CN115623610A

CN115623610A - Method, system, device and storage medium for establishing direct connection link

Info

Publication number: CN115623610A
Application number: CN202110800213.2A
Authority: CN
Inventors: 吴昊; 王鑫
Original assignee: Chengdu Jimi Technology Co Ltd
Current assignee: Chengdu Jimi Technology Co Ltd
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2023-01-17

Abstract

The invention discloses a method, a system, equipment and a storage medium for establishing a direct connection link. The method comprises the following steps: receiving a direct link establishment request message sent by a first terminal device, and if a target address contained in the received direct link establishment request message is an address of a second terminal device, sending the direct link establishment request message to the second terminal device on any one link connected with the second terminal device; and receiving a direct connection link establishment response message sent by the second terminal equipment, and sending the direct connection link establishment response message to the first terminal equipment. According to the invention, through unified discovery and establishment processes, a plurality of logic entities of the terminal equipment can coordinate whether to establish the direct connection link, how many direct connection links are established, and the direct connection links between the terminal equipment are dynamically configured, so that the use efficiency of wireless resources is effectively improved, the data transmission rate is further improved, and the transmission delay is reduced.

Description

Method, system, device and storage medium for establishing direct connection link

Technical Field

The present invention relates to the field of wireless communications, and in particular, to a method, system, device, and storage medium for establishing a direct link.

Background

802.11be networks, also known as Extreme High Throughput (EHT) networks, are enhanced by a range of system features and a variety of mechanisms to achieve very High Throughput. As the use of Wireless Local Area Networks (WLANs) continues to grow, it becomes increasingly important to provide wireless data services in many environments, such as homes, businesses, and hot spots. In particular, video traffic will continue to be the dominant type of traffic in many WLAN deployments. With the advent of 4k and 8k video (uncompressed rates of 20 Gbps), the throughput requirements for these applications are constantly evolving. New high throughput, low latency applications such as virtual reality or augmented reality, gaming, remote offices, and cloud computing will proliferate (e.g., latency for real-time gaming below 5 milliseconds).

In view of the high throughput and stringent real-time latency requirements of these applications, users expect higher throughput, higher reliability, less latency and jitter, and higher power efficiency when supporting their applications over a WLAN. Users desire improved integration with Time Sensitive Networks (TSNs) to support applications on heterogeneous ethernet and wireless LANs. 802.11be networks aim to ensure the competitiveness of WLANs by further increasing overall throughput and reducing latency, while ensuring backward compatibility and coexistence with legacy technology standards. 802.11 compatible devices operating in the 2.4GHz,5GHz and 6GHz bands.

Disclosure of Invention

The direct connection link, also called as a direct connection link (TDLS), can be established between the terminal devices to reduce the data transmission transfer link, improve the transmission rate and reduce the transmission delay. After introducing multilink techniques, a multilink capable device may operate on more than two links simultaneously. The terminal equipment with the multilink capability can establish a plurality of direct connection links, and the transmission rate is improved to a greater extent and the transmission delay is reduced by simultaneously using the multilink technology and the direct connection link technology. However, in the prior art, a direct link can be established only based on a single link, and when multiple links of a terminal device establish a direct link independently on each link according to the prior art, although the transmission rate is improved to a certain extent, due to independent establishment among multiple links, only link-level negotiation exists among multiple links, and device-level negotiation cannot be performed. In view of this, embodiments of the present invention provide a method, a system, a device, and a storage medium for establishing a direct link.

In a first aspect, an embodiment of the present invention provides a method for establishing a direct connection link, including:

receiving a direct link establishment request message sent by a first terminal device, wherein the direct link establishment request message comprises address information and a multilink information element, the multilink information element comprises multilink information element types and information of one or more links, the address information in the direct link establishment request message sent by the first terminal device comprises a first target address, and if the first target address contained in the received direct link establishment request message is the address of a second terminal device, the direct link establishment request message is sent to the second terminal device on any one link connected with the second terminal device;

receiving a direct link establishment response message sent by a second terminal device, wherein the direct link establishment response message comprises address information and multilink information elements, the address information in the direct link establishment response message sent by the second terminal device comprises a second target address, and if the second target address contained in the received direct link establishment response message is the address of the first terminal device, sending the direct link establishment response message to the first terminal device on any link connected with the first terminal device.

In a second aspect, an embodiment of the present invention provides a method for establishing a direct link, including:

the method comprises the steps that a first terminal device sends a direct connection link establishment request message to an access device, wherein the direct connection link establishment request message comprises address information and a multilink information element, and the multilink information element comprises multilink information element types and information of one or more links; the address information in the direct connection link establishment request message comprises a first target address, and if the first target address is set as the address of the second terminal device by the first terminal device, the access device is indicated to send the direct connection link establishment request message to the second terminal device on any link connected with the second terminal device;

the first terminal equipment receives a direct connection link establishment response message sent by the access equipment, wherein the direct connection link establishment response message comprises address information and a multilink information element.

In a third aspect, an embodiment of the present invention provides a method for establishing a direct link, including:

the method comprises the steps that a second terminal device receives a direct link establishment request message sent by an access device, wherein the direct link establishment request message comprises address information and a multilink information element, and the multilink information element comprises multilink information element types and information of one or more links;

the second terminal device determines whether to approve the establishment of direct connection according to link information contained in a multilink information element in the direct connection link establishment request message, if yes, a direct connection link establishment response message is sent to the access device, the direct connection link establishment response message contains address information and the multilink information element, link information contained in the multilink information element in the direct connection link establishment response message comprises link information for confirming the direct connection, the address information in the direct connection link establishment response message comprises a second target address, and if the second terminal device sets the second target address as the address of the first terminal device, the access device is indicated to be capable of sending a link establishment response message to the first terminal device on any one link connected with the first terminal device.

In a fourth aspect, an embodiment of the present invention provides an apparatus for establishing a direct link, where the apparatus includes:

the communication module I is used for receiving a request message for establishing a direct link sent by a first terminal device, wherein the request message for establishing the direct link comprises address information and a multilink information element, the multilink information element comprises multilink information element types and information of one or more links, the address information in the request message for establishing the direct link sent by the first terminal device comprises a first target address, and if the first target address contained in the received request message for establishing the direct link is the address of a second terminal device, the request message for establishing the direct link is sent to the second terminal device on any one link connected with the second terminal device;

and the second communication module is configured to receive a direct link establishment response message sent by the second terminal device, where the direct link establishment response message includes address information and a multilink information element, the address information in the direct link establishment response message sent by the second terminal device includes a second target address, and if the second target address included in the received direct link establishment response message is an address of the first terminal device, send the direct link establishment response message to the first terminal device on any link connected with the first terminal device.

In a fifth aspect, an embodiment of the present invention provides an apparatus for establishing a direct link, where the apparatus includes:

the first communication module is used for sending a direct link establishment request message to the access device through the first terminal device, wherein the direct link establishment request message comprises address information and a multilink information element, and the multilink information element comprises a multilink information element type and information of one or more links; the address information in the direct connection link establishment request message comprises a first target address, and if the first target address is set as the address of the second terminal device by the first terminal device, the access device is indicated to send the direct connection link establishment request message to the second terminal device on any link connected with the second terminal device;

and the communication module II is used for receiving a direct link establishment response message sent by the access device through the first terminal device, wherein the direct link establishment response message comprises address information and a multilink information element.

In a sixth aspect, an embodiment of the present invention provides an apparatus for establishing a direct link, where the apparatus includes:

the first communication module is used for receiving a direct link establishment request message sent by access equipment through second terminal equipment, wherein the direct link establishment request message comprises address information and a multilink information element, and the multilink information element comprises a multilink information element type and information of one or more links;

and the second communication module is used for determining whether the establishment of direct connection is agreed according to the information of the link contained in the multilink information element in the direct link establishment request message through the second terminal device, if so, sending a direct link establishment response message to the access device, wherein the direct link establishment response message contains address information and multilink information elements, the information of the link contained in the multilink information element in the direct link establishment response message comprises link information for confirming direct connection, the address information in the direct link establishment response message comprises a second target address, and if the second terminal device sets the second target address as the address of the first terminal device, the second terminal device indicates the access device to send the direct link establishment response message to the first terminal device on any link connected with the first terminal device.

In a seventh aspect, an embodiment of the present invention provides a system for establishing a direct link, where the system includes an access device, a first terminal device, and a second terminal device, where the access device is configured to execute the method for establishing a direct link according to the first aspect, and the first terminal device is configured to execute the method for establishing a direct link according to the second aspect; the second terminal device is configured to execute the method for establishing a direct link according to the third aspect.

In an eighth aspect, an embodiment of the present invention provides an apparatus for establishing a direct link, where the apparatus includes a processor and a memory, where the memory stores instructions executable by the processor, and the instructions are loaded and executed by the processor to implement the method for establishing a direct link according to any one of the first to third aspects.

In a ninth aspect, an embodiment of the present invention provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the computer program implements the method for establishing a direct link according to any one of the first to third aspects.

In a tenth aspect, an embodiment of the present invention provides a computer program product, which includes instructions that, when executed by at least one processor, cause the at least one processor to perform the method for establishing a direct link according to any one of the first to third aspects.

It should be noted that the apparatus according to the fourth aspect is configured to perform the method provided by the first aspect, the apparatus according to the fifth aspect is configured to perform the method provided by the second aspect, the apparatus according to the sixth aspect is configured to perform the method provided by the third aspect, the device according to the eighth aspect, the storage medium according to the ninth aspect, and the program product according to the tenth aspect are configured to perform the method provided by any one of the first to third aspects, so that the same beneficial effects as those of the method according to the first aspect, the second aspect, or the third aspect can be achieved, and the embodiments of the present invention are not described in detail again.

Through the unified discovery and establishment process, the invention enables a plurality of logic entities of the terminal equipment to coordinate whether to establish the direct link, how many direct links are established, and the direct links between the terminal equipment are dynamically configured, thereby effectively improving the use efficiency of wireless resources, further improving the data transmission rate and reducing the transmission delay.

Drawings

The present application will now be described by way of example only with reference to the accompanying drawings, in which:

fig. 1 is a schematic diagram of a method for establishing a direct connection link according to an embodiment of the present invention;

fig. 2 is a schematic diagram of another method for establishing a direct connection link according to an embodiment of the present invention.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Moreover, while the present disclosure has been described in terms of one or more exemplary embodiments, it is to be understood that each aspect of the disclosure can independently be provided as a complete solution. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

In embodiments of the present invention, words such as "exemplary," "for example," and "such as" are used herein to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the word using examples is intended to present concepts in a concrete fashion.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The terms "first," "second," and the like, as used herein do not denote any order, quantity, or importance, but rather are used merely to distinguish one element from another, and the meanings of the corresponding terms may be the same or different. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The term "and/or" is meant to encompass any and all possible combinations of one or more of the associated listed items. The character "/" generally indicates that the preceding and following associated objects are in an "or" relationship.

It should be noted that the device with multilink capability includes multiple logic entities, each logic entity performs data transmission through one link, each logic entity includes an independent data transceiver module, and the device without multilink capability has only one logic entity. A device without multilink capability has only one MAC address, whereas a device with multilink capability has one MAC address, and each logical entity belonging to the device has one MAC address, e.g., a device runs with three logical entities, and there are four MAC addresses on the physical device, one is device, and each of the three logical entities has one MAC address. In the embodiment of the invention, a logic terminal is a logic entity in terminal equipment, and a logic access point is a logic entity in access equipment.

Fig. 1 is a schematic diagram of a method for establishing a direct connection link according to an embodiment of the present invention. As shown in fig. 1, the method for establishing a direct link includes the following steps:

s101, a first terminal device sends a direct connection link establishment request message (such as a TDLS setup request message) to an access device. The direct connection link establishment request message can contain address information and multilink information elements, and the multilink information elements comprise multilink information element types and information of one or more links; the address information in the direct connection link establishment request message includes a first target address.

Specifically, the first terminal device may set the first target address as an address of the terminal device, and may also set as an address of a logical terminal in the terminal device. Illustratively, if the first terminal device sets the first target address as an address of the second terminal device, the access device may be instructed to send a direct link establishment request message to the second terminal device on any one link connected to the second terminal device; and if the first terminal equipment sets the first target address as the address of the logic terminal, indicating the access equipment to send a direct link establishment request message to the second terminal equipment on the link corresponding to the logic terminal indicated by the first target address.

In some embodiments, when the multilink information element includes a multilink information element type that is a direct link discovery or a direct link establishment, information of a link in the multilink information element includes a link identifier, data capability information incapable of independent simultaneous transceiving, a direct connection initiator address and a direct connection responder address, or includes a link identifier, data capability information incapable of independent simultaneous transceiving, a direct connection initiator address, a direct connection responder address and a basic service set identifier, wherein the direct connection initiator address in the information of the link is set to an address of a logical terminal operating on a link corresponding to the link identifier in the information of the link in the direct connection initiator device, and the direct connection responder address in the information of the link is set to an address of a logical terminal operating on a link corresponding to the link in the information link identifier of the direct connection responder device.

Optionally, the address information in the direct link establishment request message may further include a source address, where the source address may be set as an address of the first terminal device, and may also be set as an address of a logical terminal in the first terminal device.

And S102, after receiving the direct link establishment request message sent by the first terminal device, the access device sends the direct link establishment request message (such as a TDLS setup request message) to the second terminal device.

Specifically, if a first target address contained in the received direct connection link establishment request message is an address of the second terminal device, sending the direct connection link establishment request message to the second terminal device on any link connected with the second terminal device; and if the first target address contained in the received direct connection link establishment request message is the address of the logic terminal, sending the direct connection link establishment request message to the second terminal equipment on the link corresponding to the logic terminal indicated by the first target address.

The address information in the direct link establishment request message sent by the access device to the second terminal device may include a source address, and the address of the first terminal device or the address of the logical terminal in the first terminal device is set in the embodiment of the present invention. Optionally, the address information in the direct link establishment request message sent by the access device to the second terminal device may further include a target address, and the address of the second terminal device or the address of the logical terminal in the second terminal device is set in the embodiment of the present invention.

And S103, after receiving a direct link establishment request message sent by the access device, the second terminal device determines whether to approve establishment of direct connection according to link information contained in a multilink information element in the direct link establishment request message, and if yes, sends a direct link establishment response message (such as a TDLS setup response message) to the access device. The direct link establishment response message may also include address information and a multilink information element, the address information in the direct link establishment response message includes a second target address, and the information of the link included in the multilink information element in the direct link establishment response message includes link information for confirming direct connection.

Specifically, the second terminal device may set the second target address as an address of the terminal device, and may also set as an address of a logical terminal in the terminal device. Exemplarily, if the second terminal device sets the second target address as the address of the first terminal device, the access device may be instructed to send a direct link establishment response message to the first terminal device on any link connected to the first terminal device; and if the second terminal equipment sets the second target address as the address of the logic terminal, indicating the access equipment to send a direct link establishment response message to the first terminal equipment on the link corresponding to the logic terminal indicated by the second target address.

Optionally, the address information in the direct link establishment response message may further include a source address, where the source address may be set to an address of the second terminal device, and may also be set to an address of a logical terminal in the second terminal device.

And S104, after receiving the direct link establishment response message sent by the second terminal device, the access device sends the direct link establishment response message (such as a TDLS setup response message) to the first terminal device.

Specifically, if a second target address contained in the received direct connection link establishment response message is the address of the first terminal device, sending the direct connection link establishment response message to the first terminal device on any link connected with the first terminal device; and if the second target address contained in the received direct connection link establishment response message is the address of the logic terminal, sending the direct connection link establishment response message to the first terminal equipment on the link corresponding to the logic terminal indicated by the second target address.

The address information in the direct link establishment response message sent by the access device to the first terminal device may include a source address, and the address of the second terminal device or the address of the logical terminal in the second terminal device is set in the embodiment of the present invention. Optionally, the address information in the direct link establishment response message sent by the access device to the first terminal device may further include a target address, and the address of the first terminal device or the address of the logical terminal in the first terminal device is set in the embodiment of the present invention.

And S105, after receiving the direct link establishment response message sent by the access device, the first terminal device sends a direct link establishment confirmation message (such as a TDLS setup confirm message) to the access device if the second terminal device receives the establishment request. The direct connection link establishment confirmation message comprises address information and a multilink information element, and the address information in the direct connection link establishment confirmation message comprises a third target address.

Specifically, the first terminal device may set the third target address as an address of the terminal device, and may also set as an address of a logical terminal in the terminal device. For example, if the first terminal device sets the third destination address as the address of the second terminal device, the access device may be instructed to send a direct link establishment confirmation message to the second terminal device on any link connected to the second terminal device; and if the first terminal equipment sets the third target address as the address of the logic terminal, indicating the access equipment to send a direct connection link establishment confirmation message to the second terminal equipment on the link corresponding to the logic terminal indicated by the third target address.

Optionally, the address information in the direct link establishment confirmation message may further include a source address, where the source address may be set as an address of the first terminal device, and may also be set as an address of a logic terminal in the first terminal device, which is not limited in this embodiment of the present invention.

And S106, after receiving the direct link establishment confirmation message sent by the first terminal device, the access device sends the direct link establishment confirmation message (such as a TDLS setup confirm message) to the second terminal device.

Specifically, if a third target address included in the received direct link establishment confirmation message is an address of the second terminal device, the direct link establishment confirmation message is sent to the second terminal device on any link connected with the second terminal device; and if the third target address contained in the received direct connection link establishment confirmation message is the address of the logic terminal, sending the direct connection link establishment confirmation message to the second terminal equipment on the link corresponding to the logic terminal indicated by the third target address.

The address information in the direct link establishment confirmation message sent by the access device to the second terminal device may include a source address, and the address of the first terminal device or the address of the logical terminal in the first terminal device is set in the embodiment of the present invention. Optionally, the address information in the direct link establishment confirmation message sent by the access device to the second terminal device may further include a target address, and the address of the second terminal device or the address of the logical terminal in the second terminal device is set in the embodiment of the present invention.

And the first terminal equipment and the second terminal equipment establish the direct connection link according to the information of the link contained in the multilink information element in the direct connection link confirmation message. The first terminal device and the second terminal device can directly send and receive data on the established direct connection link. For example, the directly sending and receiving data on the established direct link by the first terminal device and the second terminal device includes:

if the established direct connection link comprises a link pair which can not independently receive and transmit data at the same time, when the first terminal equipment or the second terminal equipment sends data on one link of the link pair which can not independently receive and transmit data at the same time, the other link can not receive data; or when receiving data on one link of the link pair which can not independently receive and transmit data simultaneously, the other link can not transmit data.

In some embodiments, a direct link discovery procedure is also included prior to the direct link establishment procedure. As shown in fig. 2, the method for establishing a direct link includes the following steps:

s201, a first terminal device sends a direct connection link discovery request message (such as a TDLS discovery request message) to an access device, wherein the direct connection link discovery request message comprises address information and a multilink information element, and the address information in the direct connection link discovery request message comprises a fourth target address.

Specifically, the first terminal device may set the fourth target address as an address of the terminal device, and may also set as an address of a logical terminal in the terminal device. Exemplarily, if the first terminal device sets the fourth destination address as the address of the second terminal device, the access device may be instructed to send a direct link discovery request message to the second terminal device on any link connected to the second terminal device; and if the first terminal equipment sets the fourth target address as the address of the logic terminal, indicating the access equipment to send a direct link discovery request message to the second terminal equipment on a link corresponding to the logic terminal indicated by the fourth target address.

Optionally, the address information in the direct link discovery request message may further include a source address, where the source address may be set as an address of the first terminal device, and may also be set as an address of a logical terminal in the first terminal device.

S202, after receiving a direct link discovery request message sent by a first terminal device, an access device sends the direct link discovery request message to a second terminal device on any one link connected with the second terminal device if a fourth target address contained in the received direct link discovery request message is the address of the second terminal device; and if the fourth target address contained in the received direct connection link establishment confirmation message is the address of the logic terminal, sending a direct connection link discovery request message to the second terminal device on the link corresponding to the logic terminal indicated by the fourth target address.

The address information in the direct link discovery request message sent by the access device to the second terminal device may include a source address, and the address of the first terminal device or the address of the logical terminal in the first terminal device is set in the embodiment of the present invention. Optionally, the address information in the direct connection link discovery request message sent by the access device to the second terminal device may further include a target address, and the address of the second terminal device or the address of the logical terminal in the second terminal device is set in the embodiment of the present invention.

And S203, after receiving the direct link discovery request message sent by the access device, the second terminal device sends a direct link discovery response message (such as a TDLS discovery response message) to the first terminal device, wherein the direct link discovery response message comprises address information and a multilink information element.

And S204, the first terminal equipment sends a direct connection link establishment request message (such as a TDLS setup request message) to the access equipment.

And S205, after receiving the direct connection link establishment request message sent by the first terminal device, the access device sends the direct connection link establishment request message (such as a TDLS setup request message) to the second terminal device.

And S206, after receiving the direct link establishment request message sent by the access device, the second terminal device determines whether to approve establishment of direct connection according to the link information contained in the multilink information element in the direct link establishment request message, and if yes, sends a direct link establishment response message (such as a TDLS setup response message) to the access device.

And S207, after receiving the direct link establishment response message sent by the second terminal device, the access device sends a direct link establishment response message (such as a TDLS setup response message) to the first terminal device.

And S208, after receiving the direct link establishment response message sent by the access device, the first terminal device sends a direct link establishment confirmation message (such as a TDLS setup confirm message) to the access device if the second terminal device receives the establishment request.

S209, after receiving the direct link establishment confirmation message sent by the first terminal device, the access device sends a direct link establishment confirmation message (e.g., a TDLS setup confirm message) to the second terminal device.

Steps S204-S209 can refer to steps S101-S106 in the embodiment shown in FIG. 1, and are not described herein again. After step S209, the first terminal device and the second terminal device establish the direct link according to the link information included in the multilink information element in the direct link establishment confirmation message. The first terminal device and the second terminal device can directly send and receive data on the established direct connection link. The first terminal device or the second terminal device may also request to cancel one or more of the direct links through the link reconfiguration request, or request to add one or more of the direct links. Assuming that a first terminal device is a requester of link reconfiguration, the first terminal device sends a multilink reconfiguration request message (such as an ML reconfiguration request message) to a second terminal device, where the multilink reconfiguration request message includes a request type and a multilink information element, the multilink information element type in the multilink information element included in the multilink reconfiguration request message is set as multilink reconfiguration, and when the multilink information element type is set as multilink reconfiguration, information of links in the multilink information element indicates whether to delete a link and an identifier of a deleted or added link.

In some embodiments, the information of the link in the multilink information element contained in the multilink reconfiguration request message includes a link identifier and an identifier of a newly added link, and a first parameter for indicating whether to delete the link and a second parameter for indicating a link deletion time. If the request is to cancel the link, setting the link identifier in the multilink reconfiguration request message as the identifier of the link to be deleted, setting the identifier of the newly added link as null or a first preset value, setting a first parameter as indicating to delete the link, and setting a second parameter as the link residual time to be deleted; if the request is to add the link, the link identification in the multilink reconfiguration request message is set to be empty or a second preset value, the identification of the newly added link is set to be the identification of the newly added link, the first parameter is set to indicate that the link is not deleted, and the second parameter is set to be empty. Illustratively, the first preset value may be a maximum value that can be represented by the bit number of the link identifier, and the second preset value may be a maximum value that can be represented by the bit number of the identifier of the newly added link.

For a better understanding of the present invention, the present invention is further described below in conjunction with a specific application scenario. In the specific application, the terminal device Non-AP MLD1 comprises three logic terminals STA1, STA2 and STA3, the Non-AP MLD1, STA2 and STA3 are respectively allocated with different MAC addresses, the terminal device Non-AP MLD2 comprises three logic terminals STA4, STA5 and STA6, the Non-AP MLD2, STA4, STA5 and STA6 are respectively allocated with different MAC addresses, the access device AP MLD1 comprises three logic access points AP1, AP2 and AP3, and the AP MLD1, AP2 and AP3 are respectively allocated with different MAC addresses; STA1 and STA4 are connected to AP1, STA2 and STA5 are connected to AP2, and STA3 and STA6 are connected to AP3; AP1 operates on the Link identified as Link1, AP2 operates on the Link identified as Link2, and AP3 operates on the Link identified as Link 3. The following description will take an example in which the terminal device Non-AP MLD1 is an initiator of the establishment of the direct link, and the terminal device Non-AP MLD2 is a responder of the establishment of the direct link.

S1001, the Non-AP MLD1 sends a TDLS discovery request message to the Non-AP MLD2 through the AP MLD1. In particular, the amount of the solvent to be used,

1.1 any one of the logical terminals STA1 (or STA2 or STA 3) of the Non-AP MLD1 sends a TDLS discovery request message to the AP1 (or AP2 or AP 3), where the TDLS discovery request message is set as shown in table 1.

TABLE 1

Parameter(s)	Description of the invention
		Address	Address information
Link Identifier	Direct link information
		Multi Link Element	Multilink information element

The Address parameter setting is shown in table 2 or table 3, for example.

TABLE 2

TABLE 3

The Link Identifier parameter settings are shown in table 4, for example.

TABLE 4

The Multi Link Element parameter setting is shown in table 5, for example.

TABLE 5

When the Type value is "TDLS discovery/setup", wherein the Link info setting represents, for example, table 6 or Table 7.

TABLE 6

Parameter(s)	Description of the invention
		Link ID	Link identification
NSTR info	Inability to independently and simultaneously transmit and receive data capability information
		TDLS initiator STA Address	Direct connection initiator address
TDLS responder STA Address	Direct connect responder addresses

TABLE 7

Specific settings for the parameter Link info are shown in table 8, for example.

TABLE 8

In table 8, (Link 2, link 3) is a Link pair that cannot independently transmit and receive data simultaneously.

After the TDLS discovery request message is received by the 2ap MLD1, because the DA parameter value is the Address of the terminal device Non-AP MLD2, the TDLS discovery request message may be sent to the logical terminal of the Non-AP MLD2 corresponding to the link on any link where the AP MLD1 and the Non-AP MLD2 are connected, where the Address setting in the TDLS discovery request message sent to the Non-AP MLD2 is shown in table 9 or table 10, and other parameters remain unchanged.

TABLE 9

TABLE 10

S1002. After receiving the TDLS discovery request message, the Non-AP MLD2 determines that the other side requests to establish multilink direct connection according to the value set by the Link Identifier (all set as the address of the physical device), then determines whether to agree to establish direct connection on the links according to the Link info in the Multi Link Element, if yes, the Link information is included in the TDLS discovery response message, after the confirmation is finished, the Non-AP MLD2 can send the TDLS discovery response message to the Non-AP MLD1 on any Link which agrees to establish the direct connection, wherein the TDLS discovery response message is set as shown in a table 11.

TABLE 11

The Address parameter setting is shown in table 12, for example.

TABLE 12

Wherein, the Link Identifier parameter is the same as that in the TDLS discovery request message;

the difference between the Multi Link Element parameter and the TDLS discovery request message is as follows: the Link info also includes capabilities or/and operation parameters of the corresponding logical terminal on the Link, such as supported transmission rate, supported operation level, supported channel, etc.

It should be noted that the TDLS discovery procedure is not a necessary procedure, and one TDLS device may choose to directly initiate the TDLS setup procedure.

S1003. The Non-AP MLD1 sends a TDLS setup request message to the Non-AP MLD2 through the AP MLD1, the message is sent to the AP MLD1 through the Non-AP MLD1 in the same way as the TDLS discovery request message, the message is sent to the AP MLD1 through the Non-AP MLD1 at first, then the AP MLD1 sends the message to the Non-AP MLD2, the specific sending method is the same as 1.1-1.2 in the step S1001, and the TDLS setup request message is set in a table 13 for example.

Watch 13

Parameter(s)	Description of the preferred embodiment
		Address	Address information
Link Identifier	Direct link information
		Multi Link Element	Multilink information element

Wherein, when the TDLS setup request message is sent by the Non-AP MLD1 to the AP MLD1, the Address parameter setting is represented by, for example, table 14 or table 15.

TABLE 14

Watch 15

After the AP MLD1 receives the TDLS setup request message, because the DA is the Address of the terminal device, the AP MLD1 may send the TDLS setup request message to the logical terminal of the Non-AP MLD2 corresponding to the link on any link where the AP MLD1 is connected to the Non-AP MLD2, where the Address parameter setting is, for example, table 16 or table 17.

TABLE 16

TABLE 17

Wherein, the Link Identifier parameter and the Multi Link Element are set to be the same as the TDLS discovery response message, and the list is not repeated here.

S1004. After receiving the TDLS setup request message, the Non-AP MLD2 determines that the other side requests to establish the multilink direct connection according to the value set by the Link Identifier (the values are all set as the addresses of multilink equipment), then determines whether to agree to establish the direct connection on the links according to the Link info in the Multi Link Element, if yes, the Link information is included in the TDLS setup response message, after the confirmation is finished, the Non-AP MLD2 can send the TDLS setup response message to the Non-AP MLD1 through the MLAP 1 on any Link which agrees to establish the direct connection, wherein the TDLS setup response message is set as shown in a table 18.

Watch 18

Wherein, when the TDLS setup response message is sent by the Non-AP MLD2 to the AP MLD1, the Address parameter setting is, for example, table 19 or table 20.

Watch 19

Watch 20

After the AP MLD1 receives the TDLS setup response message, because the DA is the Address of the terminal device, the AP MLD1 may send the TDLS setup response message to the logical terminal of the Non-AP MLD1 corresponding to the link on any link where the AP MLD1 and the Non-AP MLD1 are connected, where the Address setting parameter is, for example, table 21 or table 22.

TABLE 21

TABLE 22

S1005. After receiving the TDLS setup response message, the Non-AP MLD1 sends a TDLS setup confirm message to the Non-AP MLD2 through the AP MLD1 on the link confirmed to be directly connected according to the link information confirmed to be directly connected in the message, wherein the sending mode and the setting of the address parameter of the TDLS setup confirm message are the same as those of the TDLS setup request message, and the key point is that when the TDLS setup confirm message is sent to the AP MLD1, the DA is set as the address of the peer terminal device, so that the MLD1 can forward the message on any link connected with the peer terminal.

And S1006, after receiving the TDLS setup confirm message, the Non-AP MLD2 starts to directly transmit and receive data with the Non-AP MLD1 on the confirmed link, wherein the data are not transmitted and received through the AP MLD1. In some embodiments, the Non-AP MLD2 and Non-AP MLD1 directly transmitting and receiving data on the acknowledged link comprises:

if the confirmed link information contains NSTR info, data is limitedly transmitted and received on the links according to the parameter indication, that is, when data is transmitted on one link, the other link does not receive data, or when data is received on one link, the other link does not transmit data.

S1007, when a plurality of links are currently established on the Non-AP MLD1 and the Mon-AP MLD2, the Non-AP MLD1 or the Non-AP MLD2 can cancel one or more of the direct links through the direct link reconfiguration request, or can confirm that a direct link can be established according to the capabilities and operation links of both parties, the one or more direct links are added through the direct link reconfiguration request, wherein the direct link reconfiguration request and the response message do not pass through the AP MLD1, are directly transmitted on the existing direct links of the Non-AP MLD1 and the Mon-AP MLD2, and take the Non-AP MLD1 as an initiator of canceling or adding links as an example, and the specific process comprises the following steps:

7.1Non-AP MLD1 sends ML reconfiguration request message to Non-AP MLD2, and sends the message to a peer-to-peer logical terminal (STA 4) which is subordinate to Non-AP MLD2 through a logical terminal (assumed as STA 1) which is subordinate to Non-AP MLD1, wherein the logical terminal sending the message can not be a logical terminal which requests to cancel the direct Link, for example, if the Link2 Link is requested to be canceled as the direct Link, the message can be sent through STA1, if the Link1 Link is requested to be canceled as the direct Link, the message can not be sent through STA1, the peer-to-peer logical terminal refers to a logical terminal which carries out data transceiving on the same Link, and STA1 and STA4 carry out data transceiving on Link1, and then the peer-to-peer logical terminals are mutually. Here, the ML reconfiguration request message setting is shown as table 23.

TABLE 23

Wherein the Multi Link Element setting representation is, for example, table 24.

Watch 24

When the Type value is ML reconfiguration, the Link info setting table shows, for example, table 25.

TABLE 25

After Non-AP MLD2 receives the ML reconfiguration request message, if the parameter value is set as in the above table 25, the direct connection with Non-AP MLD1 on the Link indicated by the Link ID is disconnected within the Delete time.

7.2Non-AP MLD1 sends ML repetition request message to Non-AP MLD2, where ML repetition request message sets table 26, for example.

Watch 26

Wherein the Multi Link Element setting representation is, for example, table 27.

Watch 27

When the Type value is ML reconfiguration, the Link info setting table shows, for example, table 28.

Watch 28

Parameter(s)	Description of the preferred embodiment	Setup for newly added links
			Link ID	Link identification	Is arranged at 15
Delete imminent	Indicating whether to delete a link	Set to 0, indicating a newly added link
			Delete timer	Indicating link deletion remaining time	Is set to be empty
New Link ID	Identification indicating new link	Set as the newly added link identification

After the Non-AP MLD2 receives the ML reconfiguration request message, if the direct link is agreed to be newly added, the ML reconfiguration response message is sent to the Non-AP MLD1, and the message indicates that the establishment of the new direct link is agreed.

In some embodiments, the Link Identifier parameter may not be included in steps S1001-S1006; after receiving the TDLS discovery request or the TDLS setup request, the Non-AP MLD2 directly determines whether the multilink direct connection request is included according to whether the multilink Element is included, without determining whether the multilink direct connection request is included according to a Link Identifier.

In the embodiment of the present invention, based on the same inventive concept as the above method for establishing a direct link, an embodiment of the present invention further provides a device for establishing a direct link, where the device includes:

In the embodiment of the present invention, based on the same inventive concept as the above method for establishing a direct connection link, another apparatus for establishing a direct connection link is further provided in the embodiment of the present invention, where the apparatus includes:

In the embodiment of the present invention, based on the same inventive concept as the above method for establishing a direct link, another apparatus for establishing a direct link is further provided in the embodiment of the present invention, where the apparatus includes:

In the embodiment of the present invention, based on the same inventive concept as the above method for establishing a direct link, an embodiment of the present invention further provides an apparatus for establishing a direct link, where the apparatus includes a processor and a memory, where the memory stores instructions executable by the processor, and the instructions are loaded and executed by the processor, so as to implement the method for establishing a direct link according to the above embodiment.

In addition, an embodiment of the present invention further provides a computer-readable storage medium, in which a computer program is stored, and when the computer program is executed by a processor, the method for establishing a direct link according to the foregoing embodiment is implemented.

It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, some or all of the steps may be executed in parallel or executed sequentially, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of modules or components may be combined or integrated into another system, or some features may be omitted, or not executed.

The modules described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, functional modules in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more modules are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention or a part thereof, which essentially contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, a network device or a terminal, etc.) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: u disk, removable hard disk, ROM, RAM) magnetic or optical disk, or the like.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A method of establishing a direct link, comprising:

receiving a response message of establishing a direct link sent by second terminal equipment, wherein the response message of establishing the direct link comprises address information and multilink information elements, the address information in the response message of establishing the direct link sent by the second terminal equipment comprises a second target address, and if the second target address contained in the response message of establishing the direct link is the address of the first terminal equipment, sending the response message of establishing the direct link to the first terminal equipment on any link connected with the first terminal equipment.

2. The method of claim 1, further comprising:

if the first target address contained in the received direct connection link establishment request message is the address of the logic terminal, sending the direct connection link establishment request message to the second terminal equipment on the link corresponding to the logic terminal indicated by the first target address;

and if the second target address contained in the received direct connection link establishment response message is the address of the logic terminal, sending the direct connection link establishment response message to the first terminal equipment on the link corresponding to the logic terminal indicated by the second target address.

3. The method according to claim 1, further comprising, after sending a direct link setup response message to the first terminal device:

receiving a direct link establishment confirmation message sent by a first terminal device, wherein the direct link establishment confirmation message comprises address information and a multilink information element, the address information in the direct link establishment confirmation message sent by the first terminal device comprises a third target address, and if the third target address contained in the received direct link establishment confirmation message is the address of a second terminal device, sending the direct link establishment confirmation message to the second terminal device on any link connected with the second terminal device.

4. The method of claim 3, further comprising:

and if the third target address contained in the received direct connection link establishment confirmation message is the address of the logic terminal, sending the direct connection link establishment confirmation message to the second terminal equipment on the link corresponding to the logic terminal indicated by the third target address.

5. The method of claim 1, wherein before receiving a direct link establishment request message sent by a first terminal device, the method further comprises:

the method comprises the steps of receiving a direct link discovery request message sent by first terminal equipment, wherein the direct link discovery request message comprises address information and a multilink information element, the address information in the direct link establishment discovery request message sent by the first terminal equipment comprises a fourth target address, and if the fourth target address contained in the received direct link discovery request message is the address of second terminal equipment, sending the direct link discovery request message to the second terminal equipment on any link connected with the second terminal equipment.

6. The method of claim 5, further comprising:

and if the fourth target address contained in the received direct connection link discovery request message is the address of the logic terminal, sending the direct connection link discovery request message to the second terminal device on the link corresponding to the logic terminal indicated by the fourth target address.

7. The method for establishing the direct link according to any one of claims 1 to 6, wherein address information in at least one of a direct link establishment request message sent by a first terminal device, a direct link establishment response message sent to the first terminal device, a direct link establishment confirmation message sent by the first terminal device, a direct link establishment discovery request message sent by the first terminal device, a direct link establishment request message sent to a second terminal device, a direct link establishment confirmation message sent to the second terminal device, and a direct link discovery request message sent to the second terminal device includes an address of the first terminal device or an address of a logical terminal in the first terminal device;

the address information in at least one of the direct link establishment request message sent to the second terminal device, the direct link establishment response message sent by the second terminal device, the direct link establishment confirmation message sent to the second terminal device, the direct link discovery request message sent to the second terminal device, and the direct link establishment response message sent to the first terminal device includes an address of the second terminal device or an address of a logical terminal in the second terminal device.

8. A method of establishing a direct link, comprising:

a first terminal device sends a direct connection link establishment request message to an access device, wherein the direct connection link establishment request message comprises address information and a multilink information element, and the multilink information element comprises multilink information element types and information of one or more links; the address information in the direct connection link establishment request message comprises a first target address, and if the first target address is set as the address of the second terminal device by the first terminal device, the access device is indicated to send the direct connection link establishment request message to the second terminal device on any link connected with the second terminal device;

the first terminal equipment receives a direct link establishment response message sent by the access equipment, wherein the direct link establishment response message comprises address information and a multilink information element.

9. The method according to claim 8, wherein if the first terminal device sets the first target address as the address of the logical terminal, the access device is instructed to send the direct link establishment request message to the second terminal device on the link corresponding to the logical terminal indicated by the first target address.

10. The method of claim 8, further comprising, after receiving the direct link setup response message:

the method comprises the steps that a first terminal device sends a direct connection link establishment confirmation message to an access device, the direct connection link establishment confirmation message comprises address information and a multilink information element, the address information in the direct connection link establishment confirmation message comprises a third target address, and if the third target address is set to be the address of a second terminal device by the first terminal device, the access device is indicated to be capable of sending the direct connection link establishment confirmation message to the second terminal device on any link connected with the second terminal device.

11. The method according to claim 10, wherein if the first terminal device sets the third destination address as the address of the logical terminal, the access device is instructed to send a direct link establishment confirmation message to the second terminal device on the link corresponding to the logical terminal indicated by the third destination address.

12. The method of claim 10, further comprising, after sending the direct link setup confirm message:

and the first terminal equipment establishes the direct link with the second terminal equipment according to the link information contained in the multilink information element in the direct link establishment confirmation message.

13. The method of claim 8, further comprising, before sending the direct link setup request message:

the method comprises the steps that a first terminal device sends a direct connection link discovery request message to an access device, wherein the direct connection link discovery request message comprises address information and a multilink information element, the address information in the direct connection link discovery request message comprises a fourth target address, and if the fourth target address is set as an address of a second terminal device by the first terminal device, the access device is indicated to send the direct connection link discovery request message to the second terminal device on any link connected with the second terminal device;

the method comprises the steps that a first terminal device receives a direct connection link discovery response message sent by a second terminal device, the direct connection link discovery response message comprises address information and a multilink information element, and the address information in the direct connection link discovery response message comprises a receiving address and a sending address.

14. The method according to claim 13, wherein if the first terminal device sets the fourth target address as the address of the logical terminal, the access device is instructed to send a direct link discovery request message to the second terminal device on the link corresponding to the logical terminal indicated by the fourth target address.

15. The method of claim 10, further comprising, after sending the direct link setup confirm message:

the method comprises the steps that a first terminal device sends a multilink reconfiguration request message to a second terminal device, or receives the multilink reconfiguration request message sent by the second terminal device, the multilink reconfiguration request message comprises a request type and multilink information elements, the multilink information element type in the multilink information elements contained in the multilink reconfiguration request message is set to be multilink reconfiguration, and when the multilink information element type is set to be multilink reconfiguration, the information of links in the multilink information elements indicates whether links are deleted or not and the identification of links which are deleted or added is indicated.

16. The method according to any of claims 8 to 15, wherein the address information in at least one of the direct link establishment request message, the direct link establishment response message, the direct link establishment confirmation message, and the direct link discovery request message comprises an address of the first terminal device or an address of a logical terminal in the first terminal device; the address information in the direct connection link establishment response message includes the address of the second terminal device or the logical terminal in the second terminal device.

17. A method of establishing a direct link, comprising:

18. The method according to claim 17, wherein if the second terminal device sets the second target address as the address of the logical terminal, the access device is instructed to send the direct link discovery request message to the first terminal device on the link corresponding to the logical terminal indicated by the second target address.

19. The method of claim 17, further comprising, after sending the direct link setup response message:

and the second terminal equipment receives a direct link establishment confirmation message sent by the access equipment, wherein the direct link establishment confirmation message comprises address information and a multilink information element.

20. The method of claim 19, further comprising, after receiving a direct link setup confirm message:

and the second terminal equipment establishes the direct link with the first terminal equipment according to the link information contained in the multilink information element in the direct link establishment confirmation message.

21. The method of claim 17, further comprising, before receiving the direct link setup request message:

the second terminal equipment receives a direct link discovery request message sent by the access equipment, wherein the direct link discovery request message comprises address information and a multilink information element;

and the second terminal equipment sends a direct connection link discovery response message to the first terminal equipment, wherein the direct connection link discovery response message comprises address information and a multilink information element.

22. The method of claim 19, further comprising, after receiving a direct link establishment confirmation message:

the second terminal device receives a multilink reconfiguration request message sent by the first terminal device, or sends the multilink reconfiguration request message to the first terminal device, wherein the multilink reconfiguration request message comprises a request type and multilink information elements, the multilink information element type in the multilink information elements contained in the multilink reconfiguration request message is set as multilink reconfiguration, and when the multilink information element type is set as multilink reconfiguration, the information of the links in the multilink information elements indicates whether to delete the links and delete or add new links.

23. The method according to any of claims 17 to 22, wherein the address information in at least one of the direct link establishment request message, the direct link establishment response message, the direct link establishment confirmation message, and the direct link discovery request message comprises an address of the second terminal device or an address of a logical terminal in the second terminal device; the address information in the direct connection link establishment request message includes an address of the first terminal device or an address of a logical terminal in the first terminal device.

24. The method for establishing the direct link according to any one of claims 1 to 6 and 8 to 15 and 17 to 22, wherein when the multilink information element includes a multilink information element type of a direct link discovery or a direct link establishment, information of a link in the multilink information element includes a link identifier, a direct link initiator address and a direct link responder address, or includes a link identifier, a direct link initiator address, a direct link responder address and a basic service set identifier, wherein the direct link initiator address in the information of the link is set as an address of a logical terminal in a direct link initiator device operating on a link corresponding to the link identifier in the information of the link, and the direct link responder address in the information of the link is set as an address of a logical terminal in a direct link responder device operating on a link corresponding to the link identifier in the information of the link.

25. The method according to claim 12 or 20, further comprising a first terminal device and a second terminal device directly sending and receiving data on the established direct link, where the first terminal device and the second terminal device directly sending and receiving data on the established direct link includes:

if the established direct link comprises a link pair which can not independently receive and transmit data at the same time, when the first terminal equipment or the second terminal equipment sends data on one link of the link pair which can not independently receive and transmit data at the same time, the other link can not receive the data; or when receiving data on one link of the link pair which can not independently receive and transmit data simultaneously, the other link can not transmit data.

26. The method for establishing the direct link according to any one of claims 1 to 6 and 8 to 15 and 17 to 22, wherein at least one of a direct link establishment request message, a direct link establishment response message, a direct link establishment confirmation message, a direct link discovery request message and a direct link discovery response message includes direct link information, and the direct link information includes a basic service set identifier, a direct link initiator address and a direct link responder address; and if the address of the direct connection initiator and the address of the direct connection responder in the direct connection link information are respectively set as the address of the direct connection initiator device and the address of the direct connection responder device, indicating that the multilink is directly connected.

27. A method of establishing a direct link according to claim 15 or 22, wherein the logical terminal sending the multilink reconfiguration request message operates on the link outside the link indicated to be deleted in the multilink reconfiguration request message.

28. A system for establishing a direct link, the system comprising an access device, a first terminal device and a second terminal device, the access device being configured to perform the method for establishing a direct link according to any one of claims 1 to 7, the first terminal device being configured to perform the method for establishing a direct link according to any one of claims 8 to 16; the second terminal device is configured to perform the method for establishing a direct link according to any one of claims 17-23.

29. A device for establishing a direct link, the device comprising a processor and a memory, the memory storing instructions executable by the processor, the instructions being loaded and executed by the processor to implement the method for establishing a direct link according to any one of claims 1 to 27.

30. A computer-readable storage medium, storing a computer program, wherein the computer program, when executed by a processor, implements the method of establishing a direct link of any of claims 1-27.