LINK SELECTION METHOD AND APPARATUS, AND COMPUTER-READABLE STORAGE MEDIUM.

Abstract

A link selection method and device, and a computer-readable storage medium, are disclosed. A STA sends a link selection indication to an AP. The STA associates with the AP, and there are multiple links between the STA and the AP. These links are on different channels. The link selection indication specifies a target link corresponding to a target service type. The target link includes at least one of the multiple links. In this request, the STA can select, for different service types, a suitable link from the multiple links for transmitting the corresponding service data, thus achieving different QoS guarantees for different service types and increasing the reliability of service operation in a WLAN.

Description

LINK SELECTION METHOD AND APPARATUS, AND COMPUTER-READABLE STORAGE MEDIUM This application claims priority to Chinese Patent Application No. 202010505315.7, filed on June 5, 2020, entitled “LINK SELECTION METHOD AND APPARATUS, AND COMPUTER READABLE STORAGE MEDIUM”, which is incorporated herein by reference in its entirety. TECHNICAL FIELD This application relates to the field of wireless communication technologies, and in particular to a link selection method and apparatus, and to a computer-readable storage medium. BACKGROUND OF THE INVENTION A wireless local area network (WLAN) includes an access point (AP) and a station (STA). The AP acts as a bridge between the WLAN and another type of network (for example, a wired network). The STA is a wireless terminal configured with WLAN access capabilities, such as a smartphone or laptop computer. Currently, if there is a plurality of links between the AP and the STA, the way in which to select an appropriate link from the plurality of links between the AP and the STA for service data transmission is a problem that needs to be solved. BRIEF DESCRIPTION OF THE INVENTION This application provides a link selection method and apparatus, and a computer-readable storage medium. According to the first aspect, a link selection method is provided and applied to a wireless local area network. The method includes: A STA sends a link selection indication to an AP. The STA associates with the AP, and there are multiple links between the STA and the AP. These links are located separately on multiple different channels. The link selection indication specifies a target link corresponding to a target service type. The target link includes at least one of the multiple links. In this application, the STA can select, for different types of services, a suitable link from the plurality of links for the corresponding service data transmission, so that different QoS guarantees are obtained for services of different service types, increasing the reliability of service operation in a WLAN. Optionally, after sending the link selection indication to the AP, the STA receives a scheduling frame from the AP on the target link. Subsequently, the STA sends service data of the target service type to the AP on the target link, based on the scheduling frame. In this request, the AP schedules a service of a corresponding service type on the link selected by the STA, so that different QoS guarantees are obtained for services of different service types, increasing the reliability of service operation in the WLAN. Optionally, the programming plot includes an indication of the target service type. Optionally, the STA receives a link selection request sent by the AP, where the link selection request asks the STA to send the link selection indication. In this request, the STA passively performs the link selection triggered by the link selection request sent by the AP. Optionally, the link selection request includes a service type identity of the target service type and / or a link identity of a recommended link. In this request, the service type identity of the target service type is included in the link selection request, so the AP triggers the STA to perform link selection for the target service type. The link identity of the recommended link is also included in the link selection request, instructing the STA to perform link selection on the recommended link or to preferentially select the recommended link. This can improve link selection reliability and further enhance the reliability of service data transmission from the STA to the AP. Optionally, the link selection request is found in a buffer status report (BSRP) query line frame sent by the AP to the STA. In this request, the link selection request is included in the BSRP frame; that is, the BSRP frame is reused without sending the link selection request separately. This saves transmission resources. Optionally, the link selection indication is found in a buffer status report (BSR) field sent by the STA to the AP. In this request, the link selection indication is included in the BSR field; that is, the BSR field is reused without sending the link selection indication separately. This saves transmission resources. Optionally, the target link is determined based on link quality information from the plurality of links and the target service type, and the link quality information includes at least one of a bandwidth, transmission delay, or packet loss rate. According to a second aspect, a link selection method is provided, and it is applied to a wireless local area network. The method includes: An AP receives an indication MA / E / ZUZO / U1 Ί Ί Ί Link selection signal sent by an STA. The STA is associated with the AP. There is a plurality of links between the STA and the AP. The plurality of links are located separately on a plurality of different channels. The link selection signal indicates a target link that corresponds to a target service type. The target link includes at least one of the plurality of links. Optionally, after receiving the link selection indication sent by the STA, the AP sends a scheduling frame to the STA on the target link. Optionally, the programming plot includes an indication of the target service type. Optionally, the AP sends a link selection request to the STA, where the link selection request asks the STA to send the link selection indication. Optionally, the link selection request includes a service type identity of the target service type and / or a link identity of a recommended link. Optionally, the link selection request is contained in a BSRP frame sent by the AP to the STA. Optionally, the link selection indication is found in a BSR field sent by the STA to the AP. According to a third aspect, a link selection apparatus is provided. The apparatus includes a plurality of functional modules. The plurality of functional modules interact with each other to implement the method according to the first aspect and the implementations of the first aspect. The plurality of functional modules can be implemented based on software, hardware, or a combination of software and hardware, and the plurality of functional modules can be combined or divided randomly based on the specific implementation. According to a fourth aspect, a link selection apparatus is provided. The apparatus includes a plurality of functional modules. The plurality of functional modules interact with each other to implement the method in the second aspect and the implementations of the second aspect. The plurality of functional modules can be implemented based on software, hardware, or a combination of software and hardware, and the plurality of functional modules can be combined or divided randomly based on the specific implementation. According to a fifth aspect, an STA is provided, which includes a processor and a transceiver. The transceiver operates on a plurality of different channels. The transceiver is configured to perform receive and send actions on one or more channels under the control of the processor, to implement the link selection method according to any implementation of the first aspect. Optionally, the transceiver includes a plurality of radio frequency circuits, and the plurality of radio frequency circuits operate separately on the plurality of channels IVIA / E / ZUZO / UIII different IO. According to a sixth aspect, an AP is provided, which includes a processor and a transceiver. The transceiver operates on a plurality of different channels. The transceiver is configured to perform receive and send actions on one or more channels under the control of the processor, to implement the link selection method according to any implementation of the second aspect. Optionally, the transceiver includes a plurality of radio frequency circuits, and the plurality of radio frequency circuits operate separately on the plurality of different channels. According to a seventh aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores instructions. When the instructions are executed by a processor in a computing device, the link selection method is implemented according to either the first or second aspect. According to an eighth aspect, a WLAN is provided, which includes a STA and an AP. The STA is associated with the AP. There is a plurality of links between the STA and the AP. The plurality of links are located separately on a plurality of different channels. The STA includes the link selection device according to the third aspect or is the STA according to the fifth aspect. The AP includes the link selection device according to the fourth aspect or is the AP according to the sixth aspect. According to a ninth aspect, a chip is provided. The chip includes a programmable logic circuit and / or program instructions. When the chip is executed, the method in the first aspect and the implementations of the first aspect or the second aspect and the implementations of the second aspect are implemented. The beneficial effects provided by the technical solutions provided in this application include at least the following. In this request, there are multiple links between the STA and the AP. The STA can select, for different service types, a suitable link from this plurality for transmitting the corresponding service data. The AP then schedules a service of the corresponding service type on the link selected by the STA. This provides different QoS guarantees for services of different service types, increasing the reliability of service operation in a WLAN. Furthermore, the service type identifier of the target service type is included in the link selection request sent by the AP to the STA, so the AP prompts the STA to perform the link selection for the target service type.The link identity of the recommended link is included in the link selection request to instruct the STA to perform the link selection on the recommended link or to preferentially select the recommended link. This can improve link selection reliability and further enhance the reliability of service data transmission. MA / E / ZUZO / U1 Ί Ί Ί Or by the STA to the AP. BRIEF DESCRIPTION OF THE DRAWINGS FIGURE 1 is a schematic diagram of a WLAN structure according to one modality of this application. FIGURE 2 is a schematic diagram of a connection between an AP and an STA according to one modality of this request. FIGURE 3 is a schematic flowchart of a link selection method according to one modality of this request. FIGURE 4 is a schematic diagram of an activation frame structure defined in the IEEE 802.11ax draft. FIGURE 5 is a schematic diagram of a common information field structure dependent on activation according to a modality of this request. FIGURE 6 is a schematic diagram of a structure of another common information field dependent on activation according to a modality of this request. FIGURE 7 is a schematic diagram of a TLM information field according to one modality of this request. FIGURE 8 is a schematic diagram of another TLM information field according to one modality of this request. FIGURE 9 is a schematic diagram of an expanded BSR field structure according to one modality of this application. FIGURE 10 is a schematic diagram of a link selection apparatus structure according to one modality of this application. FIGURE 11 is a schematic diagram of a structure of another link selection apparatus according to one modality of this application. FIGURE 12 is a block diagram of a link selection device according to one modality of this application. DETAILED DESCRIPTION OF THE MODALITIES To clarify the objectives, technical solutions, and advantages of this application, the following further describes in detail the implementations of this application with reference to the accompanying drawings. Figure 1 is a schematic diagram of a WLAN structure according to one modality of this application. As shown in Figure 1, the WLAN includes one AP 101 and STAs 102A through 102C (collectively referred to as STAs 102). STA 102 is associated with AP 101. The association of STA 102 with AP 101 means that STA 102 connects wirelessly to AP 101; that is, STA 102 can communicate wirelessly with AP 101. AP 101 provides a wireless access service based on the WLAN protocol for STA 102. The number of APs and STAs shown in the figure is merely illustrative. MA / E / ZUZo / U11110 for description and do not intend to limit a link selection system provided in the modalities of this application. A multi-link network architecture is provided in the IEEE 802.11be draft (which is a next-generation protocol of the IEEE 802.11ax draft). Both the access point (AP) and the stator (STA) include a plurality of radio frequency units (RFUs). An RFU is an electronic component that transmits a radio signal between transceiver devices and may also be called a radio frequency circuit or radio frequency module. Different RFUs operate in different frequency bands or on different channels within the same frequency band. An RFU in an AP can independently establish connections with the RFUs of multiple stators, and an RFU in a stator can establish a connection with an RFU in an AP.Connections can be established between multiple RFUs of an AP and multiple RFUs of a STA; that is, multiple links can be established between the AP and the STA on multiple channels. In this application, there are multiple links between AP 101 and STA 102. These links are located on multiple different channels. A channel is a full WLAN channel, for example, a 20 MHz WLAN channel or a WLAN channel with a larger bandwidth (for example, 40 MHz, 80 MHz, or 160 MHz). If the channel bandwidth is greater than 20 MHz, the channel may include a primary channel and a secondary channel. The radio frequency ranges used by the WLAN are the 2.4 gigahertz (GHz) frequency band and the 5 GHz frequency band. The 2.4 GHz frequency band includes frequencies from 2.4 GHz to 2.4835 GHz, and the 5 GHz frequency band includes frequencies from 5.150 GHz to 5.350 GHz and from 5.725 GHz to 5.850 GHz. The multiple links between AP 101 and STA 102 are separated into multiple different channels in the 2.4 GHz and / or 5 GHz frequency bands. For example, there are two links between AP 101 and STA 102: one link is in the 2.4 GHz frequency band and one link is in the 5 GHz frequency band. or two links in the 2.4 GHz frequency band, where one link is on channel 1 in the 2.4 GHz frequency band and the other link is on channel 11 in the 2.4 GHz frequency band; or two links on different channels in the 5 GHz frequency band. For example, FIGURE 2 is a schematic diagram of a connection between an AP and an STA according to one modality of this application. As shown in FIGURE 2, AP 101 includes an RFU 11 operating in the 2.4 GHz frequency band and an RFU 12 operating in the 5 GHz frequency band. STA 102 includes an RFU 21 operating in the 2.4 GHz frequency band and an RFU 22 operating in the 5 GHz frequency band. The RFU 11 in AP 101 connects to the RFU 21 in STA 102, and the RFU 12 in AP 101 connects to the RFU 22 in STA 102. In other words, there is a link 1 in the frequency band. ML / t / ZUZj / UI 1110 A link selection for a plurality of service types, the AP sends a plurality of link selection requests to the STA, where each link selection request asks the STA to perform a link selection for a service type; or the AP sends a single link selection request to the STA, where the link selection request asks the STA to perform the link selection for a plurality of service types. A format of the link selection request can be shown in FIGURE 5 or FIGURE 6. Alternatively, a plurality of common information fields can be expanded into an activation frame, and an activation-dependent common information field in each common information field carries a request to perform the link selection for a service type. Optionally, the link selection indication is located in a BSR field sent by the STA to the AP. The BSR field can be a field in a null frame or a data frame. In this mode of this request, the link selection indication is included in the BSR field; that is, the BSR field is reused without sending the link selection indication separately. This saves transmission resources. In this application form, the link indication field can be expanded in the BSR field. In combination with an access category indication (ACI) bitmap and a Delta TID in the BSR field, the link indication field provides an indication for link selection for the STA. For example, Figure 9 is a schematic diagram of an expanded BSR field structure according to one modality of this request. As shown in Figure 9, the BSR field includes an ACI bitmap field, a Delta TID field, a high ACI field, a scaling factor field, a high queue size field (indicating data traffic from an AC specified in a high ACI parameter), a queue size all field (indicating a data amount from all ACs specified in an ACI bitmap parameter), and a link indication field. For a structure and definition of the link indication field, see the related descriptions of the link indication field in the TLM information field. Explanations of other fields in the BSR field are not described individually in this modality of this request. Alternatively, the link selection indication can be included in a custom frame and is sent separately by the STAal AP. For a format of the link selection indication in the custom frame, see the TLM information field format shown in FIGURE 5 or FIGURE 6. Details are not described herein in this application. A sequence of steps in the link selection method provided in this modality of this application may be appropriately adjusted, or steps may be added or removed accordingly as required. Any variation method easily Any material discovered by a person skilled in the art within the technical scope described in this application shall fall within the scope of protection of this application. Therefore, the details are not described. In conclusion, the link selection method provided in this application involves multiple links between the STA and the AP. The STA can select a suitable link from this pool for different service types to transmit data. The AP then schedules a service of the corresponding service type on the link selected by the STA. This provides different QoS guarantees for different service types, increasing service reliability in a WLAN. Furthermore, the service type identifier of the target service type is included in the link selection request sent by the AP to the STA, prompting the AP to initiate link selection for the target service type.The link identity of the recommended link is included in the link selection request to instruct the STA to perform the link selection on the recommended link or to preferentially select the recommended link. This can improve link selection reliability and further enhance the reliability of service data transmission from the STA to the AP. Figure 10 is a schematic diagram of a link selection device structure according to one modality of this application. The device can be used in STA 102 on the WLAN shown in Figure 1. As shown in Figure 10, the device includes: A 1001 sending module, configured to send a link selection indication to an AP, where the STA is associated with the AP, there are a plurality of links between the STA and the AP, the plurality of links are located separately on a plurality of different channels, the link selection indication indicates a target link that corresponds to a target service type, and the target link includes at least one of the plurality of links. Optionally, you can also refer to FIGURE 10. The device 100 also includes a receiving module 1002. Optionally, the receive module 1002 is configured to receive, on the target link, a programming frame sent by the AP. The send module 1001 is also configured to send, on the target link, service data of the target service type to the AP based on the programming frame. Optionally, the programming plot includes an indication of the target service type. Optionally, the 1002 receiver module is configured to receive a link selection request sent by the AP, where the link selection request asks the STA to send the link selection indication. Optionally, the link selection request includes an identity of type MA / E / ZUZo / U11110 service of the target service type and / or a link identity of a recommended link. Optionally, the link selection request is contained in a BSRP frame sent by the AP to the STA. Optionally, the link selection indication is found in a BSR field sent by the STA to the AP. Optionally, the target link is determined based on link quality information from the plurality of links and the target service type, and the link quality information includes at least one of a bandwidth, transmission delay, or packet loss rate. In conclusion, the link selection mechanism provided in this application involves multiple links between the STA and the AP. The STA can select a suitable link from this range for different service types to transmit data. The AP then schedules a service of the corresponding service type on the link selected by the STA. This provides different QoS guarantees for different service types, increasing service reliability on the WLAN. Furthermore, the service type identifier of the target service type is included in the link selection request sent by the AP to the STA, prompting the AP to instruct the STA to perform link selection for the target service type.The link identity of the recommended link is included in the link selection request to instruct the STA to perform the link selection on the recommended link or to preferentially select the recommended link. This can improve link selection reliability and further enhance the reliability of service data transmission from the STA to the AP. Figure 11 is a schematic diagram of another link selection device structure according to one modality of this application. The device can be used in AP 101 on the WLAN shown in Figure 1. As shown in Figure 11, device 110 includes: A receiver module 1101, configured to receive a link selection indication sent by an STA, wherein the STA is associated with the AP, there is a plurality of links between the STA and the AP, the plurality of links are on different channels, the link selection indication indicates a target link that corresponds to a target service type, and the target link comprises at least one of the plurality of links. Optionally, you can also refer to FIGURE 11. Appliance 100 also includes a shipping module 1102. Optionally, the 1102 sending module is configured to send, on the target link, a programming frame to the STA. Optionally, the programming plot includes an indication of the target service type. IVIA / E / ZUZÓ / UIII IO Optionally, the 1102 dispatch module is configured to send a link selection request to the STA, where the link selection request asks the STA to send the link selection indication. Optionally, the link selection request includes a service type identity of the target service type and / or a link identity of a recommended link. Optionally, the link selection request is contained in a BSRP frame sent by the AP to the STA. Optionally, the link selection indication is found in a BSR field sent by the STA to the AP. In conclusion, the link selection mechanism provided in this application involves multiple links between the STA and the AP. The STA can select a suitable link from this range for different service types to transmit data. The AP then schedules a service of the corresponding service type on the link selected by the STA. This provides different QoS guarantees for different service types, increasing service reliability on the WLAN. Furthermore, the service type identifier of the target service type is included in the link selection request sent by the AP to the STA, prompting the AP to instruct the STA to perform link selection for the target service type.The link identity of the recommended link is included in the link selection request to instruct the STA to perform the link selection on the recommended link or to preferentially select the recommended link. This can improve link selection reliability and further enhance the reliability of service data transmission from the STA to the AP. For the device in the previous configuration, the specific ways of performing operations for each module are described in detail in the configurations related to the method. No such details are described here. One embodiment of this application provides a STA, which includes a processor and a transceiver. The transceiver operates on multiple different channels. The transceiver is configured to perform receive and transmit actions on one or more channels under the control of the processor, to implement actions performed by the STA in the embodiments of the preceding method. Optionally, the transceiver includes multiple radio frequency circuits, and the multiple radio frequency circuits operate separately on multiple different channels. One modality of this application provides an AP, which includes a processor and a transceiver. The transceiver operates on multiple different channels. The transceiver is configured to perform receive and transmit actions on one or more channels under the control of the processor, to implement actions performed by the AP in the modalities of the previous method. Optionally, the transceiver includes multiple radio frequency circuits, and either the transceiver or the multiple radio frequency circuits operate separately on multiple different channels. For example, FIGURE 12 is a block diagram of a link selection device according to one modality of this application. The device may be a STA or an AP. As shown in FIGURE 12, the device 120 includes a processor 1201 and a transceiver 1202. The transceiver 1202 operates on a plurality of different channels. The 1202 transceiver is configured to perform receive and send actions on one or more channels under the control of the 1201 processor, to implement actions performed by the AP or STA in the modes of the previous method. Optionally, the 1202 transceiver includes a plurality of radio frequency circuits, and the plurality of radio frequency circuits operate separately on a plurality of different channels. For example, see FIGURE 2. An AP 101 transceiver includes RFU 11 and RFU 12, and RFU 11 and RFU 12 operate on different channels. An STA 102 transceiver includes RFU 21 and RFU 22, and RFU 21 and RFU 22 operate on different channels. Optionally, the device 120 also includes a memory 1203, a communication bus 1204, and a communication interface 1205. Memory 1203 is configured to store a computer program, where the computer program includes program instructions. Processor 1201 is configured to invoke the computer program stored in memory 1203, to control transceiver 1202 to perform receive and transmit actions. Processor 1201 includes one or more processing cores, and it executes various functional applications and performs data processing while running the computer program. Optionally, memory 1203 can store an operating system and an application program unit for at least one function. The operating system can be a system such as a Real Time Executive (RTX), Linux, Unix, Windows, or macOS. There can be multiple 1205 communication interfaces for communicating with another device. For example, in this application mode, the STA's 1205 communication interface can be configured to send a link selection indication to the AP. Transceiver 1202, memory 1203, and communication interface 1205 are connected to processor 1201 via communication bus 1204. One modality of this application also provides a computer-readable storage medium. The computer-readable storage medium stores instructions. When the instructions are executed by a processor in a computing device, actions performed by the AP or STA in the modalities of the previous method are implemented. ML / E / ZuZo / u 1110 A person with ordinary experience in the technique can understand that all or some of the stages of the method's modalities can be implemented by hardware or a program that instructs related hardware. The program can be stored on a computer-readable storage medium. The storage medium can be a read-only memory, a magnetic disk, an optical disk, or similar. In the forms of this application, the terms first, second, and third are used simply for descriptive purposes and should not be construed as indicating or implying relative importance. The term "at least one" refers to one or more, "at least one group" refers to one or more groups, and so on. The term "and / or" in this application describes only one association relationship to describe associated objects and represents that three relationships can exist. For example, A and / or B can represent the following three cases: Only A exists, both A and B exist, and only B exists. Furthermore, the character 7 in this specification generally represents an "or" relationship between associated objects. The descriptions above are merely optional aspects of this application and are not intended to limit it. Any modification, equivalent replacement, or improvement made to the concept and principle of this application shall be included within the scope of protection of this application.

Claims

1. A link selection method applicable to a wireless local area network, characterized in that the method comprises: sending, by means of a station (STA), a link selection indication to an access point (AP), wherein the STA is associated with the AP, there is a plurality of links between the STA and the AP, the plurality of links are on different channels, the link selection indication indicates a target link corresponding to a target service type, and the target link comprises at least one of the plurality of links.

2. The method according to claim 1, characterized in that after the STA sends the link selection indication to the AP, the method further comprises: receiving, by means of the STA on the target link, a programming frame sent by the AP; and sending, by means of the STA on the target link, service data of the target service type to the AP based on the programming frame.

3. The method according to claim 2, characterized in that the programming plot comprises an indication of the target service type:

4. The method according to any of claims 1 to 3, characterized in that the method further comprises: receiving, by means of the STA, a link selection request sent by the AP, wherein the link selection request requests the STA to send the link selection indication.

5. The method according to claim 4, characterized in that the link selection request comprises a service type identity of the target service type and / or a link identity of a recommended link.

6. The method according to claim 4 or 5, characterized in that the link selection request is located in a buffer status report (BSRP) query line frame sent by the AP to the STA.

7. The method in accordance with any of claims 1 or 6, characterized in that the link selection indication is located in a buffer status report (BSR) field sent by the STA to the AP.

8. The method according to any of claims 1 to 7, characterized in that the target link is determined based on the link quality information of the link plurality and the target service type, and the link quality information comprises at least one of a bandwidth, a transmission delay, or a packet loss rate.

9. A link selection method, applicable to a wireless local area network, characterized in that the method comprises: receiving, by means of an access point (AP), a link selection indication ML / E / ZuZo / u1110 sent by a station (STA), wherein the STA is associated with the AP, there is a plurality of links between the STA and the AP, the plurality of links are on different channels, the link selection indication indicates a target link that corresponds to a target service type, and the target link comprises at least one of the plurality of links.

10. The method according to claim 9, characterized in that after the AP receives the link selection indication sent by the STA, the method further comprises: sending, by means of the AP on the target link, a programming frame to the STA.

11. The method according to claim 10, characterized in that the programming plot comprises an indication of the target service type:

12. The method according to any of claims 9 to 11, characterized in that the method further comprises: sending, by means of the AP, a link selection request to the STA, wherein the link selection request requests the STA to send the link selection indication.

13. The method according to claim 12, characterized in that the link selection request comprises a service type identity of the target service type and / or a link identity of a recommended link.

14. The method according to claim 12 or 13, characterized in that the link selection request is in a buffer status report (BSRP) query line frame sent by the AP to the STA.

15. The method according to any of claims 9 or 14, characterized in that the link selection indication is located in a buffer status report (BSR) field sent by the STA to the AP.

16. A link selection apparatus, used in a station (STA) in a wireless local area network, characterized in that the apparatus comprises: a sending module, configured to send a link selection indication to an access point (AP), wherein the STA is associated with the AP, there is a plurality of links between the STA and the AP, the plurality of links are on different channels, the link selection indication indicates a target link corresponding to a target service type, and the target link comprises at least one of the plurality of links.

17. The apparatus according to claim 16, characterized in that the apparatus further comprises: a receiving module, configured to receive, on the target link, a programming frame sent by the AP; and the sending module is further configured to send service data of the target service type to the AP on the target link based on the programming frame.

18. The apparatus according to claim 17, characterized in that the programming plot comprises an indication of the target service type: ML / E / ZuZo / u 1110 19. The apparatus according to any of claims 16 to 18, characterized in that the apparatus further comprises: the receiving module, configured to receive a link selection request sent by the AP, wherein the link selection request requests the STA to send the link selection indication.

20. The apparatus according to claim 19, characterized in that the link selection request comprises a service type identity of the target service type and / or a link identity of a recommended link.

21. The apparatus according to claim 19 or 20, characterized in that the link selection request is located in a buffer status report (BSRP) query line frame sent by the AP to the STA.

22. The apparatus according to any of claims 16 or 21, characterized in that the link selection indication is located in a buffer status report (BSR) field sent by the STA to the AP.

23. The apparatus according to any of claims 16 to 22, characterized in that the target link is determined based on the link quality information of the link plurality and the target service type, and the link quality information comprises at least one of a bandwidth, a transmission delay, or a packet loss rate.

24. A link selection apparatus, used in an access point (AP) in a wireless local area network, characterized in that the apparatus comprises: a receiving module, configured to receive a link selection indication sent by a station (STA), wherein the STA is associated with the AP, there is a plurality of links between the STA and the AP, the plurality of links are on different channels, the link selection indication indicates a target link corresponding to a target service type, and the target link comprises at least one of the plurality of links.

25. The apparatus according to claim 24, characterized in that the apparatus further comprises: a sending module, configured to send, on the target link, a programming frame to the STA.

26. The apparatus according to claim 25, characterized in that the programming plot comprises an indication of the target service type:

27. The apparatus according to any of claims 24 to 26, characterized in that the apparatus further comprises: the sending module, configured to send a link selection request to the STA, wherein the link selection request requests the STA to send the link selection indication.

28. The apparatus according to claim 27, characterized in that the IVIA / E / ZUZÓ / UIII IO link selection request comprises a service type identity of the target service type and / or a link identity of a recommended link.

29. The apparatus according to claim 27 or 28, characterized in that the link selection request is located in a buffer status report (BSRP) query line frame sent by the AP to the STA.

30. The apparatus according to any of claims 24 or 29, characterized in that the link selection indication is located in a buffer status report (BSR) field sent by the STA to the AP.

31. A station (STA), characterized in that it comprises a processor and a transceiver, wherein the transceiver operates on a plurality of different channels; and the transceiver is configured to perform receive and send actions on one or more channels under the control of the processor, to implement the link selection method according to any one of claims 1 to 8.

32. The STA according to claim 31, characterized in that the transceiver comprises a plurality of radio frequency circuits, and the plurality of radio frequency circuits operate in a plurality of different channels.

33. An access point (AP), characterized in that it comprises a processor and a transceiver, wherein the transceiver operates on a plurality of different channels; and the transceiver is configured to perform receive and send actions on one or more channels under the control of the processor, to implement the link selection method according to any of claims 9 to 15.

34. The AP according to claim 33, characterized in that the transceiver comprises a plurality of radio frequency circuits, and the plurality of radio frequency circuits operate in a plurality of different channels.

35. A computer-readable storage medium, characterized in that the computer-readable storage medium stores instructions, and when the instructions are executed by a processor of a computing device, the link selection method is implemented according to any one of claims 1 to 15.

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