A cell reselection method, device and terminal equipment

Abstract

The application discloses a cell reselection method, device and terminal equipment. In the method, the terminal equipment determines the priority of one or more frequencies according to the configuration information of the sidelink service and the authorization information of the sidelink carrier, and selects a cell for camping according to the priority of the one or more frequencies. Through the method, when there is a sidelink service, the terminal equipment can determine the priority of the frequency providing the sidelink service configuration information based on the configuration information of the sidelink service and whether the carrier provided in the configuration information is on an authorized frequency band, and select a cell for camping based on the frequency priority, which is beneficial to improving the reliability of the terminal equipment when transmitting the sidelink service in the camped cell.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication technology, in particular to a cell reselection method, device and terminal equipment. BACKGROUND

[0002] In a wireless communication network, when a terminal equipment can detect the signal of at least one cell and the signal strength meets certain conditions, the terminal equipment needs to select and camp on a cell. Generally, the terminal equipment will select a cell on the highest priority frequency for camping. When the terminal equipment can directly communicate with the terminal equipment through sidelink (SL), the sidelink traffic transmitted between the terminal equipment and the terminal equipment can affect the frequency priority in cell selection and / or reselection. Therefore, when there is sidelink traffic, how the terminal equipment determines the priority of multiple cells on licensed and unlicensed frequency bands is a problem to be solved. SUMMARY

[0003] The embodiments of the present application provide a cell reselection method, device and terminal equipment. When there is sidelink traffic, the terminal equipment can determine the priority of one or more frequencies respectively based on whether the sidelink traffic configuration information is provided on the one or more frequencies and whether the sidelink carrier provided in the sidelink traffic configuration information is on a licensed frequency band, and select a cell for camping based on the frequency priority, which is beneficial to improve the reliability of the terminal equipment in transmitting sidelink traffic in the camped cell.

[0004] In a first aspect, the embodiments of the present application provide a cell reselection method, which is performed by a terminal equipment. Wherein, the terminal equipment determines the priority of one or more frequencies respectively according to the configuration information of sidelink traffic and the licensed information of sidelink carrier, and selects a cell for camping according to the priority of one or more frequencies. Wherein, the sidelink carrier is the carrier provided in the configuration information of sidelink traffic.

[0005] It can be seen that when there is sidelink traffic, the terminal equipment can determine the priority of the frequency providing the sidelink traffic configuration information based on the configuration information of the sidelink traffic and whether the carrier provided in the configuration information is on a licensed frequency band, and select a cell for camping based on the frequency priority, which is beneficial to improve the reliability of the terminal equipment in transmitting sidelink traffic in the camped cell.

[0006] In an optional implementation, when the terminal device is configured to perform LTE sidelink communication but not NR sidelink communication, the terminal device determines, from the one or more frequencies, configuration information capable of providing LTE sidelink service, and a frequency at which at least one carrier in the LTE sidelink carrier is located on the licensed frequency band has a first priority, which is the highest priority. The terminal device determines, from the one or more frequencies, configuration information capable of providing LTE sidelink service, and a frequency at which there is no carrier located on the licensed frequency band has a second priority, which is lower than the first priority.

[0007] In an optional implementation, when the terminal device is configured to perform NR sidelink communication but not LTE sidelink communication, the terminal device determines, from the one or more frequencies, configuration information capable of providing NR sidelink service, and a frequency at which at least one carrier in the NR sidelink carrier is located on the licensed frequency band has a first priority, which is the highest priority. The terminal device determines, from the one or more frequencies, configuration information capable of providing NR sidelink service, and a frequency at which there is no carrier located on the licensed frequency band has a second priority, which is lower than the first priority.

[0008] In an optional implementation, when the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, the terminal device determines, from the one or more frequencies, configuration information capable of providing NR sidelink service and configuration information capable of providing LTE sidelink service, and a frequency at which at least one carrier in the NR sidelink carrier and at least one carrier in the LTE sidelink carrier is located on the licensed frequency band has a first priority, which is the highest priority. The terminal device determines, from the one or more frequencies, configuration information capable of providing NR sidelink service and configuration information capable of providing LTE sidelink service, and a frequency at which at least one carrier in the NR sidelink carrier is located on the licensed frequency band or at least one carrier in the LTE sidelink carrier is located on the licensed frequency band has a second priority, which is lower than the first priority.

[0009] In an optional implementation, when the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, the terminal device determines, from the one or more frequencies, configuration information capable of providing NR sidelink service and configuration information capable of providing LTE sidelink service, and a frequency at which there is no carrier located on the licensed frequency band in the NR sidelink carrier and in the LTE sidelink carrier has a third priority, which is lower than the second priority.

[0010] In an optional implementation, when the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, the terminal device determines, from the one or more frequencies, configuration information capable of providing NR sidelink service, and a frequency of at least one carrier in the NR sidelink carrier located in a licensed frequency band is of a fourth priority; or,

[0011] When the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, the terminal device determines, from the one or more frequencies, configuration information capable of providing LTE sidelink service, and a frequency of at least one carrier in the LTE sidelink carrier located in a licensed frequency band is of a fourth priority; the fourth priority is lower than the third priority.

[0012] In an optional implementation, when the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, the terminal device determines, from the one or more frequencies, configuration information capable of providing NR sidelink service, and a frequency of at least one carrier in the NR sidelink carrier located in a licensed frequency band is of a fourth priority; or,

[0013] When the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, the terminal device determines, from the one or more frequencies, configuration information capable of providing LTE sidelink service, and a frequency of at least one carrier in the LTE sidelink carrier located in a licensed frequency band is of a fourth priority; the fourth priority is lower than the third priority.

[0014] In an optional implementation, the terminal device receives configuration information of sidelink service and authorization information of sidelink carrier from the network device.

[0015] In an optional implementation, the terminal device selects, according to the priority of the one or more frequencies, a cell with the highest frequency priority to camp on preferentially.

[0016] In a second aspect, an embodiment of the present application provides a communication apparatus, which comprises a processing unit. The processing unit is configured to determine, according to configuration information of sidelink service and authorization information of sidelink carrier, a priority of one or more frequencies respectively, the sidelink carrier being a carrier provided in the configuration information of sidelink service. The processing unit is further configured to select a cell to camp on according to the priority of the one or more frequencies.

[0017] In addition, other optional implementations of the communication apparatus provided in the second aspect can refer to the related content of the first aspect described above, and will not be described in detail here.

[0018] In a third aspect, an embodiment of the present application provides a terminal device, comprising a processor and a memory, the processor and the memory being connected to each other. The memory is configured to store a computer program, the computer program comprising program instructions. The processor is configured to invoke the program instructions and execute the method in the first aspect and any possible implementation thereof.

[0019] In a fourth aspect, an embodiment of the present application provides a chip, comprising a processor and a data interface. The processor reads instructions stored on the memory through the data interface, to execute the method in the first aspect and any possible implementation thereof.

[0020] In a fifth aspect, an embodiment of the present application provides a chip module, comprising the chip provided in the fourth aspect.

[0021] In a sixth aspect, an embodiment of the present application provides a computer readable storage medium, which stores a computer program. The computer program comprises program instructions. When the program instructions are executed by a processor, the processor executes the method in the first aspect and any possible implementation thereof. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. Those skilled in the art can also obtain other drawings according to these drawings without creative effort.

[0023] Figure 1 A schematic diagram of a network architecture provided by an embodiment of the present application;

[0024] Figure 2 A flowchart of a cell reselection method provided by an embodiment of the present application;

[0025] Figure 3 A schematic diagram of a communication device provided by an embodiment of the present application;

[0026] Figure 4 A schematic diagram of a terminal device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0027] 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.

[0028] It should be noted that in the embodiments of the present application, the terms "comprising", "containing" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or further includes elements inherent to such a process, method, article or device. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of other identical elements in the process, method, article or device including the element, in addition, components, features, elements with the same name in different embodiments of the present application can have the same meaning or different meaning, and the specific meaning thereof should be determined according to its explanation in the specific embodiment or further combined with the context in the specific embodiment.

[0029] It should be understood that in the embodiments of the present application, the term "and / or" is only used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this paper represents that the front and rear associated objects are in an "or" relationship.

[0030] It should be understood that in the embodiments of the present application, "multiple" means two or more.

[0031] It should be understood that in the embodiments of the present application, the first, second, etc. description appearing only serves to illustrate and distinguish the description objects, and there is no order, nor does it represent a special limitation on the number of devices in the embodiments of the present application, which cannot constitute any limitation on the embodiments of the present application.

[0032] It should be understood that in the embodiments of the present application, the "connection" appearing means direct connection or indirect connection and various connection modes to realize communication between devices, which is not limited by the embodiments of the present application.

[0033] In a wireless communication network, when a terminal device and a network device communicate, the link between the terminal device and the network device is called uplink (Uplink) or downlink (Downlink), and the corresponding interface is called Uu interface. Among them, the terminal device can also communicate directly with the terminal device, and the link between the terminal device and the terminal device is called sidelink (sidelink, SL), and the corresponding interface is called PC5 interface.

[0034] When the terminal device can detect the signal of at least one cell and the signal strength meets certain conditions, the terminal device needs to select and camp on one cell. It should be understood that the cell is an area covered by a network device or a part of a network device, and the terminal device in this area can communicate with the network device through uplink and downlink. Cell selection / reselection, in general, can also be said to be network device selection / reselection. In general, the terminal device will select the cell on the highest priority frequency to camp. Here, the frequency refers to the frequency of the uplink and / or downlink between the network device and the terminal device, that is, the frequency to which the cell belongs. When the terminal device can directly communicate with the terminal device through sidelink, the sidelink traffic transmitted between the terminal device and the terminal device can affect the frequency priority in cell selection and / or reselection. Therefore, how the terminal device determines the priority of multiple cells when there is sidelink traffic on licensed and unlicensed frequency bands is a problem to be solved.

[0035] To solve the above problems, an embodiment of the present application provides a cell reselection method, in which the terminal device determines the priority of one or more frequencies according to the configuration information of the sidelink traffic and the authorization information of the sidelink carrier, and selects a cell to camp according to the priority of the one or more frequencies. Through this method, when there is sidelink traffic, the terminal device can determine the priority of the frequency providing the sidelink traffic configuration information based on the configuration information of the sidelink traffic and whether the carrier provided in the configuration information is on the licensed frequency band, and select a cell to camp based on the frequency priority, which is beneficial to improve the reliability of the terminal device when transmitting sidelink traffic in the camped cell.

[0036] The technical scheme of the present application can be applied to a fifth generation (5 th Generation,5G) communication system, and can also be applied to a fourth generation (4 th Generation,4G), third generation (3 rd Generation,3G) communication system, and can also be applied to future new communication systems, such as sixth generation (6 th Generation,6G), seventh generation (7 th Generation,7G) and the like, and the embodiments of the present application are not limited thereto.

[0037] The technical scheme of the present application is also applicable to different network architectures, including but not limited to relay network architecture, dual link architecture, vehicle-to-anything communication (Vehicle-to-Everything, V2X) architecture, device-to-device communication (Device-to-Device, D2D) and the like.

[0038] The device in the embodiments of the present application includes a network device and a terminal device.

[0039] The network device in the embodiments of the present application includes a base station and a base station controller of an access network, and can also include a terminal.

[0040] The base station (BS) in the embodiments of the present application, which can also be referred to as a base station device, is a device deployed in a radio access network (RAN) to provide wireless communication functions. For example, the device providing the base station function in the 2G network includes a base transceiver station (BTS), the device providing the base station function in the 3G network includes a node B (NodeB), the device providing the base station function in the 4G network (also referred to as long term evolution (LTE)) includes an evolved node B (eNB), in the wireless local area network (WLAN), the device providing the base station function is an access point (AP), the device providing the base station function in the 5G new radio (NR) is a gNB, and the device providing the base station function in the continuously evolved node B (ng-eNB), wherein the gNB and the terminal communicate with each other by using the NR technology, the ng-eNB and the terminal communicate with each other by using the evolved universal terrestrial radio access (E-UTRA) technology, and the gNB and the ng-eNB can be connected to the 5G core network. The base station in the embodiments of the present application also includes a device providing the base station function in the future new communication system and the like.

[0041] The base station controller in the embodiments of the present application, which can also be referred to as a base station controller device, is a device for managing the base station, for example, a base station controller (BSC) in the 2G network, a radio network controller (RNC) in the 3G network, and can also refer to a device for controlling and managing the base station in the future new communication system.

[0042] The terminal in the embodiments of the present application can also be referred to as a terminal device, which can refer to various forms of user equipment (User Equipment, UE), access terminal, user unit, user station, mobile station, mobile station (Mobile Station, MS), remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent or user equipment. The terminal device can also 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), etc. The embodiments of the present application are not limited thereto.

[0043] For example, Figure 1 A schematic diagram of a network architecture provided by the embodiments of the present application is shown. The network architecture includes one network device and two terminal devices. The uplink and downlink between the network device and the terminal device 1 are shown in Figure 1 , which are used for uplink / downlink data transmission of the terminal device 1. The sidelink between the terminal device 1 and the terminal device 2 is shown in Figure 1 , which is used for sidelink service transmission of the terminal device 1 and the terminal device 2. It should be noted that Figure 1 This is only an example, and the network architecture described in the embodiments of the present application can also include other multiple network devices and terminal devices, as well as uplink / downlink / sidelink between each device, which is not limited in the present embodiment.

[0044] Figure 2 A flowchart of a cell reselection method provided by the embodiments of the present application is shown. The cell reselection method is executed by a terminal device, which includes the following steps:

[0045] 201, the terminal device determines the priority of one or more frequencies according to the configuration information of the sidelink service and the authorization information of the sidelink carrier.

[0046] The sidelink communication configuration information of the sidelink service is related information configured by the network device for the sidelink service of the terminal device, and can include but is not limited to the following information: frequency point information, a transmission / reception resource pool, and transmission / reception configuration parameters. The frequency point information includes one or more frequencies (for example, one or more available frequency points) used by the terminal device to transmit the sidelink service, and a carrier corresponding to each of the one or more frequencies. The carrier corresponding to the frequency is used to carry information transmitted at the frequency. The transmission / reception resource pool includes time-frequency resources for the sidelink service of the terminal device. The transmission / reception configuration parameters include power control, modulation and coding mode parameters and the like for the sidelink service of the terminal device.

[0047] The authorization information of the sidelink carrier is used to indicate whether the sidelink carrier is located in the licensed frequency band or the unlicensed frequency band. The sidelink carrier is a carrier provided in the sidelink service configuration information. For example, the sidelink carrier includes a carrier corresponding to one or more frequencies in the sidelink service configuration information, assuming that the carriers 1-5 are included. The authorization information of the sidelink carrier indicates whether the carriers 1-5 are located in the licensed frequency band, for example, the carriers 1-3 are located in the licensed frequency band, and the carriers 4 and 5 are located in the unlicensed frequency band.

[0048] The licensed frequency band in the embodiments of the present application includes but is not limited to a frequency band used by a licensed operator (for example, a frequency band using a cell uplink frequency band as a sidelink carrier), a frequency band of an intelligent transportation system (ITS), and the like. The unlicensed frequency band includes but is not limited to a frequency band used for Bluetooth communication, a frequency band used for wireless fidelity (WiFi) communication, and the like.

[0049] In a possible implementation, the terminal device receives SIB information (for example, SIB12 / SIB13 / SIB14) from the network device, and the SIB information carries the sidelink service configuration information and the authorization information of the sidelink carrier. The terminal device can obtain from the SIB information that the sidelink carrier used for the sidelink service is located in the licensed frequency band or the unlicensed frequency band, and determine the priority of each of the one or more frequencies. Optionally, the SIB information can only carry the sidelink service configuration information, and not carry the authorization information of the sidelink carrier. That is, in this case, the network does not provide the authorization information of the sidelink carrier.

[0050] The sidelink service of the terminal device can include, but is not limited to, LTE sidelink communication, NR sidelink communication, V2X sidelink communication, and the like. In the embodiments of the present application, LTE sidelink communication and NR sidelink communication are mainly taken as examples for description, and the cell reselection method provided by the embodiments of the present application is not limited to be applicable to LTE sidelink communication and NR sidelink communication.

[0051] In a possible implementation, when the terminal device is configured to perform LTE sidelink communication but not to perform NR sidelink communication, the terminal device determines the priority of one or more frequencies according to the configuration information of the sidelink service and the authorization information of the sidelink carrier, and the specific process includes the following steps:

[0052] A. The terminal device determines the priority of the frequency from the one or more frequencies, according to the configuration information of the LTE sidelink service, and the priority of the frequency on which at least one carrier in the LTE sidelink carrier is located on the licensed frequency band is the first priority, and the first priority is the highest priority.

[0053] B. The terminal device determines the priority of the frequency from the one or more frequencies, according to the configuration information of the LTE sidelink service, and the priority of the frequency on which no carrier in the LTE sidelink carrier is located on the licensed frequency band is the second priority, and the second priority is lower than the first priority.

[0054] The terminal device receives the configuration information of the sidelink service from the network device, the configuration information of the sidelink service includes the configuration information of the LTE sidelink service, and at least one carrier in the LTE sidelink carrier provided in the configuration information of the LTE sidelink service is located on the licensed frequency band. Then the terminal device determines that the priority of the frequency of the network device is the highest priority. Optionally, the terminal device receives the configuration information of the sidelink service from the network device, the configuration information of the sidelink service includes the configuration information of the LTE sidelink service, and no carrier in the LTE sidelink carrier provided in the configuration information of the LTE sidelink service is located on the licensed frequency band (i.e., the carrier is located on the unlicensed frequency band), and the terminal device determines that the priority of the frequency of the network device is the second priority.

[0055] For example, cell 1 belongs to network device 1, and cell 2 belongs to network device 2. Cell 1 and cell 2 cover respective areas through frequency 1 and frequency 2, respectively, and terminal device 1 can simultaneously detect cell 1 and cell 2. Terminal device 1 receives sidelink service configuration information 1 from network device 1, and the sidelink service configuration information 1 provides LTE sidelink service configuration information, which indicates that frequency 1 can provide the LTE sidelink service configuration information. Assuming that the LTE sidelink carriers provided in the sidelink service configuration information 1 include carriers 1-5, where carrier 1 is located on a licensed frequency band, and carriers 2-5 are located on an unlicensed frequency band, the terminal device determines that the priority of frequency 1 is the highest priority. Terminal device 1 receives sidelink service configuration information 2 from network device 2, and the sidelink service configuration information 2 provides LTE sidelink service configuration information, which indicates that frequency 2 can also provide the LTE sidelink service configuration information. Assuming that the LTE sidelink carriers provided in the LTE sidelink service configuration information include carriers 2-5, where carriers 2-5 are all located on the unlicensed frequency band. The terminal device determines that the priority of frequency 2 is the second priority.

[0056] In a possible implementation, when the terminal device is configured to perform NR sidelink communication but not LTE sidelink communication, the terminal device determines the priority of one or more frequencies according to the sidelink service configuration information and the licensed information of the sidelink carrier, and specifically includes the following processes:

[0057] A. The terminal device determines, from the one or more frequencies, a frequency that can provide NR sidelink service configuration information and has at least one carrier in the NR sidelink carrier located on a licensed frequency band, and the priority of the frequency is the first priority, and the first priority is the highest priority.

[0058] B. The terminal device determines, from the one or more frequencies, a frequency that can provide NR sidelink service configuration information and has no carrier located on a licensed frequency band in the NR sidelink carrier, and the priority of the frequency is the second priority, and the second priority is lower than the first priority.

[0059] Similar to the case in the above LTE sidelink service, the terminal device receives the configuration information of the sidelink service from the network device, which includes the configuration information of the NR sidelink service, and at least one of the NR sidelink carriers provided in the configuration information of the NR sidelink service is located on the licensed frequency band. Then the terminal device determines that the priority of the frequency of the network device is the highest priority. Optionally, the terminal device receives the configuration information of the sidelink service from the network device, which includes the configuration information of the NR sidelink service, and none of the NR sidelink carriers provided in the configuration information of the NR sidelink service is located on the licensed frequency band (i.e., all the carriers are located on the unlicensed frequency band), and the terminal device determines that the priority of the frequency of the network device is the second priority.

[0060] In a possible implementation, when the terminal device is configured to perform LTE sidelink communication and NR sidelink communication, the terminal device determines the priority of one or more frequencies according to the configuration information of the sidelink service and the authorization information of the sidelink carrier, specifically including the following processes:

[0061] A. The terminal device determines from one or more frequencies that the configuration information of the NR sidelink service and the configuration information of the LTE sidelink service can be provided, and the priority of the frequency on which at least one of the NR sidelink carrier and the LTE sidelink carrier is located on the licensed frequency band is the first priority, and the first priority is the highest priority.

[0062] B. The terminal device determines from one or more frequencies that the configuration information of the NR sidelink service and the configuration information of the LTE sidelink service can be provided, and the priority of the frequency on which at least one of the NR sidelink carrier is located on the licensed frequency band or at least one of the LTE sidelink carrier is located on the licensed frequency band is the second priority, and the second priority is lower than the first priority.

[0063] In the configuration information of the sidelink service received by the terminal device from the network device, the configuration information of the LTE sidelink service and the configuration information of the NR sidelink service are included, at least one of the LTE sidelink carriers provided in the configuration information of the LTE sidelink service is located on the licensed frequency band, and at least one of the NR sidelink carriers provided in the configuration information of the NR sidelink service is located on the licensed frequency band. The terminal device determines that the frequency of the network device has the highest priority. Alternatively, in the configuration information of the sidelink service received by the terminal device from the network device, the configuration information of the LTE sidelink service and the configuration information of the NR sidelink service are included, and at least one of the NR sidelink carriers provided in the configuration information of the NR sidelink service or at least one of the LTE sidelink carriers provided in the configuration information of the LTE sidelink service is located on the licensed frequency band. The terminal device determines that the frequency of the network device has the second priority.

[0064] For example, cell 1 belongs to network device 1, and cell 2 belongs to network device 2. Cell 1 and cell 2 cover respective areas through frequency 1 and frequency 2, respectively, and terminal device 1 can simultaneously detect cell 1 and cell 2. In the configuration information 1 of the sidelink service received by terminal device 1 from network device 1, the configuration information of the LTE sidelink service and the configuration information of the NR sidelink service are provided, indicating that frequency 1 can provide the configuration information of the LTE sidelink service and the configuration information of the NR sidelink service. Assuming that the LTE sidelink carriers provided in the configuration information 1 of the sidelink service include carriers 1-3, and the NR sidelink carriers provided include carriers 4 and 5, carrier 1 and carrier 4 are located on the licensed frequency band, and carriers 2, 3, and 5 are located on the unlicensed frequency band. The terminal device determines that the priority of frequency 1 is the highest priority. In the configuration information 2 of the sidelink service received by terminal device 1 from network device 2, the configuration information of the LTE sidelink service and the configuration information of the NR sidelink service are provided. Assuming that the LTE sidelink carriers provided in the configuration information 2 of the sidelink service include carriers 1-4, and the NR sidelink carriers provided include carriers 5-7, carrier 1 is located on the licensed frequency band, and carriers 2-7 are located on the unlicensed frequency band. The terminal device determines that the priority of frequency 2 is the second priority.

[0065] In a possible implementation, when the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, the terminal device determines, from one or more frequencies, configuration information capable of providing NR sidelink service and configuration information capable of providing LTE sidelink service, and the priority of the frequency of the carrier located in the licensed frequency band in the NR sidelink carrier and the LTE sidelink carrier is the third priority, which is lower than the second priority. That is, although the network can provide the configuration information capable of providing the NR sidelink service and the configuration information capable of providing the LTE sidelink service, the sidelink carriers provided in the configuration information are all located in the unlicensed frequency band, and the priority of the frequency of the network device is low.

[0066] For example, the terminal device receives the configuration information of the sidelink service from the network device, and the configuration information of the sidelink service provides the configuration information of the LTE sidelink service and the configuration information of the NR sidelink service, which indicates that the frequency 1 can provide the configuration information of the LTE sidelink service and the configuration information of the NR sidelink service. It is assumed that the LTE sidelink carrier provided in the configuration information of the sidelink service includes the carrier 1-3, and the NR sidelink carrier provided includes the carrier 4 and the carrier 5. Wherein, the carriers 1-5 are all located in the unlicensed frequency band. That is, the sidelink carriers provided in the configuration information of the sidelink service are all located in the unlicensed frequency band, and the terminal device determines that the priority of the frequency 1 is the third priority.

[0067] In a possible implementation, when the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, the terminal device determines, from one or more frequencies, configuration information capable of providing NR sidelink service and configuration information capable of providing LTE sidelink service, and the priority of the frequency of the carrier located in the licensed frequency band in the NR sidelink carrier and the LTE sidelink carrier is the third priority, which is lower than the second priority. That is, although the network can provide the configuration information capable of providing the NR sidelink service and the configuration information capable of providing the LTE sidelink service, the sidelink carriers provided in the configuration information are all located in the unlicensed frequency band, and the priority of the frequency of the network device is low.

[0068] Optionally, when the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, the terminal device determines, from one or more frequencies, configuration information capable of providing LTE sidelink service, and the priority of the frequency of the carrier located in the licensed frequency band in the LTE sidelink carrier is the fourth priority.

[0069] That is, in the above possible implementation, the configuration information of the sidelink service received by the terminal device only includes one kind of configuration information of sidelink service, and the frequency of the sidelink carrier provided in the one kind of configuration information of sidelink service has the fourth priority, where at least one carrier in the sidelink carrier is located in the licensed frequency band. For example, the terminal device receives the configuration information of sidelink service from the network device, and the configuration information of sidelink service includes the configuration information of LTE sidelink service, which indicates that the frequency 1 of the network device can provide the configuration information of LTE sidelink service. Assuming that the LTE sidelink carrier provided in the configuration information of sidelink service includes carriers 1-3, where carrier 1 is located in the licensed frequency band, and carriers 2 and 3 are located in the unlicensed frequency band, the terminal device determines that the priority of the frequency 1 is the fourth priority.

[0070] In a possible implementation, when the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, the terminal device determines, from the one or more frequencies, a frequency capable of providing the configuration information of NR sidelink service, and the frequency of the NR sidelink carrier in which no carrier is located in the licensed frequency band has the fifth priority. Wherein the fifth priority is lower than the fourth priority.

[0071] Optionally, when the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, the terminal device determines, from the one or more frequencies, a frequency capable of providing the configuration information of LTE sidelink service, and the frequency of the LTE sidelink carrier in which no carrier is located in the licensed frequency band has the fifth priority.

[0072] That is, in the above possible implementation, the configuration information of the sidelink service received by the terminal device only includes one kind of configuration information of sidelink service, and the frequency of the sidelink carrier provided in the one kind of configuration information of sidelink service has the fifth priority, where no carrier in the sidelink carrier is located in the licensed frequency band. For example, the terminal device receives the configuration information of sidelink service from the network device, and the configuration information of sidelink service provides the configuration information of LTE sidelink service, which indicates that the frequency 1 of the network device can provide the configuration information of LTE sidelink service. Assuming that the LTE sidelink carrier provided in the configuration information of sidelink service includes carriers 1-3, where carriers 1-3 are all located in the unlicensed frequency band, the terminal device determines that the priority of the frequency 1 is the fifth priority.

[0073] In a possible implementation, before step 201, the terminal device receives the configuration information of sidelink service and the authorization information of sidelink carrier from the network device. That is, the configuration information of sidelink service and the authorization information of sidelink carrier are information sent by the network side to the terminal device.

[0074] 202, the terminal device selects a cell to camp on according to the priority of one or more frequencies.

[0075] In the embodiments of the present application, the cell reselection procedure can be summarized as the following two procedures: determining whether to start measurement on a neighbor cell and cell reselection decision. The terminal device determines whether to start measurement on a neighbor cell, which can be divided into the following cases:

[0076] Case one: when the frequency priority of the serving cell of the terminal device is lower than the frequency priority of the neighbor cell, the terminal device can perform measurement on the neighbor cell with high priority.

[0077] Case two: when the frequency priority of the serving cell of the terminal device is the same as the frequency priority of the neighbor cell, if the measurement value of the serving cell of the terminal device is less than or equal to the intra-frequency measurement threshold / non-intra-frequency (inter-frequency) measurement threshold of the serving cell, the terminal device can perform measurement on the neighbor cell. Otherwise, if the measurement value of the serving cell of the terminal device is greater than the intra-frequency measurement threshold / non-intra-frequency (inter-frequency) measurement threshold of the serving cell, the terminal device does not perform measurement on the neighbor cell.

[0078] Case three: when the frequency priority of the serving cell of the terminal device is higher than the frequency priority of the neighbor cell, if the Reference Signal Receiving Power (RSRP) value of the serving cell of the terminal device is less than or equal to the intra-frequency measurement threshold, the terminal device can perform measurement on the neighbor cell. Otherwise, if the RSRP value of the serving cell of the terminal device is greater than the intra-frequency measurement threshold, the terminal device does not perform measurement on the neighbor cell.

[0079] When the terminal device performs measurement on the neighbor cell and obtains the measurement result of the neighbor cell, the terminal device can perform cell reselection decision. In the embodiments of the present application, the cell reselection decision mainly adopts the following criteria:

[0080] Criterion one: if there are multiple neighbor cells on the frequency with the highest priority that meet the conditions, the terminal device selects the optimal cell on the frequency with the highest priority. For example, the optimal cell on the frequency with the highest priority can be the cell with the largest RSRP value on the frequency with the highest priority.

[0081] Criterion two: for the frequencies (or intra-frequencies) with the same priority, the terminal device adopts the R criterion for intra-frequency cell reselection. That is, when there are multiple cells on a frequency, the cells are sorted according to the signal strength according to the R criterion. The terminal device selects the cell with the largest signal strength based on the sorted cells.

[0082] In a possible implementation, the terminal device selects a cell with the highest frequency priority to camp on in priority according to the priority of one or more frequencies. That is, the terminal device selects a cell with the highest frequency priority to camp on in priority when performing cell reselection. If there are multiple cells on the frequency with the highest frequency priority, the terminal device selects a cell with the highest signal strength on the frequency with the highest frequency priority to camp on in priority according to the signal strength of each cell.

[0083] The embodiment of the present application provides a cell reselection method, in which a terminal device determines the priority of one or more frequencies respectively according to configuration information of sidelink service and authorization information of a sidelink carrier, and selects a cell to camp on according to the priority of the one or more frequencies. By using the method, when there is sidelink service, the terminal device can determine the priority of a frequency providing the configuration information of the sidelink service based on the configuration information of the sidelink service and whether the carrier provided in the configuration information is on an authorized frequency band, and select a cell to camp on based on the priority of the frequency, thereby improving the reliability of the terminal device when transmitting sidelink service in the camped cell.

[0084] The apparatus and the terminal device related to the embodiment of the present application are described in detail below.

[0085] Figure 3 A schematic diagram of a communication apparatus provided by the embodiment of the present application is shown in FIG. 3. The communication apparatus 300 includes a processing unit 301 and a transceiver unit 302. The processing unit 301 is configured to determine the priority of one or more frequencies respectively according to the configuration information of sidelink service and the authorization information of a sidelink carrier. The sidelink carrier is a carrier provided in the configuration information of sidelink service. The processing unit 301 is further configured to select a cell to camp on according to the priority of the one or more frequencies.

[0086] In a possible implementation, when the terminal device is configured to perform LTE sidelink communication but not NR sidelink communication, the processing unit 301 is configured to determine a frequency capable of providing configuration information of LTE sidelink service from the one or more frequencies, and the priority of the frequency on which at least one carrier in the LTE sidelink carrier is located on an authorized frequency band is a first priority, and the first priority is the highest priority. The processing unit 301 is further configured to determine a frequency capable of providing configuration information of LTE sidelink service from the one or more frequencies, and the priority of the frequency on which no carrier in the LTE sidelink carrier is located on an authorized frequency band is a second priority, and the second priority is lower than the first priority.

[0087] In a possible implementation, when the terminal device is configured to perform the NR sidelink communication but not the LTE sidelink communication, the processing unit 301 is configured to determine, from the one or more frequencies, the configuration information capable of providing the NR sidelink service, and a frequency at which there is at least one carrier in the NR sidelink carrier located on the licensed frequency band has a first priority, the first priority being the highest priority. The processing unit 301 is further configured to determine, from the one or more frequencies, the configuration information capable of providing the NR sidelink service, and a frequency at which there is no carrier located on the licensed frequency band has a second priority, the second priority being lower than the first priority.

[0088] In a possible implementation, when the terminal device is configured to perform the NR sidelink communication and the LTE sidelink communication, the processing unit 301 is configured to determine, from the one or more frequencies, the configuration information capable of providing the NR sidelink service and the configuration information capable of providing the LTE sidelink service, and a frequency at which there is at least one carrier in the NR sidelink carrier and the LTE sidelink carrier located on the licensed frequency band has a first priority, the first priority being the highest priority. The processing unit 301 is further configured to determine, from the one or more frequencies, the configuration information capable of providing the NR sidelink service and the configuration information capable of providing the LTE sidelink service, and a frequency at which there is at least one carrier in the NR sidelink carrier located on the licensed frequency band or at least one carrier in the LTE sidelink carrier located on the licensed frequency band has a second priority, the second priority being lower than the first priority.

[0089] In a possible implementation, when the terminal device is configured to perform the NR sidelink communication and the LTE sidelink communication, the processing unit 301 is further configured to determine, from the one or more frequencies, the configuration information capable of providing the NR sidelink service and the configuration information capable of providing the LTE sidelink service, and a frequency at which there is no carrier located on the licensed frequency band in the NR sidelink carrier and the LTE sidelink carrier has a third priority, the third priority being lower than the second priority.

[0090] In a possible implementation, when the terminal device is configured to perform the NR sidelink communication and the LTE sidelink communication, the processing unit 301 is further configured to determine, from the one or more frequencies, the configuration information capable of providing the NR sidelink service, and a frequency at which there is at least one carrier in the NR sidelink carrier located on the licensed frequency band has a fourth priority, the fourth priority being lower than the third priority.

[0091] In a possible implementation, when the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, the processing unit 301 is further configured to determine, from the one or more frequencies, configuration information capable of providing LTE sidelink service, and a frequency of a carrier in the LTE sidelink carrier located in a licensed frequency band is of a fourth priority.

[0092] In a possible implementation, when the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, the processing unit 301 is further configured to determine, from the one or more frequencies, configuration information capable of providing NR sidelink service, and a frequency of a carrier in the NR sidelink carrier located in a licensed frequency band is of a fifth priority.

[0093] In a possible implementation, when the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, the processing unit 301 is further configured to determine, from the one or more frequencies, configuration information capable of providing LTE sidelink service, and a frequency of a carrier in the LTE sidelink carrier located in a licensed frequency band is of a fifth priority.

[0094] In a possible implementation, the transceiver 302 is configured to receive, from the network device, configuration information of sidelink service and licensed information of sidelink carrier.

[0095] In a possible implementation, the processing unit 301 is further configured to select, according to the priorities of the one or more frequencies, a cell with the highest frequency priority as a cell for camping.

[0096] In the above possible implementation, specific contents can be referred to the corresponding steps of the above method embodiments, and will not be described here in detail.

[0097] Figure 4 A structural schematic diagram of a terminal device provided by an embodiment of the present application is shown in FIG. 4. The terminal device 400 includes a processor 401 and a memory 402, and the processor 401 and the memory 402 are connected through one or more communication buses.

[0098] The processor 401 can be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like. The general-purpose processor can be a microprocessor or the processor can be any conventional processor.

[0099] The memory can be a volatile memory or a nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile memory can be a read-only memory (ROM), a programmable ROM (PROM), an erasable PROM (EPROM), an electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM) used as an external cache. By way of example, and not limitation, many forms of random access memory (RAM) can be used, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous dynamic RAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and direct Rambus RAM (DR RAM).

[0100] The processor 401 is configured to support the terminal device to perform Figure 2The terminal device corresponds to the functions in the illustrated cell reselection method. The above-mentioned memory 402 can include read-only memory and random access memory, and provide the processor 401 with computer programs and data. Part of the memory 402 can also include non-volatile random access memory. Wherein, the processor 401 invokes the computer program to execute:

[0101] According to the configuration information of the sidelink service and the authorization information of the sidelink carrier, determine the priority of one or more frequencies respectively, and the sidelink carrier is the carrier provided in the configuration information of the sidelink service;

[0102] According to the priority of one or more frequencies, select a cell for camping.

[0103] In a possible implementation, the processor 401 invokes the computer program to execute:

[0104] When the terminal device is configured to perform LTE sidelink communication but not to perform NR sidelink communication, determine from one or more frequencies that can provide configuration information of LTE sidelink service, and the priority of the frequency on which at least one carrier in the LTE sidelink carrier is located in the licensed frequency band is the first priority, and the first priority is the highest priority;

[0105] Determine from one or more frequencies that can provide configuration information of LTE sidelink service, and the priority of the frequency on which there is no carrier located in the licensed frequency band in the LTE sidelink carrier is the second priority, and the second priority is lower than the first priority.

[0106] In a possible implementation, the processor 401 invokes the computer program to execute:

[0107] When the terminal device is configured to perform NR sidelink communication but not to perform LTE sidelink communication, determine from one or more frequencies that can provide configuration information of NR sidelink service, and the priority of the frequency on which at least one carrier in the NR sidelink carrier is located in the licensed frequency band is the first priority, and the first priority is the highest priority;

[0108] Determine from one or more frequencies that can provide configuration information of NR sidelink service, and the priority of the frequency on which there is no carrier located in the licensed frequency band in the NR sidelink carrier is the second priority, and the second priority is lower than the first priority.

[0109] In a possible implementation, the processor 401 invokes the computer program to execute:

[0110] When the terminal device is configured to perform the NR sidelink communication and the LTE sidelink communication, the configuration information capable of providing the NR sidelink service and the configuration information capable of providing the LTE sidelink service are determined from the one or more frequencies, and the priority of the frequency in which at least one carrier in the NR sidelink carrier and the LTE sidelink carrier is located on the licensed frequency band is the first priority, and the first priority is the highest priority.

[0111] The configuration information capable of providing the NR sidelink service and the configuration information capable of providing the LTE sidelink service are determined from the one or more frequencies, and the priority of the frequency in which at least one carrier in the NR sidelink carrier is located on the licensed frequency band or at least one carrier in the LTE sidelink carrier is located on the licensed frequency band is the second priority, and the second priority is lower than the first priority.

[0112] In a possible implementation, the processor 401, when invoking the computer program, is configured to perform:

[0113] When the terminal device is configured to perform the NR sidelink communication and the LTE sidelink communication, the configuration information capable of providing the NR sidelink service and the configuration information capable of providing the LTE sidelink service are determined from the one or more frequencies, and the priority of the frequency in which no carrier in the NR sidelink carrier and the LTE sidelink carrier is located on the licensed frequency band is the third priority, and the third priority is lower than the second priority.

[0114] In a possible implementation, the processor 401, when invoking the computer program, is configured to perform:

[0115] When the terminal device is configured to perform the NR sidelink communication and the LTE sidelink communication, the configuration information capable of providing the NR sidelink service is determined from the one or more frequencies, and the priority of the frequency in which at least one carrier in the NR sidelink carrier is located on the licensed frequency band is the fourth priority, and the fourth priority is lower than the third priority.

[0116] In a possible implementation, the processor 401, when invoking the computer program, is configured to perform:

[0117] When the terminal device is configured to perform the NR sidelink communication and the LTE sidelink communication, the configuration information capable of providing the LTE sidelink service is determined from the one or more frequencies, and the priority of the frequency in which at least one carrier in the LTE sidelink carrier is located on the licensed frequency band is the fourth priority.

[0118] In a possible implementation, the processor 401, when invoking the computer program, is configured to perform:

[0119] When the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, configuration information capable of providing NR sidelink service is determined from one or more frequencies, and the frequency of the carrier located on the licensed frequency range in the NR sidelink carrier is the fifth priority, which is lower than the fourth priority.

[0120] In a possible implementation, the processor 401 is configured to perform the following when invoking the computer program:

[0121] When the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, configuration information capable of providing LTE sidelink service is determined from one or more frequencies, and the frequency of the carrier located on the licensed frequency range in the LTE sidelink carrier is the fifth priority.

[0122] In the above possible implementation, specific contents can be referred to the corresponding steps of the above method embodiments, and will not be described here in detail.

[0123] Embodiments of the present application provide a chip. The chip comprises a processor and a memory. Wherein the number of processors can be one or more, and the number of memories can be one or more. The processor can execute the above cell reselection method and the steps performed by the related embodiments by reading the instructions and data stored on the memory. Figure 2

[0124] Embodiments of the present application also provide a chip module, which comprises the above chip and can execute the above cell reselection method and the steps performed by the related embodiments. Figure 2

[0125] Embodiments of the present application also provide a computer readable storage medium. The computer readable storage medium stores a computer program, and the computer program comprises program instructions. When the program instructions are executed by a processor, the above cell reselection method and the steps performed by the related embodiments can be executed. Figure 2

[0126] ​​​The computer readable storage medium can be an internal storage unit of the terminal device or the access network device in any of the preceding embodiments, for example, a hard disk or a memory of the device. The computer readable storage medium can also be an external storage device of the terminal device or the access network device, for example, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, and the like. Further, the computer readable storage medium can include both the internal storage unit and the external storage device of the terminal device or the access network device. The computer readable storage medium is used to store the computer program and other programs and data required by the terminal device or the access network device. The computer readable storage medium can also be used to temporarily store data that has been output or will be output. The computer readable storage medium can be any available medium accessible by a computer or a data storage device such as a server, a data center, and the like, including one or a set of available media. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium can be a solid state disk.

[0127] The above embodiments can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center through a wired or wireless manner.

[0128] It should be understood that in various embodiments of the present application, the size of the sequence number of each process does not mean the order of execution, and the execution order of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0129] In the embodiments of the present application, it should be understood that the disclosed method, device and system can be implemented in other manners. For example, the described device embodiment is merely schematic. For example, the division of the units is merely a logical function division. There can be another division manner for the actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between the units can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or in other forms.

[0130] The units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purposes of the embodiments of the present application.

[0131] In addition, each functional unit in the various embodiments of the present application can be integrated in one processing unit, or two or more functional units can be integrated in one processing unit. The integrated unit can be implemented in the form of hardware, or in the form of hardware plus software functional units.

[0132] The integrated unit implemented in the form of software functional units can be stored in a computer readable storage medium. The software functional units stored in the storage medium include a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute some steps of the methods described in the various embodiments of the present application.

[0133] Those of ordinary skill in the art can understand that all or part of the processes in the above-described embodiments can be completed by a computer program instructing related hardware, and the program can be stored in a computer readable storage medium. When the program is executed, it can include the processes of the above-described embodiments of the methods. The storage medium can be a magnetic disc, an optical disc, a read-only memory (ROM) or a random access memory (RAM), etc.

[0134] The above only describes a preferred embodiment of the present application, and of course cannot limit the scope of the present application. Those of ordinary skill in the art can understand that all or part of the processes of the above-described embodiments can be implemented, and equivalent changes made according to the claims of the present application still fall within the scope of the application.

Claims

1. A cell reselection method, characterized by, The application is applied to a terminal device, comprising: determining one or more frequency priorities according to sidelink service configuration information, sidelink carrier authorization information, and sidelink service of the terminal device, the sidelink carrier being a carrier provided in the sidelink service configuration information, the priority of a frequency with an authorized frequency band carrier in the sidelink carrier being higher than the priority of a frequency without an authorized frequency band carrier in the sidelink carrier; the sidelink service configuration information comprising transmission or reception configuration parameters, the configuration parameters comprising power control, modulation and coding mode for sidelink service of the terminal device; selecting a cell for camping according to the one or more frequency priorities.

2. The method of claim 1, wherein, The one or more frequency priorities are determined according to the sidelink service configuration information and the sidelink carrier authorization information, comprising: when the terminal device is configured to perform LTE sidelink communication but not NR sidelink communication, determining, from the one or more frequencies, a frequency capable of providing LTE sidelink service configuration information, and the priority of a frequency with at least one carrier in the LTE sidelink carrier located on an authorized frequency band being a first priority, the first priority being the highest priority; determining, from the one or more frequencies, a frequency capable of providing LTE sidelink service configuration information, and the priority of a frequency without a carrier located on an authorized frequency band in the LTE sidelink carrier being a second priority, the second priority being lower than the first priority.

3. The method of claim 1, wherein, The one or more frequency priorities are determined according to the sidelink service configuration information and the sidelink carrier authorization information, comprising: when the terminal device is configured to perform NR sidelink communication but not LTE sidelink communication, determining, from the one or more frequencies, a frequency capable of providing NR sidelink service configuration information, and the priority of a frequency with at least one carrier in the NR sidelink carrier located on an authorized frequency band being a first priority, the first priority being the highest priority; determining, from the one or more frequencies, a frequency capable of providing NR sidelink service configuration information, and the priority of a frequency without a carrier located on an authorized frequency band in the NR sidelink carrier being a second priority, the second priority being lower than the first priority.

4. The method of claim 1, wherein, The one or more frequency priorities are determined according to the sidelink service configuration information and the sidelink carrier authorization information, comprising: when the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, determining, from the one or more frequencies, a frequency capable of providing NR sidelink service configuration information and LTE sidelink service configuration information, and the priority of a frequency with at least one carrier in the NR sidelink carrier and the LTE sidelink carrier located on an authorized frequency band being a first priority, the first priority being the highest priority; determining, from the one or more frequencies, configuration information capable of providing NR sidelink service and configuration information capable of providing LTE sidelink service, and a frequency in which there is at least one carrier in the NR sidelink carrier located on a licensed frequency band or in which there is at least one carrier in the LTE sidelink carrier located on a licensed frequency band has a second priority, which is lower than the first priority.

5. The method of claim 4, wherein, The method further includes: determining, from the one or more frequencies, configuration information capable of providing NR sidelink service and configuration information capable of providing LTE sidelink service when the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, and a frequency in which there is no carrier located on a licensed frequency band in the NR sidelink carrier and in the LTE sidelink carrier has a third priority, which is lower than the second priority.

6. The method of claim 5, wherein, The method further includes: determining, from the one or more frequencies, configuration information capable of providing NR sidelink service when the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, and a frequency in which there is at least one carrier located on a licensed frequency band in the NR sidelink carrier has a fourth priority; or determining, from the one or more frequencies, configuration information capable of providing LTE sidelink service when the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, and a frequency in which there is at least one carrier located on a licensed frequency band in the LTE sidelink carrier has a fourth priority; the fourth priority is lower than the third priority.

7. The method of claim 6, wherein, The method further includes: determining, from the one or more frequencies, configuration information capable of providing NR sidelink service when the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, and a frequency in which there is no carrier located on a licensed frequency band in the NR sidelink carrier has a fifth priority; or determining, from the one or more frequencies, configuration information capable of providing LTE sidelink service when the terminal device is configured to perform NR sidelink communication and LTE sidelink communication, and a frequency in which there is no carrier located on a licensed frequency band in the LTE sidelink carrier has a fifth priority; the fifth priority is lower than the fourth priority.

8. A communication device, characterized by application to a terminal device, comprising: a processing unit configured to determine a priority of one or more frequencies respectively according to configuration information of sidelink service, licensed information of sidelink carrier and sidelink service of the terminal device, the sidelink carrier being a carrier provided in the configuration information of the sidelink service, a frequency in which there is a licensed frequency band carrier in the sidelink carrier has a higher priority than a frequency in which there is no licensed frequency band carrier in the sidelink carrier; the configuration information of the sidelink service includes configuration parameters of transmission or reception, and the configuration parameters include power control, modulation and coding mode for the sidelink service of the terminal device; the processing unit is further configured to select a cell for camping according to the priority of the one or more frequencies.

9. A terminal device, comprising: The terminal device comprises a processor and a memory, which are connected to each other, wherein the memory is configured to store a computer program comprising program instructions, and the processor is configured to invoke the program instructions to execute the method according to any one of claims 1 to 7.

10. A chip, characterized by The chip comprises a processor and a data interface, and the processor reads instructions stored on the memory through the data interface to execute the method according to any one of claims 1 to 7.

11. A chip module, characterized by The chip module comprises the chip according to claim 10.

12. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program comprising program instructions, and the program instructions, when executed by a processor, cause the processor to execute the method according to any one of claims 1 to 7.

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