CN111586710B

CN111586710B - Communication method and device

Info

Publication number: CN111586710B
Application number: CN201910117892.6A
Authority: CN
Inventors: 李新县; 唐浩; 王婷
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-02-15
Filing date: 2019-02-15
Publication date: 2021-12-24
Anticipated expiration: 2039-02-15
Also published as: CN111586710A; WO2020164392A1

Abstract

A communication method and device, the method includes: a first terminal device receives information of a second bandwidth part BWP sent by a second terminal device, wherein the second BWP is the BWP of the second terminal device for performing side link communication; and the first terminal equipment sends the information of the second BWP to network equipment. By adopting the method and the device, the two terminal devices can perform the sidelink communication on the configured BWP.

Description

Communication method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communication method and apparatus.

Background

In a New Radio (NR) system, communication of a terminal device is divided into Uu air interface communication and Sidelink (SL) communication. The Uu air interface communication refers to communication between the terminal equipment and the base station on air interface resources. The side link communication refers to communication between the terminal equipment and the terminal equipment on side link resources. Meanwhile, in the NR system, a concept of bandwidth part (BWP) is introduced, and how to perform sidelink communication using BWP is a current research focus.

Disclosure of Invention

The application provides a communication method and device, so that two terminal devices can perform sidelink communication on a configured BWP.

In a first aspect, a communication method is provided, including: a first terminal device receives information of a second bandwidth part BWP sent by a second terminal device, wherein the second BWP is the BWP of the second terminal device for performing side link communication; and the first terminal equipment sends the information of the second BWP to network equipment.

As can be seen from the above, in the embodiment of the present application, the second terminal device may send the information of the second BWP of the second terminal device to the first terminal device, and the first terminal device forwards the information of the second BWP to the network device. The network device may determine whether the second BWP and the first BWP satisfy the condition for the side-link communication according to the received information of the second BWP of the second terminal device and the acquired information of the first BWP of the first terminal device, and if not, configure the BWP for at least one of the first terminal device and the second terminal device, so that the BWP between the first terminal device and the second terminal device satisfies the condition for the side-link communication, thereby ensuring that the side-link communication can be performed normally between the first terminal device and the second terminal device.

In one possible design, the method further includes: and the first terminal device sends information of a first BWP to the second terminal device, wherein the first BWP is the BWP of the first terminal device for performing the sidelink communication.

As can be seen from the above, in the embodiment of the present application, the first terminal device and the second terminal device may exchange their BWP information with each other, thereby facilitating the sidelink communication between the two devices.

In one possible design, the information of the second BWP is configuration information of the second BWP, and the information of the first BWP is configuration information of the first BWP.

In one possible design, the information of the second BWP is an identifier of the second terminal device, and the identifier of the second terminal device is associated with the second BWP; the information of the first BWP is an identifier of the first terminal device, and the identifier of the first terminal device is associated with the first BWP.

As can be seen from the above, in this embodiment of the application, the information of the second BWP sent by the second terminal device is specifically an identifier of the second terminal device. Compared with the method, the configuration information of the second BWP of the second terminal equipment is directly sent, and the air interface overhead can be saved.

In one possible design, the associating the identification of the second terminal device with the second BWP includes: the identity of the second terminal device and the state of the second terminal device are associated with the second BWP, the method further comprising: the first terminal equipment receives the state of the second terminal equipment sent by the second terminal equipment; and the first terminal equipment sends the state of the second terminal equipment to the network equipment.

In one possible design, the method further includes: the first terminal device switches the BWP used by the first terminal device for the sidelink communication from the first BWP to a third BWP according to configuration information of the third BWP, where the third BWP is a BWP configured by the network device for the first terminal device and used for the sidelink communication with the second terminal device.

As can be seen from the above, when the BWP between the first terminal device and the second terminal device does not satisfy the conditions for the sidelink communication, the sidelink information of the first terminal device and/or the second terminal device may be reconfigured according to the configuration of the network device, thereby ensuring the normal sidelink communication between the two terminal devices.

In a second aspect, a communication method is provided, including: the network device receives information of a second bandwidth part BWP sent by the first terminal device, wherein the second BWP is the BWP of the second terminal device for performing side link communication; and the network device configures the BWP for at least one of the first terminal device and the second terminal device according to the information of the second BWP and the information of the first BWP, where the first BWP is the BWP where the first terminal device performs the sidelink communication.

As can be seen from the above, in this embodiment of the present application, the network device may reconfigure the BWP for at least one of the first terminal device and the second terminal device according to the BWP information between the first terminal device and the second terminal device, so as to ensure normal sidelink communication between the two terminal devices.

In a possible design, the information of the second BWP is an identifier of the second terminal device, the identifier of the second terminal device is associated with the second BWP, and the information of the first BWP is configuration information of the second terminal device;

the method further comprises the following steps: and the network equipment determines the configuration information of the second BWP according to the identification of the second terminal equipment.

As can be seen from the above, in this embodiment of the application, the second BWP information reported by the second terminal device is an identifier of the second terminal device. Accordingly, the network device may determine the configuration information of the second BWP based on the identity of the second terminal device. Compared with the case that the second terminal device directly reports the configuration information of the second BWP, the air interface overhead can be saved.

In one possible design, the determining, by the network device, the configuration information of the second BWP according to the identity of the second terminal device includes: the network equipment determines the state of the second terminal equipment according to the identifier of the second terminal equipment; and the network equipment determines the configuration information of the second BWP according to the state of the second terminal equipment.

In one possible design, the determining, by the network device, the configuration information of the first BWP according to the state of the second terminal device includes: when the state of the second terminal device is the first state, determining the configuration information of the second BWP according to the identifier of the second terminal device; or, when the state of the second terminal device is the second state, determining that the configuration information of the second BWP is the configuration information of the pre-configured BWP or the configuration information of the common BWP.

In one possible design, the associating the identification of the second terminal device with the second BWP includes: the identity of the second terminal device is associated with the second BWP with the state of the second terminal device; the method further comprises the following steps: and the network equipment receives the state of the second terminal equipment sent by the first terminal equipment.

In one possible design, the network device configures BWP for at least one of the first and second terminal devices, including: the network device configures a third BWP for the first terminal device, where the third BWP is a BWP where the first terminal device and the second terminal device perform sidelink communication; and/or the network device configures a fourth BWP for the second terminal device, where the fourth BWP is a BWP where the second terminal device performs sidelink communication with the first terminal device.

In one possible design, when the network device configures BWP for at least one of the first terminal device and the second terminal device according to the information of the second BWP and the information of the first BWP, at least any one of the following conditions is satisfied between the second BWP and the first BWP: the system parameters of the second BWP are different from the system parameters of the first BWP; the transmit resource pool of the first BWP does not overlap with the receive resource pool of the second BWP.

In a third aspect, a communication apparatus is provided, where the apparatus may be a terminal device, or an apparatus in a terminal device, or an apparatus capable of being used in cooperation with a terminal device, and the apparatus may include a transceiver module, and the transceiver module may perform corresponding functions in any design example of the first aspect, specifically:

a transceiver module, configured to receive information of a second bandwidth part BWP sent by a second terminal device, where the second BWP is the BWP where the second terminal device performs sidelink communication;

the transceiver module is further configured to send information of the second BWP to a network device.

In one possible design, the transceiver module is further configured to: and sending information of a first BWP to the second terminal device, wherein the first BWP is the BWP of the first terminal device for performing the link-by-link communication.

In one possible design, the associating the identification of the second terminal device with the second BWP includes: the identity of the second terminal device and the state of the second terminal device are associated with the second BWP, the transceiver module is further configured to:

receiving the state of the second terminal equipment sent by the second terminal equipment;

and sending the state of the second terminal equipment to the network equipment.

In one possible design, the apparatus further includes a processing module, configured to switch, according to configuration information of a third BWP, a BWP used by the first terminal device for the side-link communication from the first BWP to the third BWP, where the third BWP is a BWP configured by the network device for the first terminal device and used for the side-link communication with the second terminal device.

In a fourth aspect, a communication apparatus is provided, where the apparatus may be a network device, or an apparatus in a network device, or an apparatus capable of being used in conjunction with a network device, the apparatus may include a processing module and a transceiver module, and the transceiver module and the processing module may perform corresponding functions in any design example of the second aspect, specifically:

a transceiver module, configured to receive information of a second bandwidth part BWP sent by a first terminal device, where the second BWP is the BWP for a second terminal device to perform sidelink communication;

a processing module, configured to configure a BWP for at least one of the first terminal device and the second terminal device according to the information of the second BWP and the information of the first BWP, where the first BWP is a BWP for the first terminal device to perform the sidelink communication.

the processing module is further configured to: determining configuration information of the second BWP according to the identity of the second terminal device.

In a possible design, when determining the configuration information of the second BWP according to the identifier of the second terminal device, the processing module is specifically configured to: determining the state of the second terminal equipment according to the identifier of the second terminal equipment; determining configuration information of the second BWP according to the state of the second terminal device.

In a possible design, when determining the configuration information of the first BWP according to the state of the second terminal device, the processing module is specifically configured to: when the state of the second terminal device is the first state, determining the configuration information of the second BWP according to the identifier of the second terminal device; or, when the state of the second terminal device is the second state, determining that the configuration information of the second BWP is the configuration information of the pre-configured BWP or the configuration information of the common BWP.

In one possible design, the associating the identification of the second terminal device with the second BWP includes: the identity of the second terminal device is associated with the second BWP with the state of the second terminal device;

the transceiver module is further configured to: and receiving the state of the second terminal equipment sent by the first terminal equipment.

In one possible design, when configuring BWP for at least one of the first terminal device and the second terminal device, the processing module is specifically configured to: configuring a third BWP for the first terminal device, wherein the third BWP is a BWP for which the first terminal device and the second terminal device perform side-link communication; and/or configuring a fourth BWP for the second terminal device, where the fourth BWP is a BWP where the second terminal device performs a sidelink communication with the first terminal device.

In one possible design, when configuring BWP for at least one of the first terminal device and the second terminal device according to the information of the second BWP and the information of the first BWP, at least one of the following conditions is satisfied between the second BWP and the first BWP: the system parameters of the second BWP are different from the system parameters of the first BWP; the transmit resource pool of the first BWP does not overlap with the receive resource pool of the second BWP.

In a fifth aspect, a communication device is provided, the device comprising a communication interface for implementing the method described in the first aspect above. The communication interface is used for the apparatus to communicate with other devices, for example, a transceiver, a circuit, a bus, a module or other types of communication interfaces, and the other devices may be the first terminal device, etc. The apparatus further comprises a processor configured to control the communication interface to implement the method described in the first aspect when executing the program instructions stored in the memory. The apparatus may also include a memory for storing instructions and data, and in one possible design, the apparatus includes:

a memory for storing program instructions;

a communication interface, configured to receive information of a second bandwidth part BWP sent by a second terminal device, where the second BWP is the BWP where the second terminal device performs sidelink communication;

a communication interface further configured to send information of the second BWP to a network device.

In one possible design, the communication interface is further to: and sending information of a first BWP to the second terminal device, wherein the first BWP is the BWP of the first terminal device for performing the link-by-link communication.

In one possible design, the associating the identification of the second terminal device with the second BWP includes: the identity of the second terminal device and the state of the second terminal device are associated with the second BWP, the communication interface further configured to:

In one possible design, the apparatus further includes a processor configured to switch, according to configuration information of a third BWP, a BWP used by the first terminal device for the side-link communication from the first BWP to the third BWP, where the third BWP is a BWP configured by the network device for the first terminal device and used for the side-link communication with the second terminal device.

In a sixth aspect, a communication device is provided, the device comprising a processor for implementing the method described in the second aspect above. The apparatus may also include a memory to store instructions and data. The memory is coupled to the processor, and the processor, when executing the program instructions stored in the memory, may implement the method described in the second aspect above. The apparatus may also include a communication interface for the apparatus to communicate with other devices, such as a transceiver, circuit, bus, module, or other type of communication interface, such as the first terminal device, etc. In one possible design, the apparatus includes:

a memory for storing program instructions;

a communication interface, configured to receive information of a second bandwidth part BWP sent by a first terminal device, where the second BWP is a BWP for a second terminal device to perform sidelink communication;

a processor, configured to configure BWP for at least one of the first terminal device and the second terminal device according to the information of the second BWP and the information of the first BWP, where the first BWP is the BWP for the first terminal device to perform the sidelink communication.

the processor is further configured to: determining configuration information of the second BWP according to the identity of the second terminal device.

In a possible design, when determining the configuration information of the second BWP according to the identifier of the second terminal device, the processor is specifically configured to: determining the state of the second terminal equipment according to the identifier of the second terminal equipment; determining configuration information of the second BWP according to the state of the second terminal device.

In one possible design, when determining the configuration information of the first BWP according to the state of the second terminal device, the processor is specifically configured to: when the state of the second terminal device is the first state, determining the configuration information of the second BWP according to the identifier of the second terminal device; or, when the state of the second terminal device is the second state, determining that the configuration information of the second BWP is the configuration information of the pre-configured BWP or the configuration information of the common BWP.

the communication interface is further configured to: and receiving the state of the second terminal equipment sent by the first terminal equipment.

In one possible design, the processor, when configuring BWP for at least one of the first terminal device and the second terminal device, is specifically configured to: configuring a third BWP for the first terminal device, wherein the third BWP is a BWP for which the first terminal device and the second terminal device perform side-link communication; and/or configuring a fourth BWP for the second terminal device, where the fourth BWP is a BWP where the second terminal device performs a sidelink communication with the first terminal device.

In a seventh aspect, an embodiment of the present application further provides a computer-readable storage medium, which includes instructions that, when executed on a computer, cause the computer to perform the method of any one of the possible designs of the first aspect or the second aspect.

In an eighth aspect, an embodiment of the present application further provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the method of the first aspect or the second aspect. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

In a ninth aspect, this application further provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the first or second aspect.

In a tenth aspect, the present embodiments provide a system, where the system includes the apparatus of the third aspect and the apparatus of the fourth aspect, or the system includes the apparatus of the fifth aspect and the apparatus of the sixth aspect.

Drawings

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

fig. 2 is a schematic diagram of different time units at different subcarrier intervals according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a BWP provided by an embodiment of the present application;

fig. 4 to fig. 11 are schematic flow charts of a communication method according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 13 is another schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

Fig. 1 shows one of the communication systems 100 to which the embodiment of the present application is applied. The communication system 100 may include at least one network device 110. Network device 110 may be a device that communicates with terminal devices, such as a base station or base station controller. Each network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within that coverage area (cell). The network device 110 may be a Base Transceiver Station (BTS) in a global system for mobile communications (GSM) system or a Code Division Multiple Access (CDMA) system, a base station (nodeB) in a Wideband Code Division Multiple Access (WCDMA) system, an evolved base station (evolved nodeB, eNB, or eNodeB) in an LTE system, a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or a relay station, an access point, a vehicle-mounted device, a wearable device, and a network device in a future 5G network, for example, a base station (G or NB) or a receiving/transmitting point (BTS, or transmitting/receiving point) in a new radio Network (NR), or a public mobile network (BTS ), a base station (NB, or receiving/receiving point) in a future 5G network, or a public mobile network (TRP, NB, future) 110, PLMN), and the like, and the embodiments of the present application are not limited.

The communication system 100 also includes one or more terminal devices 120 located within the coverage area of the network device 110. The terminal device 120 may be mobile or stationary. The terminal equipment 120 may refer to an access terminal, User Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user equipment. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which are not limited in this embodiment.

The network device 110 and the terminal device 120 may perform data transmission via an air interface resource, where the air interface resource may include at least one of a time domain resource, a frequency domain resource, and a code domain resource. Specifically, when the network device 110 and the terminal device 120 perform data transmission, the network device 110 may transmit control information to the terminal device 120 through a control channel, such as a Physical Downlink Control Channel (PDCCH), so as to allocate a resource of a data channel, such as a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH), to the terminal device 120. For example, the control information may indicate symbols and/or Resource Blocks (RBs) to which the data channels are mapped, and the network device 110 and the terminal device 120 perform data transmission on the data channels at the allocated time-frequency resources. The data transmission may include downlink data transmission and/or uplink data transmission, where the downlink data (e.g., data carried by PDSCH) transmission may refer to the network device 110 sending data to the terminal device 120, and the uplink data (e.g., data carried by PUSCH) transmission may refer to the terminal device 120 sending data to the network device 110. The data may be generalized data, such as user data, system information, broadcast information, or other information.

In the communication system shown in fig. 1, terminal devices 120 may also perform data transmission through sidelink resources, and similar to the air interface resources, the sidelink resources may also include at least one of time domain resources, frequency domain resources, and code domain resources. Specifically, the physical channel for data transmission by the terminal device 120 may include at least one of a physical sidelink shared channel (PSCCH), a Physical Sidelink Control Channel (PSCCH), a Physical Sidelink Feedback Channel (PSFCH), or the like. The PSCCH is used for transmitting data, the PSCCH is used for transmitting control information, such as Scheduling Assignment (SA) information, and the PSFCH is used for transmitting feedback information, such as Channel State Information (CSI), positive Acknowledgement (ACK), Negative Acknowledgement (NACK), or the like, which may be included in the feedback information.

Fig. 1 exemplarily shows one network device and two terminal devices, and optionally, the communication system 100 may include a plurality of network devices and may include other numbers of terminal devices within the coverage of one network device, which is not limited in this embodiment of the present application. In addition, it is understood that the bypass communication in the embodiment of the present application may refer to communication between one terminal device and another terminal device (for example, unicast, etc.), or the bypass communication may refer to communication between one terminal device and multiple terminal devices (for example, multicast, broadcast, etc.), which is not limited in this embodiment of the present application. For convenience of description, in the embodiments of the present application, "sidelink communication refers to communication between one terminal device and another terminal device" is taken as an example for explanation.

Some of the communications nouns or terms used in this application are explained below and are also considered part of the inventive content of this application.

One, Side Link (SL)

The sidelink is used for communication between the terminal device and the terminal device, and may include a physical sidelink shared channel (PSCCH) and a Physical Sidelink Control Channel (PSCCH). The psch is configured to carry sidelink data (SL data), the PSCCH is configured to carry Sidelink Control Information (SCI), and information included in the SCI is used for sidelink scheduling assignment (SL SA). The SL SA is information related to data scheduling, such as resource allocation and/or Modulation and Coding Scheme (MCS) for carrying the PSSCH.

Optionally, the sidelink communication may further include: physical Sidelink Feedback Channel (PSFCH). The physical sidelink feedback channel may also be referred to simply as a sidelink feedback channel. The physical sidelink feedback channel may be used to transmit Sidelink Feedback Control Information (SFCI), and the sidelink feedback control information may also be referred to as sidelink feedback information for short. The sidelink feedback control information may include one or more of Channel State Information (CSI) and hybrid automatic repeat request (HARQ), and the like. The HARQ information may include Acknowledgement (ACK) or Negative Acknowledgement (NACK), and the like.

Second, Uu air interface

The Uu air interface may be referred to as Uu for short, and is used for communication between the terminal device and the access network device. The Uu air interface may be understood as an interface (universal UE to network interface) between a universal User Equipment (UE) and a network. The transmission of the Uu air interface may include uplink transmission and downlink transmission.

The uplink transmission refers to that the terminal device sends information to the access network device, and the information of the uplink transmission may be referred to as uplink information or an uplink signal. The uplink information or the uplink signal may include one or more of a PUSCH, a PUCCH, and a Sounding Reference Signal (SRS). A channel for transmitting uplink information or uplink signals is referred to as an uplink channel, and the uplink channel may include one or more of a physical uplink data channel (PUSCH) and a Physical Uplink Control Channel (PUCCH). The PUSCH is used to carry uplink data, which may also be referred to as uplink data information. The PUCCH is used to carry Uplink Control Information (UCI) fed back by the terminal device. For example, the UCI may include one or more of Channel State Information (CSI), ACK, NACK, and the like fed back by the terminal device.

The downlink transmission refers to that the access network device sends information to the terminal device, and the downlink transmission information may be downlink information or a downlink signal. The downlink information or downlink signal may include one or more of a PDSCH, a PDCCH, a channel state information reference signal (CSI-RS), and a Phase Tracking Reference Signal (PTRS). A channel for transmitting downlink information or downlink signals is called a downlink channel, and the downlink channel may include one or more of a Physical Downlink Shared Channel (PDSCH) and a Physical Downlink Control Channel (PDCCH). The PDCCH is used to carry Downlink Control Information (DCI), and the PDSCH is used to carry downlink data (data), where the downlink data may also be referred to as downlink data information.

Third, system parameter (numerology)

The system parameters may also be referred to as frame structure parameters. The system parameters may include one or more of subcarrier spacing and Cyclic Prefix (CP) type, etc. The CP type may also be referred to as CP length, or simply CP. The CP type may be an extended CP or a normal (normal) CP. The extended CP next slot may include 12 time domain symbols and the normal CP next slot may include 14 time domain symbols. The time domain symbols may be referred to simply as symbols. The time domain symbol may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol, or an orthogonal frequency division multiplexing (DFT-s-OFDM) symbol based on discrete fourier transform extension, and in this embodiment, the time domain symbol may be an OFDM symbol.

As shown in table 1, in the NR system, 5 system parameters may be supported, numbered 0 to 4, respectively. The system parameters corresponding to the number 0 are: the subcarrier interval is 15kHz, the CP is normal CP, and the system parameters corresponding to the number 1 are as follows: the subcarrier interval is 30kHz, the CP is normal CP, and the system parameters corresponding to the number 2 are as follows: the subcarrier interval is 60kHz, the CP is normal CP or extended CP, and the system parameter corresponding to the number 3 is: the subcarrier interval is 120kHz, the CP is normal CP, and the system parameters corresponding to the number 4 are as follows: the subcarrier spacing is 240kHz and the CP is normal CP.

Table 1 supported system parameters

There may be different slot lengths for different subcarrier spacings. For example, a time slot may be 1 millisecond (ms) when the subcarrier spacing is 15 kHz; one slot may be 0.5ms when the subcarrier spacing is 30 kHz. One slot may include one or more symbols. For example, the next slot of a normal Cyclic Prefix (CP) may include 14 symbols, and the next slot of an extended CP may include 12 symbols. A minislot, also called a mini-slot, may be a unit smaller than a slot, and one minislot may include one or more symbols. For example, a micro-slot may include 2 symbols, 4 symbols, or 7 symbols, etc. One slot may include one or more minislots.

As shown in fig. 2, taking the subcarrier spacing of 15kHz as an example, 1 radio frame includes 10 subframes, each subframe may include 1 slot, and each slot may include 14 symbols. Wherein, 1 radio frame can last for 10ms, each subframe can last for 1ms, and each slot can last for 1 ms. Further, a micro slot may include 4 symbols, 2 symbols, or 7 symbols, etc.

The slot characteristics under different system parameters are shown in table 2. Wherein the content of the first and second substances,

indicating the number of symbols included in a slot and the symbol number in the slot(or called index) is

For example, under the normal CP, there may be 14 symbols, and under the extended CP, there may be 12 symbols. One radio frame may include 10 subframes, one radio frame may be 10ms, and one subframe may be 1 ms.

Indicates the number of timeslots included in a radio frame under the system parameter μ, and the timeslot number (or called index) in a radio frame

Is composed of

Indicates the number of slots included in one subframe and the slot number in one subframe under the system parameter mu

TABLE 2 timeslot characteristics under System parameters under Normal CP

Fourth, carrier bandwidth part (BWP)

The carrier bandwidth part may be referred to as bandwidth part (BWP) for short, where BWP is a set of contiguous frequency domain resources on the carrier, e.g. BWP is a set of contiguous Resource Blocks (RBs) on the carrier, or BWP is a set of contiguous subcarriers on the carrier, or BWP is a set of contiguous Resource Block Groups (RBGs) on the carrier. Wherein, one RBG includes at least one RB, e.g., 1, 2, 4, 6, or 8, etc., and one RB may include at least one subcarrier, e.g., 12, etc. In one possible implementation, for example, in the method shown in release15 (release15, Rel-15) of NR, in a cell, for a terminal device, a network may configure a maximum of 4 BWPs for the terminal device, and in Frequency Division Duplexing (FDD), uplink and downlink may each configure 4 BWPs, and in Time Division Duplexing (TDD), uplink and downlink may each configure 4 BWPs. The network device may configure the terminal device with system parameters including subcarrier spacing and/or CP length for each BWP. At any time, only one BWP can be activated in one cell, and the terminal device and the network device perform data transceiving on the activated BWP. Existing BWPs are defined on a given carrier, i.e. the resources of a BWP are located within one carrier resource.

As shown in #1 of fig. 3, within a carrier bandwidth (carrier BW), only one BWP may be configured for one UE, the BWP having a bandwidth less than or equal to a UE bandwidth capability (UE bandwidth capability) less than or equal to the carrier bandwidth (carrier BW). As shown in #2 of fig. 3, in the carrier bandwidth, two BWPs, BWP1 and BWP2, respectively, may be configured for one UE, and the bandwidths of BWP1 and BWP2 overlap. As shown in #3 of fig. 3, in the carrier bandwidth, two BWPs, BWP1 and BWP2, respectively, may be configured for one UE, and BWP1 and BWP2 do not overlap. The system parameters for BWP1 and BWP2 may be the same system parameters or may be different system parameters. In practice, the configuration of the BWP (for example, the number, location, and/or system parameters of the BWP) may be other configurations, and the embodiment of the present invention is not limited thereto.

Fifthly, Radio Resource Control (RRC) connected state and RRC idle (idle) state

After establishing RRC connection with the network equipment, the terminal equipment enters an RRC connection state, otherwise, the terminal equipment is in an RRC idle state. When the terminal device is in the RRC connected state, the main working process includes: monitoring a control channel, providing channel quality measurement and feedback, performing neighbor cell measurement and reporting a test report, monitoring a paging channel, acquiring system information and the like. When the terminal device is in the RRC idle state, the main working process includes: monitoring a paging channel, performing neighbor cell measurement, cell selection or reselection, acquiring system messages, and the like. For convenience of description, in the following examples, the RRC connected state may be simply referred to as a connected state. The RRC idle state is referred to as an idle state for short.

Sixth, an In Coverage (IC) state and an out of coverage (OOC) state

When a terminal device is interested in performing sidelink communications on a non-serving frequency, inter-carrier frequency measurements may be provided for the non-serving frequency for cell selection and intra-frequency reselection according to a measurement protocol.

When the UE detects at least one cell satisfying the S criterion on its configured SL operating frequency, according to the measurement and evaluation requirements of SL triggered cell selection or reselection, the terminal device may consider to operate in the coverage area, i.e., IC state, on the SL operating frequency. If the terminal device cannot detect any cell that meets the S criteria, the terminal device may consider itself to be out of coverage of the sidelink frequency on that frequency, i.e., in the OOC state.

Seventh, base station scheduling mode

In the base station scheduling mode, the network device may configure SL resources for the sending end UE and/or the receiving end UE through the configuration information, where the SL resources include one or more resource pools. In the embodiments of the present application, the plurality may be 2, 3, 4 or more, and the embodiments of the present application are not limited. The network device may indicate, to the sending end UE, a resource for performing sidelink communication in a resource pool through DCI, and when receiving the DCI, the sending end UE may send SL information to the receiving end UE by using the resource in the resource pool indicated by the DCI, where the SL information may include SL data and/or SCI and/or SFCI, and correspondingly, the receiving end may receive the SL information. The network device may be a base station, or a network management system operated by an operator.

As shown in fig. 4, the network device may configure SL resources for UE1 and UE2, the network device may send DCI to UE1, and UE1 may determine SL transmission resources on which to send SCI and/or SL data according to the indication of the DCI. The UE2 determines the SL receiving resource according to the configured SL resource, receives the SCI on the SL receiving resource, and receives the SL data on the receiving resource according to the SCI. Optionally, the UE2 may send 1 send SFCI to the UE after receiving SL data. For example, if the UE2 correctly receives SL data, a positive acknowledgement ACK may be included in the SFCI, otherwise a negative acknowledgement NACK, etc., may be included in the SFCI.

In an example, the network device may configure SL resources for UE1, UE2, and UE3, and the network device may allocate SL transmission resources for UE3 and UE1 via DCI. The UE3 may send SL signals to the UE1 on the SL transmission resources, e.g., the SL signals may include SCI and/or SL data, etc. UE1, upon receiving the SL signal, UE1 may send an SFCI to UE 3. Optionally, at the same time, the UE1 may transmit SL signals to the UE2 on SL transmission resources, for example, the SL signals may include SCI and/or SL data, etc. UE2, upon receiving the SL signal, UE2 may send an SFCI to UE 1.

Optionally, the base station scheduling mode may also be referred to as a base station assisted scheduling mode, which may also be referred to as mode 1(mode 1) or mode 3(mode 3).

Eight, UE autonomous selection mode

In the UE autonomous selection mode, the network device may configure SL resources for the sending end UE and/or the receiving end UE through the configuration information, where the SL resources include one or more resource pools. The sending end UE senses in the configured SL resources, if the available resources are sensed in the SL resources, the SL information is sent in the available resources, and correspondingly, the receiving end UE receives the SL information in the SL resources.

As shown in fig. 5, the network device may configure SL resources for UE1 and UE2, UE1 may sense SL transmission resources among the configured SL resources, and transmit SCI and/or SL data among the SL transmission resources. Accordingly, the UE2 receives SCI and/or SL data according to the configured SL resources. Optionally, after receiving the SL data, the UE2 may sense the SL transmission resource in the configured SL resource, and send the SFCI and the like to the UE1 on the SL transmission resource.

Similar to the base station scheduling mode for sidelink SL described above, when UE1 is acting as the transmitter to transmit SL data information to UE2 on SL transmission resources, UE1 may also act as the receiver to receive SL data information transmitted by UE 3. Optionally, at the same time, the UE1 may transmit SFCI to the UE3 on the SL transmission resource, and the detailed description may refer to the above description of the base station scheduling mode of the sidelink SL, which is not described herein.

Optionally, the UE autonomous selection mode may also be referred to as a UE autonomous scheduling mode, or a UE autonomous sensing mode may also be referred to as mode 2(mode 2), and may also be referred to as mode 4(mode 4).

Nine, "and/or"

"and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

In the embodiment of the application, the method is applicable to both homogeneous networks and heterogeneous networks, and meanwhile, the transmission point is not limited, and the method can be used for multi-point cooperative transmission between a macro base station and a macro base station, between a micro base station and a micro base station, and between the macro base station and the micro base station. The application is applicable to both low-frequency scenes (e.g., sub 6G) and high-frequency scenes (more than 6G). It is noted that the term "transmission" referred to in this application may include the transmission and/or reception of data and/or control information. The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, nor order.

For convenience of description, the two terminal devices 120 performing the sidelink communication in fig. 1 may be referred to as a first terminal device and a second terminal device, respectively. And the first terminal device is used as a sending end of the sidelink communication, and the second terminal device is used as a receiving end of the sidelink communication. The first terminal device corresponds to a first BWP, the system parameter of the first BWP is a first system parameter, and the resource pool occupied by the first BWP is a first resource pool. The second terminal device corresponds to a second BWP, the system parameter of the second BWP is a second system parameter, and the resource pool occupied by the second BWP is a second resource pool. If the first terminal device and the second terminal device are guaranteed to perform normal sidelink communication, the following two conditions need to be satisfied between the second BWP and the first BWP:

the first condition is that: the second system parameters of the second BWP are the same as the first system parameters of the first BWP;

the second condition is that: the second resource pool occupied by the second BWP overlaps the first resource pool occupied by the first BWP.

For example, the second resource pool occupied by the second BWP may include a transmission resource pool and/or a reception resource pool, and the first resource pool occupied by the first BWP may include a transmission resource pool and/or a reception resource pool. If the first terminal device sends a sidelink signal or sidelink information to the second terminal device, the second resource pool occupied by the second BWP overlaps with the first resource pool occupied by the first BWP, which may be described as: the transmit resource pool of the first BWP overlaps with the receive resource pool of the second BWP. If the second terminal device feeds back the sidelink signal or the sidelink information to the first terminal device, the second resource pool occupied by the second BWP overlaps with the first resource pool occupied by the first BWP, which may be described as: the transmit resource pool of the second BWP overlaps with the receive resource pool of the first BWP.

It should be noted that, in this embodiment of the present application, the second BWP of the second terminal device and the first BWP of the first terminal device may be configured for the first terminal device and the second terminal device by a network device, where the network device may be a core network device, an access network device, or a mobile device, and this application is not limited thereto. For example, the second BWP and the first BWP may be pre-configured BWPs, the core network device may configure the pre-configured BWPs for the first terminal device and the second terminal device, or the mobile device may store pre-configuration information therein. The second BWP and the first BWP may be dedicated BWPs, and the access network device may configure the dedicated BWPs for the first terminal device and the second terminal device through Radio Resource Control (RRC) dedicated signaling. The second BWP and the first BWP may be a common BWP, and the access network device may configure the common BWP for the first terminal device and the second terminal device through a System Information Block (SIB) or a Master Information Block (MIB). Alternatively, the common BWP may also be referred to as common BWP, the dedicated BWP may also be referred to as truncated BWP, and the pre-configured BWP may also be referred to as pre-configured BWP.

In the embodiment of the present application, in order to achieve the purpose that the sidelink communication can be normally performed between two terminal devices, the following solutions are proposed:

first solution (corresponding to embodiment one): the first terminal device is used as a sending end of the sidelink communication, and the second terminal device is used as a receiving end of the sidelink communication. In the first mode, the second terminal device sends the information of the second BWP to the first terminal device, and then the first terminal device sends the information of the second BWP to the network device. Alternatively, the network device may determine whether the second BWP of the second terminal device and the first BWP of the first terminal device satisfy the condition for the sidelink communication. If not, the first terminal device and/or the second terminal device is reconfigured with BWP satisfying the sidelink communication condition. In the second mode, the first terminal device reports the BWP information to the network device, and the network device determines whether to update the BWP configuration of the terminal device. As to the first or second manner, optionally, the network device may determine whether the second BWP of the second terminal device and the first BWP of the first terminal device satisfy the condition for the sidelink communication. If not, the first terminal device and/or the second terminal device is reconfigured with BWP satisfying the sidelink communication condition. If so, the first terminal device and the second terminal device may directly utilize the configured BWP for the sidelink communication (i.e., the first terminal device utilizes the first BWP and the second terminal device directly utilizes the second BWP for the sidelink communication). The first mode and the second mode are mainly focused on the terminal device and the network device, respectively, and those skilled in the art can understand that the first mode and the second mode may exist as independent schemes or may be combined with each other. In the first solution, the network device can manage time-frequency resources more efficiently, and avoid that too many terminal devices share the same frequency-domain resource.

Second solution (corresponding to example two): the first terminal device serves as a sender of the sidelink communication, and the second terminal device serves as a receiver of the sidelink communication, so that the second terminal device may send the information of the second BWP to the first terminal device, and then the first terminal device determines whether the information of the second BWP of the second terminal device and the information of the first BWP of the first terminal device satisfy the condition of the sidelink communication. Optionally, if the first BWP is not satisfied, the first terminal device sends information of the second BWP to the network device, so that the network device reconfigures the BWP satisfying the sidelink communication condition for the first terminal device and the second terminal device. In the second solution, the first terminal device determines whether to update the BWP configuration of the first terminal device and/or the second terminal device directly according to the information of the first BWP and the information of the second BWP, and compared with the scheme that reports that the network device determines whether to update the BWP configuration by the network device, the method can reduce the interaction flow between the terminal device and the network device, thereby improving the efficiency of the link-by-link communication of the terminal device.

Example one

As shown in fig. 6, a flow of a communication method is provided, in which a terminal device in the flow may be the terminal device 120 shown in fig. 1, and a network device may be the network device 110 shown in fig. 1. It is understood that the functions of the network device may also be implemented by a chip applied to the network device, or by other means to support the network device; the functions of the terminal device may be implemented by a chip applied to the terminal device, or may be implemented by other means to support the terminal device. The process may specifically be:

s601, the second terminal device sends information of a second BWP to the first terminal device, wherein the second BWP is the BWP of the second terminal device for performing the sidelink communication.

S602, the first terminal device sends the information of the second BWP to the network device.

Optionally, as shown in fig. 6, the process may further include: and S603, the network device configures the BWP for at least one of the first terminal device and the second terminal device according to the information of the second BWP and the information of the first BWP. Optionally, in this embodiment of the application, the first terminal device may be in a connected state, where the connected state may be an IC state, an RRC state, or an RRC idle state, and thus the network device may obtain information of the first BWP of the first terminal device. The state of the second terminal device is not limited, for example, the second terminal device may be in an IC state, an OOC state, or an RRC idle state.

For example, the network device may receive information of the second BWP of the second terminal device transmitted by the first terminal device. Meanwhile, since the first terminal device and the network device may perform Uu air interface communication, which represents that the first terminal device is in a connected state, the network device may obtain information of the first BWP of the first terminal device. Further, the network device may determine whether a condition for sidelink communication is satisfied between the second BWP and the first BWP. If not, the network device may configure BWP for at least one of the first terminal device and the second terminal device. If yes, the network device may send a notification message to at least one of the first terminal device and the second terminal device to notify the first terminal device and the second terminal device of the currently configured BWP, so that the sidelink communication may be performed normally. Or, if the first BWP configuration information is satisfied, the network device may not perform any operation, and the first terminal device or the second terminal device exceeds a preset duration after sending the first BWP information, and if the network device reconfiguration BWP message is not received, it is determined that the current BWP configuration may normally perform sidelink communication.

For example, if any one of the following two conditions is satisfied between the second BWP and the first BWP, the first terminal device and the second terminal device may perform normal sidelink communication, and the network device does not need to reconfigure the BWP for at least one of the first terminal device and the second terminal device:

the second condition is that: the resource pool of the first BWP overlaps with the resource pool of the second BWP.

For example, if at least one of the following conditions is satisfied between the second BWP and the first BWP, normal sidelink communication may not be performed between the first terminal device and the second terminal device, and the network device needs to configure the BWP for at least one of the first terminal device and the second terminal device: the system parameters of the second BWP are different from the system parameters of the first BWP; the resource pool of the first BWP is non-overlapping with the resource pool of the second BWP.

For example, the procedure for the network device to configure BWP for at least one of the first terminal device and the second terminal device may be as follows:

the network device configures a third BWP for the first terminal device, and sends configuration information of the third BWP to the first terminal device, and the first terminal device may switch the BWP used by the first terminal device for the sidelink communication from the first BWP to the third BWP according to the configuration information of the third BWP. And/or the presence of a gas in the gas,

the network device configures a fourth BWP for the second terminal device, and sends configuration information of the fourth BWP to the second terminal device, and the second terminal device may switch the BWP used by the second terminal device for the sidelink communication from the second BWP to the fourth BWP according to the configuration information of the fourth BWP.

Optionally, the configuration of the third BWP and the configuration of the first BWP may be independent or dependent, for example, the system parameter configuration of the third BWP and the system parameter configuration of the first BWP may be independent, that is, the system parameter configuration of the third BWP and the system parameter configuration of the first BWP may not be associated; alternatively, the system parameter configuration of the third BWP may be dependent on the system parameter configuration of the first BWP, i.e., the system parameter configuration of the third BWP may be associated with the system parameter configuration of the first BWP. The resource pool included by the third BWP in the frequency domain may be independent or dependent from the resource pool included by the first BWP in the frequency domain. For example, the resource pool included by the third BWP in the frequency domain may be independent from the resource pool included by the first BWP in the frequency domain, that is, the resource pool included by the third BWP in the frequency domain may be not associated with the resource pool included by the first BWP in the frequency domain. Alternatively, the resource pool comprised by the third BWP in the frequency domain may be dependent on the resource pool comprised by the first BWP in the frequency domain, i.e. the resource pool comprised by the third BWP in the frequency domain may be associated with the resource pool comprised by the first BWP in the frequency domain.

Optionally, the configuration of the fourth BWP and the configuration of the second BWP may be independent or dependent, for example, the system parameter configuration of the fourth BWP and the system parameter configuration of the second BWP may be independent, that is, the system parameter configuration of the fourth BWP and the system parameter configuration of the second BWP may not be associated; alternatively, the system parameter configuration of the fourth BWP may be dependent on the system parameter configuration of the second BWP, i.e., the system parameter configuration of the fourth BWP may be associated with the system parameter configuration of the second BWP. The resource pool included by the fourth BWP in the frequency domain may be independent or dependent from the resource pool included by the second BWP in the frequency domain. For example, the resource pool included by the fourth BWP in the frequency domain may be independent from the resource pool included by the second BWP in the frequency domain, that is, the resource pool included by the fourth BWP in the frequency domain may be not associated with the resource pool included by the second BWP in the frequency domain. Alternatively, the resource pool comprised by the fourth BWP in the frequency domain may be dependent on the resource pool comprised by the second BWP in the frequency domain, i.e. the resource pool comprised by the fourth BWP in the frequency domain may be associated with the resource pool comprised by the second BWP in the frequency domain.

Optionally, regarding the flow shown in fig. 6, the method may further include: s600, the first terminal device sends the information of the first BWP to the second terminal device. For example, the first terminal device may send a sidelink request to the second terminal device, where the sidelink request includes information of the first BWP, and the second terminal device may send an authorization and a communication relationship confirmation to the first terminal device after receiving the sidelink request message, where the authorization and the communication relationship confirmation include information of the second BWP. Optionally, the information of the first BWP sent by the first terminal device at least includes information of the reception resource pool included in the first BWP. Accordingly, when the second terminal device receives the information of the receiving resource pool of the first BWP, the second terminal device may determine the sending resource pool of the second BWP of the second terminal device according to the information of the receiving resource pool, for example, it is required to ensure that the receiving resource pool of the first BWP overlaps with the sending resource pool of the second BWP, so as to ensure normal feedback from the second terminal device to the first terminal device.

In the flow shown in fig. 6, the first terminal device is taken as a transmitting terminal device, and the second terminal device is taken as a receiving terminal device, which is not limited in the present application. For example, the second terminal device may be a receiving terminal device, and the first terminal device may be a sending terminal device.

Example 1

As shown in fig. 7, a flow of a communication method is provided, in which the second BWP information in the flow shown in fig. 6 is the configuration information of the second BWP, and the first BWP information is the configuration information of the first BWP, as an example, the flow may be:

and S701, the second terminal equipment sends the configuration information of the second BWP to the first terminal equipment.

S702, the first terminal device sends the configuration information of the second BWP to the network device.

Optionally, the process shown in fig. 7 may further include: and S703, the network device configures the BWP for at least one of the first terminal device and the second terminal device according to the configuration information of the second BWP and the configuration of the first BWP.

The configuration information of the second BWP includes a frame structure parameter of the second BWP, and/or information such as a transmission resource pool and a reception resource pool occupied by the second BWP, and the configuration information of the first BWP includes a frame structure parameter of the first BWP, and/or information such as a transmission resource pool and a reception resource pool occupied by the first BWP, so that the network device may determine whether to configure the BWP for at least one of the first terminal device and the second terminal device according to the configuration information of the second BWP and the configuration information of the first BWP.

Optionally, in the flow shown in fig. 7, the method may further include: s700, the first terminal device sends the configuration information of the first BWP to the second terminal device. For example, the first terminal device may send a sidelink communication request to the second terminal device, where the sidelink communication request includes the configuration information of the first BWP. And after receiving the sidelink communication request sent by the first terminal device, the second terminal device sends authorization and communication relation confirmation to the first terminal device, wherein the authorization and communication relation confirmation comprises the configuration information of the second BWP.

As can be seen from the above, in the embodiment of the present application, the second BWP information sent by the second terminal device is the configuration information of the second BWP, and accordingly, the network device may determine whether to reconfigure the BWP for the first terminal device and/or the second terminal device directly according to the configuration information of the second BWP. Compared with the way that the second terminal device directly sends the identifier of the second terminal device, the network device needs to determine the configuration information of the second BWP according to the identifier of the second terminal device, and the processing complexity of the network device can be reduced.

Example two

As shown in fig. 8, a flow of a communication method is provided, in which the second BWP information of the flow shown in fig. 6 is used as an identifier of the second terminal device, and the information of the first BWP is used as an identifier of the first terminal device, as an example, the flow may be:

s801, the second terminal device sends an identifier of the second terminal device to the first terminal device, wherein the identifier of the second terminal device is associated with a second BWP, and the second BWP is a BWP used by the second terminal device for side-link communication.

S802, the first terminal device sends the identifier of the second terminal device to the network device.

Optionally, the process shown in fig. 8 may further include: s803, the network device determines the configuration information of the second BWP according to the identifier of the second terminal device;

in an example, the network device may determine a connected terminal device, allocate a cell radio network temporary identifier (C-RNTI) to the connected terminal device, and establish a mapping relationship between the C-RNTI of the connected terminal device and the terminal device identifier. After receiving the identifier of the second terminal device, the network device may query the C-RNTI of the second terminal device in the mapping relationship according to the identifier of the second terminal device. And if the C-RNTI of the second terminal equipment is inquired in the mapping relation, the second terminal equipment is in a connected state. The network device may determine configuration information for a second BWP for the second terminal device based on the C-RNTI for the second terminal device. And if the C-RNTI of the second terminal device is not inquired in the mapping relation, the second terminal device is in a non-connected state, and the second BWP of the second terminal device is determined to be the pre-configured BWP or the public BWP.

In an example, the network device may pre-establish a mapping relationship between the identifier of the terminal device and the BWP configuration, and after receiving the identifier of the second terminal device, the network device may query the configuration information of the second BWP corresponding to the identifier of the second terminal device in the mapping relationship. In this example, the identifier of the second terminal device may be, but is not limited to, a layer 2 identifier or a temporary mobile subscriber identifier of the second terminal device. In an example, the identifier of the second terminal device sent by the second terminal device may be a C-RNTI of the second terminal device and a Cell Global Identity (CGI) of the second terminal device. And if the second terminal equipment does not have the resident cell and the C-RNTI, sending a predetermined threshold, wherein the predetermined threshold can be all 0 or all 1, for example. After receiving the identifier of the second terminal device sent by the second terminal device, the network device may determine whether the C-RNTI sent by the second terminal device is a predetermined threshold. If yes, the second terminal device does not have the C-RNTI, the second terminal device is in a non-connected state, and the second BWP of the second terminal device is the pre-configured BWP or the common BWP. And if the C-RNTI sent by the second terminal equipment is not a preset threshold value, the second terminal equipment is in a connected state. Because the second terminal device may be in a connected state with the current network device, or in a connected state with other network devices, the current network device needs to further determine whether the CGI sent by the second terminal device is the same as the CGI of the network device, and if the CGI is the same as the CGI of the network device, the current network device represents that the second terminal device resides in the cell of the network device, and at this time, a second BWP of the second terminal device may be determined according to the C-RNTI of the second terminal device. If not, the second BWP of the network device may be determined to be the pre-configured BWP or the common BWP on behalf of the second terminal device residing within the cells of the other network devices.

Optionally, the process shown in fig. 8 may further include: and S804, the network device configures the BWP for at least one of the first terminal device and the second terminal device according to the configuration information of the second BWP and the configuration information of the first BWP. The first BWP is a BWP for the first terminal device to perform the sidelink communication.

Optionally, in the flow shown in fig. 8, the method may further include: s800, a first terminal device sends an identifier of the first terminal device to a second terminal device, wherein the identifier of the first terminal device is associated with a first BWP of the first terminal device.

Optionally, in the flow shown in fig. 8, the state of the second terminal device may be further associated with a second BWP of the second terminal device. The method may further comprise: and the second terminal equipment sends the state of the second terminal equipment to the first terminal equipment. And the first terminal equipment sends the state of the second terminal equipment to the network equipment. The network device may also determine a second BWP for the second terminal device based on the state of the second terminal device. For example, if the state of the second terminal device is a first state, which may be an OOC state or an idle state, the network device may determine that the second BWP of the second terminal device is a pre-configured BWP or a common BWP. If the state of the second terminal device is the second state, which is the connected state, the network device further needs to determine a second BWP of the second terminal device according to the identifier of the second terminal device.

For example, in this embodiment of the application, the identifier of the terminal device, of the identifier of the first terminal device and the identifier of the second terminal device, may include at least one of a cell radio network temporary identifier (C-RNTI), a layer 2 identifier, a sidelink target identifier, a sidelink source identifier, a temporary mobile subscriber identifier (S-TMSI), an international mobile identity identifier (IMSI), a Global Unique Temporary Identifier (GUTI), and a cell global identity identifier (CGI).

The cell radio network temporary identifier may be an identity identifier for identifying the terminal, and a value of the cell radio network temporary identifier may be 0 to 68838. The layer 2 identifier may refer to an identifier for identifying the terminal by a higher layer, and may be, for example, a Medium Access Control (MAC) layer identifier. The sidelink target identity may refer to a terminal identity of a receiving side of the sidelink communication. Such as the identification corresponding to the terminal that is the target of reception of the sidelink signal. The sidelink source identity may refer to a terminal identity of a transmitting side of the sidelink communication. Such as the identification corresponding to the terminal from which the sidelink signal was transmitted.

As can be seen from the above, in this embodiment of the application, the second BWP information sent by the second terminal device is an identifier of the second terminal device, and compared with the case that the second terminal device directly sends the configuration information of the second BWP, the air interface overhead can be saved.

Example three

As for the flow shown in fig. 6, as shown in fig. 9a or 9b, the present application further provides an application scenario. In this application scenario, the first UE shown in fig. 6 may be UE1, the first BWP may be SL BWP1, UE1 may be IC-state UE, the second UE may be UE2, the second BWP may be SL BWP2, UE2 may be IC-state UE or OCC-state UE, and the network device is a base station. S901 and S902 correspond to the above-described procedure for exchanging BWP information by two terminal devices in fig. 6, and S903 corresponds to the above-described procedure for sending a second BWP to a network device by a first terminal device in fig. 6. S904 corresponds to the above-mentioned process of configuring, by the network device in fig. 6, the BWP for at least one of the first terminal device and the second terminal device according to the information of the first BWP and the information of the second BWP, where the process may be:

s901.UE1 sends a communication request to UE2, where the communication request includes information of SL BWP for UE1 to perform sidelink communication. For convenience of description, the information of SL BWP by the UE1 for sidelink communication may be referred to as information of SL BWP1, and the information of SL BWP1 may be configuration information of SL BWP1 or identification information of the UE 1.

S902.UE2 sends authorization and communication relation confirmation to UE1, including information of SL BWP for UE2 to perform sidelink communication. For convenience of description, the SL BWP in which the UE2 performs sidelink communication may be referred to as information of the SL BWP 2. The information of the SL BWP2 may be configuration information of the SL BWP2 or identification information of the UE 2.

S903.ue1 sends auxiliary information to the base station, where the auxiliary information includes information of SL BWP2, a sidelink service priority, and a size of a sidelink service packet.

S904, the base station determines to reconfigure or not reconfigure SL BWP for the UE1 and the UE2 according to the auxiliary information.

For example, when the system parameters of both SL BWP1 of UE1 and SL BWP2 of UE2 are the same, the bandwidth of BWP may be reconfigured according to the overlapping area of resource pools of BWP1 and BWP2 and the size of the traffic packet, so that the overlapping bandwidth of BWP may be configured to meet the communication requirement of sidelink traffic. If the system parameters of the two are different, the system parameters and bandwidth of the SL BWP1 of the UE1 may be reconfigured according to the system parameters of the SL BWP2 of the UE2, the size of the communication service packet, and other factors. For example, the system parameters of the SL BWP1 of the UE1 may be configured to be the same as the system parameters of the SL BWP2 of the UE2, and the bandwidth of the SL BWP1 of the UE1 may be configured to overlap with the bandwidth of the SL BWP2 of the UE2, so that the communication requirement of the communication traffic packet may be satisfied.

Optionally, if the base station determines to reconfigure the SL BWP for the UE1 and the UE2 according to the assistance information, the process shown in fig. 9a or fig. 9b may further include: s905. the base station reconfigures SL BWP for the UE 1. And/or, s906. the base station reconfigures SL BWP for the UE 2. If the base station determines that the UE1 and the UE2 do not reconfigure the SL BWP according to the assistance information, it is not necessary to perform the above S905 and S906.

If the UE1 operates in the base station scheduling mode, as shown in fig. 9a, the method may further include: s907a.ue1 sends a scheduling request to a base station. S908a, a base station sends a Downlink Control Information (DCI) indication to a UE1, wherein the DCI indication is used for indicating a resource pool used for sidelink communication in the current SL BWP of the UE 1. S909a.ue1 sends the sidelink information to UE2 on the resource pool indicated by the DCI.

If the UE1 operates in the self-scheduling mode, as shown in fig. 9b, it may further include: s907b.ue1 perceives the pool of available resources in the currently configured SL BWP. S908b.ue1 sends sidelink information to UE2 on the pool of perceived available resources.

Note that, in the above example, the UE1 is an IC UE, and the UE2 is an IC UE or an OOC UE. If UE1 and UE2 are both OOC UEs, UE1 and UE2 may operate on a pre-configured BWP or a common BWP for sidelink communications. If the UE1 is an OOC UE and the UE2 is an IC UE, the UE1 may send SL BWP1 of the UE1 to the UE2, and the UE2 forwards the SL BWP1 of the UE1 to the base station, and after the SL BWP1 is forwarded to the base station, the processing procedure of the base station is similar to the above-mentioned flow, and will not be described again here. Alternatively, when UE1 is an OOC UE and UE2 is an IC UE, UE1 and UE2 may operate on a pre-configured BWP or a common BWP for sidelink communications.

Example two

As shown in fig. 10, a flow of a communication method is provided, where a network device in the flow may be the network device 110 in the flow shown in fig. 1, and a terminal device may be the terminal device 120 in the flow shown in fig. 1, and the flow may include:

and S1001, the second terminal equipment sends the configuration information of the second BWP to the first terminal equipment.

And S1002, the first terminal device sends configuration information of a second BWP to the network device according to the configuration information of the second BWP and the configuration information of a first BWP, wherein the first BWP is the BWP used by the first terminal device for the sidelink communication.

For example, the first terminal device may determine whether to reconfigure the BWP for the first terminal device and/or the second terminal device according to the configuration information of the second BWP and the configuration information of the first BWP. If necessary, the configuration information of the second BWP is transmitted to the network device. If not, the following two cases will be described. For the terminal device in the base station scheduling mode, the first terminal device still needs to report the configuration information of the second BWP to the network device to assist the scheduling of the network device. For a terminal device in the UE autonomous selection mode, the first terminal device may not report the configuration information of the second BWP to the network device. As to what conditions the second BWP and the first BWP satisfy, the BWP needs to be reconfigured, which is described in the first embodiment above and will not be described here.

Optionally, the process shown in fig. 10 may further include: and S1003, configuring the BWP for at least one of the first terminal device and the second terminal device by the network device. As to the procedure of configuring BWP for the first terminal device and the second terminal device by the network device, reference may be made to the description in the first embodiment, and a description thereof will not be provided here.

Optionally, in the flow shown in fig. 10, the method may further include: s1000, the first terminal device sends the configuration information of the first BWP to the second terminal device.

Optionally, the first terminal device may further send at least one of a desired system parameter, a desired bandwidth, resource pool configuration information, and a desired scheduling resource pool to the network device. Optionally, the first terminal device may operate in a base station scheduling mode or an autonomous scheduling mode. For example, if the first terminal device is capable of operating in the base station scheduling mode, one or more of the desired system parameters, the desired bandwidth, the resource pool configuration information, and the desired scheduling resource pool may be reported. If the first terminal device is operating in the autonomous scheduling mode, the desired system parameters may be reported. Accordingly, the network device may configure BWP for the first terminal device and/or the second terminal device according to the desired system parameters, bandwidth, resource pool configuration information, scheduling resource pool, and the like, which are sent by the first terminal device. For example, if the system parameter desired by the first terminal device is the second system parameter and the bandwidth is the first bandwidth, the network device may configure the system parameter of the BWP as the second system parameter and configure the bandwidth of the BWP as the first bandwidth when reconfiguring the BWP for the first terminal device and/or the second terminal device. For example, the desired scheduling resource pool is a second resource pool, and when the network device schedules the first terminal device and/or the second terminal device to perform the sidelink communication, the network device may preferentially schedule the second resource pool to perform the sidelink communication for the first terminal device and/or the second terminal device.

EXAMPLE III

As shown in fig. 11, the present application further provides a flow of a communication method, where a network device in the flow may be the network device 110 shown in fig. 1, and a terminal device may be the terminal device 120 shown in fig. 1. For example, with the flow shown in fig. 13, in the first embodiment or the second embodiment, the first terminal device may configure a resource pool set for the sidelink communication for the BWP for the sidelink communication (for example, the first BWP or the third BWP may be configured), and/or configure a scheduling mode for the first terminal device. Alternatively, with the flow shown in fig. 13, in the first or second embodiment, the BWP (for example, the second BWP or the fourth BWP) used by the second terminal device for the sidelink communication may be configured with a resource pool set used for the sidelink communication, and/or a scheduling mode may be configured for the second terminal device. The process illustrated in FIG. 11 may include: s1101, a network device sends a first indication to a terminal device, wherein the first indication is used for indicating a scheduling mode of the terminal device, and/or an available resource pool set in BWP (bwpeer-to-peer) used for side link communication in the mode of the terminal device. Optionally, the first indication may be RRC signaling, a multimedia access control element (MAC CE), Downlink Control Information (DCI), and the like.

S1102, the terminal device determines a scheduling mode of the terminal device according to the first indication, and/or a resource pool set of BWP used for side link communication by the terminal device.

Illustratively, the scheduling mode of the terminal device includes a first scheduling mode or a second scheduling mode. In the first scheduling mode, the resource pool for the sidelink communication in the BWP may be determined as a first resource pool set, and in the second scheduling mode, the resource pool for the sidelink communication in the BWP may be determined as a second resource pool set, where the first resource pool set includes a first number of resource pools, the second resource pool set includes a second number of resource pools, and the first number is the same as or different from the second number. Optionally, the first scheduling mode may also be referred to as: base station scheduling mode, the second scheduling mode may also be referred to as: the UE autonomously selects the mode. It is to be understood that, in the embodiment of the present application, the resource pools included in the first resource pool set and the second resource pool set may be transmission resource pools and/or reception resource pools.

In the base station scheduling mode, the network device may send a DCI signaling to the terminal device at the sending end, where the DCI signaling may be usedOne or more resource pools in the first set of resource pools are indicated for sidelink communications. The terminal equipment at the sending end can send the side link information on the resource pool indicated by the DCI, and the terminal equipment can receive the side link information. For example, if only 1 resource pool can be included in the predefined first set of resource pools, the indication field of the transmission resource pool in the DCI may be set to 0. Alternatively, the first set of resource pools may include N resource pools, where N is a positive integer greater than or equal to 1, and then the indication field of the transmission resource pool in the DCI may be indicated by using N-bit binary bits. For example, the value of N is 3, which represents the resource pools numbered 0, 1, and 2, respectively, if the network device indicates that the resource pools numbered 0 and 1 are used for sidelink communication, the indication field of the sending resource pool of the DCI may be 110, and accordingly, the terminal device performs sidelink data transmission on the

resource pools

0 and 1. Or, the first resource pool set includes M resource pools, where M is a positive integer greater than or equal to 1, and it is set that the terminal device can perform data transmission of the sidelink only on one resource pool, so that the indication field of the transmission resource pool in the DCI may adopt log₂N bits indicate. For example, if N is 4, the network device may use 2 bits to indicate the resource pool.

It should be noted that, in the embodiments of the present application, different embodiments may be used alone or in combination with each other, and the scope of use of different embodiments is not limited.

In the embodiments provided in the present application, the method provided in the embodiments of the present application is introduced from the perspective of a network device, a terminal, and interaction between the network device and the terminal. In order to implement the functions in the method provided by the embodiments of the present application, the network device and the terminal may include a hardware structure and/or a software module, and the functions are implemented in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution.

Similar to the above concept, as shown in fig. 12, an embodiment of the present application further provides an apparatus 1200, where the apparatus 1200 includes a transceiver module 1201 and a processing module 1202.

In an example, the apparatus 1200 is configured to implement the functions of the terminal device in the foregoing method. The apparatus may be a terminal device, or an apparatus in a terminal device. Wherein the apparatus may be a system-on-a-chip. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices.

The transceiver module 1201 is configured to receive information of a second bandwidth portion BWP sent by a second terminal device, where the second BWP is a BWP for the second terminal device to perform sidelink communication; the transceiving module 1201 is further configured to send information of the second BWP to a network device. Optionally, the apparatus 1200 further includes: a processing module 1202, configured to switch, according to configuration information of a third BWP, a BWP used by the first terminal device for the side-link communication from the first BWP to the third BWP, where the third BWP is a BWP configured by the network device for the first terminal device and used for the side-link communication with the second terminal device.

In an example, the apparatus 1200 is used to implement the function of the network device in the foregoing method, and the apparatus may be a network device, and may also be an apparatus in a network device. Wherein the apparatus may be a system-on-a-chip. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices.

The transceiver module 1201 is configured to receive information of a second bandwidth portion BWP sent by a first terminal device, where the second BWP is a BWP for a second terminal device to perform sidelink communication; a processing module 1202, configured to configure BWP for at least one of the first terminal device and the second terminal device according to the information of the second BWP and the information of the first BWP, where the first BWP is the BWP for the first terminal device to perform the sidelink communication.

For specific execution procedures of the processing module 1202 and the transceiver module 1201, reference may be made to the above description in the embodiments. The division of the modules in the embodiments of the present application is schematic, and only one logical function division is provided, and in actual implementation, there may be another division manner, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, may also exist alone physically, or may also be integrated in one module by two or more modules. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

Similar to the above concept, as shown in fig. 13, the embodiment of the present application further provides an apparatus 1300.

In an example, the apparatus 1300 is configured to implement the function of the terminal device in the foregoing method, and the apparatus may be the terminal device, and may also be an apparatus in the terminal device. The apparatus 1300 includes at least one communication interface 1303 for communicating with other devices over a transmission medium, such that the apparatus used in the apparatus 1300 may communicate with other devices. Illustratively, the communication interface 1303 may be a transceiver, circuit, bus, module, or other type of communication interface, which may be a second terminal device or a network device. Illustratively, the communication interface 1303 may receive information of the second bandwidth part BWP sent by the second terminal device, and send the information of the second BWP to the network device. The apparatus 1300 further includes at least one processor 1301 for implementing the functions of the first terminal device in the above method. Illustratively, the processor 1301 is configured to switch, according to configuration information of a third BWP, the BWP used by the first terminal device for the sidelink communication from the first BWP to the third BWP, which is not described herein again specifically with reference to the detailed description of the method. The apparatus 1300 may also include at least one memory 1302 for storing program instructions and/or data. The memory 1302 is coupled to the processor 1301. The coupling in the embodiments of the present application is a spaced coupling or communication connection between devices, units or modules, and may be in an electrical, mechanical or other form, and is used for information interaction between the devices, units or modules. The processor 1301 may operate in conjunction with the memory 1302. Processor 1301 may execute program instructions stored in memory 1302. At least one of the at least one memory may be included in the processor.

In an example, the apparatus 1300 is used to implement the function of the network device in the above method, and the apparatus may be a network device, or an apparatus in a network device. The apparatus 1300 includes at least one processor 1301 for implementing the functionality of the network device in the above method. For example, the processor 1301 may configure BWP for at least one of the first terminal device and the second terminal device according to the information of the second BWP and the information of the first BWP, which is not described herein with reference to the detailed description of the method. The apparatus 1300 may also include at least one memory 1302 for storing program instructions and/or data. The memory 1302 is coupled to the processor 1301. The coupling in the embodiments of the present application is a spaced coupling or communication connection between devices, units or modules, and may be in an electrical, mechanical or other form, and is used for information interaction between the devices, units or modules. The processor 1301 may operate in conjunction with the memory 1302. Processor 1301 may execute program instructions stored in memory 1302. At least one of the at least one memory may be included in the processor. Apparatus 1300 may also include a communication interface 1303 for communicating with other devices over a transmission medium, such that the apparatus used in apparatus 1300 may communicate with other devices. Illustratively, the communication interface 1303 may be a transceiver, circuit, bus, module, or other type of communication interface, which may be the first terminal device or the second terminal device. The processor 1301 transmits and receives data using the communication interface 1303, and is configured to implement the method in the above-described embodiment. Illustratively, the communication interface 1303 may receive the information of the second bandwidth part BWP sent by the first terminal device.

The connection medium between the communication device 1300, the processor 1301, and the memory 1302 is not limited in the embodiment of the present application. In the embodiment of the present application, the memory 1302, the processor 1301, and the communication interface 1303 are connected by a bus 1304 in fig. 13, the bus is represented by a thick line in fig. 13, and the connection manner between other components is only schematically illustrated and is not limited. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in fig. 13, but this does not represent only one bus or one type of bus.

In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

In the embodiment of the present application, the memory may be a nonvolatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory, for example, a random-access memory (RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.

The method provided by the embodiment of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network appliance, a user device, or other programmable apparatus. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disk (DVD)), or a semiconductor medium (e.g., an SSD), among others.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

In the embodiments of the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

Claims

1. A method of communication, comprising:

a first terminal device receives information of a second bandwidth part BWP sent by a second terminal device, wherein the second BWP is the BWP of the second terminal device for performing side link communication;

and the first terminal device sends the information of the second BWP to a network device, so that the network device configures BWP for at least one of the first terminal device and the second terminal device according to the information of the second BWP and the information of the first BWP, and the first BWP is the BWP for the first terminal device to perform the link-by-link communication.

2. The method of claim 1, wherein the method further comprises:

and the first terminal device sends the information of the first BWP to the second terminal device, wherein the first BWP is the BWP of the first terminal device for performing the sidelink communication.

3. The method of claim 1 or 2, wherein the information of the second BWP is configuration information of the second BWP, and the information of the first BWP is configuration information of the first BWP.

4. The method of claim 1 or 2, wherein the information of the second BWP is an identity of the second terminal device, the identity of the second terminal device being associated with the second BWP; the information of the first BWP is an identifier of the first terminal device, and the identifier of the first terminal device is associated with the first BWP.

5. The method of claim 1 or 2, wherein the identification of the second terminal device is associated with the second BWP, comprising: the identity of the second terminal device and the state of the second terminal device are associated with the second BWP, the method further comprising:

the first terminal equipment receives the state of the second terminal equipment sent by the second terminal equipment;

and the first terminal equipment sends the state of the second terminal equipment to the network equipment.

6. The method of claim 1 or 2, wherein the method further comprises:

the first terminal device switches the BWP used by the first terminal device for the sidelink communication from the first BWP to a third BWP according to configuration information of the third BWP, where the third BWP is a BWP configured by the network device for the first terminal device and used for the sidelink communication with the second terminal device.

7. A method of communication, comprising:

the network device receives information of a second bandwidth part BWP sent by the first terminal device, wherein the second BWP is the BWP of the second terminal device for performing side link communication;

and the network device configures the BWP for at least one of the first terminal device and the second terminal device according to the information of the second BWP and the information of the first BWP, where the first BWP is the BWP where the first terminal device performs the sidelink communication.

8. The method of claim 7, wherein the information of the second BWP is configuration information of the second BWP, and the information of the first BWP is configuration information of the first BWP.

9. The method of claim 7, wherein the information of the second BWP is an identity of the second terminal device, the identity of the second terminal device being associated with the second BWP;

the method further comprises the following steps:

and the network equipment determines the configuration information of the second BWP according to the identification of the second terminal equipment.

10. The method of claim 9, wherein the network device determining the configuration information for the second BWP based on the identity of the second terminal device comprises:

the network equipment determines the state of the second terminal equipment according to the identifier of the second terminal equipment;

and the network equipment determines the configuration information of the second BWP according to the state of the second terminal equipment.

11. The method of claim 10, wherein the network device determining the configuration information of the second BWP according to the state of the second terminal device comprises:

when the state of the second terminal device is the first state, determining the configuration information of the second BWP according to the identifier of the second terminal device; alternatively, the first and second electrodes may be,

when the state of the second terminal device is a second state, determining that the configuration information of the second BWP is configuration information of a pre-configured BWP or configuration information of a common BWP.

12. The method of any of claims 9 to 11, wherein the associating of the identity of the second terminal device with the second BWP comprises: the identity of the second terminal device is associated with the second BWP with the state of the second terminal device;

the method further comprises the following steps: and the network equipment receives the state of the second terminal equipment sent by the first terminal equipment.

13. The method according to any of claims 7 to 11, wherein the network device configures BWP for at least one of the first and second terminal devices, comprising:

the network device configures a third BWP for the first terminal device, where the third BWP is a BWP where the first terminal device and the second terminal device perform sidelink communication; and/or the presence of a gas in the gas,

and the network device configures a fourth BWP for the second terminal device, where the fourth BWP is a BWP where the second terminal device performs sidelink communication with the first terminal device.

14. The method according to any of claims 7 to 11, wherein when the network device configures BWP for at least one of the first terminal device and the second terminal device according to the information of the second BWP and the information of the first BWP, at least any of the following conditions is satisfied between the second BWP and the first BWP:

the system parameters of the second BWP are different from the system parameters of the first BWP;

the transmit resource pool of the first BWP does not overlap with the receive resource pool of the second BWP.

15. A communications apparatus, comprising:

a communication interface, configured to receive information of a second bandwidth part BWP sent by a second terminal device, and send the information of the second BWP to a network device, so that the network device configures BWP for at least one of a first terminal device and the second terminal device according to the information of the second BWP and information of a first BWP, where the first BWP is the BWP for the first terminal device to perform side-link communication, and the second BWP is the BWP for the second terminal device to perform side-link communication.

16. The apparatus of claim 15, wherein the communication interface is further to:

and sending information of a first BWP to the second terminal device, wherein the first BWP is the BWP of the first terminal device for performing the link-by-link communication.

17. The apparatus of claim 15 or 16, wherein the information of the second BWP is configuration information of the second BWP, and the information of the first BWP is configuration information of the first BWP.

18. The apparatus of claim 15 or 16, wherein the information of the second BWP is an identity of the second terminal device, the identity of the second terminal device being associated with the second BWP; the information of the first BWP is an identifier of the first terminal device, and the identifier of the first terminal device is associated with the first BWP.

19. The apparatus of claim 15 or 16, wherein the identification of the second terminal device is associated with the second BWP, comprising: the identity of the second terminal device and the state of the second terminal device are associated with the second BWP; the communication interface is further configured to:

20. The apparatus of claim 15 or 16, wherein the apparatus further comprises a processor:

and switching the BWP used by the first terminal device for the sidelink communication from the first BWP to a third BWP according to configuration information of the third BWP, where the third BWP is configured by the network device for the first terminal device and is used for the sidelink communication with the second terminal device.

21. A communications apparatus, comprising:

22. The apparatus of claim 21, wherein the information of the second BWP is configuration information of the second BWP, and the information of the first BWP is configuration information of the first BWP.

23. The apparatus of claim 21, wherein the information of the second BWP is an identification of the second terminal device, the identification of the second terminal device being associated with the second BWP, the processor further configured to:

determining configuration information of the second BWP according to the identity of the second terminal device.

24. The apparatus of claim 23, wherein the processor, when determining the configuration information of the second BWP according to the identifier of the second terminal device, is specifically configured to:

determining the state of the second terminal equipment according to the identifier of the second terminal equipment;

determining configuration information of the second BWP according to the state of the second terminal device.

25. The apparatus of claim 24, wherein the processor, when determining the configuration information of the second BWP according to the state of the second terminal device, is specifically configured to:

26. The apparatus of any of claims 23 to 25, wherein the identification of the second terminal device is associated with the second BWP, comprising: the identity of the second terminal device is associated with the second BWP with the state of the second terminal device; the communication interface is further configured to:

and receiving the state of the second terminal equipment sent by the first terminal equipment.

27. The apparatus of any of claims 21 to 25, wherein the processor, when configuring BWP for at least one of the first and second terminal devices, is specifically configured to:

configuring a third BWP for the first terminal device, wherein the third BWP is a BWP for which the first terminal device and the second terminal device perform side-link communication; and/or the presence of a gas in the gas,

and configuring a fourth BWP for the second terminal device, wherein the fourth BWP is a BWP for which the second terminal device performs side-link communication with the first terminal device.

28. The apparatus according to any of claims 21 to 25, wherein when the processor configures BWP for at least one of the first terminal device and the second terminal device according to the information of the second BWP and the information of the first BWP, at least any of the following conditions is satisfied between the second BWP and the first BWP:

29. A computer-readable storage medium having stored thereon computer instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 14.