Link determination method and apparatus, storage medium, and chip

Abstract

The present disclosure relates to a link determination method, apparatus, storage medium and chip. The method comprises: in the case that it is determined that a sidelink of a first terminal device and a non-sidelink cannot be simultaneously transmitted, obtaining a resource type used by the sidelink; and determining a target link for communication from the sidelink and the non-sidelink according to the resource type. In this way, the target link can be selected according to the resource type, so that the problem of sidelink transmission failure caused by unreasonable link selection can be avoided.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of communication, and in particular, to a link determination method and apparatus, a storage medium, and a chip. BACKGROUND

[0002] With the development of wireless communication technology, in order to realize direct communication between terminal devices, the 3rd Generation Partnership Project (3GPP) defines a Sidelink (which can be referred to as a direct link or a sidelink) communication mode. For example, one typical application scenario of Sidelink communication is Vehicle-to-Everything (V2X). In V2X, each vehicle can be regarded as a terminal device, and the terminal device can communicate with another terminal device through a direct link Sidelink, for example, information transmission through a direct link, thereby effectively reducing communication delay.

[0003] Due to the introduction of Sidelink, the above terminal device can exist in a case where multiple links have data to be sent, for example, both a direct link and a non-direct link have data to be sent. In related technologies, in a case where the direct link and the non-direct link cannot be sent at the same time, there is a problem of unreasonable link selection leading to failure of the direct link to send. SUMMARY

[0004] To overcome the above problems in related technologies, the present disclosure provides a link determination method, apparatus, storage medium, and chip.

[0005] According to a first aspect of an embodiment of the present disclosure, a link determination method is provided, applied to a first terminal device, and the method comprises:

[0006] In a case where it is determined that a direct link Sidelink and a non-direct link of the first terminal device cannot be sent at the same time, a resource type corresponding to the direct link is determined;

[0007] According to the resource type, a target link for communication is determined from the direct link and the non-direct link.

[0008] According to a second aspect of an embodiment of the present disclosure, a link determination method is provided, applied to an access network device, and the method comprises:

[0009] determining a first parameter;

[0010] send the first parameter to the first terminal device, where the first parameter is used to determine a first link selection threshold in a case where a resource type used by a sidelink is unlicensed resource, to instruct the first terminal device to determine a resource link correspondence relationship according to the first parameter, to determine a target link selection threshold corresponding to the resource type of the sidelink according to the resource link correspondence relationship, and to determine a target link used for communication according to the target link selection threshold.

[0011] According to a third aspect of the embodiments of the present disclosure, a link determination apparatus is provided, applied to a first terminal device, and the apparatus comprises:

[0012] A first determination module is configured to determine a resource type corresponding to a sidelink in a case where the sidelink and a non-sidelink cannot be simultaneously transmitted by the first terminal device.

[0013] A second determination module is configured to determine a target link used for communication from the sidelink and the non-sidelink according to the resource type.

[0014] According to a fourth aspect of the embodiments of the present disclosure, a link determination apparatus is provided, applied to an access network device, and the apparatus comprises:

[0015] A third determination module is configured to determine a first parameter.

[0016] A first sending module is configured to send the first parameter to the first terminal device, where the first parameter is used to determine a first link selection threshold in a case where a resource type used by a sidelink is unlicensed resource, to instruct the first terminal device to determine a resource link correspondence relationship according to the first parameter, to determine a target link selection threshold corresponding to the resource type of the sidelink according to the resource link correspondence relationship, and to determine a target link used for communication according to the target link selection threshold.

[0017] According to a fifth aspect of the embodiments of the present disclosure, a link determination apparatus is provided, comprising:

[0018] a processor;

[0019] a memory for storing processor-executable instructions;

[0020] The processor is configured to perform the steps of the link determination method provided in the first aspect of the present disclosure.

[0021] According to a sixth aspect of the embodiments of the present disclosure, a link determination apparatus is provided, comprising:

[0022] a processor;

[0023] a memory for storing processor-executable instructions;

[0024] The processor is configured to perform the steps of the link determination method provided in the second aspect of the present disclosure.

[0025] According to a seventh aspect of the embodiments of the present disclosure, a computer-readable storage medium is provided, which stores computer program instructions. The computer program instructions are executed by a processor to implement the steps of the link determination method provided in the first aspect of the present disclosure.

[0026] According to an eighth aspect of the embodiments of the present disclosure, a computer-readable storage medium is provided, which stores computer program instructions. The computer program instructions are executed by a processor to implement the steps of the link determination method provided in the second aspect of the present disclosure.

[0027] According to a ninth aspect of the embodiments of the present disclosure, a chip is provided, comprising: a processor and an interface; the processor is configured to read instructions to perform the steps of the link determination method provided in the first aspect of the present disclosure,

[0028] According to a tenth aspect of the embodiments of the present disclosure, a chip is provided, comprising: a processor and an interface; the processor is configured to read instructions to perform the steps of the link determination method provided in the second aspect of the present disclosure.

[0029] The technical solutions provided by the embodiments of the present disclosure can include the following beneficial effects: in the case that it is determined that the sidelink and the non-sidelink of the first terminal device cannot be transmitted at the same time, the resource type used by the sidelink is obtained; and the target link for communication is determined from the sidelink and the non-sidelink according to the resource type. In this way, the target link can be selected according to the resource type, so that the problem of sidelink transmission failure caused by unreasonable link selection can be avoided.

[0030] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0031] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0032] Figure 1 is a schematic diagram of a communication system according to an exemplary embodiment.

[0033] Figure 2 is a flowchart of a link determination method according to an exemplary embodiment.

[0034] Figure 3is a flowchart of a link determination method according to an example embodiment.

[0035] Figure 4 is a flowchart of a link determination method according to an example embodiment.

[0036] Figure 5 is a flowchart of a link determination method according to an example embodiment.

[0037] Figure 6 is a flowchart of a link determination method according to an example embodiment.

[0038] Figure 7 is a block diagram of a link determination apparatus according to an example embodiment.

[0039] Figure 8 is a block diagram of a link determination apparatus according to an example embodiment.

[0040] Figure 9 is a block diagram of a link determination apparatus according to an example embodiment.

[0041] Figure 10 is a block diagram of a link determination apparatus according to an example embodiment.

[0042] Figure 11 is a block diagram of a link determination apparatus according to an example embodiment. DETAILED DESCRIPTION

[0043] The example embodiments will be described in detail herein with reference to the attached drawings. In the following description, unless otherwise indicated, like numbers in the attached drawings refer to the same or similar elements. The following detailed description does not, however, contemplate all embodiments in accordance with the present disclosure. Rather, it is intended to describe some example embodiments in accordance with the present disclosure, as detailed in the appended claims.

[0044] It should be noted that all actions of acquiring signals, information or data in the present disclosure are performed in compliance with the corresponding data protection regulations policy of the country where the corresponding apparatus is located, and with the authorization given by the owner of the corresponding apparatus.

[0045] In the description of the present disclosure, the terms such as "first", "second", and the like are used to distinguish similar objects, and are not necessarily understood as a specific order or sequence. In addition, in the description of the drawings, the same reference signs indicate the same elements in different drawings, unless otherwise indicated.

[0046] In the description of the present disclosure, unless otherwise specified, "multiple" refers to two or more than two, and other quantifiers are similar thereto; "at least one of the following", "one or more" or the like refers to any combination of these items, including any combination of single or multiple items. For example, one or more of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple; "and / or" is a description of the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist together, and B exists alone, of which A and B can be singular or plural.

[0047] Although the operations are described in a particular order in the drawings of the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order or in a serial order, or requiring all the shown operations to be performed to obtain the desired results. In a specific environment, multitasking and parallel processing can be advantageous.

[0048] After the introduction of Sidelink communication, there can be a case where the terminal device has multiple links (for example, a direct link and a non-direct link) to be transmitted simultaneously. In some scenarios (for example, resource conflict, insufficient power, etc.), the direct link and the non-direct link (for example, uplink) cannot be transmitted simultaneously, at which time it is necessary to determine which link to use for transmission. If the direct link and the non-direct link both have data to be transmitted but cannot be transmitted simultaneously, in the related art, one link can be selected for transmission by comparing the logical channel priorities, but there is a problem that the target link cannot be reasonably selected, which can cause the direct link to fail and affect the communication quality between terminal devices.

[0049] To solve the above problems, the present disclosure provides a link determination method and device, a storage medium and a chip.

[0050] The implementation environment of the embodiments of the present disclosure will be introduced first as follows.

[0051] The technical solutions of the embodiments of the present application can be applied to various communication systems. The communication system can include one or more of a 4th Generation (4G) communication system, a 5th Generation (5G) communication system, and other future wireless communication systems (such as 6G). The communication system can also include one or more of a Public Land Mobile Network (PLMN) network, a Device-to-Device (D2D) communication system, a Machine to Machine (M2M) communication system, an Internet of Things (IoT) communication system, a Vehicle-to-Everything (V2X) communication system, or other communication systems.

[0052] Figure 1 is a schematic diagram of a communication system according to an exemplary embodiment, as shown in Figure 1 The communication system can include a terminal device 150 and an access network device 160. The communication system can be used to support 4G network access technologies, such as Long Term Evolution (LTE) access technologies, or 5G network access technologies, such as New Radio Access Technologies (New RATs), or other future wireless communication technologies. It should be noted that in the communication system, the number of access network devices and terminal devices can be one or more, Figure 1 The number of access network devices and terminal devices in the communication system shown is only an example, and the present disclosure does not limit the number of access network devices and terminal devices.

[0053] Figure 1The access network device in the embodiments of the present disclosure can be used to support terminal access, for example, the access network device can be an evolved Node B (eNB or eNodeB) in LTE; the access network device can also be a next Generation Node B (gNB or gNodeB) in a 5G network; the access network device can also be a wireless access network (NG Radio Access Network, NG-RAN) device in a 5G network; the access network device can also be a base station in a future evolved public land mobile network (PLMN), a broadband network service gateway (BNG), a convergence switch or a non-3GPP access device, etc. Optionally, the access network device in the embodiments of the present disclosure can include various forms of base stations, for example: a macro base station, a micro base station (also known as a small station), a relay station, an access point, a 5G base station or a future base station, a satellite, a transmitting and receiving point (TRP), a transmitting point (TP), a mobile switching center, and a device-to-device (D2D), machine-to-machine (M2M), Internet of Things (IoT), vehicle-to-everything (V2X) or other communication device that undertakes the function of a base station, etc., which are not limited in the embodiments of the present disclosure. For the convenience of description, the device providing wireless communication function for the terminal device in all the embodiments of the present disclosure is collectively referred to as an access network device or a base station.

[0054] Figure 1The terminal device in the embodiments of the present disclosure can be an electronic device providing voice or data connectivity, for example, the terminal device can also be referred to as a user equipment (UE), a subscriber unit, a mobile station, a station, a terminal, etc. For example, the terminal device can include a smartphone, a smart wearable device, a smart speaker, a smart tablet, a wireless modem, a wireless local loop (WLL) station, a PDA (personal digital assistant), a CPE (customer premise equipment), etc. With the development of wireless communication technology, devices that can access a communication system, communicate with access network devices of the communication system, communicate with other objects through the communication system, or devices that can directly communicate between two or more devices can be terminal devices in the embodiments of the present disclosure; for example, terminals and cars in smart transportation, home devices in smart home, power metering instruments, voltage monitoring instruments, environmental monitoring instruments in smart power grids, video monitoring instruments in smart security networks, cash registers, etc. In the embodiments of the present disclosure, the terminal device can communicate with the access network device. Multiple terminal devices can also communicate with each other. The terminal device can be static and fixed, or mobile, and the present disclosure does not limit this.

[0055] In some embodiments, Figure 1 The terminal device in the embodiments of the present disclosure can include a first terminal device 151 and a second terminal device 152, and the first terminal device 151 and the second terminal device 152 can communicate through a sidelink. Wherein, the manner of sidelink communication between the first terminal device 151 and the second terminal device 152 can include any one or more of unicast, multicast or broadcast. It should be noted that in the embodiments of the present disclosure, Figure 1 In the above, the first terminal device can be one or more, and the second terminal device can also be one or more, and the present disclosure does not limit this.

[0056] The first terminal device can communicate with the access network device through a non-direct link, which can include uplink and / or downlink between the first terminal device and the access network device. For example, the non-direct link can include one or more of the following links: PRACH (Physical Random Access Channel), PUCCH (Physical Uplink Control Channel), PUSCH (Physical Uplink Shared Channel), PDSCH (Physical Downlink Shared Channel), PDCCH (Physical Downlink Control Channel), etc.

[0057] Figure 2 A link determination method according to an exemplary embodiment is shown, which can be applied to the terminal device in the above communication system, for example, the first terminal device. As shown in Figure 2 The method can include:

[0058] S201, in a case where the first terminal device determines that the direct link (Sidelink) and the non-direct link of the first terminal device cannot be transmitted at the same time, the first terminal device determines the resource type corresponding to the direct link.

[0059] For example, the resource type used by the direct link can include one or more of the following: authorized resources and unlicensed resources. For example, the resource type of the authorized resource is used to represent that the first terminal device can use the ITU (International Telecommunication Union) or the licensed spectrum resource of a specific country / region to perform Sidelink transmission. The resource type of the unlicensed resource is used to represent that the first terminal device can use the unlicensed spectrum resource (Sidelink-U) to perform Sidelink transmission.

[0060] In some embodiments, the terminal device can determine the resource type according to the target resource currently used by the direct link. For example, when the frequency of the target resource of the direct link is within the frequency corresponding to the unlicensed spectrum resource, it can be determined that the resource type is the unlicensed resource.

[0061] It should be noted that the target resource currently used by the sidelink can be obtained by the terminal device from the access network device, or can be determined by the terminal device itself, for example, when the bandwidth of the licensed frequency resource is limited, the terminal device can determine at least one unlicensed frequency resource as the target resource.

[0062] In some embodiments, the non-sidelink link can be an uplink, the first device terminal can send data to the base station through the uplink, and in the case that there is data to be sent through the sidelink and the non-sidelink link at the same time, but the sidelink and the non-sidelink link cannot be sent at the same time due to specific reasons, the terminal device can determine that the sidelink and the non-sidelink link cannot be sent at the same time. The specific reasons can include one or more of frequency resource conflict, insufficient transmit power of the terminal device, etc., which are not limited by the present disclosure.

[0063] S202, the first terminal device determines a target link for communication from the sidelink and the non-sidelink link according to the resource type.

[0064] In this step, different ways can be used to determine the target link according to different resource types.

[0065] In some embodiments, in the case of unlicensed resources, the sidelink can be used as the target link to transmit data preferentially.

[0066] It should be noted that in the case of using unlicensed resources for Sidelink transmission, multiple terminal devices will perform channel listening to determine whether the link resources (such as frequency resources, channel resources) are idle, and if the terminal device finds that certain link resources are not used for transmission by any terminal within a certain time through channel listening, it can be determined that the link resources are idle, so that the terminal device can occupy the link resources for Sidelink transmission. Therefore, in the case that the resource type is unlicensed resource and the sidelink and the non-sidelink link cannot be sent at the same time, if the non-sidelink link is selected preferentially, the resources of the sidelink will be idle, which will cause the resources of the sidelink to be occupied by other terminal devices with a certain probability, resulting in failure of the sidelink transmission.

[0067] Through the manner in the embodiment, in the case of unlicensed resources, the sidelink is used as the target link preferentially, which can avoid the unlicensed resources being occupied by other terminal devices due to long idle of the resources of the sidelink, thereby improving the reliability of the sidelink transmission.

[0068] In some embodiments, in the case that the resource type is a licensed resource, the link selection can be performed in a manner in the related art. For example, the direct link or the indirect link can be selected as the target link according to a fair principle. For example, the direct link and the indirect link can be used in turn according to time; for another example, the target link can be randomly selected from the direct link or the indirect link.

[0069] With the above method, in the case that it is determined that the direct link Sidelink and the indirect link of the first terminal device cannot be simultaneously transmitted, the resource type used by the direct link is acquired; and the target link for communication is determined from the direct link and the indirect link according to the resource type. In this way, the target link can be selected according to the resource type, so that the problem that the direct link transmission fails due to unreasonable link selection can be avoided.

[0070] Figure 3 A link determination method is shown according to an exemplary embodiment. As shown in Figure 3 , the method can include:

[0071] S301, in the case that it is determined that the direct link Sidelink and the indirect link of the first terminal device cannot be simultaneously transmitted, the first terminal device determines the resource type corresponding to the direct link.

[0072] S302, the first terminal device determines a target link selection threshold according to the resource type of the direct link.

[0073] For example, the target link selection threshold corresponding to the resource type can be determined according to the resource link correspondence relationship. The resource link correspondence relationship includes the correspondence relationship between the resource type of the direct link and the link selection threshold.

[0074] In some embodiments, the resource link correspondence relationship can include a first link selection threshold corresponding to the case that the resource type of the direct link is an unlicensed resource.

[0075] In some other embodiments, the resource link correspondence relationship can include a second link selection threshold corresponding to the case that the resource type of the direct link is a licensed resource.

[0076] In some embodiments, different resource types can correspond to different link selection thresholds. For example, the link selection thresholds corresponding to the licensed resource and the unlicensed resource can be different, that is, the first link selection threshold and the second link selection threshold described above can be different.

[0077] In some other embodiments, different resource types can also correspond to the same link selection threshold. For example, the link selection thresholds corresponding to the licensed resource and the unlicensed resource can also be the same, that is, the first link selection threshold and the second link selection threshold described above can be the same.

[0078] In some embodiments of the present disclosure, in the case that the resource type comprises unlicensed resources, the first link selection threshold corresponding to the unlicensed resources can be selected as the target link selection threshold according to the resource link correspondence.

[0079] For example, in the case that the resource type is unlicensed resources, the first link selection threshold corresponding to the unlicensed resources can be selected as the target link selection threshold.

[0080] In some embodiments, the target link selection threshold can comprise a target direct link priority threshold and a target indirect link priority threshold; the first link selection threshold can also comprise a first direct link priority threshold and a first indirect link priority threshold; and the second link selection threshold can also comprise a second direct link priority threshold and a second indirect link priority threshold.

[0081] In this way, different target link selection thresholds are determined according to different resource types, and flexible target link selection can be achieved.

[0082] In some embodiments, the first direct link priority threshold can be lower than the second direct link priority threshold.

[0083] In some other embodiments, the first indirect link priority threshold can be higher than the second indirect link priority threshold.

[0084] In some other embodiments, the first direct link priority threshold can be lower than the second direct link priority threshold, and the first indirect link priority threshold can be higher than the second indirect link priority threshold.

[0085] Through the above thresholds, the first terminal device can preferentially select a direct link for transmission in the case that the resource type of the direct link is unlicensed resources.

[0086] For example, the first terminal device can first acquire a first logical channel priority corresponding to the direct link and a second logical channel priority corresponding to the indirect link; and then in the case that the first logical channel priority is higher than the target direct link priority threshold and the second logical channel priority is lower than the target indirect link priority threshold, the direct link is selected as the target link, that is, the direct link transmission is preferentially performed.

[0087] In this way, in the case that the first direct link priority threshold is lower than the second direct link priority threshold and / or the first indirect link priority threshold is higher than the second indirect link priority threshold, the first terminal device can preferentially select a direct link for transmission in the case of using unlicensed resources.

[0088] In this way, in the case that the direct link uses unlicensed resources and the direct link and the indirect link cannot be transmitted at the same time, the direct link can be preferentially selected for transmission, so as to avoid the failure of the direct link transmission caused by the unlicensed resources being idle and being preempted by other terminals.

[0089] In some embodiments of the present disclosure, in the case that the resource type is unlicensed resources and the first terminal device is not the last terminal in the channel occupancy time COT, the first link selection threshold corresponding to the unlicensed resources can be used as the target link selection threshold.

[0090] It should be noted that when the terminal device transmits the direct link Sidelink on the unlicensed resources (for example, unlicensed spectrum resources), the terminal device can select the unlicensed resources for transmission through the LBT (Listen Before Talk) mechanism. The time when the terminal device transmits on the unlicensed resources is the channel occupancy time COT, and the terminal device can also share the channel occupancy time COT with other terminal devices for Sidelink transmission. The multiple terminals sharing the same channel occupancy time COT can transmit the Sidelink in the order negotiated.

[0091] If the first terminal device is not the last terminal sharing the same channel occupancy time COT, and the first terminal device is interrupted, other terminal devices not sharing the COT can preempt the COT, which can cause the terminal devices sharing the COT and transmitting after the first terminal device to be unable to transmit the Sidelink. Therefore, in this embodiment, a separate target link selection threshold can be set for this scenario, so that the first terminal device preferentially transmits the Sidelink using the direct link.

[0092] For example, in the case that the resource type is unlicensed resources, the first link selection threshold corresponding to the unlicensed resources can be used as the target link selection threshold. It should be noted that the first link selection threshold corresponding to the unlicensed resources can make the first terminal device preferentially select the direct link for transmission.

[0093] In some embodiments, the target link selection threshold can include a target direct link priority threshold and a target indirect link priority threshold; and the first link selection threshold can also include a first direct link priority threshold and a first indirect link priority threshold.

[0094] In some embodiments of the present disclosure, in a case where the resource type is a licensed resource, the second link selection threshold corresponding to the licensed resource can be selected as the target link selection threshold according to the resource link correspondence.

[0095] The second link selection threshold and the first link selection threshold can be the same or different. In this way, different link selection thresholds can be flexibly set for different resource types, so that flexible resource allocation strategies can be implemented.

[0096] It should be noted that, in a case where the sidelink currently used by the first terminal device includes both unlicensed resources and licensed resources, the target resource can also be determined in the manner of a case where the resource type is an unlicensed resource in embodiments of the present disclosure.

[0097] In some embodiments of the present disclosure, the determination manner of the resource link correspondence can include one or more of the following manners:

[0098] Manner one, receiving a first parameter sent by the access network device; determining the resource link correspondence according to the first parameter.

[0099] In some embodiments, the first parameter can be used to instruct the first terminal device to determine the first link selection threshold in a case where the resource type is an unlicensed resource.

[0100] For example, the first parameter can include the first link selection threshold corresponding to the unlicensed resource.

[0101] In another embodiment, in a case where the first link selection threshold includes a first sidelink priority threshold and a first non-sidelink priority threshold, the first parameter can include a second parameter used to determine the first sidelink priority threshold, and a third parameter used to determine the first non-sidelink priority threshold.

[0102] For example, the first parameter can include the first sidelink priority threshold and the first non-sidelink priority threshold corresponding to the unlicensed resource.

[0103] In another embodiment, the first parameter can also be used to instruct the first terminal device to determine the first link selection threshold in a case where the resource type is an unlicensed resource, and the second link selection threshold in a case where the resource type is a licensed resource.

[0104] For example, the first parameter can include the first link selection threshold corresponding to the unlicensed resource and the second link selection threshold corresponding to the licensed resource.

[0105] In yet some embodiments, in a case that the first link selection threshold comprises a first direct link priority threshold and a first non-direct link priority threshold, and the second link selection threshold comprises a second direct link priority threshold and a second non-direct link priority threshold, the first parameter can comprise a fourth parameter for determining the first direct link priority threshold, a fifth parameter for determining the first non-direct link priority threshold, a sixth parameter for determining the second direct link priority threshold, and a seventh parameter for determining the second non-direct link priority threshold.

[0106] For example, the first parameter can comprise a first direct link priority threshold and a first non-direct link priority threshold corresponding to a case that the resource type is an unlicensed resource, and a second direct link priority threshold and a second non-direct link priority threshold corresponding to a case that the resource type is a licensed resource.

[0107] Option 2: The first terminal device determines the resource link correspondence relationship according to a preset parameter.

[0108] In some embodiments, the preset parameter can comprise a first link selection threshold corresponding to an unlicensed resource.

[0109] In some other embodiments, the preset parameter can comprise a first link selection threshold corresponding to an unlicensed resource, and a second link selection threshold corresponding to a licensed resource.

[0110] It should be noted that the first terminal device can also combine the above-mentioned option 1 and option 2 to determine the above-mentioned resource link correspondence relationship. For example, in a case that the first terminal device receives the first parameter sent by the access network device, the first terminal device can determine the resource link correspondence relationship according to the first parameter. Conversely, in a case that the first terminal device does not receive the first parameter sent by the access network device or the received first parameter does not meet the preset parameter condition, the first terminal device can determine the resource link correspondence relationship according to the preset parameter.

[0111] S303: The first terminal device determines the target link according to a target link selection threshold.

[0112] The target link selection threshold can comprise a target direct link priority threshold and a target non-direct link priority threshold. In this step, the first logical channel priority corresponding to the direct link and the second logical channel priority corresponding to the non-direct link can be obtained first. Then, the target link can be determined according to the first logical channel priority, the second logical channel priority, the target direct link priority threshold, and the target non-direct link priority threshold.

[0113] For example, the first terminal device can determine the target link, i.e., whether to prefer sidelink transmission over the sidelink or over the non-sidelink, according to the relationship between the first logical channel priority and the target sidelink priority threshold, and the relationship between the second logical channel and the target non-sidelink priority threshold.

[0114] In some embodiments, the first terminal device can select the sidelink as the target link, i.e., prefer sidelink transmission, if a first preset condition is met.

[0115] In addition, the first terminal device can also select the non-sidelink as the target link, i.e., prefer non-sidelink transmission (e.g., uplink transmission), if the first preset condition is not met.

[0116] The first preset condition can include that the first logical channel priority is higher than the target sidelink priority threshold, and the second logical channel priority is lower than the target non-sidelink priority threshold.

[0117] It should be noted that the smaller the value of the priority is, the higher the priority is, or the larger the value of the priority is, the higher the priority is, which is not limited in the present disclosure.

[0118] For example, if the smaller the value of the priority is, the higher the priority is, the first preset condition can include that the value of the first logical channel priority is smaller than the value of the target sidelink priority threshold, and the value of the second logical channel priority is larger than the value of the target non-sidelink priority threshold.

[0119] In some other embodiments, the first terminal device can select the non-sidelink as the target link, i.e., prefer non-sidelink transmission, if a second preset condition is met, and select the sidelink as the target link, i.e., prefer sidelink transmission, if the second preset condition is not met.

[0120] The second preset condition can include that the first logical channel priority is lower than the target sidelink priority threshold, and the second logical channel priority is higher than the target non-sidelink priority threshold.

[0121] In this way, the target link can be determined more flexibly according to the logical channel priority and the link priority threshold.

[0122] It should be noted that the target link selection threshold can include a target direct link priority threshold and a target indirect link priority threshold; the first link selection threshold can also include a first direct link priority threshold and a first indirect link priority threshold; and the second link selection threshold can also include a second direct link priority threshold and a second indirect link priority threshold.

[0123] In some embodiments, the first direct link priority threshold can be lower than the second direct link priority threshold.

[0124] In some other embodiments, the first indirect link priority threshold can be higher than the second indirect link priority threshold.

[0125] In some other embodiments, the first direct link priority threshold can be lower than the second direct link priority threshold, and the first indirect link priority threshold can be higher than the second indirect link priority threshold.

[0126] In the above manner, in the case that the direct link uses unlicensed resources and the direct link and the indirect link cannot be transmitted at the same time, the direct link can be preferentially selected for transmission, so as to avoid the failure of the direct link transmission caused by the unlicensed resources used for the direct link transmission being idle and being preempted by other terminals.

[0127] In some embodiments, the first logical channel priority can be the priority of a logical channel with the highest priority among at least one logical channel corresponding to the direct link and having data to be transmitted.

[0128] For example, if the direct link of the first terminal device includes N logical channels having data to be transmitted, the priority of a logical channel with the highest priority among the N logical channels can be taken as the first logical channel priority.

[0129] In some other embodiments, the first logical channel priority can be the priority of a logical channel with the lowest priority among at least one logical channel corresponding to the direct link and having data to be transmitted.

[0130] In some other embodiments, the first logical channel priority can be the average of the priorities of at least one logical channel corresponding to the direct link and having data to be transmitted.

[0131] In some embodiments, the second logical channel priority can be the priority of a logical channel with the highest priority among at least one logical channel corresponding to the indirect link and having data to be transmitted.

[0132] In some embodiments, the second logical channel priority can be the priority of a logical channel with the lowest priority among at least one logical channel corresponding to the sidelink for which there is data to be transmitted.

[0133] In some embodiments, the second logical channel priority can be the average of the priorities of at least one logical channel corresponding to the sidelink for which there is data to be transmitted.

[0134] In this way, the logical channel priority can be flexibly determined according to requirements.

[0135] In some embodiments of the present disclosure, the first logical channel priority can be determined by the following steps:

[0136] First, in the case where the resource type is unlicensed resources, at least one second terminal device sharing the same channel occupancy time (COT) with the first terminal device is determined.

[0137] In some embodiments, the second terminal device can be a terminal device sharing the same channel occupancy time (COT) with the first terminal device and not using the channel occupancy time (COT) for data transmission.

[0138] In some embodiments, the second terminal device can be a terminal device sharing the same channel occupancy time (COT) with the first terminal device and not using the channel occupancy time (COT) for data transmission.

[0139] Then, the first logical channel priority is determined according to at least one logical channel corresponding to the sidelink of the first terminal device and the second terminal device.

[0140] In some embodiments, the priority of a logical channel with the highest priority among at least one logical channel corresponding to the sidelink of the first terminal device and the second terminal device for which there is data to be transmitted can be taken as the first logical channel priority.

[0141] For example, the sidelink of the first terminal device includes N logical channels for which there is data to be transmitted, and the second terminal device includes K, and each sidelink of the second terminal device includes M logical channels for which there is data to be transmitted. There are a total of (N+K*M) logical channels for which there is data to be transmitted, and the priority of a logical channel with the highest priority among the (N+K*M) logical channels can be taken as the first logical channel priority.

[0142] In some embodiments, the priority of a logical channel with the lowest priority among at least one logical channel corresponding to the sidelink of the first terminal device and the second terminal device for which there is data to be transmitted can be taken as the first logical channel priority.

[0143] In some embodiments, the first terminal device can receive a fourth logical channel priority sent by the second terminal device. The fourth logical channel priority can represent a priority of at least one logical channel corresponding to the sidelink of the second terminal device and having data to be transmitted.

[0144] In this way, the logical channel priorities corresponding to the logical channels of the plurality of terminal devices sharing the same COT (e.g., the first terminal device and the second terminal device) are all taken into account, and the maximum value, the minimum value, or the average value of the logical channel priorities is selected as the first logical channel priority. Then, the target link is determined according to the first logical channel priority, the target sidelink priority threshold, the second logical channel priority, and the target non-sidelink priority threshold. Thus, the plurality of terminal devices sharing the same COT are considered when determining the target link, and the target link can be determined more comprehensively and accurately, and the unlicensed resources corresponding to the sidelink can be prevented from being occupied by other terminal devices.

[0145] In some embodiments of the present disclosure, the first terminal device can receive a fifth logical channel priority sent by the second terminal device. The fifth logical channel priority represents a priority of at least one logical channel corresponding to the sidelink of the second terminal device and having data to be transmitted. For example, the fifth logical channel can be a logical channel with the highest priority among the at least one logical channel corresponding to the sidelink of the second terminal device and having data to be transmitted.

[0146] The second terminal device can be a terminal device sharing the same channel occupancy time (COT) with the first terminal device. The second terminal device can also be a terminal device sharing the same channel occupancy time (COT) with the first terminal device and not using the channel occupancy time (COT) for data transmission.

[0147] For example, any one of the plurality of terminal devices sharing the same COT can send the logical channel priority of the terminal device to other terminal devices.

[0148] It should be noted that the terminal device can send the above logical channel priority through one or more of a Sidelink RRC (Sidelink Radio Resource Control) message, a Sidelink MAC CE (Sidelink Medium Access Control Control Element), and an SCI (Sidelink Control Information). The terminal device can also receive the above logical channel priority through one or more of a Sidelink RRC message, a Sidelink MAC CE, and an SCI.

[0149] In some embodiments of the present disclosure, the first terminal device can receive resource position information sent by the second terminal device, and the resource position information can be used to represent position information of the second terminal device for data transmission in the COT.

[0150] In some embodiments, the resource position information can represent the ordering position of the second terminal device for data transmission in the COT.

[0151] In some embodiments, the resource position information can include one or more of time position information and frequency position information.

[0152] In this way, the first terminal device can determine at least one second terminal device that shares the same COT with the first terminal device and does not use the COT for data transmission according to the resource position information.

[0153] Figure 4 A link determination method is shown according to an exemplary embodiment. As shown in Figure 4 the method can include:

[0154] S401, in a case where the first terminal device determines that the Sidelink and the non-Sidelink of the first terminal device cannot be transmitted at the same time, the first terminal device determines a resource type corresponding to the Sidelink.

[0155] S402, in a case where the resource type is an unlicensed resource, the first terminal device determines at least one second terminal device that shares the same COT with the first terminal device.

[0156] In some embodiments, the second terminal device can be a terminal device that shares the same COT with the first terminal device and does not use the COT for data transmission.

[0157] In some embodiments, the second terminal device can be all terminal devices sharing the same channel occupancy time (COT) with the first terminal device.

[0158] S403, determine a third logical channel priority according to at least one logical channel corresponding to the sidelink between the first terminal device and the second terminal device.

[0159] In some embodiments, the third logical channel priority can be the priority of a logical channel with the highest priority among at least one logical channel corresponding to the sidelink between the first terminal device and the second terminal device and having data to be transmitted.

[0160] For example, the sidelink of the first terminal device includes N logical channels having data to be transmitted, and the sidelink of each of the K second terminal devices includes M logical channels having data to be transmitted. There are a total of (N+K*M) logical channels having data to be transmitted. The priority of a logical channel with the highest priority among the (N+K*M) logical channels can be taken as the first logical channel priority.

[0161] In some embodiments, the third logical channel priority can be the priority of a logical channel with the lowest priority among at least one logical channel corresponding to the sidelink between the first terminal device and the second terminal device and having data to be transmitted.

[0162] In some embodiments, the third logical channel priority can be the average of the priorities of at least one logical channel corresponding to the sidelink between the first terminal device and the second terminal device and having data to be transmitted.

[0163] S404, determine a fourth logical channel priority according to at least one logical channel corresponding to the non-sidelink of the first terminal device.

[0164] In some embodiments, the fourth logical channel priority can be the priority of a logical channel with the highest priority among at least one logical channel corresponding to the non-sidelink and having data to be transmitted.

[0165] In some embodiments, the fourth logical channel priority can be the priority of a logical channel with the lowest priority among at least one logical channel corresponding to the non-sidelink and having data to be transmitted.

[0166] In some embodiments, the fourth logical channel priority can be the average of the priorities of at least one logical channel corresponding to the non-sidelink and having data to be transmitted.

[0167] S405, determining the target link according to the third logical channel priority and the fourth logical channel priority.

[0168] In this step, there can be multiple ways to determine the target link, for example:

[0169] In some embodiments, in the case that the third logical channel priority is greater than or equal to the fourth logical channel priority, the sidelink can be taken as the target link.

[0170] In some other embodiments, in the case that the third logical channel priority is less than the fourth logical channel priority, the non-sidelink can be taken as the target link.

[0171] In some other embodiments, a sidelink priority threshold and a non-sidelink priority threshold can be determined first; then, the target link can be determined according to the third logical channel priority, the fourth logical channel priority, the sidelink priority threshold and the non-sidelink priority threshold.

[0172] For example, the first terminal device can determine the target link according to the relationship between the third logical channel priority and the sidelink priority threshold, and the relationship between the fourth logical channel and the non-sidelink priority threshold, that is, whether to prefer sidelink transmission or non-sidelink transmission.

[0173] In some embodiments, the first terminal device can take the sidelink as the target link, that is, prefer sidelink transmission, in the case that a third preset condition is met.

[0174] In addition, the first terminal device can also take the non-sidelink as the target link, that is, prefer non-sidelink transmission (such as uplink transmission), in the case that the above-mentioned third preset condition is not met.

[0175] The third preset condition can include that the third logical channel priority is higher than the sidelink priority threshold, and the fourth logical channel priority is lower than the non-sidelink priority threshold.

[0176] It should be noted that the smaller the value of the priority is, the higher the priority is, or the larger the value of the priority is, the higher the priority is, which is not limited in the present disclosure.

[0177] In some embodiments of the present disclosure, the first terminal device can receive a fifth logical channel priority sent by the second terminal device. The fifth logical channel priority represents a priority of at least one logical channel corresponding to the sidelink of the second terminal device and having data to be transmitted.

[0178] The second terminal device can be a terminal device sharing the same channel occupancy time COT with the first terminal device. The second terminal device can also be a terminal device sharing the same channel occupancy time COT with the first terminal device and not using the channel occupancy time COT for data transmission.

[0179] For example, any one of the terminal devices sharing the same COT can send the respective logical channel priority to other terminal devices.

[0180] It should be noted that the terminal device can send the above-mentioned logical channel priority through one or more of the Sidelink RRC message, the Sidelink MAC CE and the SCI. The terminal device can also receive the above-mentioned logical channel priority through one or more of the Sidelink RRC message, the Sidelink MAC CE and the SCI.

[0181] In some embodiments of the present disclosure, the first terminal device can receive resource location information sent by the second terminal device, and the resource location information can be used to represent the location information of the second terminal device for data transmission through the channel occupancy time COT.

[0182] In some embodiments, the resource location information can represent the ordering position of the second terminal device for data transmission through the COT.

[0183] In some embodiments, the resource location information can include one or more of the time location information and the frequency location information.

[0184] In this way, the first terminal device can determine at least one second terminal device sharing the same channel occupancy time COT with the first terminal device and not using the channel occupancy time COT for data transmission according to the resource location information.

[0185] Figure 5 A link determination method according to an exemplary embodiment is shown, which can be applied to the access network device in the above-mentioned communication system. As shown in Figure 5 The method can include:

[0186] S501, determine, by an access network device, a first parameter.

[0187] S502, send, by the access network device, the first parameter to a first terminal device.

[0188] The first parameter is used to determine a first link selection threshold in a case where a resource type used by a sidelink is unlicensed resource, to instruct the first terminal device to determine a resource link correspondence relationship according to the first parameter, determine a target link selection threshold corresponding to the resource type of the sidelink according to the resource link correspondence relationship, and determine a target link used for communication according to the target link selection threshold.

[0189] In this way, the access network device can send the first parameter to the first terminal device, and instruct the first terminal device to determine the first link selection threshold in the case where the resource type used by the sidelink is unlicensed resource according to the first parameter, so as to determine the target link selection threshold in the case where the resource type is unlicensed resource, and determine the target link used for communication according to the target link selection threshold. The target link can be selected according to the resource type, so that the problem of sidelink transmission failure caused by unreasonable link selection can be avoided.

[0190] In some embodiments, the first parameter can be used to instruct the first terminal device to determine the first link selection threshold in the case where the resource type is unlicensed resource.

[0191] For example, the first parameter can include a first link selection threshold corresponding to unlicensed resource.

[0192] Further, the first link selection threshold can include a first sidelink priority threshold and a first non-sidelink priority threshold, the first parameter can include a second parameter used to determine the first sidelink priority threshold, and a third parameter used to determine the first non-sidelink priority threshold.

[0193] For example, the first parameter can include a first sidelink priority threshold and a first non-sidelink priority threshold corresponding to the case where the resource type is unlicensed resource.

[0194] In other embodiments, the first parameter can be used to instruct the first terminal device to determine a second link selection threshold in the case where the resource type is licensed resource.

[0195] For example, the first parameter can include a second link selection threshold corresponding to licensed resource.

[0196] Further, the second link selection threshold can include a second sidelink priority threshold and a second non-sidelink priority threshold, the first parameter can include a fourth parameter for determining the second sidelink priority threshold, and a fourth parameter for determining the second non-sidelink priority threshold.

[0197] For example, the first parameter can include a second sidelink priority threshold and a second non-sidelink priority threshold corresponding to a case where the resource type is a licensed resource.

[0198] In some embodiments, the first parameter can also be used to indicate that the first terminal device determines a first link selection threshold in a case where the resource type is a non-licensed resource, and a second link selection threshold in a case where the resource type is a licensed resource.

[0199] Further, the first link selection threshold can include a first sidelink priority threshold and a first non-sidelink priority threshold, and the second link selection threshold can also include a second sidelink priority threshold and a second non-sidelink priority threshold.

[0200] In some embodiments, the sidelink is a communication link between the first terminal device and another terminal device, and the non-sidelink is an uplink between the first terminal device and the access network device.

[0201] In some embodiments, the access network device can send the first parameter to the terminal device (e.g., the first terminal device or the second terminal device) through one or more of a system message and an RRC message.

[0202] For example, the access network device can send the first parameter to the terminal device through SIB12 (System Information Block 12) or other SIB messages in a system message.

[0203] For another example, the access network device can send the first parameter to the terminal device through an RRC reconfiguration message (RRC Reconfiguration) or other RRC messages.

[0204] It should be noted that in this embodiment, the first terminal device determines the target link selection threshold corresponding to the resource type of the sidelink, and the specific manner of determining the target link for communication according to the target link selection threshold can refer to the description in the above other embodiments, and the present disclosure will not be repeated here.

[0205] Figure 6 A link determination method according to an exemplary embodiment is shown as follows: Figure 6 The method can include:

[0206] S601, the access network device sends a first parameter to the first terminal device.

[0207] S602, the first terminal device determines a resource link correspondence relationship according to the received first parameter.

[0208] The resource link correspondence relationship includes a correspondence relationship between a resource type of the direct link and a link selection threshold.

[0209] In some embodiments, the resource link correspondence relationship can include a first link selection threshold corresponding to a case where the resource type of the direct link is unlicensed resource. The first parameter can be used to instruct the first terminal device to determine the first link selection threshold in the case where the resource type is unlicensed resource. In this way, the first terminal device can determine the first link selection threshold corresponding to the case where the resource type is unlicensed resource according to the first parameter.

[0210] Further, the first link selection threshold can include a first direct link priority threshold and a first non-direct link priority threshold, the first parameter can include a second parameter used to determine the first direct link priority threshold, and a third parameter used to determine the first non-direct link priority threshold. In this way, the first terminal device can determine the first direct link priority threshold according to the second parameter, and determine the first non-direct link priority threshold according to the third parameter.

[0211] In other embodiments, the resource link correspondence relationship can include a second link selection threshold corresponding to a case where the resource type of the direct link is licensed resource. The first parameter can be used to instruct the first terminal device to determine the second link selection threshold in the case where the resource type is licensed resource. In this way, the first terminal device can determine the second link selection threshold corresponding to the case where the resource type is licensed resource according to the first parameter.

[0212] Further, the second link selection threshold can include a second direct link priority threshold and a second non-direct link priority threshold, the first parameter can include a fourth parameter used to determine the second direct link priority threshold, and a fifth parameter used to determine the second non-direct link priority threshold. In this way, the first terminal device can determine the second direct link priority threshold according to the fourth parameter, and determine the second non-direct link priority threshold according to the fifth parameter.

[0213] In still other embodiments, the resource link correspondence relationship can include a first link selection threshold corresponding to a case where the resource type of the direct link is unlicensed resource, and a second link selection threshold corresponding to a case where the resource type of the direct link is licensed resource.

[0214] S603, in a case where it is determined that the sidelink and the non-sidelink cannot be simultaneously transmitted, the first terminal device acquires a resource type used by the sidelink.

[0215] For example, the resource type used by the sidelink can include one or more of a licensed resource and an unlicensed resource.

[0216] S604, the first terminal device determines a target link for communication from the sidelink and the non-sidelink according to the resource type.

[0217] For example, the first terminal device can determine a target link selection threshold corresponding to the resource type according to the above-mentioned resource link correspondence relationship, and determine the target link according to the target link selection threshold.

[0218] It should be noted that the specific manner in which the first terminal device determines the target link can refer to the description in the above embodiments, which will not be described here.

[0219] With the above method, the first terminal device can determine the resource link correspondence relationship according to the first parameter sent by the access network device, and in a case where it is determined that the sidelink and the non-sidelink cannot be simultaneously transmitted, acquire a resource type used by the sidelink; and determine a target link for communication from the sidelink and the non-sidelink according to the resource type. In this way, the target link can be selected according to the resource type, so that the problem of sidelink transmission failure caused by unreasonable link selection can be avoided.

[0220] Figure 7 is a block diagram of a link determination apparatus 700 according to an example embodiment, applied to a first terminal device, as shown in the figure, the apparatus 700 can include: Figure 7

[0221] A first determination module 701 is configured to, in a case where it is determined that a sidelink and a non-sidelink of the first terminal device cannot be simultaneously transmitted, determine a resource type corresponding to the sidelink.

[0222] A second determination module 702 is configured to determine a target link for communication from the sidelink and the non-sidelink according to the resource type.

[0223] In some embodiments, the second determination module 702 is configured to determine a target link selection threshold according to the resource type of the sidelink; wherein different resource types correspond to different link selection thresholds; and determine the target link according to the target link selection threshold.

[0224] ​In some embodiments, the second determining module 702 is configured to determine a target link selection threshold corresponding to the resource type according to a resource-link correspondence relationship; the resource-link correspondence relationship comprises a correspondence relationship between a resource type of the direct link and a link selection threshold.

[0225] In some embodiments, the apparatus further comprises:

[0226] Figure 8 Fig. 7 is a block diagram of a link determining apparatus 700 according to an exemplary embodiment, as shown in Figure 8 The apparatus 700 can further comprise:

[0227] The first receiving module 703 is configured to receive a first parameter sent by an access network device; the first parameter is used to instruct the first terminal device to determine a first link selection threshold in a case where the resource type is an unlicensed resource;

[0228] The second determining module 702 is configured to determine the resource-link correspondence relationship according to the first parameter.

[0229] In some embodiments, the second determining module 702 is configured to, in a case where the resource type is an unlicensed resource, determine, according to the resource-link correspondence relationship, a first link selection threshold corresponding to the unlicensed resource as the target link selection threshold.

[0230] In some embodiments, the second determining module 702 is configured to, in a case where the resource type is an unlicensed resource and the first terminal device is not the last terminal in a channel occupancy time (COT), determine a first link selection threshold corresponding to the unlicensed resource as the target link selection threshold.

[0231] In some embodiments, the target link selection threshold comprises a target direct link priority threshold and a target non-direct link priority threshold; the second determining module 702 is configured to acquire a first logical channel priority corresponding to the direct link and a second logical channel priority corresponding to the non-direct link; and determine the target link according to the first logical channel priority, the second logical channel priority, the target direct link priority threshold and the target non-direct link priority threshold.

[0232] In some embodiments, the second determining module 702 is configured to, in a case where a first preset condition is met, determine the direct link as the target link; the first preset condition comprises that the first logical channel priority is higher than the target direct link priority threshold and the second logical channel priority is lower than the target non-direct link priority threshold.

[0233] In some embodiments, the first logical channel priority is a priority of a highest-priority logical channel among at least one logical channel corresponding to the sidelink and having data to be transmitted; and the second logical channel priority is a priority of a highest-priority logical channel among at least one logical channel corresponding to the non-sidelink and having data to be transmitted.

[0234] In some embodiments, the second determining module 702 is configured to, in a case where the resource type is an unlicensed resource, determine at least one second terminal device sharing a same channel occupancy time (COT) with the first terminal device; determine a third logical channel priority according to at least one logical channel corresponding to a sidelink of the first terminal device and the second terminal device; determine a fourth logical channel priority according to at least one logical channel corresponding to a non-sidelink of the first terminal device; and determine the target link according to the third logical channel priority and the fourth logical channel priority.

[0235] In some embodiments, the second terminal device is a terminal device sharing the same channel occupancy time (COT) with the first terminal device and not using the channel occupancy time (COT) for data transmission.

[0236] Figure 9 is a block diagram of a link determining apparatus 700 according to an exemplary embodiment, as shown in Figure 9 The apparatus 700 can further include:

[0237] The second receiving module 704 is configured to receive a fifth logical channel priority sent by the second terminal device, the fifth logical channel priority representing a priority of at least one logical channel corresponding to a sidelink of the second terminal device and having data to be transmitted.

[0238] In some embodiments, the second receiving module 704 is configured to receive resource position information sent by the second terminal device, the resource position information representing position information of the second terminal device for data transmission through the channel occupancy time (COT).

[0239] The second determining module 702 is configured to determine at least one second terminal device sharing the same channel occupancy time (COT) with the first terminal device and not using the channel occupancy time (COT) for data transmission according to the resource position information.

[0240] In some embodiments, the resource position information includes one or more of time position information and frequency position information.

[0241] In some embodiments, the second determining module 702 is configured to take the priority of the highest-priority logical channel among at least one logical channel corresponding to the sidelink of the first terminal device and the second terminal device and having data to be transmitted as the third logical channel priority.

[0242] In some embodiments, the second determining module 702 is configured to take the priority of the highest-priority logical channel among at least one logical channel corresponding to the sidelink of the first terminal device and the second terminal device and having data to be transmitted as the third logical channel priority.

[0243] In some embodiments, the sidelink is a communication link between the first terminal device and other terminal devices; and the non-sidelink is an uplink between the first terminal device and the access network device.

[0244] Figure 10 is a block diagram of a link determining apparatus 1000 according to an exemplary embodiment, applied to an access network device, such as a base station. Figure 10 As shown, the apparatus 1000 can include:

[0245] A third determining module 1001 is configured to determine a first parameter.

[0246] A first sending module 1002 is configured to send the first parameter to a first terminal device; wherein the first parameter is used to determine a first link selection threshold in a case where a resource type used by a sidelink is unlicensed resource, to instruct the first terminal device to determine a resource link correspondence relationship according to the first parameter, to determine a target link selection threshold corresponding to the resource type of the sidelink according to the resource link correspondence relationship, and to determine a target link used for communication according to the target link selection threshold.

[0247] In some embodiments, the first link selection threshold includes a first sidelink priority threshold and a first non-sidelink priority threshold; and the first parameter includes a second parameter used to determine the first sidelink priority threshold, and a third parameter used to determine the first non-sidelink priority threshold.

[0248] In some embodiments, the sidelink is a communication link between the first terminal device and other terminal devices; and the non-sidelink is an uplink between the first terminal device and the access network device.

[0249] As to the apparatus in the above embodiments, the specific manners in which various modules perform operations have been described in detail in the embodiments of the method, and will not be described here in detail.

[0250] Figure 11 is a block diagram of a link determination apparatus according to an example embodiment. The link determination apparatus 2000 can be a terminal device in the communication system 1000, or an access network device in the communication system 1000. Figure 1 The link determination apparatus 2000 can be a terminal device in the communication system 1000, or an access network device in the communication system 1000.

[0251] Referring to Figure 11 The apparatus 2000 can include one or more of the following components: a processing component 2002, a memory 2004, and a communication component 2006.

[0252] The processing component 2002 can be configured to control the overall operation of the apparatus 2000. The processing component 2002 can include one or more processors 2020 to execute instructions, for example. The instructions can be stored in a memory area (e.g., the memory 2004) to facilitate the processing component 2002 in completing the steps of the link determination method described above. Moreover, the processing component 2002 can include one or more modules to facilitate interaction with the processing component 2002. For example, the processing component 2002 can include a multimedia module to facilitate the interaction between the multimedia component and the processing component 2002.

[0253] The memory 2004 is configured to store various types of data to support the operations of the apparatus 2000. Examples of these data include instructions to operate any application or method on the apparatus 2000, contact data, phonebook data, messages, pictures, videos, and so on. The memory 2004 can be implemented by any type of volatile or non-volatile storage devices 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 memory, flash memory, magnetic disk, or optical disk.

[0254] The communication component 2006 is configured to facilitate wired or wireless communication between the apparatus 2000 and other devices. The apparatus 2000 can access a wireless network based on a communication standard, for example, Wi-Fi, 2G, 3G, 4G, 5G, 6G, NB-IOT, eMTC, or a combination thereof. In an example embodiment, the communication component 2006 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In an example embodiment, the communication component 2006 further includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0255] In an example embodiment, the apparatus 2000 can be implemented using one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic devices, to perform the above-described link determination method.

[0256] The apparatus 2000 described above can be a standalone electronic device, or a part of a standalone electronic device. For example, in an embodiment, the electronic device can be an integrated circuit (IC) or a chip. The integrated circuit can be one IC or a collection of multiple ICs. The chip can include, but is not limited to, a GPU (Graphics Processing Unit), a CPU (Central Processing Unit), an FPGA (Field Programmable Gate Array), a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a SOC (System on Chip), or the like. The integrated circuit or chip described above can execute executable instructions (or code) to implement the link determination method described above. The executable instructions can be stored in the integrated circuit or chip, or obtained from other devices or apparatuses. For example, the integrated circuit or chip can include a processor, a memory, and an interface for communicating with other devices. The executable instructions can be stored in the processor and executed by the processor to implement the link determination method described above. Alternatively, the integrated circuit or chip can receive the executable instructions via the interface and transmit the executable instructions to the processor for execution to implement the link determination method described above.

[0257] In an example embodiment, the present disclosure also provides a computer-readable storage medium having computer program instructions stored thereon, which, when executed by a processor, implement the steps of the link determination method provided by the present disclosure. For example, the computer-readable storage medium can be a non-transitory computer-readable storage medium including instructions, such as the memory 2004 described above including instructions executable by the processor 2020 of the apparatus 2000 to complete the link determination method described above. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0258] In another exemplary embodiment, there is also provided a computer program product comprising a computer program being executable by a programmable apparatus, the computer program having code portions for performing the above described link determination method when executed by the programmable apparatus.

[0259] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the disclosure being indicated by the following claims.

[0260] It is to be understood that the disclosure is not limited to the precise construction herein described and as shown in the drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the disclosure. The scope of the disclosure is limited only by the claims that follow.

Claims

1. A link determination method, characterized by, The method is applied to a first terminal device, and the method comprises: In a case where it is determined that a sidelink and a non-sidelink of the first terminal device cannot simultaneously transmit, a resource type corresponding to the sidelink is determined; the resource type comprises one or more of a licensed resource and an unlicensed resource; the resource type is a resource type of a frequency spectrum resource used by the sidelink; A target link for communication is determined from the sidelink and the non-sidelink according to the resource type.

2. The method of claim 1, wherein, The determination of the target link for communication from the sidelink and the non-sidelink according to the resource type comprises: A target link selection threshold is determined according to the resource type of the sidelink; different resource types correspond to different link selection thresholds; The target link is determined according to the target link selection threshold.

3. The method of claim 2, wherein, The determination of the target link selection threshold according to the resource type of the sidelink comprises: A target link selection threshold corresponding to the resource type is determined according to a resource-link correspondence relationship; the resource-link correspondence relationship comprises a correspondence relationship between the resource type of the sidelink and a link selection threshold.

4. The method of claim 3, wherein, The resource-link correspondence relationship is determined by: A first parameter sent by an access network device is received; the first parameter is used to instruct the first terminal device to determine a first link selection threshold in a case where the resource type is an unlicensed resource; The resource-link correspondence relationship is determined according to the first parameter.

5. The method of claim 3, wherein, The determination of the target link selection threshold corresponding to the resource type according to the resource-link correspondence relationship comprises: In a case where the resource type is an unlicensed resource, a first link selection threshold corresponding to the unlicensed resource is taken as the target link selection threshold according to the resource-link correspondence relationship.

6. The method of claim 3, wherein, The determination of the target link selection threshold corresponding to the resource type according to the resource-link correspondence relationship comprises: In a case where the resource type is an unlicensed resource and the first terminal device is not the last terminal in a channel occupancy time (COT), a first link selection threshold corresponding to the unlicensed resource is taken as the target link selection threshold.

7. The method of claim 2, wherein, The target link selection threshold comprises a target sidelink priority threshold and a target non-sidelink priority threshold; the determination of the target link according to the target link selection threshold comprises: A first logical channel priority corresponding to the sidelink and a second logical channel priority corresponding to the non-sidelink are obtained; The target link is determined according to the first logical channel priority, the second logical channel priority, the target sidelink priority threshold, and the target non-sidelink priority threshold.

8. The method of claim 7, wherein, The determination of the target link according to the first logical channel priority, the second logical channel priority, the target sidelink priority threshold, and the target non-sidelink priority threshold comprises: in a case that a first preset condition is met, taking the direct link as the target link; the first preset condition comprises that the first logical channel priority is higher than the target direct link priority threshold, and the second logical channel priority is lower than the target non-direct link priority threshold.

9. The method of claim 7, wherein, the first logical channel priority is a priority of a logical channel with a highest priority among at least one logical channel corresponding to the direct link and having data to be transmitted; the second logical channel priority is a priority of a logical channel with a highest priority among at least one logical channel corresponding to the non-direct link and having data to be transmitted.

10. The method of claim 1, wherein, the determining the target link for communication from the direct link and the non-direct link according to the resource type comprises: in a case that the resource type is an unlicensed resource, determining at least one second terminal device sharing a same channel occupancy time (COT) with the first terminal device; determining a third logical channel priority according to at least one logical channel corresponding to a direct link of the first terminal device and the second terminal device; determining a fourth logical channel priority according to at least one logical channel corresponding to a non-direct link of the first terminal device; determining the target link according to the third logical channel priority and the fourth logical channel priority.

11. The method of claim 10, wherein, the second terminal device is a terminal device sharing the same channel occupancy time (COT) with the first terminal device and not using the channel occupancy time (COT) for data transmission.

12. The method of claim 10, wherein, The method further comprises: receiving a fifth logical channel priority sent by the second terminal device, the fifth logical channel priority representing a priority of at least one logical channel corresponding to a direct link of the second terminal device and having data to be transmitted.

13. The method of claim 10, wherein, The method further comprises: receiving resource position information sent by the second terminal device, the resource position information representing position information of the second terminal device for data transmission through the channel occupancy time (COT); the determining at least one second terminal device sharing the same channel occupancy time (COT) with the first terminal device comprises: determining at least one second terminal device sharing the same channel occupancy time (COT) with the first terminal device and not using the channel occupancy time (COT) for data transmission according to the resource position information.

14. The method of claim 13, wherein, The resource position information comprises one or more of time position information and frequency position information.

15. The method of claim 10, wherein, the determining a third logical channel priority according to at least one logical channel corresponding to a direct link of the first terminal device and the second terminal device comprises: taking a priority of a logical channel with a highest priority among at least one logical channel corresponding to the direct link of the first terminal device and the second terminal device and having data to be transmitted as the third logical channel priority.

16. The method of claim 10, wherein, the determining a fourth logical channel priority according to at least one logical channel corresponding to a non-direct link of the first terminal device comprises: The priority of a highest-priority logical channel of at least one logical channel corresponding to the sidelink of the first terminal device and having data to be transmitted is determined as a fourth logical channel priority.

17. The method of any one of claims 1 to 16, wherein, The sidelink is a communication link between the first terminal device and another terminal device, and the non-sidelink is an uplink between the first terminal device and an access network device.

18. A link determination method, characterized by, The method is applied to an access network device, and the method comprises: determining a first parameter; sending the first parameter to a first terminal device; wherein the first parameter is used to determine a first link selection threshold in a case where a resource type used by a sidelink is unlicensed resource, to instruct the first terminal device to determine a resource link correspondence according to the first parameter, to determine a target link selection threshold corresponding to the resource type of the sidelink according to the resource link correspondence, and to determine a target link for communication according to the target link selection threshold; the resource type includes one or more of licensed resource and the unlicensed resource; and the resource type is a resource type of a frequency spectrum resource used by the sidelink.

19. The method of claim 18, wherein, The first link selection threshold includes a first sidelink priority threshold and a first non-sidelink priority threshold; and the first parameter includes a second parameter used to determine the first sidelink priority threshold, and a third parameter used to determine the first non-sidelink priority threshold.

20. The method of claim 18 or 19, wherein, The sidelink is a communication link between the first terminal device and another terminal device, and the non-sidelink is an uplink between the first terminal device and the access network device.

21. A link determination apparatus characterized by comprising: The apparatus is applied to a first terminal device, and the apparatus comprises: a first determination module configured to, in a case where a sidelink and a non-sidelink of the first terminal device cannot be transmitted at the same time, determine a resource type corresponding to the sidelink; the resource type includes one or more of licensed resource and unlicensed resource, and the resource type is a resource type of a frequency spectrum resource used by the sidelink; a second determination module configured to determine a target link for communication from the sidelink and the non-sidelink according to the resource type.

22. A link determination apparatus characterized by comprising: The apparatus is applied to an access network device, and the apparatus comprises: a third determination module configured to determine a first parameter; a first sending module configured to send the first parameter to a first terminal device; wherein the first parameter is used to determine a first link selection threshold in a case where a resource type used by a sidelink is unlicensed resource, to instruct the first terminal device to determine a resource link correspondence according to the first parameter, to determine a target link selection threshold corresponding to the resource type of the sidelink according to the resource link correspondence, and to determine a target link for communication according to the target link selection threshold; the resource type includes one or more of licensed resource and the unlicensed resource; and the resource type is a resource type of a frequency spectrum resource used by the sidelink.

23. A link determination apparatus characterized by comprising: The apparatus comprises: a processor; and a memory for storing processor-executable instructions; wherein the processor is configured to perform the steps of the method of any one of claims 1 to 17, or the processor is configured to perform the steps of the method of any one of claims 18 to 20.

24. A computer-readable storage medium having stored thereon computer program instructions, wherein, the computer program instructions, when executed by a processor, implement the steps of the method of any one of claims 1 to 17, or the computer program instructions, when executed by a processor, implement the steps of the method of any one of claims 18 to 20.

25. A chip, characterized by comprising a processor and an interface; the processor is configured to read instructions to perform the steps of the method of any one of claims 1 to 17, or the processor is configured to read instructions to perform the steps of the method of any one of claims 18 to 20.

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