CN115767689A

CN115767689A - Communication method and communication device

Info

Publication number: CN115767689A
Application number: CN202111019040.7A
Authority: CN
Inventors: 张战战; 铁晓磊; 花梦; 周涵; 黄雯雯
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-09-01
Filing date: 2021-09-01
Publication date: 2023-03-07

Abstract

The application provides a communication method and a communication device, wherein the method comprises the following steps: receiving configuration information, wherein the configuration information is used for indicating the frequency position of a first resource, the first resource is BWP or a first CORESET, and the first CORESET and CORESET #0 do not completely overlap in the frequency domain; and determining the frequency position of the first SSB according to a first frequency offset and the frequency position of the first resource, wherein the first frequency offset is the offset between the frequency position of the first SSB and the frequency position of the first resource, and the total bandwidth occupied by the first resource and the first SSB in the frequency domain is less than or equal to a preset bandwidth. According to the method and the device, the frequency position of the first SSB is determined, so that the terminal equipment can receive the first SSB at the frequency position of the first SSB and can measure by using the first SSB, the radio frequency switching frequency of the terminal equipment can be reduced, and the power consumption of the terminal equipment is reduced.

Description

Communication method and communication device

Technical Field

The present application relates to the field of communications, and more particularly, to a method of communication and a communication apparatus.

Background

A Synchronization Signal Block (SSB) can be divided into a defined cell SSB (CD-defining SSB) and a non-defined cell SSB (non-cell-defining SSB, NCD-SSB), where 1 CD-SSB corresponds to 1 cell, and the cell is identified by a unique NR Cell Global Identifier (NCGI), i.e. the CD-SSB can be used for cell access. In addition, the CD-SSB may also be used for the terminal device to perform activities such as time frequency tracking (or called time frequency synchronization), beam management (beam management), radio Resource Management (RRM) measurement, radio Link Monitoring (RLM) measurement, channel State Information (CSI) measurement, and the like. The NCD-SSB does not correspond to a cell, cannot be used for cell access, and can only be used for the above measurement activities. Currently, a New Radio (NR) is discussing a new terminal equipment (UE) type, called reduced capability (reduce) UE. It has been determined that the maximum bandwidth capability supported by a reduced capability UE in frequency range 1 (frequency range 1, fr1) specified by the third Generation Partnership project (3 rd Generation Partnership project,3 gpp) is 20MHz and the maximum bandwidth capability supported in frequency range 2 (frequency range 2, fr2) is 100MHz. Since the bandwidth supported by the reduced capability UE is smaller, the frequency range of the bandwidth part (BWP) configured for the reduced capability UE by the network device may not include the frequency location of the CD-SSB.

When the UE with reduced capability needs to perform measurement during and after accessing the cell, BWP handover or frequency handover is performed when receiving CD-SSB, which increases power consumption of the terminal device and may increase implementation complexity of the UE with reduced capability.

Currently, how to configure an SSB for measurement for a UE with reduced capability becomes an urgent problem to be solved.

Disclosure of Invention

The application provides a communication method and device, which can configure a first SSB for a terminal device at an initial access stage, reduce the frequency of Radio Frequency (RF) switching of the terminal device, and reduce the power consumption of the terminal device.

In a first aspect, a method of communication is provided, where the method may be performed by a terminal device, or may also be performed by a chip or a circuit configured in the terminal device, and this application is not limited thereto.

The method comprises the following steps: receiving configuration information indicating a frequency location of a first resource, the first resource being a bandwidth part BWP or a first control resource set CORESET, the first CORESET not completely overlapping with CORESET #0 in a frequency domain, the CORESET #0 being configured by a master information block MIB; determining a frequency position of a first Synchronization Signal Block (SSB) according to a first frequency offset and a frequency position of the first resource, wherein the first frequency offset is an offset between the frequency position of the first resource and the frequency position of the first SSB, and a total bandwidth occupied by the first SSB and the first resource on a frequency domain is less than or equal to a preset bandwidth.

According to the scheme of the application, the first SSB may be configured for the terminal device when the terminal device initially accesses, and the terminal device may determine the frequency location of the first SSB according to the first frequency offset and the frequency location of the first resource. That is to say, in the present application, by determining the frequency location of the first SSB, the terminal device is facilitated to receive the first SSB at the frequency location of the first SSB, and perform measurement using the first SSB, so that the frequency of radio frequency switching of the terminal device can be reduced, and the power consumption of the terminal device can be reduced.

On the other hand, the frequency location of the first SSB is determined by the first frequency offset and the frequency location of the first resource, which can reduce signaling overhead of the network device configuring the first SSB.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: receiving first information, where the first information is used to indicate a first frequency offset, and the first information is carried in at least one of the following signaling: system information block 1SIB1, downlink control information DCI or MIB of scheduling SIB 1.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: receiving second information, where the second information is used to indicate a presence status of the first SSB, and the second information is carried in at least one of the following signaling: SIB1, DCI or MIB scheduling SIB 1; receiving the first SSB at a frequency location of the first SSB in the case where it is determined from the second information that the first SSB exists; in a case where it is determined that the first SSB does not exist from the second information, it is determined not to receive the first SSB.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: and determining the frequency position of a second CORESET according to the frequency position of the first SSB and a second frequency offset, wherein the second CORESET is used for monitoring a physical downlink control channel PDCCH by the terminal equipment, and the second frequency offset is the offset between the center frequency of a first subcarrier of a first resource block RB of the second CORESET and the center frequency of a first subcarrier of a first RB of the first SSB.

With reference to the first aspect, in certain implementations of the first aspect, the first frequency offset is any one of: an offset between a first RB of the first SSB and a first RB of the first resource, an offset between a last RB of the first SSB and a last RB of the first resource, an offset between a center RB of the first SSB and a center RB of the first resource, an offset between a lower boundary frequency of the first SSB and a lower boundary frequency of the first resource, an offset between an upper boundary frequency of the first SSB and an upper boundary frequency of the first resource, an offset between a center frequency of the first SSB and a center frequency of the first resource, an offset between a center frequency of a first subcarrier of the first RB of the first SSB and a center frequency of a first subcarrier of the first RB of the first resource, an offset between a center frequency of a last subcarrier of the last RB of the first SSB and a center frequency of a last subcarrier of the last RB of the first resource, an offset between an upper boundary of the first SSB and a preset frequency of the first resource, a lower boundary of the first SSB and a center frequency of the first resource, wherein the first resource offset is greater than 0, and the preset offset between the first resource and the preset frequency.

With reference to the first aspect, in certain implementations of the first aspect, the first frequency offset includes a first partial offset and a second partial offset, the first partial offset is a sum of frequencies of N1 RBs, the second partial offset is a sum of frequencies of N2 subcarriers, the sum of frequencies of N2 subcarriers is less than or equal to a bandwidth of any one of N1 RBs, a subcarrier spacing of the N1 RBs is the same as a subcarrier spacing of the first resource, a subcarrier spacing of the N1 RBs is the same as or different from a subcarrier spacing of the N2 subcarriers, and N1 and N2 are integers.

With reference to the first aspect, in some implementations of the first aspect, the first partial offset is equal to an offset between a center frequency of a first subcarrier of a first RB of the corerset #0 and a center frequency of a first subcarrier of a common resource block CRB, and the second partial offset is equal to an offset between a center frequency of a first subcarrier of the first RB of the CRB and a center frequency of a first subcarrier of a first RB of a second SSB, where the second SSB includes a physical broadcast channel PBCH carrying the MIB, the CRB overlaps in the frequency domain with the first subcarrier of the first RB of the second SSB, and a subcarrier spacing of the CRB is configured by the MIB.

With reference to the first aspect, in some implementations of the first aspect, the first partial offset is indicated by DCI or SIB1, and the second partial offset is indicated by MIB, where the second partial offset is equal to an offset between a center frequency of a 1 st subcarrier of a first RB of a CRB and a center frequency of a 1 st subcarrier of a 1 st RB of a second SSB, where the second SSB includes a PBCH carrying the MIB, the CRB overlaps in the frequency domain with the first subcarrier of the 1 st RB of the second SSB, and a subcarrier spacing of the CRB is configured by the MIB.

With reference to the first aspect, in some implementations of the first aspect, the first partial offset is indicated by MIB, the second partial offset is indicated by DCI or SIB1, the first partial offset is equal to an offset between a center frequency of a 1 st subcarrier of a 1 st RB of a second CORESET and a center frequency of a 1 st subcarrier of a 1 st RB of a common resource block CRB, where the CRB overlaps in frequency domain with the first subcarrier of the 1 st RB of a second SSB, a PBCH included in the second SSB carries MIB, the second CORESET is configured by MIB, and a subcarrier spacing of the CRB is configured by MIB.

With reference to the first aspect, in some implementations of the first aspect, the first resource is an initial downlink BWP or an initial uplink BWP, the frequency range of the first resource does not include the frequency range of the second SSB, and the PBCH included in the second SSB carries the MIB.

With reference to the first aspect, in certain implementations of the first aspect, the frequency range of the first resource includes a frequency range of the first SSB.

With reference to the first aspect, in certain implementations of the first aspect, the terminal device is a reduced capability reccap terminal device.

In a second aspect, a method for communication is provided, where the method may be performed by a network device, or may also be performed by a chip or a circuit configured in the network device, and this application is not limited in this respect.

The method comprises the following steps: determining configuration information, wherein the configuration information is used for indicating a frequency position of a first resource, the frequency position of the first resource is used for a terminal device to determine a frequency position of a first synchronization signal block SSB, the first resource is a bandwidth part BWP or a first control resource set CORESET, the first CORESET is not completely overlapped with CORESET #0 in a frequency domain, the CORESET #0 is configured by a master information block MIB, and a total bandwidth occupied by the first resource and the first SSB in the frequency domain is less than or equal to a preset bandwidth; and sending the configuration information to the terminal equipment.

On the other hand, the frequency location of the first SSB is determined by the first frequency offset and the frequency location of the first resource, so that signaling overhead of configuring the first SSB by the network device can be reduced.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: sending first information to a terminal device, where the first information is used to indicate a first frequency offset, where the first frequency offset is an offset between a frequency location of a first SSB and a frequency location of a first resource, and the first information is carried in at least one of the following signaling: system information block 1SIB1, downlink control information DCI or MIB of scheduling SIB 1.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: sending second information to the terminal device, where the second information is used to indicate the existence status of the first SSB, and the second information is carried in at least one of the following signaling: SIB1, DCI scheduling SIB1, or MIB.

With reference to the second aspect, in some implementations of the second aspect, the first frequency offset is any one of: an offset between a first RB of the first SSB and a first RB of the first resource, an offset between a last RB of the first SSB and a last RB of the first resource, an offset between a center RB of the first SSB and a center RB of the first resource, an offset between a lower boundary frequency of the first SSB and a lower boundary frequency of the first resource, an offset between an upper boundary frequency of the first SSB and an upper boundary frequency of the first resource, an offset between a center frequency of the first SSB and a center frequency of the first resource, an offset between a center frequency of a first subcarrier of the first RB of the first SSB and a center frequency of a first subcarrier of the first RB of the first resource, an offset between a center frequency of a last subcarrier of the last RB of the first SSB and a center frequency of a last subcarrier of the last RB of the first resource, an offset between an upper boundary of the first SSB and a preset frequency of the first resource, a lower boundary of the first SSB and a center frequency of the first resource, wherein the first resource offset is greater than 0, and the preset offset between the first resource and the preset frequency.

With reference to the second aspect, in certain implementations of the second aspect, the first frequency offset includes a first partial offset and a second partial offset, the first partial offset is a sum of frequencies of N1 RBs, the second partial offset is a sum of frequencies of N2 subcarriers, the sum of frequencies of N2 subcarriers is less than or equal to a bandwidth of any one of the N1 RBs, a subcarrier spacing of the N1 RBs is the same as a subcarrier spacing of the first resource, a subcarrier spacing of the N1 RBs is the same as or different from a subcarrier spacing of the N2 subcarriers, and N1 and N2 are integers.

With reference to the second aspect, in certain implementations of the second aspect, the first partial offset is equal to an offset between a center frequency of a first subcarrier of the first RB of the corerset #0 and a center frequency of a first subcarrier of the common resource block CRB, and the second partial offset is equal to an offset between a center frequency of the first subcarrier of the CRB and a center frequency of the first subcarrier of the first RB of the second SSB, where the second SSB includes a physical broadcast channel PBCH carrying the MIB, the CRB overlaps in the frequency domain with the first subcarrier of the first RB of the second SSB, and a subcarrier spacing of the CRB is configured by the MIB.

With reference to the second aspect, in some implementations of the second aspect, the first partial offset is indicated by DCI or SIB1, and the second partial offset is indicated by MIB, where the second SSB includes a PBCH carrying the MIB, and the CRB overlaps in the frequency domain with the first subcarrier of the 1 st RB of the second SSB, and the subcarrier spacing of the CRB is configured by the MIB.

With reference to the second aspect, in some implementations of the second aspect, the first partial offset is indicated by MIB, the second partial offset is indicated by DCI or SIB1, and the first partial offset is equal to an offset between a center frequency of a 1 st subcarrier of a 1 st RB of a second CORESET and a center frequency of a 1 st subcarrier of a 1 st RB of a common resource block CRB, where the CRB overlaps in frequency domain with the first subcarrier of the 1 st RB of the second SSB, the PBCH included in the second SSB carries MIB, the second CORESET is configured by MIB, and a subcarrier spacing of the CRB is configured by MIB.

With reference to the second aspect, in some implementations of the second aspect, the first resource is an initial downlink BWP or an initial uplink BWP, the frequency range of the first resource does not include the frequency range of the second SSB, and the PBCH included in the second SSB carries the MIB.

With reference to the second aspect, in certain implementations of the second aspect, the frequency range of the first resource includes a frequency range of the first SSB.

With reference to the second aspect, in certain implementations of the second aspect, the end device is a reduced capability recmap end device.

In a third aspect, a communication apparatus is provided, which may be a terminal device, or may also be a chip or a circuit configured in the terminal device, and this application is not limited thereto.

The device includes: a transceiver unit, configured to receive configuration information, where the configuration information is used to indicate a frequency location of a first resource, where the first resource is a bandwidth portion WBP or a first control resource set CORESET, and the first CORESET is not completely overlapped with CORESET #0 in a frequency domain, and the CORESET #0 is configured by a master information block MIB. A processing unit, configured to determine a frequency location of a first synchronization signal block SSB according to a first frequency offset and the frequency location of the first resource, where the first frequency offset is an offset between the frequency location of the first resource and the frequency location of the first SSB, and a total bandwidth occupied by the first SSB and the first resource in a frequency domain is less than or equal to a preset bandwidth.

According to the scheme of the application, the first SSB may be configured for the terminal device when the terminal device initially accesses, and the terminal device may determine the frequency location of the first SSB according to the first frequency offset and the frequency location of the first resource. That is to say, in the present application, by determining the frequency location of the first SSB, the terminal device is facilitated to receive the first SSB at the frequency location of the first SSB, and perform measurement using the first SSB, so that the frequency of radio frequency handover of the terminal device can be reduced, and the power consumption of the terminal device can be reduced.

With reference to the third aspect, in some implementations of the third aspect, the transceiver unit is further configured to: receiving first information, where the first information is used to indicate a first frequency offset, and the first information is carried in at least one of the following signaling: system information block 1SIB1, downlink control information DCI or MIB of scheduling SIB 1.

With reference to the third aspect, in some implementations of the third aspect, the transceiver unit is further configured to: receiving second information, where the second information is used to indicate a presence status of the first SSB, and the second information is carried in at least one of the following signaling: SIB1, DCI or MIB of scheduling SIB 1; receiving the first SSB at a frequency location of the first SSB in the case where it is determined from the second information that the first SSB exists; in a case where it is determined that the first SSB does not exist from the second information, it is determined not to receive the first SSB.

With reference to the third aspect, in certain implementations of the third aspect, the processing unit is further configured to: and determining the frequency position of a second CORESET according to the frequency position of the first SSB and a second frequency offset, wherein the second CORESET is used for monitoring a physical downlink control channel PDCCH by the terminal equipment, and the second frequency offset is the offset between the center frequency of a first subcarrier of a first resource block RB of the second CORESET and the center frequency of a first subcarrier of a first RB of the first SSB.

With reference to the third aspect, in certain implementations of the third aspect, the first frequency offset is any one of: an offset between a first RB of the first SSB and a first RB of the first resource, an offset between the last RB of the first SSB and the last RB of the first resource, an offset between a center RB of the first SSB and a center RB of the first resource, an offset between a lower boundary frequency of the first SSB and a lower boundary frequency of the first resource, an offset between an upper boundary frequency of the first SSB and an upper boundary frequency of the first resource, an offset between a center frequency of the first SSB and a center frequency of the first resource, an offset between a center frequency of the first subcarrier of the first RB of the first SSB and a center frequency of the first subcarrier of the first RB of the first resource, an offset between a center frequency of the last subcarrier of the last RB of the first SSB and a center frequency of the last subcarrier of the first resource, an offset between an upper boundary of the first SSB and a preset frequency of the first resource, an offset between a lower boundary of the first SSB and a last RB of the first resource, wherein the offset between the first RB of the first SSB and the preset frequency is greater than 0, and the offset between the preset values of the first frequency of the first resource, and the preset values, and the first frequency, and the preset offset between the first frequency of the resource, and the preset values, and the first resource are greater than the preset values.

With reference to the third aspect, in certain implementations of the third aspect, the first frequency offset includes a first partial offset and a second partial offset, the first partial offset is a sum of frequencies of N1 RBs, the second partial offset is a sum of frequencies of N2 subcarriers, the sum of frequencies of N2 subcarriers is less than or equal to a bandwidth of any one of N1 RBs, a subcarrier spacing of the N1 RBs is the same as a subcarrier spacing of the first resource, a subcarrier spacing of the N1 RBs is the same as or different from a subcarrier spacing of the N2 subcarriers, and N1 and N2 are integers.

With reference to the third aspect, in certain implementations of the third aspect, the first partial offset is equal to an offset between a center frequency of a first subcarrier of a first RB of the corerset #0 and a center frequency of a first subcarrier of a common resource block CRB, and the second partial offset is equal to an offset between a center frequency of a first subcarrier of the CRB and a center frequency of a first subcarrier of a first RB of a second SSB, where the second SSB includes a physical broadcast channel PBCH carrying the MIB, the CRB overlaps the first subcarrier of the first RB of the second SSB in a frequency domain, and a subcarrier spacing of the CRB is configured by the MIB.

With reference to the third aspect, in certain implementations of the third aspect, the first partial offset is indicated by DCI or SIB1, and the second partial offset is indicated by MIB, where the second partial offset is equal to an offset between a center frequency of a 1 st subcarrier of a first RB of a CRB and a center frequency of a 1 st subcarrier of a 1 st RB of a second SSB, where the second SSB includes a PBCH carrying the MIB, the CRB overlaps with the first subcarrier of the 1 st RB of the second SSB in a frequency domain, and a subcarrier spacing of the CRB is configured by the MIB.

With reference to the third aspect, in some implementations of the third aspect, the first partial offset is indicated by MIB, the second partial offset is indicated by DCI or SIB1, the first partial offset is equal to an offset between a center frequency of a 1 st subcarrier of a 1 st RB of a second CORESET and a center frequency of a 1 st subcarrier of a 1 st RB of a common resource block CRB, where the CRB overlaps in frequency domain with the first subcarrier of the 1 st RB of the second SSB, a PBCH included in the second SSB carries MIB, the second CORESET is configured by MIB, and a subcarrier spacing of the CRB is configured by MIB.

With reference to the third aspect, in some implementations of the third aspect, the first resource is an initial downlink BWP or an initial uplink BWP, the frequency range of the first resource does not include the frequency range of the second SSB, and the PBCH included in the second SSB carries the MIB.

With reference to the third aspect, in certain implementations of the third aspect, the frequency range of the first resource includes a frequency range of the first SSB.

With reference to the third aspect, in certain implementations of the third aspect, the terminal device is a reduced capability red map terminal device.

In a fourth aspect, a communication apparatus is provided, where the apparatus may be a network device, or may also be a chip or a circuit configured in the network device, and this is not limited in this application.

The device includes: the processing unit is configured to determine configuration information, where the configuration information is used to indicate a frequency location of a first resource, the frequency location of the first resource is used for a terminal device to determine a frequency location of a first synchronization signal block SSB, the first resource is a bandwidth portion BWP or a first control resource set CORESET, the first CORESET is not completely overlapped with CORESET #0 in a frequency domain, the CORESET #0 is configured by a master information block MIB, and a total bandwidth occupied by the first resource and the first SSB in the frequency domain is less than or equal to a preset bandwidth. And the transceiving unit is used for sending the configuration information to the terminal equipment.

With reference to the fourth aspect, in some implementations of the fourth aspect, the transceiver unit is further configured to: sending first information to a terminal device, where the first information is used to indicate a first frequency offset, where the first frequency offset is an offset between a frequency location of a first SSB and a frequency location of a first resource, and the first information is carried in at least one of the following signaling: system information block 1SIB1, downlink control information DCI or MIB of scheduling SIB 1.

With reference to the fourth aspect, in some implementations of the fourth aspect, the transceiver unit is further configured to: sending second information to the terminal device, where the second information is used to indicate the existence status of the first SSB, and the second information is carried in at least one of the following signaling: SIB1, DCI scheduling SIB1, or MIB.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first frequency offset is any one of: an offset between a first RB of the first SSB and a first RB of the first resource, an offset between a last RB of the first SSB and a last RB of the first resource, an offset between a center RB of the first SSB and a center RB of the first resource, an offset between a lower boundary frequency of the first SSB and a lower boundary frequency of the first resource, an offset between an upper boundary frequency of the first SSB and an upper boundary frequency of the first resource, an offset between a center frequency of the first SSB and a center frequency of the first resource, an offset between a center frequency of a first subcarrier of the first RB of the first SSB and a center frequency of a first subcarrier of the first RB of the first resource, an offset between a center frequency of a last subcarrier of the last RB of the first SSB and a center frequency of a last subcarrier of the last RB of the first resource, an offset between an upper boundary of the first SSB and a preset frequency of the first resource, a lower boundary of the first SSB and a center frequency of the first resource, wherein the first resource offset is greater than 0, and the preset offset between the first resource and the preset frequency.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the first frequency offset includes a first partial offset and a second partial offset, the first partial offset is a sum of frequencies of N1 RBs, the second partial offset is a sum of frequencies of N2 subcarriers, the sum of frequencies of N2 subcarriers is less than or equal to a bandwidth of any one of the N1 RBs, a subcarrier spacing of the N1 RBs is the same as a subcarrier spacing of the first resource, a subcarrier spacing of the N1 RBs is the same as or different from a subcarrier spacing of the N2 subcarriers, and N1 and N2 are integers.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first partial offset is equal to an offset between a center frequency of a first subcarrier of a first RB of the corerset #0 and a center frequency of a first subcarrier of a common resource block CRB, and the second partial offset is equal to an offset between a center frequency of the first subcarrier of the first RB of the CRB and a center frequency of a first subcarrier of a first RB of a second SSB, where the second SSB includes a physical broadcast channel PBCH carrying the MIB, the CRB overlaps in the frequency domain with the first subcarrier of the first RB of the second SSB, and a subcarrier spacing of the CRB is configured by the MIB.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first partial offset is indicated by DCI or SIB1, and the second partial offset is indicated by MIB, where the second SSB includes a PBCH carrying the MIB, and the second CRB overlaps in the frequency domain with the first subcarrier of the 1 st RB of the second SSB, and the subcarrier spacing of the CRB is configured by the MIB.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first partial offset is indicated by MIB, the second partial offset is indicated by DCI or SIB1, and the first partial offset is equal to an offset between a center frequency of a 1 st subcarrier of a 1 st RB of a second CORESET and a center frequency of a 1 st subcarrier of a 1 st RB of a common resource block CRB, where the CRB overlaps in frequency domain with the first subcarrier of the 1 st RB of the second SSB, the PBCH included in the second SSB carries MIB, the second CORESET is configured by MIB, and a subcarrier spacing of the CRB is configured by MIB.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first resource is an initial downlink BWP or an initial uplink BWP, the frequency range of the first resource does not include the frequency range of the second SSB, and the PBCH included in the second SSB carries the MIB.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the frequency range of the first resource includes a frequency range of the first SSB.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the end device is a reduced capability recmap end device.

In a fifth aspect, a communication apparatus is provided, including: at least one processor coupled with at least one memory, the at least one processor configured to execute computer programs or instructions stored in the at least one memory to cause the communication apparatus to perform the method of any of the first to second aspects or any possible implementation manner of the first to second aspects.

A sixth aspect provides a computer-readable storage medium having stored thereon a computer program or instructions which, when run on a computer, cause the computer to perform the method of any of the first to second aspects or any of the possible implementations of the first to second aspects described above.

In a seventh aspect, a chip system is provided, including: a processor for executing a computer program or instructions in a memory to implement the method of any one of the first to second aspects described above or any one of the possible implementations of the first to second aspects.

In an eighth aspect, there is provided a computer program product comprising a computer program or instructions which, when executed, causes the method in any one of the first to second aspects or any one of the possible implementations of the first to second aspects to be performed.

Drawings

Fig. 1 is a schematic diagram of a communication system to which an embodiment of the present application is applicable.

Fig. 2 is a schematic diagram of content included in an SSB symbol provided in an embodiment of the present application.

Fig. 3 is a schematic flow chart of a method of communication according to an embodiment of the present application.

Fig. 4 is a schematic diagram of frequency offset between the corerset #0 and the second SSB provided in the present application.

Fig. 5 is a further schematic flow chart of a method of communication provided by an embodiment of the present application.

Fig. 6 is a schematic block diagram of a communication device according to an embodiment of the present application.

Fig. 7 is a further schematic block diagram of a communication apparatus according to an embodiment of the present application.

Fig. 8 is a further schematic block diagram of a communication device according to an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD) system, a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication system, a fifth generation (5 th generation,5 g) mobile communication system, or a New Radio (NR). The 5G mobile communication system may be a non-independent Network (NSA) or an independent network (SA), among others.

The technical scheme provided by the application can also be applied to Machine Type Communication (MTC), long term evolution-machine (LTE-M) communication between machines, device-to-device (D2D) network, machine-to-machine (M2M) network, internet of things (IoT) network, or other networks. The IoT network may comprise, for example, a car networking network. The communication modes in the car networking system are collectively referred to as car-to-other devices (V2X, X may represent anything), for example, the V2X may include: vehicle to vehicle (V2V) communication, vehicle to infrastructure (V2I) communication, vehicle to pedestrian (V2P) communication, or vehicle to network (V2N) communication, and the like.

The technical scheme provided by the application can also be applied to future communication systems, such as a sixth generation (6G) mobile communication system and the like. This is not a limitation of the present application.

In an embodiment of the present application, a terminal device may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment.

The terminal device may be a device providing voice/data connectivity to a user, e.g. a handheld device, a vehicle mounted device, etc. with wireless connection capability. Currently, some examples of terminals may be: mobile phone (mobile phone), tablet computer (pad), computer with wireless transceiving function (such as notebook computer, palm computer, etc.), mobile Internet Device (MID), virtual Reality (VR) device, augmented Reality (AR) device, wireless terminal in industrial control (industrial control), wireless terminal in self driving (self driving), wireless terminal in remote medical (remote medical), wireless terminal in smart grid (smart grid), wireless terminal in transportation safety (transportation safety), wireless terminal in smart city (smart city), wireless terminal in smart home (smart home) (for example, home appliances such as televisions, smart boxes, game consoles), cellular phones, cordless phones, session Initiation Protocol (SIP) phones, wireless Local Loop (WLL) stations, personal Digital Assistants (PDAs), handheld devices having wireless communication capabilities, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in a 5G network or terminal devices in a Public Land Mobile Network (PLMN) for future evolution, and the like.

The wearable device can also be called a wearable intelligent device, and is a general name of devices which are intelligently designed and can be worn by applying a wearable technology to daily wearing, such as glasses, gloves, watches, clothes, shoes and the like. The wearable device may be worn directly on the body or may be a portable device integrated into the user's clothing or accessory. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets for physical sign monitoring, smart jewelry and the like.

Furthermore, the terminal device may also be a terminal device in an Internet of things (IoT) system. The IoT is an important component of future information technology development, and is mainly technically characterized in that articles are connected with a network through a communication technology, so that an intelligent network with man-machine interconnection and object interconnection is realized. The IoT technology can achieve massive connection, deep coverage, and power saving of the terminal through, for example, narrowband (NB) technology.

In this embodiment, the terminal device may also be a vehicle or a whole vehicle, and may implement communication through a vehicle networking, or may also be a component located in the vehicle (for example, placed in the vehicle or installed in the vehicle), that is, an on-board unit (OBU), an on-board module, or an on-board unit (OBU).

In addition, the terminal equipment can also comprise sensors such as an intelligent printer, a train detector, a gas station and the like, and the main functions of the terminal equipment comprise data collection (part of the terminal equipment), control information and downlink data receiving of the network equipment, electromagnetic wave sending and uplink data transmission to the network equipment.

In the embodiment of the present application, the network device may be any device having a wireless transceiving function. Such devices include, but are not limited to: an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B or home Node B, HNB), a Base Band Unit (BBU), an Access Point (AP) in a wireless fidelity (WiFi) system, a wireless relay Node, a wireless backhaul Node, a Transmission Point (TP), a transmission point (TRP) in a wireless fidelity (WiFi) system, and the like, and may also be a 5G system, such as an NR, a gbb in a system, or a transmission point (TRP or TP), and one or a group of base stations in a 5G system may include multiple antennas, a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., a home Node B, or home Node B), a Base Band Unit (BBU), and the like, and may also be a 5G system, and a radio network panel, a radio network controller (NB), a base station controller (BBU), a base station, a radio network controller (BSC), and a base station controller (BBU) in a system, a transceiver station, a transceiver panel, or a transceiver panel.

In some deployments, the gNB may include a Centralized Unit (CU) and a DU. The gNB may further include an Active Antenna Unit (AAU). The CU implements part of the function of the gNB, and the DU implements part of the function of the gNB. For example, the CU is responsible for processing non-real-time protocols and services, and implementing functions of a Radio Resource Control (RRC) layer and a Packet Data Convergence Protocol (PDCP) layer. The DU is responsible for processing a physical layer protocol and a real-time service, and implements functions of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a Physical (PHY) layer. The AAU implements part of the physical layer processing functions, radio frequency processing, and active antenna related functions. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling, such as the RRC layer signaling, may also be considered to be transmitted by the DU or transmitted by the DU and the CU under this architecture. It is to be understood that the network device may be a device comprising one or more of a CU node, a DU node, an AAU node. In addition, the CU may be divided into network devices in an access network (RAN), or may be divided into network devices in a Core Network (CN), which is not limited in this application.

The network device provides a service for a cell, and a terminal device communicates with the cell through a transmission resource (e.g., a frequency domain resource, or a spectrum resource) allocated by the network device, where the cell may belong to a macro base station (e.g., a macro eNB or a macro gNB), or may belong to a base station corresponding to a small cell (small cell), where the small cell may include: urban cell (metro cell), micro cell (microcell), pico cell (pico cell), femto cell (femto cell), etc., and these small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-rate data transmission service.

Fig. 1 is a schematic diagram of a communication system 100 suitable for use in the communication method of the embodiment of the present application. As shown in fig. 1, the communication system 100 may include at least one network device, such as the network device 110 shown in fig. 1; the communication system 100 may also include at least one terminal device, such as the terminal device 120 shown in fig. 1. Network device 110 and terminal device 120 may communicate via a wireless link. Each communication device, such as network device 110 or terminal device 120, may be configured with multiple antennas. For each communication device in the communication system, the configured plurality of antennas may include at least one transmit antenna for transmitting signals and at least one receive antenna for receiving signals. Therefore, communication between the communication devices in the communication system, and between the network device 110 and the terminal device 120, may be performed by using the multi-antenna technology.

It should be understood that fig. 1 is a simplified schematic diagram of an example for ease of understanding only, and that other network devices or other terminal devices may also be included in the communication system, which are not shown in fig. 1.

It should also be understood that fig. 1 is only an application scenario of the embodiment of the present application, and the method provided by the embodiment of the present application is not limited to communication between a network device and a terminal device, and may also be applied to communication between a terminal device and a terminal device, and the like. The application does not limit the application scenario of the method. In the embodiments shown below, the method provided by the embodiments of the present application is described in detail by taking the interaction between the network device and the terminal device as an example only for convenience of understanding and description.

For the convenience of understanding the embodiments of the present application, the terms referred to in the embodiments of the present application will be briefly described below.

1. Synchronization Signal Block (SSB)

The SSB may also be referred to as a Physical Broadcast Channel (PBCH) block (block), and is composed of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a broadcast channel (PBCH), and occupies 4 Orthogonal Frequency Division Multiplexing (OFDM) symbols in a time domain.

Fig. 2 is a schematic diagram of content included in an SSB symbol provided in an embodiment of the present application. The SSB has a bandwidth of 20 Resource Blocks (RBs) and includes 240 subcarriers (subcarriers). The first symbol carries the PSS, which includes 127 subcarriers, that is, the length of the PSS sequence is 127, and the PSS only occupies the middle part of the SSB frequency domain, and no other data or control information is sent on both sides; the second and fourth symbols are broadcast channels (PBCH), which mainly carry system information; the third symbol carries PBCH and SSS simultaneously, where the SSS sequence length is 127 as with PSS, and both occupy 127 Resource Elements (REs) in the middle of the SSB frequency domain. Both sides of the SSS transmit the PBCH using 48 REs, respectively, with 8 and 9 RE intervals between SSS and PBCH.

The frequency domain bandwidth size of SSB at different subcarrier spacing (SCS) is shown in table 1.

TABLE 1

SSB SCS(KHz)	SSB frequency domain bandwidth (20 RB) (MHz)
		15KHz	3.6
30KHz	7.2
		120KHz	28.8
240KHz	57.6

SSBs can be divided into defined cell SSBs (CD-SSBs) and non-defined cell SSBs (NCD-SSBs). If an SSB is associated with a Remaining Minimum System Information (RMSI), such an SSB is called a CD-SSB. A CD-SSB would correspond to 1 cell, which is identified by a unique NR Cell Global Identifier (NCGI).

The PBCH carries Master Information Block (MIB) information, where the MIB information indicates whether a control resource set (CORESET) #0 exists, and if the MIB indicates that CORESET #0 exists, the SSB is a CD-SSB. The terminal device may determine, through a parameter (PDCCH-ConfigSIB 1) in the MIB information, a CORESET #0 and a Type0-physical downlink control channel common search space (Type 0-physical downlink control channel common search space, type0-PDCCH CSS), where the CORESET #0 is a CORESET associated with the Type0-PDCCH CSS, and the terminal device monitors, on the CORESET #0, a PDCCH of a scheduling system information block 1 (system information block 1, sibb 1, which is also referred to as Remaining Minimum System Information (RMSI)), and specifically, the PDCCH is used for scheduling a Physical Downlink Shared Channel (PDSCH) carrying the SIB 1. Here, type0-PDCCH CSS is also referred to as search space 0, search space set 0, or search space set with ID 0. If the MIB indicates that CORESET #0 is not present, this indicates that the SSB is NCD-SSB, i.e., NCD-SSB is not associated with SIB1/RMSI.

One of the roles of the SSB is cell access, that is, a terminal device may receive MIB information through the SSB, thereby acquiring SIB1 associated with the SSB to access a cell. Since the SSB includes PSS, SSS, PBCH, and DMRS, the SSB may also be used for the terminal device to perform time-frequency tracking (or called time-frequency synchronization), beam management (beam management), radio Resource Management (RRM) measurement, radio Link Monitoring (RLM) measurement, channel State Information (CSI) measurement, and the like.

2. Control resource set (CORESET) and search space (search space)

The control resource set is a resource set used for transmitting downlink control information, and may also be referred to as a control resource region or a physical downlink control channel resource set.

The method comprises the steps that in NR, the system bandwidth is large (frequency range 1 (FR1) can reach 100MHz at most, frequency range 2 (frequency range 2, FR2) can reach 400MHz at most, NR encapsulates information such as frequency bands occupied by PDCCH in a frequency domain and the number of OFDM symbols occupied in a time domain in CORESET, and encapsulates information such as the initial OFDM symbol number index of the PDCCH and a PDCCH monitoring period in a search space (search space).

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

3. Synchronous grid (synch raster)

The frequency location information for the terminal device to scan for SSBs may be defined by a synchronization grid, which represents a series of frequency points available for transmitting SSBs. When a base station is deployed, cells need to be established, each cell needs to have a specific SSB, and the frequency position corresponding to each SSB is the synchronous grid position. The introduction of the synchronous grid concept mainly enables the terminal equipment to perform corresponding searching at a specific frequency point position in the process of cell searching, and avoids overlong access delay and energy loss caused by the uncertainty of blind searching. 3GPP defines certain frequencies as synchronization grids where CD-SSB is located, while NCD-SSB may or may not be located. The synchronization grid is an absolute frequency location. The frequency location of the synchronization grid corresponds to the frequency location of the 121 th subcarrier among the 240 subcarriers included in the SSB, if the SSB exists.

The UE should select a cell first at initial access. The UE searches for the SSB on the synchronization grid, and if the CD-SSB is found on the synchronization grid, the UE may select a cell corresponding to the CD-SSB as an initial access cell. In addition, the UE may receive the RMSI of the CD-SSB association (i.e., SIB 1).

4. Bandwidth part (BWP)

BWP is a fractional bandwidth within the carrier bandwidth. A BWP may be a segment of contiguous frequency resources on a carrier. A network device may configure one or more BWPs for a terminal, and the bandwidth of different BWPs may be different. The network device may also configure different terminal devices with BWPs of different bandwidth sizes. The network device may send activation signaling to activate one of the plurality of configured BWPs. When a BWP is configured and activated, the BWP is called an active BWP (active BWP), and the active BWP includes an active Downlink (DL) BWP and an active Uplink (UL) BWP. The terminal device transmits data and control information in the active UL BWP and receives data and control information in the active DL BWP. In one possible implementation, 1 terminal device supports only 1 active uplink BWP and/or 1 downlink BWP at the same time in one cell. The BWP to which the terminal device is allocated at the initial access is called initial BWP (initial BWP). The identification of the initial BWP takes the value 0.

Currently, NR is discussing a new UE type, called reduced capability (RedCap) UE. As examples, the reduced capability UE may be wearable devices (radios), industrial wireless sensors (industrial wireless sensors), and time frequency monitoring (Video surveillance) devices. In the present application, besides the reduced capability UE, other NR UEs may be referred to as normal (normal) UEs or legacy (legacy) UEs, such as enhanced mobile broadband (eMBB) UEs, ultra-reliable low-latency communication (URLLC) UEs, and so on.

In NR, it has been determined that the maximum bandwidth capability supported by reduced capability UEs at FR1 is 20MHz and the maximum bandwidth capability supported at FR2 is 100MHz. The frequency range of BWPs configured by the network device for the reduced capability UE may not include the frequency location of the CD-SSB due to the smaller bandwidth supported by the reduced capability UE. For example, when there are many UEs, in order to balance data load (data offloading), expand system capacity, and during the initial access phase, the network device may configure 2 initial DL BWPs, one for normal UEs and one for reduced capability UEs, and the frequency domain range of the initial downlink BWP for a reccap UE may not include the frequency location of the CD-SSB. After initial access, e.g., in RRC connected state, the network device may also configure BWPs for reduced capability UEs whose frequency range does not include CD-SSBs.

As an example, in a Time Division Duplex (TDD) system, because the bandwidth capability of the eMBB UE is high, for example, FR1 supports a radio frequency bandwidth capability of 100MHz. Therefore, the bandwidth of the initial uplink BWP configured by the network device for the eMBB UE may exceed the maximum bandwidth capability supported by the reccap UE. In order to support uplink transmission of a red map UE, data of the red map UE is within the bandwidth supported by the red map UE, a new initial uplink BWP may be configured for the red map UE, and the bandwidth of the new initial uplink BWP should not exceed the maximum bandwidth capability supported by the red map UE. In TDD systems, an upstream BWP and a downstream BWP form a BWP pair (BWP pair), which have the same ID and the same center frequency. For example, the initial upstream BWP and the initial downstream BWP are a BWP pair, and should have the same center frequency. However, the center frequency of the initial uplink BWP newly introduced to the redmap UE may not be aligned with the center frequency of the initial downlink BWP configured for the eMBB UE, and therefore, in addition to the reason of expanding the system capacity, in order to keep the center frequency point alignment of the initial uplink BWP of the redmap UE, an initial downlink BWP may be newly introduced to the redmap UE, which is referred to as: redCap-initial DL BWP. Obviously, in order to keep the center frequency points of the initial downlink BWP of the redmap UE aligned, the frequency domain range of the initial downlink BWP configured for the redmap UE may not include the frequency range of the CD-SSB.

If the frequency range of the BWP configured for the UE with reduced capability does not include the frequency location of the CD-SSB, the UE may still need to receive the CD-SSB for time-frequency tracking, beam management, RRM measurement, RLM measurement, and/or CSI measurement when the BWP is active BWP. When the UE with reduced capability receives the CD-SSB, the BWP handover or frequency handover is performed, i.e. the handover is to the BWP or frequency in the frequency range including the CD-SSB, and the frequent frequency handover of the UE will also increase the power consumption of the UE. Furthermore, the UE cannot transmit data on the active BWP during the frequency switching, which may cause data interruption.

In order to reduce frequent frequency switching of the UE with reduced capability and reduce power consumption of the UE, it is necessary to configure SSBs for the UE with reduced capability besides CD-SSBs, for example, to configure SSBs inside the initial downlink BWP configured for the reccap UE. The SSB may be referred to as a first SSB, and the first SSB may be used for the reduced capability UE to perform measurements including, but not limited to, time-frequency tracking, beam management, RRM measurements, RLM measurements, CSI measurements, and/or the like. For the sake of convenience of distinction, the CD-SSB is referred to as a second SSB, which may also be understood as an SSB searched in the initial network search of the terminal device.

Currently, for normal UEs, the SSB can only be configured by RRC signaling after entering the RRC connected state. However, for a reduced capability UE or a normal UE, it may need to use the SSB for measurement in the initial access state. In addition, the RRC signaling overhead of the RRC connected state for configuring the SSB is large, for example, the frequency of the SSB may be configured by the cell "associated frequency SSB", and this cell needs 22 bits. It can be seen that the cell "associated resource frequency SSB" requires a large signaling overhead, and is not suitable for configuring an SSB for a UE in the initial access phase, because the available signaling resources are limited in the initial access phase. For example, the initial access phase may carry the configuration signaling of the SSB through SIB1, which may increase the signaling overhead (load overhead) of SIB 1. The SIB1 signaling is broadcast signaling and carries the minimum system message, and if the SIB1 signaling overhead is too large, the system resource utilization efficiency may be reduced. Therefore, how to configure the SSB for measurement for the UE in the initial access phase becomes an urgent problem to be solved.

In view of this, the present application provides a communication method and apparatus, which can configure an SSB for measurement for a terminal device at an initial access stage, reduce a frequency of radio frequency handover of the terminal device, and reduce power consumption of the terminal device.

A method and an apparatus for communication according to embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Fig. 3 is a schematic block diagram of a method of communication according to an embodiment of the present application. The method 300 shown in fig. 3 may be performed by the terminal device and the network device shown in fig. 1.

S310, the network device determines configuration information, where the configuration information is used to indicate a frequency location of a first resource, where the first resource is BWP or a first core set, where the first core set and core set #0 do not completely overlap in a frequency domain, and core set #0 is configured by the MIB.

The network device may indicate the frequency location of the first resource through configuration information, which is carried in SIB1 in an implementation manner. That is to say, after the terminal device searches for the CD-SSB, it parses the PBCH of the CD-SSB, obtains MIB information, obtains the frequency location and bandwidth size of CORESET #0 according to the MIB information, then monitors the PDCCH that schedules SIB1 on CORESET #0, and further receives the PDSCH that carries SIB1, and obtains SIB1, where SIB1 includes configuration information, and the configuration information is used to indicate the frequency location of the first resource.

Optionally, the configuration information may also be carried in other signaling. For example, the configuration information may be carried in other SIBs besides SIB1, for example, system information blocks such as SIB2, SIB3 to SIBx, or newly introduced SIBs for the reccap UE, where x is a positive integer greater than or equal to 2.

Optionally, the configuration information may also be carried in Downlink Control Information (DCI), for example, the configuration information is carried in DCI for scheduling SIB 1.

Wherein, CORESET #0 may be configured by SIB1 in addition to MIB. The CORESET #0 configured by the SIB1 and the CORESET #0 configured by the MIB are the same resource, that is, the information configuring the CORESET #0 in the SIB1 is the same as the information configuring the CORESET #0 in the MIB, and the meaning is also the same.

Optionally, the configuration information may also be understood as being used to indicate the first resource, where indicating the first resource includes: indicating a frequency location of the first resource.

In one implementation, the frequency position of the first resource may be understood as a frequency range occupied by the first resource in the frequency domain, and includes information such as a starting position of the first resource in the frequency domain, a bandwidth of the first resource, and the like.

In one implementation, the frequency location of the first resource may be understood as a frequency value of a certain characteristic location of the first resource in a frequency domain, for example, the characteristic location may be a center frequency of a first RB of the first resource, a center frequency of a last RB of the first resource, a center frequency of a center RB of the first resource, a lower boundary of the first resource, an upper boundary of the first resource, a center frequency of the first resource, a center frequency of a first subcarrier of the first RB of the first resource, or a center frequency of a last subcarrier of the last RB of the first resource. The center frequency of one subcarrier is the center frequency of the RE occupied by the subcarrier in the frequency domain, that is, the center frequency of the first subcarrier of one RB may also be referred to as the center frequency of the first RE of one RB.

The first resource may be understood as a resource for the terminal device, and optionally, the first resource may be a BWP, that is, the first resource may be a certain BWP configured by the network device for the terminal device, for example, an initial downlink BWP or an initial uplink BWP, or any one of multiple other BWPs configured by the network device for the terminal device.

Alternatively, the first resource may be a first CORESET, and the first CORESET and the CORESET #0 do not completely overlap in the frequency domain, for example, the first CORESET and the CORESET #0 do not overlap at all or partially overlap in the frequency domain. Or, it can also be said that the first CORESET is different from CORESET #0, that is, the first CORESET is a control resource set configured by the network device for the terminal device, and the first control resource set is used for the terminal device to monitor the PDCCH and is not equal to CORESET #0. Where CORESET #0 is a generic term referring to the set of control resources indicated by MIB carried in PBCH of CD-SSB in current protocol, configuration signaling of CORESET #0 may also be carried in SIB 1. Specifically, the pdcch-ConfigSIB1 field in the MIB includes 8 bits (bit), where an information element (information element) controlResourceSetZero occupies 4 bits, a value of the bit corresponds to an index in a table predefined by the 3GPP protocol, and a row of the index includes the number of resource blocks RB and the number of symbols corresponding to CORESET #0. For example, the predefined table may be table 2, where the first column in table 2 is an index value, and the 3rd column and the 4 th column respectively represent the number of RBs and the number of symbols corresponding to CORESET #0. Furthermore, cell controlled resource esetzro may also be present in SIB 1.

TABLE 2

S320, the network device sends the configuration information to the terminal device, and accordingly, the terminal device receives the configuration information.

S330, the terminal device determines the frequency position of the first synchronization signal block SSB according to a first frequency offset and the frequency position of the first resource, wherein the first frequency offset is an offset between the frequency position of the first SSB and the frequency position of the first resource, and the total bandwidth occupied by the first resource and the first SSB on the frequency domain is less than or equal to a preset bandwidth.

That is, the terminal device may obtain the frequency location of the first resource configured by the network device based on the configuration information, and determine the frequency location of the first synchronization signal block SSB according to the first frequency offset and the frequency location of the first resource. The first frequency offset may be preset in the terminal device, may also be predefined by a 3GPP protocol, or may also be indicated to the terminal device by the network device.

In one implementation, the total bandwidth occupied by the first resource and the first SSB in the frequency domain is less than or equal to a preset bandwidth. The preset bandwidth value may be a maximum bandwidth supported by the terminal device. For example, for a RedCap terminal device, the maximum bandwidth capability supported in FR1 is 20MHz, in which case the preset bandwidth may be a value less than or equal to 20 MHz. As another example, the maximum bandwidth capability supported by the RedCap terminal device in FR2 is 100MHz, in which case the preset bandwidth may be a value less than or equal to 100MHz.

In one implementation, the terminal device is a RedCap UE, the network device separately configures an initial downlink BWP for the RedCap UE in addition to an initial downlink BWP configured for a normal UE, and also configures a control resource set, i.e., a first CORESET, for the RedCap UE in a frequency domain of the initial downlink BWP separately configured for the RedCap UE. In this application, the first resource is a first CORESET, and the first SSB satisfies the following conditions: the total bandwidth of the first SSB and the first CORESET is less than or equal to a preset bandwidth. Optionally, since the initial downlink BWP separately configured for the red beacon UE includes the frequency range of the first core set, the condition satisfied by the first SSB may also be: the total bandwidth occupied by the first SSB and the initial downlink BWP configured for the RedCap UE independently is less than or equal to a preset bandwidth.

It should be understood that the first SSB is different from the CD-SSB searched for when the terminal device initially accesses, and in this application, the CD-SSB searched for when the terminal device initially accesses is referred to as a second SSB. Alternatively, the first SBB may also be referred to as an additional SSB (add-SSB), a separate SSB (separate SSB), a dedicated SSB (dedicated SSB), a measured SSB, etc., and the present application is not limited thereto.

Optionally, before the recap UE accesses the network, the first SSB does not exist, the network device newly configures the first SSB for the recap UE when the recap UE accesses, and after the recap UE accesses, the network device starts to send the first SSB. Or, before the reccap UE accesses the network, there is a first SSB, for example, the network device periodically sends an SSB (e.g., a CD-SSB or an NCD-SSB) for serving other terminal devices (e.g., normal UEs), which is denoted as SSB # a for convenience of description, and when the network device determines that the SSB needs to be configured for the reccap UE, it determines that the SSB # a may also be used for the reccap UE, and at this time, the SSB # a is the first SSB, and the network device may notify the reccap UE of the SSB # a when the reccap UE accesses the network.

In an implementation manner, the first resource is an initial downlink BWP or an initial uplink BWP, the frequency range of the first resource does not include the frequency range of the second SSB, the PBCH included in the second SSB carries the MIB information, and the MIB information may be used to configure the aforementioned CORESET #0. That is, the first resource is an initial uplink BWP (iuBWP) or an initial downlink BWP (idBWP) configured by the network device to the terminal device, and the first resource does not include the frequency location of the CD-SSB in the frequency domain.

For example, the network device configures 2 initial downlink BWPs in SIB1, one for the normal UE and one for the reduced capability UE, where the frequency range of the initial downlink BWP for the normal UE includes the second SSB (i.e., CD-SSB) and CORESET #0, and the frequency range of the initial downlink BWP for the reduced capability UE does not include the second SSB and/or CORESET #0. At this time, the first resource refers to the initial downlink BWP configured for the UE with reduced capability, that is, the initial downlink BWP without the second SSB. The initial downlink BWP for the reduced capability UE may also be understood as an individually configured, or specifically configured, initial downlink BWP for the recmap UE.

Similarly, the first resource may be an initial uplink BWP that the network device individually configures for a recmap UE.

In one implementation, the first resource is a first CORESET. The first core set is the core set configured for the red map UE.

For example, the network device configures 2 initial downlink BWPs in SIB1, one for the normal UE and one for the reduced capability UE, where the frequency range of the initial downlink BWP for the normal UE includes the second SSB (i.e., CD-SSB) and CORESET #0, and the frequency range of the initial downlink BWP for the reduced capability UE does not include the second SSB and/or CORESET #0. In the initial downlink BWP of the red map UE, the network device may configure a core set, that is, the first core set, where the first resource refers to the first core set.

In one implementation, the frequency range of the first resource includes a frequency range of the first SSB. That is, the network device configures the terminal device with the first resource, and the frequency range of the first resource includes the frequency range of the first SSB configured by the network device to the terminal device. Alternatively, it can also be understood that the frequency range of the first SSB is within the frequency range of the first resource. Therefore, when the terminal device transmits data in the first resource, the terminal device can receive the first SSB at the frequency position of the first SSB in the first resource for measurement, and the terminal device can receive the first SSB without radio frequency switching, so that the power consumption of the terminal device can be reduced.

Optionally, the frequency range of the first resource does not completely include the frequency range of the first SSB, but the total frequency range occupied by the first resource and the first SSB is less than or equal to the preset bandwidth. As described above, the preset bandwidth may be less than or equal to the maximum bandwidth capability supported by the terminal device, so that the terminal device can transmit data in the first resource and receive the first SSB at the frequency location of the first SSB without performing radio frequency switching, and power consumption of the terminal device can be reduced.

Optionally, the first SSB may be a CD-SSB or an NCD-SSB. The first SSB may be used for the terminal device to perform measurement during and after cell access.

Optionally, the first SSB may be located on a synchronization grid of the SSB, or may not be located on the synchronization grid of the SSB, which is not limited in this application.

In one implementation, the method 300 further includes: s340, the network device sends first information to the terminal device, and accordingly, the terminal device receives the first information, where the first information is used to indicate a first frequency offset. I.e. the first frequency offset is indicated to the terminal device by the network device. The first information may be carried in at least one signaling of SIB1, downlink control information DCI of scheduling SIB1, or MIB. The first frequency offset and the first information will be described in detail below.

In one implementation, the first frequency offset is any one of: an offset between a first RB of the first SSB and a first RB of the first resource, an offset between a last RB of the first SSB and a last RB of the first resource, an offset between a center RB of the first SSB and a center RB of the first resource, an offset between a lower boundary frequency of the first SSB and a lower boundary frequency of the first resource, an offset between an upper boundary frequency of the first SSB and an upper boundary frequency of the first resource, an offset between a center frequency of the first SSB and a center frequency of the first resource, an offset between a center frequency of a first subcarrier of the first RB of the first SSB and a center frequency of a first subcarrier of the first RB of the first resource, an offset between a center frequency of a last subcarrier of the last RB of the first SSB and a center frequency of a last subcarrier of the last RB of the first resource. That is, the same reference frequency location may be selected on the first SSB and the first resource, and the reference frequency location may be a location of any one of the first RB, the last RB, the center RB, the lower boundary, the upper boundary, the center frequency of the first subcarrier of the first RB, and the center frequency of the last subcarrier of the last RB in the frequency domain. The lower boundary can also be understood as the start frequency position and the upper boundary can also be understood as the end frequency position.

Here, it should be understood that when the frequency domain resource X includes an even number of RBs, the center RB is an RB located above and adjacent to the center frequency of X, or the center RB is an RB located below and adjacent to the center frequency of X. For example, frequency domain resource X includes 40 total RBs numbered from 0 to 39, then the center RB corresponds to RB number 19 or RB number 20. The specific ones can be predefined by the protocol, or indicated by the network device. When the number of RBs included in the frequency domain resource X is an odd number, the center RB is an RB in which the center frequency of the frequency domain resource X is located. For example, frequency domain resource X includes a total of 41 RBs numbered from 0 to 40, then the center RB corresponds to RB number 20. Any description concerning the central RB hereinafter may be referred to herein and will not be repeated.

Optionally, the first frequency offset may also be an offset between an upper boundary of the first SSB and a preset frequency of the first resource, an offset between a lower boundary of the first SSB and the preset frequency of the first resource, an offset between a center frequency of a last subcarrier of a last RB of the first SSB and the preset frequency of the first resource, and an offset between a center frequency of a first subcarrier of the first RB of the first SSB and the preset frequency of the first resource, where the offset between the preset frequency of the first resource and the center frequency of the first resource is a preset value, and the preset value is greater than 0. That is, the preset frequency of the first resource may be used as a reference frequency position, and the preset frequency is a frequency position offset from the center frequency of the first resource by a preset value, for example, the preset value may be 10MHz, 20MHz, 30MHz, 40MHz, 50MHz, and the like. It should be understood that the preset values are only examples, and the present application is not limited thereto.

For example, considering that the maximum bandwidth capability supported by the redmap UE in FR1 is 20MHz, and the maximum bandwidth capability supported by FR2 is 100MHz, the preset value may be 10MHz in FR1 and 50MHz in FR 2. In this way, the frequency location of the first SSB can be indicated more flexibly, and it can also be ensured that the total bandwidth occupied by the first resource and the first SSB in the frequency domain does not exceed the maximum bandwidth capability supported by the reccap UE. According to this approach, the indicated first SSB may not be completely included within the first resource.

It should be noted that, the first frequency offset may be represented by the number of RBs, the number of REs, or an absolute frequency (for example, in MHz or KHz), and is not specifically limited herein, and in actual application, the first frequency offset specifically represents which reference frequency location of the first SSB and which reference frequency location of the first resource are offset, and may be determined according to a service requirement, or may be indicated according to a signaling of a network device, or may be predefined according to a protocol, and is not specifically limited herein. It should be appreciated that even if the unit of the first frequency offset is expressed in RB or RE, the specific frequency offset can be accurately determined by scaling to absolute frequency, for example, the unit of RB is to be scaled to MHz, which requires that the subcarrier spacing used in scaling, which may be indicated by the network device, such as RRC signaling, or predefined by the protocol, be known. For example, the subcarrier spacing corresponding to the first frequency offset is equal to the subcarrier spacing of the first resource.

As an example, if the first frequency offset is an offset between the first RB of the first SSB and the first RB of the first resource, assume that a Common Resource Block (CRB) number of the first RB of the first resource is X ₁ CRB number X of first RB of first SSB ₂ The first frequency offset is represented by the number of RBs, and it is understood that the first frequency offset is calculated by X ₂ -X ₁ 。

In one implementation, when the reference frequency position is RB, the unit of the first frequency offset amount may be RB, in other words, the first frequency offset amount is the number of RBs or an integer multiple thereof. For example, if the first frequency offset amount is an offset between the first RB of the first SSB and the first RB of the first resource, the first frequency offset amount is 4, and the CRB number of the first RB of the first resource is Y. The CRB number of the first RB of the first SSB may be determined to be Y +4 according to the first frequency offset.

In one implementation, when the reference frequency location is a specific frequency point, the unit of the first frequency offset may be RE, RB, or absolute frequency. For example, if the first frequency offset is an offset between a center frequency of the first subcarrier of the first RB of the first SSB and a center frequency of the first subcarrier of the first RB of the first resource, in REs.

It should be understood that, when determining the reference frequency location of the first SSB according to the reference frequency location of the first resource and the first frequency offset, it is necessary to specify whether the reference frequency location of the first SSB is located in a direction of increasing RB number or decreasing RB number from the reference frequency location of the first resource. Specifically, it may be predefined by a network device configuration or protocol. For example, the following rules may be defined:

(a) If the first frequency offset is an offset between a center frequency of the first subcarrier of the first RB of the first SSB and a center frequency of the first subcarrier of the first RB of the first resource, the first subcarrier of the first RB of the first SSB is located in a direction of increasing RB numbers from the first subcarrier of the first RB of the first resource.

(b) If the first frequency offset amount is an offset between a center frequency of the last subcarrier of the last RB of the first SSB and a center frequency of the last subcarrier of the last RB of the first resource, the last subcarrier of the last RB of the first SSB is located in a direction in which RB (CRB) numbers decrease from the last subcarrier of the last RB of the first resource.

(c) If the first frequency offset amount is an offset between a center frequency of a first subcarrier of a first RB of the first SSB and a preset frequency of the first resource, and the preset frequency of the first resource is a frequency offset by a preset value from the center frequency of the first resource in a direction of decreasing RB number, the first subcarrier of the first RB of the first SSB is located in a direction of increasing RB (CRB) number from the preset frequency of the first resource.

By the method, the total bandwidth occupied by the first resource and the first SSB in the frequency domain is smaller than or equal to the preset bandwidth, the frequency of radio frequency switching of the terminal equipment can be reduced, and the power consumption of the terminal equipment is reduced.

Note that the first frequency offset amount may be a number greater than 0, a number smaller than 0, or 0. For example, if the first frequency offset amount is an offset between the first RB of the first resource and the first RB of the first SSB, when the first frequency offset amount is a number greater than 0, it indicates that the first RB of the first SSB is located at a position in a direction in which the RB number increases from the first RB of the first resource; when the first frequency offset is equal to 0, it indicates that the first RB of the first SSB is aligned with the first RB of the first resource, and the above alignment may be understood as a frequency offset of 0 or a fixed value. If the first frequency offset amount is an offset between the center frequency of the first resource and the center frequency of the first SSB, when the first frequency offset amount is greater than 0, it indicates that the center frequency of the first SSB is located at a position in a direction from the center frequency of the first resource toward an RB number increasing direction; when the first frequency offset amount is less than 0, it indicates that the center frequency of the first SSB is located at a position in a direction in which the RB number decreases from the center frequency of the first resource; when the first frequency offset is equal to 0, it indicates that the center frequency of the first SSB is aligned with (i.e., the same as) the center frequency of the first resource.

In addition, the start position and the end position of the first frequency offset may be determined according to the positive and negative of the first frequency offset, that is, the reference frequency position of the first resource and the reference frequency position of the first SSB are determined, and the position of the first SSB is further determined. For example, the following rules may be defined:

(a) If the first frequency offset is equal to 0, it indicates that the center frequency of the first subcarrier of the first RB of the first SSB is the same as the center frequency of the first subcarrier of the first RB of the first resource.

(b) If the first frequency offset amount is greater than 0, it indicates that the start position of the first frequency offset amount is the center frequency of the first subcarrier of the first RB of the first resource (i.e., the reference frequency position of the first resource), the end position of the first frequency offset amount is the center frequency of the first subcarrier of the first RB of the first SSB (i.e., the reference frequency position of the first SSB), the first frequency offset amount indicates a frequency offset from the center frequency of the first subcarrier of the first RB of the first resource to the center frequency of the first subcarrier of the first RB of the first SSB, and the first subcarrier of the first RB of the first SSB is located at a position in a direction of increasing RB numbers from the first subcarrier of the first RB of the first resource toward the first subcarrier.

(c) If the first frequency offset is less than 0, it indicates that the start position of the first frequency offset is the center frequency of the last subcarrier of the last RB of the first resource (i.e., the reference frequency position of the first resource), the end position of the first frequency offset is the center frequency of the last subcarrier of the last RB of the first SSB (i.e., the reference frequency position of the first SSB), the absolute value of the first frequency offset indicates a frequency offset from the center frequency of the last subcarrier of the last RB of the first resource to the center frequency of the last subcarrier of the last RB of the first SSB, and the last subcarrier of the last RB of the first SSB is located at a position in a direction of decreasing RB number from the last subcarrier of the last RB of the first resource to the RB.

In this way, the location of the first SSB may be more flexibly configured.

In one implementation, the first frequency offset includes a first partial offset and a second partial offset, the first partial offset is a sum of frequencies of N1 RBs, the second partial offset is a sum of frequencies of N2 subcarriers, the sum of frequencies of N2 subcarriers is less than or equal to a bandwidth of any one of N1 RBs, a subcarrier spacing of the N1 RBs is the same as a subcarrier spacing of the first resource, a subcarrier spacing of the N1 RBs is the same as or different from a subcarrier spacing of the N2 subcarriers, and N1 and N2 are integers.

Regardless of which reference frequency position of the first SSB is offset from which reference frequency position of the first resource, the first frequency offset may include two parts, i.e., a first part offset and a second part offset, where the first part offset may be represented by a value N1 and may be expressed in units of RBs, i.e., a sum of frequencies of N1 RBs, and the second part offset may be represented by a value N2 and may be expressed in units of subcarriers, i.e., a sum of frequencies of N2 subcarriers. It should be understood that the unit of the second fractional offset may also be (resource element, RE), i.e. the sum of the frequencies of N2 subcarriers may also be expressed as the sum of the frequencies of N2 resource elements, RE. It should be understood that the sum of the frequencies of the N2 subcarriers is less than or equal to the bandwidth of any one RB of the N1 RBs, that is, the bandwidth of the N2 subcarriers is less than the bandwidth of one RB. The subcarrier spacing of the N1 RBs may be predefined by the protocol or may be indicated by the network device, for example, the protocol predefined that the subcarrier spacing of the N1 RBs is the same as the subcarrier spacing of the first resource, that is, the subcarrier spacing of the N1 RBs may be determined by the subcarrier spacing of the first resource, and further, the bandwidth which is the first fractional offset, i.e., the absolute frequency value of the first fractional offset, may be determined. The subcarrier spacing of N1 RBs may be the same as or different from the subcarrier spacing of N2 subcarriers, and the subcarrier spacing of N2 subcarriers may be defined by a protocol, e.g., agreed to be 15KHz, or related to a frequency range, e.g., FR1 agreed to be 15khz, fr2 agreed to be 60KHz, or FR1 agreed to be 15khz, fr2 and the subcarrier spacing of the first resource are the same, or may be indicated by a network device, e.g., indicated by the first information. The bandwidth of the second partial offset, i.e. the absolute frequency value of the second partial offset, can be determined by the subcarrier spacing of the N2 subcarriers.

In one implementation, the protocol may predefine one or more values of the first frequency offset, and the first information is used to indicate an index corresponding to the first frequency offset. For example, the protocol defines 16 values in advance, the first information may include 4 bits for indicating an index corresponding to a value defined in advance by the protocol.

In one implementation, as described above, if the first frequency offset includes a first fractional offset and a second fractional offset, the first fractional offset is the sum of the frequencies of N1 RBs, and the second fractional offset is the sum of the frequencies of N2 subcarriers. At this time, the first information may be used to indicate the value of N1, and/or N2. For example, the protocol defines one or more N1 values and one or more N2 values in advance, and the first information is used for indicating the index of N1 and the index of N2. It should be understood that when the agreement predefines only one N1 value or one N2 value, the first information indication is not needed at this time, and the one predefined N1 value or N2 value is the validated N1 value or N2 value. That is, the value of N1 may be a predefined fixed value, at which point the first information would not need to indicate N1. Alternatively, the value of N2 is a predefined fixed value, in which case the first information would not need to indicate N2.

In one implementation, the first frequency offset includes: all possible values of the condition "the total bandwidth occupied by the first SSB and the first resource in the frequency domain is less than or equal to the preset bandwidth" are satisfied, or all possible values of the condition "the frequency domain range of the first resource includes the frequency domain range of the first SSB" are satisfied.

For example, the first resource is an initial downlink BWP configured by the network device for the red beacon UE, the bandwidth is 51 RBs, the subcarrier spacing is 30KHz, and the first frequency offset includes: the condition "the frequency domain range of the first resource includes all possible values of the frequency domain range of the first SSB", the subcarrier spacing of the first SSB is also 30KHz, the first frequency offset represents an offset between a center frequency of a first subcarrier of a first RB of the first resource and a center frequency of a first subcarrier of a first RB of the first SSB, the first frequency offset includes N1 RBs and N2 subcarriers, the subcarrier spacing of the N1 RBs is 30KHz, and the subcarrier spacing of the N2 subcarriers is 15KHz. Then: the value range of N1 is 0-32, and the value range of N2 is 0-24, which is used to indicate that N1 needs 6 bits at most and N2 needs 5 bits at most, that is, the first information needs 11 bits at most. In addition, if the protocol specifies that N2 can only take 1 value, for example, N2=0 or a fixed value, N2 does not need to indicate, and in this case, the first information only needs 6 bits.

Therefore, the position of the first SSB is determined by the method, so that the signaling cost can be saved.

Optionally, the first information may be carried in Downlink Control Information (DCI), for example, the DCI may be DCI scheduling SIB 1.

Optionally, the first information is carried in SIB1 for indication.

Optionally, the first information may also be carried by other SIBs, for example, SIB2 and SIB3-SIBx, where x is a positive integer greater than or equal to 2. Other SIBs may also be newly introduced SIBs specifically for a reccap UE.

Optionally, the first information is carried in the MIB.

In one implementation, the first frequency offset includes a first partial offset and a second partial offset, the first information is carried in the MIB, the first information is used to indicate the first partial offset and the second partial offset, the first partial offset is equal to an offset between a center frequency of a first subcarrier of a first RB of the coreset #0 and a center frequency of a first subcarrier of a Common Resource Block (CRB), and the second partial offset is equal to an offset between a center frequency of a first subcarrier of the CRB and a center frequency of a first subcarrier of a first RB of a second SSB, where the second SSB includes a physical broadcast channel PBCH carrying the MIB, the CRB overlaps in a frequency domain with the first subcarrier of the first RB of the second SSB, and a subcarrier spacing of the CRB is configured by the MIB, that is the first CRB overlapping with the first RB of the second SSB. The second SSB is the CD-SSB searched for when the terminal device initially accesses.

Specifically, taking fig. 4 as an example for explanation, fig. 4 is a schematic diagram of frequency offset of the coreset #0 and the second SSB provided in the present application. As shown in fig. 4, the first frequency offset amount is equal to an offset between a center frequency of a first subcarrier of a first RB of the COERSET #0 and a center frequency of a first subcarrier of a first RB of the second SSB, which includes a first partial offset amount equal to an offset between a center frequency of a first subcarrier of the first RB of the COERSET #0 and a center frequency of a first subcarrier of the CRB, and a second partial offset amount equal to an offset between a center frequency of a first subcarrier of the first RB of the CRB and a center frequency of a first subcarrier of the first RB of the second SSB. In this case, the first partial offset and the second partial offset as shown in fig. 4 multiplex the definitions in the existing protocol.

The network device may indicate the first offset by two fields (or cells) in the MIB, where the first offset is indicated by a controlResourceSetZero field in the MIB, and a value of the controlResourceSetZero field corresponds to an index in a table predefined in the 3GPP protocol 38.213, and a last parameter of a row of the index indicates the first offset. 38.213 are detailed in table 2. As an example, if the value of the controlResourceSetZero field is 2, the first offset is 4 RBs. The subcarrier spacing of the first partial offset is the same as the subcarrier spacing of the COERSET #0, and the subcarrier spacing of the COERSET #0 is indicated in the MIB. The second part offset is indicated by the ssb-SubcarrieronOffset field in the MIB, which may be k _SSB It is noted that the value of the ssb-subcarrieronoffset field indicates the number of subcarriers, for example, the value of the ssb-subcarrieronoffset field is 12, which indicates that the second part offset is 12 subcarriers. The subcarrier spacing for the second part offset is specified by the protocol, specifically 15KHz at FR1 and indicated by MIB signaling at FR2, and is the same as the subcarrier spacing for CORESET #0.

It can be seen that, at this time, the first information includes a controlResourceSetZero cell and a ssb-SubcarrierOffset cell in the MIB, and the first information is not a newly added cell in the MIB but multiplexes an existing cell in the MIB.

And regarding the first resource, for example, the terminal device is a rdcap UE, the first resource may be an initial downlink BWP (referred to as a rdcap UE initial downlink BWP) configured for the rdcap UE alone, and optionally, the first frequency offset represents an offset between a center frequency of the first subcarrier of the first RB of the first SSB and a center frequency of the first subcarrier of the first RB of the rdcap UE initial downlink BWP. It should be appreciated that at this time, once the terminal device determines the frequency location of the red map UE initial downlink BWP, the first frequency offset may be determined based on the control resourcesetzero information element and the SSB-subarrieroffset information element in the MIB to determine the center frequency of the first subcarrier of the first RB of the first SSB. Since the first information is an existing information element in the multiplex MIB, no new signaling indication first frequency offset is needed, and the signaling overhead for determining the frequency location of the first SSB can be considered to be zero.

In one implementation, the first frequency offset amount includes a first partial offset amount and a second partial offset amount, the first information still includes a controlResourceSetZero cell and a ssb-subarrieroffset cell in the MIB, i.e., the first information still multiplexes cells in the existing MIB, but the first partial offset amount may not be equal to an offset between a center frequency of a first subcarrier of a first RB of COERSET #0 and a center frequency of a first subcarrier of a Common Resource Block (CRB), but the protocol may be a predefined value for the first partial offset amount, which may or may not be equal to an offset between a center frequency of a first subcarrier of a first RB of COERSET #0 and a center frequency of a first subcarrier of a Common Resource Block (CRB). For example, the protocol adds a column in table 2 to indicate the first fractional offset, and as shown in table 3, the index determined by the controlled resource set zero cell determines both the first fractional offset and the offset between the center frequency of the first subcarrier of the first RB of the COERSET #0 and the center frequency of the first subcarrier of the Common Resource Block (CRB). The second partial offset is still equal to the offset between the center frequency of the first subcarrier of the CRB and the center frequency of the first subcarrier of the first RB of the second SSB, i.e., the frequency offset value indicated by the SSB-subarrieronoffset information element. The physical broadcast channel PBCH included in the second SSB carries the MIB, the CRB is overlapped with the first subcarrier of the first RB of the second SSB in the frequency domain, and the subcarrier interval of the CRB is configured by the MIB.

TABLE 3

Optionally, the indication information of the first frequency offset (i.e. the first information) is located in two signaling.

In one implementation, the first frequency offset includes a first partial offset and a second partial offset, the first partial offset being indicated by the MIB and the second partial offset being indicated by other signaling, e.g., indicated by SIB1 or DCI. For example, the first partial offset is equal to an offset between a center frequency of a first subcarrier of a first RB of the coreset #0 and a center frequency of a first subcarrier of a Common Resource Block (CRB), that is, the first information includes a control resource set zero cell in the MIB, wherein the second SSB includes a physical broadcast channel PBCH carrying the MIB, the CRB overlaps the first subcarrier of the first RB of the second SSB in the frequency domain, and a subcarrier spacing of the CRB is configured by the MIB. With respect to the second partial offset, the second partial offset may or may not be equal to the offset between the center frequency of the first subcarrier of the CRB and the center frequency of the first subcarrier of the first RB of the second SSB, the particular value being indicated by the network equipment.

In one implementation, the first frequency offset includes a first partial offset and a second partial offset, the second partial offset is indicated by the MIB, and the first partial offset is indicated by other signaling, e.g., SIB1 or DCI. For example, the second partial offset is equal to the offset between the center frequency of the first subcarrier of the CRB and the center frequency of the first subcarrier of the first RB of the second SSB, where the secondThe physical broadcast channel PBCH included by the two SSBs carries the MIB, the CRB is overlapped with the first subcarrier of the first RB of the second SSB in the frequency domain, and the subcarrier spacing of the CRB is configured by the MIB. That is, the second partial offset multiplexes the existing protocol k _SSB The first information comprises an ssb-SubcarrierOffset cell in the MIB. With respect to the first partial offset, the first partial offset may or may not be equal to the offset between the center frequency of the first subcarrier of the first RB of the coreset #0 and the center frequency of the first subcarrier of the CRB, a particular value being indicated by the network equipment.

In one implementation, the first frequency offset includes a first partial offset and a second partial offset, both of which are indicated by other signaling besides the MIB, e.g., indicated by SIB1 or DCI. With respect to the first partial offset, the first partial offset may or may not be equal to the offset between the center frequency of the first subcarrier of the first RB of the corerset #0 and the center frequency of the first subcarrier of the CRB, a particular value being indicated by the network equipment. With respect to the second partial offset, the second partial offset may or may not be equal to the offset between the center frequency of the first subcarrier of the CRB and the center frequency of the first subcarrier of the first RB of the second SSB, the particular value being indicated by the network equipment. The physical broadcast channel PBCH included in the second SSB carries the MIB, the CRB is overlapped with the first subcarrier of the first RB of the second SSB in the frequency domain, and the subcarrier interval of the CRB is configured by the MIB. In this way, the network device can flexibly determine the frequency location of the first SSB.

In one implementation, the first frequency offset includes a first partial offset and a second partial offset, both of which are indicated by other signaling besides the MIB, e.g., indicated by SIB1 or DCI.

If the terminal device receives the first information, determining a first partial offset and a second partial offset according to the first information, where the first partial offset may or may not be equal to an offset between a center frequency of a first subcarrier of a first RB of the corerset #0 and a center frequency of a first subcarrier of the CRB, and a specific value is indicated by the first information, the second partial offset may or may not be equal to an offset between a center frequency of a first subcarrier of the CRB and a center frequency of a first subcarrier of a first RB of a second SSB, and a specific value is indicated by the first information, where a physical broadcast channel PBCH included in the second SSB carries the MIB, the CRB overlaps with the first subcarrier of the first RB of the second SSB in a frequency domain, and a subcarrier spacing of the CRB is configured by the MIB. And if the terminal equipment does not receive the first information, determining the first partial offset and the second partial offset according to a control ResourceSetzero cell and a ssb-SubcarrirOffset cell in the MIB. That is, the first fractional offset is equal to an offset between a center frequency of a first subcarrier of a first RB of the corerset #0 and a center frequency of a first subcarrier of a Common Resource Block (CRB), and the second fractional offset is equal to an offset between a center frequency of a first subcarrier of a first RB of a second SSB, wherein the second SSB includes a physical broadcast channel PBCH carrying the MIB, the CRB overlaps the first subcarrier of the first RB of the second SSB in the frequency domain, and a subcarrier spacing of the CRB is configured by the MIB. In this way, the network device may flexibly determine the frequency location of the first SSB.

In one implementation, the method 300 further includes: s350, the network device sends second information to the terminal device, and correspondingly, the terminal device receives the second information, wherein the second information is used for indicating the existence state of the first SSB. The second information may be carried in at least one signaling of SIB1, downlink control information DCI of scheduling SIB1, or MIB. For example, the second SSB includes a PBCH carrying MIB including the second information.

Optionally, the second information may be carried in other SIBs besides SIB1, for example, system information blocks such as SIB2, SIB3, or SIBx, or a SIB newly introduced for the reccap UE. Wherein x is a positive integer greater than or equal to 2.

The second information indicates the presence status of the first SSB, which may be understood as a display indication, for example, the second information includes 1 bit, and two values of the two bits respectively indicate that the first SSB is present and the first SSB is not present. Alternatively, an implicit indication may be understood, e.g. indicating whether the first SSB is present by whether the second information is sent. And if the terminal equipment receives the second information, the first SSB is considered to exist, and if the terminal equipment does not receive the second information, the first SSB is indicated to not exist.

It should be noted that the presence status of the first SSB includes the presence of the first SSB or the absence of the first SSB, where "presence" means that the network device will send the first SSB, and "absence" means that the network device does not send the first SSB. If the network device sends the first SSB in a certain scheduling period, for example, the network device determines that there are more rdcap terminal devices accessing the network, and in order to better serve the rdcap UE, the rdcap UE does not need to frequently perform radio frequency switching to receive the second SSB, the network device may send the first SSB at the frequency location of the first SSB, or the network device considers that the current resource overhead is not very serious, and the network device may bear the possibility of sending the first SSB and the second SSB simultaneously, and the network device may send the first SSB at the frequency location of the first SSB. If the network device does not transmit the first SSB in a certain scheduling period, for example, the network device determines that there are fewer recap terminal devices accessing the network and there is no need to transmit the first SSB, the network device may choose not to transmit the first SSB.

Therefore, for the terminal device, after receiving the configuration information, the frequency location of the first SSB is determined, and then the presence or absence of the first SSB is determined according to the second information, so as to determine whether the first SSB needs to be received, that is, in the case that the presence of the first SSB is determined according to the second information, the first SSB is received at the frequency location of the first SSB, and in the case that the absence of the first SSB is determined according to the second information, the first SSB is determined not to be received. Or, for the terminal device, after receiving the configuration information, determining whether the first SSB exists according to the second information, thereby determining whether the frequency location of the first SSB needs to be determined according to whether the first SSB exists, that is, determining the frequency location of the first SSB under the condition that the first SSB exists according to the second information, further, receiving the first SSB at the frequency location of the first SSB, and under the condition that the first SSB does not exist according to the second information, not needing to determine the frequency location of the first SSB, and further not receiving the first SSB. The terminal device specifically executes which step first, and the application is not limited.

In one implementation, the second information and the first information are the same information, that is, the terminal device receives the first information, and may determine the first frequency offset according to the first information, where the first frequency offset indicates that the first SSB exists. If the first information is not received, the first frequency offset cannot be determined, which indicates that the first SSB is absent.

In one implementation, the second information is associated with an effective duration within which the presence status of the first SSB is valid. For example, the protocol defines in advance or the network device configures a periodic time window, a period of the periodic time window is equal to a length of each time window of the periodic time window, for example, a period of the periodic time window is 160ms, and in any period of the periodic time window (i.e., in any time window of the periodic time window), the second information is used to indicate whether the first SSB exists in the period. Alternatively, the second information is used to indicate whether the first SSB exists in a period next to the period.

In one implementation, the method 300 further includes: and S360, the terminal equipment determines the frequency position of a second CORESET according to the frequency position of the first SSB and a second frequency offset, wherein the second CORESET is used for the terminal equipment to monitor the PDCCH, and the second frequency offset is the offset from the center frequency of a first subcarrier of a first resource block RB of the second CORESET to the center frequency of a first subcarrier of a first RB of the first SSB.

After determining the frequency location of the first SSB, the terminal device may further determine the frequency location of a second CORESET according to a second frequency offset, where the second frequency offset is an offset between a center frequency of a first subcarrier of a first resource block RB of the second CORESET and a center frequency of a first subcarrier of the first RB of the first SSB, and the second CORESET is used for the terminal device to monitor the PDCCH, that is, the second CORESET is a control resource set configured for the terminal device.

For example, the terminal device is a recap UE, the network device configures an initial downlink BWP for the recap UE separately, that is, the recap UE initial downlink BWP, the first resource is the recap UE initial downlink BWP, the frequency position of the first SSB may be determined according to the recap UE initial downlink BWP and the first frequency offset, and then, in order to monitor the PDCCH in the recap UE initial downlink BWP, the frequency position of a CORESET, that is, the second CORESET may be determined according to the frequency position of the first SSB and the second frequency offset.

In one implementation, similarly, the second frequency offset includes a third portion offset and a fourth portion offset, the third portion offset is a sum of frequencies of N3 RBs, the fourth portion offset is a sum of frequencies of N4 subcarriers, the sum of frequencies of the N4 subcarriers is less than or equal to a bandwidth of any one of the N3 RBs, a subcarrier spacing of the N3 RBs is the same as a subcarrier spacing of the first resource, a subcarrier spacing of the N3 RBs is the same as or different from a subcarrier spacing of the N4 subcarriers, and N3 and N4 are integers.

In one implementation, the third partial offset is equal to an offset between a center frequency of a first subcarrier of a first RB of the corerset #0 and a center frequency of a first subcarrier of a Common Resource Block (CRB), and the fourth partial offset is equal to an offset between a center frequency of a first subcarrier of a CRB and a center frequency of a first subcarrier of a first RB of a second SSB, where the second SSB includes a physical broadcast channel PBCH carrying the MIB, the CRB overlaps the first subcarrier of the first RB of the second SSB in a frequency domain, and a subcarrier spacing of the CRB is configured by the MIB, that is, the CRB is the first CRB overlapping the first RB of the second SSB. The second SSB is the CD-SSB searched for when the terminal device initially accesses. By the implementation mode, no extra signaling overhead is needed when determining the frequency position of the second CORESET, and only the control resource SetZero cell and the ssb-SubcarrirOffset cell in the MIB are multiplexed, so that the configuration signaling overhead can be saved.

In one implementation, the second CORESET is the same bandwidth as CORESET #0.

Optionally, the second CORESET is the same as CORESET #0 except for the frequency position, and the configuration except for the frequency position includes at least one of the following: bandwidth, number of OFDM symbols, control Channel Element (CCE) and Resource Element Group (REG) mapping type cci-REG-MappingType, resource element group (bundle) size REG-binder size, interleaver size, precoding granularity precoding, and demodulation reference signal scrambling identifier (PDCCH-DMRS-scrimblingid) of PDCCH.

The bandwidth represents the number of frequency domain RBs included in the control resource set; the number of OFDM symbols represents the number of time domain OFDM symbols included in the control resource set; the CCE-REG-mapping type indicates a mapping type from CCE to REG, where the mapping type includes, for example, interleaving (interleaved) mapping and non-interleaving (non-interleaved) mapping, and in addition, the configuration other than the frequency position further includes a specific mapping manner, for example, to which REG packets a CCE specifically corresponds, and REG-bundling size indicates the number of REGs included in one REG packet; interleaver size, i.e., the number of rows of the interleaver; precoding indicates the resource size using the same precoding, for example, precoding is set to sameAsREG-bundle indicates that the data uses the same precoding in one REG bundle, and precoding is set to allContiguoussRBs indicates that the data uses the same precoding in all REGs in CORESET; and the PDCCH-DMRS-ScambringID represents a number used for PDCCH DMRS scrambling code initialization.

In one implementation, the presence status of the first SSB may be present or absent.

For example, the network device may not send the first SSB, but the terminal device and the network device may still determine the frequency location of the second CORESET from the frequency location of the first SSB and the second frequency offset.

Optionally, the second CORESET is configured to monitor a paging PDCCH for the terminal device, where the paging PDCCH is a PDCCH sent at a Paging Occasion (PO) and is used to carry paging DCI.

Optionally, the second core set is configured to monitor the PDCCH during the random access (random access), for example, monitor the PDCCH of the scheduling random access response (RAR, i.e. message 2 (msg.2)) and the PDCCH of the scheduling message 4 (msg.4).

In one implementation, the terminal device in the method 300 of the present application is a reduced capability red cap terminal device. Therefore, after the reccap terminal device accesses the cell, it configures an additional first SSB, which can be used for the reduced capability UE to measure when its BWP is active BWP.

In one implementation, the subcarrier spacing of the first SSB is the same as the subcarrier spacing of the second SSB. That is, the protocol may define that the subcarrier spacing of the first SSB and the second SSB are the same.

Optionally, the network device may also indicate the subcarrier spacing of the first SSB.

It should be understood that the frequency domain width of the first SSB is 20 RBs.

In one implementation, the beam pattern (beam pattern) of any one set of SS bursts (SS burst set) comprising the first SSB is the same as the beam pattern of any one set of SS bursts comprising the second SSB, that is, the number of actually transmitted SSBs included in one set of SS bursts is the same for the first SSB and the second SSB, and the relative position of the OFDM symbol occupied by the SSBs included in one set of SS bursts in the time domain in the half frame (half frame) is also the same.

By defining the subcarrier spacing and the beam pattern of the first SSB to be the same as those of the second SSB, no additional signaling indication is needed, and the signaling overhead is saved.

In one implementation, the first SSB has the same period as the second SSB. In this way, the period of the first SSB can be determined according to the period of the second SSB, so that the period of the first SSB does not need to be additionally indicated, and signaling overhead is reduced.

Optionally, the network device may also indicate the periodicity of the first SSB.

Optionally, if the terminal device receives the information indicating the period of the first SSB, the terminal device determines the period of the first SSB according to the information, and if the terminal device does not receive the information indicating the period of the first SSB, the protocol may specify that the period of the first SSB is the same as the period of the second SSB.

In one implementation, the network device sends third information, and the terminal device receives the third information, where the third information is used to indicate a period and a period offset of the first SSB. According to the period and the period offset, the terminal device can determine the time domain position of the network device for sending the first SSB.

For example, if the third information indicates that the first SSB has a period of 20ms and a period offset of 10ms, the first half of the radio frame (radio frame) with odd System Frame Number (SFN) may contain the first SSB. For example, the third information indicates that the period of the first SSB is 20ms and the period offset is 0ms, then the first half frame of the radio frame (radio frame) with even System Frame Number (SFN) may contain the first SSB.

The third information may be carried by SIB1, DCI scheduling SIB1, or other SIBs.

In one implementation, the network device may configure a periodic time window, each of which contains the first SSB. At this time, the length of each time window of the periodic time window is the same and is smaller than the period of the periodic time window. For example, the network device configures a period of the periodic time window, a length of each time window of the periodic time window, and a period offset of the time window at each period. Thus, according to the periodic time window, the terminal device can determine the position of the first SSB in the time domain.

Optionally, the periodic time window is an SSB measurement timing configuration (SSB-MTC) time window.

The following describes a specific implementation of the method 300 provided in the embodiment of the present application with reference to the method 500 in fig. 5. Fig. 5 is another schematic block diagram of a method of communication provided by an embodiment of the present application.

S501, the network device transmits SSB #2 (an example of a second SSB) by broadcasting. The SSB #2 is a CD-SSB, which is associated with a cell.

S502, the recmap UE (an example of a terminal device) initially accesses to search for the CD-SSB, and receives SSB #2. And the terminal equipment analyzes the information carried by the PBCH in the SSB #2 and acquires the MIB information.

S503, the Recmap UE determines the frequency position, the bandwidth and the subcarrier interval of CORESET #0 according to the information of the MIB.

The MIB information includes a frequency offset X of the CORESET #0 and the SSB #2, which includes two parts, namely an offset a and an offset b, where the offset a is an offset between a center frequency of the first subcarrier of the first RB of the CORESET #0 and a center frequency of the first subcarrier of the CRB mentioned above, and the offset b is an offset of the existing protocol k _SSB I.e., the offset between the center frequency of the first subcarrier of the CRB and the center frequency of the first subcarrier of the first RB of the SSB #2, the CRB overlaps the first subcarrier of the first RB of the SSB #2 in the frequency domain, and the subcarrier spacing of the CRB is configured by the MIB. In addition, the MIB information also includes configuration information such as the bandwidth size of CORESET #0 and the subcarrier spacing.

After receiving the SSB #2, the redmap UE may determine the position of the SSB #2, further determine the frequency domain starting position of the CORESET #0 according to the frequency position and the frequency offset X of the SSB #2, and further determine the frequency range of the CORESET #0 according to the information such as the bandwidth size and the subcarrier spacing of the CORESET #0.

S504, the rectap UE monitors the PDCCH for scheduling SIB1 on the CORESET #0, further receives the PDSCH carrying SIB1, and obtains SIB1 information, where the SIB1 information includes configuration information of a frequency location of a resource #1 (an example of a first resource), and as an example, the resource #1 may be a control resource set CORESET #0A (an example of the first CORESET) configured for the rectap UE, may be an initial downlink p configured for the rectap bwue, or may also be an initial uplink BWP configured for the rectap UE.

Specifically, the SIB1 may include information such as a start position, an occupied bandwidth size, and a subcarrier interval of the resource #1.

Optionally, the subcarrier spacing of resource #1 is the same as the subcarrier spacing of CORESET #0.

S505, the reccap UE determines the frequency location of resource #1 according to the SIB1 information.

S506, the recmap UE determines the frequency location of the SSB #1 according to the frequency location of the resource #1 and a frequency offset #1 (an example of a first frequency offset), where the protocol specifies that the frequency offset #1 is equal to the frequency offset X, or the SIB1 includes indication information of the frequency offset #1.

S507, the network device transmits SSB #1, and accordingly, the redmap UE receives SSB #1 at the determined frequency location of SSB #1.

Upon receiving SSB #1, the recmap UE may use SSB #1 for measurement activities.

It should be understood that the detailed description of each step in the method 500 can refer to the detailed description of the method 300, and the detailed description is omitted here.

The technical solutions provided by the communication method according to the embodiment of the present application are described in detail above with reference to fig. 1 to 5, and the communication apparatus according to the embodiment of the present application is described below with reference to fig. 6 to 8.

Fig. 6 is a schematic block diagram of a communication device according to an embodiment of the present application. As shown in fig. 6, the apparatus 600 may be a terminal device, or may be a component (e.g., a unit, a module, a chip, or a chip system) configured in the terminal device, and the apparatus 600 may include a transceiver unit 610 and a processing unit 620.

The transceiving unit 610 is configured to perform transceiving related operations on the terminal device side in the above method embodiments. For example: the transceiver unit 610 is configured to receive configuration information, where the configuration information is used to indicate a frequency location of a first resource, and the first resource is a bandwidth part WBP or a first control resource set CORESET, and the first CORESET is not completely overlapped with CORESET #0 in a frequency domain, and the CORESET #0 is configured by a master information block MIB.

The processing unit 620 is configured to perform processing-related operations on the terminal device side in the above method embodiments. For example, the processing unit 620 is configured to determine the frequency location of the first synchronization signal block SSB according to a first frequency offset and the frequency location of the first resource, where the first frequency offset is an offset between the frequency location of the first resource and the frequency location of the first SSB, and a total bandwidth occupied by the first SSB and the first resource in the frequency domain is less than or equal to a preset bandwidth.

It should be appreciated that the apparatus 600 herein is embodied in the form of a functional unit. The term "unit" herein may refer to an ASIC, an electronic circuit, a processor (e.g., a shared, dedicated, or group processor) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an optional example, it may be understood by those skilled in the art that the apparatus 600 may be embodied as a terminal device in the foregoing method 300 or method 500 embodiment, and the apparatus 600 may be configured to execute each procedure and/or step corresponding to the terminal device in the foregoing method 300 or method 500 embodiment, which is not described herein again to avoid repetition.

It should also be understood that, in an implementation manner, the transceiving unit 610 may include a receiving unit 611 and a sending unit 612, where the receiving unit 611 is configured to perform a receiving function in the transceiving unit 610, for example, receive configuration information from a network device, and the sending unit 612 is configured to perform a sending function in the transceiving unit 610.

Fig. 7 is a schematic block diagram of a communication device according to an embodiment of the present application. As shown in fig. 7, the apparatus 700 may be a network device, or may be a component (e.g., a unit, a module, a chip, or a system of chips) configured in a network device, and the apparatus 700 includes: a processing unit 710 and a transceiving unit 720.

The processing unit 710 is configured to perform processing-related operations on the network device side in the foregoing method embodiments. For example, the processing unit 710 is configured to: for determining configuration information, the configuration information being used to indicate a frequency location of a first resource, the frequency location of the first resource being used by the terminal device to determine a frequency location of a first synchronization signal block SSB, the first resource being a bandwidth portion BWP or a first control resource set CORESET, the first CORESET not completely overlapping with CORESET #0 in the frequency domain, the CORESET #0 being configured by a master information block MIB, and a total bandwidth occupied by the first resource and the first SSB in the frequency domain being less than or equal to a preset bandwidth.

The transceiving unit 720 is configured to perform transceiving related operations on the network device side in the foregoing method embodiments. For example: a transceiving unit 720, configured to send the configuration information to the terminal device. It should be understood that the processing unit 710 and the transceiver unit 720 may further perform any other steps, operations, and/or functions implemented by the network device in the

methods

300 and 500, respectively, and the specific processes of each unit for performing the corresponding steps are described in detail in the foregoing method embodiments, and are not described herein again for brevity.

It should be appreciated that the apparatus 700 herein is embodied in the form of functional units. The term "unit" herein may refer to an ASIC, an electronic circuit, a processor (e.g., a shared, dedicated, or group processor) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an alternative example, it may be understood by those skilled in the art that the apparatus 700 may be embodied as a network device in the foregoing method 300 or method 500 embodiment, and the apparatus 700 may be configured to perform each procedure and/or step corresponding to the network device in the foregoing method 300 or method 500 embodiment, and is not described herein again to avoid repetition.

It should also be understood that, in an implementation manner, the transceiving unit 720 may include a receiving unit 721 and a transmitting unit 722, where the receiving unit 721 is configured to perform a receiving function in the transceiving unit 720, and the transmitting unit 722 is configured to perform a transmitting function in the transceiving unit 720, for example, transmit configuration information to a terminal device.

Fig. 8 is a block diagram of a communication device 800 according to an embodiment of the present disclosure. As shown in fig. 8, the apparatus 800 includes: a processor 810, a memory 820, and a transceiver 830. The processor 810 is coupled to the memory 820 for executing instructions stored in the memory 820 to control the transceiver 830 to transmit and/or receive signals.

It will be appreciated that the processor 810 and memory 820 may be combined into a single processing device, and that the processor 810 may be configured to execute program code stored in the memory 820 to implement the functions described herein. In particular implementations, the memory 820 may also be integrated into the processor 810 or separate from the processor 810. It is to be understood that the processor 810 may also correspond to various processing units in the previous communication device, and the transceiver 830 may correspond to various receiving units and transmitting units in the previous communication device.

It is also understood that transceiver 830 may include a receiver (or, alternatively, a receiver) and a transmitter (or, alternatively, a transmitter). The transceiver may further include an antenna, and the number of antennas may be one or more. The transceiver may also be a communication interface or interface circuit.

Specifically, the communication apparatus 800 may correspond to a terminal device in the

methods

300 and 500 according to the embodiments of the present application, or a network device in the

methods

300 and 500. It should be understood that the specific processes of the units for executing the corresponding steps are already described in detail in the above method embodiments, and therefore, for brevity, detailed descriptions thereof are omitted.

When the communication device 800 is a chip, the chip includes a transceiving unit and a processing unit. The transceiving unit can be an input/output circuit or a communication interface; the processing unit may be a processor or a microprocessor or an integrated circuit integrated on the chip.

In one possible design, the apparatus 800 may be replaced with a chip apparatus, such as a communication chip that may be used in an apparatus to implement the relevant functions of the processor 810 in the apparatus. The chip device can be a field programmable gate array, a special integrated chip, a system chip, a central processing unit, a network processor, a digital signal processing circuit and a microcontroller for realizing related functions, and can also adopt a programmable controller or other integrated chips. The chip may optionally include one or more memories for storing program code that, when executed, causes the processor to implement corresponding functions.

Alternatively, the memory and the processor may be physically separate units, or the memory and the processor may be integrated together.

The embodiment of the present application also provides a computer-readable storage medium on which a computer program for implementing the method in the above method embodiment is stored. When the computer program runs on a computer, the computer is enabled to carry out the method in the above-described method embodiments.

According to the method provided by the embodiment of the present application, the present application provides a computer program product, which includes a computer program, when the computer program runs on a computer, the computer can execute the method in the above method embodiment.

According to the method provided by the embodiment of the present application, the present application further provides a system, which includes the foregoing one or more terminal devices and one or more network devices.

The network device in the foregoing various apparatus embodiments completely corresponds to the terminal device and the network device or the terminal device in the method embodiments, and the corresponding steps are executed by a corresponding module or unit, for example, a communication unit (transceiver) executes the steps of receiving or transmitting in the method embodiments, and other steps besides transmitting and receiving may be executed by a processing unit (processor). The functions of the specific elements may be referred to in the respective method embodiments. The number of the processors may be one or more.

As used in this specification, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between 2 or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from two components interacting with another component in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, an optical disk, or other various media capable of storing program codes.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of communication, the method being performed by a terminal device and comprising:

receiving configuration information, where the configuration information is used to indicate a frequency location of a first resource, where the first resource is a bandwidth portion BWP or a first control resource set, CORESET #0 does not completely overlap in a frequency domain, and CORESET #0 is configured by a master information block MIB;

determining a frequency position of a first synchronization signal block SSB according to a first frequency offset and a frequency position of the first resource, where the first frequency offset is an offset between the frequency position of the first SSB and the frequency position of the first resource, and a total bandwidth occupied by the first resource and the first SSB in a frequency domain is less than or equal to a preset bandwidth.

2. The method of claim 1, further comprising:

receiving first information, where the first information is used to indicate the first frequency offset, and the first information is carried in at least one of the following signaling: system information block 1SIB1, downlink control information DCI or MIB of scheduling SIB 1.

3. The method according to claim 1 or 2, characterized in that the method further comprises:

receiving second information, where the second information is used to indicate a presence status of the first SSB, and the second information is carried in at least one of the following signaling: SIB1, DCI or MIB scheduling SIB 1;

receiving the first SSB at a frequency location of the first SSB if it is determined from the second information that the first SSB exists;

determining not to receive the first SSB in the event that the first SSB is determined to be absent from the second information.

4. The method according to any one of claims 1 to 3, further comprising:

and determining a frequency position of a second CORESET according to the frequency position of the first SSB and a second frequency offset, wherein the second CORESET is used for the terminal equipment to monitor a physical downlink control channel PDCCH, and the second frequency offset is an offset between the center frequency of a first subcarrier of a first resource block RB of the second CORESET and the center frequency of a first subcarrier of a first RB of the first SSB.

5. A method of communication, the method performed by a network device, comprising:

determining configuration information, wherein the configuration information is used for indicating a frequency position of a first resource, the frequency position of the first resource is used for a terminal device to determine a frequency position of a first synchronization signal block SSB, the first resource is a bandwidth part BWP or a first control resource set CORESET, the first CORESET is not completely overlapped with CORESET #0 in a frequency domain, the CORESET #0 is configured by a master information block MIB, and a total bandwidth occupied by the first resource and the first SSB in the frequency domain is less than or equal to a preset bandwidth;

and sending the configuration information to the terminal equipment.

6. The method of claim 5, further comprising:

sending first information to the terminal device, where the first information is used to indicate a first frequency offset, where the first frequency offset is an offset between a frequency location of the first SSB and a frequency location of the first resource, and the first information is carried in at least one of the following signaling: system information block 1SIB1, downlink control information DCI or MIB of scheduling SIB 1.

7. The method of claim 5 or 6, further comprising:

sending second information to the terminal device, where the second information is used to indicate the presence status of the first SSB, and the second information is carried in at least one of the following signaling: SIB1, DCI scheduling SIB1, or MIB.

8. The method according to any one of claims 1 to 4, 6 or 7, wherein the first frequency offset is any one of:

an offset between a first RB of the first SSB and a first RB of the first resource;

an offset between a last RB of the first SSB and a last RB of the first resource;

an offset between a center RB of the first SSB and a center RB of the first resource;

an offset between a lower bound frequency of the first SSB and a lower bound frequency of the first resource;

an offset between an upper bound frequency of the first SSB and an upper bound frequency of the first resource;

an offset between a center frequency of the first SSB and a center frequency of the first resource;

an offset between a center frequency of a first subcarrier of a first RB of the first SSB and a center frequency of a first subcarrier of a first RB of the first resource;

an offset between a center frequency of a last subcarrier of a last RB of the first SSB and a center frequency of a last subcarrier of a last RB of the first resource;

an offset between an upper boundary of the first SSB and a preset frequency of the first resource;

an offset between a lower boundary of the first SSB and a preset frequency of the first resource;

and the offset between the preset frequency of the first resource and the center frequency of the first resource is a preset value, and the preset value is greater than 0.

9. The method according to any one of claims 1 to 4, 6 to 8,

the first frequency offset includes a first partial offset and a second partial offset, the first partial offset is the sum of frequencies of N1 RBs, the second partial offset is the sum of frequencies of N2 subcarriers, the sum of frequencies of N2 subcarriers is less than or equal to the bandwidth of any one RB of the N1 RBs, the subcarrier spacing of the N1 RBs is the same as the subcarrier spacing of the first resource, the subcarrier spacing of the N1 RBs is the same as or different from the subcarrier spacing of the N2 subcarriers, and N1 and N2 are integers.

10. The method of claim 9,

the first partial offset amount is equal to an offset between a center frequency of a first subcarrier of a first RB of the COERSET #0 and a center frequency of a first subcarrier of a common resource block CRB, the second partial offset amount is equal to an offset between a center frequency of the first subcarrier of the CRB and a center frequency of a first subcarrier of a first RB of a second SSB,

wherein a physical broadcast channel PBCH included in the second SSB carries the MIB, the CRB overlaps with a first subcarrier of a first RB of the second SSB in a frequency domain, and a subcarrier spacing of the CRB is configured by the MIB.

11. The method according to any one of claims 1 to 10,

the first resource is an initial downlink BWP or an initial uplink BWP, the frequency range of the first resource does not include the frequency range of the second SSB, and the PBCH included in the second SSB carries the MIB.

12. The method according to any one of claims 1 to 11,

the frequency range of the first resource comprises a frequency range of the first SSB.

13. The method according to any one of claims 1 to 12,

the terminal equipment is a reduced capability RedCap terminal equipment.

14. A communications apparatus, comprising: means for performing the steps in the method of any one of claims 1 to 13.

15. A communications apparatus, comprising:

a memory for storing computer instructions;

a processor for executing computer instructions stored in the memory, causing the apparatus to perform the method of any of claims 1 to 13.

16. A computer-readable storage medium, having stored thereon a computer program for executing the method according to any one of claims 1 to 13.

17. A chip system, comprising: a processor for executing a stored computer program for performing the method of any one of claims 1 to 13.