Communication method and communication apparatus

Abstract

A communication method and a communication apparatus. The method comprises: receiving an SSB, wherein the subcarrier space (SCS) of the SSB is a first SCS; on the basis of the SSB, determining a second SCS for initial access; and on the basis of the second SCS, receiving a system information block, wherein the size of the first SCS satisfies 15*2n and the size of the second SCS satisfies 16*2m, or the size of the second SCS satisfies 15*2n and the size of the first SCS satisfies 16*2m, or the size of the first SCS satisfies 16*2m and the size of the first SCS satisfies 16*2m, m and n being integers greater than or equal to 0. By means of the method and apparatus provided in the embodiments of the present application, during initial access of a terminal device to a cell, a flexible SCS can be used, and thus the flexible configuration of a communication resource for cell access is facilitated, thereby making the communication resource for cell access better match a communication requirement, and improving the communication performance.

Description

A communication method and a communication apparatus

[0001] The present application claims priority to the Chinese patent application No. 202410437696.8, filed on April 9, 2024, and entitled "A communication method and a communication apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] Embodiments of the present application relate to the field of communication, and more particularly, to a communication method and a communication apparatus. BACKGROUND

[0003] A synchronization signal block (SSB) or a system information block (SIB) can be used for cell access and the like. At present, in the process of cell access by a terminal or a base station through an SSB or a SIB, a subcarrier space (SCS) specified by the 3rd generation partnership project (3GPP) needs to be used for communication, which makes the communication resources used for cell access in different environments and different communication requirements not flexible enough to match the communication requirements well, thereby affecting the communication performance.

[0004] At present, how to flexibly configure the communication resources for cell access has become a problem to be solved. SUMMARY

[0005] Embodiments of the present application provide a communication method and a communication apparatus, which help to flexibly configure the communication resources for cell access and improve the communication performance.

[0006] In a first aspect, a communication method is provided, which can be executed by a terminal device, or can also be executed by a communication module configured in the terminal device, or a circuit or chip or chip system responsible for the communication function in the terminal (such as a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or system in package (SIP) chip containing a modem core), and the present application embodiments do not limit this. Here, the method is taken as an example applied to a terminal.

[0007] The method comprises: receiving a synchronization signal block (SSB), a subcarrier spacing (SCS) of the SSB being a first SCS; determining a second SCS for initial access according to the SSB; and receiving a system information block according to the second SCS; wherein a size of the first SCS satisfies 15*2 n , and a size of the second SCS satisfies (15+x)*2 m ; or a size of the second SCS satisfies 15*2 n , and a size of the first SCS satisfies (15+x)*2 m ; or a size of the first SCS satisfies (15+x)*2 m , and a size of the first SCS satisfies (15+x)*2 m , x is greater than 0 and less than 15, and m and n are integers greater than or equal to 0.

[0008] For example, (15+x) is equal to 20 or 16; or (15+x) is equal to 24 or 16.

[0009] In some possible implementation manners, the method comprises: receiving a synchronization signal block (SSB), a subcarrier spacing (SCS) of the SSB being a first SCS; determining a second SCS for initial access according to the SSB; and receiving a system information block according to the second SCS; wherein a size of the first SCS satisfies 15*2 n , and a size of the second SCS satisfies 16*2 m ; or a size of the second SCS satisfies 15*2 n , and a size of the first SCS satisfies 16*2 m ; or a size of the first SCS satisfies 16*2 m , and a size of the first SCS satisfies 16*2 m , m and n are integers greater than or equal to 0.

[0010] For example, the system information block comprises a SIB1, a SIB2, and / or a remaining minimum system information (RMSI) or the like.

[0011] According to the scheme provided in the embodiments of the present application, the size of the SCS satisfies 15*2 n or (15+x)*2 m (for example, 16*2 m , and for example, 24*2 m), which greatly increases the selectable values of the SCS. Thus, when the terminal device initially accesses the cell, a flexible SCS can be selected for initial access according to the actual communication situation, which helps to flexibly configure the communication resources for cell access, so that the communication resources for cell access can better match the communication demand, thereby improving the communication performance.

[0012] In some possible implementation manners, the size of the first SCS satisfies 16*2 m , and the symbol length corresponding to the first SCS is equal to the symbol length corresponding to the SCS with the size of 15*2 m ; and / or, the size of the second SCS satisfies 16*2 m , and the symbol length corresponding to the second SCS is equal to the symbol length corresponding to the SCS with the size of 15*2 m ; wherein the symbol length includes a useful symbol length and a cyclic prefix CP length.

[0013] Based on the scheme provided in the embodiments of the present application, the symbol length corresponding to the SCS with the size of 16*2 m is equal to the symbol length corresponding to the SCS with the size of 15*2 m , so that the CP corresponding to the SCS with the size of 16*2 m is longer than the CP corresponding to the SCS with the size of 15*2 m , which can meet the communication demand of the longer CP. When the terminal device initially accesses the cell, a flexible CP can be used for initial access, which helps to flexibly configure the communication resources for cell access, so that the communication resources for cell access can better match the communication demand, thereby improving the communication performance.

[0014] In some possible implementation manners, the second SCS used for initial access is determined according to the SSB, including: determining the second SCS according to a master information block MIB in the SSB, and the size of the second SCS satisfies 16*2 m .

[0015] In some possible implementation manners, the second SCS is determined according to a master information block MIB in the SSB, including: the MIB indicates the second SCS, or the MIB indicates whether to enable a first family SCS, and the first family SCS includes the SCS with the size of 16*2 m .

[0016] For example, the MIB indicating whether to enable the first family SCS includes: the MIB includes first indication information, and the first indication information is used to indicate that the first family SCS is enabled; and / or, the MIB includes second indication information, and the second indication information is used to indicate that the first family SCS is not enabled.

[0017] Exemplarily, the MIB indicating whether the first family of SCSs is enabled comprises: the MIB indicating whether the first family of SCSs is enabled to use; or the MIB indicating whether the first family of SCSs is permitted; or the MIB indicating whether the first family of SCSs is authorized; or the MIB indicating whether the first family of SCSs is activated.

[0018] Based on the scheme provided in the embodiments of the present application, after receiving the SSB, the terminal device determines the second SCS through the MIB carried in the SSB, which can flexibly configure the communication resources for cell access, so that the communication resources for cell access can be more matched with the communication demand, thereby improving the communication performance.

[0019] In some possible implementation manners, the second SCS for initial access is determined according to the SSB, including any one of the following: the parameter value corresponding to the second SCS is determined according to the time domain position of the secondary synchronization signal SSS and / or the primary synchronization signal PSS in the SSB, the time domain position of the SSS and / or the PSS in the SSB has an association relationship with the parameter value corresponding to the second SCS; or the parameter value corresponding to the second SCS is determined according to the first SCS, the parameter value corresponding to the first SCS has an association relationship with the parameter value corresponding to the second SCS; or the parameter value corresponding to the second SCS is determined according to the MIB in the SSB, the MIB in the SSB has an association relationship with the parameter value corresponding to the second SCS; wherein the parameter value corresponding to the second SCS includes the value of m corresponding to the second SCS.

[0020] Based on the scheme provided in the embodiments of the present application, after receiving the SSB, the terminal device determines the value of m corresponding to the second SCS through the association relationship between the time domain position of the SSS and / or the PSS in the SSB, the first SCS, or the MIB and the value of m corresponding to the second SCS, which can flexibly configure the communication resources for cell access, so that the communication resources for cell access can be more matched with the communication demand, thereby improving the communication performance.

[0021] Exemplarily, the association relationship is predefined by a protocol; or the association relationship is a result of negotiation between the terminal device and the network device; or the association relationship is informed to the terminal device by the network device through signaling; or other determination manners, which are not limited in the embodiments of the present application.

[0022] In some possible implementation manners, the second SCS for initial access is determined according to the SSB, including any one of the following: the size of the second SCS satisfies 15*2 n or 16*2 m according to the time domain position of the secondary synchronization signal SSS and / or the primary synchronization signal PSS in the SSB; the size of the second SCS is determined according to the first SCS, the size of the first SCS satisfies 15*2 n or 16*2 m; or, the size of the second SCS determined according to the MIB in the SSB satisfies 15*2 n or 16*2 m .

[0023] Based on the scheme provided in the embodiments of the present application, after receiving the SSB, the terminal device determines the size of the first SCS through the time domain position of the SSS and / or the PSS in the SSB, the first SCS, or the MIB, and the size of the second SCS satisfies 15*2 n or 16*2 m , which can realize flexible configuration of the communication resources for cell access, so that the communication resources for cell access can be more matched with the communication demand, thereby improving the communication performance.

[0024] In some possible implementation manners, the method further includes: determining the first SCS according to the time domain position of the SSS in the SSB, wherein the time domain position of the SSS in the SSB has an association relationship with the first SCS.

[0025] For example, when the time domain position of the SSS is a first position, the size of the first SCS satisfies 15*2 n ; or, when the time domain position of the SSS is a second position, the size of the first SCS satisfies 16*2 m .

[0026] For example, the association relationship is predefined by a protocol; or, the association relationship is a result of negotiation between the terminal device and the network device; or, the association relationship is informed to the terminal device by the network device through signaling; or, other determination manners, which are not limited in the embodiments of the present application.

[0027] Based on the scheme provided in the embodiments of the present application, after receiving the SSB, the terminal device determines the value of the first SCS through detecting the time domain position of the SSS in the SSB and the association relationship between the time domain position and the value of the first SCS, which can realize determination of the size of the first SCS.

[0028] In a second aspect, a communication method is provided, which can be executed by a terminal device, or can also be executed by a communication module configured in the terminal device, or a circuit or chip or chip system responsible for the communication function in the terminal (for example, a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or system in package (SIP) chip containing a modem core), which is not limited in the embodiments of the present application.

[0029] The method comprises: receiving a synchronization signal block (SSB), a subcarrier spacing (SCS) of the SSB being a first SCS; determining a second SCS for initial access according to the SSB; and receiving a system information block according to the second SCS; wherein a size of the first SCS and / or the second SCS satisfies (15+x)*2 m , x is greater than 0 and less than 15, and m is an integer greater than or equal to 0.

[0030] For example, (15+x) is equal to 20 or 16; or (15+x) is equal to 24 or 16.

[0031] In some possible implementation manners, the method comprises: receiving a synchronization signal block (SSB), a subcarrier spacing (SCS) of the SSB being a first SCS; determining a second SCS for initial access according to the SSB; and receiving a system information block according to the second SCS; wherein a size of the first SCS and / or the second SCS satisfies 16*2 m , and m is an integer greater than or equal to 0.

[0032] According to the scheme provided in the embodiments of the present application, the size of the SCS satisfies (15+x)*2 m (for example, 16*2 m , for another example, 24*2 m ), which greatly increases the selectable values of the SCS, so that when the terminal device initially accesses a cell, a flexible SCS can be selected and used for initial access according to actual communication conditions, which helps to flexibly configure the communication resources for cell access, so that the communication resources for cell access can be more matched with the communication demand, thereby improving the communication performance.

[0033] For example, the system information block comprises a SIB1, a SIB2, and / or a RMSI and a series of system information blocks.

[0034] In some possible implementation manners, the size of the first SCS satisfies 16*2 m , and the size of the second SCS satisfies 15*2 n , n is an integer greater than or equal to 0; or the size of the second SCS satisfies 16*2 m , and the size of the first SCS satisfies 15*2 n , n is an integer greater than or equal to 0; or the size of the first SCS satisfies 16*2 m , and the size of the first SCS satisfies 16*2 m .

[0035] According to the scheme provided in the embodiments of the present application, the size of the SCS satisfies 15*2 n or 16*2 mThe optional values of the SCS are greatly increased, so that when the terminal device initially accesses the cell, flexible SCS can be selected for initial access according to the actual communication situation, which helps to flexibly configure the communication resources of cell access, so that the communication resources of cell access can be more matched with the communication demand, thereby improving the communication performance.

[0036] In some possible implementation manners, the size of the first SCS satisfies 16*2 m , and the symbol length corresponding to the first SCS is equal to the symbol length corresponding to the SCS with the size of 15*2 m ; and / or, the size of the second SCS satisfies 16*2 m , and the symbol length corresponding to the second SCS is equal to the symbol length corresponding to the SCS with the size of 15*2 m ; wherein the symbol length includes the useful symbol length and the CP length.

[0037] In some possible implementation manners, the second SCS used for initial access is determined according to the SSB, including: the second SCS is determined according to a master information block (MIB) in the SSB, and the size of the second SCS satisfies 16*2 m .

[0038] In some possible implementation manners, the second SCS is determined according to the MIB in the SSB, including: the MIB indicates the second SCS, or the MIB indicates whether to enable the first family SCS, and the first family SCS includes the SCS with the size satisfying 16*2 m .

[0039] For example, the MIB indicating whether to enable the first family SCS includes: the MIB includes first indication information, and the first indication information is used to indicate that the first family SCS is enabled; and / or, the MIB includes second indication information, and the second indication information is used to indicate that the first family SCS is not enabled.

[0040] For example, the MIB indicating whether to enable the first family SCS includes: the MIB indicates whether to enable the first family SCS; or the MIB indicates whether to permit the first family SCS; or the MIB indicates whether to authorize the first family SCS; or the MIB indicates whether to activate the first family SCS.

[0041] In some possible implementation manners, the second SCS for initial access is determined according to the SSB, including any one of the following: determining a parameter value corresponding to the second SCS according to a time domain position of a secondary synchronization signal (SSS) and / or a primary synchronization signal (PSS) in the SSB, the time domain position of the SSS and / or the PSS in the SSB having an association relationship with the parameter value corresponding to the second SCS; or determining the parameter value corresponding to the second SCS according to a first SCS, the parameter value corresponding to the first SCS having an association relationship with the parameter value corresponding to the second SCS; or determining the parameter value corresponding to the second SCS according to a master information block (MIB) in the SSB, the MIB in the SSB having an association relationship with the parameter value corresponding to the second SCS; wherein the parameter value corresponding to the second SCS includes a value of m corresponding to the second SCS.

[0042] For example, the association relationship is predefined by a protocol, or is a result of negotiation between the terminal device and the network device, or is informed to the terminal device by the network device through signaling, or is determined in another manner, which is not limited in the embodiments of the present application.

[0043] In some possible implementation manners, the second SCS for initial access is determined according to the SSB, including any one of the following: determining a size of the second SCS to satisfy 15*2 n or 16*2 m according to a time domain position of a secondary synchronization signal (SSS) and / or a primary synchronization signal (PSS) in the SSB; determining the size of the second SCS to satisfy 15*2 n or 16*2 m according to a first SCS; or determining the size of the second SCS to satisfy 15*2 n or 16*2 m according to a master information block (MIB) in the SSB.

[0044] In some possible implementation manners, the method further includes: determining the first SCS according to a time domain position of a secondary synchronization signal (SSS) in the SSB, wherein the time domain position of the SSS in the SSB has an association relationship with the first SCS.

[0045] For example, when the time domain position of the SSS is a first position, the size of the first SCS satisfies 15*2 n ; or when the time domain position of the SSS is a second position, the size of the first SCS satisfies 16*2 m .

[0046] For example, the association relationship is predefined by a protocol, or is a result of negotiation between the terminal device and the network device, or is informed to the terminal device by the network device through signaling, or is determined in another manner, which is not limited in the embodiments of the present application.

[0047] In a third aspect, a communication method is provided, which can be performed by a network device or a component (e.g., a chip or a circuit or a chip system) configured in the network device, and the embodiments of the present application do not limit this.

[0048] The method comprises: transmitting an SSB, the SCS of the SSB being a first SCS; and transmitting a system information block, the SCS of the system information block being a second SCS; wherein the size of the first SCS satisfies 15*2 n , and the size of the second SCS satisfies (15+x)*2 m ; or the size of the second SCS satisfies 15*2 n , and the size of the first SCS satisfies (15+x)*2 m ; or the size of the first SCS satisfies (15+x)*2 m , and the size of the first SCS satisfies (15+x)*2 m , x is greater than 0 and less than 15, and m and n are integers greater than or equal to 0.

[0049] Illustratively, before transmitting the SSB or the system information block, the method further comprises: determining the size of the first SCS and / or the size of the second SCS.

[0050] Illustratively, determining the size of the first SCS and / or the size of the second SCS comprises: determining the size of the first SCS and / or the size of the second SCS according to a channel condition.

[0051] Illustratively, before transmitting the SSB or the system information block, the method further comprises: generating the SSB or the system information block.

[0052] Based on the scheme provided in the embodiments of the present application, the base station can flexibly configure the communication resources for cell access for the terminal device according to the channel condition, so that the communication resources for cell access can be more matched with the communication demand, thereby improving the communication performance.

[0053] Illustratively, (15+x) is equal to 20 or 16; or (15+x) is equal to 24 or 16.

[0054] In some possible implementation manners, the method comprises: transmitting an SSB, the SCS of the SSB being a first SCS; and transmitting a system information block, the SCS of the system information block being a second SCS; wherein the size of the first SCS satisfies 15*2 n , and the size of the second SCS satisfies 16*2 m ; or the size of the second SCS satisfies 15*2 n , and the size of the first SCS satisfies 16*2 m ; or the size of the first SCS satisfies 16*2 m, and a size of the first SCS satisfies 16*2 m , m and n are integers greater than or equal to 0.

[0055] Exemplarily, the system information block includes SIB1, SIB2, and / or a series of system information blocks such as RMSI.

[0056] Based on the scheme provided in the embodiments of the present application, the size of the SCS satisfies 15*2 n or (15+x)*2 m (such as 16*2 m , and 24*2 m ), which greatly increases the selectable values of the SCS. Thus, when the terminal device initially accesses the cell, flexible SCS can be selected and used for initial access according to the actual communication situation, which helps to flexibly configure the communication resources for cell access, so that the communication resources for cell access can better match the communication demand, thereby improving the communication performance.

[0057] In some possible implementation manners, the size of the first SCS satisfies 16*2 m , and the symbol length corresponding to the first SCS is equal to the symbol length corresponding to the SCS with a size of 15*2 m ; and / or, the size of the second SCS satisfies 16*2 m , and the symbol length corresponding to the second SCS is equal to the symbol length corresponding to the SCS with a size of 15*2 m ; wherein the symbol length includes the useful symbol length and the CP length.

[0058] Based on the scheme provided in the embodiments of the present application, the symbol length corresponding to the SCS with a size of 16*2 m is equal to the symbol length corresponding to the SCS with a size of 15*2 m , so that the CP corresponding to the SCS with a size of 16*2 m is longer than the CP corresponding to the SCS with a size of 15*2 m , which can meet the communication demand of longer CP. When the terminal device initially accesses the cell, flexible CP can be used for initial access, which helps to flexibly configure the communication resources for cell access, so that the communication resources for cell access can better match the communication demand, thereby improving the communication performance.

[0059] In some possible implementation manners, the SSB is transmitted, including: transmitting the MIB, the MIB being used to indicate the second SCS.

[0060] In some possible implementation manners, the MIB is used to indicate the second SCS, including: the MIB indicating the second SCS, or the MIB indicating whether the first family SCS is enabled, the first family SCS including a SCS with a size satisfying 16*2m of SCS.

[0061] Exemplarily, the MIB indication of whether to enable the first family of SCS includes: the MIB includes first indication information, the first indication information is used to indicate that the first family of SCS is enabled; and / or, the MIB includes second indication information, the second indication information is used to indicate that the first family of SCS is not enabled.

[0062] Exemplarily, the MIB indicating whether the first family SCS is enabled includes: the MIB indicating whether the first family SCS is enabled for use; or, the MIB indicating whether the first family SCS is permitted; or, the MIB indicating whether the first family SCS is authorized; or, the MIB indicating whether the first family SCS is activated.

[0063] Based on the solution provided in the embodiment of the present application, the network device carries the MIB in the sent SSB, so that the terminal device can determine the second SCS based on the MIB, and can flexibly configure the communication resources for cell access, so that the communication resources for cell access can better match the communication needs, thereby improving communication performance.

[0064] In some possible implementations, the time domain position of the SSS and / or PSS in the SSB is associated with the parameter value corresponding to the second SCS; or, the parameter value corresponding to the first SCS is associated with the parameter value corresponding to the second SCS; or, the MIB in the SSB is associated with the parameter value corresponding to the second SCS; wherein, the parameter value corresponding to the second SCS includes the value of m corresponding to the second SCS.

[0065] Based on the solution provided in the embodiment of the present application, the network device sets the time domain position of the SSS and / or PSS in the sent SSB, the first SCS, and the MIB so that the terminal device can determine the value of m corresponding to the second SCS through the association between the time domain position of the SSS and / or PSS in the SSB, the first SCS, or the MIB and the value of m corresponding to the second SCS. This can achieve flexible configuration of communication resources for cell access, so that the communication resources for cell access can better match communication requirements, thereby improving communication performance.

[0066] Exemplarily, the association relationship is predefined by the protocol; or, the association relationship is the result of negotiation between the terminal device and the network device; or, the association relationship is notified to the terminal device by the network device through signaling; or, other determination methods are used, which are not limited in the embodiments of the present application.

[0067] In some possible implementations, the time domain position of the SSS and / or PSS in the SSB and the size of the second SCS satisfy 15*2 n or 16*2 m Have an associated relationship; or, the size of the first SCS and the second SCS satisfies 15*2n or 16*2 m has an association relationship; or, the size of the MIB in the SSB and the second SCS satisfies 15*2 n or 16*2 m has an association relationship.

[0068] Based on the scheme provided in the embodiments of the present application, the network device sets the time domain position of the SSS and / or the PSS in the transmitted SSB, the first SCS, and the MIB, so that the terminal device can determine that the size of the second SCS satisfies 15*2 n or 16*2 m , the communication resources for cell access can be flexibly configured, so that the communication resources for cell access can better match the communication demand, thereby improving the communication performance.

[0069] In some possible implementation manners, the time domain position of the SSS in the SSB has an association relationship with the first SCS.

[0070] For example, when the time domain position of the SSS is a first position, the size of the first SCS satisfies 15*2 n ; or, when the time domain position of the SSS is a second position, the size of the first SCS satisfies 16*2 m .

[0071] For example, the association relationship is predefined by a protocol; or, the association relationship is a result of negotiation between the terminal device and the network device; or, the association relationship is informed to the terminal device by the network device through signaling; or, other determination manners, which are not limited in the embodiments of the present application.

[0072] In a fourth aspect, a communication method is provided, which can be executed by a network device, or can also be executed by a component (for example, a chip or a circuit or a chip system) configured in the network device, which is not limited in the embodiments of the present application.

[0073] The method comprises: transmitting an SSB, the SCS of the SSB being a first SCS; transmitting a system information block, the SCS of the system information block being a second SCS; wherein the size of the first SCS and / or the second SCS satisfies (15+x)*2 m , x is greater than 0 and less than 15, and m is an integer greater than or equal to 0.

[0074] For example, before transmitting the SSB or the system information block, the method further comprises: generating the SSB or the system information block.

[0075] For example, before transmitting the SSB or the system information block, the method further comprises: determining the size of the first SCS and / or the size of the second SCS.

[0076] For example, determining the size of the first SCS and / or the size of the second SCS comprises determining the size of the first SCS and / or the size of the second SCS according to a channel condition.

[0077] For example, (15+x) is equal to 20 or 16; or, (15+x) is equal to 24 or 16.

[0078] In some possible implementation manners, the method comprises: transmitting an SSB, wherein a SCS of the SSB is the first SCS; and transmitting a system information block, wherein a SCS of the system information block is the second SCS; and wherein the size of the first SCS and / or the size of the second SCS satisfies 16*2 m , and m is an integer greater than or equal to 0.

[0079] According to the scheme provided in the embodiments of the present application, the size of the SCS is designed to satisfy (15+x)*2 m (for example, 16*2 m , for another example, 24*2 m ), which greatly increases the selectable values of the SCS, so that when the terminal device initially accesses a cell, a flexible SCS can be selected and used for initial access according to an actual communication condition, which helps to flexibly configure the communication resources for cell access, so that the communication resources for cell access can be more matched with the communication demand, thereby improving the communication performance.

[0080] For example, the system information block comprises a SIB1, a SIB2, and / or a RMSI, and the like.

[0081] In some possible implementation manners, the size of the first SCS satisfies 16*2 m , and the size of the second SCS satisfies 15*2 n , and n is an integer greater than or equal to 0; or, the size of the second SCS satisfies 16*2 m , and the size of the first SCS satisfies 15*2 n , and n is an integer greater than or equal to 0; or, the size of the first SCS satisfies 16*2 m , and the size of the first SCS satisfies 16*2 m .

[0082] According to the scheme provided in the embodiments of the present application, the size of the SCS is designed to satisfy 15*2 n or 16*2 m , which greatly increases the selectable values of the SCS, so that when the terminal device initially accesses a cell, a flexible SCS can be selected and used for initial access according to an actual communication condition, which helps to flexibly configure the communication resources for cell access, so that the communication resources for cell access can be more matched with the communication demand, thereby improving the communication performance.

[0083] In some possible implementation manners, the size of the first SCS satisfies 16*2 m , and a symbol length corresponding to the first SCS is equal to a symbol length corresponding to an SCS with a size of 15*2 m ; and / or, the size of the second SCS satisfies 16*2 m , and a symbol length corresponding to the second SCS is equal to a symbol length corresponding to an SCS with a size of 15*2 m ; wherein the symbol length includes a useful symbol length and a CP length.

[0084] In some possible implementation manners, the SSB is transmitted, including: transmitting an MIB, the MIB being used to indicate the second SCS.

[0085] In some possible implementation manners, the MIB is used to indicate the second SCS, including: the MIB indicating the second SCS, or the MIB indicating whether a first family of SCSs is enabled, the first family of SCSs including SCSs with sizes satisfying 16*2 m .

[0086] For example, the MIB indicating whether the first family of SCSs is enabled includes: the MIB including first indication information, the first indication information being used to indicate that the first family of SCSs is enabled; and / or, the MIB including second indication information, the second indication information being used to indicate that the first family of SCSs is not enabled.

[0087] For example, the MIB indicating whether the first family of SCSs is enabled includes: the MIB indicating whether the first family of SCSs is enabled to be used; or the MIB indicating whether the first family of SCSs is permitted; or the MIB indicating whether the first family of SCSs is authorized; or the MIB indicating whether the first family of SCSs is activated.

[0088] In some possible implementation manners, a time domain position of SSS and / or PSS in the SSB has an association relationship with a parameter value corresponding to the second SCS; or parameter values corresponding to the first SCS and the second SCS have an association relationship; or an MIB in the SSB has an association relationship with a parameter value corresponding to the second SCS; wherein the parameter value corresponding to the second SCS includes a value of m corresponding to the second SCS.

[0089] For example, the association relationship is predefined by a protocol; or the association relationship is a result of negotiation between a terminal device and a network device; or the association relationship is informed to the terminal device by the network device through signaling; or other determination manners, which are not limited by the embodiments of the present application.

[0090] In some possible implementation manners, a time domain position of SSS and / or PSS in the SSB has an association relationship with a size of the second SCS satisfying 15*2 n or 16*2m has a correlation relationship; or the size of the first SCS and the size of the second SCS satisfy 15*2 n or 16*2 m has a correlation relationship; or the size of the MIB in the SSB and the size of the second SCS satisfy 15*2 n or 16*2 m has a correlation relationship.

[0091] In some possible implementation manners, the time domain position of the SSS in the SSB has a correlation relationship with the first SCS.

[0092] For example, when the time domain position of the SSS is the first position, the size of the first SCS satisfies 15*2 n ; or when the time domain position of the SSS is the second position, the size of the first SCS satisfies 16*2 m .

[0093] For example, the correlation relationship is predefined by a protocol; or the correlation relationship is a result of negotiation between the terminal device and the network device; or the correlation relationship is informed to the terminal device by the network device through signaling; or other determination manners, which are not limited by the embodiments of the present application.

[0094] In a fifth aspect, a communication apparatus is provided, which can be a terminal device, a communication module in a terminal, or a chip or circuit or chip system configured to be responsible for communication functions in the terminal device, which is not limited by the embodiments of the present application.

[0095] The apparatus includes: a transceiver unit, configured to receive an SSB, a subcarrier spacing SCS of the SSB being a first SCS; a processing unit, configured to determine a second SCS used for initial access according to the SSB; and the transceiver unit is further configured to receive a system information block according to the second SCS; wherein the size of the first SCS satisfies 15*2 n , and the size of the second SCS satisfies (15+x)*2 m ; or the size of the second SCS satisfies 15*2 n , and the size of the first SCS satisfies (15+x)*2 m ; or the size of the first SCS satisfies (15+x)*2 m , and the size of the first SCS satisfies (15+x)*2 m , x is greater than 0 and less than 15, and m and n are integers greater than or equal to 0.

[0096] For example, (15+x) is equal to 20 or 16; or (15+x) is equal to 24 or 16.

[0097] In some possible implementation manners, the size of the first SCS satisfies 15*2n , and the size of the second SCS satisfies 16*2 m ; or, the size of the second SCS satisfies 15*2 n , and the size of the first SCS satisfies 16*2 m ; or, the size of the first SCS satisfies 16*2 m , and the size of the first SCS satisfies 16*2 m , and m and n are integers greater than or equal to 0.

[0098] Exemplarily, the system information blocks include SIB1, SIB2, and / or RMSI, and the like.

[0099] In some possible implementation manners, the size of the first SCS satisfies 16*2 m , and the corresponding symbol length of the first SCS is equal to the corresponding symbol length of the SCS with the size of 15*2 m ; and / or, the size of the second SCS satisfies 16*2 m , and the corresponding symbol length of the second SCS is equal to the corresponding symbol length of the SCS with the size of 15*2 m ; wherein the symbol length includes a useful symbol length and a CP length.

[0100] In some possible implementation manners, the processing unit is specifically configured to determine the second SCS according to a master information block MIB in the SSB, and the size of the second SCS satisfies 16*2 m .

[0101] In some possible implementation manners, determining the second SCS according to the master information block MIB in the SSB includes: the MIB indicates the second SCS, or the MIB indicates whether to enable a first family of SCSs, and the first family of SCSs includes SCSs with the size satisfying 16*2 m .

[0102] Exemplarily, the MIB indicating whether to enable the first family of SCSs includes: the MIB includes first indication information, and the first indication information is used to indicate that the first family of SCSs is enabled; and / or, the MIB includes second indication information, and the second indication information is used to indicate that the first family of SCSs is not enabled.

[0103] Exemplarily, the MIB indicating whether to enable the first family of SCSs includes: the MIB indicates whether to enable the first family of SCSs; or, the MIB indicates whether to permit the first family of SCSs; or, the MIB indicates whether to authorize the first family of SCSs; or, the MIB indicates whether to activate the first family of SCSs.

[0104] In some possible implementation manners, the processing unit is specifically configured to perform any one of the following: determining the parameter value corresponding to the second SCS according to a time domain position of a secondary synchronization signal (SSS) and / or a primary synchronization signal (PSS) in the SSB, the time domain position of the SSS and / or the PSS in the SSB being associated with the parameter value corresponding to the second SCS; or determining the parameter value corresponding to the second SCS according to the first SCS, the first SCS being associated with the parameter value corresponding to the second SCS; or determining the parameter value corresponding to the second SCS according to a master information block (MIB) in the SSB, the MIB in the SSB being associated with the parameter value corresponding to the second SCS; wherein the parameter value corresponding to the second SCS includes a value of m corresponding to the second SCS.

[0105] For example, the association relationship is predefined by a protocol, or is a result of negotiation between the terminal device and the network device, or is informed to the terminal device by the network device through signaling, or is determined in another manner, which is not limited in the embodiments of the present application.

[0106] In some possible implementation manners, the processing unit is specifically configured to perform any one of the following: determining that the size of the second SCS satisfies 15*2 n or 16*2 m according to a time domain position of a secondary synchronization signal (SSS) and / or a primary synchronization signal (PSS) in the SSB; determining that the size of the second SCS satisfies 15*2 n or 16*2 m according to the first SCS; or determining that the size of the second SCS satisfies 15*2 n or 16*2 m according to a master information block (MIB) in the SSB.

[0107] In some possible implementation manners, the processing unit is further configured to determine the first SCS according to a time domain position of a secondary synchronization signal (SSS) in the SSB, the time domain position of the SSS in the SSB being associated with the first SCS.

[0108] For example, when the time domain position of the SSS is a first position, the size of the first SCS satisfies 15*2 n ; or when the time domain position of the SSS is a second position, the size of the first SCS satisfies 16*2 m .

[0109] For example, the association relationship is predefined by a protocol, or is a result of negotiation between the terminal device and the network device, or is informed to the terminal device by the network device through signaling, or is determined in another manner, which is not limited in the embodiments of the present application.

[0110] In a sixth aspect, a communication apparatus is provided. The apparatus can be a terminal device, or a chip or circuit or chip system configured in a terminal device. Embodiments of the present application are not limited in this respect.

[0111] The apparatus includes: a transceiver configured to receive an SSB, a subcarrier spacing (SCS) of the SSB being a first SCS; and a processor configured to determine a second SCS for initial access based on the SSB; and the transceiver is further configured to receive a system information block based on the second SCS; wherein a size of the first SCS and / or the second SCS satisfies (15+x)*2 m , x is greater than 0 and less than 15, and m is an integer greater than or equal to 0.

[0112] For example, (15+x) is equal to 20 or 16; or (15+x) is equal to 24 or 16.

[0113] In some possible implementations, the size of the first SCS and / or the second SCS satisfies 16*2 m , and m is an integer greater than or equal to 0.

[0114] For example, the system information block includes SIB1, SIB2, and / or a series of system information blocks such as RMSI.

[0115] In some possible implementations, the size of the first SCS satisfies 16*2 m , and the size of the second SCS satisfies 15*2 n , and n is an integer greater than or equal to 0; or the size of the second SCS satisfies 16*2 m , and the size of the first SCS satisfies 15*2 n , and n is an integer greater than or equal to 0; or the size of the first SCS satisfies 16*2 m , and the size of the first SCS satisfies 16*2 m .

[0116] In some possible implementations, the size of the first SCS satisfies 16*2 m , and a symbol length corresponding to the first SCS is equal to a symbol length corresponding to a SCS with a size of 15*2 m ; and / or the size of the second SCS satisfies 16*2 m , and a symbol length corresponding to the second SCS is equal to a symbol length corresponding to a SCS with a size of 15*2 m ; wherein the symbol length includes a useful symbol length and a CP length.

[0117] In some possible implementations, the processor is specifically configured to determine the second SCS based on a master information block (MIB) in the SSB, and the size of the second SCS satisfies 16*2m .

[0118] In some possible implementation manners, the second SCS is determined according to a master information block (MIB) in the SSB, including: the MIB indicates the second SCS, or the MIB indicates whether the first family of SCSs is enabled, and the first family of SCSs includes SCSs with sizes satisfying 16*2 m .

[0119] For example, the MIB indicating whether the first family of SCSs is enabled includes: the MIB includes first indication information, the first indication information being used to indicate that the first family of SCSs is enabled; and / or the MIB includes second indication information, the second indication information being used to indicate that the first family of SCSs is not enabled.

[0120] For example, the MIB indicating whether the first family of SCSs is enabled includes: the MIB indicating whether the first family of SCSs is enabled to be used; or the MIB indicating whether the first family of SCSs is permitted; or the MIB indicating whether the first family of SCSs is authorized; or the MIB indicating whether the first family of SCSs is activated.

[0121] In some possible implementation manners, the processing unit is specifically configured to perform any one of the following: determining a parameter value corresponding to the second SCS according to a time domain position of a secondary synchronization signal (SSS) and / or a primary synchronization signal (PSS) in the SSB, the time domain position of the SSS and / or the PSS in the SSB having an association relationship with the parameter value corresponding to the second SCS; or determining the parameter value corresponding to the second SCS according to the first SCS, the first SCS having an association relationship with the parameter value corresponding to the second SCS; or determining the parameter value corresponding to the second SCS according to the MIB in the SSB, the MIB in the SSB having an association relationship with the parameter value corresponding to the second SCS; wherein the parameter value corresponding to the second SCS includes a value of m corresponding to the second SCS.

[0122] For example, the association relationship is predefined by a protocol; or the association relationship is a result of negotiation between the terminal device and the network device; or the association relationship is informed to the terminal device by the network device through signaling; or other determination manners, which are not limited by the embodiments of the present application.

[0123] In some possible implementation manners, the processing unit is specifically configured to perform any one of the following: determining that a size of the second SCS satisfies 15*2 n or 16*2 m according to a time domain position of a secondary synchronization signal (SSS) and / or a primary synchronization signal (PSS) in the SSB; determining that the size of the second SCS satisfies 15*2 n or 16*2 m according to the first SCS; or determining that the size of the second SCS satisfies 15*2 n or 16*2m .

[0124] In some possible implementation manners, the processing unit is further configured to determine the first SCS according to a time domain position of the SSS in the SSB, where the time domain position of the SSS in the SSB has an association relationship with the first SCS.

[0125] For example, when the time domain position of the SSS is a first position, the size of the first SCS satisfies 15*2 n ; or, when the time domain position of the SSS is a second position, the size of the first SCS satisfies 16*2 m .

[0126] For example, the association relationship is predefined by a protocol, or is a result of negotiation between the terminal device and the network device, or is informed to the terminal device by the network device through signaling, or is another determination manner, which is not limited in the embodiments of the present application.

[0127] In a seventh aspect, a communication apparatus is provided, which can be a network device, or can be a chip or circuit configured in the network device, and the embodiments of the present application are not limited here.

[0128] The apparatus includes a transceiver configured to transmit an SSB, and the SCS of the SSB is a first SCS; the transceiver is further configured to transmit a system information block, and the SCS of the system information block is a second SCS; where the size of the first SCS satisfies 15*2 n , and the size of the second SCS satisfies (15+x)*2 m ; or, the size of the second SCS satisfies 15*2 n , and the size of the first SCS satisfies (15+x)*2 m ; or, the size of the first SCS satisfies (15+x)*2 m , and the size of the first SCS satisfies (15+x)*2 m , x is greater than 0 and less than 15, and m and n are integers greater than or equal to 0.

[0129] For example, in some possible implementation manners, the apparatus further includes a processing unit, and before the transceiver transmits the SSB or the system information block, the processing unit is configured to generate the SSB or the system information block.

[0130] For example, before the transceiver transmits the SSB or the system information block, the processing unit is further configured to determine the size of the first SCS and / or the size of the second SCS.

[0131] For example, the processing unit is specifically configured to determine the size of the first SCS and / or the size of the second SCS according to a channel condition.

[0132] For example, (15+x) is equal to 20 or 16; or, (15+x) is equal to 24 or 16.

[0133] In some possible implementation manners, the size of the first SCS satisfies 15*2 n , and the size of the second SCS satisfies 16*2 m ; or, the size of the second SCS satisfies 15*2 n , and the size of the first SCS satisfies 16*2 m ; or, the size of the first SCS satisfies 16*2 m , and the size of the first SCS satisfies 16*2 m , m and n are integers greater than or equal to 0.

[0134] For example, the system information block includes SIB1, SIB2, and / or, RMSI, and / or the like series of system information blocks.

[0135] In some possible implementation manners, the size of the first SCS satisfies 16*2 m , and the corresponding symbol length of the first SCS is equal to the corresponding symbol length of the SCS with the size of 15*2 m ; and / or, the size of the second SCS satisfies 16*2 m , and the corresponding symbol length of the second SCS is equal to the corresponding symbol length of the SCS with the size of 15*2 m ; wherein the symbol length includes a useful symbol length and a CP length.

[0136] In some possible implementation manners, the transceiver is specifically configured to: transmit the MIB, the MIB being used to indicate the second SCS.

[0137] In some possible implementation manners, the MIB is used to indicate the second SCS, including: the MIB indicating the second SCS, or the MIB indicating whether to enable the first family SCS, the first family SCS including the SCS with the size satisfying 16*2 m .

[0138] For example, the MIB indicating whether to enable the first family SCS includes: the MIB including first indication information, the first indication information being used to indicate enabling the first family SCS; and / or, the MIB including second indication information, the second indication information being used to indicate not enabling the first family SCS.

[0139] For example, the MIB indicating whether to enable the first family SCS includes: the MIB indicating whether to enable the first family SCS; or, the MIB indicating whether to permit the first family SCS; or, the MIB indicating whether to authorize the first family SCS; or, the MIB indicating whether to activate the first family SCS.

[0140] In some possible implementation manners, a time domain position of the SSS and / or the PSS in the SSB has a correlation relationship with a parameter value corresponding to the second SCS; or, the first SCS has a correlation relationship with a parameter value corresponding to the second SCS; or, the MIB in the SSB has a correlation relationship with a parameter value corresponding to the second SCS; where the parameter value corresponding to the second SCS includes a value of m corresponding to the second SCS.

[0141] For example, the correlation relationship is predefined by a protocol, or is a result of negotiation between the terminal device and the network device, or is informed by the network device to the terminal device through signaling, or is determined in another manner, which is not limited in the embodiments of the present application.

[0142] In some possible implementation manners, a time domain position of the SSS and / or the PSS in the SSB has a correlation relationship with a size of the second SCS satisfying 15*2 n or 16*2 m ; or, the first SCS has a correlation relationship with the size of the second SCS satisfying 15*2 n or 16*2 m ; or, the MIB in the SSB has a correlation relationship with the size of the second SCS satisfying 15*2 n or 16*2 m .

[0143] In some possible implementation manners, a time domain position of the SSS in the SSB has a correlation relationship with the first SCS.

[0144] For example, when the time domain position of the SSS is a first position, the size of the first SCS satisfies 15*2 n ; or, when the time domain position of the SSS is a second position, the size of the first SCS satisfies 16*2 m .

[0145] For example, the correlation relationship is predefined by a protocol, or is a result of negotiation between the terminal device and the network device, or is informed by the network device to the terminal device through signaling, or is determined in another manner, which is not limited in the embodiments of the present application.

[0146] In an eighth aspect, a communication apparatus is provided, which can be a network device, or can be a chip or circuit or chip system configured in the network device, which is not limited in the embodiments of the present application.

[0147] The apparatus includes a transceiver configured to send an SSB, where a SCS of the SSB is a first SCS; and the transceiver is further configured to send a system information block, where a SCS of the system information block is a second SCS; and a size of the first SCS and / or a size of the second SCS satisfies (15+x)*2m x is greater than 0 and less than 15, and m is an integer greater than or equal to 0.

[0148] In some possible implementations, the apparatus further includes a processing unit, and before the transceiver transmits the SSB or the system information block, the processing unit is configured to generate the SSB or the system information block.

[0149] In some possible implementations, before the transceiver transmits the SSB or the system information block, the processing unit is further configured to determine the size of the first SCS and / or the size of the second SCS.

[0150] In some possible implementations, the processing unit is specifically configured to determine the size of the first SCS and / or the size of the second SCS according to a channel condition.

[0151] In some possible implementations, (15+x) is equal to 20 or 16; or (15+x) is equal to 24 or 16.

[0152] In some possible implementations, the size of the first SCS and / or the size of the second SCS satisfies 16*2 m m is an integer greater than or equal to 0.

[0153] In some possible implementations, the system information block includes a series of system information blocks such as SIB1, SIB2, and / or RMSI.

[0154] In some possible implementations, the size of the first SCS satisfies 16*2 m , and the size of the second SCS satisfies 15*2 n n is an integer greater than or equal to 0; or the size of the second SCS satisfies 16*2 m , and the size of the first SCS satisfies 15*2 n n is an integer greater than or equal to 0; or the size of the first SCS satisfies 16*2 m , and the size of the first SCS satisfies 16*2 m .

[0155] In some possible implementations, the size of the first SCS satisfies 16*2 m , and the corresponding symbol length of the first SCS is equal to the corresponding symbol length of the SCS with the size of 15*2 m ; and / or the size of the second SCS satisfies 16*2 m , and the corresponding symbol length of the second SCS is equal to the corresponding symbol length of the SCS with the size of 15*2 m ; wherein the symbol length includes a useful symbol length and a CP length.

[0156] In some possible implementation manners, the transceiving unit is specifically configured to: transmit the MIB, where the MIB is used to indicate the second SCS.

[0157] In some possible implementation manners, the MIB is used to indicate the second SCS, including: the MIB indicates the second SCS, or the MIB indicates whether the first family of SCSs is enabled, where the first family of SCSs includes SCSs with a size satisfying 16*2 m .

[0158] For example, the MIB indicating whether the first family of SCSs is enabled includes: the MIB includes first indication information, where the first indication information is used to indicate that the first family of SCSs is enabled; and / or the MIB includes second indication information, where the second indication information is used to indicate that the first family of SCSs is not enabled.

[0159] For example, the MIB indicating whether the first family of SCSs is enabled includes: the MIB indicates whether the first family of SCSs is enabled to use; or the MIB indicates whether the first family of SCSs is permitted; or the MIB indicates whether the first family of SCSs is authorized; or the MIB indicates whether the first family of SCSs is activated.

[0160] In some possible implementation manners, a time domain position of the SSS and / or the PSS in the SSB has an association relationship with a parameter value corresponding to the second SCS; or the first SCS has an association relationship with a parameter value corresponding to the second SCS; or the MIB in the SSB has an association relationship with a parameter value corresponding to the second SCS; where the parameter value corresponding to the second SCS includes a value of m corresponding to the second SCS.

[0161] For example, the association relationship is predefined by a protocol; or the association relationship is a result of negotiation between the terminal device and the network device; or the association relationship is informed to the terminal device by the network device through signaling; or other determination manners, which are not limited by the embodiments of the present application.

[0162] In some possible implementation manners, a time domain position of the SSS and / or the PSS in the SSB has an association relationship with a size of the second SCS satisfying 15*2 n or 16*2 m ; or the first SCS has an association relationship with a size of the second SCS satisfying 15*2 n or 16*2 m ; or the MIB in the SSB has an association relationship with a size of the second SCS satisfying 15*2 n or 16*2 m .

[0163] In some possible implementation manners, a time domain position of the SSS in the SSB has an association relationship with the first SCS.

[0164] For example, when the time domain position of the SSS is the first position, the size of the first SCS satisfies 15*2 n ; or, when the time domain position of the SSS is the second position, the size of the first SCS satisfies 16*2 m .

[0165] For example, the association relationship is predefined by a protocol, or the association relationship is a result of negotiation between the terminal device and the network device, or the association relationship is informed to the terminal device by the network device through signaling, or other determination manners, which are not limited by the embodiments of the present application.

[0166] For example, the transceiver unit can be referred to as a transceiver, and / or the processing unit can be referred to as a processor.

[0167] In a ninth aspect, a communication apparatus is provided, which has the function of implementing the method in the first aspect to the fourth aspect and any possible implementation manner thereof, for example, the communication apparatus includes a module or unit or means corresponding to the operation involved in the method in the first aspect to the fourth aspect and any possible implementation manner thereof, which can be implemented by software, or by hardware, or by a combination of software and hardware.

[0168] In a tenth aspect, a communication apparatus is provided, which includes one or more processors. The one or more processors can execute part or all of the necessary computer programs or instructions stored in the memory to implement the functions involved in the method in the first aspect to the fourth aspect and any possible implementation manner thereof, when the computer programs or instructions are executed, so that the communication apparatus implements the method in the first aspect to the fourth aspect and any possible implementation manner thereof.

[0169] In some possible implementation manners, the communication apparatus can further include an interface circuit, wherein the processor is configured to communicate with other apparatuses or components through the interface circuit.

[0170] In some possible implementation manners, the communication apparatus can further include the memory.

[0171] The communication apparatus can be a terminal, or a communication module in the terminal, or a chip responsible for communication function such as a Modem chip (also known as a baseband chip) or a SoC or SIP chip containing a modem module in the terminal.

[0172] In an eleventh aspect, a communication apparatus is provided, which includes a processor configured to execute computer instructions to cause the apparatus to perform the method in the first aspect to the fourth aspect and any possible implementation manner thereof.

[0173] In some possible implementation manners, the apparatus further includes a memory.

[0174] In some possible implementation manners, the apparatus further includes a communication interface coupled to the processor, the communication interface configured to input and / or output information.

[0175] In a twelfth aspect, a computer program product is provided, which, when the computer program in the computer program product is executed by a communication apparatus, implements the method in the first aspect to the fourth aspect and any possible implementation manner thereof.

[0176] In a thirteenth aspect, a computer-readable storage medium is provided, which stores a computer program or instructions, when the computer program or instructions are executed by a communication apparatus, implements the method in the first aspect to the fourth aspect and any possible implementation manner thereof.

[0177] In a fourteenth aspect, a chip (or chip system) is provided, which includes at least one processor configured to execute a computer program, so that the apparatus installed with the chip executes the method in the first aspect to the fourth aspect and any possible implementation manner thereof.

[0178] The chip can include an output circuit or interface for sending information or data, and an input circuit or interface for receiving information or data.

[0179] In a fifteenth aspect, a communication system is provided, which includes a network device and a terminal device, the terminal device is configured to execute the method in the first aspect to the second aspect and any possible implementation manner thereof, and the network device is configured to execute the method in the third aspect to the fourth aspect and any possible implementation manner thereof. BRIEF DESCRIPTION OF DRAWINGS

[0180] FIG. 1 is a schematic diagram of a wireless communication system suitable for embodiments of the present application.

[0181] FIG. 2 is a schematic diagram of a communication system suitable for embodiments of the present application.

[0182] FIG. 3 is a schematic diagram of a communication system suitable for embodiments of the present application.

[0183] FIG. 4 is a schematic diagram of a symbol in different subcarrier spacings in an NR system according to an embodiment of the present application.

[0184] FIG. 5 is a schematic diagram of a symbol in an LTE-FDD system according to an embodiment of the present application.

[0185] FIG. 6 is a schematic diagram of a symbol in an LTE-TDD system according to an embodiment of the present application.

[0186] FIG. 7 is a structure diagram of a resource block (RB) according to an embodiment of the present application.

[0187] FIG. 8 is a structure diagram of a wireless frame according to an embodiment of the present application. s

[0188] FIG. 9 is a structure diagram of an SSB symbol according to an embodiment of the present application.

[0189] FIG. 10 is a diagram of a communication method according to an embodiment of the present application.

[0190] FIG. 11 is a diagram of a symbol according to an embodiment of the present application.

[0191] FIG. 12 is a schematic block diagram of a communication apparatus according to an embodiment of the present application.

[0192] FIG. 13 is a schematic block diagram of a communication apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0193] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0194] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be limiting of the present application. As used in the specification and the appended claims of the application, the singular forms “a,” “an” and “the” are intended to include both the singular and the plural forms, unless the context clearly indicates otherwise. It will be further understood that the terms “at least one,” “one or more,” as used in the following specification and claims indicate that there is one or more of the stated features or components. The term “ / ” generally indicates a “or” relationship between the associated objects.

[0195] Reference in the specification to “one embodiment” or “some embodiments” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrases “in one embodiment,” “in some embodiments,” “in other embodiments,” “in additional embodiments,” and the like in the specification are not necessarily all referring to the same embodiment, unless otherwise specifically stated. The terms “including,” “containing,” “having,” and variations thereof mean “including but not limited to,” unless expressly specified otherwise.

[0196] ​The technical solutions provided in the present application can be applied to various communication systems, for example: a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, a wireless local area network (WLAN) system, a narrow band-internet of things (NB-IoT) system, a global system for mobile communications (GSM), an enhanced data rate for GSM evolution (EDGE), a wideband code division multiple access (WCDMA) system, a code division multiple access 2000 (CDMA2000) system, a time division-synchronization code division multiple access (TD-SCDMA) system, a 5th generation (5G) or new radio (NR) system, three application scenarios of a 5G mobile communication system, and future mobile communication systems, future network architectures, future evolution systems, and the like. The 5G mobile communication system can be non-standalone (NSA) or standalone (SA), and the three application scenarios of the 5G mobile communication system include: enhanced mobile broadband (eMBB), ultra-reliable low latency communication (URLLC), and enhanced machine type communication (eMTC).

[0197] The technical solutions provided in the application can also be applied to a satellite communication system, a future communication system, or a fusion system of multiple systems, etc. The technical solutions provided in the application can also be applied to device to device (D2D) communication, vehicle-to-everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), and internet of things (IoT) communication system or other communication systems.

[0198] FIG. 1 is a schematic diagram of a wireless communication system 100 applicable to embodiments of the application. As shown in FIG. 1, the wireless communication system includes a radio access network 100. The radio access network 100 can be a radio access network in a future mobile communication system, a future network architecture, or a future evolution system, or a traditional (e.g., 5G, 4G) radio access network. One or more terminal devices (120a-120j, collectively referred to as 120) can be connected to each other or connected to one or more network devices (110a, 110b, collectively referred to as 110) in the radio access network 100. The network elements in the wireless communication system are connected through interfaces (such as NG, Xn) or air interfaces.

[0199] FIG. 1 is only a schematic diagram, and the wireless communication system can also include other devices, such as core network (CN) devices, wireless relay devices, and / or wireless backhaul devices, etc., which are not shown in FIG. 1.

[0200] A device in the communication system 100 can send a signal to another device or receive a signal from another device. The signal can include information, signaling, or data, etc. The device can also be replaced by an entity, a network entity, a communication device, a communication module, a node, a communication node, etc. The device is taken as an example for description in the application. For example, the communication system can include at least one terminal device 120 and at least one network device 110. The network device 110 can send a downlink signal to the terminal device 120, and / or the terminal device 120 can send an uplink signal to the network device 110.

[0201] In embodiments of the application, the terminal device 120 can also be referred to as a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user apparatus.

[0202] The terminal device can be a device providing voice / data, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminals are: mobile phone, tablet computer, notebook computer, palm computer, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented reality (AR) device, wireless terminal in industrial control, wireless terminal in self driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication function, computing device or other processing device connected to a wireless modem, wearable device, terminal device in a 5G network, or terminal device in a future evolved public land mobile network (PLMN), etc. The embodiments of the present application do not limit this.

[0203] By way of example and not limitation, in the embodiments of the present application, the terminal device can also be a wearable device. The wearable device can also be called a wearable smart device, which is a general term for devices that are designed and developed by applying wearable technology to daily wear, such as glasses, gloves, watches, clothing, and shoes. The wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. The wearable device is not only a hardware device, but also a powerful function realized through software support and data interaction, cloud interaction. The general wearable smart device includes a full function, large size, and can realize complete or partial functions without relying on a smart phone, such as a smart watch or smart glasses, etc., and focuses on a certain application function and needs to cooperate with other devices such as a smart phone, such as various smart wristbands, smart jewelry, etc. for monitoring vital signs.

[0204] In the embodiments of the present application, the device for implementing the function of the terminal device, i.e., the terminal device, can be a terminal device, or a device capable of supporting the terminal device to implement the function, such as a chip system or a chip, which can be installed in the terminal device. In the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0205] In the mobile communication system 100, the network device 110 in the embodiments of the present application can be a device for communicating with the terminal device, and the network device 110 can also be referred to as an access network device or a radio access network device, such as a base station. The network device in the embodiments of the present application can refer to a radio access network (RAN) node (or device) for accessing a terminal device to a wireless network. The base station can broadly cover various names in the following or be replaced by the following names, such as: Node B (NodeB), evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), primary station, secondary station, motor slide retainer (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. The base station can also refer to a communication module, modem, or chip for being disposed in the foregoing devices or apparatuses. The base station can also be a mobile switching center, a device assuming a base station function in D2D, V2X, M2M communication, a network side device in a future mobile communication system, a future network architecture, a future evolved system, etc., a device assuming a base station function in a future communication system, etc. The base station can support networks of the same or different access technologies. The embodiments of the present application do not limit the specific technologies and specific device forms adopted by the network device.

[0206] In some deployments, the network device mentioned in the embodiments of the present application can be a device including a CU, or a DU, or a device including a CU and a DU, or a control plane CU node (central unit-control plane (CU-CP)) and a user plane CU node (central unit-user plane (CU-UP)), and a DU node.

[0207] In different systems, the CU (or CU-CP and CU-UP), DU or radio unit (RU) can also have different names, but those skilled in the art can understand their meanings. For example, in an open RAN (ORAN) system, the CU can also be referred to as an O-CU (open CU), the DU can also be referred to as an O-DU, the CU-CP can also be referred to as an O-CU-CP, the CU-UP can also be referred to as an O-CU-UP, and the RU can also be referred to as an O-RU. Any of the CU (or CU-CP, CU-UP), DU and RU in the present application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0208] In the embodiments of the present application, the apparatus for implementing the functions of the network device can be a network device, or an apparatus capable of supporting the network device to implement the functions, such as a chip system or a chip, which can be installed in the network device. In the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0209] In the embodiments of the present application, the network device 110 can also be a device deployed on a satellite (for example, a satellite base station), or another terminal device. For example, the satellite base station can perform wireless communication with the base station deployed on the ground and / or the terminal device, or the terminal device can perform wireless communication with other terminal devices. The communication system to which the embodiments of the present application are applicable will be described below with reference to FIG. 2 and FIG. 3.

[0210] Fig. 2 is a schematic diagram of a communication system 200 applicable to the embodiments of the present application. As shown in Fig. 2, the inter-satellite link communication system 200 of a satellite includes an acquisition, pointing and tracking (APT) subsystem 210 and a communication subsystem 220. The communication subsystem 220 is responsible for transmission of inter-satellite information and is the main part of the inter-satellite communication system, and includes a communication module 221 and a transceiving antenna 222. The APT subsystem 210 is responsible for acquisition, pointing and tracking between satellites, wherein acquisition is used to determine the direction of arrival of an incident signal, pointing is used to adjust the direction of a transmitted wave to aim at a receiving direction, and tracking is used to constantly adjust pointing and acquisition during the entire communication process. In order to minimize the influence of channel attenuation and the influence of interference in the channel, while requiring high confidentiality and transmission rate, the APT subsystem 210 must be adjusted in real time to constantly adapt to changes. The APT subsystem 210 includes an APT module 211 and an APT transmitting / receiving module 212. Optionally, the APT subsystem 210 can be an optical system, and the communication subsystem 220 can be an optical communication system or a microwave band system using a single high-gain antenna. The APT subsystem 210 and the communication subsystem 220 are independent systems.

[0211] Fig. 3 is a schematic diagram of a communication system 300 applicable to the embodiments of the present application. As shown in Fig. 3, the communication system 300 includes an integrated access and backhaul (IAB) donor 310, an IAB node 320 and a terminal device 330, wherein a link between the IAB donor 310 and the IAB node 320 is a backhaul link, and a link between the terminal device 330 and the IAB node 320 is an access link.

[0212] For example, in the communication system 300, notification information, indication information or master information block (MIB) information can be transmitted between the IAB donor 310 and the IAB node 320, and / or between the IAB node 320 and the terminal device 330.

[0213] It should be understood that Figs. 1 to 3 are exemplary illustrations of the communication system applicable to the embodiments of the present application, and are only simplified schematic diagrams for the purpose of understanding. Other network devices or other terminal devices can also be included in the above communication system, which are not shown in Figs. 1 to 3. The embodiments of the present application can be applicable to any communication scenario of communication between a sending terminal device and a receiving terminal device.

[0214] The communication system to which the embodiments of the present application are applied is not limited to this, and in actual application, the embodiments of the present application are applicable to scenarios with low latency requirements, or to service scenarios with low latency and high reliability requirements.

[0215] It should also be understood that FIGS. 1 to 3 are only example application scenarios of the embodiments of the present application, and the present application is not limited to the scenarios to which the method is applied. The present application can be applicable to communication between network devices and network devices, communication between network devices and terminal devices, communication between terminal devices and terminal devices, and the like, and the embodiments of the present application are not limited thereto.

[0216] In the embodiments shown below, the method provided by the embodiments of the present application is described in detail by taking the interaction between a network device and a terminal device as an example for the sake of understanding and illustration.

[0217] To facilitate understanding of the embodiments of the present application, the terms involved in the embodiments of the present application are briefly introduced below.

[0218] 1, symbol

[0219] A symbol generally includes a cyclic prefix (CP) and a time-domain data of a period of time, and the time-domain data of the period of time can also be referred to as a useful symbol. In the embodiments of the present application, the CP is understood in a broad sense. The CP can be a section of data at the tail of a symbol copied to the head of the symbol (in this case, it can also be referred to as a cyclic prefix), can be a section of data at the head of a symbol copied to the tail of the symbol (in this case, it can also be referred to as a cyclic suffix), or can be a section of data at the head and tail of a symbol copied to the tail and head of the symbol, respectively, to form a cyclic structure, thereby resisting inter-symbol interference and the multipath delay of a channel.

[0220] FIGs. 4 to 6 are schematic diagrams of a symbol in different communication systems provided by the embodiments of the present application. FIG. 4 is a schematic diagram of a symbol in a NR system under different subcarrier spacings provided by the embodiments of the present application. FIG. 5 is a schematic diagram of a symbol in a LTE-FDD system provided by the embodiments of the present application. FIG. 6 is a schematic diagram of a symbol in a LTE-TDD system provided by the embodiments of the present application. One symbol can be contained in one time unit, and the time unit can contain a plurality of symbols. The time unit can be a mini-slot, a slot, a subframe, or a radio frame, etc., which is not limited by the embodiments of the present application. For example, as shown in FIG. 4, the small squares filled with diagonal lines in FIG. 4 represent CPs, the blank small squares represent useful symbols, one useful symbol and the CP corresponding to the useful symbol can constitute a symbol, one slot in the NR system contains 14 or 12 symbols, and the frame boundary of the subframe is aligned under different subcarrier spacings (SCS). For example, as shown in FIG. 5 or FIG. 6, in FIG. 5 or FIG. 6, the small squares filled with horizontal lines or the small squares filled with black dots represent CPs, the blank small squares represent useful symbols, one useful symbol and the CP corresponding to the useful symbol can constitute a symbol, and one slot in the LTE system contains 7 or 6 symbols. In the LTE system, the terminal can obtain the slot boundary through the primary synchronization signal (PSS), determine whether the synchronization signal block (SSB) uses the normal CP (NCP) or the extended CP (ECP) by detecting the symbol position of the secondary synchronization signal (SSS), and determine whether the LTE system is TDD or FDD, and use the fixed CP length in the communication. As shown in FIG. 5 or FIG. 6, the time length of one radio frame is 10 ms, and one radio frame can contain 10 subframes of 1 ms, and each subframe can be numbered from 0 to 9. In the LTE-FDD system, the PSS is located in the last symbol of the first slot of the subframe 0 and the subframe 5 of each radio frame, the SSS is located in the second last symbol of the first slot of the subframe 0 and the subframe 5 of each radio frame, that is, the SSS and the PSS are transmitted in the same slot of the same subframe, and the SSS is located in the symbol before the PSS. In the LTE-TDD system, the PSS is located in the third symbol of the subframe 1 and the subframe 6 of each radio frame, and the SSS is located in the last symbol of the subframe 0 and the subframe 5 of each radio frame.

[0221] In the embodiment of the present application, "one symbol" can also be expressed as "one time domain symbol", and the "time domain continuous signal of one symbol" can be expressed as "the time domain continuous signal of one time domain symbol". For the convenience of description, the following is uniformly expressed as "one symbol" and "one symbol's time domain continuous signal".

[0222] It should be noted that when an inverse Fourier transform is used to generate a time-continuous signal, the symbol is called an orthogonal frequency division multiplexing (OFDM) symbol. For example, in an LTE system, a time slot may contain 6 or 7 consecutive OFDM symbols, and in an NR system, a time slot may contain 12 or 14 consecutive OFDM symbols.

[0223] It should also be noted that, in the embodiment of the present application, the time domain continuous signal of one symbol can be understood as the signal sent by the transmitter on one symbol.

[0224] 2. SCS

[0225] In the NR system, the SCS can be configured by the parameter μ, and the corresponding SCS is Δf = 2 μ 15kHz, where μ can be an integer such as 0, 1, 2, 3, or 4. When the number of fast Fourier transform samples (FFT size) in NR is 4096, the sampling time T c =1 / (Δf max ·N f );where Δf max is the maximum SCS, N f When FFT size = 4096, the maximum bandwidth supported is 400MHz, that is, 275 resource blocks (RBs). When one RB corresponds to 12 SCSs, 275 RBs correspond to 3300 SCSs. max =480kHz, supported T c =0.509ns.

[0226] Multiple sizes of SCS are supported in NR protocol, such as 15 kHz, 30 kHz, 60 kHz, 120 kHz, 240 kHz and 480 kHz. The corresponding useful symbol length under each SCS is 1 / Δf. For example, the useful symbol length under 15 kHz is 66.7 μs, the useful symbol length under 30 kHz is 33.3 μs, the useful symbol length under 60 kHz is 16.7 μs, the useful symbol length under 120 kHz is 8.33 μs, the useful symbol length under 240 kHz is 4.17 μs, and so on. The carrier bandwidth of millimeter wave is usually large, and the Doppler frequency offset is also large, so the high frequency spectrum carrier is suitable for a larger SCS, and the anti-Doppler frequency offset performance of the larger SCS is better.

[0227] FIG. 7 is a structure diagram of a resource block (RB) provided by an embodiment of the present application. In the time domain, the minimum resource granularity is one OFDM symbol, and in the frequency domain, the minimum resource granularity is one subcarrier (SC). One OFDM symbol and one SC constitute a time-frequency resource unit, called a resource element (RE), and the physical layer performs resource mapping in RE as a basic unit.

[0228] The RB is a concept of frequency domain resource, and one RB can include one or more SCs. As shown in FIG. 7, the blank small squares without filling are SCs, and one RB includes 12 SCs when the SCS is 15 kHz.

[0229] 3, CP

[0230] Different CP lengths can be set for different SCS to resist inter-symbol interference and the multipath time delay of a channel. In NR, the CP length, the symbol duration (which can also be referred to as the useful symbol length), and the number of symbols in each slot are set for each SCS, as shown in Table 1.

[0231] Table 1

[0232] When Δf = 60 kHz, NCP or ECP can be configured to meet different time delay requirements. When NCP is used, there are 14 symbols in one slot, and when ECP is used, there are 12 symbols in one slot.

[0233] FIG. 8 is a structure diagram of a sampling point T sFigure 4 is a schematic diagram of a radio frame structure under a unit. As shown in Figure 4, Figure 8 and Table 1, the time length of one radio frame is 10 ms, one subframe contains one slot when the SCS is 15 kHz, one subframe contains two slots when the SCS is 30 kHz, and one subframe contains four slots when the SCS is 60 kHz. The effective symbol length is 2n sampling points (basic time unit), and the CP and the SCS have a corresponding relationship. In Figure 4 and Figure 8, NCP is used under different SCS, and each slot contains 14 symbols.

[0234] 4. SSB

[0235] The SSB can also be referred to as a synchronization signal / physical broadcast channel (PBCH) block. Figure 9 is a schematic diagram of a structure of an SSB symbol provided by an embodiment of the present application. The SSB is one of the most important pilot channels used in 5G, and can be used for UE access to a cell, such as cell search, beam measurement, beam selection and beam recovery, and can also be referred to as a synchronization signal block, a synchronization signal or a PBCH block. In 5G, the SSB includes a synchronization signal (SS), a physical broadcasting channel (PBCH) and a demodulation reference signal (DMRS), wherein the SS includes a PSS and an SSS. Specifically, the time-frequency domain structure of the SSB is shown in Figure 9, wherein the small square filled with diagonal lines is the PSS, the small square filled with vertical lines is the SSS, the small square filled with black dots is the PBCH, and the small square filled with vertical and horizontal lines is the PBCH DMRS. The SSB occupies 4 OFDM symbols in the time domain and 20 RBs in the frequency domain, i.e. 240 subcarriers. The first symbol carries the PSS, which includes 127 subcarriers, i.e. the PSS sequence length is 127, and the PSS only occupies the middle part of the SSB frequency domain, and no other data or control information is transmitted on both sides; the second and fourth symbols are PBCHs, which mainly carry system information; the third symbol carries the PBCH and the SSS, wherein the SSS sequence length is the same as the PSS, i.e. 127, and both occupy 127 resource elements in the middle of the SSB frequency domain.

[0236] An SSB can be classified into a cell-defining SSB (CD-SSB) and a non-cell-defining SSB (NCD-SSB). If an SSB is associated with RMSI, such SSB is referred to as a CD-SSB. A CD-SSB corresponds to one cell, which is identified by a unique NR cell global identifier (NCGI).

[0237] The PBCH carries MIB information, which is used to indicate whether a control resource set (CORESET) #0 exists. If the MIB indicates that the CORESET #0 exists, it means that the SSB is a CD-SSB. The terminal device can determine the CORESET #0 and Type0-PDCCH CSS (Type0-physical downlink control channel common search space) through a parameter (pdcch-ConfigSIB1) in the MIB information. The CORESET #0 is a CORESET associated with the Type0-PDCCH CSS, and the terminal device monitors a PDCCH that schedules a PDSCH carrying SIB1 (also referred to as RMSI) on the CORESET #0. Specifically, the PDCCH is used to schedule the PDSCH carrying SIB1. The Type0-PDCCH CSS is also referred to as search space 0, search space set 0, or search space set with an identifier (ID) of 0. If the MIB indicates that the CORESET #0 does not exist, it means that the SSB is a NCD-SSB, i.e., the NCD-SSB is not associated with SIB1 / RMSI.

[0238] One of the functions of SSB is cell access, i.e., a terminal device can receive MIB information through SSB, thereby acquiring SIB1 associated with SSB, and accessing a cell. Since SSB includes PSS, SSS, PBCH, DMRS, it can also be used for terminal devices to perform time-frequency tracking (or time-frequency synchronization), beam management, radio resource management (RRM) measurement, radio link monitoring (RLM) measurement, channel state information (CSI) measurement, etc.

[0239] In the NR system, the terminal initially accesses CORESET#0 using NCP, and after accessing, the CP length used is indicated in the configuration of the partial bandwidth (for example, whether it is ECP is indicated).

[0240] 5、Control resource set (CORESET) and search space

[0241] The control resource set is a resource set for transmitting downlink control information, and can also be referred to as a control resource region, or a physical downlink control channel resource set.

[0242] Since the system bandwidth in NR is large (the highest frequency range 1 (FR1) can reach 100MHz, and the highest frequency range 2 (FR2) can reach 400MHz), NR encapsulates information such as the frequency range occupied by PDCCH in the frequency domain and the number of OFDM symbols occupied in the time domain in the CORESET, and encapsulates information such as the starting OFDM symbol index of PDCCH and the PDCCH monitoring period in the search space. The configuration of PDCCH includes the configuration of CORESET and the configuration of search space, and according to CORESET and search space, candidate PDCCH resources can be determined. Among them, the control resource set can include time-frequency resources, for example, in the frequency domain, it can be a certain bandwidth, or one or more subbands, or one or more resource blocks, etc.; in the time domain, it can be one or more OFDM symbols; one control resource set can be continuous or discontinuous resources in the frequency domain, for example, in the frequency domain, the control resource set includes continuous RBs or discontinuous RBs. One or more search spaces constitute a search space set. When not specifically stated, search space and search space set can be interchangeable, and they represent the same meaning.

[0243] For a network device, a control resource set can be understood as a set of resources that can be used to transmit a PDCCH; for a terminal device, the resources corresponding to the search space of the PDCCH of each terminal device belong to the control resource set. Or, the network device can determine the resources used to transmit the PDCCH from the control resource set, and the terminal device can determine the search space of the PDCCH according to the control resource set.

[0244] 6、Bandwidth part (BWP)

[0245] A BWP is a part of bandwidth within a carrier bandwidth. One BWP can be a continuous frequency resource on a carrier. A network device can configure one or more BWPs for a terminal device, and the bandwidths of different BWPs can be different. The network device can also configure different BWPs with different bandwidth sizes for different terminal devices. The network device can send activation signaling to activate one of the multiple configured BWPs. When a BWP is configured and activated, the BWP is referred to as an active BWP, and the active BWP includes an active down link (DL) BWP and an active up link (UL) BWP. A terminal device transmits data and control information in the active UL BWP and receives data and control information in the active DL BWP. In one possible implementation, in one cell, at the same time, one terminal device supports only one active uplink BWP and / or one active downlink BWP. The BWP allocated to the terminal device when initially accessing is referred to as an initial BWP. The identifier of the initial BWP is 0.

[0246] An OFDM baseband signal can be generated in the following manner.

[0247] The subcarrier spacing is configured as μ, and the OFDM symbols (numbered) The time-domain continuous signal on antenna P The following definitions are given:

[0248] wherein, is the carrier bandwidth (number of RBs) of the subcarrier spacing configuration μ. is the frequency domain starting position of the subcarrier spacing configuration μ. is the number of subcarriers included in one RB, such as 12. μ0 is the maximum value of μ.

[0249] wherein t = 0 is at the start of the subframe.

[0250] where T c = 1 (Δf max · N f ), Δf max = 480·10 3 Hz, N f = 4096. κ = T s T c = 64, where T s = 1 (Δf ref · N f,ref ), Δf ref = 15·10 3 Hz, N f,ref = 2048. where T f = (Δf max N f 100)· T c = 10 ms, T sf = (Δf max N f 1000)· T c = 1 ms.

[0251] Table 2 is the corresponding SCS and CP type when μ takes different values.

[0252] Table 2

[0253] For subcarrier spacing configuration μ, the starting position of OFDM symbol l in one subframe is:

[0254] where, may be referred to as the duration of an overall symbol (overall symbol length), is the useful symbol length, is the CP length.

[0255] For an existing wireless frame, the frame structure is fixed (i.e., the SCS is fixed), the FFT size is fixed, and the CP length corresponding to different SCSs is also fixed (the lengths of NCP and ECP are fixed and unchanged). When a wireless frame structure is determined (i.e., the SCS is determined), the CP lengths of all symbols are basically the same to meet the maximum delay spread of a cell. However, this scheme does not take into account different requirements (for example, the terminal is in different environments or positions, and the requirements for the CP are different), and the CP is not flexible enough. In the case of actual CP demand being small, a fixed larger CP is used, resulting in a larger CP overhead. In the communication process, the sampling rate is related to the BWP bandwidth, the FFT size is related to the BWP bandwidth and the SCS, and the minimum sampling rate needs to meet the Nyquist theorem. The SCS determines the OFDM symbol duration, and the symbol duration and the sampling rate determine the number of samples (i.e., the FFT size) in the symbol duration. For example, the possible values of the FFT size include 512, 1024, 2048, and 4096. The sampling rate needs to meet: sampling rate = subcarrier spacing x FFT size. For example, the sampling rate can be 122880, 61440, 30720, 15360, or 7680. When 520 subcarriers are allocated, only the FFT size of 1024 can be used for processing, and the excessive redundancy of the FFT size will lead to an increase in terminal processing complexity and a larger processing delay. In addition, the SCS and symbol length corresponding to a BWP are fixed, so multiple BWPs need to be configured under multiple SCSs, and need to be switched when the SCS changes. When CSI measurement feedback or pilot transmission (CSI-RS / SRS), sensing signal transmission, etc. are needed, the occupied resources of the signals are large, the overhead is large, the delay is large, and the communication performance is affected.

[0256] For the high-speed scenario, the performance of resisting Doppler frequency offset is not good when the SCS of 30 kHz is used, and the existing SCS of 30 kHz does not support a large bandwidth carrier, the FFT size is too large (the bandwidth is limited), and the transmission time interval (TTI) length is too long, thereby affecting the communication quality. The CP length under the existing large SCS is difficult to meet the communication requirements. For example, in the medium and large delay scenarios, the SCS of 60 kHz can support a large bandwidth, but the length of NCP cannot meet the communication requirements, and the overhead of ECP is too large (the overhead of ECP is about 20%), resulting in poor communication performance. Under the 10G frequency point, the multipath delay spread of the channel is large, and a CP with a longer length needs to be used to ensure the access coverage performance.

[0257] To solve the above problems, the embodiment of the present application provides a communication method, which can more flexibly configure the communication resources of cell access.

[0258] A communication method and apparatus are provided in the embodiments of the present application.

[0259] FIG. 10 shows a schematic diagram of a possible communication method provided in the embodiments of the present application. As shown in FIG. 10, the communication method 1000 can include the following steps:

[0260] S1001, a synchronization signal block (SSB) is transmitted or received, and a subcarrier spacing (SCS) of the SSB is a first SCS.

[0261] Specifically, when a terminal device initially accesses a cell, the terminal device can search for an SSB transmitted by a network device for initial access around a center frequency point of a frequency supported by the terminal device. After the network device transmits the SSB and the terminal device searches for the SSB, the terminal device can receive the SSB. The terminal device can further determine the SCS of the SSB.

[0262] Optionally, when the communication method 1000 is applied to a terminal device, the communication method 1000 can further include determining a second SCS for initial access according to the SSB.

[0263] Specifically, after the terminal device receives the SSB, the terminal device can determine the second SCS according to the SSB.

[0264] S1002, a system information block (SIB) is transmitted, and an SCS of the SIB is the second SCS. Alternatively, the SIB is received according to the second SCS.

[0265] Specifically, a network device can transmit a SIB for initial access, and an SCS of the SIB is the second SCS. A terminal device can receive the SIB according to the second SCS determined according to the SSB. After the terminal device acquires the SIB associated with the SSB, the terminal device can access a cell through the SIB.

[0266] For example, the SIB can include a SIB1, a SIB2, and / or a RMSI, and / or a series of SIBs.

[0267] For example, a size of the first SCS and / or the second SCS satisfies (15+x)*2 m wherein x is greater than 0 and less than 15, and m is an integer greater than or equal to 0.

[0268] For example, (15+x) is equal to 20 or 16; or (15+x) is equal to 24 or 16.

[0269] Based on the scheme provided in the embodiments of the present application, the size of the SCS is designed to satisfy (15+x)*2 m (for example, 16*2 m (for example, 24*2 m, which greatly increases the selectable values of the SCS, so that when the terminal device initially accesses the cell, flexible SCS can be selected for initial access according to the actual communication situation, which helps to flexibly configure the communication resources of cell access, so that the communication resources of cell access can better match the communication demand, thereby improving the communication performance.

[0270] Exemplarily, the size of the first SCS satisfies 15*2 n , and the size of the second SCS satisfies (15+x)*2 m ; or the size of the second SCS satisfies 15*2 n , and the size of the first SCS satisfies (15+x)*2 m ; or the size of the first SCS satisfies (15+x)*2 m , and the size of the first SCS satisfies (15+x)*2 m , the x is greater than 0 and less than 15, and the m and the n are integers greater than or equal to 0.

[0271] Exemplarily, the size of the first SCS satisfies 15*2 n , and the size of the second SCS satisfies 16*2 m ; or the size of the second SCS satisfies 15*2 n , and the size of the first SCS satisfies 16*2 m ; or the size of the first SCS satisfies 16*2 m , and the size of the first SCS satisfies 16*2 m , and the m and the n are integers greater than or equal to 0.

[0272] Based on the scheme provided in the embodiments of the present application, the size of the SCS is designed to satisfy 15*2 n or (15+x)*2 m (such as 16*2 m , and such as 24*2 m ), which greatly increases the selectable values of the SCS, so that when the terminal device initially accesses the cell, flexible SCS can be selected for initial access according to the actual communication situation, which helps to flexibly configure the communication resources of cell access, so that the communication resources of cell access can better match the communication demand, thereby improving the communication performance.

[0273] Optionally, the size of the first SCS satisfies 16*2 m , and the symbol length corresponding to the first SCS is equal to the symbol length corresponding to the SCS with the size of 15*2 m ; and / or the size of the second SCS satisfies 16*2 m, and the symbol length corresponding to the second SCS is equal to the symbol length corresponding to the SCS with the size of 15*2 m , and the symbol length corresponding to the second SCS is equal to the symbol length corresponding to the SCS with the size of 15*2

[0274] Specifically, the symbol length corresponding to the first SCS with the size satisfying 16*2 m is equal to the symbol length corresponding to the SCS with the size of 15*2 m . Since the length of the useful symbol in the symbol is proportional to the reciprocal of the subcarrier spacing, the length of the useful symbol corresponding to the SCS with the size of 15*2 m is greater than the length of the useful symbol corresponding to the SCS with the size of 16*2 m . Therefore, the length of the CP corresponding to the SCS with the size of 16*2 m is greater than the length of the CP corresponding to the SCS with the size of 15*2 m , which realizes the increase of the length of the CP.

[0275] For example, as shown in FIG. 11, which is a schematic diagram of a symbol provided by an embodiment of the present application, the length of the symbol corresponding to the first SCS with the size satisfying 16 is equal to the length of the symbol corresponding to the SCS with the size of 15. For example, in FIG. 11, the length from the starting position to the ending position of the symbol of the second symbol in the subframe with the SCS of 16 is equal to the length from the starting position to the ending position of the symbol of the second symbol in the subframe with the SCS of 16. The length of the useful symbol in the symbol of the first SCS with the size satisfying 16 is shorter than the length of the useful symbol in the symbol of the SCS with the size of 15, and the length of the CP in the symbol of the first SCS with the size satisfying 16 is longer than the length of the CP in the symbol of the SCS with the size of 15.

[0276] Based on the scheme provided by the embodiment of the present application, the symbol length corresponding to the SCS with the size satisfying 16*2 m is equal to the symbol length corresponding to the SCS with the size of 15*2 m , so that the CP corresponding to the SCS with the size satisfying 16*2 m is longer than the CP corresponding to the SCS with the size of 15*2 m , which can meet the communication demand of the longer CP, can use the flexible CP for initial access when the terminal device initially accesses the cell, helps to flexibly configure the communication resource of the cell access, so that the communication resource of the cell access can be more matched with the communication demand, thereby improving the communication performance.

[0277] Optionally, when the communication method 1000 is applied to the network device, the sending of the SSB can include: sending an MIB, the MIB being used to indicate the second SCS.

[0278] Specifically, the MIB carried in the SSB can be used to indicate the second SCS, and the terminal device can determine the second SCS according to the information indicated by the MIB.

[0279] Optionally, the second SCS for initial access is determined according to the SSB, comprising: determining the second SCS according to a master information block (MIB) in the SSB, and the size of the second SCS satisfies 16*2 m .

[0280] Optionally, the second SCS is determined according to a master information block (MIB) in the SSB, comprising: the MIB indicates the second SCS, or the MIB indicates whether to enable a first family of SCSs, and the first family of SCSs includes SCSs with sizes satisfying 16*2 m .

[0281] Specifically, the CORESET#0 for initial access can support two families of SCSs, wherein the first family of SCSs includes SCSs with sizes satisfying 16*2 m , and the second family of SCSs includes SCSs with sizes satisfying 15*2 n . The terminal device can determine the size of the second SCS according to the information indicating the CORESET#0 in the MIB, and the m and n can be unequal values.

[0282] For example, the MIB indicating whether to enable the first family of SCSs includes: the MIB includes first indication information, and the first indication information is used to indicate that the first family of SCSs is enabled; and / or, the MIB includes second indication information, and the second indication information is used to indicate that the first family of SCSs is not enabled.

[0283] For example, the MIB indicating whether to enable the first family of SCSs includes: the MIB indicates whether to enable the first family of SCSs; or the MIB indicates whether to permit the first family of SCSs; or the MIB indicates whether to authorize the first family of SCSs; or the MIB indicates whether to activate the first family of SCSs.

[0284] For example, the first family of SCSs includes SCSs with sizes satisfying 16*2 m , and the second family of SCSs includes SCSs with sizes satisfying 15*2 n . The network device can indicate the size of the second SCS satisfying 16*2 mAlternatively, the network device can signal in the MIB whether to enable the second family of SCSs via "subCarrierSpacingCommon", and the network device can further signal in the MIB whether to enable the first family of SCSs via "psubCarrierSpacingonoff". It can be understood that the first family of SCSs can be referred to as secondary SCSs, and the second family of SCSs can be referred to as primary SCSs; or the first family of SCSs can be referred to as primary SCSs, and the second family of SCSs can be referred to as secondary SCSs, and the embodiments of the present application do not limit this.

[0285] The network device can signal in the MIB the second SCS via the following signaling.

[0286] subCarrierSpacingCommon ENUMERATED {scs15or60, scs30or120},

[0287] psubCarrierSpacingonoff ENUMERATED {enable}

[0288] Alternatively

[0289] subCarrierSpacingCommon ENUMERATED {scs15or60, scs30or120, scs16or64, scs32or128}

[0290] Specifically, the network device can signal via the above signaling that the second SCS can be 15 kHz or 60 kHz, 30 kHz or 120 kHz, 16 kHz or 64 kHz, or 32 kHz or 128 kHz.

[0291] It can be understood that the above MIB indicating whether to enable the first family of SCSs, the MIB indicating whether to enable the first family of SCSs to be used, the MIB indicating whether to permit the first family of SCSs, the MIB indicating whether to authorize the first family of SCSs, the MIB indicating whether to activate the first family of SCSs, and the like, are equivalent replacements for the MIB indicating whether the first family of SCSs is used.

[0292] Based on the scheme provided in the embodiments of the present application, after receiving the SSB, the terminal device determines the second SCS via the MIB carried in the SSB, which can achieve flexible configuration of the communication resources for cell access, so that the communication resources for cell access can be more matched with the communication demand, thereby improving the communication performance.

[0293] Optionally, the second SCS for initial access determined according to the SSB can include any of the following: determining the parameter value corresponding to the second SCS according to the time domain position of the secondary synchronization signal (SSS) and / or primary synchronization signal (PSS) in the SSB, the time domain position of the SSS and / or PSS in the SSB having an association with the parameter value corresponding to the second SCS; or determining the parameter value corresponding to the second SCS according to the first SCS, the parameter value corresponding to the first SCS having an association with the parameter value corresponding to the second SCS; or determining the parameter value corresponding to the second SCS according to the MIB in the SSB, the MIB in the SSB having an association with the parameter value corresponding to the second SCS; wherein the parameter value corresponding to the second SCS includes the value of m corresponding to the second SCS.

[0294] Specifically, the CORESET#0 for initial access can support an SCS with a size satisfying 16*2 m and / or 15*2 n . The terminal device can determine the value of m of the second SCS according to the above association.

[0295] For example, the time domain position of the SSS / PSS in the SSB can have an association with the value of m of the second SCS. For example, when the SSS is located at the 3rd symbol in the SSB, or when the SSS is located at the 2nd symbol after the symbol where the PSS is located (for example, the PSS is located at the 1st symbol in the SSB, and the SSS is located at the 3rd symbol in the SSB), m takes 0; when the SSS is located at the 1st symbol in the SSB, or when the SSS is located at the 2nd symbol before the symbol where the PSS is located (for example, the PSS is located at the 3rd symbol in the SSB, and the SSS is located at the 1st symbol in the SSB), m takes 1; when the SSS is located at the 1st symbol before the symbol where the PSS is located (for example, the PSS is located at the 3rd symbol in the SSB, and the SSS is located at the 2nd symbol in the SSB), m takes 2.

[0296] It can be understood that the above association between the time domain position of the SSS / PSS in the SSB and the value of m of the second SCS is only an example, and any possible association between the time domain position of the SSS / PSS and the value of m of the second SCS can be a possible implementation of the embodiments of the present application, and the embodiments of the present application are not limited in this regard.

[0297] For example, the first SCS can have an association with the value of m of the second SCS. For example, when the size of the first SCS satisfies 15*2 n , m takes a value equal to n, i.e. m = n (for example, the size of the first SCS is 15*2 0 , and m of the second SCS is 0; the size of the first SCS is 15*2 1m of the second SCS is 1; the size of the first SCS is 15*2 2 m of the second SCS is 2.

[0298] For example, the size of the first SCS satisfies 16*2 i m=f(i), f(i) is a function with i as an independent variable (for example, m=f(i)=i+1).

[0299] It can be understood that the above-mentioned association between the value of m of the first SCS and the value of m of the second SCS is only an example, and any possible association between the value of m of the first SCS and the value of m of the second SCS can be a possible implementation manner of the embodiments of the present application, and the embodiments of the present application do not limit this.

[0300] For example, the value of n of the first SCS can have an association with the value of m of the second SCS, wherein the size of the first SCS satisfies 15*2 n or 16*2 n , and the size of the second SCS satisfies 16*2 m .

[0301] For example, the value of m of the second SCS can be the same as the value of n of the first SCS, that is, m=n. For example, the size of the first SCS satisfies 15*2 0 or 16*2 0 , and the size of the second SCS satisfies 16*2 0 ; the size of the first SCS is 15*2 1 or 16*2 1 , and the size of the second SCS satisfies 16*2 1 ; the size of the first SCS is 15*2 2 or 16*2 2 , and the size of the second SCS satisfies 16*2 2 .

[0302] For example, the value of m of the second SCS can be a function of the value of n of the first SCS, that is, m=f(n).

[0303] For example, m=f(n)=n+1, the size of the first SCS satisfies 15*2 0 or 16*2 0 , and the size of the second SCS satisfies 16*2 1 ; the size of the first SCS is 15*2 1 or 16*2 1 , and the size of the second SCS satisfies 16*2 2 ; the size of the first SCS is 15*2 2 or 16*2 2 , and the size of the second SCS satisfies 16*23 .

[0304] For example, m=f(n)=n-1, when the size of the first SCS satisfies 15*2 1 or 16*2 1 , the size of the second SCS satisfies 16*2 0 ; the size of the first SCS is 15*2 2 or 16*2 2 , the size of the second SCS satisfies 16*2 1 ; the size of the first SCS is 15*2 3 or 16*2 3 , the size of the second SCS satisfies 16*2 2 .

[0305] For example, m=f(n)=n+2, when the size of the first SCS satisfies 15*2 0 or 16*2 0 , the size of the second SCS satisfies 16*2 2 ; the size of the first SCS is 15*2 1 or 16*2 1 , the size of the second SCS satisfies 16*2 3 ; the size of the first SCS is 15*2 2 or 16*2 2 , the size of the second SCS satisfies 16*2 4 .

[0306] For example, m=f(n)=n-2, when the size of the first SCS satisfies 15*2 2 or 16*2 2 , the size of the second SCS satisfies 16*2 0 ; the size of the first SCS is 15*2 3 or 16*2 3 , the size of the second SCS satisfies 16*2 1 ; the size of the first SCS is 15*2 4 or 16*2 4 , the size of the second SCS satisfies 16*2 2 .

[0307] It can be understood that the above-mentioned relationship between n of the first SCS and m of the second SCS is only an example, and any possible relationship between n of the first SCS and m of the second SCS can be a possible implementation manner of the embodiments of the present application, and the embodiments of the present application do not limit this.

[0308] For example, the MIB in the SSB can have an association with the value of m of the second SCS. For example, when the MIB in the SSB indicates that the size of the SCS of CORESET#0 is 15*2 n , m takes a value equal to n, i.e., m = n (for example, the MIB indicates that the size of the SCS of CORESET#0 is 15*2 0 , m = 0 of the second SCS; the MIB indicates that the size of the SCS of CORESET#0 is 15*2 2 , m = 2 of the second SCS); when the MIB in the SSB indicates that the size of the SCS of CORESET#0 is 16*2 i , m = f(i), f(i) is a function with i as the argument (for example, m = f(i) = i + 1).

[0309] For example, m = f(i) = i + 1, when the MIB in the SSB indicates that the size of the SCS of CORESET#0 is 15*2 0 , the size of the second SCS satisfies 16*2 1 or 15*2 1 ; the MIB in the SSB indicates that the size of the SCS of CORESET#0 is 15*2 1 , the size of the second SCS satisfies 16*2 2 or 15*2 2 ; the MIB in the SSB indicates that the size of the SCS of CORESET#0 is 15*2 2 , the size of the second SCS satisfies 16*2 3 or 15*2 3 .

[0310] For example, m = f(i) = i - 1, when the MIB in the SSB indicates that the size of the SCS of CORESET#0 is 15*2 1 , the size of the second SCS satisfies 16*2 0 or 15*2 0 ; the MIB in the SSB indicates that the size of the SCS of CORESET#0 is 15*2 2 , the size of the second SCS satisfies 16*2 1 or 15*2 1 ; the MIB in the SSB indicates that the size of the SCS of CORESET#0 is 15*2 3 , the size of the second SCS satisfies 16*2 2 or 15*2 2 .

[0311] For example, m = f(i) = i + 2, when the MIB in the SSB indicates that the size of the SCS of CORESET#0 is 15*20 the size of the second SCS satisfies 16*2 2 or 15*2 2 ; the MIB in the SSB indicates that the size of the SCS of CORESET#0 is 15*2 1 the size of the second SCS satisfies 16*2 3 or 15*2 3 ; the MIB in the SSB indicates that the size of the SCS of CORESET#0 is 15*2 2 the size of the second SCS satisfies 16*2 4 or 15*2 4 .

[0312] For example, m=f(i)=i-2, when the MIB in the SSB indicates that the size of the SCS of CORESET#0 is 15*2 2 the size of the second SCS satisfies 16*2 0 or 15*2 0 ; the MIB in the SSB indicates that the size of the SCS of CORESET#0 is 15*2 3 the size of the second SCS satisfies 16*2 1 or 15*2 1 ; the MIB in the SSB indicates that the size of the SCS of CORESET#0 is 15*2 4 the size of the second SCS satisfies 16*2 2 or 15*2 2 .

[0313] It can be understood that the above-mentioned association between the MIB in the SSB and the value of m of the second SCS is only an example, and any possible association between the MIB in the SSB and the value of m of the second SCS can be a possible implementation manner of the embodiments of the present application, and the embodiments of the present application do not limit this.

[0314] Based on the scheme provided in the embodiments of the present application, after receiving the SSB, the terminal device determines the value of m corresponding to the second SCS through the time domain position of the SSS and / or the PSS in the SSB, the first SCS, or the association between the MIB and the value of m corresponding to the second SCS, which can realize flexible configuration of the communication resources for cell access, so that the communication resources for cell access can be more matched with the communication demand, thereby improving the communication performance.

[0315] Exemplarily, the association relationship can be predefined by a protocol, or the association relationship can be a result of negotiation between the terminal device and the network device, or the association relationship can be a result of negotiation between the IAB node 320 and the IAB parent node 310, or the association relationship can be informed by the network device to the terminal device through signaling, or other determination manners, which are not limited by the embodiments of the present application.

[0316] Optionally, the second SCS for initial access determined according to the SSB can include any of the following: determining the size of the second SCS according to the time domain position of the secondary synchronization signal SSS and / or the primary synchronization signal PSS in the SSB satisfies 15*2 n or 16*2 m ; determining the size of the second SCS according to the first SCS satisfies 15*2 n or 16*2 m ; or determining the size of the second SCS according to the MIB in the SSB satisfies 15*2 n or 16*2 m .

[0317] Specifically, the CORESET#0 of initial access can support SCS with a size satisfying 16*2 m and / or 15*2 n . The terminal device can determine the size of the second SCS according to the above association relationship to satisfy 15*2 n or 16*2 m .

[0318] Exemplarily, the time domain position of SSS / PSS in the SSB can have an association relationship with the size of the second SCS satisfying 15*2 n or 16*2 m . For example, when the SSS is located in the 3rd symbol of the SSB, or when the SSS is located in the 2nd symbol after the symbol where the PSS is located (for example, the PSS is located in the 1st symbol of the SSB, and the SSS is located in the 3rd symbol of the SSB), the size of the second SCS satisfies 15*2 n ; when the SSS is located in the 2nd symbol of the SSB, or when the SSS is located in the 1st symbol after the symbol where the PSS is located (for example, the PSS is located in the 1st symbol of the SSB, and the SSS is located in the 2nd symbol of the SSB), the size of the second SCS satisfies 16*2 m .

[0319] It can be understood that the above-mentioned time domain position of SSS / PSS in SSB and the size of the second SCS have a correlation relationship only as an example, and any possible time domain position of SSS / PSS and the size of the second SCS can be a possible implementation manner of the embodiments of the present application, and the embodiments of the present application do not limit this.

[0320] For example, the size of the first SCS and the size of the second SCS satisfy 15*2 n or 16*2 m . For example, when the size of the first SCS satisfies 15*2 n , the size of the second SCS satisfies 16*2 m ; when the size of the first SCS satisfies 16*2 m , the size of the second SCS satisfies 15*2 n , or when the size of the first SCS satisfies 16*2 m , the size of the second SCS satisfies 16*2 m .

[0321] It can be understood that the above-mentioned time domain position of SSS / PSS in SSB and the size of the second SCS have a correlation relationship only as an example, and any possible time domain position of SSS / PSS and the size of the second SCS can be a possible implementation manner of the embodiments of the present application, and the embodiments of the present application do not limit this.

[0322] For example, the size of the first SCS and the size of the second SCS satisfy 15*2 n or 16*2 m . For example, when the size of the first SCS satisfies 15*2 n , the size of the second SCS satisfies 16*2 m ; when the size of the first SCS satisfies 16*2 m , the size of the second SCS satisfies 15*2 n , or when the size of the first SCS satisfies 16*2 m , the size of the second SCS satisfies 16*2 m .

[0323] It can be understood that the above-mentioned time domain position of SSS / PSS in SSB and the size of the second SCS have a correlation relationship only as an example, and any possible time domain position of SSS / PSS and the size of the second SCS can be a possible implementation manner of the embodiments of the present application, and the embodiments of the present application do not limit this.

[0324] Based on the scheme provided in the embodiments of the present application, after receiving the SSB, the terminal device determines the size of the second SCS to meet 15*2 n or 16*2 m by the time domain position of the SSS and / or the PSS in the SSB, the first SCS and the MIB. The communication resources for cell access can be flexibly configured, so that the communication resources for cell access can better match the communication demand, thereby improving the communication performance.

[0325] For example, the association relationship can be predefined by a protocol, or the association relationship can be the result of negotiation between the terminal device and the network device, or the association relationship can be the result of negotiation between the IAB node 320 and the IAB parent node 310, or the association relationship can be informed by the network device to the terminal device, or other determination manners, which are not limited in the embodiments of the present application.

[0326] For example, the time domain position of the SSS in the SSB has an association relationship with the first SCS.

[0327] Optionally, when the communication method 1000 is applied to the terminal device, it can further include: determining the first SCS according to the time domain position of the SSS in the SSB, wherein the time domain position of the SSS in the SSB has an association relationship with the first SCS.

[0328] Specifically, the terminal device can determine the first SCS according to the possible time domain position of the SSS in the SSB, wherein the size of the first SCS meets 15*2 n or 16*2 m , which has an association relationship with the time domain position of the SSS in the SSB.

[0329] For example, when the time domain position of the SSS is the first position, the size of the first SCS meets 15*2 n ; or when the time domain position of the SSS is the second position, the size of the first SCS meets 16*2 m .

[0330] For example, when the time domain position of the SSS is the 3rd symbol in the SSB, the size of the first SCS meets 15*2 n ; when the time domain position of the SSS is the 2nd symbol in the SSB, the size of the first SCS meets 16*2 m .

[0331] For example, when the time domain position of the SSS is the 1st symbol in the SSB, the size of the first SCS meets 15*2 n ; when the time domain position of the SSS is the 4th symbol in the SSB, the size of the first SCS meets 16*2 m .

[0332] Exemplarily, the association relationship can be predefined by a protocol, or the association relationship can be a result of negotiation between the terminal device and the network device, or the association relationship can be a result of negotiation between the IAB node 320 and the IAB parent node 310, or the association relationship can be informed by the network device to the terminal device through signaling, or other determination manners, which are not limited by the embodiments of the present application.

[0333] Based on the scheme provided in the embodiments of the present application, after receiving the SSB, the terminal device determines the value of the first SCS by detecting the time domain position of the SSS in the SSB and the association relationship between the time domain position and the value of the first SCS, which can realize the determination of the size of the first SCS.

[0334] Optionally, when the communication method 1000 is applied to the network device, before transmitting the SSB or the system information block, the method can further include: determining the size of the first SCS and / or the size of the second SCS.

[0335] Exemplarily, the determination of the size of the first SCS and / or the size of the second SCS can include: determining the size of the first SCS and / or the size of the second SCS according to the channel condition.

[0336] It can be understood that the network device can also determine the size of the first SCS and / or the size of the second SCS according to other factors, for example, the hardware configuration of the network device, and / or the hardware configuration of the terminal device, etc. The embodiments of the present application are not limited in this regard.

[0337] Exemplarily, before transmitting the SSB or the system information block, the method further includes: generating the SSB or the system information block.

[0338] Specifically, the network device can determine the size of the first SCS and / or the size of the second SCS according to the channel condition, and generate and transmit the SSB or the system information block based on the determined size of the first SCS and / or the size of the second SCS.

[0339] Exemplarily, let FFT size=2 a 3 b 5 c , a, b, c are all integers greater than or equal to 0. The size satisfies (15+x)×2 m The overall symbol of the SCS with the size of 15×2 n is aligned, and the overall symbol length is unchanged. When FFT size=2 a 3 b 5 c Compared with the existing FFT size=2 y(y is an integer greater than or equal to 0) is reduced and increased, the useful symbol length is reduced, and the CP length can be increased while keeping the sampling rate unchanged.

[0340] The technical solutions provided by the communication method of the embodiments of the present application are described in detail above in combination with FIG. 10 and FIG. 11. The communication apparatus provided by the embodiments of the present application is introduced below in combination with FIG. 12 and FIG. 13.

[0341] FIG. 12 is a schematic block diagram of a communication apparatus provided by an embodiment of the present application. As shown in FIG. 12, the apparatus 1200 can be a terminal device or a network device, or a component (for example, a unit, a module, a chip or a chip system) configured in a terminal device or a network device. The apparatus 1200 can include a transceiver unit 1210 and a processing unit 1220.

[0342] The transceiver unit 1210 can be configured to perform the transceiving-related operations performed by the terminal device or the network device in the method embodiments described above. For example, the transceiver unit 1210 can be configured to transmit or receive a synchronization signal block (SSB), and the SSB can have a first subcarrier spacing (SCS). The transceiver unit 1210 can also be configured to transmit or receive a system information block, and the system information block can have a second SCS.

[0343] The processing unit 1220 can be configured to perform the processing-related operations performed by the terminal device or the network device in the method embodiments described above. For example, the processing unit 1220 can be configured to determine a second SCS for initial access according to the SSB. The processing unit 1220 can also be configured to generate the SSB and / or the system information block.

[0344] FIG. 13 is a schematic block diagram of a communication apparatus provided by an embodiment of the present application. As shown in FIG. 13, the apparatus 1300 can include a processor 1310 and a transceiver 1330. The apparatus 1300 can also include a memory 1320 that stores one or more programs, which when executed by the processor 1310, cause the communication method as described in any of the possible implementation manners described above to be performed.

[0345] For example, the apparatus 1300 can be configured to perform the method 1000 described above.

[0346] It can be understood that in the apparatus of FIG. 13, the processor 1310 can include one or more processors; the memory 1320 can include one or more memories; and the transceiver 1330 can include one or more transceivers. The embodiments of the present application do not make any limitation in this regard.

[0347] The embodiment of the present application further provides a chip, which comprises a processor and a communication interface, the communication interface is used for receiving a signal and transmitting the signal to the processor, and the processor processes the signal, so that the communication method as described in any one of the possible implementation manners is executed.

[0348] The embodiment of the present application further provides a computer storage medium, which stores computer instructions, when the computer instructions are executed on an electronic device, the electronic device executes the related method steps to implement the communication method in the above embodiment.

[0349] The embodiment of the present application further provides a computer program product, when the computer program product is executed on a computer, the computer executes the related steps to implement the communication method in the above embodiment.

[0350] In addition, the embodiment of the present application further provides an apparatus, which can be a chip, a component or a module, and the apparatus can comprise a processor and a memory connected to each other, wherein the memory is used for storing computer execution instructions, and when the apparatus is running, the processor can execute the computer execution instructions stored in the memory, so that the chip executes the communication method in the above method embodiments.

[0351] The electronic device, the computer storage medium, the computer program product or the chip provided by the embodiment of the present application are all used for executing the corresponding method provided above, and thus the beneficial effects that can be achieved are referable to the beneficial effects in the corresponding method provided above, which will not be described herein again.

[0352] Those skilled in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software mode depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0353] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, apparatus and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described herein again.

[0354] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other manners. For example, the described device embodiments are merely schematic. The division of the units is merely logical function division. There can be other division manners in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0355] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0356] In addition, each functional unit in the various embodiments of the present application can be integrated into a processing unit, or each unit can be a physically separate unit, or two or more units can be integrated into one unit.

[0357] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of a software product, and the computer software product is stored in a storage medium, and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various program code storage media.

[0358] The above is merely specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A communication method, characterized in that: The method comprises: receiving a synchronization signal block SSB, where a subcarrier spacing SCS of the SSB is a first SCS; Determining a second SCS for initial access according to the SSB; receiving a system information block according to the second SCS; The size of the first SCS satisfies 15*2 n , and the size of the second SCS satisfies 16*2 m ; Or, the size of the second SCS satisfies 15*2 n , and the size of the first SCS satisfies 16*2 m ; Or, the size of the first SCS satisfies 16*2 m , and the size of the first SCS satisfies 16*2 m , said m and said n are integers greater than or equal to 0.

2. The method according to claim 1, characterized in that The size of the first SCS satisfies 16*2 m , and the symbol length corresponding to the first SCS and the size of the SCS are 15*2 m The corresponding symbols are of equal length; and / or, The size of the second SCS satisfies 16*2 m , and the symbol length corresponding to the second SCS is the same as the size of the SCS 15*2 m The corresponding symbols are equal in length; The symbol length includes the useful symbol length and the cyclic prefix CP length.

3. The method according to claim 1 or 2, characterized in that The determining, according to the SSB, a second SCS for initial access includes: The second SCS is determined according to the master information block MIB in the SSB, and the size of the second SCS satisfies 16*2 m .

4. The method according to claim 3, characterized in that Determining the second SCS according to a master information block MIB in the SSB includes: The MIB indicates the second SCS, or The MIB indicates whether to enable the first family of SCSs, wherein the first family of SCSs includes a size that satisfies 16*2 m of SCS.

5. The method according to any one of claims 1 to 4, characterized in that The determining, according to the SSB, a second SCS for initial access includes any one of the following: Determine the parameter value corresponding to the second SCS according to the time domain position of the secondary synchronization signal SSS and / or the primary synchronization signal PSS in the SSB, and the time domain position of the SSS and / or PSS in the SSB is associated with the parameter value corresponding to the second SCS; or Determine the parameter value corresponding to the second SCS according to the first SCS, and the parameter values ​​corresponding to the first SCS and the second SCS are associated; or Determine a parameter value corresponding to the second SCS according to the MIB in the SSB, where the MIB in the SSB is associated with the parameter value corresponding to the second SCS; Among them, the parameter values ​​corresponding to the second SCS include the value of m corresponding to the second SCS.

6. The method according to any one of claims 1 to 5, characterized in that The determining, according to the SSB, a second SCS for initial access includes any one of the following: The size of the second SCS is determined to meet 15*2 according to the time domain position of the secondary synchronization signal SSS and / or the primary synchronization signal PSS in the SSB. n or 16*2 m ; Determine based on the first SCS that the size of the second SCS satisfies 15*2 n or 16*2 m ; or, Determine according to the MIB in the SSB that the size of the second SCS satisfies 15*2 n or 16*2 m .

7. The method according to any one of claims 1 to 6, characterized in that The method further comprises: The first SCS is determined according to the time domain position of the SSS in the SSB, wherein the time domain position of the SSS in the SSB is associated with the first SCS.

8. A communication method, characterized in that: The method comprises: Sending an SSB, where the SCS of the SSB is a first SCS; Sending a system information block, where the SCS of the system information block is a second SCS; The size of the first SCS satisfies 15*2 n , and the size of the second SCS satisfies 16*2 m ; Or, the size of the second SCS satisfies 15*2 n , and the size of the first SCS satisfies 16*2 m ; Or, the size of the first SCS satisfies 16*2 m , and the size of the first SCS satisfies 16*2 m , said m and said n are integers greater than or equal to 0.

9. The method according to claim 8, characterized in that The size of the first SCS satisfies 16*2 m , and the symbol length corresponding to the first SCS and the size of the SCS are 15*2 m The corresponding symbols are of equal length; and / or, The size of the second SCS satisfies 16*2 m , and the symbol length corresponding to the second SCS is the same as the size of the SCS 15*2 m The corresponding symbols are equal in length; The symbol length includes the useful symbol length and the CP length.

10. The method according to claim 8 or 9, characterized in that The sending of SSB includes: Send MIB, where the MIB is used to indicate the second SCS.

11. The method according to claim 10, characterized in that The MIB is used to indicate the second SCS, including: The MIB indicates the second SCS, or The MIB indicates whether to enable the first family of SCSs, wherein the first family of SCSs includes a size that satisfies 16*2 m of SCS.

12. The method according to any one of claims 8 to 11, characterized in that The time domain position of the SSS and / or PSS in the SSB is associated with the parameter value corresponding to the second SCS; or The parameter values ​​corresponding to the first SCS and the second SCS are associated; or The MIB in the SSB is associated with the parameter value corresponding to the second SCS; Among them, the parameter values ​​corresponding to the second SCS include the value of m corresponding to the second SCS.

13. The method according to any one of claims 8 to 12, characterized in that The time domain position of the SSS and / or PSS in the SSB and the size of the second SCS satisfy 15*2 n or 16*2 m have an associated relationship; or The size of the first SCS and the second SCS meets 15*2 n or 16*2 m have an associated relationship; or The size of the MIB in the SSB and the second SCS meets 15*2 n or 16*2 m Have an associated relationship.

14. The method according to any one of claims 8 to 13, characterized in that The time domain position of the SSS in the SSB is associated with the first SCS.

15. A communication device, characterized in that: The device comprises: a transceiver unit, configured to receive an SSB, wherein a subcarrier spacing SCS of the SSB is a first SCS; a processing unit, configured to determine a second SCS for initial access according to the SSB; The transceiver unit is further configured to: receive a system information block according to the second SCS; The size of the first SCS satisfies 15*2 n , and the size of the second SCS satisfies 16*2 m ; Or, the size of the second SCS satisfies 15*2 n , and the size of the first SCS satisfies 16*2 m ; Or, the size of the first SCS satisfies 16*2 m , and the size of the first SCS satisfies 16*2 m , said m and said n are integers greater than or equal to 0.

16. The device according to claim 15, characterized in that The size of the first SCS satisfies 16*2 m , and the symbol length corresponding to the first SCS and the size of the SCS are 15*2 m The corresponding symbols are of equal length; and / or, The size of the second SCS satisfies 16*2 m , and the symbol length corresponding to the second SCS is the same as the size of the SCS 15*2 m The corresponding symbols are equal in length; The symbol length includes the useful symbol length and the CP length.

17. The device according to claim 15 or 16, characterized in that The determining, according to the SSB, a second SCS for initial access includes: The second SCS is determined according to the master information block MIB in the SSB, and the size of the second SCS satisfies 16*2 m .

18. The device according to claim 17, characterized in that Determining the second SCS according to a master information block MIB in the SSB includes: The MIB indicates the second SCS, or The MIB indicates whether to enable the first family of SCSs, wherein the first family of SCSs includes a size that satisfies 16*2 m of SCS.

19. The device according to any one of claims 15 to 18, characterized in that The determining, according to the SSB, a second SCS for initial access includes any one of the following: Determine the parameter value corresponding to the second SCS according to the time domain position of the secondary synchronization signal SSS and / or the primary synchronization signal PSS in the SSB, and the time domain position of the SSS and / or PSS in the SSB is associated with the parameter value corresponding to the second SCS; or Determine the parameter value corresponding to the second SCS according to the first SCS, and the parameter values ​​corresponding to the first SCS and the second SCS are associated; or Determine a parameter value corresponding to the second SCS according to the MIB in the SSB, where the MIB in the SSB is associated with the parameter value corresponding to the second SCS; Among them, the parameter values ​​corresponding to the second SCS include the value of m corresponding to the second SCS.

20. The device according to any one of claims 15 to 19, characterized in that The determining, according to the SSB, a second SCS for initial access includes any one of the following: The size of the second SCS is determined to meet 15*2 according to the time domain position of the secondary synchronization signal SSS and / or the primary synchronization signal PSS in the SSB. n or 16*2 m ; Determine based on the first SCS that the size of the second SCS satisfies 15*2 n or 16*2 m ; or, Determine according to the MIB in the SSB that the size of the second SCS satisfies 15*2 n or 16*2 m .

21. The device according to any one of claims 15 to 20, characterized in that The processing unit is further configured to: The first SCS is determined according to the time domain position of the SSS in the SSB, wherein the time domain position of the SSS in the SSB is associated with the first SCS.

22. A communication device, characterized in that: The device comprises: a transceiver unit, configured to send an SSB, wherein a subcarrier spacing SCS of the SSB is a first SCS; The transceiver unit is further configured to: send a system information block, wherein the SCS of the system information block is a second SCS; The size of the first SCS satisfies 15*2 n , and the size of the second SCS satisfies 16*2 m ; Or, the size of the second SCS satisfies 15*2 n , and the size of the first SCS satisfies 16*2 m ; Or, the size of the first SCS satisfies 16*2 m , and the size of the first SCS satisfies 16*2 m , said m and said n are integers greater than or equal to 0.

23. The device according to claim 22, characterized in that The size of the first SCS satisfies 16*2 m , and the symbol length corresponding to the first SCS and the size of the SCS are 15*2 m The corresponding symbols are of equal length; and / or, The size of the second SCS satisfies 16*2 m , and the symbol length corresponding to the second SCS is the same as the size of the SCS 15*2 m The corresponding symbols are equal in length; The symbol length includes the useful symbol length and the CP length.

24. The device according to claim 22 or 23, characterized in that The sending of SSB includes: Send MIB, where the MIB is used to indicate the second SCS.

25. The device according to claim 24, characterized in that The MIB is used to indicate the second SCS, including: The MIB indicates the second SCS, or The MIB indicates whether to enable the first family of SCSs, wherein the first family of SCSs includes a size that satisfies 16*2 m of SCS.

26. The device according to any one of claims 22 to 25, characterized in that The time domain position of the SSS and / or PSS in the SSB is associated with the parameter value corresponding to the second SCS; or The parameter values ​​corresponding to the first SCS and the second SCS are associated; or The MIB in the SSB is associated with the parameter value corresponding to the second SCS; Among them, the parameter values ​​corresponding to the second SCS include the value of m corresponding to the second SCS.

27. The device according to any one of claims 22 to 26, characterized in that The time domain position of the SSS and / or PSS in the SSB and the size of the second SCS satisfy 15*2 n or 16*2 m have an associated relationship; or The size of the first SCS and the second SCS meets 15*2 n or 16*2 m have an associated relationship; or The size of the MIB in the SSB and the second SCS meets 15*2 n or 16*2 m Have an associated relationship.

28. The device according to any one of claims 22 to 27, characterized in that The time domain position of the SSS in the SSB is associated with the first SCS.

29. The device according to any one of claims 15 to 21, or the device according to any one of claims 22 to 28, characterized in that: The transceiver unit is a transceiver, and / or the processing unit is a processor.

30. A communication device, characterized in that: The device comprises: A processor, configured to execute computer instructions so that the apparatus performs: the method according to any one of claims 1 to 7, or the method according to any one of claims 8 to 14.

31. A computer program product, characterized in that When the computer program in the computer program product is executed by a communication device, the method according to any one of claims 1 to 7 or the method according to any one of claims 8 to 14 is implemented.

32. A computer-readable storage medium, characterized in that The storage medium stores a computer program or instruction. When the computer program or instruction is executed by the communication device, the method according to any one of claims 1 to 7 or the method according to any one of claims 8 to 14 is implemented.

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