Sidelink Carrier Selection Method and Equipment

Abstract

This application provides a sidelink carrier selection method and device, relating to the field of communication technology. The method includes: acquiring the CBR (Cost-Based Ratio) of one or more first carriers located in unlicensed frequency bands, and then selecting carriers with CBRs less than a first threshold from the one or more first carriers and adding them to a first candidate carrier set. Using this solution, fewer carriers located in unlicensed frequency bands can be selected during the carrier selection process, preventing the abuse of carriers in unlicensed frequency bands and improving the reliability of data transmission.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a sidelink carrier selection method and device. Background Technology

[0002] Sidelink (SL) communication is a type of wireless communication that transmits data directly between two or more user equipment (UEs) without the data needing to pass through access network equipment or other devices.

[0003] To improve throughput, carrier aggregation (CA) is introduced in SL communication, allowing UEs to transmit data simultaneously via multiple carriers. Some of these carriers operate on licensed frequency bands, while others may operate on unlicensed frequency bands.

[0004] Compared to licensed frequency bands, unlicensed frequency bands can be used without application and are free, but they are prone to interference. If carriers operating on unlicensed frequency bands are misused, the reliability of data transmission will inevitably be affected. Summary of the Invention

[0005] This application provides a sidelink carrier selection method and device, which can effectively improve the reliability of data transmission.

[0006] In a first aspect, this application provides a side-link carrier selection method, the method comprising:

[0007] Obtain the Channel Busy Ratio (CBR) of one or more first carriers located in an unlicensed frequency band;

[0008] Carriers with a CBR less than a first threshold are selected from the one or more first carriers and added to the first candidate carrier set.

[0009] In one feasible implementation, the method further includes:

[0010] Acquire the CBR of one or more second carriers located in the licensed frequency band;

[0011] Carriers with a CBR less than a second threshold are selected from the one or more second carriers and added to the first candidate carrier set.

[0012] In one feasible implementation, the method further includes:

[0013] At least one carrier is selected from the first candidate carrier set in ascending order of CBR as the target carrier for transmitting data on the side link.

[0014] In one feasible implementation, the method further includes:

[0015] When there is a second carrier with the same CBR located on a licensed frequency band and a first carrier located on an unlicensed frequency band in the first candidate carrier set, the second carrier with the same CBR is preferentially selected as the target carrier for transmitting data on the side link.

[0016] In one feasible implementation, before selecting at least one carrier from the first candidate carrier set as the target carrier for the side-link data transmission in ascending order of CBR, the method further includes:

[0017] Based on a preset offset value, the CBR of the first carrier is adjusted, wherein the adjusted CBR of the first carrier is greater than the unadjusted CBR of the first carrier.

[0018] In one feasible implementation, the method further includes:

[0019] Acquire the CBR of one or more second carriers located in the licensed frequency band;

[0020] Carriers with a CBR less than a second threshold are selected from the one or more second carriers and added to the second candidate carrier set.

[0021] In one feasible implementation, the method further includes:

[0022] When the number of carriers in the second candidate carrier set is greater than or equal to the number of carriers required for the side link data transmission, at least one carrier is selected from the second candidate carrier set as the target carrier for the side link data transmission in ascending order of CBR.

[0023] When the number of carriers in the second candidate carrier set is less than the number of carriers required for the side link data transmission, at least one carrier is selected from the first candidate carrier set in ascending order of CBR, and the carrier selected from the first candidate carrier set and the carriers in the second candidate carrier set are used as the target carriers for the side link data transmission.

[0024] In one feasible implementation, the second threshold is greater than the first threshold.

[0025] Secondly, this application provides a side-link carrier selection device, the device comprising:

[0026] The acquisition module is used to acquire the CBR of one or more first carriers, wherein the one or more first carriers are located in an unlicensed frequency band;

[0027] The selection module is used to select carriers with a CBR less than a first threshold from the one or more first carriers and add them to the first candidate carrier set.

[0028] In one feasible implementation, the acquisition module is further configured to:

[0029] Acquire the CBR of one or more second carriers located in the licensed frequency band;

[0030] The selection module is also used for:

[0031] Carriers with a CBR less than a second threshold are selected from the one or more second carriers and added to the first candidate carrier set.

[0032] In one feasible implementation, a processing module is also included, for:

[0033] At least one carrier is selected from the first candidate carrier set in ascending order of CBR as the target carrier for transmitting data on the side link.

[0034] In one feasible implementation, the processing module is further configured to:

[0035] When there is a second carrier with the same CBR located on a licensed frequency band and a first carrier located on an unlicensed frequency band in the first candidate carrier set, the second carrier with the same CBR is preferentially selected as the target carrier for transmitting data on the side link.

[0036] In one feasible implementation, the processing module is further configured to:

[0037] Based on a preset offset value, the CBR of the first carrier is adjusted, wherein the adjusted CBR of the first carrier is greater than the unadjusted CBR of the first carrier.

[0038] In one feasible implementation, the acquisition module is further configured to:

[0039] Acquire the CBR of one or more second carriers located in the licensed frequency band;

[0040] The selection module is also used for:

[0041] Carriers with a CBR less than a second threshold are selected from the one or more second carriers and added to the second candidate carrier set.

[0042] In one feasible implementation, a processing module is also included, for:

[0043] When the number of carriers in the second candidate carrier set is greater than or equal to the number of carriers required for the side link data transmission, at least one carrier is selected from the second candidate carrier set as the target carrier for the side link data transmission in ascending order of CBR.

[0044] When the number of carriers in the second candidate carrier set is less than the number of carriers required for the side link data transmission, at least one carrier is selected from the first candidate carrier set in ascending order of CBR, and the carrier selected from the first candidate carrier set and the carriers in the second candidate carrier set are used as the target carriers for the side link data transmission.

[0045] In one feasible implementation, the second threshold is greater than the first threshold.

[0046] Thirdly, this application provides a user equipment, including: at least one processor and a memory;

[0047] The memory stores computer-executed instructions;

[0048] The at least one processor executes computer execution instructions stored in the memory, causing the at least one processor to perform the sidelink carrier selection method as provided in the first aspect.

[0049] Fourthly, this application provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the sidelink carrier selection method provided in the first aspect.

[0050] Fifthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the sidelink carrier selection method as provided in the first aspect.

[0051] The sidelink carrier selection method and device provided in this application embodiment obtains the CBR of one or more first carriers located in unlicensed frequency bands, and then selects carriers with CBR less than a first threshold from the one or more first carriers to add to the first candidate carrier set. Thus, during the carrier selection process, only a small number of carriers located in unlicensed frequency bands can be selected, avoiding the abuse of carriers in unlicensed frequency bands and improving the reliability of data transmission. Attached Figure Description

[0052] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0053] Figure 1 This is a schematic diagram of the architecture of a data transmission system provided in the embodiments of this application;

[0054] Figure 2 A flowchart illustrating a side-link carrier selection method provided in this application embodiment. Figure 1 ;

[0055] Figure 3 A flowchart illustrating a side-link carrier selection method provided in this application embodiment. Figure 2 ;

[0056] Figure 4 A flowchart illustrating a side-link carrier selection method provided in this application embodiment. Figure 3 ;

[0057] Figure 5 A flowchart illustrating a side-link carrier selection method provided in this application embodiment. Figure 4 ;

[0058] Figure 6 A flowchart illustrating a side-link carrier selection method provided in this application embodiment. Figure 5 ;

[0059] Figure 7 A flowchart illustrating a side-link carrier selection method provided in this application embodiment. Figure 6 ;

[0060] Figure 8 A schematic diagram of a program module for a side-link carrier selection device provided in an embodiment of this application;

[0061] Figure 9 This is a schematic diagram of the hardware structure of a user equipment provided in an embodiment of this application. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Furthermore, although the disclosure in this application is described with reference to one or several exemplary examples, it should be understood that each aspect of these disclosures can also constitute a complete implementation method on its own.

[0063] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0064] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms can be used interchangeably where appropriate, for example, to implement the embodiments in a sequence other than those given in the illustrations or descriptions of this application.

[0065] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a series of components is not necessarily limited to those that are explicitly listed, but may include other components that are not explicitly listed or that are inherent to such product or device.

[0066] As used in this application, the term "module" means any known or subsequently developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and / or software code capable of performing the functions associated with that element.

[0067] The embodiments of this application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, evolution system of NR system, LTE-based access to unlicensed spectrum (LTE-U) system, NR-based access to unlicensed spectrum (NR-U) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), next-generation communication systems, or other communication systems, etc.

[0068] Traditional communication systems typically support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication but also, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, and vehicle-to-everything (V2X) communication. The embodiments of this application can also be applied to these communication systems.

[0069] Optionally, the communication system in this application embodiment can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, or a standalone (SA) network deployment scenario.

[0070] Reference Figure 1 , Figure 1 This is a schematic diagram of the architecture of a data transmission system provided in an embodiment of this application. The data transmission system provided in this embodiment includes UE101, UE102 and network device 103.

[0071] Optionally, UE101 and UE102 can refer to various forms of user equipment, access terminals, user units, user stations, mobile stations, mobile stations (MS), remote stations, remote terminals, mobile devices, terminal equipment, wireless communication equipment, user agents, or user devices. They can also be cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), handheld devices with wireless communication capabilities, computing devices, or other processing devices connected to a wireless modem, in-vehicle devices, wearable devices, terminal equipment in future 5G networks, or terminal equipment in future evolved Public Land Mobile Networks (PLMNs), etc. This application embodiment does not limit these, as long as the UE can wirelessly communicate with network equipment 103.

[0072] Optionally, network device 103, also known as public mobile communication network device, is the interface device for UE101 and UE102 to access the Internet. It is also a type of radio station, referring to a radio transceiver station that transmits information between UE101 and UE102 within a certain radio coverage area. This includes base stations (BS), also known as base station equipment, which is a device deployed in a radio access network (RAN) to provide wireless communication functions. For example, in 2G networks, devices providing base station functionality include Base Transceiver Stations (BTS); in 3G networks, NodeBs; in 4G networks, evolved NodeBs (eNBs); in Wireless Local Area Networks (WLANs), access points (APs) provide base station functionality; in 5G NR, gNBs provide base station functionality, and further evolved NodeBs (ng-eNBs) provide base station functionality. The gNB and UE communicate using NR technology, while the ng-eNB and UE communicate using Evolved Universal Terrestrial Radio Access (E-UTRA) technology. Both gNBs and ng-eNBs can connect to the 5G core network. The network device 103 in this embodiment also includes devices providing base station functionality in future new communication systems.

[0073] In this application embodiment, the one-way communication link from the access network to the UE is defined as the downlink (DL), and the data transmitted on the downlink is called downlink data. The transmission direction of the downlink data is called the downlink direction. The one-way communication link from the UE to the access network is defined as the uplink (UL), and the data transmitted on the uplink is called uplink data. The transmission direction of the uplink data is called the uplink direction. The UE can also communicate directly with each other. The link between UEs is called the sidelink (SL).

[0074] To improve throughput, a carrier aggregation mechanism is introduced in SL communication, allowing UEs to transmit data simultaneously via multiple carriers. Some of these carriers operate on licensed frequency bands, while others may operate on unlicensed frequency bands.

[0075] In some implementations, a CBR threshold is introduced. When a carrier with a CBR lower than the CBR threshold is measured, the carrier is added to the candidate carrier set. When there are multiple carriers in the candidate carrier set, the UE selects one or more carriers from the candidate carrier set in ascending order of CBR for data transmission.

[0076] While unlicensed frequency bands can be used without application and are free compared to licensed frequency bands, they are prone to interference. If unlicensed frequency bands are misused, the reliability of data transmission will inevitably be affected.

[0077] To address the aforementioned technical problems, this application provides a sidelink carrier selection method. When both carriers operating in licensed frequency bands and carriers operating in unlicensed frequency bands exist simultaneously, prioritizing the carrier operating in the licensed frequency band can prevent the abuse of unlicensed frequency bands and improve the reliability of data transmission. Detailed embodiments are described below.

[0078] Reference Figure 2 , Figure 2 A flowchart illustrating a side-link carrier selection method provided in this application embodiment. Figure 1 In one feasible implementation, the method includes:

[0079] S201. Obtain the CBR of one or more first carriers.

[0080] Among them, one or more of the aforementioned first carriers are located on unlicensed frequency bands.

[0081] In some embodiments, after measuring the CBR of a plurality of carriers that can be used for data transmission, the UE obtains the CBR of one or more first carriers located on unlicensed frequency bands from these carriers.

[0082] S202. Select carriers with a CBR less than a first threshold from one or more of the first carriers and add them to the first candidate carrier set.

[0083] In some embodiments, the first candidate carrier set may also include carriers located in the licensed frequency band.

[0084] In some embodiments, the first threshold can be preset, and only carriers with a CBR less than the first threshold can be added to the first candidate carrier set. It is understood that by setting the first threshold, carriers located in unlicensed frequency bands can be screened before carrier selection, and only carriers with a CBR less than the first threshold can be added to the candidate carrier group. This reduces the number of carriers added to the candidate carrier group and ensures that the carriers added to the candidate carrier group are relatively idle.

[0085] In some embodiments, at least one carrier can be selected as the target carrier for sidelink data transmission from the first candidate carrier set in ascending order of CBR.

[0086] The sidelink carrier selection method provided in this application embodiment can help select fewer carriers located on unlicensed frequency bands and more carriers located on licensed frequency bands during the carrier selection process, since only carriers with a CBR less than the first threshold can be added to the first candidate carrier set. This avoids the abuse of carriers on unlicensed frequency bands and improves the reliability of data transmission.

[0087] Reference Figure 3 , Figure 3 A flowchart illustrating a side-link carrier selection method provided in this application embodiment. Figure 2 In one feasible implementation, the method includes:

[0088] S301, Obtain the CBR of one or more first carriers, and obtain the CBR of one or more second carriers.

[0089] Among them, the aforementioned one or more first carriers are located in unlicensed frequency bands, and the aforementioned one or more second carriers are located in licensed frequency bands.

[0090] S302. Select carriers with CBR less than a first threshold from the above one or more first carriers and add them to the first candidate carrier set. Select carriers with CBR less than a second threshold from the above one or more second carriers and add them to the above first candidate carrier set.

[0091] The second threshold is greater than the first threshold.

[0092] In some embodiments, at least one carrier can be selected as the target carrier for sidelink data transmission from the first candidate carrier set in ascending order of CBR.

[0093] It is understandable that, since the second threshold is greater than the first threshold, more second carriers can be added to the first candidate carrier set, or fewer first carriers can be added to the candidate carrier set. As a result, during the carrier selection process, the UE can select more carriers located on the licensed frequency band, thereby improving the reliability of data transmission.

[0094] Reference Figure 4 , Figure 4 A flowchart illustrating a side-link carrier selection method provided in this application embodiment. Figure 3 In one feasible implementation, the method includes:

[0095] S401, Obtain the CBR of one or more first carriers, and obtain the CBR of one or more second carriers.

[0096] Among them, the aforementioned one or more first carriers are located in unlicensed frequency bands, and the aforementioned one or more second carriers are located in licensed frequency bands.

[0097] S402. Select carriers with CBR less than a first threshold from the above one or more first carriers and add them to the first candidate carrier set. Select carriers with CBR less than a second threshold from the above one or more second carriers and add them to the first candidate carrier set.

[0098] In one feasible implementation, the second threshold is greater than the first threshold.

[0099] In another feasible implementation, the second threshold may also be equal to the first threshold.

[0100] S403. Select at least one carrier from the first candidate carrier set as the target carrier for side link data transmission in ascending order of CBR.

[0101] Specifically, when there are two carriers with the same CBR (Cost-Based Ratio) in the first candidate carrier set, the second carrier is preferentially selected as the target carrier for transmitting data on the side link.

[0102] In this embodiment, the carriers in the first candidate carrier set can be sorted in ascending order of CBR. When selecting a carrier, if the UE encounters two or more carriers with the same CBR, and at least one of the carriers is located on a licensed frequency band and at least one of the carriers is located on an unlicensed frequency band, then the carrier located on the licensed frequency band is selected first.

[0103] Specifically, after prioritizing the selection of carriers located on licensed frequency bands, if the number of carriers selected by the UE is still insufficient to meet the number of carriers required for sidelink data transmission, then carriers located on unlicensed frequency bands will be selected; if the number of carriers selected by the UE already meets the number of carriers required for sidelink data transmission, then carrier selection will be stopped.

[0104] The sidelink carrier selection method provided in this application can help improve the reliability of data transmission by preferentially selecting the second carrier as the target carrier for sidelink data transmission when there are second carriers with the same CBR as the first carrier in the first candidate carrier set.

[0105] Reference Figure 5 , Figure 5 A flowchart illustrating a side-link carrier selection method provided in this application embodiment. Figure 4In one feasible implementation, the method includes:

[0106] S501, Obtain the CBR of one or more first carriers, and obtain the CBR of one or more second carriers.

[0107] Among them, the aforementioned one or more first carriers are located in unlicensed frequency bands, and the aforementioned one or more second carriers are located in licensed frequency bands.

[0108] S502. Based on the preset offset value, adjust the CBR of one or more of the first carriers.

[0109] The CBR after the first carrier adjustment is greater than the CBR before the first carrier adjustment.

[0110] S503. Select carriers with adjusted CBR less than a first threshold from the above one or more first carriers and add them to the first candidate carrier set. Select carriers with CBR less than a second threshold from the above one or more second carriers and add them to the above first candidate carrier set.

[0111] In one feasible implementation, the second threshold is greater than the first threshold.

[0112] In another feasible implementation, the second threshold may also be equal to the first threshold.

[0113] S504. Select at least one carrier from the first candidate carrier set in ascending order of CBR as the target carrier for the side link data transmission.

[0114] In some embodiments, at least one carrier can be selected from the first candidate carrier set as the target carrier for sidelink data transmission in ascending order of CBR.

[0115] It is understood that in this embodiment of the application, by increasing the CBR of the first carrier located on the unlicensed frequency band through the aforementioned preset offset value, and then using the aforementioned first threshold, more first carriers located on the unlicensed frequency band can be filtered out, thereby reducing the number of first carriers added to the first candidate carrier set; in addition, it can also make the first carrier located on the unlicensed frequency band ranked further back in the first candidate carrier set, so that the UE can preferentially select more second carriers during the carrier selection process, avoid the abuse of unlicensed frequency bands, and improve the reliability of data transmission.

[0116] Reference Figure 6 , Figure 6 A flowchart illustrating a side-link carrier selection method provided in this application embodiment. Figure 5 In one feasible implementation, the method includes:

[0117] S601, Obtain the CBR of one or more first carriers, and obtain the CBR of one or more second carriers.

[0118] Among them, the aforementioned one or more first carriers are located in unlicensed frequency bands, and the aforementioned one or more second carriers are located in licensed frequency bands.

[0119] S602. Select carriers with CBR less than a first threshold from the above one or more first carriers and add them to the first candidate carrier set. Select carriers with CBR less than a second threshold from the above one or more second carriers and add them to the above first candidate carrier set.

[0120] In one feasible implementation, the second threshold is greater than the first threshold.

[0121] In another feasible implementation, the second threshold may also be equal to the first threshold.

[0122] S603. Based on the preset offset value, adjust the CBR of the first carrier in the first candidate carrier set.

[0123] The CBR after the first carrier adjustment is greater than the CBR before the first carrier adjustment.

[0124] S604. Select at least one carrier from the first candidate carrier set in ascending order of CBR as the target carrier for the side link data transmission.

[0125] It is understandable that by increasing the CBR of the first carrier located on the unlicensed frequency band through the aforementioned preset offset value, the first carrier located on the unlicensed frequency band can be arranged further back in the first candidate carrier set. Therefore, when the UE selects a carrier, it can preferentially select the second carrier located on the licensed frequency band as the target carrier for the aforementioned sidelink transmission data.

[0126] Reference Figure 7 , Figure 7 A flowchart illustrating a side-link carrier selection method provided in this application embodiment. Figure 6 In one feasible implementation, the method includes:

[0127] S701, Obtain the CBR of one or more first carriers, and obtain the CBR of one or more second carriers.

[0128] Among them, the aforementioned one or more first carriers are located in unlicensed frequency bands, and the aforementioned one or more second carriers are located in licensed frequency bands.

[0129] S702. Select carriers with a CBR less than a first threshold from the above one or more first carriers and add them to the first candidate carrier set. Select carriers with a CBR less than a second threshold from the above one or more second carriers and add them to the second candidate carrier set.

[0130] Optionally, the second threshold may be the same as or different from the first threshold.

[0131] S703. Determine whether the number of carriers in the second candidate carrier set is less than the number of carriers required for data transmission on the side link. If not, proceed to S704; if yes, proceed to S705.

[0132] S704. Select at least one carrier from the second candidate carrier set as the target carrier for side link data transmission, in ascending order of CBR.

[0133] S705. Select at least one carrier from the first candidate carrier set in ascending order of CBR, and use the carrier selected from the first candidate carrier set and the carrier from the second candidate carrier set as the target carriers for transmitting data on the side link.

[0134] In this embodiment, two candidate carrier groups are introduced. A first carrier with a CBR less than a first threshold is added to the first candidate carrier set, and a second carrier with a CBR less than a second threshold is added to the second candidate carrier set. When selecting a carrier, the UE prioritizes selecting from the second candidate carrier set in ascending order of CBR. If the number of carriers in the second candidate carrier set is less than the number of carriers required for sidelink data transmission, after selecting all carriers in the second candidate carrier set, at least one carrier is selected from the first candidate carrier set in ascending order of CBR. The carrier selected from the first candidate carrier set and all carriers in the second candidate carrier set are used as the target carriers for sidelink data transmission. This allows for the selection of more carriers located in licensed frequency bands, avoids the abuse of carriers in unlicensed frequency bands, and improves the reliability of data transmission.

[0135] Based on the content described in the above embodiments, this application also provides a side-link carrier selection device, referring to... Figure 8 , Figure 8 This is a schematic diagram of the program modules of a side-link carrier selection device provided in an embodiment of this application. Figure 8 As shown, the side-link carrier selection device includes:

[0136] The acquisition module 801 is used to acquire the channel busy rate (CBR) of one or more first carriers located on unlicensed frequency bands.

[0137] Selection module 802 is used to select carriers with a CBR less than a first threshold from one or more first carriers and add them to the first candidate carrier set.

[0138] The sidelink carrier selection device provided in this application embodiment obtains the CBR of one or more first carriers located in unlicensed frequency bands, and then selects carriers with CBR less than a first threshold from the one or more first carriers to add to the first candidate carrier set. Thus, during the carrier selection process, only a small number of carriers located in unlicensed frequency bands can be selected, avoiding the abuse of carriers in unlicensed frequency bands and improving the reliability of data transmission.

[0139] In one feasible implementation, the acquisition module 801 is further configured to:

[0140] Acquire the CBR of one or more second carriers located in the licensed frequency band.

[0141] The selection module 802 is also used for:

[0142] Among the one or more second carriers mentioned above, carriers with a CBR less than the second threshold are selected and added to the first candidate carrier set mentioned above.

[0143] In one feasible implementation, a processing module is also included, for:

[0144] In accordance with the CBR in ascending order, at least one carrier is selected from the first candidate carrier set above as the target carrier for side link data transmission.

[0145] In one feasible implementation, the processing module is further configured to:

[0146] When there is a second carrier with the same CBR located in the licensed frequency band and a first carrier located in the unlicensed frequency band in the first candidate carrier set, the second carrier with the same CBR shall be preferentially selected as the target carrier for sidelink data transmission.

[0147] In one feasible implementation, the processing module is further configured to:

[0148] Based on a preset offset value, the CBR of the first carrier is adjusted, wherein the adjusted CBR of the first carrier is greater than the unadjusted CBR of the first carrier.

[0149] In one feasible implementation, the acquisition module 801 is further configured to:

[0150] Acquire the CBR of one or more second carriers located in the licensed frequency band.

[0151] The selection module 802 is also used for:

[0152] Select carriers with a CBR less than the second threshold from one or more of the above second carriers and add them to the second candidate carrier set.

[0153] In one feasible implementation, a processing module is also included, for:

[0154] When the number of carriers in the second candidate carrier set is greater than or equal to the number of carriers required for sidelink data transmission, at least one carrier is selected from the second candidate carrier set as the target carrier for sidelink data transmission in ascending order of CBR.

[0155] When the number of carriers in the second candidate carrier set is less than the number of carriers required for data transmission on the side link, at least one carrier is selected from the first candidate carrier set in ascending order of CBR, and the carrier selected from the first candidate carrier set and the carriers in the second candidate carrier set are used as the target carriers for data transmission on the side link.

[0156] In one feasible implementation, the second threshold is greater than the first threshold.

[0157] It is understood that the side-link carrier selection device described above and the side-link carrier selection method described in the above embodiments are implemented in the same way and in the same manner. You can refer to the description of each embodiment in the above side-link carrier selection method, and it will not be repeated here.

[0158] Furthermore, based on the content described in the above embodiments, this application also provides a user equipment, which includes at least one processor and a memory; wherein the memory stores computer execution instructions; the at least one processor executes the computer execution instructions stored in the memory to implement the content described in the embodiments corresponding to the above-described side-link carrier selection method.

[0159] To better understand the embodiments of this application, please refer to... Figure 9 , Figure 9 This is a schematic diagram of the hardware structure of a user equipment provided in an embodiment of this application.

[0160] like Figure 9 As shown, the user equipment 100 in this embodiment includes: a processor 901 and a memory 902; wherein

[0161] Memory 902 is used to store instructions executed by the computer;

[0162] The processor 901 is used to execute computer execution instructions stored in the memory to implement the various steps in the side-link carrier selection method described in the above embodiments, and for details, please refer to the relevant descriptions in the foregoing method embodiments.

[0163] Alternatively, the memory 902 can be either standalone or integrated with the processor 901.

[0164] When the memory 902 is set up independently, the device also includes a bus 903 for connecting the memory 902 and the processor 901.

[0165] This application provides a computer-readable storage medium storing computer-executable instructions. When a processor executes the computer-executable instructions, it implements the various steps of the sidelink carrier selection method described in the above embodiments.

[0166] This application provides a computer program product, including a computer program that, when executed by a processor, implements the various steps in the sidelink carrier selection method described in the above embodiments.

[0167] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or modules, and may be electrical, mechanical, or other forms.

[0168] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0169] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing unit, or each module can exist physically separately, or two or more modules can be integrated into one unit. The unit composed of the above modules can be implemented in hardware or in the form of hardware plus software functional units.

[0170] The integrated modules implemented as software functional modules described above can be stored in a computer-readable storage medium. These software functional modules, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods described in the various embodiments of this application.

[0171] It should be understood that the aforementioned processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the application can be directly manifested as execution by a hardware processor, or execution by a combination of hardware and software modules within the processor.

[0172] The memory may include high-speed RAM, and may also include non-volatile storage (NVM), such as at least one disk storage device, and may also be a USB flash drive, external hard drive, read-only memory, disk or optical disc, etc.

[0173] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0174] The aforementioned storage medium can be implemented from any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The storage medium can be any available medium accessible to general-purpose or special-purpose computers.

[0175] An exemplary storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. Alternatively, the storage medium can be an integral part of the processor. Both the processor and the storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and storage medium can exist as discrete components in an electronic device or host device.

[0176] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0177] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A method of sidelink carrier selection, the method comprising: The method comprises: obtaining channel busy ratio (CBR) of one or more first carriers, wherein the one or more first carriers are located on an unlicensed frequency band; selecting, from the one or more first carriers, a carrier with CBR less than a first threshold value and adding the carrier to a first candidate carrier set, wherein the first candidate carrier set is used for carrier aggregation transmission in sidelink communication; obtaining CBR of one or more second carriers, wherein the one or more second carriers are located on a licensed frequency band; selecting, from the one or more second carriers, a carrier with CBR less than a second threshold value and adding the carrier to the first candidate carrier set; or obtaining CBR of one or more second carriers, wherein the one or more second carriers are located on a licensed frequency band; selecting, from the one or more second carriers, a carrier with CBR less than a second threshold value and adding the carrier to a second candidate carrier set; when the number of carriers in the second candidate carrier set is greater than or equal to the number of carriers required for the sidelink transmission data, selecting at least one carrier from the second candidate carrier set as a target carrier for the sidelink transmission data in order of CBR from small to large; when the number of carriers in the second candidate carrier set is less than the number of carriers required for the sidelink transmission data, selecting at least one carrier from the first candidate carrier set in order of CBR from small to large, and using the selected carrier from the first candidate carrier set and the carrier from the second candidate carrier set as the target carrier for the sidelink transmission data; the second threshold value is greater than the first threshold value.

2. The method of claim 1, wherein, The method further comprises: selecting at least one carrier from the first candidate carrier set as a target carrier for the sidelink transmission data in order of CBR from small to large.

3. The method of claim 2, wherein, The method further comprises: when there are second carriers on the licensed frequency band and first carriers on the unlicensed frequency band with the same CBR in the first candidate carrier set, preferentially selecting the second carrier as the target carrier for the sidelink transmission data from the first carrier and the second carrier with the same CBR.

4. The method of claim 2, wherein, Before selecting at least one carrier from the first candidate carrier set as a target carrier for the sidelink transmission data in order of CBR from small to large, the method further comprises: adjusting the CBR of the first carrier based on a preset offset value, wherein the adjusted CBR of the first carrier is greater than the unadjusted CBR of the first carrier.

5. A side-link carrier selection device, characterized in that, The device comprises: an obtaining module configured to obtain channel busy ratio (CBR) of one or more first carriers, wherein the one or more first carriers are located on an unlicensed frequency band; a selecting module configured to select, from the one or more first carriers, a carrier with CBR less than a first threshold value and add the carrier to a first candidate carrier set, wherein the first candidate carrier set is used for carrier aggregation transmission in sidelink communication; the obtaining module is further configured to obtain CBR of one or more second carriers, wherein the one or more second carriers are located on a licensed frequency band; The selection module is further configured to: select, from the one or more second carriers, a carrier with a CBR less than a second threshold to add to the first candidate carrier set; or The obtaining module is further configured to: obtain a CBR of one or more second carriers, the one or more second carriers being located on a licensed frequency band; The selection module is further configured to: select, from the one or more second carriers, a carrier with a CBR less than a second threshold to add to a second candidate carrier set; The processing module is configured to: when a number of carriers in the second candidate carrier set is greater than or equal to a number of carriers required for the sidelink transmission data, select at least one carrier from the second candidate carrier set as a target carrier for the sidelink transmission data in a CBR ascending order; when the number of carriers in the second candidate carrier set is less than the number of carriers required for the sidelink transmission data, select at least one carrier from the first candidate carrier set in a CBR ascending order, and use the selected carrier in the first candidate carrier set and the carrier in the second candidate carrier set as target carriers for the sidelink transmission data; and the second threshold is greater than the first threshold.

6. The apparatus of claim 5, wherein, The processing module is further configured to: select at least one carrier from the first candidate carrier set as a target carrier for the sidelink transmission data in a CBR ascending order.

7. The apparatus of claim 6, wherein, The processing module is further configured to: when there are second carriers with the same CBR located on the licensed frequency band and first carriers located on the unlicensed frequency band in the first candidate carrier set, preferentially select the second carriers with the same CBR as the target carriers for the sidelink transmission data.

8. The apparatus of claim 6, wherein, The processing module is further configured to: adjust the CBR of the first carrier based on a preset offset value, wherein the adjusted CBR of the first carrier is greater than the unadjusted CBR of the first carrier. 9.A user equipment, comprising: The apparatus includes: at least one processor and a memory; the memory stores computer-executable instructions; the at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor performs the sidelink carrier selection method according to any one of claims 1 to 4.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, and when a processor executes the computer-executable instructions, the sidelink carrier selection method according to any one of claims 1 to 4 is implemented.

11. A computer program product comprising a computer program, characterized in that, The computer program is executed by a processor, and the sidelink carrier selection method according to any one of claims 1 to 4 is implemented.

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