each common downlink shared channel. In this way, the first initialization factor offset value can be flexibly determined according to actual needs.

[0347] In some embodiments, the signal sequence of at least one DMRS among the T DMRSs can be a sequence obtained by initializing it with a second initialization factor, and the second initialization factor corresponding to at least one DMRS can be generated based on the offset value of the second initialization factor. Optionally, the offset values ​​of the second initialization factor corresponding to at least two DMRSs among the T DMRSs can be different.

[0348] For example, the DMRS signal sequence is generated using the following formula:

[0349] Where r(n) represents the DMRS signal sequence, c init,4 c5(i) represents the second initialization factor, and c5(i) represents the sequence initialization factor c. init,4 The pseudo-random sequence obtained after initialization The number of symbols included in a time slot. The subcarrier spacing is 15*2 μ In the case of kHz, the index of the time slot within the signal frame, where l is the index of the symbol carrying DMRS within the time slot. For physical cell identifiers, n offset,4 This represents the offset value of the second initialization factor, where n and i are integers.

[0350] In this embodiment, the second initialization factor corresponding to at least one of the T DMRSs is generated based on the offset value of the second initialization factor. This helps to make the signal sequences of at least two DMRSs in the T DMRSs different, thereby helping to avoid or reduce downlink PAPR increase and reduce system energy loss.

[0351] In some embodiments, the second initialization factor offset value corresponding to at least one of the T DMRSs may be indicated by downlink control information, or the second initialization factor offset value corresponding to at least one DMRS may be determined based on the index of the SSB corresponding to the at least one DMRS.

[0352] For example, if the indices of the SSBs corresponding to the T common downlink shared channels are 0 to T-1, then the second initialization factor offset value (corresponding to the DMRS) for each of the T common downlink shared channels can be 0 to T-1.

[0353] In the embodiments of this application, the second initialization factor offset value corresponding to at least one DMRS is indicated by downlink control information, or the second initialization factor offset value corresponding to at least one DMRS is determined according to the index of the SSB corresponding to at least one DMRS. In this way, the second initialization factor offset value can be flexibly determined according to actual needs.

[0354] The method embodiments of this application have been described in detail above with reference to Figures 1 to 8. The apparatus embodiments of this application will be described in detail below with reference to Figures 9 and 15. It should be understood that the descriptions of the method embodiments correspond to the descriptions of the apparatus embodiments; therefore, any parts not described in detail can be referred to the preceding method embodiments.

[0355] Figure 9 is a schematic structural diagram of a communication device provided in an embodiment of this application. The communication device 900 shown in Figure 9 can be used in the terminal device in the foregoing embodiments. The communication device 900 can be a terminal device, or a device in the terminal device (e.g., a processor, chip, chip system, circuit, or a functional module, etc.), or a device that can be matched with the terminal device, or a logic module or software that can implement all or part of the terminal device.

[0356] As shown in Figure 9, the communication device 900 includes a receiving unit 910 and a synchronization unit 920, as detailed below:

[0357] The receiving unit 910 is used to receive a first synchronization signal block SSB, the first SSB is comprised of N SSBs, the N SSBs have the same time domain resources, the N SSBs are carried on N non-overlapping frequency domain resources, N is a positive integer, and each of the N SSBs includes a primary synchronization signal PSS and a secondary synchronization signal SSS.

[0358] Synchronization unit 920 is used to synchronize according to the first SSB;

[0359] The N SSBs satisfy one or more of the following conditions: the signal sequences of the PSS in at least two of the N SSBs are different, the signal sequences of the SSS in at least two of the N SSBs are different, or the scrambling sequences corresponding to the SSS in at least two of the N SSBs are different.

[0360] In some possible implementations, the N SSBs satisfy one or more of the following conditions:

[0361] Among the N SSBs, at least one SSB's PSS is generated based on a first part of the cell index and a first offset value, where the first part of the cell index is used to generate the physical cell identifier.

[0362] Of the N SSBs, at least one SSB's SSS is generated based on the second part of the cell index and the second offset value, where the second part of the cell index is used to generate the physical cell identifier; or...

[0363] Among the N SSBs, at least one SSS within an SSB is generated based on the second part of the cell index, and the scrambling sequence of the SSS within at least one SSB is generated based on the third offset value. The second part of the cell index is used to generate the physical cell identifier.

[0364] In some possible implementations, the first offset value corresponding to the PSS within the at least one SSB is determined based on the offset of the frequency domain position of the at least one SSB relative to the first reference frequency domain position, or the first offset value corresponding to the PSS within the at least one SSB is determined based on the index of the at least one SSB.

[0365] In some possible implementations, the second offset value corresponding to the SSS within the at least one SSB is determined based on the offset of the frequency domain position of the at least one SSB relative to the second reference frequency domain position, or the second offset value corresponding to the SSS within the at least one SSB is determined based on the index of the at least one SSB.

[0366] In some possible implementations, the third offset value corresponding to the SSS within the at least one SSB is determined based on the offset of the frequency domain position of the at least one SSB relative to the third reference frequency domain position, or the third offset value corresponding to the SSS within the at least one SSB is determined based on the index of the at least one SSB, or the third offset value corresponding to the SSS within the at least one SSB is determined based on the index of the at least one SSB among N SSBs.

[0367] Figure 10 is a schematic structural diagram of a communication device provided in an embodiment of this application. The communication device 1000 shown in Figure 10 can be used in the terminal device in the foregoing embodiments. The communication device 1000 can be a terminal device, or a device in the terminal device (processor, chip, chip system, circuit or a functional module, etc.), or a device that can be matched with the terminal device, or a logic module or software that can implement all or part of the terminal device.

[0368] As shown in Figure 10, the communication device 1000 includes a receiving unit 1010 and a synchronization unit 1020, as detailed below:

[0369] The receiving unit 1010 is used to receive a first synchronization signal block SSB, the first SSB including a set of synchronization signals SS and M physical broadcast channels PBCH, the M PBCH are carried on M non-overlapping frequency domain resources, M is an integer greater than 1, and at least two of the M PBCH have different scrambling sequences.

[0370] Synchronization unit 1020 is used to synchronize according to the first SSB.

[0371] In some possible implementations, the scrambling sequence of at least one PBCH among the M PBCHs is determined based on the index of the at least two PBCHs, or the scrambling sequence of the at least one PBCH is determined based on the index of the at least one PBCH among the M PBCHs.

[0372] In some possible implementations, the first SSB further includes M demodulation reference signals (DMRS), each of which corresponds one-to-one with the M PBCHs, and at least two of the M DRMS ​​have different signal sequences and / or different scrambling sequences.

[0373] In some possible implementations, the signal sequence of at least one of the M DMRSs is determined based on the index of at least one PBCH corresponding to the at least one DMRS; and / or,

[0374] Of the M DMRS, the signal sequence of at least one DMRS is determined according to the index of the first SSB, and the scrambling sequence of the at least one DMRS is determined according to the index of at least one PBCH corresponding to the at least one DMRS, or the scrambling sequence of the at least one DMRS is determined according to the index of at least one PBCH corresponding to the at least one DMRS in the M PBCHs.

[0375] In some possible implementations, the index of the at least one PBCH is determined based on one or more of the following information:

[0376] The index of the first SSB and the frequency domain resources of the DMRS corresponding to the at least one PBCH, the signal sequence of the DMRS corresponding to the at least one PBCH, or the scrambling sequence of the DMRS corresponding to the at least one PBCH;

[0377] The index of the at least one PBCH in the M PBCHs is determined based on one or more of the following information:

[0378] The index of the first SSB and the frequency domain resources of the DMRS corresponding to the at least one PBCH, the signal sequence of the DMRS corresponding to the at least one PBCH, or the scrambling sequence of the DMRS corresponding to the at least one PBCH.

[0379] Figure 11 is a schematic structural diagram of a communication device provided in an embodiment of this application. The communication device 1100 shown in Figure 11 can be used in the terminal device in the foregoing embodiments. The communication device 1100 can be a terminal device, or a device in the terminal device (e.g., a processor, chip, chip system, circuit, or a functional module, etc.), or a device that can be matched with the terminal device, or a logic module or software that can implement all or part of the terminal device.

[0380] As shown in Figure 11, the communication device 1100 includes a receiving unit 1110, as detailed below:

[0381] The receiving unit 1110 is used to receive a first downlink control information (DCI), which is one of T DCIs. Each of the T DCIs is used to schedule the terminal device to receive the common downlink shared channel, where T is an integer greater than 1.

[0382] The receiving unit 1110 is used to receive a first common downlink shared channel and a first demodulation reference signal (DMRS) corresponding to the first common downlink shared channel. The first common downlink shared channel is one of T common downlink shared channels, and the first DMRS is one of T DMRS. The T common downlink shared channels correspond one-to-one with the T DMRS. At least two of the T common downlink shared channels are scrambled by different scrambling sequences, and / or at least two of the T DMRS have different signal sequences.

[0383] In some possible implementations, the T DCIs correspond to T synchronization signal blocks (SSBs).

[0384] In some possible implementations, the scrambling sequence of at least one of the T common downlink shared channels is a sequence obtained by initializing with a first initialization factor, and the first initialization factor corresponding to the at least one common downlink shared channel is generated based on the offset value of the first initialization factor.

[0385] In some possible implementations, the first initialization factor offset value corresponding to the at least one common downlink shared channel is indicated by downlink control information, or the first initialization factor offset value corresponding to the at least one common downlink shared channel is determined according to the index of the synchronization signal block (SSB) corresponding to the at least one common downlink shared channel.

[0386] In some possible implementations, the signal sequence of at least one of the T DMRSs is a sequence obtained by initializing it with a second initialization factor, and the second initialization factor corresponding to the at least one DMRS is generated based on the offset value of the second initialization factor.

[0387] In some possible implementations, the second initialization factor offset value corresponding to the at least one DMRS is indicated by downlink control information, or the second initialization factor offset value corresponding to the at least one DMRS is determined based on the index of the synchronization signal block SSB corresponding to the at least one DMRS.

[0388] In some possible implementations, the T DCIs are located within the same time domain resource, and the T DCIs are carried on T non-overlapping frequency domain resources; and / or, at least two of the T common downlink shared channels are located within the same time domain resource, and at least two of the T common downlink shared channels are carried on non-overlapping frequency domain resources.

[0389] In some possible implementations, the common downlink shared channel is used to carry system information or paging messages.

[0390] Figure 12 is a schematic structural diagram of a communication device provided in an embodiment of this application. The communication device 1200 shown in Figure 12 can be used in the network device in the foregoing embodiments. The communication device 1200 can be a network device, or a device in the network device (processor, chip, chip system, circuit or a functional module, etc.), or a device that can be used in conjunction with the network device, or a logic module or software that can implement all or part of the network device.

[0391] As shown in Figure 12, the communication device 1200 includes a generation unit 1210 and a transmission unit 1220, as detailed below:

[0392] The generation unit 1210 is used to generate a first synchronization signal block SSB. The first SSB includes N SSBs. The N SSBs have the same time domain resources and are carried on N non-overlapping frequency domain resources. N is a positive integer. Each of the N SSBs includes a primary synchronization signal PSS and an auxiliary synchronization signal SSS.

[0393] Transmitting unit 1220 is used to transmit the first SSB;

[0394] The N SSBs satisfy one or more of the following conditions: the signal sequences of the PSS in at least two of the N SSBs are different, the signal sequences of the SSS in at least two of the N SSBs are different, or the scrambling sequences corresponding to the SSS in at least two of the N SSBs are different.

[0395] In some possible implementations, the N SSBs satisfy one or more of the following conditions:

[0396] Among the N SSBs, at least one SSB's PSS is generated based on a first part of the cell index and a first offset value, where the first part of the cell index is used to generate the physical cell identifier.

[0397] Of the N SSBs, at least one SSB's SSS is generated based on the second part of the cell index and the second offset value, where the second part of the cell index is used to generate the physical cell identifier; or...

[0398] Among the N SSBs, at least one SSS within an SSB is generated based on the second part of the cell index, and the scrambling sequence of the SSS within at least one SSB is generated based on the third offset value. The second part of the cell index is used to generate the physical cell identifier.

[0399] In some possible implementations, the first offset value corresponding to the PSS within the at least one SSB is determined based on the offset of the frequency domain position of the at least one SSB relative to the first reference frequency domain position, or the first offset value corresponding to the PSS within the at least one SSB is determined based on the index of the at least one SSB.

[0400] In some possible implementations, the second offset value corresponding to the SSS within the at least one SSB is determined based on the offset of the frequency domain position of the at least one SSB relative to the second reference frequency domain position, or the second offset value corresponding to the SSS within the at least one SSB is determined based on the index of the at least one SSB.

[0401] In some possible implementations, the third offset value corresponding to the SSS within the at least one SSB is determined based on the offset of the frequency domain position of the at least one SSB relative to the third reference frequency domain position, or the third offset value corresponding to the SSS within the at least one SSB is determined based on the index of the at least one SSB, or the third offset value corresponding to the SSS within the at least one SSB is determined based on the index of the at least one SSB among N SSBs.

[0402] Figure 13 is a schematic structural diagram of a communication device provided in an embodiment of this application. The communication device 1300 shown in Figure 13 can be used in the network device in the foregoing embodiments. The communication device 1300 can be a network device, or a device in the network device (processor, chip, chip system, circuit or a functional module, etc.), or a device that can be used in conjunction with the network device, or a logic module or software that can implement all or part of the network device.

[0403] As shown in Figure 13, the communication device 1300 includes a generation unit 1310 and a transmission unit 1320, as detailed below:

[0404] The generation unit 1310 is used to generate a first synchronization signal block SSB. The first SSB includes a set of synchronization signals SS and M physical broadcast channels PBCH. The M PBCH are carried on M non-overlapping frequency domain resources, where M is an integer greater than 1. At least two of the M PBCH have different scrambling sequences.

[0405] The transmitting unit 1320 is used to transmit the first SSB.

[0406] In some possible implementations, the scrambling sequence of at least one PBCH among the M PBCHs is determined based on the index of the at least two PBCHs, or the scrambling sequence of the at least one PBCH is determined based on the index of the at least one PBCH among the M PBCHs.

[0407] In some possible implementations, the first SSB further includes M demodulation reference signals (DMRS), each of which corresponds one-to-one with the M PBCHs, and at least two of the M DRMS ​​have different signal sequences and / or different scrambling sequences.

[0408] In some possible implementations, the signal sequence of at least one of the M DMRSs is determined based on the index of at least one PBCH corresponding to the at least one DMRS; and / or,

[0409] Of the M DMRS, the signal sequence of at least one DMRS is determined according to the index of the first SSB, and the scrambling sequence of the at least one DMRS is determined according to the index of at least one PBCH corresponding to the at least one DMRS, or the scrambling sequence of the at least one DMRS is determined according to the index of at least one PBCH corresponding to the at least one DMRS in the M PBCHs.

[0410] In some possible implementations, the index of the at least one PBCH is determined based on one or more of the following information:

[0411] The index of the first SSB and the frequency domain resources of the DMRS corresponding to the at least one PBCH, the signal sequence of the DMRS corresponding to the at least one PBCH, or the scrambling sequence of the DMRS corresponding to the at least one PBCH;

[0412] The index of the at least one PBCH in the M PBCHs is determined based on one or more of the following information:

[0413] The index of the first SSB and the frequency domain resources of the DMRS corresponding to the at least one PBCH, the signal sequence of the DMRS corresponding to the at least one PBCH, or the scrambling sequence of the DMRS corresponding to the at least one PBCH.

[0414] Figure 14 is a schematic structural diagram of a communication device provided in an embodiment of this application. The communication device 1400 shown in Figure 14 can be used in the network device in the foregoing embodiments. The communication device 1400 can be a network device, or a device in the network device (processor, chip, chip system, circuit or a functional module, etc.), or a device that can be used in conjunction with the network device, or a logic module or software that can implement all or part of the network device.

[0415] As shown in Figure 14, the communication device 1400 includes a transmitting unit 1410, as detailed below:

[0416] The transmitting unit 1410 is used to transmit a first downlink control information (DCI), which is one of T DCIs. Each of the T DCIs is used to schedule the terminal device to receive the common downlink shared channel, where T is an integer greater than 1.

[0417] The transmitting unit 1410 is used to transmit a first common downlink shared channel and a first demodulation reference signal (DMRS) corresponding to the first common downlink shared channel. The first common downlink shared channel is one of T common downlink shared channels, and the first DMRS is one of T DMRS. The T common downlink shared channels correspond one-to-one with the T DMRS. At least two of the T common downlink shared channels are scrambled with different scrambling sequences, and / or at least two of the T DMRS have different signal sequences.

[0418] In some possible implementations, the T DCIs correspond to T synchronization signal blocks (SSBs).

[0419] In some possible implementations, the scrambling sequence of at least one of the T common downlink shared channels is a sequence obtained by initializing with a first initialization factor, and the first initialization factor corresponding to the at least one common downlink shared channel is generated based on the offset value of the first initialization factor.

[0420] In some possible implementations, the first initialization factor offset value corresponding to the at least one common downlink shared channel is indicated by downlink control information, or the first initialization factor offset value corresponding to the at least one common downlink shared channel is determined according to the index of the synchronization signal block (SSB) corresponding to the at least one common downlink shared channel.

[0421] In some possible implementations, the signal sequence of at least one of the T DMRSs is a sequence obtained by initializing it with a second initialization factor, and the second initialization factor corresponding to the at least one DMRS is generated based on the offset value of the second initialization factor.

[0422] In some possible implementations, the second initialization factor offset value corresponding to the at least one DMRS is indicated by downlink control information, or the second initialization factor offset value corresponding to the at least one DMRS is determined based on the index of the synchronization signal block SSB corresponding to the at least one DMRS.

[0423] In some possible implementations, the T DCIs are located within the same time domain resource, and the T DCIs are carried on T non-overlapping frequency domain resources; and / or, at least two of the T common downlink shared channels are located within the same time domain resource, and at least two of the T common downlink shared channels are carried on non-overlapping frequency domain resources.

[0424] In some possible implementations, the common downlink shared channel is used to carry system information or paging messages.

[0425] Figure 15 is a schematic structural diagram of an apparatus provided in an embodiment of this application. The dashed lines in Figure 15 indicate that the unit or module is optional. This apparatus 1500 can be used to implement the methods described in the above method embodiments. Apparatus 1500 can be a chip or a communication device.

[0426] Apparatus 1500 may include one or more processors 1510. The processor 1510 may support apparatus 1500 in implementing the methods described in the preceding method embodiments. The processor 1510 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be other general-purpose processors, microprocessor units (MPUs), microcontroller units (MCUs), graphics processing units (GPUs), artificial intelligence processors (AI processors) or neural processing units (NPUs), digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0427] The device 1500 may further include one or more memories 1520. The memories 1520 store a program that can be executed by the processor 1510, causing the processor 1510 to perform the methods described in the preceding method embodiments. The memories 1520 may be independent of the processor 1510 or integrated within the processor 1510. In this embodiment, the memories 1520 may include, but are not limited to, cache, read-only memory (ROM), random access memory (RAM), synchronous dynamic random access memory (SDRAM), hard disk drive (HDD) or solid-state drive (SSD), erasable programmable read-only memory (EPROM), or compact disc read-only memory (CD-ROM), etc.

[0428] The device 1500 may also include a transceiver 1530. The processor 1510 can communicate with other devices or chips via the transceiver 1530. For example, the processor 1510 can send and receive data with other devices or chips via the transceiver 1530.

[0429] It should be noted that the information interaction and execution process between the above-mentioned devices / units are based on the same concept as the method embodiments of this application. For details on their specific functions and technical effects, please refer to the method embodiments section, and they will not be repeated here.

[0430] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0431] This application also provides a computer-readable storage medium storing a computer program that, when run on a computer, causes the computer to perform the steps described in the various method embodiments above.

[0432] This application also provides a computer program product, which includes a computer program that, when run on a computer, causes the computer to perform the steps described in the various method embodiments above.

[0433] This application also provides a chip, which includes a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, so that a device or equipment (such as a communication device) with the chip installed performs the steps in the above-described method embodiments.

[0434] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of this application can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or some intermediate form. The computer-readable storage medium can include at least: any entity or device capable of carrying computer program code to a device / app, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium. Examples include USB flash drives, portable hard drives, magnetic disks, or optical disks. In some possible implementations, the computer-readable storage medium may not be an electrical carrier signal or a telecommunication signal.

[0435] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0436] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0437] In the embodiments provided in this application, it should be understood that the disclosed apparatus / devices and methods can be implemented in other ways. For example, the apparatus / device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0438] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0439] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

A communication method characterized by comprising: The method comprises: receiving a first synchronization signal block (SSB), the first SSB being included in N SSBs, the N SSBs having same time domain resources, the N SSBs being carried on N non-overlapping frequency domain resources, N being a positive integer, each of the N SSBs comprising a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); synchronizing according to the first SSB; wherein the N SSBs satisfy one or more of the following conditions: signal sequences of the PSS in at least two of the N SSBs are different, signal sequences of the SSS in at least two of the N SSBs are different, or scrambling sequences corresponding to the SSS in at least two of the N SSBs are different. A communication method characterized by comprising: The method comprises: generating a first synchronization signal block (SSB), the first SSB being included in N SSBs, the N SSBs having same time domain resources, the N SSBs being carried on N non-overlapping frequency domain resources, N being a positive integer, each of the N SSBs comprising a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); transmitting the first SSB; wherein the N SSBs satisfy one or more of the following conditions: signal sequences of the PSS in at least two of the N SSBs are different, signal sequences of the SSS in at least two of the N SSBs are different, or scrambling sequences corresponding to the SSS in at least two of the N SSBs are different. The method according to claim 1 or 2, characterized in that The N SSBs satisfy one or more of the following conditions: in at least one of the N SSBs, the PSS is generated according to a first partial cell index and a first offset value, the first partial cell index being used to generate a physical cell identity; in at least one of the N SSBs, the SSS is generated according to a second partial cell index and a second offset value, the second partial cell index being used to generate a physical cell identity; or, in at least one of the N SSBs, the SSS is generated according to a second partial cell index, and a scrambling sequence of the SSS in the at least one SSB is generated according to a third offset value, the second partial cell index being used to generate a physical cell identity. The method according to claim 3, characterized in that The first offset value corresponding to the PSS in the at least one SSB is determined according to an offset amount of a frequency domain position of the at least one SSB relative to a first reference frequency domain position, or the first offset value corresponding to the PSS in the at least one SSB is determined according to an index of the at least one SSB. The method according to claim 3 or 4, characterized in that The second offset value corresponding to the SSS in the at least one SSB is determined according to an offset amount of a frequency domain position of the at least one SSB relative to a second reference frequency domain position, or the second offset value corresponding to the SSS in the at least one SSB is determined according to an index of the at least one SSB. The method according to any one of claims 3 to 5, characterized in that A third offset value corresponding to the SSS in the at least one SSB is determined according to an offset of a frequency domain position of the at least one SSB relative to a third reference frequency domain position, or the third offset value corresponding to the SSS in the at least one SSB is determined according to an index of the at least one SSB, or the third offset value corresponding to the SSS in the at least one SSB is determined according to an index of the at least one SSB in N SSBs. A communication method characterized by comprising: Comprising: Receiving a first synchronization signal block (SSB), the first SSB comprising a set of synchronization signals (SS) and M physical broadcast channels (PBCHs), the M PBCHs being carried on M non-overlapping frequency domain resources, M being an integer greater than 1, scrambling sequences of at least two of the M PBCHs being different; Synchronizing according to the first SSB. A communication method characterized by comprising: Comprising: Generating a first synchronization signal block (SSB), the first SSB comprising a set of synchronization signals (SS) and M physical broadcast channels (PBCHs), the M PBCHs being carried on M non-overlapping frequency domain resources, M being an integer greater than 1, scrambling sequences of at least two of the M PBCHs being different; Transmitting the first SSB. The method according to claim 7 or 8, characterized in that For at least one of the M PBCHs, a scrambling sequence thereof is determined according to an index of the at least one PBCH, or a scrambling sequence thereof is determined according to an index of the at least one PBCH in the M PBCHs. The method according to any one of claims 7 to 9, characterized in that The first SSB further comprises M demodulation reference signals (DMRSs), the M DMRSs corresponding to the M PBCHs one-to-one, signal sequences of at least two of the M DMRSs being different and / or scrambling sequences thereof being different. The method of claim 10, wherein For at least one of the M DMRSs, a signal sequence thereof is determined according to an index of at least one PBCH corresponding to the at least one DMRS; and / or, For at least one of the M DMRSs, a signal sequence thereof is determined according to an index of the first SSB, a scrambling sequence thereof is determined according to an index of at least one PBCH corresponding to the at least one DMRS, or a scrambling sequence thereof is determined according to an index of the at least one PBCH in the M PBCHs. A communication method characterized by comprising: Comprising: Receiving a first downlink control information (DCI), the first DCI being one of T DCIs, each of the T DCIs being used for scheduling a terminal device to receive a common downlink shared channel, T being an integer greater than 1; receive a first common downlink shared channel and a first demodulation reference signal DMRS corresponding to the first common downlink shared channel, the first common downlink shared channel being one of T common downlink shared channels, the first DMRS being one of T DMRSs, the T common downlink shared channels one-to-one corresponding to the T DMRSs, at least two of the T common downlink shared channels being scrambled by different scrambling sequences, and / or, signal sequences of at least two of the T DMRSs being different. A communication method characterized by comprising: comprising: transmit a first downlink control information DCI, the first DCI being one of T DCIs, each of the T DCIs being used for scheduling a terminal device to receive a common downlink shared channel, T being an integer greater than 1; transmit a first common downlink shared channel and a first demodulation reference signal DMRS corresponding to the first common downlink shared channel, the first common downlink shared channel being one of T common downlink shared channels, the first DMRS being one of T DMRSs, the T common downlink shared channels one-to-one corresponding to the T DMRSs, at least two of the T common downlink shared channels being scrambled by different scrambling sequences, and / or, signal sequences of at least two of the T DMRSs being different. The method according to claim 12 or 13, characterized in that The T DCIs correspond to T synchronization signal blocks SSBs respectively. The method according to any one of claims 12 to 14, characterized in that A scrambling sequence of at least one of the T common downlink shared channels is a sequence initialized by a first initialization factor, a first initialization factor corresponding to the at least one common downlink shared channel being generated according to a first initialization factor offset value. The method of claim 15, wherein The first initialization factor offset value corresponding to the at least one common downlink shared channel is indicated by downlink control information, or the first initialization factor offset value corresponding to the at least one common downlink shared channel is determined according to an index of a synchronization signal block SSB corresponding to the at least one common downlink shared channel. The method according to any one of claims 12 to 16, characterized in that A signal sequence of at least one of the T DMRSs is a sequence initialized by a second initialization factor, a second initialization factor corresponding to the at least one DMRS being generated according to a second initialization factor offset value. The method of claim 17, wherein The second initialization factor offset value corresponding to the at least one DMRS is indicated by downlink control information, or the second initialization factor offset value corresponding to the at least one DMRS is determined according to an index of a synchronization signal block SSB corresponding to the at least one DMRS. The method according to any one of claims 12 to 18, characterized in that The T DCIs are located in a same time domain resource, the T DCIs being carried on T non-overlapping frequency domain resources; and / or, at least two of the T common downlink shared channels are located in a same time domain resource, the at least two of the T common downlink shared channels being carried on non-overlapping frequency domain resources. The method according to any one of claims 12 to 19, characterized in that The common downlink shared channel is used for carrying system information or a paging message. A communication device characterized by comprising: comprising: a module or unit for performing the method of any of claims 1 to 20. A communication device characterized by comprising: comprising: A processor coupled with a memory for storing a computer program which, when executed by the processor, causes the apparatus to perform the method of any one of claims 1 to 20. A computer-readable storage medium, characterized by, The computer readable storage medium has stored thereon a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 20. A computer program product, characterized in that Comprising: A computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 20. A chip characterized by Comprising: A processor coupled with a memory for storing a computer program which, when executed by the processor, causes the apparatus to perform the method of any one of claims 1 to 20.

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