Resource switching method and device of sidelink, equipment and storage medium

Abstract

The invention discloses a sidelink resource switching method and device, equipment and a storage medium, and relates to the technical field of communication. The method comprises: a terminal device using a first resource set in a plurality of resource sets for transmission of sidewalk information (1010); in the case where the first condition is satisfied, the terminal device uses a second resource set of the plurality of resource sets for transmission of sidewalk information, the second resource set and the first resource set being different (1020). According to the invention, when the resource set switching condition is satisfied, the terminal device switches the resource set for transmission of sidewalk information, so that one terminal device can support flexible switching among different resource sets, the flexibility of a sidewalk communication system is improved, and normal sidewalk communication among terminals with different capabilities can be ensured.

Description

Sidelink resource switching method, device, equipment and storage medium Technical Field

[0001] The embodiments of the present application relate to the field of communication technology, and in particular to a method, apparatus, device, and storage medium for resource switching of a side link. Background Art

[0002] In current SL (Sidelink) communication technology, the system configures only one sidelink BWP (Bandwidth Part), and all sidelink terminals must support this BWP for transmission / reception. This means that regardless of the terminal's capabilities, they must support the same bandwidth; otherwise, communication between terminals will be impossible. In this case, if a low-capability terminal device, such as a smart bracelet, smartwatch, or wearable device, supports a smaller bandwidth (such as 5MHz), normal-capability terminals (such as those supporting a maximum bandwidth of 20-100MHz) will not be able to communicate normally with the low-capability terminal.

[0003] Summary of the Invention

[0004] The present invention provides a method, apparatus, device, and storage medium for sidelink resource switching. The technical solution is as follows:

[0005] According to one aspect of an embodiment of the present application, a method for sidelink resource switching is provided. The method is performed by a terminal device, where the terminal device is configured with multiple resource sets. The method includes:

[0006] using a first resource set among the plurality of resource sets for transmitting sidelink information;

[0007] When the first condition is met, a second resource set among the multiple resource sets is used for transmitting sidelink information, where the second resource set is different from the first resource set.

[0008] According to one aspect of an embodiment of the present application, a sidelink resource switching device is provided. The device is provided in a terminal device, and the terminal device is configured with multiple resource sets. The device includes:

[0009] a transmission module, configured to use a first resource set among the multiple resource sets for transmitting sidelink information;

[0010] The transmission module is further configured to use a second resource set among the multiple resource sets for transmitting sidelink information when a first condition is met, where the second resource set is different from the first resource set.

[0011] According to one aspect of an embodiment of the present application, a terminal device is provided, comprising a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program to implement the above-mentioned side link resource switching method.

[0012] According to one aspect of an embodiment of the present application, a computer-readable storage medium is provided, in which a computer program is stored. The computer program is used to be executed by a processor to implement the above-mentioned side link resource switching method.

[0013] According to one aspect of an embodiment of the present application, a chip is provided, which includes a programmable logic circuit and / or program instructions. When the chip is running, it is used to implement the above-mentioned resource switching method of the side link.

[0014] According to one aspect of an embodiment of the present application, a computer program product is provided, which includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. A processor reads and executes the computer instructions from the computer-readable storage medium to implement the above-mentioned side link resource switching method.

[0015] The technical solutions provided by the embodiments of the present application may have the following beneficial effects:

[0016] The technical solution provided by the embodiment of the present application is that when the conditions for resource set switching are met, the terminal device switches the resource set for the transmission of side information, so that a terminal device can support flexible switching between different resource sets, thereby improving the flexibility of the side communication system, and at the same time ensuring normal side communication between terminals with different capabilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic diagram of a network architecture provided by an embodiment of the present application;

[0018] FIG2 is a schematic diagram of network coverage inner line communication provided by one embodiment of the present application;

[0019] FIG3 is a schematic diagram of partial network coverage sideline communication provided by an embodiment of the present application;

[0020] FIG4 is a schematic diagram of network coverage outer line communication provided by an embodiment of the present application;

[0021] FIG5 is a schematic diagram of sideline communication with a central control node provided by one embodiment of the present application;

[0022] FIG6 is a schematic diagram of unicast transmission provided by an embodiment of the present application;

[0023] FIG7 is a schematic diagram of multicast transmission provided by an embodiment of the present application;

[0024] FIG8 is a schematic diagram of broadcast transmission provided by an embodiment of the present application;

[0025] FIG9 is a schematic diagram of a time slot structure in NR-V2X provided by an embodiment of the present application;

[0026] FIG10 is a flowchart of a sidelink resource switching method provided by one embodiment of the present application;

[0027] FIG11 is a schematic diagram of the relationship between different frequency domain resource sets provided by an embodiment of the present application;

[0028] FIG12 is a block diagram of a sidelink resource switching apparatus provided by one embodiment of the present application;

[0029] FIG13 is a schematic structural diagram of a terminal device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0031] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. A person skilled in the art will appreciate that, with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0032] Please refer to Figure 1, which shows a schematic diagram of a network architecture provided by an embodiment of the present application. The network architecture may include: a core network 11, an access network 12, and a terminal device 13.

[0033] The core network 11 includes several core network devices. The functions of the core network devices are mainly to provide user connections, user management, and service carrying, and to provide an interface to the external network as a bearer network. For example, the core network of a 5G (5th Generation) NR (New Radio) system may include devices such as an AMF (Access and Mobility Management Function) entity, a UPF (User Plane Function) entity, and an SMF (Session Management Function) entity.

[0034] The access network 12 includes several access network devices 14. The access network in the 5G NR system can be called NG-RAN (New Generation-Radio Access Network). The access network device 14 is a device deployed in the access network 12 to provide wireless communication functions for the terminal device 13. The access network device 14 may include various forms of macro base stations, micro base stations, relay stations, access points, etc. In systems using different wireless access technologies, the names of devices with access network device functions may be different. For example, in the 5G NR system, they are called gNodeB or gNB. With the evolution of communication technology, the name of "access network device" may change. For the convenience of description, in the embodiments of the present application, the above-mentioned devices that provide wireless communication functions for the terminal device 13 are collectively referred to as access network devices.

[0035] The number of terminal devices 13 is usually multiple, and one or more terminal devices 13 can be distributed in the cell managed by each access network device 14. The terminal device 13 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE), mobile stations (MS), etc. For the convenience of description, the devices mentioned above are collectively referred to as terminal devices. The access network device 14 and the core network device communicate with each other through some air technology, such as the NG interface in the 5G NR system. The access network device 14 and the terminal device 13 communicate with each other through some air technology, such as the Uu interface. In this application, "terminal device" and "UE" are usually used interchangeably, but those skilled in the art will understand that the two usually express the same meaning.

[0036] Terminal devices 13 and terminal devices 13 (for example, vehicle-mounted devices and other devices (such as other vehicle-mounted devices, mobile phones, RSU (Road Side Unit), etc.)) can communicate with each other through a direct communication interface (such as a PC5 interface). Accordingly, the communication link established based on the direct communication interface can be called a direct link or SL. SL transmission is the direct communication and data transmission between terminal devices through a side link. Unlike traditional cellular systems in which communication data is received or sent through access network equipment, SL transmission has the characteristics of short delay and low overhead, and is suitable for communication between two terminal devices that are geographically close (such as vehicle-mounted devices and other peripheral devices that are geographically close). It should be noted that in Figure 1, only vehicle-to-vehicle communication in the V2X (vehicle to everything) scenario is used as an example. SL technology can be applied to scenarios where direct communication is carried out between various terminal devices. In other words, the terminal device in this application refers to any device that communicates using SL technology.

[0037] The "5G NR system" in the embodiments of this application may also be referred to as a 5G system or an NR system, but those skilled in the art will understand its meaning. The technical solutions described in the embodiments of this application can be applied to the 5G NR system and can also be applied to subsequent evolution systems of the 5G NR system.

[0038] Before introducing the technical solutions of this application, we first introduce and explain some of the background technologies involved in this application. The following related technologies can be combined with the technical solutions of the embodiments of this application as optional solutions, and they all fall within the scope of protection of the embodiments of this application. The embodiments of this application include at least part of the following contents.

[0039] 1. Sideline communication in different network coverage environments

[0040] In sideline communication, according to the network coverage of the communicating terminal equipment, it can be divided into sideline communication within the network coverage, sideline communication with partial network coverage, and sideline communication outside the network coverage.

[0041] For sideline communications within network coverage, as shown in Figure 2, all terminal devices performing sideline communications are within the coverage of the same access network device (such as a base station). Therefore, the above-mentioned terminal devices can all perform sideline communications based on the same sideline configuration by receiving configuration signaling from the access network device.

[0042] For sidelink communications with partial network coverage, as shown in Figure 3, some terminal devices performing sidelink communications are located within the coverage of the access network device (such as a base station). These terminal devices can receive the configuration signaling of the access network device and perform sidelink communications according to the configuration of the access network device. However, terminal devices located outside the network coverage cannot receive the configuration signaling of the access network device. In this case, the terminal devices outside the network coverage will determine the sidelink configuration based on the pre-configuration information and the information carried in the PSBCH (Physical Sidelink Broadcast Channel) sent by the terminal devices within the network coverage, and perform sidelink communications.

[0043] For sideline communications outside the network coverage, as shown in FIG4 , all terminal devices performing sideline communications are located outside the network coverage, and all terminal devices determine the sideline configuration according to pre-configured information to perform sideline communications.

[0044] For sideline communication with a central control node, as shown in Figure 5, multiple terminal devices (such as UE1, UE2, UE3) constitute a communication group, which has a central control node (such as UE1), also known as CH UE (Cluster Header UE). The central control node (such as UE1) has at least one of the following functions: responsible for establishing the communication group; joining / leaving group members; coordinating resources, allocating sideline transmission resources to other terminals, receiving sideline feedback information from other terminals; coordinating resources with other communication groups, etc.

[0045] 2. D2D / V2X

[0046] Unlike traditional cellular systems, where communication data is received or sent via access network devices (such as base stations), device-to-device communication (D2D) is a sidelink transmission technology based on Direct-to-Device (D2D), resulting in higher spectrum efficiency and lower transmission latency. The IoV system utilizes direct device-to-device communication, with two transmission modes defined by the 3rd Generation Partnership Project (3GPP): Mode A and Mode B.

[0047] Mode A: The access network allocates transmission resources to the terminal device. The terminal device transmits communication data on the sidelink based on the allocated transmission resources. The access network can allocate transmission resources for either single transmissions or semi-static transmissions. As shown in Figure 2, the terminal device is within the network coverage area, and the access network allocates transmission resources for sidelink transmissions.

[0048] Mode B: The terminal device independently selects transmission resources from the resource pool to transmit communication data. Specifically, the terminal device can select transmission resources from the resource pool by listening or by random selection. As shown in Figure 4, the terminal device is outside the network coverage area and autonomously selects transmission resources from the pre-configured resource pool for side transmission; or as shown in Figure 2, the terminal device is within the network coverage area and autonomously selects transmission resources from the network-configured resource pool for side transmission.

[0049] The above-mentioned mode A is called mode 3 in LTE-V2X and mode 1 in NR-V2X; the above-mentioned mode B is called mode 4 in LTE-V2X and mode 2 in NR-V2X.

[0050] 3.NR-V2X

[0051] In NR-V2X, terminal devices need to support autonomous driving functions, which puts higher requirements on data interaction between terminal devices, such as higher throughput, lower latency, higher reliability, larger coverage, and more flexible resource allocation.

[0052] LTE-V2X supports broadcast transmission, while NR-V2X introduces unicast and multicast transmission modes. For unicast transmission, there is only one terminal device at the receiving end. As shown in Figure 6, unicast transmission is performed between UE1 and UE2. For multicast transmission, the receiving end is all terminal devices in a communication group, or all terminal devices within a certain transmission distance. As shown in Figure 7, UE1, UE2, UE3, and UE4 constitute a communication group, where UE1 sends data, and the other terminal devices in the communication group, UE2, UE3, and UE4, are all receiving terminal devices. For broadcast transmission, the receiving end is any terminal device around the sending terminal device. As shown in Figure 8, UE1 is the sending terminal device, and the other terminal devices around it, UE2-UE6, are all receiving terminal devices.

[0053] 4.NR-V2X system frame structure

[0054] The time slot structure in NR-V2X is shown in Figure 9. Sub-figure (a) of Figure 9 shows the time slot structure without the PSFCH (Physical Sidelink Feedback Channel) channel in the time slot; sub-figure (b) of Figure 9 shows the time slot structure with the PSFCH channel included.

[0055] The PSCCH (Pysical Sidelink Control Channel) in NR-V2X starts from the second sidelink symbol of the time slot in the time domain, occupies 2 or 3 OFDM (Orthogonal Frequency Division Multiplexing) symbols, and can occupy {10, 12 15, 20, 25} PRBs (Physical Resource Blocks) in the frequency domain. In order to reduce the complexity of the UE's blind detection of the PSCCH, only one number of PSCCH symbols and PRBs is allowed to be configured in a resource pool. In addition, because the subchannel is the minimum granularity of PSSCH resource allocation in NR-V2X, the number of PRBs occupied by the PSCCH must be less than or equal to the number of PRBs contained in a subchannel in the resource pool to avoid additional restrictions on PSSCH resource selection or allocation. The PSSCH also begins in the time domain with the second sidelink symbol of the timeslot. The last time domain symbol in the timeslot is the GP (guard interval) symbol, and the remaining symbols are mapped to the PSSCH. The first sidelink symbol in the timeslot is a repetition of the second sidelink symbol. The receiving terminal typically uses the first sidelink symbol as an AGC (Automatic Gain Control) symbol; the data on this symbol is not typically used for data demodulation. The PSSCH occupies K subchannels in the frequency domain, each consisting of N consecutive PRBs, as shown in sub-figure (a) of Figure 9.

[0056] When a time slot contains a PSFCH channel, the second to last and third to last symbols in the time slot are used for PSFCH channel transmission, and a time domain symbol before the PSFCH channel is used as a GP symbol, as shown in sub-figure (b) of FIG9 .

[0057] 5.5G unlicensed (licensed-free) spectrum communication NR-U

[0058] Unlicensed spectrum is introduced in the NR system, which is a communication technology used on existing and new licensed spectrum. The NR system can achieve seamless coverage, high spectrum efficiency, high peak rate, and high reliability of the cellular network. In the LTE system, unlicensed spectrum (or unlicensed spectrum) is used as a supplementary frequency band to the licensed spectrum for cellular networks. Similarly, the NR system can also use unlicensed spectrum as part of 5G cellular network technology to provide services to users. The NR system used in unlicensed spectrum is called NR-unlicensed (NR-U).

[0059] The NR-U system supports two networking modes: licensed spectrum-assisted access and unlicensed spectrum-independent access. The former requires the use of licensed spectrum to access the network, with the unlicensed spectrum serving as a secondary carrier. The latter allows independent networking using unlicensed spectrum, allowing UEs to access the network directly. The unlicensed spectrum used by the NR-U system is concentrated in the 5 GHz and 6 GHz bands. With technological evolution, band 46 (5150 MHz to 5925 MHz) has also been newly defined for use as unlicensed spectrum.

[0060] Unlicensed spectrum is a spectrum allocated by countries and regions that can be used for radio equipment communications. This spectrum is generally considered to be a shared spectrum, that is, as long as communication equipment meets the regulatory requirements set by the country or region on this spectrum, it can use this spectrum without applying for exclusive spectrum authorization from the country or region's dedicated spectrum management agency. Since the use of unlicensed spectrum needs to meet the specific regulatory requirements of each country and region, such as communication equipment following the "listen-before-talk" (LBT) principle to use unlicensed spectrum, NR technology needs to be enhanced accordingly to adapt to the regulatory requirements of unlicensed frequency bands, while efficiently utilizing unlicensed spectrum to provide services.

[0061] Please refer to Figure 10, which shows a flow chart of a sidelink resource switching method provided by an embodiment of the present application. The method can be applied to the network architecture shown in Figure 1, for example, the method can be executed by a terminal device. The method may include at least one of the following steps 1010 to 1020:

[0062] Step 1010: The terminal device uses a first resource set among multiple resource sets for transmitting sidelink information.

[0063] In some embodiments, the terminal device is configured with multiple resource sets. In other words, the terminal device is configured with at least two resource sets. The first resource set may be any one of the multiple resource sets.

[0064] In some embodiments, the resource set includes resources for sidelink information transmission.

[0065] In some embodiments, the resource set is a frequency domain resource set (FrequencyResourceSet, referred to as FRS). The frequency domain resource set includes frequency domain resources for sidelink information transmission. In some embodiments, the frequency domain resource set is any one of the following: a resource pool, a BWP (Bandwidth Part, partial bandwidth), a section of frequency domain resources contained in a BWP, a resource block set (RB set), and an interlaced resource block (IRB). Of course, the above is only exemplary and explanatory. The present application does not limit the frequency domain resource set. It can also be other situations besides the above. For example, with the evolution of technology, new concepts for characterizing frequency domain resources are defined, and the present application does not limit this.

[0066] In some embodiments, the resource set is a time domain resource set. The time domain resource set includes time domain resources for sidelink information transmission. In some embodiments, the time domain resource set is a resource pool.

[0067] In addition, in some possible cases, the terminal device may also be configured with a resource set, and the terminal device then uses this resource set for the transmission of sidelink information.

[0068] In some embodiments, one or more resource sets are configured on a sidecarrier resource. For example, one or more frequency domain resource sets are configured on a sidecarrier resource.

[0069] Step 1020: When the first condition is met, the terminal device uses a second resource set among the multiple resource sets for transmitting sidelink information, and the second resource set is different from the first resource set.

[0070] The second resource set can be any one of the multiple resource sets mentioned above, and the second resource set is different from the first resource set. That is, when the first condition is met, the resource set is switched from using the first resource set for transmitting the sidelink information to using the second resource set for transmitting the sidelink information.

[0071] In some embodiments, the first condition includes at least one of the following:

[0072] SL connection is successfully established;

[0073] Receiving instruction information for instructing switching of a resource set;

[0074] The first timer times out;

[0075] The switching resource set is determined according to the service characteristics of the sidelink information to be transmitted.

[0076] In some embodiments, the terminal device uses a first resource set among multiple resource sets for transmitting sidelink information. After successfully establishing the SL connection, the terminal device uses a second resource set among the multiple resource sets for transmitting sidelink information, where the second resource set is different from the first resource set.

[0077] For example, the terminal device is configured with three frequency domain resource sets, namely FRS_1, FRS_2 and FRS_3. The terminal device uses FRS_1 for transmitting sideline information. After successfully establishing the SL connection, the terminal device uses FRS_2 for transmitting sideline information.

[0078] In some embodiments, the terminal device uses a first resource set among multiple resource sets for transmitting sidetrack information. After receiving instruction information for instructing to switch resource sets, the terminal device uses a second resource set among the multiple resource sets for transmitting sidetrack information, where the second resource set is different from the first resource set.

[0079] For example, the terminal device is configured with two frequency domain resource sets, FRS_1 and FRS_2, and the terminal device uses FRS_1 for transmitting sideline information. After receiving the indication information for indicating the switching of resource sets, the terminal device uses FRS_2 for transmitting sideline information.

[0080] Exemplarily, a terminal device is configured with three frequency domain resource sets, namely FRS_1, FRS_2, and FRS_3. The terminal device uses FRS_1 for transmitting sidelink information. After receiving indication information for instructing switching resource sets, the terminal device determines to use FRS_2 for transmitting sidelink information based on the indication information. For example, the indication information for instructing switching resource sets may include indication information for FRS_2.

[0081] In some embodiments, the terminal device uses a first resource set among multiple resource sets for transmitting sidelink information. When the first timer expires, the terminal device uses a second resource set among the multiple resource sets for transmitting sidelink information, where the second resource set is different from the first resource set.

[0082] Exemplarily, the terminal device is configured with two frequency domain resource sets, FRS_1 and FRS_2, and the first timer is assigned a positive integer value K. The terminal device uses FRS_1 for the transmission of side information. When no side information is sent or received on FRS_1, the first timer is decremented according to a certain granularity. Before the first timer is decremented to 0, if the terminal device sends or receives any side information on FRS_1, the first timer is reassigned to K, and then the above decrement steps are repeated. When the first timer is decremented to 0, it switches from FRS_1 to FRS_2, and the terminal device uses FRS_2 for the transmission of side information.

[0083] In some embodiments, a terminal device uses a first resource set from among multiple resource sets for transmitting sidetrack information. If the terminal device determines to switch resource sets based on service characteristics of the sidetrack information to be transmitted, the terminal device uses a second resource set from among the multiple resource sets for transmitting the sidetrack information, where the second resource set is different from the first resource set.

[0084] Exemplarily, a terminal device is configured with three frequency domain resource sets, FRS_1, FRS_2, and FRS_3. The terminal device uses FRS_1 for the transmission of sidelink information. If the terminal device determines to switch to a resource set based on the service characteristics of the sidelink information to be transmitted, the terminal device may select one of the three frequency domain resource sets to switch to, such as FRS_3. The terminal device uses FRS_3 for the transmission of the sidelink information. Optionally, the terminal device may determine which frequency domain resource set to switch to based on the service characteristics of the sidelink information to be transmitted.

[0085] The above describes several conditions that need to be met for switching of resource sets. It should be noted that the above conditions can be implemented separately or in combination. For example, the terminal device uses a first resource set among multiple resource sets for the transmission of side information. After the SL connection is successfully established, if the terminal device receives indication information for indicating the switching of resource sets, the terminal device uses a second resource set among multiple resource sets for the transmission of side information, and the second resource set is different from the first resource set; if the terminal device does not receive indication information for indicating the switching of resource sets, the terminal device continues to use the first resource set for the transmission of side information.

[0086] Several methods for determining the second resource set are introduced below.

[0087] In some embodiments, the terminal device determines to use the second resource set for transmission of sidelink information based on indication information for instructing switching to the second resource set.

[0088] Exemplarily, if the terminal device receives explicit or implicit indication information for instructing switching to the second resource set, the terminal device determines to use the second resource set for transmission of the sidelink information based on the indication information. The indication information can be sent by the network device or by other terminal devices, and this application does not limit this.

[0089] In some embodiments, the terminal device determines to use the second resource set for the transmission of side information based on the attribute information corresponding to the multiple resource sets respectively; wherein the attribute information includes at least one of the following: frequency domain position, frequency domain starting point, and frequency domain bandwidth.

[0090] Exemplarily, the terminal device can select a second resource set to be switched to from the multiple resource sets based on the attribute information corresponding to the multiple resource sets. Optionally, different resource sets can have different attribute information. Exemplarily, the attribute information includes at least one of the following: frequency domain position, frequency domain starting point, frequency domain bandwidth. For example, different resource sets have different frequency domain positions, and / or different frequency domain starting points, and / or different frequency domain bandwidths. The terminal device can select a suitable resource set as the second resource set to be switched to based on actual conditions.

[0091] In some embodiments, the terminal device determines to use the second resource set for transmission of the sidelink information based on the service characteristics of the sidelink information to be transmitted.

[0092] Exemplarily, the terminal device may also determine the second resource set to be switched to based on the service characteristics of the side information to be transmitted. For example, the terminal device selects the second resource set to be switched to from the multiple resource sets based on the service characteristics of the side information to be transmitted and the attribute information corresponding to the multiple resource sets. For example, the terminal device is configured with three frequency domain resource sets, namely FRS_1, FRS_2 and FRS_3. The frequency domain bandwidth of FRS_1 is smaller than the frequency domain bandwidth of FRS_2, and the frequency domain bandwidth of FRS_2 is smaller than the frequency domain bandwidth of FRS_3. The terminal device currently uses FRS_2 for the transmission of side information. Assuming that the service bandwidth demand of the side information to be transmitted by the terminal device increases, the terminal device may determine to switch to using FRS_3 for the transmission of side information.

[0093] In some embodiments, the terminal device determines to use the second resource set for transmission of sidelink information based on default configuration information, and the default configuration information is used to indicate that the second resource set is a default resource set.

[0094] Exemplarily, the terminal device may also determine, based on the default configuration information, the default resource set as the second resource set to be switched to. For example, the terminal device is configured with two frequency domain resource sets, FRS_1 and FRS_2, where FRS_2 is the default resource set. The terminal device currently uses FRS_1 for transmitting sidelink information. When the first timer expires, the terminal device switches to the default resource set FRS_2 for transmitting sidelink information.

[0095] It should be noted that the several methods of determining the second resource set introduced above and the conditions required to switch between the several resource sets can be combined arbitrarily to form a new embodiment. For details, please refer to the exemplary description in the embodiments below.

[0096] In some embodiments, the indication information mentioned above is carried on at least one of the following: first-order SCI or PSCCH, second-order SCI or PSSCH, MAC CE (MAC Control Element, media access layer control unit) signaling, and RRC (Radio Resource Control, radio resource control) signaling.

[0097] In some embodiments, if the first condition is not met, the terminal device continues to use the first resource set for transmitting the sidelink information. The first condition is a condition that the terminal device must meet to switch the resource set. If the first condition is not met, the terminal device does not switch the resource set and continues to use the first resource set for transmitting the sidelink information.

[0098] In some embodiments, when a terminal device determines to switch from a first resource set to a second resource set, it may also transmit first sidelink information, which includes information indicating the second resource set. Optionally, the information indicating the second resource set includes: identification information of the second resource set; and / or information indicating the resource set to be switched. The identification information of the second resource set may include one or more bits. For example, if there are a maximum of eight resource sets, the resource set identification information may be represented by three bits, such as 000, 001, 010, 011, 100, 101, 110, and 111, respectively representing different resource sets. The information indicating the resource set to be switched may be represented by one bit, such as 0 for switching and 1 for not switching, or 1 for switching and 0 for not switching. After switching resource sets, the terminal device transmits the first sidelink information to inform other terminal devices of the resource set it has switched to, allowing other terminal devices to know which resource set it has switched to. This ensures synchronization of resource sets between the terminal device and other terminal devices, and ensures the reliability of sidelink information transmission.

[0099] In addition, the following relationships may exist between different resource sets. (1) There is an inclusion relationship between different resource sets. (2) There is partial overlap between different resource sets. (3) There is no overlap between different resource sets. As shown in Figure 11 (a), FRS_1 includes FRS_2; as shown in Figure 11 (b), there is partial overlap between FRS_1 and FRS_2; as shown in Figure 11 (c), there is no overlap between FRS_1 and FRS_2. Taking the resource set as a frequency domain resource set as an example, if there is an inclusion relationship between the first resource set and the second resource set, no switching time is required when switching from the first resource set to the second resource set; if the first resource set and the second resource set partially overlap or do not overlap, switching time is required when switching from the first resource set to the second resource set. The above switching time can also be called conversion time, which can be represented by τ, τ ≥ 0 microseconds. During the switching time, the terminal device can perform radio frequency debugging, adjustment and alignment of the frequency center point, bandwidth, etc., so that it can correctly transmit and receive on the switched frequency domain resource set.

[0100] In some embodiments, the sidelink information is carried on at least one of the following: S-SSB (Sidelink-Synchronization Signal and PBCH Block), PSCCH, PSSCH, and PSFCH. Among them, S-SSB includes S-PSS (Sidelink-Primary Synchronization Signal), S-SSS (Sidelink-Secondary Synchronization Signal), and PSBCH (Physical Sidelink Broadcast Channel).

[0101] In some embodiments, the above-mentioned resource sets are configured. From the perspective of the terminal device, the network device configures one or more resource sets for the terminal device; from the perspective of the communication system or network device, the network device configures one or more resource sets for use by one or more terminal devices.

[0102] In some embodiments, the resource set is located in a licensed frequency band, a dedicated frequency band (such as an ITS (Intelligent Transportation Systems) dedicated frequency band), or an unlicensed frequency band.

[0103] The technical solution provided by the embodiment of the present application is that when the conditions for resource set switching are met, the terminal device switches the resource set for the transmission of side information, so that a terminal device can support flexible switching between different resource sets, thereby improving the flexibility of the side communication system, and at the same time ensuring normal side communication between terminals with different capabilities.

[0104] In addition, the terminal device can determine whether to switch the resource set based on whether the SL connection is successfully established, or whether the indication information for instructing the switching of the resource set is received, or whether the first timer has timed out, or based on the service characteristics of the side information to be transmitted, thereby selecting a suitable resource set to send or receive the side information, thereby improving the reliability of the side communication.

[0105] Through the technical solution of the present application, the side communication system can adapt to or support low-capability terminals (such as smart bracelets, smart watches, or other wearable devices, etc.) for side communication, and can support terminal devices of different capabilities to support different bandwidths for communication, and can support a terminal device to flexibly switch between different frequency domain resource sets (bandwidths). These designs greatly increase the flexibility of the side communication system, and enable the side communication system to support terminal devices of different capabilities and accelerate the commercialization process of side communication technology.

[0106] In some embodiments, the terminal device determines whether to switch the resource set based on whether the SL connection is successfully established.

[0107] In some embodiments, the terminal device is configured with a resource set, such as a first resource set. The terminal device uses the first resource set for transmitting sideline information. After successfully establishing the SL connection, the terminal device continues to use the first resource set for transmitting sideline information.

[0108] For example, the terminal device is configured with a frequency domain resource set FRS_1, and the terminal device uses FRS_1 for transmitting sideline information. After the SL connection is successfully established, the terminal device continues to use FRS_1 for transmitting sideline information.

[0109] In some embodiments, a terminal device is configured with multiple resource sets. The terminal device uses a first resource set for transmitting sideline information. After successfully establishing a SL connection, the terminal device continues to use the first resource set for transmitting sideline information. Alternatively, after successfully establishing a SL connection, the terminal device switches to using a second resource set for transmitting sideline information, where the second resource set is different from the first resource set.

[0110] For example, a terminal device is configured with the following three frequency resource sets: FRS_1, FRS_2, and FRS_3. The terminal device uses FRS_1 for sideline information transmission. After successfully establishing a SL connection, the terminal device continues to use FRS_1 for sideline information transmission. Alternatively, after successfully establishing a SL connection, the terminal device switches to using FRS_2 or FRS_3 for sideline information transmission.

[0111] Optionally, after successfully establishing the SL connection, the terminal device determines whether to continue using the first resource set for the transmission of side information or switch to other resource sets for the transmission of side information based on the indication information. The above indication information can be pre-configured, or configured by a network device (such as a network device sending it to the terminal device via RRC signaling or DCI), or indicated by other terminal devices (such as other terminal devices sending it to the terminal device via SCI, side RRC signaling or MAC CE signaling), and this application does not limit this.

[0112] Optionally, when the terminal device determines to switch to other resource sets, the specific resource set to be switched to may be pre-configured, configured by the network device, instructed by other terminal devices, or depend on the implementation of the terminal device itself, and this application does not limit this. For example, the terminal device may determine to switch to the use of the second resource set for the transmission of side information based on the indication information sent by the network device or other terminal device to indicate the switch to the second resource set. For another example, the terminal device may determine to use the second resource set for the transmission of side information based on the attribute information corresponding to a plurality of resource sets; wherein the attribute information includes at least one of the following: frequency domain position, frequency domain starting point, and frequency domain bandwidth. For another example, the terminal device may determine to switch to the use of the second resource set for the transmission of side information based on the service characteristics of the side information to be transmitted. For another example, the terminal device determines to switch to the use of the second resource set for the transmission of side information based on the default configuration information.

[0113] In this embodiment, the terminal device determines whether to switch the resource set based on whether the SL connection is successfully established, so that after the terminal device successfully establishes the SL connection, it can choose to switch to another resource set or continue to use the previous resource set.

[0114] In some embodiments, the terminal device determines whether to switch the resource set based on the indication information.

[0115] Exemplarily, the above indication information can be pre-configured, configured by a network device (such as a network device sending it to a terminal device via RRC signaling or DCI), or indicated by other terminal devices (such as other terminal devices sending it to a terminal device via SCI, sidelink RRC signaling or MAC CE signaling). This application does not limit this.

[0116] Exemplarily, the above indication information is used to indicate whether to switch the resource set, and optionally, is also used to indicate the resource set to switch to.

[0117] For example, a terminal device is configured with the following three frequency domain resource sets: FRS_1, FRS_2, and FRS_3. The terminal device uses FRS_1 for sidetrack information transmission. If the terminal device determines not to switch resource sets based on the indication information, it continues to use FRS_1 for sidetrack information transmission. If the terminal device determines to switch resource sets based on the indication information, it uses FRS_2 or FRS_3 for sidetrack information transmission.

[0118] Optionally, when the terminal device determines to switch to other resource sets, the specific resource set to be switched to may be pre-configured, configured by the network device, instructed by other terminal devices, or depend on the implementation of the terminal device itself, and this application does not limit this. For example, if the above-mentioned indication information is also used to indicate switching to the second resource set, the terminal device may determine to switch to using the second resource set for the transmission of side information based on the indication information. For another example, the terminal device may determine to use the second resource set for the transmission of side information based on the attribute information corresponding to a plurality of resource sets; wherein the attribute information includes at least one of the following: frequency domain position, frequency domain starting point, and frequency domain bandwidth. For another example, the terminal device may determine to switch to using the second resource set for the transmission of side information based on the service characteristics of the side information to be transmitted. For another example, the terminal device determines to switch to using the second resource set for the transmission of side information based on the default configuration information.

[0119] In this embodiment, the terminal device determines whether to switch the resource set according to the indication information, so that the terminal device can be flexibly controlled to switch to another resource set or continue to use the previous resource set through the indication information.

[0120] In some embodiments, the terminal device determines whether to switch the resource set based on the first timer.

[0121] The first timer is used to determine whether to switch the resource set. Optionally, the terminal device starts the first timer from the beginning of using a certain resource set. Optionally, the first timer is assigned a positive integer value K. When no side information is sent or received on the resource set, the first timer is decremented according to a certain granularity. Before the first timer is decremented to 0, if the terminal device sends or receives any side information on the resource set, the first timer is reassigned to K, and then the above decrement steps are repeated. When the first timer is decremented to 0, the resource set is switched.

[0122] Optionally, when the terminal device determines to switch to other resource sets, the specific resource set to be switched to may be pre-configured, configured by the network device, instructed by other terminal devices, or depend on the implementation of the terminal device itself, and this application does not limit this. For example, the terminal device determines to use the second resource set for the transmission of side information based on the indication information for instructing the switch to the second resource set. For another example, the terminal device may determine to use the second resource set for the transmission of side information based on the attribute information corresponding to a plurality of resource sets; wherein the attribute information includes at least one of the following: frequency domain position, frequency domain starting point, and frequency domain bandwidth. For another example, the terminal device may determine to switch to the use of the second resource set for the transmission of side information based on the service characteristics of the side information to be transmitted. For another example, the terminal device determines to switch to the use of the second resource set for the transmission of side information based on the default configuration information.

[0123] In this embodiment, the terminal device determines whether to switch the resource set based on the first timer, so that when there is side information being sent or received on a certain resource set in a short period of time, the resource set continues to be used for transmission; when there is no side information being sent or received on a certain resource set for a long time, it switches to other resource sets for transmission.

[0124] In some embodiments, the terminal device determines whether to switch the resource set based on the service characteristics of the sidelink information to be transmitted.

[0125] When multiple frequency domain resource sets are configured, different frequency domain resource sets may be in a relationship of inclusion, partial overlap, or no overlap, and different frequency domain resource sets may occupy frequency domain resource bandwidths of different sizes.

[0126] The terminal device may determine whether to switch the frequency domain resource set based on the service characteristics of the sidelink information to be transmitted. Optionally, the terminal device may further determine which frequency domain resource set to switch to based on the service characteristics.

[0127] Optionally, when determining the switching of the frequency domain resource set, the terminal device may also send a first side information, which includes information for indicating the frequency domain resource set to be switched to. Optionally, the above information for indicating the frequency domain resource set to be switched to includes: identification information of the frequency domain resource set to be switched to; and / or, information for indicating the switching of the frequency domain resource set. For example, there are a maximum of 4 frequency domain resource sets, then the identification information of the frequency domain resource set can be represented by 2 bits, for example, 00, 01, 10, and 11 represent different frequency domain resource sets respectively. The information for indicating the switching of the frequency domain resource set can be represented by 1 bit, such as 0 for switching, 1 for not switching, or 1 for switching, 0 for not switching.

[0128] Of course, when the terminal device determines to switch resource sets based on service characteristics, which resource set to switch to can be pre-configured, configured by the network device, instructed by other terminal devices, or depend on the implementation of the terminal device itself, and this application does not limit this. For example, the terminal device determines to use the second resource set for the transmission of side information based on the indication information for instructing the switch to the second resource set. For another example, the terminal device can determine to use the second resource set for the transmission of side information based on the attribute information corresponding to a plurality of resource sets; wherein the attribute information includes at least one of the following: frequency domain position, frequency domain starting point, and frequency domain bandwidth. For another example, the terminal device can determine to switch to the use of the second resource set for the transmission of side information based on the service characteristics of the side information to be transmitted. For another example, the terminal device determines to switch to the use of the second resource set for the transmission of side information based on the default configuration information.

[0129] In this embodiment, the terminal device determines whether to switch the resource set according to the service characteristics, so that the resource set used by the terminal device can better meet the requirements of the service characteristics.

[0130] The following are device embodiments of the present application, which can be used to implement the method embodiments of the present application. For details not disclosed in the device embodiments of the present application, please refer to the method embodiments of the present application.

[0131] Please refer to Figure 12, which shows a block diagram of a sidelink resource switching device provided by one embodiment of the present application. This device has the functions of implementing the above-mentioned method examples. These functions can be implemented by hardware or by hardware executing corresponding software implementations. This device can be the terminal device described above, or it can be provided in a terminal device. As shown in Figure 12, the device 1200 may include: a transmission module 1210.

[0132] The transmission module 1210 is configured to use a first resource set among the multiple resource sets for transmitting sidelink information.

[0133] The transmission module 1210 is further configured to use a second resource set among the multiple resource sets for transmitting sidelink information when a first condition is met, where the second resource set is different from the first resource set.

[0134] In some embodiments, the first condition includes at least one of the following:

[0135] SL connection is successfully established;

[0136] Receiving instruction information for instructing switching of a resource set;

[0137] The first timer times out;

[0138] The switching resource set is determined according to the service characteristics of the sidelink information to be transmitted.

[0139] In some embodiments, the transmission module 1210 is further configured to:

[0140] Determining, according to the indication information for instructing switching to the second resource set, to use the second resource set for transmitting the sidelink information;

[0141] or,

[0142] Determining, based on attribute information corresponding to each of the multiple resource sets, to use the second resource set for transmitting sidelink information; wherein the attribute information includes at least one of the following: a frequency domain position, a frequency domain starting point, and a frequency domain bandwidth;

[0143] or,

[0144] Determining, based on service characteristics of the sidelink information to be transmitted, to use the second resource set for transmitting the sidelink information;

[0145] or,

[0146] According to default configuration information, it is determined to use the second resource set for transmission of sidelink information, where the default configuration information is used to indicate that the second resource set is a default resource set.

[0147] In some embodiments, the indication information is carried in at least one of the following:

[0148] First-order SCI or PSCCH;

[0149] Second-order SCI or PSSCH;

[0150] MAC CE signaling;

[0151] RRC signaling.

[0152] In some embodiments, the resource set is a frequency domain resource set.

[0153] In some embodiments, the frequency domain resource set is any one of the following:

[0154] Resource pool;

[0155] BWP;

[0156] A frequency domain resource contained in a BWP;

[0157] Resource block collection;

[0158] Comb resource block.

[0159] In some embodiments, the resource set is a time domain resource set.

[0160] In some embodiments, the time domain resource set is a resource pool.

[0161] In some embodiments, the transmission module 1210 is further configured to continue using the first resource set for transmission of sidelink information when the first condition is not met.

[0162] In some embodiments, the transmission module 1210 is further configured to send first sidelink information, where the first sidelink information includes information indicating the second resource set.

[0163] In some embodiments, the information indicating the second resource set includes:

[0164] identification information of the second resource set;

[0165] and / or,

[0166] Information indicating the switching of resource collections.

[0167] In some embodiments,

[0168] There is a containment relationship between different resource collections;

[0169] or,

[0170] There is some overlap between different resource collections;

[0171] or,

[0172] There is no overlap between different resource collections.

[0173] In some embodiments, the side information is carried by at least one of the following:

[0174] S-SSB;

[0175] PSCCH;

[0176] PSSCH;

[0177] PSFCH.

[0178] In some embodiments, the resource set is located in a licensed frequency band, a dedicated frequency band, or an unlicensed frequency band.

[0179] It should be noted that, when the device provided in the above embodiment realizes its function, it only uses the division of the above-mentioned functional modules as an example. In actual application, the above-mentioned functions can be assigned to different functional modules according to actual needs, that is, the content structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0180] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here. For details not described in detail in the embodiment of the device, reference can be made to the above method embodiment.

[0181] Please refer to FIG13 , which shows a schematic diagram of the structure of a terminal device provided by an embodiment of the present application. The terminal device 1300 may include: a processor 1301 , a transceiver 1302 , and a memory 1303 .

[0182] The processor 1301 includes one or more processing cores. The processor 1301 executes various functional applications and information processing by running software programs and modules.

[0183] The transceiver 1302 may include a receiver and a transmitter. For example, the receiver and the transmitter may be implemented as the same wireless communication component, which may include a wireless communication chip and a radio frequency antenna.

[0184] The memory 1303 may be connected to the processor 1301 and the transceiver 1302 .

[0185] The memory 1303 may be used to store a computer program executed by the processor, and the processor 1301 is used to execute the computer program to implement each step in the above method embodiment.

[0186] In an exemplary embodiment, the processor 1301 is used to use a first resource set among the multiple resource sets for the transmission of side information; when a first condition is met, use a second resource set among the multiple resource sets for the transmission of side information, and the second resource set is different from the first resource set.

[0187] For details not described in detail in this embodiment, please refer to the above embodiments and will not be described in detail here.

[0188] In addition, the memory can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic or optical disks, electrically erasable programmable read-only memory, erasable programmable read-only memory, static access memory, read-only memory, magnetic memory, flash memory, and programmable read-only memory.

[0189] An embodiment of the present application also provides a computer-readable storage medium, in which a computer program is stored, and the computer program is used to be executed by a processor to implement the above-mentioned side link resource switching method. Optionally, the computer-readable storage medium may include: ROM (Read-Only Memory), RAM (Random-Access Memory), SSD (Solid State Drives) or an optical disk, etc. Among them, the random access memory may include ReRAM (Resistance Random Access Memory) and DRAM (Dynamic Random Access Memory).

[0190] An embodiment of the present application also provides a chip, which includes a programmable logic circuit and / or program instructions. When the chip is running, it is used to implement the above-mentioned resource reselection method, or implement the above-mentioned side link resource switching method.

[0191] An embodiment of the present application also provides a computer program product, which includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor reads and executes the computer instructions from the computer-readable storage medium to implement the above-mentioned resource reselection method, or implements the above-mentioned side link resource switching method.

[0192] It should be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B.

[0193] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and being indicated, configuration and being configured, etc.

[0194] In some embodiments of the present application, "predefined" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., including a terminal device and a network device), and the present application does not limit the specific implementation method. For example, predefined may refer to information defined in a protocol.

[0195] In some embodiments of the present application, the "protocol" may refer to a standard protocol in the field of communications, for example, it may include an LTE protocol, a NR protocol, and related protocols used in future communication systems, and this application does not limit this.

[0196] In this document, "plurality" refers to two or more. "And / or" describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates an "or" relationship between the associated objects.

[0197] The term “greater than or equal to” mentioned herein may mean greater than or equal to, or greater than, and the term “less than or equal to” may mean less than or equal to, or less than.

[0198] In addition, the step numbers described in this document only illustrate a possible execution order between the steps. In some other embodiments, the above steps may not be executed in the order of the numbers, such as two steps with different numbers are executed at the same time, or two steps with different numbers are executed in the opposite order of the diagram. The embodiments of the present application are not limited to this.

[0199] Those skilled in the art will appreciate that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any media that facilitates the transmission of computer programs from one place to another. The storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0200] The above description is merely an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for switching resources of a sidelink (SL), characterized in that: The method is performed by a terminal device, the terminal device is configured with multiple resource sets, and the method includes: using a first resource set among the plurality of resource sets for transmitting sidelink information; When the first condition is met, a second resource set among the multiple resource sets is used for transmitting sidelink information, where the second resource set is different from the first resource set.

2. The method according to claim 1, characterized in that The first condition includes at least one of the following: SL connection is successfully established; Receiving instruction information for instructing switching of a resource set; The first timer times out; The switching resource set is determined according to the service characteristics of the sidelink information to be transmitted.

3. The method according to claim 1 or 2, characterized in that The using a second resource set among the multiple resource sets for transmitting sidelink information includes: Determining, according to the indication information for instructing switching to the second resource set, to use the second resource set for transmitting the sidelink information; or, Determining, based on attribute information corresponding to each of the multiple resource sets, to use the second resource set for transmitting sidelink information; wherein the attribute information includes at least one of the following: a frequency domain position, a frequency domain starting point, and a frequency domain bandwidth; or, Determining, based on service characteristics of the sidelink information to be transmitted, to use the second resource set for transmitting the sidelink information; or, According to default configuration information, it is determined to use the second resource set for transmission of sidelink information, where the default configuration information is used to indicate that the second resource set is a default resource set.

4. The method according to claim 2 or 3, characterized in that The indication information is carried in at least one of the following: First-order sidelink control information SCI or physical sidelink control channel PSCCH; Second-order SCI or physical sidelink shared channel PSSCH; Media access layer control unit MAC CE signaling; Radio Resource Control (RRC) signaling.

5. The method according to any one of claims 1 to 4, characterized in that The resource set is a frequency domain resource set.

6. The method according to claim 5, characterized in that The frequency domain resource set is any one of the following: Resource pool; Partial bandwidth BWP; A frequency domain resource contained in a BWP; Resource block collection; Comb resource block.

7. The method according to any one of claims 1 to 4, characterized in that The resource set is a time domain resource set.

8. The method according to claim 7, characterized in that The time domain resource set is a resource pool.

9. The method according to any one of claims 1 to 8, characterized in that The method further comprises: If the first condition is not met, continue to use the first resource set for transmitting sidelink information.

10. The method according to any one of claims 1 to 9, characterized in that The method further comprises: First sideline information is sent, where the first sideline information includes information indicating the second resource set.

11. The method according to claim 10, characterized in that The information used to indicate the second resource set includes: identification information of the second resource set; and / or, Information indicating the switching of resource collections.

12. The method according to any one of claims 1 to 11, characterized in that There is a containment relationship between different resource collections; or, There is some overlap between different resource collections; or, There is no overlap between different resource collections.

13. The method according to any one of claims 1 to 12, characterized in that The side information is carried by at least one of the following: Side synchronization signal and broadcast channel block S-SSB; PSCCH; PSSCH; Physical Sideline Feedback Channel PSFCH.

14. The method according to any one of claims 1 to 13, characterized in that The resource set is located in a licensed frequency band, a dedicated frequency band, or an unlicensed frequency band.

15. A resource switching device for a sidelink (SL), characterized in that: The apparatus is provided in a terminal device, the terminal device is configured with a plurality of resource sets, and the apparatus includes: a transmission module, configured to use a first resource set among the multiple resource sets for transmitting sidelink information; The transmission module is further configured to use a second resource set among the multiple resource sets for transmitting sidelink information when a first condition is met, where the second resource set is different from the first resource set.

16. The device according to claim 15, characterized in that The first condition includes at least one of the following: SL connection is successfully established; Receiving instruction information for instructing switching of a resource set; The first timer times out; The switching resource set is determined according to the service characteristics of the sidelink information to be transmitted.

17. The device according to claim 15 or 16, characterized in that The transmission module is further configured to: Determining, according to the indication information for instructing switching to the second resource set, to use the second resource set for transmitting the sidelink information; or, Determining, based on attribute information corresponding to each of the multiple resource sets, to use the second resource set for transmitting sidelink information; wherein the attribute information includes at least one of the following: a frequency domain position, a frequency domain starting point, and a frequency domain bandwidth; or, Determining, based on service characteristics of the sidelink information to be transmitted, to use the second resource set for transmitting the sidelink information; or, According to default configuration information, it is determined to use the second resource set for transmission of sidelink information, where the default configuration information is used to indicate that the second resource set is a default resource set.

18. The device according to claim 16 or 17, characterized in that The indication information is carried in at least one of the following: First-order sidelink control information SCI or physical sidelink control channel PSCCH; Second-order SCI or physical sidelink shared channel PSSCH; Media access layer control unit MAC CE signaling; Radio Resource Control (RRC) signaling.

19. The device according to any one of claims 15 to 18, characterized in that The resource set is a frequency domain resource set.

20. The device according to claim 19, characterized in that The frequency domain resource set is any one of the following: Resource pool; Partial bandwidth BWP; A frequency domain resource contained in a BWP; Resource block collection; Comb resource block.

21. The device according to any one of claims 15 to 18, characterized in that The resource set is a time domain resource set.

22. The device according to claim 21, characterized in that The time domain resource set is a resource pool.

23. The device according to any one of claims 15 to 22, characterized in that The transmission module is further configured to continue using the first resource set for transmitting sidelink information when the first condition is not met.

24. The device according to any one of claims 15 to 23, characterized in that The transmission module is further configured to send first sidelink information, where the first sidelink information includes information indicating the second resource set.

25. The device according to claim 24, characterized in that The information used to indicate the second resource set includes: identification information of the second resource set; and / or, Information indicating the switching of resource collections.

26. The device according to any one of claims 15 to 25, characterized in that There is a containment relationship between different resource collections; or, There is some overlap between different resource collections; or, There is no overlap between different resource collections.

27. The device according to any one of claims 15 to 26, characterized in that The side information is carried by at least one of the following: Side synchronization signal and broadcast channel block S-SSB; PSCCH; PSSCH; Physical Sideline Feedback Channel PSFCH.

28. The device according to any one of claims 15 to 27, characterized in that The resource set is located in a licensed frequency band, a dedicated frequency band, or an unlicensed frequency band.

29. A terminal device, characterized in that: The terminal device includes a processor and a memory, wherein a computer program is stored in the memory, and the processor executes the computer program to implement the method according to any one of claims 1 to 14.

30. A computer-readable storage medium, characterized in that The storage medium stores a computer program, and the computer program is configured to be executed by a processor to implement the method according to any one of claims 1 to 14.

31. A chip, characterized in that: The chip includes a programmable logic circuit and / or program instructions, and when the chip is running, is used to implement the method according to any one of claims 1 to 14.

32. A computer program product, characterized in that The computer program product includes computer instructions, which are stored in a computer-readable storage medium. A processor reads and executes the computer instructions from the computer-readable storage medium to implement the method according to any one of claims 1 to 14.

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