Communication method and apparatus

Abstract

The application provides a communication method and device to reduce communication delay and improve communication efficiency. The method comprises: a terminal receiving first synchronization information and first information of a physical broadcast channel block (SSB) from a radio access network device, and receiving a physical downlink control channel (PDCCH) from the radio access network device according to the first information. The first information is used to indicate a first frequency domain position, the first frequency domain position is a frequency domain position of a second SSB, the first SSB and the second SSB are located in the same frequency band, the first SSB is located in a position except a synchronization raster in the frequency band, and the second SSB is located on the synchronization raster in the frequency band. The PDCCH is a PDCCH indicated for the second SSB.

Description

Technical Field

[0001] This application relates to the field of communications, and more particularly to a communication method and apparatus. Background Technology

[0002] Currently, terminals mainly obtain cell broadcast information by receiving cell synchronization information and physical broadcast channel (PBCH) block (SSB), thereby completing functions such as measurement, automatic neighbor relation (ANR) determination, cell global ID (CGI) reporting, initial cell access, cell handover, and cell reselection.

[0003] Specifically, SSBs within the same frequency band can include: SSBs located on the sync raster within that band, called on-sync raster SSBs, or simply on SSBs; and SSBs not located on the sync raster within that band, called off-sync raster SSBs, or simply off SSBs. Off SSBs are primarily used for measurement functions, and their frequency domain location can be provided to the terminal by the radio access network equipment. On SSBs are mainly used for functions such as ANR determination, CGI reporting, initial cell access, cell handover, and cell reselection after the terminal accesses the network. Their reception is primarily achieved through frequency point scanning. In other words, the terminal can receive off SSBs based on the frequency domain location information sent by the radio access network equipment, and then receive on SSBs through frequency point scanning, i.e., on the sync raster. Thus, the terminal can receive the physical downlink control channel (PDCCH) indicated by the on SSB, and complete network access and subsequent functions based on the control information carried in the PDCCH.

[0004] However, frequency scanning is usually inefficient, and the terminal may not be able to receive the PDCCH in time, resulting in increased communication latency and reduced communication efficiency. Summary of the Invention

[0005] This application provides a communication method and apparatus to reduce communication latency and improve communication efficiency.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] A first aspect provides a communication method. The method includes: a terminal receiving first synchronization information and first information of a Physical Broadcast Channel Block (SSB) from a radio access network (RAN) device, thereby receiving a downlink control channel (PDCCH) from the RAN device according to the first information. The first information indicates a first frequency domain location, which is the frequency domain location of a second SSB. The first SSB and the second SSB are located in the same frequency band, with the first SSB located at a position within the frequency band excluding the synchronization grating, and the second SSB located on the synchronization grating within the frequency band. The PDCCH is the PDCCH indicated by the second SSB.

[0008] As described in the first aspect, by indicating the frequency domain location of the second SSB (i.e., the frequency domain location of the on SSB) through the first information, the terminal can determine the frequency domain location of the PDCCH based on the frequency domain location of the second SSB. Thus, when there are multiple synchronization gratings within the frequency band, the terminal can receive the PDCCH directly at that frequency domain location without scanning other synchronization gratings or other frequency points within the band. This reduces communication latency, improves communication reliability, and increases communication efficiency, enabling the terminal to quickly complete functions such as ANR determination, CGI reporting, initial cell access, cell handover, and cell reselection.

[0009] In one possible design, the first information may include at least one of the following: the absolute frequency domain position of the second SSB, the relative frequency domain position of the second SSB, or the frequency domain position indication information of the second SSB.

[0010] Optionally, the relative frequency domain position may include: a second frequency domain offset, which is the frequency domain offset between the first SSB and the second SSB; or the frequency domain offset between the synchronization gratings where the first SSB and the second SSB are located; or the frequency domain offset between the center frequency position of the first SSB and the center frequency position of the second SSB; or the frequency domain offset between the center frequency position of the first SSB and the synchronization grating where the second SSB is located.

[0011] Furthermore, the second frequency domain offset may include at least one of the following: a frequency domain offset at the resource block (RB) granularity or a frequency domain offset at the resource element (RE) granularity, so that the second frequency domain offset is more accurate.

[0012] Optionally, the absolute frequency domain location may include: the frequency point ARFCN-New Radio (NR) value. The ARFCN-NR value is frequency domain unique, and its accuracy in indicating the frequency domain location of the second SSB can be achieved by using this value to avoid errors.

[0013] Optionally, the frequency domain location indication information of the second SSB may include at least one of the following: the global synchronization number GSCN of the synchronization grating, or the frequency domain location index of the synchronization grating.

[0014] In one possible design, the first information can also be used to indicate the subcarrier spacing (SCS) of the second SSB to ensure that the terminal can accurately determine the second frequency domain offset.

[0015] In one possible design, the first information is carried in at least one of the following within the first SSB: a Master Information Block (MIB) or measured target new radio parameters. If the first information is carried in the MIB within the first SSB, then the first information and the first SSB are transmitted together. If the first information is carried in the target new radio parameters, then the first information and the first SSB are transmitted separately. For example, the radio access network (RAN) device first transmits the target new radio parameters to the terminal, and then transmits the first SSB to the terminal. It is understood that whether the first SSB and the first information are transmitted together or separately, they occur before the RAN device transmits the PDCCH. Thus, the terminal knows the frequency domain location of the PDCCH before the RAN device transmits it, ensuring that the terminal can successfully receive the PDCCH when the RAN device transmits it, without requiring the RAN device to retransmit the PDCCH, thereby further reducing communication latency and improving communication efficiency.

[0016] In one possible design, the terminal receiving the downlink control channel (PDCCH) from the radio access network device based on the first information may include: the terminal determining the second frequency domain position of the PDCCH based on the first information and a first frequency domain offset, and then receiving the PDCCH from the radio access network device at the second frequency domain position. The first frequency domain offset is the frequency domain offset between the second SSB and the PDCCH.

[0017] Optionally, the first frequency domain offset is carried in either the first SSB or the second SSB. In other words, if the first frequency domain offset is not carried in the first SSB, the radio access network device can send a second SSB carrying the first frequency domain offset to the terminal. However, if the first frequency domain offset is carried in the first SSB, the radio access network device does not need to send the second SSB to the terminal, thereby effectively reducing communication overhead and improving communication efficiency.

[0018] Optionally, the PDCCH, the first SSB, and the second SSB are located in the same frequency band, eliminating the need for the terminal to receive the PDCCH across frequency bands. This reduces the requirements for the terminal's reception performance, thus accommodating terminals with different capabilities.

[0019] Secondly, a communication method is provided. The method includes: a radio access network device sending first synchronization information and first information of a Physical Broadcast Channel Block (SSB) to a terminal, and sending a Downlink Control Channel (PDCCH) to the terminal. The first information indicates a first frequency domain location, which is the frequency domain location of a second SSB. The first SSB and the second SSB are located in the same frequency band. The first SSB is located within the frequency band, excluding the synchronization grating, and the second SSB is located on the synchronization grating within the frequency band. The PDCCH is the PDCCH indicated by the second SSB.

[0020] In one possible design, the first information may include at least one of the following: the absolute frequency domain position of the second SSB, the relative frequency domain position of the second SSB, or the frequency domain position indication information of the second SSB.

[0021] Optionally, the relative frequency domain position may include a second frequency domain offset, which is the frequency domain offset between the first SSB and the second SSB.

[0022] Furthermore, the second frequency domain offset may include at least one of the following: a frequency domain offset at the resource block (RB) granularity, or a frequency domain offset at the resource element (RE) granularity.

[0023] Optionally, the absolute frequency domain location may include: frequency point ARFCN - new air interface NR value.

[0024] Optionally, the frequency domain location indication information may include at least one of the following: the Global Synchronization Number (GSCN) of the synchronization grating, or the frequency domain location index of the synchronization grating.

[0025] In one possible design, the first information can also be used to indicate the subcarrier spacing (SCS) of the second SSB.

[0026] In one possible design, the first information is carried in at least one of the following in the first SSB: the Master Information Block (MIB) or the new air interface parameters of the measurement target.

[0027] In one possible design, before the radio access network device sends the downlink control channel (PDCCH) to the terminal, the method described in the second aspect may further include: the radio access network device sending a first frequency domain offset to the terminal, the first frequency domain offset being the frequency domain offset between the second SSB and the PDCCH.

[0028] Optionally, the first frequency domain offset is carried in the first SSB or the second SSB.

[0029] Optionally, the PDCCH, the first SSB, and the second SSB can be located in the same frequency band.

[0030] Furthermore, the technical effects of the method described in the second aspect can be referred to the technical effects of the method described in the first aspect, and will not be repeated here.

[0031] Thirdly, a communication method is provided. The method includes: a terminal receiving first synchronization information and second information of a Physical Broadcast Channel Block (SSB) from a radio access network (RAN) device, thereby receiving a downlink control channel (PDCCH) from the RAN device according to the second information. The second information indicates a third frequency domain position, which is the frequency domain position of the PDCCH. The PDCCH is the PDCCH indicated by the second SSB. The first SSB and the second SSB are located in the same frequency band. The first SSB is located in a position within the frequency band other than the synchronization grating, and the second SSB is located on the synchronization grating within the frequency band.

[0032] Based on the method described in the third aspect, when there are multiple synchronization gratings in the frequency band, by indicating the frequency domain position of the PDCCH through the first information, the terminal can receive the PDCCH directly at the frequency domain position without scanning other synchronization gratings or other frequency points in the frequency band. This can reduce communication latency, improve communication reliability, and improve communication efficiency, enabling the terminal to quickly complete functions such as ANR determination, CGI reporting, initial cell access, cell handover, and cell reselection.

[0033] In one possible design, the third frequency domain position includes a third frequency domain offset, which is the frequency domain offset between the first SSB and the PDCCH.

[0034] Optionally, the third frequency domain offset may include at least one of the following: a frequency domain offset at the resource block (RB) granularity, or a frequency domain offset at the resource element (RE) granularity.

[0035] In one possible design, the second information is also used to indicate the subcarrier spacing of the PDCCH.

[0036] In one possible design, the second information is carried in the main information block (MIB) of the first SSB.

[0037] Optionally, before the terminal receives the downlink control channel (PDCCH) from the radio access network (RAN) device, the method in the third aspect may further include: the terminal receiving third information from the RAN device, the third information indicating that the information in the MIB indicates the frequency domain location of the PDCCH. This avoids the terminal misidentifying the frequency domain location, such as mistaking the third frequency domain location indicated by the second information as the frequency domain location of the first SSB or the second SSB, thus preventing the terminal from receiving the PDCCH and ensuring communication reliability.

[0038] In one possible design, the PDCCH, the first SSB, and the second SSB are located in the same frequency band.

[0039] Furthermore, other technical effects of the method described in the third aspect can be referred to the technical effects of the method described in the first aspect, and will not be repeated here.

[0040] Fourthly, a communication method is provided. The method includes: a radio access network device sending first synchronization information and second information of a Physical Broadcast Channel Block (SSB) to a terminal, and sending a Downlink Control Channel (PDCCH) to the terminal. The second information indicates a third frequency domain location; the first frequency domain location is the frequency domain location of the PDCCH; the PDCCH is the PDCCH indicated by the second SSB; the first SSB and the second SSB are located in the same frequency band; the first SSB is located in a position within the frequency band other than the synchronization grating; and the second SSB is located on the synchronization grating within the frequency band.

[0041] In one possible design, the third frequency domain position includes a third frequency domain offset, which is the frequency domain offset between the first SSB and the PDCCH.

[0042] Optionally, the third frequency domain offset may include at least one of the following: a frequency domain offset at the resource block (RB) granularity, or a frequency domain offset at the resource element (RE) granularity.

[0043] In one possible design, the second information is also used to indicate the subcarrier spacing of the PDCCH.

[0044] In one possible design, the second information is carried in the main information block (MIB) of the first SSB.

[0045] Optionally, before the radio access network device sends the downlink control channel (PDCCH) to the terminal, the method described in the third aspect may further include: the radio access network device sending third information to the terminal, the third information being used to indicate that the frequency domain position indicated by the information in the MIB is the frequency domain position of the PDCCH.

[0046] In one possible design, the PDCCH, the first SSB, and the second SSB are located in the same frequency band.

[0047] Furthermore, the technical effects of the method described in the fourth aspect can be referred to the technical effects of the methods described in the first and third aspects, and will not be repeated here.

[0048] Fifthly, a communication method is provided. The method includes: a terminal receiving a second synchronization information block (SSB) from a radio access network (RAN) device on a first synchronization grating, and receiving a downlink control channel (PDCCH) from the RAN device. The first synchronization grating is one of multiple synchronization gratings located in the same frequency band. The PDCCH is a PDCCH indicated by the second SSB.

[0049] Based on the method described in the fifth aspect, when there are multiple synchronization gratings in the same frequency band, the terminal can still receive the second SSB it needs to receive on the corresponding synchronization grating, such as the first synchronization grating, i.e., on SSB, to ensure that the terminal can successfully complete functions such as ANR determination, CGI reporting, initial cell access, cell handover, and cell reselection.

[0050] In one possible design, the fourth information is used to indicate the frequency domain position of the first SSB, and the first SSB and the second SSB are located within the same frequency band. Before the terminal receives the second SSB from the radio access network device on the first synchronization grating, the method in the fifth aspect may further include: the terminal receiving the fourth information from the radio access network device, determining the frequency domain positional relationship between each synchronization grating and the frequency domain position of the first SSB, so as to determine whether the second SSB from the radio access network device is received on each synchronization grating based on the frequency domain positional relationship.

[0051] Optionally, the frequency domain positional relationship can refer to the proximity of each synchronization grating to the first SSB in the frequency domain.

[0052] It should be understood that since the first SSB, i.e. off SSB, is usually located in the frequency domain close to the second SSB, the terminal prioritizes detecting the synchronization grating that is closer in the frequency domain according to the frequency domain position relationship, so that it can receive the second SSB as early as possible, so that the terminal can complete functions such as ANR determination, CGI reporting, initial cell access, cell handover, and cell reselection as soon as possible.

[0053] In one possible design, the fourth information is used to indicate the frequency domain position of the first SSB. The first SSB and the second SSB are located within the frequency band. Before the terminal receives the second SSB from the radio access network device on the first synchronization grating, the method in the fifth aspect may further include: the terminal receiving the fourth information from the radio access network device, determining the frequency domain interval between each synchronization grating and the frequency domain position of the first SSB, so as to determine whether the second SSB from the radio access network device is received on the synchronization grating corresponding to each frequency domain interval.

[0054] Optionally, the terminal determines whether it receives a second SSB from the radio access network device on the synchronization grating corresponding to each frequency domain interval, including: the terminal determines whether it receives a second SSB from the radio access network device on the synchronization grating corresponding to each frequency domain interval according to the order of the frequency domain intervals.

[0055] It should be understood that since the first SSB is usually located in the frequency domain close to the second SSB, the terminal prioritizes detecting the synchronization grating with a smaller frequency domain interval, i.e., a closer frequency domain location, according to the order of frequency domain interval size. This allows the terminal to receive the second SSB as early as possible, so that it can complete functions such as ANR determination, CGI reporting, initial cell access, cell handover, and cell reselection as soon as possible.

[0056] In one possible design, the fourth piece of information may include: the ARFCN-NR value of the first SSB. The ARFCN-NR value is frequency-domain unique, and its frequency domain location can be accurately indicated.

[0057] Sixthly, a communication method is provided. The method includes: a wireless access network device transmitting a second synchronization information block (SSB) to a terminal on a first synchronization grating, and transmitting a downlink control channel (PDCCH) to the terminal. The first synchronization grating is one of multiple synchronization gratings located in the same frequency band. The PDCCH is a PDCCH indicated by the second SSB.

[0058] In one possible design, the fourth information is used to indicate the frequency domain location of the first SSB, which is located within the same frequency band as the second SSB. Before the radio access network device sends the second synchronization information block SSB to the terminal on the first synchronization grating, the method described in the sixth aspect may further include: the radio access network device sending the fourth information to the terminal.

[0059] In one possible design, the fourth information may include: the frequency point ARFCN of the first SSB - the new radio NR value.

[0060] Furthermore, the technical effects of the method described in the sixth aspect can be referred to the technical effects of the method described in the fifth aspect, and will not be repeated here.

[0061] A seventh aspect provides a communication device. The device includes a module for performing the method described in the first aspect.

[0062] The apparatus described in the seventh aspect may include a transceiver module and a processing module. The transceiver module is configured to receive first synchronization information and first information of a Physical Broadcast Channel Block (SSB) from a radio access network device. The processing module is configured to control the transceiver module to receive a downlink control channel (PDCCH) from the radio access network device based on the first information. The first information indicates a first frequency domain position, which is the frequency domain position of a second SSB. The first SSB and the second SSB are located within the same frequency band. The first SSB is located within the frequency band, excluding the synchronization grating, and the second SSB is located on the synchronization grating within the frequency band.

[0063] In one possible design, the first information may include at least one of the following: the absolute frequency domain position of the second SSB, the relative frequency domain position of the second SSB, or the frequency domain position indication information of the second SSB.

[0064] Optionally, the relative frequency domain position may include: a second frequency domain offset, which is the frequency domain offset between the first SSB and the second SSB.

[0065] Furthermore, the second frequency domain offset may include at least one of the following: a frequency domain offset at the resource block (RB) granularity, or a frequency domain offset at the resource element (RE) granularity.

[0066] Optionally, the absolute frequency domain location may include: frequency point ARFCN - new air interface NR value.

[0067] Optionally, the frequency domain location indication information may include at least one of the following: the Global Synchronization Number (GSCN) of the synchronization grating, or the frequency domain location index of the synchronization grating.

[0068] In one possible design, the first information can also be used to indicate the subcarrier spacing (SCS) of the second SSB to ensure that the terminal can accurately determine the second frequency domain offset.

[0069] In one possible design, the first information is carried in at least one of the following in the first SSB: the main information block (MIB) or the new air interface parameters of the measurement target.

[0070] In one possible design, the processing module is further configured to determine the second frequency domain position of the PDCCH based on the first information and the first frequency domain offset. The transceiver module is further configured to receive the PDCCH from the radio access network device at the second frequency domain position. The first frequency domain offset is the frequency domain offset between the second SSB and the PDCCH.

[0071] Optionally, the first frequency domain offset is carried in the first SSB or the second SSB.

[0072] Optionally, the PDCCH, the first SSB, and the second SSB are located in the same frequency band.

[0073] Optionally, the transceiver module may also include a transmitting module and a receiving module. The transmitting module implements the transmitting function of the device described in the seventh aspect, and the receiving module implements the receiving function of the device described in the seventh aspect.

[0074] Optionally, the apparatus described in the seventh aspect may further include a storage module storing a program or instructions. When the processing module executes the program or instructions, the apparatus can perform the method described in the first aspect.

[0075] It should be noted that the device described in the seventh aspect may be a terminal, a chip (system) or other component or assembly that can be disposed in the terminal, or a device that includes the terminal. This application does not limit this.

[0076] Furthermore, the technical effects of the device described in the seventh aspect can be referred to the technical effects of the method described in the first aspect, and will not be repeated here.

[0077] Eighthly, a communication device is provided. The device includes a module for performing the method described in the second aspect.

[0078] The apparatus described in the eighth aspect may include a transceiver module, configured to send first synchronization information and first information of a Physical Broadcast Channel Block (SSB) to the terminal, and to send a Downlink Control Channel (PDCCH) to the terminal. The first information indicates a first frequency domain location, which is the frequency domain location of a second SSB. The first SSB and the second SSB are located in the same frequency band. The first SSB is located within the frequency band, excluding the synchronization grating, and the second SSB is located on the synchronization grating within the frequency band. The PDCCH is the PDCCH indicated by the second SSB.

[0079] In one possible design, the first information may include at least one of the following: the absolute frequency domain position of the second SSB, the relative frequency domain position of the second SSB, or the frequency domain position indication information of the second SSB.

[0080] Optionally, the relative frequency domain position may include a second frequency domain offset, which is the frequency domain offset between the first SSB and the second SSB.

[0081] Furthermore, the second frequency domain offset may include at least one of the following: a frequency domain offset at the resource block (RB) granularity, or a frequency domain offset at the resource element (RE) granularity.

[0082] Optionally, the absolute frequency domain location may include: frequency point ARFCN - new air interface NR value.

[0083] Optionally, the frequency domain location indication information may include at least one of the following: the Global Synchronization Number (GSCN) of the synchronization grating, or the frequency domain location index of the synchronization grating.

[0084] In one possible design, the first information can also be used to indicate the subcarrier spacing (SCS) of the second SSB.

[0085] In one possible design, the first information is carried in at least one of the following in the first SSB: the Master Information Block (MIB) or the new air interface parameters of the measurement target.

[0086] In one possible design, the transceiver module is further configured to send a first frequency domain offset to the terminal before sending the downlink control channel PDCCH to the terminal. The first frequency domain offset is the frequency domain offset between the second SSB and the PDCCH.

[0087] Optionally, the first frequency domain offset is carried in the first SSB or the second SSB.

[0088] Optionally, the PDCCH, the first SSB, and the second SSB can be located in the same frequency band.

[0089] Optionally, the transceiver module may also include a sending module and a receiving module. The sending module implements the sending function of the device described in the eighth aspect, and the receiving module implements the receiving function of the device described in the eighth aspect.

[0090] Optionally, the apparatus described in the eighth aspect may further include a processing module. The processing module is used to implement the processing functions of the apparatus.

[0091] Optionally, the apparatus described in the eighth aspect may further include a storage module storing a program or instructions. When the processing module executes the program or instructions, the apparatus can perform the method described in the second aspect.

[0092] It should be noted that the device described in the eighth aspect may be a network device, or a chip (system) or other component or assembly that can be disposed in a network device, or a device that includes a network device. This application does not limit this.

[0093] Furthermore, the technical effects of the device described in the eighth aspect can be referred to the technical effects of the method described in the second aspect, and will not be repeated here.

[0094] A ninth aspect provides a communication device. The device includes a module for performing the method described in the third aspect.

[0095] The apparatus described in the ninth aspect may include a transceiver module and a processing module. The transceiver module is configured to receive a first synchronization information block (SSB) and second information from a radio access network device. The processing module is configured to receive a downlink control channel (PDCCH) from the radio access network device based on the second information. The second information indicates a third frequency domain position, which is the frequency domain position of the PDCCH. The PDCCH is the PDCCH indicated by the second SSB. The first SSB and the second SSB are located in the same frequency band. The first SSB is located in a position within the frequency band other than the synchronization grating, and the second SSB is located on the synchronization grating within the frequency band.

[0096] In one possible design, the third frequency domain position includes a third frequency domain offset, which is the frequency domain offset between the first SSB and the PDCCH.

[0097] Optionally, the third frequency domain offset may include at least one of the following: a frequency domain offset at the resource block (RB) granularity, or a frequency domain offset at the resource element (RE) granularity.

[0098] In one possible design, the second information is also used to indicate the subcarrier spacing of the PDCCH.

[0099] In one possible design, the second information is carried in the main information block (MIB) of the first SSB.

[0100] Optionally, the transceiver module is further configured to receive third information from the radio access network device before receiving the downlink control channel (PDCCH) from the radio access network device, wherein the third information is used to indicate that the third frequency domain position indicated by the second information is the frequency domain position of the PDCCH.

[0101] In one possible design, the PDCCH, the first SSB, and the second SSB are located in the same frequency band.

[0102] Optionally, the transceiver module may also include a sending module and a receiving module. The sending module implements the sending function of the device described in the ninth aspect, and the receiving module implements the receiving function of the device described in the ninth aspect.

[0103] Optionally, the apparatus described in the ninth aspect may further include a storage module storing a program or instructions. When the processing module executes the program or instructions, the apparatus can perform the method described in the third aspect.

[0104] It should be noted that the device described in the ninth aspect may be a terminal, a chip (system) or other component or assembly that can be disposed in the terminal, or a device that includes the terminal. This application does not limit this.

[0105] Furthermore, the technical effects of the device described in the ninth aspect can be referred to the technical effects of the method described in the third aspect, and will not be repeated here.

[0106] In a tenth aspect, a communication device is provided. The device includes a module for performing the method described in the fourth aspect.

[0107] The apparatus described in the tenth aspect may include a transceiver module. This transceiver module is configured to send a first synchronization information block (SSB) and second information to the terminal, and to send a downlink control channel (PDCCH) to the terminal. The second information indicates a third frequency domain position, the first frequency domain position is the frequency domain position of the PDCCH, the PDCCH is the PDCCH indicated by the second SSB, the first SSB and the second SSB are located in the same frequency band, the first SSB is located in a position within the frequency band other than the synchronization grating, and the second SSB is located on the synchronization grating within the frequency band.

[0108] In one possible design, the third frequency domain position includes a third frequency domain offset, which is the frequency domain offset between the first SSB and the PDCCH.

[0109] Optionally, the third frequency domain offset may include at least one of the following: a frequency domain offset at the resource block (RB) granularity, or a frequency domain offset at the resource element (RE) granularity.

[0110] In one possible design, the second information is also used to indicate the subcarrier spacing of the PDCCH.

[0111] In one possible design, the second information is carried in the main information block (MIB) of the first SSB.

[0112] Optionally, the transceiver module is further configured to send third information to the terminal before sending the downlink control channel PDCCH to the terminal. The third information is used to indicate that the third frequency domain position indicated by the second information is the frequency domain position of the PDCCH.

[0113] In one possible design, the PDCCH, the first SSB, and the second SSB are located in the same frequency band.

[0114] Optionally, the transceiver module may also include a transmitting module and a receiving module. The transmitting module implements the transmitting function of the device described in the tenth aspect, and the receiving module implements the receiving function of the device described in the tenth aspect.

[0115] Optionally, the apparatus described in the tenth aspect may further include a processing module. The processing module is used to implement the processing functions of the apparatus.

[0116] Optionally, the apparatus according to the tenth aspect may further include: a storage module storing a program or instructions. When the processing module executes the program or instructions, the apparatus can perform the method described in the fourth aspect.

[0117] It should be noted that the device described in the tenth aspect may be a network device, or a chip (system) or other component or assembly that can be disposed in a network device, or a device that includes a network device. This application does not limit the scope of the application.

[0118] Furthermore, the technical effects of the device described in the tenth aspect can be referred to the technical effects of the method described in the fourth aspect, and will not be repeated here.

[0119] Eleventhly, a communication device is provided. The device includes a module for performing the method described in the fifth aspect.

[0120] The apparatus described in the eleventh aspect may include a transceiver module, configured to receive a second synchronization information block (SSB) from a radio access network device on a first synchronization grating, and to receive a downlink control channel (PDCCH) from the radio access network device. The first synchronization grating is one of multiple synchronization gratings located in the same frequency band. The PDCCH is the PDCCH indicated by the second SSB.

[0121] In one possible design, the fourth information is used to indicate the frequency domain position of the first SSB, and the first SSB and the second SSB are located within the same frequency band. The apparatus described in the eleventh aspect may further include a processing module. The transceiver module is further configured to receive the fourth information from the radio access network device, and the processing module is configured to determine the frequency domain positional relationship between the multiple synchronization gratings and the frequency domain position of the first SSB, so as to determine, based on the frequency domain positional relationship, whether a second SSB from the radio access network device is received on each synchronization grating.

[0122] Optionally, the frequency domain positional relationship can refer to the proximity relationship between multiple synchronization gratings and their frequency domain positions.

[0123] In one possible design, the fourth information is used to indicate the frequency domain location of the first SSB, and the first SSB and the second SSB are located within the frequency band. The apparatus described in the eleventh aspect may further include a processing module. The transceiver module is further configured to receive the fourth information from the radio access network device, and the processing module is configured to determine multiple frequency domain intervals between multiple synchronization gratings and frequency domain locations, to determine whether a second SSB from the radio access network device is received on the synchronization grating corresponding to each frequency domain interval.

[0124] Optionally, the processing module is also configured to determine, according to the order of the size of the multiple frequency domain intervals, whether a second SSB from the wireless access network device is received on the synchronization grating corresponding to each frequency domain interval.

[0125] In one possible design, the fourth information may include: the frequency point ARFCN of the first SSB - the new radio NR value.

[0126] Optionally, the transceiver module may also include a sending module and a receiving module. The sending module implements the sending function of the device described in the eleventh aspect, and the receiving module implements the receiving function of the device described in the eleventh aspect.

[0127] Optionally, the apparatus described in the eleventh aspect may further include a storage module storing a program or instructions. When the processing module executes the program or instructions, the apparatus can perform the method described in the fifth aspect.

[0128] It should be noted that the device described in the eleventh aspect may be a terminal, or a chip (system) or other component or assembly that can be disposed in a terminal, or a device that includes a terminal. This application does not limit this.

[0129] Furthermore, the technical effects of the device described in the eleventh aspect can be referred to the technical effects of the method described in the fifth aspect, and will not be repeated here.

[0130] In a twelfth aspect, a communication device is provided. The device includes a module for performing the method described in the sixth aspect.

[0131] The apparatus described in the twelfth aspect may include a transceiver module, configured to transmit a second synchronization information block (SSB) to a terminal on a first synchronization grating and to transmit a downlink control channel (PDCCH) to the terminal. The first synchronization grating is one of multiple synchronization gratings located in the same frequency band. The PDCCH is the PDCCH indicated by the second SSB.

[0132] In one possible design, the fourth information is used to indicate the frequency domain location of the first SSB, which is located within the same frequency band as the second SSB. The transceiver module is also used to send the fourth information to the terminal before sending the second synchronization information block SSB to the terminal on the first synchronization grating.

[0133] In one possible design, the fourth information may include: the frequency point ARFCN of the first SSB - the new radio NR value.

[0134] Optionally, the transceiver module may also include a transmitting module and a receiving module. The transmitting module implements the transmitting function of the device described in the twelfth aspect, and the receiving module implements the receiving function of the device described in the twelfth aspect.

[0135] Optionally, the apparatus described in the twelfth aspect may further include a processing module. The processing module is used to implement the processing functions of the apparatus.

[0136] Optionally, the apparatus described in the twelfth aspect may further include a storage module storing a program or instructions. When the processing module executes the program or instructions, the apparatus can perform the method described in the sixth aspect.

[0137] It should be noted that the device described in the twelfth aspect may be a network device, or a chip (system) or other component or assembly that can be disposed in a network device, or a device that includes a network device. This application does not limit this.

[0138] Furthermore, the technical effects of the device described in the twelfth aspect can be referred to the technical effects of the method described in the sixth aspect, and will not be repeated here.

[0139] Thirteenth aspect: A communication device is provided. The device includes a processor. The processor is configured to perform the method described in any one of the first to sixth aspects.

[0140] In one possible design, the apparatus described in aspect thirteen may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver can be used for communication between the apparatus and other devices.

[0141] In one possible design, the apparatus described in aspect thirteen may further include a memory. The memory may be integrated with the processor or disposed separately. The memory may be used to store computer programs and / or data relating to the methods described in any of aspects one through six.

[0142] In this application, the device described in the thirteenth aspect may be a terminal described in the first, third, or fifth aspects, or a network device described in the second, fourth, or sixth aspects, or a chip (system) or other component or assembly disposed in the terminal or network device, or a device containing the terminal or network device.

[0143] Furthermore, the technical effects of the apparatus described in aspect thirteen can be referred to the technical effects of the method described in any one of aspects one through six, and will not be repeated here.

[0144] Fourteenth aspect: A communication device is provided. The device includes a processor and a memory. The memory stores computer instructions that, when executed by the processor, cause the device to perform the method described in any one of the first to sixth aspects.

[0145] In one possible design, the apparatus described in aspect fourteen may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver can be used for communication between the apparatus and other devices.

[0146] In this application, the device described in the fourteenth aspect may be a terminal as described in the first, third, or fifth aspects, or a network device as described in the second, fourth, or sixth aspects, or a chip (system) or other component or assembly that may be disposed in the terminal or network device, or a device that includes the terminal or network device.

[0147] Furthermore, the technical effects of the apparatus described in the fourteenth aspect can be referenced to the technical effects of the method described in any one of the first to sixth aspects, and will not be repeated here.

[0148] In a fifteenth aspect, a communication device is provided. The device includes: logic circuitry and an input / output interface. The input / output interface is used to receive code instructions and transmit them to the logic circuitry. The logic circuitry is used to execute the code instructions to perform the method described in any one of the first to sixth aspects.

[0149] In this application, the device described in the fifteenth aspect may be a terminal described in the first, third, or fifth aspects, or a network device described in the second, fourth, or sixth aspects, or a chip (system) or other component or assembly disposed in the terminal or network device, or a device containing the terminal or network device.

[0150] Furthermore, the technical effects of the device described in aspect fifteen can be referenced to the technical effects of the method described in any one of aspects one through six, and will not be repeated here.

[0151] A sixteenth aspect provides a communication device. The device includes a processor and a transceiver. The transceiver is used for information exchange between the communication device and other devices, and the processor executes program instructions to perform the method described in any one of the first to sixth aspects.

[0152] In one possible design, the apparatus described in the sixteenth aspect may further include a memory. The memory may be integrated with the processor or disposed separately. The memory may be used to store computer programs and / or data relating to the methods described in any of the first to sixth aspects.

[0153] In this application, the device described in the sixteenth aspect may be a terminal described in the first, third, or fifth aspects, or a network device described in the second, fourth, or sixth aspects, or a chip (system) or other component or assembly disposed in the terminal or network device, or a device containing the terminal or network device.

[0154] Furthermore, the technical effects of the apparatus described in the sixteenth aspect can be referenced to the technical effects of the method described in any one of the first to sixth aspects, and will not be repeated here.

[0155] Seventeenth aspect: A communication system is provided. The communication system includes a wireless access network device and a terminal. The terminal is configured to perform the methods described in the first, third, or fifth aspects. The wireless access network device is configured to perform the methods described in the second, fourth, or sixth aspects.

[0156] Eighteenth aspect: A computer-readable storage medium is provided, comprising: a computer program or instructions; when the computer program or instructions are executed on a computer, the computer causes the computer to perform the method described in any one of the first to sixth aspects.

[0157] In a nineteenth aspect, a computer program product is provided, comprising: a computer program or instructions that, when executed on a computer, cause the computer to perform the method described in any one of the first to sixth aspects. Attached Figure Description

[0158] Figure 1 This is a schematic diagram of a synchronization grating;

[0159] Figure 2 A schematic diagram of off SSB, on SSB, and type0-PDCCH;

[0160] Figure 3 This is a schematic diagram of the architecture of the communication system provided in the embodiments of this application;

[0161] Figure 4 Flowchart of the communication method provided in the embodiments of this application Figure 1 ;

[0162] Figure 5 This is a schematic diagram of the structure of the second SSB in the communication method provided in the embodiments of this application;

[0163] Figure 6 This application scenario illustrates the use of the second frequency domain offset in the communication method provided in this embodiment. Figure 1 ;

[0164] Figure 7 This application scenario illustrates the use of the second frequency domain offset in the communication method provided in this embodiment. Figure 2 ;

[0165] Figure 8 This application scenario illustrates the use of the second frequency domain offset in the communication method provided in this embodiment. Figure 3 ;

[0166] Figure 9 This application scenario illustrates the use of the second frequency domain offset in the communication method provided in this embodiment. Figure 4 ;

[0167] Figure 10 This application illustrates the application scenario of the first RE and the second RE in the communication method provided in the embodiments of this application. Figure 1 ;

[0168] Figure 11 This application illustrates the application scenario of the first RE and the second RE in the communication method provided in the embodiments of this application. Figure 2 ;

[0169] Figure 12 This application scenario illustrates the use of the second frequency domain offset in the communication method provided in this embodiment. Figure 5 ;

[0170] Figure 13 Flowchart of the communication method provided in the embodiments of this application Figure 2 ;

[0171] Figure 14 Flowchart of the communication method provided in the embodiments of this application Figure 3 ;

[0172] Figure 15 Schematic diagram of the position of the second SSB in the communication method provided in the embodiments of this application Figure 1 ;

[0173] Figure 16 Schematic diagram of the position of the second SSB in the communication method provided in the embodiments of this application Figure 2 ;

[0174] Figure 17 Schematic diagram of the communication device provided in the embodiments of this application Figure 1 ;

[0175] Figure 18 Schematic diagram of the communication device provided in the embodiments of this application Figure 2 ;

[0176] Figure 19 Schematic diagram of the communication device provided in the embodiments of this application Figure 3 ;

[0177] Figure 20 Schematic diagram of the communication device provided in the embodiments of this application Figure 4 . Detailed Implementation

[0178] The technical terms used in the embodiments of this application are described below.

[0179] 1. Frequency band

[0180] As technology evolves, the available frequency bands continue to expand. New Radio (NR) technology primarily divides frequency bands into two parts: Frequency Range 1 (FR1) and FR2. FR1 mainly refers to the bandwidth of 450 MHz to 6 GHz, while FR2 mainly refers to the bandwidth of 24.25 GHz to 52.6 GHz. In addition, the 52.6 GHz to 71 GHz band (above 52.6 GHz) has also been included in the usage scope of the next 5G mobile communication system.

[0181] A frequency band can be divided into multiple frequency bands. Each frequency band can have a fixed bandwidth, hence it can also be called a bandwidth. For example, in the FR1 unlicensed NR spectrum (NR-U), a frequency band could be 20MHz. This allows network-side communication resources to be deployed on a frequency band basis. For instance, radio access network equipment, such as base stations (BS), can centrally place related communication resources, such as SSBs and control resource sets (CORESET) #0, within the same frequency band. This means that a terminal can obtain the necessary communication resources by detecting within a single frequency band, eliminating the need for cross-band detection, thus reducing performance requirements on the terminal and accommodating terminals with different capabilities.

[0182] 2. Synchronization grating

[0183] Synchronization gratings are used to indicate a series of frequencies within a frequency band that can be used to transmit Signal Signal Blocks (SSBs). Each cell's SSB can be transmitted on the corresponding frequency of the synchronization grating, and SSBs from different cells are transmitted on different synchronization gratings. From a frequency domain perspective, the SSB overlaps the synchronization grating; therefore, it can be said that the SSB is placed on the corresponding synchronization grating. Terminals can use synchronization gratings to perform cell searches, avoiding the uncertainty of blind searches that lead to excessive access delays and energy consumption. For example, a terminal can search for the synchronization information block pattern (SS / PBCH Block / SSB) on the synchronization grating to obtain the corresponding cell's SSB, and then acquire relevant information about that cell, preparing for subsequent access to that cell.

[0184] It's understandable that a larger granularity of the synchronization grating means fewer synchronization gratings per unit frequency domain, resulting in fewer search locations required for the terminal to search for a cell, thus shortening the overall cell search time. However, the design of the synchronization grating cannot indefinitely expand its deployment granularity; it should ensure that at least one synchronization grating exists within the cell's frequency domain to transmit the cell's SSB. In other words, from the perspective of terminal cell search, a larger synchronization grating granularity is better under certain conditions, as it speeds up the cell search process; from a network deployment perspective, a smaller synchronization grating granularity is better, as it allows for more flexible network deployment. For example, Figure 1 As shown, in FR1's NR-U, each frequency band can have a corresponding synchronization grating, located near the lower edge of the band. The advantage of this design is that most of the frequency domain space within the band is reserved, resulting in more available frequency domain resources and the ability to carry more services, such as a type 0 physical downlink control channel (PDCCH) carrying CORESET#0, and / or a physical downlink shared channel (PDSCH) carrying system information block 1 (SIB1). For the terminal, only one cell search is needed within each frequency band—that is, detecting a synchronization grating within that band—to obtain the corresponding SSB, significantly reducing terminal power consumption.

[0185] 3. SSB

[0186] SSB can be used to implement some or all of the functions such as measurement, ANR determination, CGI reporting, initial cell access, cell handover, and cell reselection. For ease of description, ANR determination, CGI reporting, initial cell access, cell handover, and cell reselection are collectively referred to as non-measurement functions. If the SSB is used for non-measurement (hereinafter referred to as a non-measurement SSB or on SSB), the master information block (MIB) of the non-measurement SSB may include the configuration information of the cell's type0-PDCCH and CORESET#0. The CORESET#0 can be carried on the type0-PDCCH, and the configuration information can indicate the frequency domain location of the type0-PDCCH. Based on this configuration information, the terminal can receive the type0-PDCCH and thus complete the aforementioned non-measurement functions according to the CORESET#0. If the SSB is used for measurement (hereinafter referred to as a measurement SSB or off SSB), the MIB of the measurement SSB does not include the configuration information of the cell's type0-PDCCH and CORESET#0, but only includes the configuration information used for measurement.

[0187] As described above regarding synchronization gratings, both the measured SSB and the non-measured SSB can be placed on their respective synchronization gratings. However, in some scenarios, such as... Figure 2 As shown, in a secondary cell (Scell) within a carrier aggregation scenario, measurement SSBs and non-measurement SSBs can be configured within the same frequency band. The measurement SSB can be placed outside the synchronization raster within the frequency band, i.e., placed in a frequency domain location other than the synchronization raster, also known as an off-sync raster SSB, or simply off SSB. The non-measurement SSB can be placed on the synchronization raster, also known as an on-sync raster SSB, or simply on SSB. In this case, there can be two frequency domain offsets between off SSB, on SSB, and type0-PDCCH, namely the first frequency domain offset (1... st offset) and second frequency domain offset (2 ndThe first frequency domain offset indicates the frequency domain offset between on SSB and type0-PDCCH. For example, the frequency domain offset between the lowest indexed resource block (RB) in on SSB (i.e., the RB whose frequency domain position is closest to the lower frequency band) and the lowest indexed RB in type0-PDCCH. The second frequency domain offset indicates the frequency domain offset between off SSB and on SSB. The terminal can receive Measurement Target New Radio (MeasObjectNR) parameters from the radio access network device, which can indicate the frequency domain position of off SSB. The terminal can determine the second frequency domain offset based on the frequency domain position of off SSB and the frequency domain position of the synchronization grating within that frequency band, or the second frequency domain offset can be pre-configured by the radio access network device. Thus, the terminal can receive off SSB or on SSB from the radio access network device, with the first frequency domain offset carried in the off SSB or on SSB, such as in the MIB of off SSB or on SSB. If, after completing measurements using the off-SSB, the terminal wants to perform non-measurement functions of the secondary cell, such as accessing the secondary cell, reselecting to the secondary cell, or handing over to the secondary cell, and there is only one synchronization grating in that frequency band, the terminal can determine the frequency domain position of the type0-PDCCH based on the frequency domain position of the off-SSB, the first frequency domain offset, and the second frequency domain offset. This allows the terminal to receive the type0-PDCCH, obtain CORESET#0, and thus complete the non-measurement functions of the secondary cell. It should be understood that if the first frequency domain offset is not carried in the off-SSB, the radio access network device needs to send an on-SSB to the terminal so that the terminal can determine the frequency domain position of the type0-PDCCH based on the first frequency domain offset in the on-SSB. However, if the first frequency domain offset is carried in the off-SSB, the terminal can determine the frequency domain position of the type0-PDCCH based on the first frequency domain offset in the off-SSB, and the radio access network device does not need to send an on-SSB to the terminal. In other words, depending on the situation, on SSB can be an existing SSB, that is, the radio access network device sends on SSB to the terminal, or it can be a non-existent SSB, that is, the radio access network device does not send on SSB to the terminal. Therefore, on SSB is also called hypothetical on syncraster SSB.Furthermore, on SSB, off SSB, and type0-PDCCH can satisfy quasi-colocation (QCL relationship), meaning that the terminal can use the same beam to receive on SSB, off SSB, and type0-PDCCH, or they may not satisfy the QCL relationship. For example, only two of them may satisfy the QCL relationship, or none of the three may satisfy the QCL relationship. This application does not limit this.

[0188] It should be understood that the above introduction mainly addresses the case of a single synchronization grating within a frequency band. When multiple synchronization gratings exist within a frequency band, such as the above 52.6GHz band, a single band within this band is typically quite wide, such as 100MHz or 400MHz, allowing for multiple synchronization gratings to be placed simultaneously. This enables the secondary cell's on-SSB to be arbitrarily positioned on multiple synchronization gratings. In this situation, there is currently no solution for how the terminal determines the on-SSB frequency domain position and how it determines the second frequency domain offset. This undoubtedly introduces uncertainty into the terminal's reception of the type 0-PDCCH, causing the terminal to fail to receive it in a timely manner, or even to fail to receive the type 0-PDCCH at all, thus preventing the completion of the secondary cell's non-measurement functions.

[0189] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0190] The technical solutions of this application embodiment can be applied to various communication systems, such as wireless fidelity (WiFi) systems, vehicle-to-everything (V2X) communication systems, device-to-device (D2D) communication systems, vehicle-to-everything (V2X) communication systems, 4th generation (4G) mobile communication systems, such as long term evolution (LTE) systems, worldwide interoperability for microwave access (WiMAX) communication systems, 5th generation (5G) mobile communication systems, such as new radio (NR) systems, and future communication systems, such as 6th generation (6G) mobile communication systems, etc.

[0191] This application will present various aspects, embodiments, or features relating to systems that may include multiple devices, components, modules, etc. It should be understood and appreciated that individual systems may include additional devices, components, modules, etc., and / or may not include all the devices, components, modules, etc. discussed in conjunction with the accompanying drawings. Furthermore, combinations of these approaches are also possible.

[0192] Furthermore, in the embodiments of this application, words such as "exemplarily" and "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as an "example" in this application should not be construed as being better or more advantageous than other embodiments or designs. Rather, the use of the term "example" is intended to present the concept in a specific manner.

[0193] In the embodiments of this application, the terms "information," "signal," "message," "channel," and "singaling" may sometimes be used interchangeably. It should be noted that, without emphasizing their distinction, they all convey the same meaning. Similarly, the terms "of," "corresponding (relevant)," and "corresponding" may sometimes be used interchangeably. It should be noted that, without emphasizing their distinction, they all convey the same meaning.

[0194] The network architecture and business scenarios described in the embodiments of this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0195] To facilitate understanding of the embodiments of this application, let's first take... Figure 3 The communication system illustrated herein is used as an example to illustrate a communication system applicable to embodiments of this application. For example, Figure 3 This is a schematic diagram of the architecture of a communication system to which the communication method provided in the embodiments of this application is applicable.

[0196] like Figure 3 As shown, the communication system includes: network devices, such as wireless access network devices, or terminals.

[0197] The aforementioned network device is a device located on the network side of the aforementioned communication system and having wireless transceiver functionality, or a chip or chip system that can be installed in the device. This network equipment includes, but is not limited to: access points (APs) in wireless fidelity (WiFi) systems, such as home gateways, routers, servers, switches, and bridges; evolved Node Bs (eNBs), radio network controllers (RNCs), Node Bs (NBs), base station controllers (BSCs), base transceiver stations (BTSs), home base stations (e.g., home evolved Node Bs or home Node Bs, HNBs), baseband units (BBUs), wireless relay nodes, wireless backhaul nodes, and transmission and reception points (TRPs or TPs). It can also be 5G, such as gNBs in new radio (NR) systems, or transmission points (TRPs or TPs), one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or network nodes constituting gNBs or transmission points, such as baseband units (BBUs) or distributed units (DMUs). Units such as DU (Dedicated Unit) and roadside units (RSU) with base station functions.

[0198] The aforementioned terminal is a terminal that accesses the aforementioned communication system and has wireless transceiver capabilities, or a chip or chip system that can be installed in the terminal. This terminal can also be referred to as a user device, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user equipment. In the embodiments of this application, the terminal can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, handset, laptop computer, machine-type communication (MTC), virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical care, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, vehicle-mounted terminal, RSU with terminal functionality, etc. The terminal device of this application may also be an on-board module, on-board unit, on-board component, on-board chip or on-board unit that is built into a vehicle as one or more components or units.

[0199] It should be noted that the communication method provided in the embodiments of this application can be applied to... Figure 3 For any two nodes shown, such as between a terminal and a wireless access network device, the specific implementation can be referred to the following method embodiments, which will not be repeated here.

[0200] It should be noted that the solutions in the embodiments of this application can also be applied to other communication systems, and the corresponding names can be replaced by the names of the corresponding functions in other communication systems.

[0201] It should be understood that Figure 3 This is a simplified diagram for ease of understanding only. The communication system may also include other network devices and / or other terminals. Figure 3 It was not drawn in the middle.

[0202] The following will combine Figures 4-16 The communication method provided in the embodiments of this application will be described in detail.

[0203] For example, Figure 4 Flowchart of the communication method provided in the embodiments of this application Figure 1 This communication method can be applied to Figure 3 Communication between any two nodes, such as between a terminal and a wireless access network device. Figure 4 As shown, the communication method includes the following steps:

[0204] S401, the radio access network device sends the first information of the first SSB to the terminal. Correspondingly, the terminal receives the first information of the first SSB from the radio access network device.

[0205] The first SSB is primarily used for measurement and can be the SSB of a specific cell (where the terminal is located), such as the primary cell (Pcell) or secondary cell. It is situated outside the synchronization grating within the frequency band, i.e., off the SSB. This frequency band can be any band within a frequency range, such as any band in the above 52.6GHz band mentioned above, or it can be a low-frequency band, such as any band in FR1 or FR2 mentioned above. The bandwidth of this frequency band can be 100MHz, 400MHz, 800MHz, etc., but is not limited, and can also be smaller, such as 20MHz, 40MHz, 80MHz, etc. Multiple synchronization gratings can be present within this frequency band, such as 2, 3, 4, etc., without limitation. Therefore, the first SSB being located outside the synchronization grating within the frequency band can mean that the first SSB is not located on any synchronization grating within the frequency band.

[0206] The first information is used to indicate the first frequency domain location, which is the frequency domain location of the second SSB. The second SSB is mainly used for non-measurement purposes and can be the SSB of the aforementioned cell. That is, the cell can have one or more SSBs, such as the first SSB and the second SSB. The first SSB and the second SSB are located in the same frequency band, and the second SSB is located on a synchronization grating within that frequency band, i.e., on SSB, or the second SSB can also be located on multiple synchronization gratings within that frequency band simultaneously, without limitation. For ease of understanding, the following description uses the example of the second SSB being located on a synchronization grating within that frequency band.

[0207] S402, the radio access network device sends a PDCCH to the terminal. Correspondingly, the terminal receives the PDCCH from the radio access network device based on the first information.

[0208] The aforementioned PDCCH is the PDCCH indicated by the second SSB, which can be the aforementioned type0-PDCCH, carrying the CORESET#0 of the aforementioned cell. This CORESET#0 is used by the terminal to complete the non-measurement functions of the cell based on this CORESET#0.

[0209] Among them, the terminal can, based on the first information mentioned above, namely the frequency domain position of the second SSB, and the first frequency domain offset (1 st The first frequency domain offset is used to determine the second frequency domain position of the PDCCH, so as to receive the PDCCH from the radio access network device at the second frequency domain position. This first frequency domain offset can be the frequency domain offset between the second SSB and the PDCCH. This first frequency domain offset can be carried in the first SSB, such as in the MIB of the first SSB, or in the second SSB, such as in the MIB of the second SSB. That is, if the first frequency domain offset is not carried in the first SSB, the radio access network device can send the second SSB carrying the first frequency domain offset to the terminal. However, if the first frequency domain offset is carried in the first SSB, the radio access network device can choose not to send the second SSB to the terminal, thereby effectively reducing communication overhead and improving communication efficiency. Optionally, the PDCCH, the first SSB, and the second SSB can be located in the same frequency band, so that the terminal does not need to receive the PDCCH across frequency bands, thereby reducing the requirements on the terminal's receiving performance and accommodating terminals with different capabilities. Furthermore, the specific implementation principle of the first frequency domain offset can be referred to the relevant introduction of the second frequency domain offset below, and will not be repeated here.

[0210] In S401 above, the first information may include at least one of the following: the absolute frequency domain position of the second SSB, the relative frequency domain position of the second SSB, or frequency domain position indication information of the second SSB. In other words, the first information can indicate the first frequency domain position, i.e., the frequency domain position of the second SSB, through at least one of the absolute frequency domain position, relative frequency domain position, and frequency domain position indication information of the second SSB, which will be described separately below.

[0211] The absolute frequency domain location of the second SSB can include: frequency point / absolute radiofrequency channel number (ARFCN) - NR value. Each ARFCN-NR value corresponds to a specific frequency domain location, such as a specific frequency point. For example, an ARFCN-NR value of 2562499 corresponds to a frequency of 57 GHz. Therefore, the ARFCN-NR value of the second SSB directly indicates its frequency point, i.e., it indicates the frequency domain location of the second SSB, and is thus considered its absolute frequency domain location. Figure 5As shown, the frequency of the second SSB can be located at the center of the second SSB, representing its center frequency, or at either end of the second SSB, such as the top (i.e., the highest frequency within the frequency domain occupied by the second SSB) or the bottom (i.e., the lowest frequency within the frequency domain occupied by the second SSB). There is no limitation on this. It should be understood that the ARFCN-NR value is unique in the frequency domain. The ARFCN-NR value can accurately indicate the frequency domain position of the second SSB to avoid errors.

[0212] The relative frequency domain position of the aforementioned second SSB may include: the second frequency domain offset (2 nd The second frequency domain offset can be the frequency domain offset between the first SSB and the second SSB.

[0213] Method 1: The second frequency domain offset is the frequency domain offset between a specific RB in the first SSB (e.g., the first RB) and a corresponding RB in the second SSB (e.g., the second RB). Specifically, this offset could be the frequency domain offset between the center of the first RB and the center of the second RB, the frequency domain offset between the top of the first RB and the top of the second RB, or the frequency domain offset between the bottom of the first RB and the bottom of the second RB. Here, the first RB is the RB with the lowest index in the first SSB, and the second RB is the RB with the lowest index in the second SSB. For example... Figure 6 As shown in (a), the first RB is RB. N-1 The second RB is RB M-1 M and N are positive integers, but not limited. The first RB can also be the RB with the highest index in the first SSB, and the second RB can also be the RB with the highest index in the second SSB, for example... Figure 6 As shown in (b), the first RB is RB0 among N RBs, and the second RB is RB0 among M RBs. Alternatively, the first RB can also be the RB with the middle index in the first SSB, and the second RB can also be the RB with the middle index in the second SSB, for example... Figure 6 As shown in (c), if N is even, then the first RB is RB. N / 2-1 Or RB N / 2+1 If M is even, then the second RB is RB. M / 2-1 Or RB M / 2+1 Or, for example Figure 6 As shown in (d), if N is odd, then the first RB is RB. (N+1) / 2 If M is odd, then the second RB is RB. (M+1) / 2 .

[0214] Method 2: The second frequency domain offset is the frequency domain offset between a specific RE in the first SSB (e.g., a specific RE in the first RB, such as the first RE) and a corresponding RE in the second SSB (e.g., the corresponding RE in the second RB, such as the second RE). Specifically, it can be the frequency domain offset between the center of the first RE and the center of the second RE, or it can be the frequency domain offset between the two ends of the first RE and the two ends of the second RE, such as the frequency domain offset between the top of the first RE and the top of the second RE, or the frequency domain offset between the bottom of the first RE and the bottom of the second RE. Here, the first RE is the RE with the lowest index in the first RB, and the second RE is the RB with the lowest index in the second RB, for example... Figure 7 As shown in (a), the first RE is RE S-1 The second RE is RE T-1 S and T are positive integers, but not limited to them. The first RE can also be the RB with the highest index in the first RB, and the second RE can also be the RE with the highest index in the second RB, for example... Figure 7 As shown in (b), the first RE is RE0 among S REs, and the second RE is RE0 among T REs. Alternatively, the first RE can also be the RB with the middle index in the first RB, and the second RE can also be the RE with the middle index in the second RB, for example... Figure 7 As shown in (c), if S is even, then the first RE is RE. S / 2-1 Or RE S / 2+1 If T is even, then the second RE is RE. T / 2-1 Or RE T / 2+1 Or, for example Figure 7 As shown in (d), if S is odd, then the first RE is RE. (S+1) / 2 If T is odd, then the second RE is RE. (T+1) / 2 .

[0215] Method 3, for example Figure 8 As shown, the second frequency domain offset is the frequency domain offset between the frequency points of the first SSB and the second SSB. The frequency point of the first SSB can be located at the center of the first SSB, representing its center frequency, or at either end of the first SSB, such as the top (i.e., the highest frequency within the frequency domain occupied by the first SSB) or the bottom (i.e., the lowest frequency within the frequency domain occupied by the first SSB). There is no limitation on this. The specific implementation of the frequency point of the second SSB can be found in the relevant description of the absolute frequency domain position of the second SSB above, and will not be repeated here.

[0216] It is understood that the above-described methods 1-3 make the definition of the second frequency domain offset in this application clearer. For ease of understanding, the second frequency domain offset referred to below adopts the definition in method 1.

[0217] Since RB and RE are frequency domain resources of different granularities, the frequency domain offset between the first SSB and the second SSB can be at the RB granularity, the RE granularity, or a combination of RB and RE granularities. In other words, the second frequency domain offset can include at least one of the following: an RB-granularity frequency domain offset or an RE-granularity frequency domain offset, making the second frequency domain offset more accurate. Specifically, if the frequency domain offset between the first SSB and the second SSB is an integer multiple of RB, then the second frequency domain offset can be an RB-granularity frequency domain offset, i.e., how many RBs differ between the first SSB and the second SSB. Figure 9 As shown in (a), the first SSB differs from the second SSB by 2 RBs, and the second frequency domain offset is 2 RBs. Since one RB includes multiple REs, such as 12 REs, the frequency domain offset at the RB granularity can also be represented by the frequency domain offset at the RE granularity, for example... Figure 9 As shown in (a), the first SSB and the second SSB can be considered to differ by 24 REs, and the second frequency domain offset is 24 REs. If the frequency domain offset between the first SSB and the second SSB is a non-integer multiple of RBs, then the second frequency domain offset can be a frequency domain offset at the RE granularity, that is, how many REs the first SSB and the second SSB differ from each other, for example... Figure 9 As shown in (b), the first SSB differs from the second SSB by 8 REs, and the second frequency domain offset is 8 REs. Alternatively, the second frequency domain offset can also be a frequency domain offset with RB+RE granularity, for example... Figure 9 As shown in (c), the first SSB and the second SSB differ by 2 RB + 8 RE, and the second frequency domain offset is 2 RB + 8 RE.

[0218] Regarding the frequency domain offsets at the RB and RE granularities mentioned above, the first information may further include multiple fields to indicate the frequency domain offsets at the RB and RE granularities. For example, the first information may include a first field and a second field, where the first field indicates the frequency domain offset at the RB granularity and the second field indicates the frequency domain offset at the RE granularity. However, the inclusion of multiple fields in the first information is merely an example and not a limitation. For instance, the first information may also include only one field, where a portion of the bits in the field indicates the frequency domain offset at the RB granularity and another portion indicates the frequency domain offset at the RE granularity.

[0219] The first field can include multiple bits, such as 3, 4, or 5 bits, used to indicate the frequency domain offset at the RB granularity through combinations of 0 or 1 for each bit. For example, taking a first field consisting of 3 bits, the frequency domain offset at the RB granularity indicated by the first field can be as shown in Table 1 below.

[0220] Table 1

[0221] First field RB-level frequency domain offset 000 0 RB 001 1 RB 010 2 RB 011 3 RB 100 4 RB 101 5 RB 110 6 RB 111 7 RB

[0222] As can be seen, if the first field includes 3 bits, it can indicate a frequency domain offset of up to 7 RBs. In practice, more or fewer bits can be selected based on the frequency domain offset at the RB granularity. For example, if the second frequency domain offset is typically greater than 7 RBs, the first field can include more bits, such as 4, 5, or 6 bits. Conversely, if the second frequency domain offset is typically less than 7 RBs, the first field can still include 3 bits, or even fewer, such as 1 or 2 bits. Furthermore, the above indication method for the first field is merely an example and not a limitation. For instance, the first field can also indicate the frequency domain offset at the RB granularity by corresponding bit counts. For example, if the first field includes 3 bits, it indicates a frequency domain offset of 3 RBs; if the first field includes 4 bits, it indicates a frequency domain offset of 4 RBs, and so on. For the terminal, which is configured with Table 1 or similar entries, after receiving the first information, the terminal can determine the frequency domain offset at the RB granularity by traversing the corresponding entries based on the first field.

[0223] The second field can include multiple bits, such as 3, 4, or 5 bits, used to indicate the frequency domain offset at the RE granularity through combinations of 0 or 1 for each bit. For example, taking a second field consisting of 4 bits, the frequency domain offset at the RE granularity indicated by the second field can be as shown in Table 2 below.

[0224] Table 2

[0225] Second field Frequency domain offset at RE granularity 0000 0 REs 0001 1 RE 0010 2 REs 0011 3 REs 0100 4 REs 0101 5 REs 0110 6 REs 0111 7 REs 1000 8 REs 1001 9 REs 1010 10 REs 1011 11 REs 1100 12 REs 1101 13 REs 1110 14 REs 1111 15 REs

[0226] As can be seen, if the second field includes 4 bits, it can indicate a frequency domain offset of up to 15 REs. In practice, the number of bits can be chosen based on the size of the RE-level frequency domain offset. For example, if the second frequency domain offset is typically greater than 15 REs, the second field can include more bits, such as 5, 6, or 7 bits. Conversely, if the second frequency domain offset is typically less than 15 RBs, the first field can still include 4 bits, or even fewer, such as 2 or 3 bits. It is worth noting that if the aforementioned second frequency domain offset is an RB+RE granularity frequency domain offset, then the RE-level frequency domain offset can be 0-11 REs. That is, the RE-level frequency domain offset is mainly used to indicate frequency domain offsets where RBs cannot be rounded down. In this case, the second field can include only 4 bits, thereby reducing the length of the second field, saving overhead, and improving communication efficiency. Furthermore, the above-described indication method for the second field is merely an example and not intended to be limiting. For instance, the second field can also indicate the frequency domain offset at the RE granularity by corresponding to the number of bits. For example, if the second field includes 6 bits, it indicates the frequency domain offset for 6 REs; if the second field includes 8 bits, it indicates the frequency domain offset for 8 REs, and so on. For the terminal, which is configured with Table 2 or similar entries, after receiving the first information, the terminal can determine the frequency domain offset at the RE granularity by traversing the corresponding entries based on the second field.

[0227] It should be noted that if the second frequency domain offset only has frequency domain offsets at the RB granularity and no frequency domain offsets at the RE granularity (i.e., the frequency domain offset at the RE granularity is 0 REs), then the first information can also include only the first field. Similarly, if the second frequency domain offset only has frequency domain offsets at the RE granularity and no frequency domain offsets at the RB granularity (i.e., the frequency domain offset at the RB granularity is 0 RBs), then the first information can also include only the second field.

[0228] Typically, the subcarrier spacing (SCS) of the first SSB and the second SSB are the same, meaning the RE bandwidth is the same. The terminal can determine the bandwidth corresponding to the second frequency domain offset based on the second frequency domain offset and the subcarrier spacing. For example, Figure 9 As shown in (a), if the subcarrier spacing is 60 kilohertz (kHz), then the bandwidth corresponding to the second frequency domain offset is: 60 kHz * 24 = 60 kHz * 12 * 2 = 1440 kHz. For example, Figure 9 As shown in (b), if the subcarrier spacing is 120kHz, then the bandwidth corresponding to the second frequency domain offset is: 120kHz * 8 = 960kHz. For example, Figure 9As shown in (c), if the subcarrier spacing is 240kHz, then the bandwidth corresponding to the second frequency domain offset is: 240kHz*12*2+240kHz*8=7680kHz. Thus, the terminal can determine the frequency domain position of the second SSB, such as the frequency point of the second SSB, or its absolute frequency domain position, based on the bandwidth corresponding to the second frequency domain offset.

[0229] The frequency domain location indication information of the aforementioned second SSB may include at least one of the following: the global synchronization channel number (GSCN) of the synchronization grating, or the frequency domain location index of the synchronization grating.

[0230] The GSCN of the sync grating indicates its location in a specific frequency domain, such as a specific frequency point. For example, if the GSCN of the sync grating is 24666, and the parameter N = 2410 is used to calculate the frequency point indicated by the GSCN, then the indicated frequency point is 65.89488 GHz. If the second SSB is located on the sync grating, then the frequency domain location indicated by the sync grating's GSCN can be considered the frequency domain location of the second SSB. In other words, the frequency domain location of the second SSB can be indirectly indicated through the sync grating's GSCN, i.e., the specific frequency point at which the second SSB is located.

[0231] The frequency domain position index of the sync grating is used to indicate which sync grating within the frequency band the second SSB is located on. For example, the frequency domain position index of the sync grating can include multiple bits, such as 2, 3, 4, or 5 bits, etc., used to indicate which sync grating within the frequency band the second SSB is located on through combinations of 0 or 1 bits. For example, taking a sync grating frequency domain position index including 3 bits as an example, the indication of the sync grating frequency domain position index can be as shown in Table 3 below.

[0232] Table 3

[0233] Frequency domain position index of the synchronization grating Synchronous grating 000 Synchronization Grating 1 001 Second synchronization grating 010 Third synchronization grating 011 4th Synchronization Grating 100 5th Synchronization Grating 101 Synchronization Grating No. 6 110 7th Synchronization Grating 111 8th Synchronization Grating

[0234] As can be seen, if there are 8 synchronization gratings in the frequency band, the frequency domain position index of the synchronization grating includes 3 bits to indicate which synchronization grating the second SSB is located on within the frequency band. For example, if the terminal is configured with Table 3 above, or similar entries, and the frequency domain position index of the synchronization grating is 010, the terminal traverses the corresponding entries to determine that the second SSB is on the 3rd synchronization grating. Of course, in practice, more or fewer bits can be selected depending on the number of synchronization gratings in the frequency band. For example, if the number of synchronization gratings in the frequency band is usually greater than 8, the frequency domain position index of the synchronization grating can include more bits, such as 4, 5, 6 bits, etc. Conversely, if the number of synchronization gratings in the frequency band is usually less than 8, the frequency domain position index of the synchronization grating can still include 3 bits, or fewer bits, such as 1, 2 bits, etc. Furthermore, the above-described indication method of the frequency domain position index of the synchro is merely an example and is not intended to be limiting. For instance, the frequency domain position index of the synchro can also indicate which synchro grating the second SSB is located on by the number of bits. For example, if the frequency domain position index of the synchro includes 3 bits, it indicates that the second SSB is located on the 3rd synchro grating in the frequency band; if the frequency domain position index of the synchro includes 5 bits, it indicates that the second SSB is located on the 5th synchro grating in the frequency band, and so on.

[0235] There are several ways to carry the first information. For example, it can be carried in the first SSB, such as in the MIB of the first SSB, or it can be carried in related information of the first SSB, such as in the measurement target new radio parameters of the first SSB. If the first information is carried in the MIB of the first SSB, then the first information and the first SSB are sent together. For example, the radio access network device sends the first SSB carrying the MIB to the terminal. If the first information is carried in the target new radio parameters, then the first information and the first SSB are sent separately. For example, the radio access network device sends the target new radio parameters to the terminal first, and then sends the first SSB to the terminal. It can be understood that whether the first SSB and the first information are sent together or separately, they are sent before the radio access network device sends the PDCCH. In this way, the terminal knows the frequency domain position of the PDCCH before the radio access network device sends the PDCCH, ensuring that the terminal can successfully receive the PDCCH when the radio access network device sends it, without the radio access network device retransmitting the PDCCH, thereby further reducing communication latency and improving communication efficiency.

[0236] It should be noted that the way the first information is carried differs, and the above-mentioned indication content of the first information also differs, which will be introduced in detail below.

[0237] 1) The first information is carried in the new air interface parameters of the measurement target. The first information includes: the ARFCN-NR value of the second SSB or the GSCN of the synchronization grating. The specific implementation of the new air interface parameters of the measurement target can be shown in Table 4 below.

[0238] Table 4

[0239] Variable name variable ssbFrequency ARFCN-ValueNR ssbSubcarrierSpacing SubcarrierSpacing ssbFreuqency2 ARFCN-ValueNR / GSCN …… ……

[0240] Among them, ssbFrequency2 refers to the first information mentioned above, including the ARFCN-NR value of the second SSB or the GSCN of the synchronization grating. ssbFrequency indicates the absolute frequency domain position of the first SSB, including its ARFCN-NR value. ssbSubcarrierSpacing indicates the subcarrier spacing of the SSB, i.e., the subcarrier spacing between the first and second SSBs, which may include 60kHz, 120kHz, 240kHz, 480kHz, etc. It should be understood that Table 4 only shows the main contents of the new air interface parameters of the measurement target; other contents may also be included, and this is not limited. It is understandable that if the first information is carried in the new air interface parameters of the measurement target, then the first information includes the ARFCN-NR value of the second SSB or the GSCN of the synchronization grating. This minimizes the changes to the current new air interface parameters of the measurement target and has the best protocol support. That is, it can be achieved by adding ssbFreuqrncy2, which is similar to ssbFreuqrncy, to the ARFCN-NR value of the first SSB indicated by ssbFreuqrncy.

[0241] 2) The first information is carried in the MIB of the first SSB. The first information includes: the second frequency domain offset or the frequency domain position index of the above-mentioned synchronization grating. Thus, the specific implementation of the MIB of the first SSB can be shown in Table 5 below.

[0242] Table 5

[0243]

[0244]

[0245] The `systemFrameNumber` indicates the temporal location of the second SSB, such as which system frame (SIZE) the second SSB is located in. `ssb-SubcarrierOffset` and `pdcch-ConfigSIB1` may include the first and second fields to indicate the aforementioned second frequency domain offset, or the frequency domain position index of the aforementioned synchronization grating. For example, `ssb-SubcarrierOffset` indicates the frequency domain offset at the RB granularity in the second frequency domain offset, i.e., `INTEGER` includes the first field; `pdcch-ConfigSIB1` indicates the frequency domain offset at the RE granularity in the second frequency domain offset, i.e., `PDCCH-ConfigSIB1` includes the second field. As another example, `ssb-SubcarrierOffset` indicates the frequency domain offset at the RE granularity in the second frequency domain offset, i.e., `INTEGER` includes the second field; `pdcch-ConfigSIB1` indicates the frequency domain offset at the RB granularity in the second frequency domain offset, i.e., `PDCCH-ConfigSIB1` includes the first field. For example, `ssb-SubcarrierOffset` or `pdcch-ConfigSIB1` is used to indicate the frequency domain location index of the synchronization grating; that is, `INTEGER` or `pdcch-ConfigSIB1` includes this frequency domain location index. It should be noted that in this case, the first field, the second field, or the frequency domain location index can be existing fields in the MIB or newly added fields; there is no limitation on this. `cellBarred` is used to indicate whether the cell corresponding to the second SSB supports initial cell access, including whether it supports initial cell access (barred) or does not support initial cell access (notBarred). `intraFreqReselection` is used to indicate whether the cell corresponding to the second SSB supports intra-frequency reselection, including whether it supports intra-frequency reselection (allowed) or does not support intra-frequency reselection (notAllowed). However, if the first information occupies a large number of bits, `cellBarred` may not include "not supporting initial cell access," and `intraFreqReselection` may not include "supporting intra-frequency reselection," in order to provide more available bits for the first information. It should be understood that Table 5 only shows the main contents of the MIB of the first SSB. The MIB of the first SSB may also include other contents, which is not limited.

[0246] It should be understood that, since the aforementioned first frequency domain offset, i.e., the frequency domain offset between the second SSB and the PDCCH, can be carried in the MIB of the first SSB, that is, the aforementioned ssb-SubcarrierOffset and pdcch-ConfigSIB1 are used to indicate the first frequency domain offset. For example, ssb-SubcarrierOffset is used to indicate the frequency domain offset at the RB granularity in the first frequency domain offset, and pdcch-ConfigSIB1 is used to indicate the frequency domain offset at the RE granularity in the first frequency domain offset; or, ssb-SubcarrierOffset is used to indicate the frequency domain offset at the RE granularity in the first frequency domain offset, and pdcch-ConfigSIB1 is used to indicate the frequency domain offset at the RB granularity in the first frequency domain offset. The specific implementation principle of the frequency domain offset at the RB granularity and the frequency domain offset at the RE granularity can be referred to the relevant introduction of the second frequency domain offset mentioned above, and will not be repeated here. At this point, if the second frequency domain offset, or the frequency domain position index of the synchronization grating, is also carried in the MIB of the first SSB, the radio access network device can carry a new MIB identifier, such as MIB2, in the measurement target new air interface parameters of the first SSB. This allows the terminal to determine, based on the MIB identifier, that the information in the MIB of the first SSB is either the second frequency domain offset / frequency domain position index of the synchronization grating, or the second frequency domain offset / frequency domain position index of the synchronization grating + the first frequency domain offset. Thus, the terminal can determine the total frequency domain offset, i.e., the frequency domain offset between the first SSB and the aforementioned PDCCH, based on the second frequency domain offset / frequency domain position index of the synchronization grating and the first frequency domain offset. Based on this total frequency domain offset, the terminal can then determine the second frequency domain position of the PDCCH and receive the PDCCH at that second frequency domain position.

[0247] It should be noted that if the first information is carried in the MIB of the first SSB, then the first information includes the aforementioned second frequency domain offset or the frequency domain position index of the aforementioned synchronization grating. This requires minimal modification to the current MIB and has optimal protocol support. That is, based on the aforementioned ssb-SubcarrierOffset and pdcch-ConfigSIB1 indicating the aforementioned first frequency domain offset, a similar second frequency domain offset or the aforementioned frequency domain position index of the synchronization grating can be added to achieve this.

[0248] Optionally, in the first application scenario of the above embodiments, the first information can also be used to indicate the subcarrier spacing of the second SSB. In this case, the subcarrier spacing of the first SSB and the second SSB can be different; for example, the subcarrier spacing of the first SSB can be smaller than the subcarrier spacing of the second SSB, that is, the bandwidth of the first RE is smaller than the bandwidth of the second RE.

[0249] In one implementation, if the first information is carried in the new air interface parameters of the measurement target, the new air interface parameters of the measurement target may further include: the subcarrier spacing of the second SSB. For example, the specific implementation of the new air interface parameters of the measurement target can be shown in Table 6 below.

[0250] Table 6

[0251] Variable name variable ssbFrequency ARFCN-ValueNR ssbSubcarrierSpacing SubcarrierSpacing ssbSubcarrierSpacing2 SubcarrierSpacing2 ssbFreuqency2 ARFCN-ValueNR / GSCN …… ……

[0252] Unlike Table 4 above, Table 6 uses `ssbSubcarrierSpacing` to indicate the subcarrier spacing of the first SSB, including 60kHz, 120kHz, 240kHz, 480kHz, etc. `ssbSubcarrierSpacing2` indicates the subcarrier spacing of the second SSB, including 120kHz, 480kHz, 960kHz, etc. Of course, Table 6 only shows the main contents of the new air interface parameters of the measurement target; other contents may also be included, and this is not limited.

[0253] In another implementation, if the first information is carried in the MIB of the first SSB, the MIB of the first SSB may also include the subcarrier spacing of the second SSB. Optionally, it may also include the subcarrier spacing of the PDCCH mentioned above. For example, the specific implementation of the MIB of the first SSB can be shown in Table 7 below.

[0254] Table 7

[0255]

[0256] Unlike Table 5 above, Table 7 uses "subCarrierSpacingCommon" to indicate the subcarrier spacing of the second SSB, including 120kHz, 480kHz, 960kHz, etc. Optionally, it also indicates the subcarrier spacing of the PDCCH, including 15kHz, 60kHz, 120kHz, etc. Of course, Table 7 only shows the main contents of the MIB of the first SSB; the MIB of the first SSB may also include other contents, which is not limited.

[0257] It is worth noting that if the first information indicates the second frequency domain offset, then if the subcarrier spacing of the first SSB is less than the subcarrier spacing of the second SSB, that is, the bandwidth of the RE in the first SSB is less than the bandwidth of the RE in the second SSB, the second frequency domain offset may not be aligned at the RE granularity. That is, the second frequency domain offset is an integer multiple of the RE in the first SSB, but not an integer multiple of the RE in the second SSB.

[0258] For example, taking the first RE and the second RE as examples, the bandwidth of the first RE is 60KHz, and the bandwidth of the second RE is 120KHz. Figure 10 As shown in (a), if the bottom end of the first RE is located at the center of the second RE, then the first RE and the second RE are not aligned, and one first RE remains unaligned. Figure 10 As shown in (b), if the bottom of the first RE1 is located at the center of the second RE, and the bottom of the first RE2 is aligned with the bottom of the second RE, then the first RE and the second RE are aligned, meaning the second frequency domain offset is an integer multiple of the second RE. For example, continuing with the first RE and the second RE, if the bandwidth of the first RE is 120kHz and the bandwidth of the second RE is 480kHz, then... Figure 11 As shown in (a), if the top of the first RE is aligned with the top of the second RE, then the first RE and the second RE are not aligned, and one first RE remains unaligned. Figure 11 As shown in (b), if the top of the first RE1 is aligned with the top of the second RE, and the bottom of the first RE2 is located at the center of the second RE, then the first RE and the second RE are not aligned, and two first REs are left unaligned. Figure 11 As shown in (c), the top of the first RE1 is aligned with the top of the second RE, the bottom of the first RE2 is located at the center of the second RE, and the top of the first RE3 is located at the center of the second RE. Therefore, the first REs and second REs are not aligned, and three first REs remain unaligned. Figure 11 As shown in (d), if the top of the first RE1 is aligned with the top of the second RE, the bottom of the first RE2 is located at the center of the second RE, the top of the first RE3 is located at the center of the second RE, and the bottom of the first RE4 is aligned with the bottom of the second RE, then the first RE is aligned with the second RE, that is, the second frequency domain offset is an integer multiple of the second RE.

[0259] It can be seen that if the REs in the first SSB are aligned with the REs in the second SSB, the terminal only needs to consider the bandwidth of the REs in the second SSB when calculating the bandwidth corresponding to the second frequency domain offset. However, if the REs in the first SSB are not aligned with the REs in the second SSB, the terminal needs to consider not only the bandwidth of the REs in the second SSB but also the bandwidth of the unaligned REs in the first SSB, i.e., the remaining REs in the first SSB (hereinafter referred to as the remaining REs), when calculating the bandwidth corresponding to the second frequency domain offset. In this case, the first information needs an additional field, such as a third field, to indicate the number of these remaining REs, to ensure that the terminal can include these remaining REs in the calculation, thereby accurately calculating the bandwidth corresponding to the second frequency domain offset.

[0260] Specifically, the third field may include multiple bits to indicate the number of remaining first REs through a combination of 0s and 1s for each bit. The third field can be carried in ssb-SubcarrierOffset and pdcch-ConfigSIB1 mentioned above; that is, the third field can form a single field together with the first field, or together with the second field. Of course, the third field, the first field, and the second field can also be independent fields; there is no limitation on this. The correspondence between the number of bits in the third field and the number of remaining first REs is described below.

[0261] For example, the bandwidth of RE in the first SSB is 60KHz, and the bandwidth of RE in the second SSB can be 120KHz, 480KHz, or 960KHz. The correspondence between the number of bits in the third field and the number of remaining REs can be shown in Table 8 and Table 8 Continued below.

[0262] Table 8

[0263]

[0264] Table 8 (continued)

[0265]

[0266] For example, the bandwidth of RE in the first SSB is 120KHz, and the bandwidth of RE in the second SSB is 480KHz or 960KHz. The correspondence between the number of bits in the third field and the number of remaining REs can be shown in Table 9 below.

[0267] Table 9

[0268]

[0269] For example, the bandwidth of RE in the first SSB is 240KHz, and the bandwidth of RE in the second SSB is 480KHz or 960KHz. The correspondence between the number of bits in the third field and the number of remaining REs can be shown in Table 10 below.

[0270] Table 10

[0271]

[0272] It can be seen that the greater the difference in bandwidth between the REs in the first SSB and the REs in the second SSB, the more REs remain, and the more bits are required in the third field. Conversely, the smaller the difference in bandwidth between the first RE and the second RE, the fewer the number of first REs remain, and the fewer bits are required in the third field. Furthermore, the above indication method for the third field is merely an example and not a limitation. For instance, the third field can also indicate the number of remaining REs by the number of bits. For example, if the third field includes 6 bits, it indicates 6 remaining REs; if the second field includes 7 bits, it indicates 7 remaining REs, and so on.

[0273] For the terminal, it can configure Tables 8-10 above, or other similar tables, so that after receiving the first information, the terminal can traverse the corresponding tables based on the third field to determine the number of remaining REs. In this way, the terminal can determine the bandwidth corresponding to the number of remaining REs, as well as the bandwidth corresponding to the frequency domain offset at the RB granularity and / or the frequency domain offset at the RE granularity, thereby determining the bandwidth corresponding to the second frequency domain offset. For example, Figure 12 As shown in (a), the subcarrier spacing of the first SSB is 60 kHz, and the subcarrier spacing of the second SSB is 120 kHz. The bandwidth corresponding to the second frequency domain offset is: 120 kHz * 24 = 120 kHz * 12 * 2 = 2880 kHz. For example, Figure 12 As shown in (b), the subcarrier spacing of the first SSB is 60kHz, and the subcarrier spacing of the second SSB is 120kHz. If there is one RE remaining, the bandwidth corresponding to the second frequency domain offset is: 120kHz * 8 + 60kHz = 1020kHz. For example, Figure 12 As shown in (c), the subcarrier spacing of the first SSB is 120KHz, and the subcarrier spacing of the second SSB is 480KHz. If there are 3 REs remaining, the bandwidth corresponding to the second frequency domain offset is: 480KHz*12*2+480KHz*8+120KHz*3=15720KHz.

[0274] It should be understood that, in the case where the subcarrier spacings of the first SSB and the second SSB are different, the use of the first information to indicate the subcarrier spacing of the second SSB is merely an example and not a limitation. For example, when the subcarrier spacings of the first SSB and the second SSB are the same, the first information can also be used to indicate the subcarrier spacing of the second SSB. Furthermore, the above example uses the case where the subcarrier spacing of the first SSB is less than the subcarrier spacing of the second SSB. When the subcarrier spacing of the first SSB is greater than the subcarrier spacing of the second SSB, the specific implementation principle can be found in the relevant introduction regarding the case where the subcarrier spacing of the first SSB is less than the subcarrier spacing of the second SSB, and will not be repeated here.

[0275] In summary, based on Figure 6 As shown in the method, by indicating the frequency domain location of the second SSB (i.e., the frequency domain location of the on SSB) through the first information, the terminal can determine the frequency domain location of the PDCCH based on the frequency domain location of the second SSB. Thus, when there are multiple synchronization gratings within the frequency band, the terminal can receive the PDCCH directly at that frequency domain location without scanning other synchronization gratings or other frequency points within the band. This reduces communication latency, improves communication reliability, and increases communication efficiency, enabling the terminal to quickly complete functions such as ANR determination, CGI reporting, initial cell access, cell handover, and cell reselection.

[0276] For example, Figure 13 Flowchart of the communication method provided in the embodiments of this application Figure 2 This communication method can be applied to Figure 3 Communication between any two nodes, such as between a terminal and a wireless access network device. Figure 13 As shown, the communication method includes the following steps:

[0277] S1301, the radio access network device sends the second information of the first SSB to the terminal. Correspondingly, the terminal receives the second information of the first SSB from the radio access network device.

[0278] The first SSB is located within the frequency band, excluding the synchronization grating. For details on its implementation, please refer to the relevant description in S401 above; it will not be repeated here. The second information is used to indicate the third frequency domain position, which is the frequency domain position of the PDCCH. This PDCCH is the PDCCH indicated by the second SSB. The second SSB and the first SSB are located within the same frequency band, and the second SSB is located on the synchronization grating within that frequency band. The specific implementation principles of the second SSB and the PDCCH can also be referred to the relevant description in S401 above; they will not be repeated here.

[0279] The third frequency domain location may include a third frequency domain offset. This third frequency domain offset can be the frequency domain offset between the first SSB and the PDCCH.

[0280] In Method A, the third frequency domain offset can be the frequency domain offset between a certain RB in the first SSB (e.g., the first RB) and a certain RB in the PDCCH (e.g., the third RB). Here, the first RB is the RB with the lowest index in the first SSB, and the third RB is the RB with the lowest index in the PDCCH, but this is not a limitation. For example, the first RB could also be the RB with the highest index in the first SSB, and the third RB could also be the RB with the highest index in the PDCCH; or, the first RB could also be an RB with an intermediate index in the first SSB, and the third RB could also be an RB with an intermediate index in the PDCCH. Furthermore, the specific implementation principles of the first RB and the third RB can be referred to the relevant introduction in Method 1 above, and will not be repeated here.

[0281] In Method B, the third frequency domain offset can be the frequency domain offset between a RE in the first RB (e.g., the first RE) and a RE in the third RB (e.g., the third RE). The first RE is the RE with the lowest index in the first RB, and the third RE is the RE with the lowest index in the third RB, but this is not a limitation. For example, the first RE could also be the RE with the highest index in the first RB, and the third RE could also be the RE with the highest index in the third RB; or, the first RE could also be an RB with an intermediate index in the first RB, and the third RE could also be a RE with an intermediate index in the third RB. Furthermore, the specific implementation principles of the first RE and the third RE can be referred to the relevant description in Method 2 above, and will not be repeated here. In Method C, the third frequency domain offset can be the frequency domain offset between the frequency point of the first SSB and the frequency point of the PDCCH. The specific implementation can also be referred to the relevant description in Method 3 above, and will not be repeated here.

[0282] The above descriptions of methods A through C clarify the definition of the third frequency domain offset in this application. For ease of understanding, the third frequency domain offset referred to below will adopt the definition in method A. Furthermore, the inclusion of the third frequency domain offset in the third frequency domain position is merely an example and not a limitation; for instance, the third frequency domain position may also include the frequency point of the PDCCH.

[0283] It is understandable that, since RB and RE are frequency domain resources of different granularities, the frequency domain offset between the first SSB and PDCCH can be at the RB granularity, the RE granularity, or a combination of RB and RE granularities. In other words, the third frequency domain offset can also include at least one of the following: a frequency domain offset at the RB granularity or a frequency domain offset at the RE granularity. For the specific implementation of the RB granularity frequency domain offset and the RE granularity frequency domain offset, please refer to the relevant introduction of the RB and RE granularity frequency domain offsets in the second frequency domain offset section above, which will not be repeated here. The second information can include multiple fields to indicate the RB granularity frequency domain offset and the RE granularity frequency domain offset. For example, the second information includes a fourth field and a fifth field, where the fourth field indicates the RB granularity frequency domain offset and the fifth field indicates the RE granularity frequency domain offset. The second information can be carried in the MIB of the first SSB. For example, the fourth and fifth fields of the second information can both be carried in the MIB of the first SSB, or the fourth or fifth field of the second information can be carried in the MIB of the first SSB. These will be described separately below.

[0284] In scenario 1, the fourth and fifth fields in the second information are both carried in the MIB of the first SSB. The specific implementation of this MIB can be found in Table 5 above. Thus, ssb-SubcarrierOffset and pdcch-ConfigSIB1 in the MIB can include the third and fourth fields to indicate the third frequency domain offset as a whole. For example, ssb-SubcarrierOffset indicates the frequency domain offset at the RB granularity in the third frequency domain offset, i.e., INTEGER includes the fourth field; pdcch-ConfigSIB1 indicates the frequency domain offset at the RE granularity in the third frequency domain offset, i.e., PDCCH-ConfigSIB1 includes the fifth field; or, ssb-SubcarrierOffset indicates the frequency domain offset at the RE granularity in the third frequency domain offset, i.e., INTEGER includes the fifth field; pdcch-ConfigSIB1 indicates the frequency domain offset at the RB granularity in the third frequency domain offset, i.e., PDCCH-ConfigSIB1 includes the fourth field. In addition, either the fourth or fifth field can be an existing field in the MIB or a newly added field; there are no restrictions on this.

[0285] Optionally, if the subcarrier spacing of the first SSB and the PDCCH are different—for example, the subcarrier spacing of the first SSB is smaller than the subcarrier spacing of the PDCCH, or the subcarrier spacing of the first SSB is larger than the subcarrier spacing of the PDCCH—the second information described above can also be used to indicate the subcarrier spacing of the PDCCH. In this case, since the third frequency domain offset may not be aligned at the RE granularity, i.e., there may be surplus REs in the first SSB or the PDCCH, the second information also needs an additional field, such as a sixth field, to indicate the number of these surplus REs, to ensure that the terminal can accurately calculate the bandwidth corresponding to the third frequency domain offset. The specific implementation of the PDCCH subcarrier spacing can be found in the above description of the second SSB subcarrier spacing, and the specific implementation of the sixth field can be found in the above description of the third field; these details will not be repeated here.

[0286] In scenario 2, only the fourth field of the second information is carried in the MIB of the first SSB. The specific implementation of this MIB can also be found in Table 5 above. Thus, pdcch-ConfigSIB1 in the MIB can include the fourth field but not the fifth field, used to indicate the frequency domain offset at the RB granularity. In this case, if the third frequency domain offset only has the RB granularity frequency domain offset, the terminal can determine the third frequency domain offset based solely on the fourth field. However, if the third frequency domain offset also has the RE granularity frequency domain offset, the terminal needs to know the RE granularity frequency domain offset to determine the third frequency domain offset. In this case, the RE granularity frequency domain offset can be pre-configured locally on the terminal, as shown in Table 11 below.

[0287] Table 11

[0288] RB-level frequency domain offset Frequency domain offset at RE granularity 2 RB 8 REs 3 RB 4 REs 4 RB 6 REs …… ……

[0289] In Table 11, the frequency domain offset of the RE granularity corresponding to the frequency domain offset of each RB granularity is fixed and unique, so that the terminal can determine the frequency domain offset of the RE granularity corresponding to the frequency domain offset of the RB granularity based on the frequency domain offset of the RB granularity indicated by the fourth field, thereby determining the third frequency domain offset.

[0290] In scenario 3, only the fifth field of the second information is carried in the MIB of the first SSB. The specific implementation of this MIB can also be referenced in Table 5 above. Thus, pdcch-ConfigSIB1 in the MIB can include the fifth field but not the fourth field, used to indicate the frequency domain offset at the RE granularity. In this case, if the third frequency domain offset only has the RE granularity frequency domain offset, the terminal can determine the third frequency domain offset based solely on the fifth field. However, if the third frequency domain offset also has the RB granularity frequency domain offset, the terminal needs to know the RB granularity frequency domain offset to determine the third frequency domain offset. In this case, the RB granularity frequency domain offset can be pre-configured locally on the terminal, as shown in Table 11 above. That is, the RB granularity frequency domain offset corresponding to each RE granularity frequency domain offset is fixed and unique, allowing the terminal to determine the RB granularity frequency domain offset corresponding to the RE granularity frequency domain offset indicated by the fifth field, thereby determining the third frequency domain offset.

[0291] S1302, the radio access network device sends a PDCCH to the terminal. Correspondingly, the terminal receives the PDCCH from the radio access network device based on the second information.

[0292] The PDCCH, the first SSB, and the second SSB are located in the same frequency band. The terminal can determine the absolute frequency position of the PDCCH, i.e., the frequency point of the PDCCH, based on the third frequency domain position indicated by the second information (i.e., the third frequency domain offset) and the frequency domain position of the first SSB, and then search at that frequency point to receive the PDCCH. Furthermore, the specific implementation of the frequency domain position of the first SSB can be found in the relevant introduction to the off-SSB frequency domain position in "3. SSB" above, and will not be repeated here.

[0293] Optionally, in combination with scenarios 2 and 3 above, in the second application scenario of the above embodiments, before S1302, the method may further include: the wireless access network device sending third information to the terminal, and correspondingly, the terminal receiving the third information from the wireless access network device.

[0294] The aforementioned third information can be used to indicate information in the MIB, such as the second information indicating the frequency domain location of the PDCCH. This third information can be carried in the MIB of the first SSB. For example, in scenario 2 or scenario 3, the ssb-SubcarrierOffset in this MIB is not used to carry the fourth or fifth field, so the ssb-SubcarrierOffset can be used to carry the third information.

[0295] It should be noted that the above-described indication method for the third information is merely an example and is not intended to be limiting. For instance, the first frequency domain offset (1) is carried in the MIB of the first SSB. st When the MIB does not carry the second information (offset), the third information can also be used to indicate that the information in the MIB indicates the first frequency domain offset. Specifically, the third information can carry an indication field. If the value of the indication field is greater than a threshold, the third information indicates that the information in the MIB indicates the frequency domain position of the PDCCH. If the value of the indication field is less than or equal to the threshold, the third information indicates that the information in the MIB indicates the first frequency domain offset. In this way, after receiving the third information, the terminal can determine whether the information in the MIB indicates the frequency domain position of the PDCCH or the first frequency domain offset based on the value of the indication field in the third information. This can prevent the terminal from incorrectly determining the frequency domain position, such as mistaking the frequency domain position of the PDCCH indicated by the second information as the frequency domain position of the first SSB or the second SSB, thus failing to receive the PDCCH and ensuring the reliability of communication.

[0296] In summary, based on Figure 13 As shown in the method, when there are multiple synchronization gratings in the frequency band, by indicating the frequency domain position of the PDCCH through the first information, the terminal can receive the PDCCH directly at the frequency domain position without scanning other synchronization gratings or other frequency points in the frequency band. This can reduce communication latency, improve communication reliability, and improve communication efficiency, enabling the terminal to quickly complete functions such as ANR determination, CGI reporting, initial cell access, cell handover, and cell reselection.

[0297] For example, Figure 14 Flowchart of the communication method provided in the embodiments of this application Figure 3 This communication method can be applied to Figure 3 Communication between any two nodes, such as between a terminal and a wireless access network device. Figure 14 As shown, the communication method includes the following steps:

[0298] S1401, the radio access network device sends a second SSB to the terminal on the first synchronization grating. Correspondingly, the terminal receives the second synchronization information block SSB from the radio access network device on the first synchronization grating.

[0299] The second SSB is located on the first synchronization grating. The first synchronization grating is one of multiple synchronization gratings located in the same frequency band. For specific implementation details, please refer to the relevant description in S401 above, which will not be repeated here.

[0300] For the terminal, since it doesn't know in advance which synchronization grating within the frequency band the second SSB resides on, it can search for the second SSB sequentially on each synchronization grating, such as in ascending or descending order of their indexes, until it finds the first synchronization grating and receives the second SSB on that grating. Specifically, because the second SSB is a periodically transmitted SSB, the terminal can search each synchronization grating for one cycle's duration according to the second SSB's period. If the second SSB is not received, the terminal continues searching on the next synchronization grating for one cycle's duration, and so on, until the second SSB is received.

[0301] For example, such as Figure 15 As shown, the frequency band includes four synchronization gratings: synchronization grating 1, synchronization grating 2, synchronization grating 3, and synchronization grating 4. The second SSB is located on synchronization grating 3. The terminal can search on synchronization gratings 1, 2, 3, and 4 in ascending order of index. Alternatively, the terminal can search on synchronization gratings 4, 3, 2, and 1 in descending order of index. Taking the ascending order of index as an example, first, the terminal searches on synchronization grating 1 for the duration of the first period (T1) and determines that no second SSB has been received within T1. Then, the terminal searches on synchronization grating 2 for the duration of the second period (T2) and determines that no second SSB has been received within T2. ​​Finally, the terminal searches on synchronization grating 3 for the duration of the third period (T3) and determines that the second SSB has been received within T3, then stops searching.

[0302] It should be understood that the terminal searching for the second SSB sequentially on each synchronization grating in the order of the synchronization gratings is only one example. For example, the terminal can randomly search for the second SSB on a certain synchronization grating. If the second SSB is not found, it continues to randomly search for the second SSB on the next synchronization grating until the second SSB is received.

[0303] S1402, the radio access network device sends a PDCCH to the terminal. Correspondingly, the terminal receives the PDCCH from the radio access network device.

[0304] Here, the PDCCH is the PDCCH indicated by the second SSB. It can be understood that the second SSB carries the aforementioned first frequency domain offset; for example, the MIB of the second SSB can carry this first frequency domain offset. For specific implementation details, please refer to "3. SSB" and the relevant description in S402 above, which will not be repeated here. The terminal can determine the frequency domain position of the PDCCH based on the second frequency domain offset and the frequency domain position of the first synchronization grating, so as to receive the PDCCH at that frequency domain position.

[0305] Optionally, in the third application scenario of the above embodiments, before S1401, the method may further include: the wireless access network device sending fourth information to the terminal, and correspondingly, the terminal receiving the fourth information from the wireless access network device.

[0306] The fourth information can be used to indicate the frequency domain location of the first SSB. The first SSB and the second SSB are located within the same frequency band. The specific implementation of the first SSB can be found in the relevant description in S401 above, and will not be repeated here. The fourth information may include the ARFCN-NR value of the first SSB. This ARFCN-NR value is unique in the frequency domain, and the fourth information can accurately indicate the frequency domain location of the first SSB through this ARFCN-NR value.

[0307] In one implementation, after receiving the fourth information, the terminal can determine the frequency domain positional relationship between each synchronization grating and the first SSB. Based on this relationship, it can determine whether a second SSB from the wireless access network device is received on each synchronization grating, until the second SSB is received. This frequency domain positional relationship can refer to the proximity of each synchronization grating to the first SSB. For example, among multiple synchronization gratings, which gratings are close to the first SSB and thus located in the same region, and which are far away and not located in the same region. This region can refer to the upper half of the frequency band, i.e., the area formed by the bandwidth between the highest and center frequencies, or the lower half of the frequency band, i.e., the area formed by the bandwidth between the center and lowest frequencies. Specifically, the terminal can determine whether the first SSB is located in the upper or lower half of the frequency band based on its frequency domain position. For example, the terminal can determine the frequency domain location of the first SSB, that is, the bandwidth difference between the frequency of the first SSB and the lowest frequency of the frequency band. If the bandwidth difference is greater than half the bandwidth of the frequency band, it indicates that the first SSB is located in the upper half of the frequency band; conversely, if the bandwidth difference is less than half the bandwidth of the frequency band, it indicates that the first SSB is located in the lower half of the frequency band. Furthermore, the terminal can determine the synchronization gratings located in the same half of the frequency band as the first SSB, and the synchronization gratings not located in the same half of the frequency band as the first SSB. Thus, the terminal can first detect the synchronization gratings located in the same half of the frequency band as the first SSB. If a second SSB is received at this point, the detection stops; if a second SSB is not received, the detection continues to check the synchronization gratings not located in the same half of the frequency band as the first SSB to receive the second SSB.

[0308] For example, such as Figure 16As shown, the highest frequency of the frequency band is 66.0 GHz, the lowest frequency is 65.9 GHz, and the half-bandwidth is 50 MHz. The frequency band includes four synchronization gratings: synchronization grating 1, synchronization grating 2, synchronization grating 3, and synchronization grating 4. The second SSB is located on synchronization grating 3, and the frequency of the first SSB is 65.967 GHz. The terminal can determine the bandwidth difference of 67 MHz between the first SSB's frequency of 65.967 GHz and the lowest frequency of 65.9 GHz. Since 67 MHz is greater than 50 MHz, the terminal can determine that the first SSB is located in the upper half of the frequency band. The synchronization gratings located in the upper half of the frequency band include synchronization grating 3 and synchronization grating 4, while the synchronization gratings located in the lower half of the frequency band include synchronization grating 1 and synchronization grating 2. Therefore, the terminal can first detect synchronization gratings 3 and 4 to receive the second SSB.

[0309] It is understandable that, since the first SSB is usually located in the frequency domain close to the second SSB, the terminal prioritizes detecting the synchronization grating that is closer in the frequency domain according to the frequency domain position relationship, so that it can receive the second SSB as early as possible, so that the terminal can complete functions such as ANR determination, CGI reporting, initial cell access, cell handover, and cell reselection as soon as possible.

[0310] In another implementation, after receiving the fourth information, the terminal can determine the frequency domain interval between each synchronization grating and the frequency domain position of the first SSB, in order to determine whether a second SSB from the radio access network device is received on the synchronization grating corresponding to each frequency domain interval. For example, the terminal can determine whether a second SSB from the radio access network device is received on the synchronization grating corresponding to each frequency domain interval according to the order of the frequency domain intervals, such as from smallest to largest, until the second SSB is received.

[0311] For example, such as Figure 16 As shown, the terminal can determine the frequency domain spacing between the first SSB and the four synchronization gratings from smallest to largest, namely: the frequency domain spacing between the first SSB and synchronization grating 3, the frequency domain spacing between the first SSB and synchronization grating 4, the frequency domain spacing between the first SSB and synchronization grating 2, and the frequency domain spacing between the first SSB and synchronization grating 1. Thus, the terminal can first detect synchronization grating 3, thereby receiving the second SSB.

[0312] It should be understood that since the first SSB is usually located in the frequency domain close to the second SSB, the terminal prioritizes detecting the synchronization grating with a smaller frequency domain interval, i.e., a closer frequency domain location, according to the order of frequency domain interval size. This allows the terminal to receive the second SSB as early as possible, so that it can complete functions such as ANR determination, CGI reporting, initial cell access, cell handover, and cell reselection as soon as possible.

[0313] In summary, based on Figure 14 As shown in the method, when there are multiple synchronization gratings in the same frequency band, the terminal can still receive the second SSB it needs to receive on the corresponding synchronization grating, such as the first synchronization grating, which is called on SSB. This ensures that the terminal can successfully complete functions such as ANR determination, CGI reporting, initial cell access, cell handover, and cell reselection.

[0314] The above combination Figures 4-16 The communication method provided in the embodiments of this application is described in detail below. Figures 17-20 This document describes in detail the communication apparatus used to perform the communication method provided in the embodiments of this application.

[0315] For example, Figure 17 This is a schematic diagram of the structure of the communication device provided in the embodiments of this application. Figure 1 .like Figure 17 As shown, the communication device 1700 includes modules for performing the above-described method, such as a transceiver module 1701 and a processing module 1702. For ease of explanation, Figure 17 Only the main components of the communication device are shown.

[0316] In some embodiments, the communication device 1700 may be adapted to Figure 3 In the communication system shown, the execution Figure 4 The terminal function is shown in the method.

[0317] The transceiver module 1701 is used to receive first synchronization information and first information of the Physical Broadcast Channel Block (SSB) from the radio access network device. The processing module 1702 is used to control the transceiver module to receive the downlink control channel (PDCCH) from the radio access network device based on the first information. The first information indicates a first frequency domain position, which is the frequency domain position of the second SSB. The first SSB and the second SSB are located in the same frequency band. The first SSB is located within the frequency band, excluding the synchronization grating, and the second SSB is located on the synchronization grating within the frequency band.

[0318] In one possible design, the first information may include at least one of the following: the absolute frequency domain position of the second SSB, the relative frequency domain position of the second SSB, or the frequency domain position indication information of the second SSB.

[0319] Optionally, the relative frequency domain position may include a second frequency domain offset, which is the frequency domain offset between the first SSB and the second SSB.

[0320] Furthermore, the second frequency domain offset may include at least one of the following: a frequency domain offset at the resource block (RB) granularity, or a frequency domain offset at the resource element (RE) granularity.

[0321] Optionally, the absolute frequency domain location may include: frequency point ARFCN - new air interface NR value.

[0322] Optionally, the frequency domain location indication information may include at least one of the following: the Global Synchronization Number (GSCN) of the synchronization grating, or the frequency domain location index of the synchronization grating.

[0323] In one possible design, the first information can also be used to indicate the subcarrier spacing (SCS) of the second SSB to ensure that the terminal can accurately determine the second frequency domain offset.

[0324] In one possible design, the first information is carried in at least one of the following in the first SSB: the main information block (MIB) or the new air interface parameters of the measurement target.

[0325] In one possible design, the processing module 1702 is further configured to determine the second frequency domain position of the PDCCH based on the first information and the first frequency domain offset. The transceiver module 1701 is further configured to receive the PDCCH from the radio access network device at the second frequency domain position. The first frequency domain offset is the frequency domain offset between the second SSB and the PDCCH.

[0326] Optionally, the first frequency domain offset is carried in the first SSB or the second SSB.

[0327] Optionally, the PDCCH, the first SSB, and the second SSB are located in the same frequency band.

[0328] Optionally, the transceiver module 1701 may also include a transmitting module. Figure 17 (not shown in the image) and receiving module ( Figure 17 (not shown in the diagram), wherein the transmitting module is used to implement the transmitting function of the communication device 1700, and the receiving module is used to implement the receiving function of the communication device 1700.

[0329] Optionally, the communication device 1700 may also include a storage module. Figure 17 (Not shown in the image), this storage module stores programs or instructions. When the processing module executes the program or instructions, it enables the communication device 1700 to perform operations. Figure 4 The terminal functionality is shown in the method.

[0330] It should be understood that the processing module involved in the communication device 1700 can be implemented by a processor or processor-related circuit components, and can be a processor or processing unit; the transceiver module can be implemented by a transceiver or transceiver-related circuit components, and can be a transceiver or transceiver unit.

[0331] It should be noted that the communication device 1700 may be a terminal, a chip (system) or other component or assembly that can be set in the terminal, or a device that includes the terminal. This application does not limit this.

[0332] In addition, the technical effects of the communication device 1700 can be referenced. Figure 4 The technical effects of the terminal in the method shown will not be elaborated here.

[0333] In other embodiments, the communication device 1700 may be adapted to Figure 3 In the communication system shown, the execution Figure 13 The terminal function is shown in the method.

[0334] The transceiver module 1701 is used to receive a first synchronization information block (SSB) and second information from the radio access network device. The processing module 1702 is used to receive a downlink control channel (PDCCH) from the radio access network device according to the second information. The second information indicates a third frequency domain position, which is the frequency domain position of the PDCCH. The PDCCH is the PDCCH indicated by the second SSB. The first SSB and the second SSB are located in the same frequency band. The first SSB is located in a position within the frequency band other than the synchronization grating, and the second SSB is located on the synchronization grating within the frequency band.

[0335] In one possible design, the third frequency domain position includes a third frequency domain offset, which is the frequency domain offset between the first SSB and the PDCCH.

[0336] Optionally, the third frequency domain offset may include at least one of the following: a frequency domain offset at the resource block (RB) granularity, or a frequency domain offset at the resource element (RE) granularity.

[0337] In one possible design, the second information is also used to indicate the subcarrier spacing of the PDCCH.

[0338] In one possible design, the second information is carried in the main information block (MIB) of the first SSB.

[0339] Optionally, the transceiver module 1701 is further configured to receive third information from the radio access network device before receiving the downlink control channel PDCCH from the radio access network device, wherein the third information is used to indicate that the third frequency domain position indicated by the second information is the frequency domain position of the PDCCH.

[0340] In one possible design, the PDCCH, the first SSB, and the second SSB are located in the same frequency band.

[0341] Optionally, the transceiver module 1701 may also include a transmitting module. Figure 17(not shown in the image) and receiving module ( Figure 17 (not shown in the diagram), wherein the transmitting module is used to implement the transmitting function of the communication device 1700, and the receiving module is used to implement the receiving function of the communication device 1700.

[0342] Optionally, the communication device 1700 may also include a storage module. Figure 17 (Not shown in the image), this storage module stores programs or instructions. When the processing module executes the program or instructions, it enables the communication device 1700 to perform operations. Figure 13 The terminal functionality is shown in the method.

[0343] It should be understood that the processing module involved in the communication device 1700 can be implemented by a processor or processor-related circuit components, and can be a processor or processing unit; the transceiver module can be implemented by a transceiver or transceiver-related circuit components, and can be a transceiver or transceiver unit.

[0344] It should be noted that the communication device 1700 may be a terminal, a chip (system) or other component or assembly that can be set in the terminal, or a device that includes the terminal. This application does not limit this.

[0345] In addition, the technical effects of the communication device 1700 can be referenced. Figure 13 The technical effects of the terminal in the method shown will not be elaborated here.

[0346] In some other embodiments, the communication device 1700 may be adapted to Figure 3 In the communication system shown, the execution Figure 14 The terminal function is shown in the method.

[0347] The transceiver module, 1701, is used to receive a second synchronization information block (SSB) from a radio access network (RAN) device on a first synchronization grating, and to receive a downlink control channel (PDCCH) from the RAN device. The first synchronization grating is one of multiple synchronization gratings located in the same frequency band. The PDCCH is the PDCCH indicated by the second SSB.

[0348] In one possible design, the fourth information is used to indicate the frequency domain position of the first SSB, and the first SSB and the second SSB are located within the same frequency band. The transceiver module 1701 is further configured to receive the fourth information from the radio access network device, and the processing module 1702 is configured to determine the frequency domain positional relationship between the multiple synchronization gratings and the frequency domain position of the first SSB, so as to determine, based on the frequency domain positional relationship, whether the second SSB from the radio access network device has been received on each synchronization grating.

[0349] Optionally, the frequency domain positional relationship can refer to the proximity relationship between multiple synchronization gratings and their frequency domain positions.

[0350] In one possible design, the fourth information is used to indicate the frequency domain location of the first SSB, and the first SSB and the second SSB are located within the frequency band. The transceiver module 1701 is also used to receive the fourth information from the radio access network device, and the processing module 1702 is used to determine multiple frequency domain intervals between multiple synchronization gratings and frequency domain locations, so as to determine whether the second SSB from the radio access network device is received on the synchronization grating corresponding to each frequency domain interval.

[0351] Optionally, the processing module 1702 is further configured to determine, according to the order of the size of the multiple frequency domain intervals, whether a second SSB from the wireless access network device is received on the synchronization grating corresponding to each frequency domain interval.

[0352] In one possible design, the fourth information may include: the frequency point ARFCN of the first SSB - the new radio NR value.

[0353] Optionally, the transceiver module 1701 may also include a transmitting module. Figure 17 (not shown in the image) and receiving module ( Figure 17 (not shown in the diagram), wherein the transmitting module is used to implement the transmitting function of the communication device 1700, and the receiving module is used to implement the receiving function of the communication device 1700.

[0354] Optionally, the communication device 1700 may also include a storage module. Figure 17 (Not shown in the image), this storage module stores programs or instructions. When the processing module executes the program or instructions, it enables the communication device 1700 to perform operations. Figure 14 The terminal functionality is shown in the method.

[0355] It should be understood that the processing module involved in the communication device 1700 can be implemented by a processor or processor-related circuit components, and can be a processor or processing unit; the transceiver module can be implemented by a transceiver or transceiver-related circuit components, and can be a transceiver or transceiver unit.

[0356] It should be noted that the communication device 1700 may be a terminal, a chip (system) or other component or assembly that can be set in the terminal, or a device that includes the terminal. This application does not limit this.

[0357] In addition, the technical effects of the communication device 1700 can be referenced. Figure 14 The technical effects of the terminal in the method shown will not be elaborated here.

[0358] For example, Figure 18 This is a schematic diagram of the structure of the communication device provided in the embodiments of this application. Figure 2 .like Figure 18 As shown, the communication device 1800 includes modules for performing the above-described methods, such as a transceiver module 1801. For ease of explanation, Figure 18 Only the main components of the communication device are shown.

[0359] In some embodiments, the communication device 1800 may be adapted to Figure 3 In the communication system shown, the execution Figure 4 The method shown illustrates the function of the wireless access network device.

[0360] The transceiver module 1801 is used to send first synchronization information and first information of the Physical Broadcast Channel Block (SSB) to the terminal, and to send downlink control channel (PDCCH) to the terminal. The first information indicates a first frequency domain location, which is the frequency domain location of the second SSB. The first and second SSBs are located in the same frequency band. The first SSB is located within the frequency band, excluding the synchronization grating, and the second SSB is located on the synchronization grating within the frequency band. The PDCCH is the PDCCH indicated by the second SSB.

[0361] In one possible design, the first information may include at least one of the following: the absolute frequency domain position of the second SSB, the relative frequency domain position of the second SSB, or the frequency domain position indication information of the second SSB.

[0362] Optionally, the relative frequency domain position may include a second frequency domain offset, which is the frequency domain offset between the first SSB and the second SSB.

[0363] Furthermore, the second frequency domain offset may include at least one of the following: a frequency domain offset at the resource block (RB) granularity, or a frequency domain offset at the resource element (RE) granularity.

[0364] Optionally, the absolute frequency domain location may include: frequency point ARFCN - new air interface NR value.

[0365] Optionally, the frequency domain location indication information may include at least one of the following: the Global Synchronization Number (GSCN) of the synchronization grating, or the frequency domain location index of the synchronization grating.

[0366] In one possible design, the first information can also be used to indicate the subcarrier spacing (SCS) of the second SSB.

[0367] In one possible design, the first information is carried in at least one of the following in the first SSB: the Master Information Block (MIB) or the new air interface parameters of the measurement target.

[0368] In one possible design, the transceiver module 1801 is further configured to send a first frequency domain offset to the terminal before sending the downlink control channel PDCCH to the terminal. The first frequency domain offset is the frequency domain offset between the second SSB and the PDCCH.

[0369] Optionally, the first frequency domain offset is carried in the first SSB or the second SSB.

[0370] Optionally, the PDCCH, the first SSB, and the second SSB can be located in the same frequency band.

[0371] Optionally, the transceiver module 1801 may also include a transmitting module. Figure 18 (not shown in the image) and receiving module ( Figure 18 (not shown in the diagram), wherein the transmitting module is used to implement the transmitting function of the communication device 1800, and the receiving module is used to implement the receiving function of the communication device 1800.

[0372] Optionally, the communication device 1800 may also include a processing module. Figure 18 (Not shown in the image). The processing module is used to implement the processing functions of the communication device 1800.

[0373] Optionally, the communication device 1800 may also include a storage module. Figure 18 (Not shown in the image), this storage module stores programs or instructions. When the processing module executes the program or instructions, it enables the communication device 1800 to perform operations. Figure 4 The method shown illustrates the functions of the wireless access network device.

[0374] It should be understood that the processing module involved in the communication device 1800 can be implemented by a processor or processor-related circuit components, and can be a processor or processing unit; the transceiver module can be implemented by a transceiver or transceiver-related circuit components, and can be a transceiver or transceiver unit.

[0375] It should be noted that the communication device 1800 can be a network device, such as a wireless access network device, or a chip (system) or other component or assembly that can be set in a network device, or a device that includes a network device. This application does not limit this.

[0376] In addition, the technical effects of the communication device 1800 can be referenced. Figure 4 The technical effects of the wireless access network devices in the methods shown will not be elaborated here.

[0377] In other embodiments, the communication device 1800 may be adapted to Figure 3 In the communication system shown, the execution Figure 13 The method shown illustrates the function of the wireless access network device.

[0378] The transceiver module 1801 is used to send a first synchronization information block (SSB) and second information to the terminal, and to send a downlink control channel (PDCCH) to the terminal. The second information indicates a third frequency domain position, the first frequency domain position is the frequency domain position of the PDCCH, the PDCCH is the PDCCH indicated by the second SSB, the first SSB and the second SSB are located in the same frequency band, the first SSB is located in a position within the frequency band excluding the synchronization grating, and the second SSB is located on the synchronization grating within the frequency band.

[0379] In one possible design, the third frequency domain position includes a third frequency domain offset, which is the frequency domain offset between the first SSB and the PDCCH.

[0380] Optionally, the third frequency domain offset may include at least one of the following: a frequency domain offset at the resource block (RB) granularity, or a frequency domain offset at the resource element (RE) granularity.

[0381] In one possible design, the second information is also used to indicate the subcarrier spacing of the PDCCH.

[0382] In one possible design, the second information is carried in the main information block (MIB) of the first SSB.

[0383] Optionally, the transceiver module 1801 is further configured to send third information to the terminal before sending the downlink control channel PDCCH to the terminal, wherein the third information is used to indicate that the third frequency domain position indicated by the second information is the frequency domain position of the PDCCH.

[0384] In one possible design, the PDCCH, the first SSB, and the second SSB are located in the same frequency band.

[0385] Optionally, the transceiver module 1801 may also include a transmitting module. Figure 18 (not shown in the image) and receiving module ( Figure 18 (not shown in the diagram), wherein the transmitting module is used to implement the transmitting function of the communication device 1800, and the receiving module is used to implement the receiving function of the communication device 1800.

[0386] Optionally, the communication device 1800 may also include a processing module. Figure 18 (Not shown in the image). The processing module is used to implement the processing functions of the communication device 1800.

[0387] Optionally, the communication device 1800 may also include a storage module. Figure 18 (Not shown in the image), this storage module stores programs or instructions. When the processing module executes the program or instructions, it enables the communication device 1800 to perform operations. Figure 13 The method shown illustrates the functions of the wireless access network device.

[0388] It should be understood that the processing module involved in the communication device 1800 can be implemented by a processor or processor-related circuit components, and can be a processor or processing unit; the transceiver module can be implemented by a transceiver or transceiver-related circuit components, and can be a transceiver or transceiver unit.

[0389] It should be noted that the communication device 1800 can be a network device, such as a wireless access network device, or a chip (system) or other component or assembly that can be set in a network device, or a device that includes a network device. This application does not limit this.

[0390] In addition, the technical effects of the communication device 1800 can be referenced. Figure 13 The technical effects of the wireless access network devices in the methods shown will not be elaborated here.

[0391] In some other embodiments, the communication device 1800 may be adapted to Figure 3 In the communication system shown, the execution Figure 14 The method shown illustrates the function of the wireless access network device.

[0392] The transceiver module 1801 is used to transmit a second synchronization information block (SSB) to the terminal on the first synchronization grating and to transmit a downlink control channel (PDCCH) to the terminal. The first synchronization grating is one of multiple synchronization gratings located in the same frequency band. The PDCCH is the PDCCH indicated by the second SSB.

[0393] In one possible design, the fourth information is used to indicate the frequency domain location of the first SSB, which is located within the same frequency band as the second SSB. The transceiver module is also used to send the fourth information to the terminal before sending the second synchronization information block SSB to the terminal on the first synchronization grating.

[0394] In one possible design, the fourth information may include: the frequency point ARFCN of the first SSB - the new radio NR value.

[0395] Optionally, the transceiver module 1801 may also include a transmitting module. Figure 18 (not shown in the image) and receiving module ( Figure 18 (not shown in the diagram), wherein the transmitting module is used to implement the transmitting function of the communication device 1800, and the receiving module is used to implement the receiving function of the communication device 1800.

[0396] Optionally, the communication device 1800 may also include a processing module. Figure 18 (Not shown in the image). The processing module is used to implement the processing functions of the communication device 1800.

[0397] Optionally, the communication device 1800 may also include a storage module. Figure 18 (Not shown in the image), this storage module stores programs or instructions. When the processing module executes the program or instructions, it enables the communication device 1800 to perform operations. Figure 14 The method shown illustrates the functions of the wireless access network device.

[0398] It should be understood that the processing module involved in the communication device 1800 can be implemented by a processor or processor-related circuit components, and can be a processor or processing unit; the transceiver module can be implemented by a transceiver or transceiver-related circuit components, and can be a transceiver or transceiver unit.

[0399] It should be noted that the communication device 1800 can be a network device, such as a wireless access network device, or a chip (system) or other component or assembly that can be set in a network device, or a device that includes a network device. This application does not limit this.

[0400] In addition, the technical effects of the communication device 1800 can be referenced. Figure 14 The technical effects of the wireless access network devices in the methods shown will not be elaborated here.

[0401] For example, Figure 19 Schematic diagram of the communication device provided in the embodiments of this application Figure 3 The communication device can be a terminal device or a network device, or it can be a chip (system) or other component or assembly that can be installed in the terminal device or network device. For example... Figure 19 As shown, the communication device 1900 may include a processor 1901. Optionally, the communication device 1900 may also include a memory 1902 and / or a transceiver 1903. The processor 1901 is coupled to the memory 1902 and the transceiver 1903, for example, they may be connected via a communication bus.

[0402] The following is combined with Figure 19 A detailed description of each component of the communication device 1900 is provided below:

[0403] The processor 1901 is the control center of the communication device 1900. It can be a single processor or a collective term for multiple processing elements. For example, the processor 1901 can be one or more central processing units (CPUs), application-specific integrated circuits (ASICs), or one or more integrated circuits configured to implement the embodiments of this application, such as one or more digital signal processors (DSPs), or one or more field-programmable gate arrays (FPGAs).

[0404] Optionally, the processor 1901 can perform various functions of the communication device 1900 by running or executing software programs stored in the memory 1902 and calling data stored in the memory 1902.

[0405] In a specific implementation, as one example, the processor 1901 may include one or more CPUs, for example... Figure 19 CPU0 and CPU1 are shown in the diagram.

[0406] In a specific implementation, as one example, the communication device 1900 may also include multiple processors, for example... Figure 2 The processors 1901 and 1904 are shown. Each of these processors can be a single-core processor or a multi-core processor. Here, "processor" can refer to one or more devices, circuits, and / or processing cores used to process data (e.g., computer program instructions).

[0407] The memory 1902 is used to store the software program that executes the solution of this application, and is controlled by the processor 1901 to execute it. The specific implementation method can be referred to the above method embodiment, and will not be repeated here.

[0408] Optionally, the memory 1902 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto. The memory 1902 may be integrated with the processor 1901 or may exist independently, and may be connected via the interface circuit of the communication device 1900. Figure 19 (Not shown in the image) is coupled to processor 1901, and this embodiment of the application does not specifically limit this.

[0409] Transceiver 1903 is used for communication with other communication devices. For example, if communication device 1900 is a terminal device, transceiver 1903 can be used to communicate with a network device or with another terminal device. As another example, if communication device 1900 is a network device, transceiver 1903 can be used to communicate with a terminal device or with another network device.

[0410] Alternatively, transceiver 1903 may include a receiver and a transmitter. Figure 19 (Not shown separately). The receiver is used to implement the receiving function, and the transmitter is used to implement the sending function.

[0411] Alternatively, the transceiver 1903 can be integrated with the processor 1901, or it can exist independently and be connected via the interface circuit of the communication device 1900. Figure 19 (Not shown in the image) is coupled to processor 1901, and this embodiment of the application does not specifically limit this.

[0412] It should be noted that, Figure 19 The structure of the communication device 1900 shown does not constitute a limitation on the communication device. Actual communication devices may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0413] Furthermore, the technical effects of the communication device 1900 can be referred to the technical effects of the communication method described in the above method embodiments, and will not be repeated here.

[0414] For example, Figure 20 Schematic diagram of the communication device provided in the embodiments of this application Figure 4 The communication device can be a terminal or network equipment, such as a wireless access network device, or it can be a chip (system) or other component or assembly that can be installed in the terminal or network equipment. Figure 20 As shown, the signal transmission device 2000 may include a logic circuit 2001 and an input / output interface 2002. The input / output interface 2002 is used to receive code instructions and transmit them to the logic circuit 2001. The logic circuit 2001 is used to execute the code instructions to perform the method described above.

[0415] Furthermore, the technical effects of the signal transmission device 2000 can be referred to the technical effects of the method described in the above method embodiments, and will not be repeated here.

[0416] This application provides a communication system. The communication system includes one or more terminal devices and one or more network devices.

[0417] It should be understood that the processor in the embodiments of this application can be a central processing unit (CPU), or it can be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0418] It should also be understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate synchronous DRAM (DDR SDRAM), enhanced synchronous DRAM (ESDRAM), synchronous linked DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0419] The above embodiments can be implemented, in whole or in part, by software, hardware (such as circuits), firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more sets of available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. A semiconductor medium can be a solid-state drive.

[0420] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural. Additionally, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects, but it can also represent an "and / or" relationship. Please refer to the context for a more accurate understanding.

[0421] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0422] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0423] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0424] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0425] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0426] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0427] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0428] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0429] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A communication method, characterized in that, include: The terminal receives first synchronization information and first information of physical broadcast channel block (SSB) from the wireless access network device. The first information is used to indicate a first frequency domain position, which is the frequency domain position of the second SSB. The first SSB and the second SSB are located in the same frequency band. The first SSB is located in the frequency band except for the synchronization grating, and the second SSB is located on the synchronization grating in the frequency band. The terminal determines the second frequency domain position of the downlink control channel PDCCH based on the first information and the first frequency domain offset, wherein the first frequency domain offset is the frequency domain offset between the second SSB and the PDCCH. The terminal receives the PDCCH from the wireless access network device at the second frequency domain location, the first frequency domain offset is carried in the first SSB or the second SSB, and the PDCCH is the PDCCH indicated by the second SSB.

2. The method according to claim 1, characterized in that, The first information includes at least one of the following: the absolute frequency domain position of the second SSB, the relative frequency domain position of the second SSB, or the frequency domain position indication information of the second SSB.

3. The method according to claim 2, characterized in that, The relative frequency domain position includes: a second frequency domain offset, which is the frequency domain offset between the first SSB and the second SSB.

4. The method according to claim 3, characterized in that, The second frequency domain offset includes at least one of the following: frequency domain offset at the resource block (RB) granularity, or frequency domain offset at the resource element (RE) granularity.

5. The method according to any one of claims 2-4, characterized in that, The absolute frequency domain location includes: frequency point ARFCN - new radio NR value.

6. The method according to any one of claims 2-4, characterized in that, The frequency domain location indication information includes at least one of the following: the Global Synchronization Number (GSCN) of the synchronization grating, or the frequency domain location index of the synchronization grating.

7. The method according to any one of claims 1-4, characterized in that, The first information is also used to indicate the subcarrier spacing (SCS) of the second SSB.

8. The method according to any one of claims 1-4, characterized in that, The first information is carried in at least one of the following in the first SSB: Master Information Block (MIB) or Measurement Target New Air Interface Parameters.

9. The method according to claim 1, characterized in that, The PDCCH, the first SSB, and the second SSB are located in the same frequency band.

10. A communication method, characterized in that, include: The wireless access network device sends first synchronization information and first information of the physical broadcast channel block (SSB) to the terminal. The first information is used to indicate the first frequency domain position, which is the frequency domain position of the second SSB. The first SSB and the second SSB are located in the same frequency band. The first SSB is located in the frequency band except for the synchronization grating, and the second SSB is located on the synchronization grating in the frequency band. The wireless access network device sends a first frequency domain offset to the terminal. The first frequency domain offset is the frequency domain offset between the second SSB and the downlink control channel PDCCH. The first frequency domain offset is carried in the first SSB or the second SSB. The wireless access network device sends the PDCCH to the terminal, and the PDCCH is the PDCCH indicated by the second SSB.

11. The method according to claim 10, characterized in that, The first information includes at least one of the following: the absolute frequency domain position of the second SSB, the relative frequency domain position of the second SSB, or the frequency domain position indication information of the second SSB.

12. The method according to claim 11, characterized in that, The relative frequency domain position includes: a second frequency domain offset, which is the frequency domain offset between the first SSB and the second SSB.

13. The method according to claim 12, characterized in that, The second frequency domain offset includes at least one of the following: frequency domain offset at the resource block (RB) granularity, or frequency domain offset at the resource element (RE) granularity.

14. The method according to any one of claims 11-13, characterized in that, The absolute frequency domain location includes: frequency point ARFCN - new radio NR value.

15. The method according to any one of claims 11-13, characterized in that, The frequency domain location indication information includes at least one of the following: the Global Synchronization Number (GSCN) of the synchronization grating, or the frequency domain location index of the synchronization grating.

16. The method according to any one of claims 10-13, characterized in that, The first information is also used to indicate the subcarrier spacing (SCS) of the second SSB.

17. The method according to any one of claims 10-13, characterized in that, The first information is carried in at least one of the following in the first SSB: Master Information Block (MIB) or Measurement Target New Air Interface Parameters.

18. The method according to claim 10, characterized in that, The PDCCH, the first SSB, and the second SSB are located in the same frequency band.

19. A communication device, characterized in that, include: The transceiver module and the processing module; among them, The transceiver module is used to receive first synchronization information and first information of physical broadcast channel block (SSB) from the wireless access network device. The first information is used to indicate a first frequency domain position, which is the frequency domain position of the second SSB. The first SSB and the second SSB are located in the same frequency band. The first SSB is located in the frequency band except for the synchronization grating, and the second SSB is located on the synchronization grating in the frequency band. The processing module is used to determine the second frequency domain position of the downlink control channel PDCCH based on the first information and the first frequency domain offset, wherein the first frequency domain offset is the frequency domain offset between the second SSB and the PDCCH. The transceiver module is further configured to receive the PDCCH from the wireless access network device at the second frequency domain location, wherein the first frequency domain offset is carried in the first SSB or the second SSB, and the PDCCH is the PDCCH indicated by the second SSB.

20. The apparatus according to claim 19, characterized in that, The first information includes at least one of the following: the absolute frequency domain position of the second SSB, the relative frequency domain position of the second SSB, or the frequency domain position indication information of the second SSB.

21. The apparatus according to claim 20, characterized in that, The relative frequency domain position includes: a second frequency domain offset, which is the frequency domain offset between the first SSB and the second SSB.

22. The apparatus according to claim 21, characterized in that, The second frequency domain offset includes at least one of the following: frequency domain offset at the resource block (RB) granularity, or frequency domain offset at the resource element (RE) granularity.

23. The apparatus according to any one of claims 20-22, characterized in that, The absolute frequency domain location includes: frequency point ARFCN - new radio NR value.

24. The apparatus according to any one of claims 20-22, characterized in that, The frequency domain location indication information includes at least one of the following: the Global Synchronization Number (GSCN) of the synchronization grating, or the frequency domain location index of the synchronization grating.

25. The apparatus according to any one of claims 19-22, characterized in that, The first information is also used to indicate the subcarrier spacing (SCS) of the second SSB.

26. The apparatus according to any one of claims 19-22, characterized in that, The first information is carried in at least one of the following in the first SSB: Master Information Block (MIB) or Measurement Target New Air Interface Parameters.

27. The apparatus according to claim 19, characterized in that, The PDCCH, the first SSB, and the second SSB are located in the same frequency band.

28. A communication device, characterized in that, include: Transceiver module; among which, The transceiver module is used to send first synchronization information and first information of physical broadcast channel block (SSB) to the terminal. The first information is used to indicate a first frequency domain position, which is the frequency domain position of the second SSB. The first SSB and the second SSB are located in the same frequency band. The first SSB is located in the frequency band except for the synchronization grating, and the second SSB is located on the synchronization grating in the frequency band. The transceiver module is further configured to send a first frequency domain offset to the terminal. The first frequency domain offset is the frequency domain offset between the second SSB and the downlink control channel PDCCH. The first frequency domain offset is carried in the first SSB or the second SSB. The transceiver module is further configured to send the PDCCH to the terminal, wherein the PDCCH is the PDCCH indicated by the second SSB.

29. The apparatus according to claim 28, characterized in that, The first information includes at least one of the following: the absolute frequency domain position of the second SSB, the relative frequency domain position of the second SSB, or the frequency domain position indication information of the second SSB.

30. The apparatus according to claim 29, characterized in that, The relative frequency domain position includes: a second frequency domain offset, which is the frequency domain offset between the first SSB and the second SSB.

31. The apparatus according to claim 30, characterized in that, The second frequency domain offset includes at least one of the following: frequency domain offset at the resource block (RB) granularity, or frequency domain offset at the resource element (RE) granularity.

32. The apparatus according to any one of claims 29-31, characterized in that, The absolute frequency domain location includes: frequency point ARFCN - new radio NR value.

33. The apparatus according to any one of claims 29-31, characterized in that, The frequency domain location indication information includes at least one of the following: the Global Synchronization Number (GSCN) of the synchronization grating, or the frequency domain location index of the synchronization grating.

34. The apparatus according to any one of claims 28-31, characterized in that, The first information is also used to indicate the subcarrier spacing (SCS) of the second SSB.

35. The apparatus according to any one of claims 28-31, characterized in that, The first information is carried in at least one of the following in the first SSB: Master Information Block (MIB) or Measurement Target New Air Interface Parameters.

36. The apparatus according to claim 28, characterized in that, The PDCCH, the first SSB, and the second SSB are located in the same frequency band.

37. A communication device, characterized in that, include: Processor and memory; The memory is used to store computer instructions, which, when executed by the processor, cause the communication device to perform the method as described in any one of claims 1-9, or the method as described in any one of claims 10-18.

38. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a computer program or instructions that, when executed on a computer, cause the computer to perform the method as described in any one of claims 1-18.

39. A computer program product, characterized in that, The computer program product includes: a computer program or instructions that, when run on a computer, cause the computer to perform the method as described in any one of claims 1-18.

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