Communication method, device and system

Abstract

The embodiment of the invention provides a communication method, device and system, which are used for reducing the time delay of beam scanning so as to improve the initial access efficiency of terminal equipment. In the method, a plurality of SSBs can be transmitted at the same time. In addition, according to the method, a method for determining indexes of a plurality of SSBs is also defined, so that the SSBs are detected by a receiving end. The method comprises: receiving a plurality of synchronization signals and a physical broadcast channel block (SSB) at a first time; wherein cyclic shifts corresponding to auxiliary synchronization signal (SSS) sequences included in each SSB are different; determining indexes of a plurality of SSBs according to the first beam index; wherein the first beam index is determined according to a plurality of SSS sequences included in the plurality of SSBs.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to communication methods, apparatus and systems. Background Technology

[0002] A synchronization signal and physical broadcast channel block (SSB) burst set is a set of multiple SSBs transmitted by the base station within a single period. The purpose of setting up SSB burst sets is to use beam scanning technology to ensure that SSBs cover the entire cell, guaranteeing that all terminal devices within the cell can receive the SSBs.

[0003] In beam scanning technology, a base station can transmit multiple SSBs belonging to the same SSB burst set. These multiple SSBs are time-division multiplexed, meaning that each SSB is transmitted at a different time. Typically, the base station can transmit these multiple SSBs at fixed time intervals. Furthermore, each SSB corresponds to a beam direction, allowing the base station to broadcast SSBs in different directions.

[0004] However, an SSB burst is time-division multiplexed, which causes a longer beam scanning delay and thus affects the efficiency of initial access for terminal devices. Summary of the Invention

[0005] This application provides a communication method, apparatus, and system for reducing beam scanning latency to improve the efficiency of initial access for terminal devices.

[0006] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0007] In a first aspect, a communication method is provided. The apparatus for executing the communication method can be a terminal device, or a module applied in the terminal device to realize its communication function, such as a chip, a chip system, a module, or a component. The communication method includes: receiving multiple synchronization signals and physical broadcast channel blocks (SSBs) at a first time; wherein each SSB includes an auxiliary synchronization signal (SSS) sequence with a different cyclic shift; determining the index of the multiple SSBs according to a first beam index; wherein the first beam index is determined based on the multiple SSS sequences included in the multiple SSBs.

[0008] In the communication method provided in this application embodiment, multiple SSBs can be transmitted simultaneously (i.e., at the first time), thereby reducing beam scanning latency and improving the efficiency of initial access for terminal devices. Furthermore, the communication method provided in this application embodiment clarifies the method for determining the index of multiple SSBs, thereby enabling the receiving end to detect the SSBs.

[0009] In conjunction with the first aspect described above, in one possible implementation, the method further includes: obtaining a first correspondence; wherein the first correspondence is a correspondence between cyclic shift and a third beam index, the third beam index including the first beam index; based on the first correspondence, determining the third beam index corresponding to the first cyclic shift as the first beam index, the first cyclic shift corresponding to a peak value, the peak value being the correlation peak value between the multiple SSS sequences included in the multiple SSBs and the first root sequence, the first root sequence belonging to the root sequence set. In this scheme, the terminal device can correlate the multiple SSS sequences with the root sequences in the root sequence set to obtain the first root sequence and the first beam index.

[0010] In conjunction with the first aspect described above, in one possible implementation, the plurality of SSBs includes a first demodulation reference signal (DM-RS) sequence; determining the index of the plurality of SSBs based on a first beam index includes: determining the index of the plurality of SSBs based on the first beam index and a second beam index; wherein the second beam index is determined based on the first DM-RS sequence. In this scheme, in addition to the first beam index, the second beam index can also be used to determine the index of the plurality of SSBs. Compared to the current scheme where the terminal device only determines the index of the SSB based on the second beam index, this scheme can identify more SSBs.

[0011] In conjunction with the first aspect described above, in one possible implementation, the indices of the plurality of SSBs are the sum of a first product and the first beam index, where the first product is the product of the number of the third beam index and the second beam index. For example, when the first beam indexes are #0 and #2, and the number of the third beam indexes is 8 (i.e., the third beam indexes are #0 to #7), if the second beam index is #0, then the indices of the two SSBs are #0 and #2; if the second beam index is #1, then the indices of the two SSBs are #8 and #10.

[0012] In conjunction with the first aspect described above, in one possible implementation, the method further includes: detecting a DM-RS sequence based on a second cyclic shift on a first time-frequency resource; wherein the first time-frequency resource is determined based on multiple SSS sequences included in the plurality of SSBs, and the second cyclic shift is determined based on the first cyclic shift. In this scheme, since there is a correspondence between the first cyclic shift and the first beam index, the second cyclic shift can also be described as being determined by the terminal device based on the first beam index. The terminal device can determine the second cyclic shift based on the first cyclic shift or the first beam index; specifically, the terminal device can determine the second cyclic shift through formula calculation or lookup table.

[0013] In conjunction with the first aspect above, in one possible implementation, the second cyclic shift corresponding to the same first beam index is the same as the first cyclic shift.

[0014] In conjunction with the first aspect described above, in one possible implementation, the method further includes: obtaining a second correspondence; wherein the second correspondence is a correspondence between the root sequence corresponding to the DM-RS sequence and the fourth beam index, the fourth beam index including the second beam index; and determining the fourth beam index corresponding to the root sequence corresponding to the first DM-RS sequence as the second beam index based on the second correspondence. In this scheme, the terminal device can determine the second beam index based on the root sequence corresponding to the first DM-RS sequence.

[0015] Secondly, a communication method is provided. The apparatus for executing the communication method can be a terminal device, or a module applied to the terminal device to implement its communication function, such as a chip, a chip system, a module, or a component. The communication method includes: receiving multiple synchronization signals and physical broadcast channel blocks (SSBs) at a first time; wherein each SSB includes auxiliary synchronization signal (SSS) sequences with different cyclic shifts and symbol numbers; determining the index of the multiple SSBs according to a first beam index; wherein the first beam index is determined based on the multiple SSS sequences included in the multiple SSBs.

[0016] In the communication method provided in this application embodiment, multiple SSBs can be transmitted simultaneously (i.e., at the first time), thereby reducing beam scanning latency and improving the efficiency of initial access for terminal devices. Furthermore, the communication method provided in this application embodiment clarifies the method for determining the indexes of multiple SSBs, thus enabling the receiving end to detect SSBs. Because the communication method provided in this application embodiment introduces a symbol numbering dimension based on cyclic shifting, it can identify more SSBs.

[0017] In conjunction with the second aspect described above, in one possible implementation, the method further includes: obtaining a third correspondence; wherein the third correspondence is a correspondence between symbol number, cyclic shift, and third beam index, and the third beam index includes the first beam index; based on the third correspondence, determining the third beam index corresponding to the first symbol number and the first cyclic shift as the first beam index, wherein at least one SSS sequence on the symbol corresponding to the first symbol number has a correlation peak with the first root sequence, the first root sequence belongs to the root sequence set, and the first cyclic shift corresponds to the correlation peak. In this scheme, on each symbol, the terminal device can correlate at least one SSS sequence with the root sequences in the root sequence set to obtain the first root sequence and the first beam index.

[0018] In conjunction with the second aspect described above, in one possible implementation, the plurality of SSBs includes a first demodulation reference signal (DM-RS) sequence; determining the index of the plurality of SSBs based on a first beam index includes: determining the index of the plurality of SSBs based on the first beam index and a second beam index; wherein the second beam index is determined based on the first DM-RS sequence. In this scheme, in addition to the first beam index, the second beam index can also be used to determine the index of the plurality of SSBs. Compared to the current scheme where the terminal device only determines the index of the SSB based on the second beam index, this scheme can identify more SSBs.

[0019] In conjunction with the second aspect above, in one possible implementation, the indices of the plurality of SSBs are the sum of a first product and the first beam index, where the first product is the product of the number of the third beam index and the second beam index. For example, when the first beam indexes are #0 and #2, and the number of the third beam indexes is 8 (i.e., the third beam indexes are #0 to #7), if the second beam index is #0, then the indices of the two SSBs are #0 and #2; if the second beam index is #1, then the indices of the two SSBs are #8 and #10.

[0020] In conjunction with the second aspect described above, in one possible implementation, the method further includes: detecting the DM-RS sequence based on a second cyclic shift on a first time-frequency resource; wherein the first time-frequency resource is determined based on multiple SSS sequences included in the plurality of SSBs, and the second cyclic shift is determined based on the first cyclic shift. In this scheme, since there is a correspondence between the first cyclic shift and the first beam index, the second cyclic shift can also be described as being determined by the terminal device based on the first beam index. The terminal device can determine the second cyclic shift based on the first cyclic shift or the first beam index; specifically, the terminal device can determine the second cyclic shift through formula calculation or lookup table.

[0021] In conjunction with the second aspect above, in one possible implementation, the second cyclic shift corresponding to the same first beam index is the same as the first cyclic shift.

[0022] In conjunction with the second aspect described above, in one possible implementation, the method further includes: obtaining a second correspondence; wherein the second correspondence is a correspondence between the root sequence corresponding to the DM-RS sequence and the fourth beam index, the fourth beam index including the second beam index; and determining the fourth beam index corresponding to the root sequence corresponding to the first DM-RS sequence as the second beam index based on the second correspondence. In this scheme, the terminal device can determine the second beam index based on the root sequence corresponding to the first DM-RS sequence.

[0023] Thirdly, a communication method is provided. The apparatus for executing the communication method can be a terminal device, or a module applied in the terminal device to realize its communication function, such as a chip, a chip system, a module, or a component. The communication method includes: receiving multiple synchronization signals and physical broadcast channel blocks (SSBs) at a first time; wherein each SSB includes an auxiliary synchronization signal (SSS) sequence with a different root sequence; determining the index of the multiple SSBs according to a first beam index; wherein the first beam index is determined based on the multiple SSS sequences included in the multiple SSBs.

[0024] In the communication method provided in this application embodiment, multiple SSBs can be transmitted simultaneously (i.e., at the first time), thereby reducing beam scanning latency and improving the efficiency of initial access for terminal devices. Furthermore, the communication method provided in this application embodiment clarifies the method for determining the index of multiple SSBs, thereby enabling the receiving end to detect the SSBs.

[0025] In conjunction with the third aspect described above, in one possible implementation, the method further includes: obtaining a fourth correspondence; wherein the fourth correspondence is a correspondence between a first value and a third beam index, the first value is used to generate a root sequence, the third beam index includes the first beam index, and each third beam index corresponds to multiple first values; based on the fourth correspondence, the third beam index corresponding to the second value is determined as the first beam index, the first value includes the second value, the second value corresponds to a first root sequence, the first root sequence has a correlation peak with multiple SSS sequences included in the multiple SSBs, and the first root sequence belongs to the root sequence set. In this scheme, the terminal device can correlate multiple SSS sequences with each root sequence in the root sequence set to obtain the first root sequence and the first beam index.

[0026] In conjunction with the third aspect described above, in one possible implementation, the plurality of SSBs includes a first demodulation reference signal (DM-RS) sequence; determining the index of the plurality of SSBs based on a first beam index includes: determining the index of the plurality of SSBs based on the first beam index and a second beam index; wherein the second beam index is determined based on the first DM-RS sequence. In this scheme, in addition to the first beam index, the second beam index can also be used to determine the index of the plurality of SSBs. Compared to the current scheme where the terminal device only determines the index of the SSB based on the second beam index, this scheme can identify more SSBs.

[0027] In conjunction with the third aspect described above, in one possible implementation, the indices of the plurality of SSBs are the sum of a first product and the first beam index, where the first product is the product of the number of the third beam index and the second beam index. For example, when the first beam indexes are #0 and #2, and the number of the third beam indexes is 8 (i.e., the third beam indexes are #0 to #7), if the second beam index is #0, then the indices of the two SSBs are #0 and #2; if the second beam index is #1, then the indices of the two SSBs are #8 and #10.

[0028] In conjunction with the third aspect described above, in one possible implementation, the method further includes: detecting a DM-RS sequence based on a second cyclic shift on a first time-frequency resource; wherein the first time-frequency resource is determined based on multiple SSS sequences included in the plurality of SSBs, and the second cyclic shift is determined based on the first beam index. In this scheme, the terminal device can determine the second cyclic shift based on the first beam index, and the terminal device can specifically determine the second cyclic shift through formula calculation or lookup table.

[0029] In conjunction with the third aspect above, in one possible implementation, the first time-frequency resource is determined based on multiple SSS sequences included in the plurality of SSBs, including: the first time-frequency resource is determined based on the cell identifier, the cell identifier is determined based on the second value, and the second value is determined based on the multiple SSS sequences included in the plurality of SSBs; wherein, the cell identifier... Second value The following relationship must be satisfied:

[0030]

[0031] Where M represents the number of third beam indices, This indicates rounding down. It is determined based on the multiple master synchronization signals (PSS) included in multiple SSBs. In this scheme... and The relationship between them is different from that in existing technologies. and The relationship between them.

[0032] In conjunction with the third aspect described above, in one possible implementation, the method further includes: obtaining a second correspondence; wherein the second correspondence is a correspondence between the root sequence corresponding to the DM-RS sequence and the fourth beam index, and the fourth beam index includes the second beam index; and determining the fourth beam index corresponding to the root sequence corresponding to the first DM-RS sequence as the second beam index based on the second correspondence. In this scheme, the terminal device can determine the second beam index based on the root sequence corresponding to the first DM-RS sequence.

[0033] Fourthly, a communication device is provided for implementing the above-described method. This communication device includes modules, units, or means corresponding to the implementation of the above-described method. These modules, units, or means can be implemented in hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above-described functions.

[0034] In conjunction with the fourth aspect above, in one possible implementation, the communication device includes: a transceiver module and a determination module; the transceiver module is configured to receive multiple synchronization signals and physical broadcast channel blocks (SSBs) at a first time; wherein each SSB includes an auxiliary synchronization signal (SSS) sequence with a different cyclic shift; the determination module is configured to determine the index of the multiple SSBs according to a first beam index; wherein the first beam index is determined according to the multiple SSS sequences included in the multiple SSBs.

[0035] In conjunction with the fourth aspect above, in one possible implementation, the communication device further includes: an acquisition module; the acquisition module is configured to acquire a first correspondence; wherein the first correspondence is a correspondence between cyclic shift and a third beam index, and the third beam index includes the first beam index; the determination module is further configured to determine the third beam index corresponding to the first cyclic shift as the first beam index according to the first correspondence, wherein the first cyclic shift corresponds to a peak value, and the peak value is the correlation peak value between the multiple SSS sequences included in the multiple SSBs and the first root sequence, and the first root sequence belongs to the root sequence set.

[0036] In conjunction with the fourth aspect above, in one possible implementation, the plurality of SSBs includes a first demodulation reference signal (DM-RS) sequence; the determining module is configured to determine the index of the plurality of SSBs according to a first beam index, including: determining the index of the plurality of SSBs according to the first beam index and a second beam index; wherein the second beam index is determined by the determining module according to the first DM-RS sequence.

[0037] In conjunction with the fourth aspect above, in one possible implementation, the index of the plurality of SSBs is the sum of a first product and a first beam index, wherein the first product is the product of the number of the third beam index and the second beam index.

[0038] In conjunction with the fourth aspect above, in one possible implementation, the communication device further includes: a detection module; the detection module is configured to detect a DM-RS sequence on a first time-frequency resource based on a second cyclic shift; wherein the first time-frequency resource is determined by the determining module based on a plurality of SSS sequences included in the plurality of SSBs, and the second cyclic shift is determined by the determining module based on the first cyclic shift.

[0039] In conjunction with the fourth aspect above, in one possible implementation, the second cyclic shift corresponding to the same first beam index is the same as the first cyclic shift.

[0040] In conjunction with the fourth aspect above, in one possible implementation, the communication device further includes: an acquisition module; the acquisition module is further configured to acquire a second correspondence; wherein the second correspondence is a correspondence between the root sequence corresponding to the DM-RS sequence and the fourth beam index, and the fourth beam index includes the second beam index; the determination module is further configured to determine the fourth beam index corresponding to the root sequence corresponding to the first DM-RS sequence as the second beam index based on the second correspondence.

[0041] The technical effects of any possible implementation of the fourth aspect can be found in the first aspect or the technical effects of different implementations of the first aspect, and will not be repeated here.

[0042] Fifthly, a communication device is provided for implementing the above-described method. The communication device includes modules, units, or means corresponding to the implementation of the above-described method. These modules, units, or means can be implemented in hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above-described functions.

[0043] In conjunction with the fifth aspect above, in one possible implementation, the communication device includes: a transceiver module and a determination module; the transceiver module is configured to receive multiple synchronization signals and physical broadcast channel blocks (SSBs) at a first time; wherein each SSB includes auxiliary synchronization signal (SSS) sequences with different cyclic shifts and symbol numbers; the determination module is configured to determine the index of the multiple SSBs according to a first beam index; wherein the first beam index is determined according to the multiple SSS sequences included in the multiple SSBs.

[0044] In conjunction with the fifth aspect above, in one possible implementation, the communication device further includes: an acquisition module; the acquisition module is configured to acquire a third correspondence; wherein the third correspondence is a correspondence between a symbol number, a cyclic shift, and a third beam index, and the third beam index includes the first beam index; the determination module is further configured to determine the third beam index corresponding to the first symbol number and the first cyclic shift as the first beam index based on the third correspondence, wherein at least one SSS sequence on the symbol corresponding to the first symbol number has a correlation peak with the first root sequence, the first root sequence belongs to the root sequence set, and the first cyclic shift corresponds to the correlation peak.

[0045] In conjunction with the fifth aspect above, in one possible implementation, the plurality of SSBs includes a first demodulation reference signal (DM-RS) sequence; the determining module is configured to determine the index of the plurality of SSBs according to a first beam index, including: determining the index of the plurality of SSBs according to the first beam index and a second beam index; wherein the second beam index is determined by the determining module according to the first DM-RS sequence.

[0046] In conjunction with the fifth aspect above, in one possible implementation, the index of the plurality of SSBs is the sum of a first product and a first beam index, wherein the first product is the product of the number of the third beam index and the second beam index.

[0047] In conjunction with the fifth aspect above, in one possible implementation, the communication device further includes: a detection module; the detection module is configured to detect a DM-RS sequence on a first time-frequency resource based on a second cyclic shift; wherein the first time-frequency resource is determined by the determining module based on a plurality of SSS sequences included in the plurality of SSBs, and the second cyclic shift is determined by the determining module based on the first cyclic shift.

[0048] In conjunction with the fifth aspect above, in one possible implementation, the second cyclic shift corresponding to the same first beam index is the same as the first cyclic shift.

[0049] In conjunction with the fifth aspect above, in one possible implementation, the communication device further includes: an acquisition module; the acquisition module is configured to acquire a second correspondence; wherein the second correspondence is a correspondence between the root sequence corresponding to the DM-RS sequence and the fourth beam index, and the fourth beam index includes the second beam index; the determination module is further configured to determine the fourth beam index corresponding to the root sequence corresponding to the first DM-RS sequence as the second beam index based on the second correspondence.

[0050] The technical effects of any possible implementation of the fifth aspect can be found in the second aspect or the technical effects of different implementations of the second aspect, and will not be repeated here.

[0051] Sixthly, a communication device is provided for implementing the above-described method. The communication device includes modules, units, or means corresponding to the implementation of the above-described method. These modules, units, or means can be implemented in hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above-described functions.

[0052] In conjunction with the sixth aspect above, in one possible implementation, the communication device includes: a transceiver module and a determination module; the transceiver module is configured to receive multiple synchronization signals and physical broadcast channel blocks (SSBs) at a first time; wherein each SSB includes an auxiliary synchronization signal (SSS) sequence with a different root sequence; the determination module is configured to determine the index of the multiple SSBs according to a first beam index; wherein the first beam index is determined according to the multiple SSS sequences included in the multiple SSBs.

[0053] In conjunction with the sixth aspect above, in one possible implementation, the communication device further includes: an acquisition module; the acquisition module is configured to acquire a fourth correspondence; wherein the fourth correspondence is a correspondence between a first value and a third beam index, the first value is used to generate a root sequence, the third beam index includes the first beam index, and each third beam index corresponds to multiple first values; the determination module is further configured to determine the third beam index corresponding to the second value as the first beam index according to the fourth correspondence, the first value includes the second value, the second value corresponds to a first root sequence, the first root sequence has a correlation peak with multiple SSS sequences included in the multiple SSBs, and the first root sequence belongs to the root sequence set.

[0054] In conjunction with the sixth aspect above, in one possible implementation, the plurality of SSBs includes a first demodulation reference signal (DM-RS) sequence; the determining module is configured to determine the index of the plurality of SSBs based on a first beam index, including: determining the index of the plurality of SSBs based on the first beam index and a second beam index; wherein the second beam index is determined by the determining module based on the first DM-RS sequence.

[0055] In conjunction with the sixth aspect above, in one possible implementation, the index of the plurality of SSBs is the sum of a first product and a first beam index, wherein the first product is the product of the number of the third beam index and the second beam index.

[0056] In conjunction with the sixth aspect above, in one possible implementation, the communication device further includes: a detection module; the detection module is configured to detect a DM-RS sequence on a first time-frequency resource based on a second cyclic shift; wherein the first time-frequency resource is determined by the determining module based on a plurality of SSS sequences included in the plurality of SSBs, and the second cyclic shift is determined by the determining module based on the first beam index.

[0057] In conjunction with the sixth aspect above, in one possible implementation, the first time-frequency resource is determined by the determining module based on multiple SSS sequences included in the plurality of SSBs, including: the first time-frequency resource is determined by the determining module based on the cell identifier, the cell identifier is determined by the determining module based on the second value, and the second value is determined by the determining module based on the multiple SSS sequences included in the plurality of SSBs; wherein, the cell identifier... Second value The following relationship must be satisfied:

[0058]

[0059] Where M represents the number of third beam indices, This indicates rounding down. It is determined based on the multiple master synchronization signals (PSS) included in the multiple SSBs.

[0060] In conjunction with the sixth aspect above, in one possible implementation, the communication device further includes: an acquisition module; the acquisition module is configured to acquire a second correspondence; wherein the second correspondence is a correspondence between the root sequence corresponding to the DM-RS sequence and the fourth beam index, and the fourth beam index includes the second beam index; the determination module is further configured to determine the fourth beam index corresponding to the root sequence corresponding to the first DM-RS sequence as the second beam index based on the second correspondence.

[0061] The technical effects of any possible implementation of the sixth aspect can be found in the third aspect or the technical effects of different implementations of the third aspect, and will not be repeated here.

[0062] A seventh aspect provides a communication device comprising: a processor; the processor being configured to be coupled to a memory, and after reading computer instructions stored in the memory, to execute, according to the instructions, the method described in any one of the first to third aspects above.

[0063] In conjunction with the seventh aspect above, in one possible implementation, the communication device further includes a memory for storing computer instructions.

[0064] In conjunction with the seventh aspect above, in one possible implementation, the communication device further includes a communication interface; this communication interface is used for the communication device to communicate with other devices. For example, the communication interface may be a transceiver, an input / output interface, an interface circuit, an output circuit, an input circuit, a pin, or related circuitry, etc.

[0065] In conjunction with the seventh aspect above, in one possible implementation, the communication device can be a chip or a chip system. When the communication device is a chip system, it can be composed of chips or may include chips and other discrete components.

[0066] In conjunction with the seventh aspect above, in one possible implementation, when the communication device is a chip or chip system, the aforementioned communication interface can be an input / output interface, interface circuit, output circuit, input circuit, pin, or related circuit on the chip or chip system. The aforementioned processor can also be embodied as a processing circuit or logic circuit.

[0067] Eighthly, a communication system is provided, including: a terminal device and a network device.

[0068] The network device is used to transmit multiple synchronization signals and physical broadcast channel blocks (SSBs), each SSB including an auxiliary synchronization signal (SSS) sequence with a different cyclic shift; the terminal device is used to perform the method described in the first aspect above.

[0069] Alternatively, the network device is used to send multiple SSBs, each SSB including a different cyclic shift and symbol number corresponding to the SSS sequence; the terminal device is used to perform the method as described in the second aspect above.

[0070] Alternatively, the network device is used to send multiple SSBs, each SSB including an SSS sequence corresponding to a different root sequence; the terminal device is used to perform the method as described in the third aspect above.

[0071] Ninth aspect, a computer-readable storage medium is provided that stores instructions which, when executed on a computer, cause the computer to perform the method described in any one of the first to third aspects.

[0072] In a tenth aspect, a computer program product containing instructions is provided, which, when run on a computer, enables the computer to perform the method described in any one of the first to third aspects.

[0073] Eleventhly, a chip is provided, the chip comprising: a processor configured to execute instructions that cause a device including the chip to perform the method described in any one of the first to third aspects.

[0074] In conjunction with the eleventh aspect above, in one possible implementation, the chip also includes a memory for storing instructions.

[0075] The technical effects of any possible implementation of aspects seven through eleven can be found in any of aspects one through three above, as well as the technical effects of any possible implementation of each of the above aspects, and will not be repeated here. Attached Figure Description

[0076] Figure 1 This is a schematic diagram of the time-frequency resources occupied by SSB in a 5G NR system.

[0077] Figure 2 This is a schematic diagram of the frequency domain resources occupied by DM-RS in a 5G NR system.

[0078] Figure 3 This is a schematic diagram of the architecture of the communication system provided in the embodiments of this application;

[0079] Figure 4 This is a schematic diagram of the structure of the communication device provided in the embodiments of this application;

[0080] Figure 5 Flowchart of the communication method provided in the embodiments of this application Figure 1 ;

[0081] Figure 6 Illustration of an example of a communication method provided in an embodiment of this application Figure 1 ;

[0082] Figure 7 Flowchart of the communication method provided in the embodiments of this application Figure 2 ;

[0083] Figure 8 Illustration of an example of a communication method provided in an embodiment of this application Figure 2 ;

[0084] Figure 9 Flowchart of the communication method provided in the embodiments of this application Figure 3 ;

[0085] Figure 10 Illustration of an example of a communication method provided in an embodiment of this application Figure 3 ;

[0086] Figure 11 This is a schematic diagram illustrating the composition of a communication device provided in an embodiment of this application. Detailed Implementation

[0087] Before introducing the technical solution of this application, the relevant technical terms involved in this application are explained. It is understood that these explanations are intended to make this application easier to understand and should not be regarded as a limitation on the scope of protection claimed in this application.

[0088] 1. The process of initial network access for terminal equipment in the 5th generation (5G) new radio (NR) system.

[0089] The initial network access process for terminal devices includes the following steps:

[0090] Step 1: The terminal equipment performs frequency tuning.

[0091] The terminal device can adjust to a specific frequency based on the synchronization grid of a specified frequency band in order to attempt to detect the synchronization signal at that specific frequency.

[0092] Step 2: The terminal device detects the synchronization signal.

[0093] The synchronization signal can be used by the terminal device for symbol synchronization and frame synchronization, and can also be used by the terminal device to obtain the cell identifier. For example, the cell identifier can be the physical cell identity (PCI).

[0094] Step 3: After successful synchronization, the terminal device decodes the physical broadcast channel (PBCH).

[0095] The PBCH carries basic information about the 5G NR system required by terminal devices, including master information block (MIB) messages and information related to SSB transmission time. PBCH transmission is crucial for terminal devices because any 5G NR-compatible terminal device must first obtain information from the PBCH before it can access the 5G network.

[0096] Step 4: The terminal device obtains the MIB message by decoding the PBCH.

[0097] The MIB message includes downlink system bandwidth, system frame number, subcarrier spacing, and SSB subcarrier offset.

[0098] Step 5: Configure the terminal device to search the space and find the control resource set (CORESET) 0.

[0099] The terminal device can configure the search space for the physical downlink control channel (PDCCH) based on the information in the MIB message. CORESET0 is used to transmit system information block (SIB) 1.

[0100] Step 6: The terminal device blindly checks the scheduling information of SIB1 messages in the configured search space.

[0101] The scheduling information in the SIB1 message is used to schedule SIB1. The scheduling information in the SIB1 message can be in downlink control information (DCI) format 1_0.

[0102] Step 7: The terminal device decodes the SIB1 message.

[0103] The terminal device can receive SIB1 messages on the physical downlink shared channel (PDSCH) based on the information in DCI format 1_0, and decode the SIB1 messages.

[0104] Step 8: The terminal device decodes SIB messages other than SIB1 messages.

[0105] The SIB1 message includes information needed to decode other SIB messages, allowing the terminal device to decode other SIB messages based on this information to obtain complete network configuration and access information.

[0106] By following the steps described above, the terminal device can synchronize with the 5G NR cell and successfully access the network.

[0107] 2. The process of determining the community signage.

[0108] Regarding step two above, the synchronization signal can include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). The following describes the process by which the terminal device determines the cell identifier based on the PSS and SSS, including the following steps:

[0109] Step 9: The terminal device obtains PSS information by detecting the PSS.

[0110] The PSS includes the longest linear shift register sequence (MSS) of length 127, also known as the m-sequence. There are three types of m-sequences. The values ​​are 0, 1, and 2. Three m-sequences can be generated from the initial m-sequence through cyclic shifting. The PSS is sent periodically.

[0111] Typically, PSS can be used by terminal equipment to determine the boundaries of orthogonal frequency division multiplexing (OFDM) symbols (hereinafter referred to as "symbols") to achieve time synchronization. PSS can also be used by terminal equipment to estimate frequency deviations to achieve coarse frequency synchronization.

[0112] Step 10: The terminal device obtains SSS information through detection.

[0113] Among them, the terminal device can obtain the information... Detect SSS. SSS consists of a 127-bit Gold sequence. There are 1008 possible Gold sequences. These 1008 Gold sequences can be generated from an initial Gold sequence through cyclic shifting. SSS is also sent periodically.

[0114] Step 11: Terminal equipment according to and Determine the community identification.

[0115] Among them, community signage and It satisfies the following formula (1):

[0116]

[0117] in, The value range is from 0 to 335. The value range is from 0 to 2, therefore The value range is from 0 to 1007, which means that a maximum of 1008 cells can be uniquely identified.

[0118] 3. Time and frequency resources occupied by SSB.

[0119] SSB includes PSS, SSS, PBCH and the demodulation-reference signal (DM-RS) of PBCH (hereinafter referred to as DM-RS). It is mainly used by terminal equipment to obtain cell identifier during the initial access phase and to achieve downlink synchronization with 5G base station, i.e. next generation NodeB (gNB), in the time domain and frequency domain.

[0120] For example, Figure 1 This is a schematic diagram of the time-frequency resources occupied by SSBs in a 5G NR system. Table 1 shows the mapping relationship between the channels or signals included in an SSB and the time-frequency resources. Figure 1 As shown in Table 1, in the time domain, a single SSB can occupy four consecutive symbols numbered 0 to 3. The number and location of SSBs within a half-frame, or 5 milliseconds (ms), can be determined based on the subcarrier spacing and frequency range. Several SSB patterns exist, including cases A, B, C, D, and E. Different cases correspond to different subcarrier spacings and frequency ranges. Different subcarrier spacings can be applied to different frequency ranges and application scenarios. For example, a subcarrier spacing of 15 kHz or 30 kHz can be used in frequency range (FR) 1, while a subcarrier spacing of 120 kHz or 240 kHz can be used in FR2.

[0121] Combination Figure 1 As shown in Table 1, in the frequency domain, one SSB can occupy 20 resource blocks (RBs). One RB can contain 12 subcarriers, so 20 RBs can contain 240 subcarriers. The frequency domain location of the SSB can be anywhere on the transmission carrier, not necessarily aligned with an RB. The frequency location of the SSB can be configured by the upper-layer protocol stack to support a sparser search grid, thus facilitating SSB detection by the terminal device.

[0122] In the time domain, the PSS can occupy the symbol numbered 0; in the frequency domain, the PSS can occupy subcarriers numbered 56 to 182.

[0123] In the time domain, SSS can occupy symbol number 2; in the frequency domain, SSS can occupy subcarriers numbered 56 to 182.

[0124] 0 can occupy subcarriers numbered 0 to 55 on symbol number 0, and subcarriers numbered 183 to 239. 0 can also occupy subcarriers numbered 48 to 55 on symbol number 2, and subcarriers numbered 183 to 191.

[0125] The PBCH can occupy the entire symbols numbered 1 and 3; in other words, the PBCH can occupy all subcarriers on symbols numbered 1 and 3. Furthermore, Figure 1 The PBCH in the symbol can also occupy subcarriers numbered 0 to 47 on symbol number 2, as well as subcarriers numbered 192 to 239.

[0126] DM-RS can occupy subcarriers numbered 0+v, 4+v, 8+v, ..., 236+v on symbols numbered 1 and 3. DM-RS can also occupy subcarriers numbered 0+v, 4+v, 8+v, ..., 44+v on symbol number 2, and subcarriers numbered 192+v, 196+v, ..., 236+v. This serves as the identifier for the cell. Therefore, the value of v can be 0, 1, 2, or 3.

[0127] Table 1

[0128]

[0129] Furthermore, Figure 2 This diagram illustrates the frequency domain resources occupied by DM-RS in a 5G NR system. DM-RS are distributed at specific intervals across the frequency domain resources occupied by PBCH. DM-RS can be used for channel estimation to provide channel state information. Figure 2 The numbers 0-11 in the table represent the subcarrier numbers within an RB. Figure 2 The symbols in the value can be numbered 1, 2, or 3. The frequency domain position occupied by the DM-RS is determined by the value of v. Specifically, the starting subcarrier of the DM-RS is numbered v. Figure 2 As shown, each set of four subcarriers includes one DM-RS. When v = 0, the starting subcarrier of the DM-RS is numbered 0; when v = 1, the starting subcarrier of the DM-RS is numbered 1; when v = 2, the starting subcarrier of the DM-RS is numbered 2; and when v = 3, the starting subcarrier of the DM-RS is numbered 3.

[0130] 4. Characteristics of SSB burst sets.

[0131] Feature 1: SSB burst sets are periodic.

[0132] The period of the SSB burst set can be configured through the higher-layer parameter `ssb-PeriodicityServingCell`. The period of the SSB burst set can be 5ms, 10ms, 20ms, 40ms, 80ms, or 160ms. In other words, the SSB burst set will repeat at the above periods or time intervals. The period of the SSB burst set can be carried on the PBCH.

[0133] Feature 2: SSB burst sets can be used for beam scanning.

[0134] Within the period of an SSB burst, a base station can transmit multiple SSBs. Each SSB corresponds to a beam direction, allowing the base station to broadcast beam signals in different directions. Typically, these multiple SSBs carry the same information.

[0135] Based on characteristic two above, the time-frequency structure design of the SSB allows the SSB to transmit at different frequencies and times to support beam scanning technology, enhance cell coverage, and improve signal demodulation capabilities. Within each SSB burst cycle, the periodic transmission of the SSB and its transmission in multiple beam directions enable terminal equipment to combine signals by receiving SSBs from different directions, thereby improving signal reception quality and ultimately enhancing signal demodulation capabilities.

[0136] Feature 3: The number of SSBs included in the SSB burst set is related to the SSB pattern.

[0137] The number of SSBs included in an SSB burst set depends on the specific configuration, including the subcarrier spacing. For example, the number of SSBs included in an SSB burst set varies depending on the case. Within a half-frame, there can be 4, 8, or 64 SSBs.

[0138] 5. The process of determining the beam index.

[0139] The beam index in the embodiments of this application may also be referred to as the SSB index.

[0140] When an SSB burst set includes L=4 or 8 SSBs, the beam index can be carried by the DM-RS, so that the terminal device can obtain the beam index without decoding the PBCH.

[0141] With L=64, the three least significant bits (LSB) of the beam index can be carried via the DM-RS, while the most significant bit (MSB) is carried on the PBCH. Therefore, the terminal device needs to decode the PBCH to obtain the complete beam index.

[0142] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. 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 is merely a description of 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. Furthermore, to facilitate a clear description of the technical solutions in 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 substantially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different.

[0143] Figure 3 This is a schematic diagram of the architecture of the communication system 1000 used in an embodiment of this application. Figure 3 As shown, the communication system includes a wireless access network 100 and a core network 200. Optionally, the communication system 1000 may also include an Internet 300. The wireless access network 100 may include at least one wireless access network device (such as...). Figure 3 110a and 110b in the above), may also include at least one terminal device (such as Figure 3 (Referring to 120a-120j in the original text). Terminal devices connect wirelessly to wireless access network (WLAN) devices, which in turn connect wirelessly or via wired connections to the core network. The core network devices and WLAN devices can be independent physical devices, or they can integrate the functions of the core network devices and the logical functions of the WLAN devices onto a single physical device. Alternatively, a single physical device can integrate some core network device functions and some WLAN device functions. Terminal devices and WLAN devices can be interconnected via wired or wireless connections. Figure 3 This is just a schematic diagram. The communication system may also include other network devices, such as wireless repeaters and wireless backhaul devices. Figure 3 It is not shown in the middle.

[0144] Radio access network (RAN) equipment is the access device that enables terminal devices to wirelessly access a communication system. RAN equipment can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a gNB in ​​a 5G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system. In another possible scenario, multiple RAN nodes collaborate to assist the terminal in achieving wireless access, with different RAN nodes implementing some of the functions of a base station. For example, RAN nodes can be central units (CU), distributed units (DU), CU-control plane (CP), CU-user plane (UP), or radio units (RU). CU and DU can be set up separately or included in the same network element, such as a baseband unit (BBU). RU can be included in radio frequency equipment or radio frequency units, such as in a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0145] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meaning. For example, in an open RAN (ORAN) system, CU can also be called O-CU (open CU), DU can also be called O-DU, CU-CP can also be called O-CU-CP, CU-UP can also be called O-CU-UP, and RU can also be called O-RU. For ease of description, this application uses CU, CU-CP, CU-UP, DU, and RU as examples. Any of the units among CU (or CU-CP, CU-UP), DU, and RU in this application can be implemented by a software module, a hardware module, or a combination of software and hardware modules. The embodiments of this application can be implemented by DU or RU.

[0146] Wireless access network equipment can be macro base stations (such as...) Figure 3 110a in the text), can also be a micro base station or an indoor station (such as... Figure 3110b) in the text can also be a relay node or a donor node, etc. The embodiments of this application do not limit the specific technology or device form used in the wireless access network equipment. For ease of description, the following description uses a base station as an example of a wireless access network device.

[0147] The terminal device also has wireless transceiver capabilities, enabling it to send signals to or receive signals from a base station. The terminal device can also be referred to as a terminal, user equipment (UE), mobile station, mobile terminal device, etc. Terminal devices can be widely used in various scenarios, such as environmental IoT, device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, intelligent transportation, smart cities, etc. Terminal devices can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, etc. The embodiments of this application do not limit the specific technologies or device forms used in the terminal devices.

[0148] Antenna arrays can be deployed separately on the terminal device and the base station side to form a multi-antenna system. For example, in future mobile communication systems, the antenna array on the base station side can consist of 1,000 antennas, while the antenna array on the terminal device side can consist of 30 antennas.

[0149] Base stations and terminal equipment can be fixed or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can be deployed on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of the base stations and terminal equipment.

[0150] The roles of base stations and terminal devices can be relative, for example, Figure 3 The helicopter or drone 120i can be configured as a mobile base station. For terminal devices 120j that access the wireless access network 100 via 120i, terminal device 120i is a base station; however, for base station 110a, 120i is a terminal device, meaning that 110a and 120i communicate via a wireless air interface protocol. Of course, 110a and 120i can also communicate via a base station-to-base station interface protocol; in this case, 120i is also a base station relative to 110a. Therefore, both base stations and terminal devices can be collectively referred to as communication devices. Figure 3The 110a and 110b in the text can be referred to as communication devices with base station functions. Figure 3 The 120a-120j in the text can be referred to as communication devices with terminal equipment functions.

[0151] Communication between base stations and terminal devices, between base stations, and between terminal devices can be conducted using licensed spectrum, unlicensed spectrum, or both simultaneously. Communication can be conducted using spectrum below 6 GHz, spectrum above 6 GHz, or both simultaneously. The embodiments of this application do not limit the spectrum resources used for wireless communication.

[0152] In the embodiments of this application, the functions of the base station can be executed by modules (such as chips) within the base station, or by a control subsystem that includes base station functions. This control subsystem, including base station functions, can be a control center in the aforementioned application scenarios such as smart grids, industrial control, intelligent transportation, and smart cities. Similarly, the functions of the terminal device can be executed by modules (such as chips or modems) within the terminal device, or by a device that includes terminal device functions.

[0153] For example, the network device provided in this application embodiment can be a wireless access network node, such as... Figure 3 In the case of 110a or 110b, the terminal device provided in this application embodiment can be a terminal equipment, such as... Figure 3 Any one of 120a-120j.

[0154] The functions of the network device or terminal device involved in this application can be implemented by one device, or by multiple devices, or by one or more functional modules within one device, or by one or more chips, or by a system on a chip (SOC) or chip system. A chip system can be composed of chips or include chips and other discrete devices. The embodiments of this application do not specifically limit this.

[0155] It is understood that the above functions can be network elements in hardware devices, software functions running on dedicated hardware, a combination of hardware and software, or virtualization functions instantiated on a platform (e.g., a cloud platform).

[0156] For example, the relevant functions of the network device or terminal device in the embodiments of this application can be achieved through... Figure 4 This is achieved through the communication device 110.

[0157] Figure 4 A schematic diagram of a possible communication device 110 is shown. It will be understood that the communication device 110 includes means of the necessary form, such as modules, units, elements, circuits, or interfaces, to be appropriately configured together to perform this solution. The communication device 110 can be a transmitting device or a receiving device, or a component (e.g., a chip) within these devices, to implement the methods described in the following method embodiments. The communication device 110 includes one or more processors 111. The processor 111 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, while the central processing unit can be used to control the communication device (e.g., a transmitting device, a receiving device, or a chip), execute software programs, and process data from the software programs.

[0158] Optionally, in one design, the processor 111 may include a program 113 (sometimes also referred to as code or instructions), which can be executed on the processor 111 to cause the communication device 110 to perform the methods described in the embodiments below. In yet another possible design, the communication device 110 includes circuitry (…). Figure 4 (Not shown).

[0159] Optionally, the communication device 110 may include one or more memories 112 storing a program 114 (sometimes referred to as code or instructions), which can be run on the processor 111 to cause the communication device 110 to perform the methods described in the following method embodiments.

[0160] Optionally, the processor 111 and / or memory 112 may include AI modules 117 and 118, which are used to implement AI-related functions. The AI ​​modules can be implemented through software, hardware, or a combination of both. For example, the AI ​​module may include a RAN intelligence controller (RIC) module. For example, the AI ​​module may be a near real-time RIC or a non-real-time RIC.

[0161] Optionally, the processor 111 and / or memory 112 may also store data. The processor and memory may be configured separately or integrated together.

[0162] Optionally, the communication device 110 may further include a transceiver 115 and / or an antenna 116. The processor 111, sometimes referred to as a processing unit, controls the communication device (e.g., a transmitting or receiving device). The transceiver 115, sometimes referred to as a transceiver unit, transceiver, transceiver circuit, or transceiver, is used to realize the transmission and reception functions of the communication device through the antenna 116.

[0163] also, Figure 4 The structural composition shown does not constitute a limitation on the communication device, except... Figure 4 In addition to the components shown, the communication device may include more or fewer components than illustrated, or combine certain components, or have different component arrangements.

[0164] The following will combine Figures 1 to 4 The communication method provided in the embodiments of this application will be described in detail.

[0165] In the embodiments of this application, "at least one" and "one or more" can be used interchangeably, and will not be repeated hereafter.

[0166] Figure 5 A flowchart of a communication method provided in an embodiment of this application is shown, including the following steps:

[0167] Step S501: The network device sends multiple SSBs to the terminal device at a first time; wherein each SSB includes a different cyclic shift corresponding to the SSS sequence. Accordingly, the terminal device receives the multiple SSBs from the network device at a first time.

[0168] In this embodiment, the SSS sequence is obtained by cyclically shifting the root sequence. The root sequence corresponding to the SSS sequence included in each SSB can be the same. Since the terminal device can... We obtain the root sequence; therefore, the same root sequence corresponds to... The values ​​are the same, but conversely, different root sequences correspond to different values. The values ​​are different.

[0169] Step S502: The terminal device determines the index of multiple SSBs according to the first beam index; wherein, the first beam index is determined according to the multiple SSS sequences included in the multiple SSBs.

[0170] In the communication method provided in this application embodiment, multiple SSBs can be transmitted simultaneously (i.e., at the first time), thereby reducing beam scanning latency and improving the efficiency of initial access for terminal devices. Furthermore, the communication method provided in this application embodiment clarifies the method for determining the index of multiple SSBs, thereby enabling the receiving end to detect the SSBs.

[0171] Optionally, the first beam index can be determined as follows: the terminal device obtains a first correspondence; wherein the first correspondence is the correspondence between cyclic shift and the third beam index, and the third beam index includes the first beam index; the terminal device determines the third beam index corresponding to the first cyclic shift as the first beam index based on the first correspondence, the first cyclic shift corresponds to a peak value, and the peak value is the correlation peak value between the multiple SSS sequences included in the multiple SSBs and the first root sequence, and the first root sequence belongs to the root sequence set. In this scheme, the terminal device can correlate the multiple SSS sequences with the root sequences in the root sequence set to obtain the first root sequence and the first beam index.

[0172] In this embodiment of the application, the first root sequence can be understood as the root sequence corresponding to multiple SSSs obtained or parsed by the terminal device. After receiving multiple SSBs, the terminal device can correlate the multiple SSS sequences included in the multiple SSBs with the root sequences in the root sequence set, and take the root sequence that can obtain multiple correlation peaks as the first root sequence.

[0173] For example, the root sequence set includes root sequence 1 and root sequence 2. If multiple SSS sequences are correlated with root sequence 1 to obtain multiple peaks, but not with root sequence 2 to obtain any peaks, then the terminal device can use root sequence 1 as the first root sequence.

[0174] After determining the first sequence, the terminal device can determine the first cyclic shift corresponding to the peak value. Then, based on the first correspondence, the terminal device can determine the third beam index corresponding to the first cyclic shift as the first beam index.

[0175] For example, such as Figure 6 As shown, when X is 7, the third beam index can be #0 to #7. The first correspondence is: third beam index #0 corresponds to cyclic shift (CS) #0; third beam index #1 corresponds to cyclic shift #1; third beam index #2 corresponds to cyclic shift #2; and so on. The third beam indexes #0 to #7 correspond to... The values ​​are the same. Different cyclic shifts correspond to different peak positions. The terminal device can determine the first beam index by the correlation peak positions of multiple SSS sequences with the first sequence.

[0176] Specifically, assuming that the correlation peaks between multiple SSS sequences and the first root sequence are two, the terminal device can determine that these two peaks correspond to cyclic shift #0 and cyclic shift #2, respectively, meaning the first cyclic shift is cyclic shift #0 and cyclic shift #2. Then, based on the first correspondence, the terminal device can determine that cyclic shift #0 corresponds to the third beam index #0, and cyclic shift #2 corresponds to the third beam index #2, meaning the first beam indices are #0 and #2.

[0177] In other words, the first beam index can be part or all of the third beam index.

[0178] Optionally, the multiple SSBs include a first DM-RS sequence; the terminal device determines the indexes of the multiple SSBs based on a first beam index, including: the terminal device determines the indexes of the multiple SSBs based on a first beam index and a second beam index; wherein the second beam index is determined by the terminal device based on the first DM-RS sequence. In this scheme, in addition to the first beam index, the second beam index can also be used to determine the indexes of the multiple SSBs. Compared to the current scheme where the terminal device only determines the indexes of the SSBs based on the second beam index, this scheme can identify more SSBs. For example, if there are 8 second beam indices and 8 first beam indices, then the prior art can identify 8 SSBs, while this scheme can identify (8×8=) 64 SSBs.

[0179] The first DM-RS sequence can be obtained by the terminal device from the first time-frequency resource based on the second cyclic shift detection DM-RS sequence. The first time-frequency resource is determined by the terminal device based on multiple SSS sequences included in multiple SSBs, and the second cyclic shift is determined by the terminal device based on the first cyclic shift. In this scheme, the first time-frequency resource is related to the value of v, and the value of v is related to... Related, and It is determined based on multiple SSS sequences. That is, as... Figure 6 As shown, the terminal device according to Determine the first time-frequency resource. The first time-frequency resource can be calculated using formula (1). The specific method for determining the first time-frequency resource can be found in the preceding section on the method for determining the time-frequency domain resources occupied by the DM-RS, and will not be elaborated further. Since there is a correspondence between the first cyclic shift and the first beam index, the second cyclic shift can also be described as being determined by the terminal device based on the first beam index. The terminal device can determine the second cyclic shift based on the first cyclic shift or the first beam index. Specifically, the terminal device can determine the second cyclic shift through formula calculation or lookup table.

[0180] For example, the second cyclic shift corresponding to the same first beam index is the same as the first cyclic shift.

[0181] Optionally, the second beam index can be determined as follows: the terminal device acquires a second correspondence; wherein the second correspondence is the correspondence between the root sequence corresponding to the DM-RS sequence and the fourth beam index, and the fourth beam index includes the second beam index; the terminal device determines the fourth beam index corresponding to the root sequence corresponding to the first DM-RS sequence as the second beam index based on the second correspondence. In this scheme, the specific process by which the terminal device acquires the root sequence corresponding to the first DM-RS sequence can be found in existing technology and will not be elaborated further. Figure 6 As shown, the terminal device can determine the second beam index based on the root sequence corresponding to the first DM-RS sequence.

[0182] The second beam index can be understood as indicating the group to which the multiple SSBs received by the terminal device belong. For example, the fourth beam index can be #0 and #1, and the second beam index can be #0 or #1. When the third beam index is #0 to #7, the second beam index can be used to indicate whether the multiple SSBs received by the terminal device belong to the first 8 SSBs or the last 8 SSBs. In other words, before transmitting some or all of the 16 SSBs, the network device can divide the 16 SSBs into two groups, each containing 8 SSBs. Some or all of the 8 SSBs belonging to the same group can be transmitted simultaneously; that is, some or all of the 8 SSBs belonging to the first group can be transmitted at the first time, and some or all of the 8 SSBs belonging to the second group can be transmitted at the second time.

[0183] Optionally, the indices of multiple SSBs are the sum of a first product and a first beam index, where the first product is the product of the number of third beam indices and the second beam index. For example, when the first beam indices are #0 and #2, and the number of third beam indices is 8 (i.e., the third beam indices are #0 to #7), if the second beam index is #0, then the indices of the two SSBs are #0 and #2; if the second beam index is #1, then the indices of the two SSBs are #8 and #10.

[0184] like Figure 6 As shown, after determining the indices of multiple SSBs, the terminal device can detect or decode the PBCH to obtain the MIB message. The terminal device can then access the network based on the MIB message.

[0185] In the above Figure 5 and Figure 6 In the illustrated embodiment, the cyclic shifts corresponding to the SSS sequences included in each SSB are different. In one possible implementation, the cyclic shifts and symbol numbers corresponding to the SSS sequences included in each SSB are different, such as... Figure 7As shown. Because a symbol numbering dimension is introduced on top of the cyclic shift, more SSBs can be identified. Figure 7 This may include the following steps:

[0186] Step S701: The network device sends multiple SSBs to the terminal device at the first moment; wherein, each SSB includes a different cyclic shift and symbol number corresponding to the SSS sequence. Accordingly, the terminal device receives the multiple SSBs from the network device at the first moment.

[0187] In this context, the root sequences corresponding to the SSS sequences included in each SSB can be the same, i.e. The values ​​can be the same.

[0188] In the prior art, the SSS sequence corresponds to one symbol, namely symbol 2. In the embodiments of this application, the SSS sequence can correspond to multiple symbols, and the cyclic shifts corresponding to the multiple SSS sequences on each symbol are different. The multiple symbols can be, for example, symbol 2, symbol 3, and symbol 4, so the mapping relationship between the channel or signal included in the SSB and the time-frequency resources can be as shown in Table 2.

[0189] Table 2

[0190]

[0191] Step S702: The terminal device determines the index of multiple SSBs based on the first beam index; wherein, the first beam index is determined based on the multiple SSS sequences included in the multiple SSBs.

[0192] Optionally, the first beam index can be determined as follows: the terminal device acquires a third correspondence; wherein the third correspondence is the correspondence between the symbol number, the cyclic shift, and the third beam index, and the third beam index includes the first beam index; the terminal device determines the third beam index corresponding to the first symbol number and the first cyclic shift as the first beam index based on the third correspondence, wherein at least one SSS sequence on the symbol corresponding to the first symbol number has a correlation peak with the first root sequence, the first root sequence belongs to the root sequence set, and the first cyclic shift corresponds to the correlation peak. In this scheme, on each symbol, the terminal device can correlate at least one SSS sequence with the root sequences in the root sequence set to obtain the first root sequence and the first beam index.

[0193] On each symbol, the terminal device can perform Figure 5 The method in the illustrated embodiment determines the first root sequence and the first cyclic shift. Then, the terminal device can determine the third beam index corresponding to the first symbol number and the first cyclic shift as the first beam index based on the third correspondence.

[0194] For example, such as Figure 8 As shown, the third beam index can be #0 to #5, and the third correspondence can be as follows: third beam index #0 corresponds to cyclic shift #0 and symbol 2; third beam index #1 corresponds to cyclic shift #1 and symbol 2; third beam index #2 corresponds to cyclic shift #0 and symbol 3; third beam index #3 corresponds to cyclic shift #1 and symbol 3; third beam index #4 corresponds to cyclic shift #0 and symbol 4; third beam index #5 corresponds to cyclic shift #1 and symbol 4. The third beam indexes #0 to #5 correspond to... The values ​​are the same. On the same symbol, different cyclic shifts correspond to different peak positions. On each symbol, the terminal device can determine the first beam index by the correlation peak position between at least one SSS sequence and the first root sequence.

[0195] The first beam index can be part or all of the third beam index.

[0196] Optionally, in addition to the first beam index, the second beam index can also be used to determine the indices of multiple SSBs. For a description of how the terminal device determines the second beam index, the indices of multiple SSBs, and how the terminal device detects the DM-RS sequence to obtain the first DM-RS sequence, please refer to [link to relevant documentation]. Figure 5 and Figure 6 The relevant descriptions in the illustrated embodiments will not be repeated.

[0197] In the above Figure 5 and Figure 6 In the illustrated embodiment, each SSB includes a different cyclic shift corresponding to its SSS sequence. In the above... Figure 7 and Figure 8 In the illustrated embodiment, each SSB includes a different cyclic shift and sign number corresponding to its SSS sequence. In one possible implementation, each SSB includes a different root sequence corresponding to its SSS sequence, such as... Figure 9 As shown. Figure 9 This may include the following steps:

[0198] Step S901: The network device sends multiple SSBs to the terminal device at the first moment; wherein, each SSB includes a different root sequence corresponding to the SSS sequence. Accordingly, the terminal device receives the multiple SSBs from the network device at the first moment.

[0199] The cyclic shifts corresponding to the SSS sequences included in each SSB can be the same.

[0200] Step S902: The terminal device determines the index of multiple SSBs based on the first beam index; wherein, the first beam index is determined based on the multiple SSS sequences included in the multiple SSBs.

[0201] Optionally, the first beam index can be determined as follows: the terminal device obtains a fourth correspondence; wherein the fourth correspondence is the correspondence between the first value and the third beam index, the first value is used to generate the root sequence, the third beam index includes the first beam index, and each third beam index corresponds to multiple first values; the terminal device determines the third beam index corresponding to the second value as the first beam index according to the fourth correspondence, the first value includes the second value, the second value corresponds to the first root sequence, the first root sequence has a correlation peak with multiple SSS sequences included in multiple SSBs, and the first root sequence belongs to the root sequence set. In this scheme, the terminal device can correlate multiple SSS sequences with each root sequence in the root sequence set to obtain the first root sequence and the first beam index.

[0202] In this embodiment, the first value can be any The second value can be part or all of the first value.

[0203] For example, such as Figure 10 As shown, the third beam index can be #0 to #3, that is, all... The values ​​can be divided into 4 groups. In one possible implementation, the grouping can be based on the cross-correlation properties of the root sequences. That is, multiple root sequences with strong cross-correlation properties correspond to... The values ​​are grouped into the same group; or, the cross-correlation characteristics of root sequences generated based on multiple first values ​​corresponding to the same third beam index are strong; or, the cross-correlation characteristics of root sequences generated based on two first values ​​corresponding to the same third beam index are stronger than the cross-correlation characteristics of root sequences generated based on two first values ​​corresponding to different third beam indices.

[0204] For example, such as Figure 10 As shown, the fourth correspondence can be: the third beam index is #0, corresponding to... The values ​​are 0, 4, 8, 12, ...; the third beam index is #1, corresponding to... The values ​​are 1, 5, 9, 13, ...; the third beam index is #2, corresponding to... The values ​​are 2, 6, 10, 14, ...; the third beam index is #2, corresponding to... The value of is 3, 7, 11, 15, ... The terminal device can determine the first beam index by the correlation peak between multiple SSS sequences and each root sequence in the root sequence set. If multiple SSS sequences have a correlation peak with the first root sequence, it indicates that the first root sequence corresponds to one of the received multiple SSS sequences; if multiple SSS sequences do not have a correlation peak with the second root sequence, it indicates that the second root sequence does not correspond to any of the received multiple SSS sequences.

[0205] Combination Figure 10Assume that the first beam indices corresponding to the multiple SSBs received by the terminal device are #0 to #3, and the multiple SSBs correspond to... The values ​​are 0, 1, 2, and 3. After receiving multiple SSBs, the terminal device combines the multiple SSB sequences with the root sequence set. Correlate the corresponding root sequences to obtain the peak value; then the first root sequence is... The corresponding root sequence has a second value of 0, which corresponds to the third beam index #0, thus making the first beam index #0; the terminal device can also combine multiple SSS sequences with the root sequence set. Correlate the corresponding root sequences to obtain the peak value; then the first root sequence is... The corresponding root sequence has a second value of 1, which corresponds to a third beam index of #1, thus making the first beam index #1. Similarly, the terminal device can repeatedly perform sequence correlation operations to determine the first root sequence and the first beam index. For example, the terminal device correlates multiple SSS sequences with the root sequence set... If no peak is obtained when the corresponding root sequence is correlated, then... The corresponding root sequence is not the first root sequence, and 5 is not the second value.

[0206] Optionally, in addition to the first beam index, the second beam index can also be used to determine the indices of multiple SSBs. For a description of how the terminal device determines the second beam index and how the terminal device determines the indices of multiple SSBs, please refer to [link to relevant documentation]. Figure 5 and Figure 6 The relevant descriptions in the illustrated embodiments will not be repeated.

[0207] The first DM-RS sequence used to determine the second beam index can be obtained by the terminal device based on the second cyclic shift detection DM-RS sequence on the first time-frequency resource. The first time-frequency resource is determined by the terminal device based on multiple SSS sequences included in multiple SSBs, and the second cyclic shift is determined by the terminal device based on the first beam index. In this scheme, the terminal device can specifically determine the second cyclic shift through formula calculation or lookup table.

[0208] Optionally, the first time-frequency resource is determined based on multiple SSS sequences included in multiple SSBs, including: the first time-frequency resource is determined based on the cell identifier, the cell identifier is determined based on a second value, and the second value is determined based on multiple SSS sequences included in multiple SSBs;

[0209] Among them, the community signage Second value The following formula (2) is satisfied:

[0210]

[0211] Where M represents the number of third beam indices, This indicates rounding down. It is determined based on multiple PSSs included in multiple SSBs. In this scheme, the first time-frequency resource is related to the value of v, and the value of v is related to... Related, and It was determined based on multiple SSS sequences. Figure 10 In the example shown, the terminal device according to Determine the first time-frequency resource. It can be calculated using the above formula (2). Where M = 4, the specific method for determining the first time-frequency resource can be found in the preceding section on the method for determining the time-frequency domain resources occupied by DM-RS. The specific method for determining this can be found in existing technologies and will not be elaborated here.

[0212] It should be understood that the terminal device can execute the communication method provided in the embodiments of this application. The terminal device can be a terminal equipment, or a module applied in the terminal equipment to realize its communication function, such as a chip, chip system, module, or component. In the subsequent description of the communication method and corresponding technical effects, the terminal device is used as an example of the executing subject, but this does not constitute any limitation on the executing subject.

[0213] It should be understood that a network device can execute the communication method provided in the embodiments of this application. The network device can be a network equipment, or a module applied in a network equipment to realize its communication function, such as a chip, a chip system, a module, or a component. In the subsequent description of the communication method and its corresponding technical effects, the network device is used as an example of the executing entity, but this does not constitute any limitation on the executing entity.

[0214] It is understood that, in order to achieve the above-mentioned functions, network devices or terminal devices include hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, based on the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0215] This application embodiment can divide the network device or terminal device into functional modules according to the above method embodiments. For example, each function can be divided into its own functional modules, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. It should be noted that the module division in this application embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods.

[0216] For example, the terminal device in the embodiments of this application can adopt Figure 11 The communication device 1100 shown is implemented in the form of a transceiver module 1101 and a determination module 1102. Optionally, the communication device 1100 may further include an acquisition module 1103 and a detection module 1104. The communication device 1100 is used to implement the above. Figures 5 to 10 The terminal device functions as shown in the method embodiment.

[0217] For example, when the communication device 1100 is used to implement Figure 5 , Figure 7 or Figure 9 In the method embodiment shown, the terminal device functions as follows: transceiver module 1101 is used to receive multiple SSBs at a first time; determination module 1102 is used to determine the index of the multiple SSBs according to the first beam index.

[0218] For a more detailed description of the aforementioned transceiver module 1101, determination module 1102, acquisition module 1103, and detection module 1104, please refer to [the relevant documentation / reference]. Figures 5 to 10 The relevant descriptions in the method embodiments shown.

[0219] In this embodiment, the communication device 1100 is presented in an integrated manner, divided into various functional modules. Here, "module" can refer to a specific ASIC, circuit, processor and memory executing one or more software or firmware programs, integrated logic circuit, and / or other devices that can provide the above-mentioned functions.

[0220] In a simplified embodiment, those skilled in the art will recognize that the communication device 1100 can employ... Figure 4 The communication device 110 shown is in the form of [example device].

[0221] for example, Figure 4 The processor 111 in the communication device 110 shown can execute the communication method in the above-described method embodiment by calling computer execution instructions stored in the memory 112. Specifically, Figure 11 Some functions / implementation processes of the transceiver module 1101 in the middle can be achieved through... Figure 4 This is achieved through transceiver 115. Figure 11 Part of the function / implementation process of the determination module 1102 or the detection module 1104 can be achieved through... Figure 4 The processor 111 in the middle is used for implementation. In one possible implementation, some functions / implementation processes of the acquisition module 1103 can be obtained via... Figure 4 The transceiver 115 in the middle is used for implementation. In another possible implementation, some functions / implementation processes of the acquisition module 1103 can be achieved through the interface between layers within the communication device. Figure 11 (not shown in the image) to achieve this.

[0222] Since the communication device 1100 provided in this embodiment can execute the above-described communication method, the technical effects it can achieve can be referred to the above-described method embodiments, and will not be repeated here.

[0223] It should be noted that one or more of the above modules or units can be implemented by software, hardware, or a combination of both. When any of the above modules or units are implemented by software, the software exists as computer program instructions and is stored in memory. The processor can be used to execute the program instructions and implement the above method flow. The processor can be built into a SoC or ASIC, or it can be a separate semiconductor chip. In addition to the core that executes the software instructions for computation or processing, the processor may further include necessary hardware accelerators, such as field-programmable gate arrays (FPGAs), programmable logic devices (PLDs), or logic circuits that implement dedicated logic operations.

[0224] When the above modules or units are implemented in hardware, the hardware can be any one or any combination of a CPU, microprocessor, digital signal processing (DSP) chip, microcontroller unit (MCU), artificial intelligence processor, ASIC, SoC, FPGA, PLD, application-specific digital circuit, hardware accelerator, or non-integrated discrete device, which can run the necessary software or perform the above method flow independently of software.

[0225] Optionally, embodiments of this application also provide a chip system, including: at least one processor and an interface, wherein the at least one processor is coupled to a memory via the interface, and when the at least one processor executes a computer program or instructions in the memory, the method in any of the above method embodiments is executed. In one possible implementation, the communication device further includes a memory. Optionally, the chip system may be composed of chips, or may include chips and other discrete devices; embodiments of this application do not specifically limit this.

[0226] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software programs, implementation can be, in whole or in part, in the form of a computer program product. This computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device containing one or more servers, data centers, etc., that can be integrated with the medium. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state disks, SSDs), etc.

[0227] Although this application has been described herein in conjunction with various embodiments, those skilled in the art, by reviewing the accompanying drawings, disclosure, and appended claims, will understand and implement other variations of the disclosed embodiments in carrying out the claimed application. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit can implement several functions listed in the claims. While different dependent claims may recite certain measures, this does not mean that these measures cannot be combined to produce good results.

[0228] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of this application as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from the spirit and scope of this application. Thus, if such modifications and modifications of this application fall within the scope of the claims of this application and their equivalents, this application is also intended to include such modifications and modifications.

Claims

1. A communication method, characterized in that, include: Multiple synchronization signals and physical broadcast channel blocks (SSBs) are received in the first instance; each SSB includes an auxiliary synchronization signal (SSS) sequence with a different cyclic shift. The indices of the plurality of SSBs are determined according to a first beam index; wherein the first beam index is determined according to the plurality of SSS sequences included in the plurality of SSBs.

2. The method according to claim 1, characterized in that, The method further includes: Obtain the first correspondence; wherein the first correspondence is the correspondence between cyclic shift and third beam index, and the third beam index includes the first beam index; Based on the first correspondence, the third beam index corresponding to the first cyclic shift is determined as the first beam index. The first cyclic shift corresponds to the peak value, which is the correlation peak value between the multiple SSS sequences included in the multiple SSBs and the first root sequence. The first root sequence belongs to the root sequence set.

3. The method according to claim 1 or 2, characterized in that, The plurality of SSBs includes a first demodulation reference signal (DM-RS) sequence; determining the index of the plurality of SSBs according to the first beam index includes: The indices of the plurality of SSBs are determined based on the first beam index and the second beam index; wherein the second beam index is determined based on the first DM-RS sequence.

4. The method according to claim 3, characterized in that, The index of the plurality of SSBs is the sum of the first product and the first beam index, wherein the first product is the product of the number of the third beam index and the second beam index.

5. The method according to claim 2, characterized in that, The method further includes: On a first time-frequency resource, a DM-RS sequence is detected according to a second cyclic shift; wherein the first time-frequency resource is determined based on a plurality of SSS sequences included in the plurality of SSBs, and the second cyclic shift is determined based on the first cyclic shift.

6. The method according to claim 5, characterized in that, The second cyclic shift corresponding to the same first beam index is the same as the first cyclic shift.

7. The method according to claim 3 or 4, characterized in that, The method further includes: Obtain the second correspondence; wherein, the second correspondence is the correspondence between the root sequence corresponding to the DM-RS sequence and the fourth beam index, and the fourth beam index includes the second beam index; Based on the second correspondence, the fourth beam index corresponding to the root sequence corresponding to the first DM-RS sequence is determined as the second beam index.

8. A communication method, characterized in that, include: Multiple synchronization signals and physical broadcast channel blocks (SSBs) are received in the first instance; each SSB includes an auxiliary synchronization signal (SSS) sequence with different cyclic shifts and symbol numbers. The indices of the plurality of SSBs are determined according to a first beam index; wherein the first beam index is determined according to the plurality of SSS sequences included in the plurality of SSBs.

9. The method according to claim 8, characterized in that, The method further includes: Obtain the third correspondence; wherein the third correspondence is the correspondence between symbol number, cyclic shift and third beam index, and the third beam index includes the first beam index; According to the third correspondence, the third beam index corresponding to the first symbol number and the first cyclic shift is determined as the first beam index. At least one SSS sequence on the symbol corresponding to the first symbol number has a correlation peak with the first root sequence. The first root sequence belongs to the root sequence set. The first cyclic shift corresponds to the correlation peak.

10. The method according to claim 8 or 9, characterized in that, The plurality of SSBs includes a first demodulation reference signal (DM-RS) sequence; determining the index of the plurality of SSBs according to the first beam index includes: The indices of the plurality of SSBs are determined based on the first beam index and the second beam index; wherein the second beam index is determined based on the first DM-RS sequence.

11. The method according to claim 10, characterized in that, The index of the plurality of SSBs is the sum of the first product and the first beam index, wherein the first product is the product of the number of the third beam index and the second beam index.

12. The method according to claim 9, characterized in that, The method further includes: On a first time-frequency resource, a DM-RS sequence is detected according to a second cyclic shift; wherein the first time-frequency resource is determined based on a plurality of SSS sequences included in the plurality of SSBs, and the second cyclic shift is determined based on the first cyclic shift.

13. The method according to claim 12, characterized in that, The second cyclic shift corresponding to the same first beam index is the same as the first cyclic shift.

14. The method according to claim 10 or 11, characterized in that, The method further includes: Obtain the second correspondence; wherein, the second correspondence is the correspondence between the root sequence corresponding to the DM-RS sequence and the fourth beam index, and the fourth beam index includes the second beam index; Based on the second correspondence, the fourth beam index corresponding to the root sequence corresponding to the first DM-RS sequence is determined as the second beam index.

15. A communication method, characterized in that, include: Multiple synchronization signals and physical broadcast channel blocks (SSBs) are received in the first instance; each SSB includes an auxiliary synchronization signal (SSS) sequence with a different root sequence. The indices of the plurality of SSBs are determined according to a first beam index; wherein the first beam index is determined according to the plurality of SSS sequences included in the plurality of SSBs.

16. The method according to claim 15, characterized in that, The method further includes: Obtain the fourth correspondence; wherein the fourth correspondence is the correspondence between the first value and the third beam index, the first value is used to generate the root sequence, the third beam index includes the first beam index, and each third beam index corresponds to multiple first values; According to the fourth correspondence, the third beam index corresponding to the second value is determined as the first beam index. The first value includes the second value. The second value corresponds to the first root sequence. The first root sequence has a correlation peak with the multiple SSS sequences included in the multiple SSBs. The first root sequence belongs to the root sequence set.

17. The method according to claim 15 or 16, characterized in that, The plurality of SSBs includes a first demodulation reference signal (DM-RS) sequence; determining the index of the plurality of SSBs according to the first beam index includes: The indices of the plurality of SSBs are determined based on the first beam index and the second beam index; wherein the second beam index is determined based on the first DM-RS sequence.

18. The method according to claim 17, characterized in that, The index of the plurality of SSBs is the sum of the first product and the first beam index, wherein the first product is the product of the number of the third beam index and the second beam index.

19. The method according to claim 16, characterized in that, The method further includes: On the first time-frequency resource, the DM-RS sequence is detected according to the second cyclic shift; wherein the first time-frequency resource is determined according to the multiple SSS sequences included in the multiple SSBs, and the second cyclic shift is determined according to the first beam index.

20. The method according to claim 19, characterized in that, The first time-frequency resource is determined based on multiple SSS sequences included in the plurality of SSBs, including: the first time-frequency resource is determined based on the cell identifier, the cell identifier is determined based on the second value, and the second value is determined based on the multiple SSS sequences included in the plurality of SSBs; Among them, the identifier of the community Second value The following relationship must be satisfied: Where M represents the number of third beam indices, Indicates rounding down. It is determined based on the multiple master synchronization signals (PSS) included in the multiple SSBs.

21. The method according to claim 17 or 18, characterized in that, The method further includes: Obtain the second correspondence; wherein, the second correspondence is the correspondence between the root sequence corresponding to the DM-RS sequence and the fourth beam index, and the fourth beam index includes the second beam index; Based on the second correspondence, the fourth beam index corresponding to the root sequence corresponding to the first DM-RS sequence is determined as the second beam index.

22. A communication device, characterized in that, The communication device includes: a module or unit for implementing the method according to any one of claims 1-7; or a module or unit for implementing the method according to any one of claims 8-14; or a module or unit for implementing the method according to any one of claims 15-21.

23. A communication device, characterized in that, include: A memory and a processor coupled to the memory, the memory for storing a program, the processor for executing the program stored in the memory; when the communication device is running, the processor runs the program, causing the communication device to perform the method according to any one of claims 1-7; or, causing the communication device to perform the method according to any one of claims 8-14; or, causing the communication device to perform the method according to any one of claims 15-21.

24. A communication system, characterized in that, The communication system includes a terminal device and a network device; The network device is configured to transmit multiple synchronization signals and physical broadcast channel blocks (SSBs), each SSB including an auxiliary synchronization signal (SSS) sequence with a different cyclic shift; the terminal device is configured to perform the method as described in any one of claims 1-7; or, Wherein, the network device is used to send multiple SSBs, each SSB including an SSS sequence with a different cyclic shift and symbol number; the terminal device is used to execute the method as described in any one of claims 8-14; or, The network device is used to send multiple SSBs, each SSB including a different root sequence corresponding to an SSS sequence; the terminal device is used to perform the method as described in any one of claims 15-21.

25. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed by a computer, causes the computer to perform the method according to any one of claims 1-7; or, when executed by a computer, causes the computer to perform the method according to any one of claims 8-14; or, when executed by a computer, causes the computer to perform the method according to any one of claims 15-21.

26. A computer program product, characterized in that, The computer program product includes computer instructions that, when executed on a computer, cause the computer to perform the method of any one of claims 1-7; or cause the computer to perform the method of any one of claims 8-14; or cause the computer to perform the method of any one of claims 15-21.

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