CN115002861A

CN115002861A - Method, device, equipment and storage medium for switching multilink terminal equipment

Info

Publication number: CN115002861A
Application number: CN202110223641.3A
Authority: CN
Inventors: 吴昊; 王鑫
Original assignee: Chengdu Jimi Technology Co Ltd
Current assignee: Chengdu Jimi Technology Co Ltd
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2022-09-02
Anticipated expiration: 2041-03-01
Also published as: CN115002861B

Abstract

The invention discloses a method, a device, equipment and a storage medium for switching multilink terminal equipment. The method comprises the following steps: a first logic entity sends a link reconfiguration request signaling to a first logic access point of an access device, wherein the link reconfiguration request signaling comprises parameters of Action Type, Dialog token, Type, linkelement and Extension element; a first logic entity receives a link reconfiguration response signaling sent by a first logic access point; the first logic entity informs the high-level management entity that the access equipment receives the link reconfiguration request, and the high-level management entity indicates the second logic entity to execute switching preparation operation; and the second logic entity executes the connection operation with the target access point, and after the connection is successful, the first logic entity is disconnected with the first logic access point. The invention makes the terminal equipment search the proper access point to switch without breaking the original service, and makes the terminal keep the continuity of the service when the terminal roams among different access points.

Description

Method, device, equipment and storage medium for switching multilink terminal equipment

Technical Field

The present invention relates to the field of wireless communications, and in particular, to a method, an apparatus, a device, and a storage medium for switching a multi-link terminal device.

Background

In the 802.11 system, an access device (AP STA) and a terminal device (Non-AP STA) are both internally deployed with a MAC layer and a PHY layer, wherein the main functions of the MAC layer include channel management, connection management, quality of service management, power control, time synchronization, and the like, and the main functions of the PHY layer include modulation, coding, transmission, and the like.

Both the MAC layer and the PHY layer conceptually include management entities referred to as a MAC layer management unit mlme (MAC sublayer management entity) and a physical layer management unit plme (PHY sublayer management entity), respectively. These elements provide low-level management service interfaces through which low-level management functions can be invoked.

In order to provide correct MAC operation, each STA (including Non-AP STA and AP STA) has a higher management element, such as SME (device management element), which represents a higher management entity above the MAC layer, is a layer-independent entity, and is located in a separate management plane.

The function of SME: typically, this unit is responsible for functions such as collecting layer-related state from various layer management units (MLME and PLME), which similarly also set layer-specific parameter values. SMEs typically perform such functions on behalf of a general system management entity. The layers interact with each other through defined primitives.

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 is less than 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

When the wireless lan link is caused by, for example, a terminal device moving, a network overload, etc., it may be from the coverage of one AP (access point) to the coverage of another AP, which is called as handover. The characteristic of the multilink terminal equipment enables the terminal equipment to establish two or more links at the same time, so that the continuity of the service can be kept when the terminal equipment roams among different APs through the link management and interactive control mode of the invention.

In a first aspect, an embodiment of the present invention provides a method for switching a multi-link terminal device, where the method is applied to a multi-link terminal device, the multi-link terminal device includes a high-level management entity and at least two logic entities, where the at least two logic entities include a logic entity one and a logic entity two, and the method includes:

the method comprises the steps that a logic entity I sends a link reconfiguration request signaling to a logic access point I of an access device, wherein the link reconfiguration request signaling comprises parameters of an Action Type, a Dialog token, a Type, a link element and an Extension element, the Action Type is used for indicating the Type of a current process, the Dialog token is used for identifying the current process, the Type is used for indicating the Type of link reconfiguration and is set to be a link deletion mode, the link element is used for indicating link related parameters, and the Extension element is used for indicating other related parameters to be reconfigured;

a first logic entity receives a link reconfiguration response signaling sent by a first logic access point;

the first logic entity informs the high-level management entity that the access equipment receives the link reconfiguration request, and the high-level management entity indicates the second logic entity to execute switching preparation operation;

the logic entity II executes the connection operation with the target access point, after the connection is successful, the high-level management entity is informed of being connected with the target access point, and the high-level management entity indicates the logic entity I to execute the operation of disconnecting the connection with the logic access point I;

and the first logic entity performs disconnection operation with the first logic access point.

In a second aspect, an embodiment of the present application provides a method for switching a multi-link terminal device, where the method includes:

a first logic access point of the access device receives a link reconfiguration request signaling sent by a first logic entity of the multi-link terminal device, and executes operation according to parameters in the link reconfiguration request signaling, wherein the link reconfiguration request signaling comprises parameters of an Action Type, a Dialog token, a Type, a link element and an Extension element, the Action Type is used for indicating the Type of a current process, the Dialog token is used for identifying the current process, the Type is used for indicating the Type of link reconfiguration and is set to delete a link, the link element is used for indicating link related parameters, and the Extension element is used for indicating other related parameters of reconfiguration;

the logic access point sends a link reconfiguration response signal to a logic entity I;

and the first logic access point performs disconnection operation with the first logic entity.

In a third aspect, an embodiment of the present invention provides an apparatus for switching a multi-link terminal device, where the apparatus includes:

the first logic entity module is used for sending a link reconfiguration request signaling to a first logic access point of the access equipment through a logic entity, wherein the link reconfiguration request signaling comprises parameters of an Action Type, a Dialog token, a Type, a link element and an Extension element, the Action Type is used for indicating the Type of a current process, the Dialog token is used for identifying the current process, the Type is used for indicating the Type of link reconfiguration and is set to delete a link, the link element is used for indicating link related parameters, and the Extension element is used for indicating other related parameters to be reconfigured;

the first logic entity module is further configured to receive, by a first logic entity, a link reconfiguration response signaling sent by a first logic access point;

the first logic entity module is further configured to notify a high-level management entity through a first logic entity that the access device receives the link reconfiguration request;

the high-level management entity module is used for indicating the logic entity II to execute switching preparation operation through the high-level management entity;

the second logic entity module is used for executing the connection operation with the target access point through the second logic entity module, and informing the high-level management entity that the target access point is connected after the connection is successful;

the high-level management entity module is also used for indicating the first logic entity to execute the operation of disconnecting from the first logic access point through the high-level management entity;

the first logic entity module is further used for executing disconnection operation with the first logic access point through the first logic entity.

In a fourth aspect, an embodiment of the present invention provides an apparatus for switching a multi-link terminal device, where the apparatus includes:

the first access point module is used for receiving a link reconfiguration request signaling sent by a first logic entity of the multi-link terminal equipment through a first logic access point of the access equipment, and executing operation according to parameters in the link reconfiguration request signaling, wherein the link reconfiguration request signaling comprises parameters of an Action Type, a Dialog token, a Type, a link element and an Extension element, the Action Type is used for indicating the Type of a current process, the Dialog token is used for identifying the current process, the Type is used for indicating the Type of link reconfiguration and is set to delete a link, the link element is used for indicating link-related parameters, and the Extension element is used for indicating other related parameters to be reconfigured;

the first access point module is further configured to send a link reconfiguration response signaling to the first logic entity through the first logic access point;

and the first access point module is also used for executing disconnection operation with the first logic entity through the first logic access point.

In a fifth aspect, an embodiment of the present invention provides an apparatus, which includes a processor and a memory, where the memory stores at least one instruction, at least one piece of program code, a set of codes, or a set of instructions, and the at least one instruction, at least one piece of program code, a set of codes, or a set of instructions is loaded and executed by the processor to implement the method for handing over a multi-link terminal device according to the first aspect, or to implement the method for handing over a multi-link terminal device according to the second aspect.

In a sixth aspect, an embodiment of the present invention provides a computer-readable storage medium, where at least one instruction, at least one program code, a code set, or a set of instructions is stored in the computer-readable storage medium, and the at least one instruction, at least one program code, a code set, or a set of instructions is loaded and executed by a processor to implement the method for multi-link terminal device handover according to the first aspect, or to implement the method for multi-link terminal device handover according to the second aspect.

In a seventh aspect, an embodiment of the present invention provides a wireless transmission system, where the wireless transmission system includes a multi-link terminal device and an access device, and the multi-link terminal device is configured to implement the method for switching the multi-link terminal device according to the first aspect; the access device is used for realizing the method for switching the multi-link terminal device according to the second aspect.

It should be noted that, the apparatus in the third aspect is configured to execute the method in the foregoing first aspect, the apparatus in the fourth aspect is configured to execute the method in the foregoing second aspect, the device in the fifth aspect and the storage medium in the sixth aspect are configured to execute the method in the foregoing first aspect, or are configured to execute the method in the foregoing second aspect, so that the same beneficial effects as those of the method in the first aspect or the method in the second aspect may be achieved, and no description is given to embodiments of the present invention.

The invention provides a method, a device, equipment and a storage medium for reconfiguring a multi-link terminal equipment link, which ensures that the terminal equipment searches a proper access point for switching on the premise of not disconnecting the original service, and can keep the continuity of the service when the terminal roams among different access points.

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 be implemented as a separate entity, whether or not such embodiment is described in connection with its specific embodiments. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

In the embodiments of the present invention, words such as "exemplary", "for example", etc. are used 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 use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another, and may or may not be identical in meaning. 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.

In the embodiment of the present invention, both the terminal device and the access device include a lower layer management entity and a higher layer management entity, where the lower layer management entity is a unit for managing and controlling data transmission of the device, such as MLME and PLME, and the higher layer management entity is a unit for managing services or applications of the device, such as device management unit SME and application management unit ame (application management entity).

It should be noted that the multilink device includes a plurality of logic entities, each logic entity performs data transmission through one link, and each logic entity includes an independent data transceiver module. A conventional single-link device has only one logical entity and only one MAC address, while a multi-link device has one MAC address, and each logical entity belonging to the multi-link device has one MAC address, for example, if a multi-link device runs with 3 logical entities, there are four MAC addresses on the physical device, one is of the multi-link device, and each of the three logical entities has one MAC address. In the embodiment of the present invention, the address of the terminal may be an address of the terminal device or an address of a logical entity of the terminal device, and the address of the access point may be an address of the access device or an address of a logical entity of the access device.

In the following exemplary embodiment, the multi-link end device non-AP MLD1 has two logical entities STA1 and STA2, currently connected to the multi-link access device AP MLD1, and connected to the logical access points AP1 and AP2 of the multi-link access device AP MLD1, respectively. In some other embodiments, non-AP MLD1 may have more than two logical entities, AP MLD1 may also have more than two logical entities, and STA2 may not be connected to the access device, which may be regarded as a single-link device, which is not limited by the present invention.

In the embodiment of the invention, the method for switching the multilink terminal equipment comprises the following procedures:

AP MLD1 sends a DS-STA-NOTIFY primitive to the server after non-AP MLD1 connects, and examples of parameters contained in the primitive are shown in Table 1.

TABLE 1

Parameter(s)	Value of	Description of the invention
			STA address	Address of non-AP MLD1	Address of terminal
UpdateType	Add	Type of operation requested

2. After the server receives the DS-STA-NOTIFY primitive, an information representation such as table 2 is created.

TABLE 2

STA	AP
		Address of non-AP MLD1	Address of AP MLD1

STA1 scans surrounding APs and selects a target AP from the scanned APs when a wireless link changes, which is assumed to be AP3 in this embodiment.

STA1 sends a link reconfiguration request signaling, such as a link reconfiguration request frame to AP1, where an example of the parameters contained in the link reconfiguration request frame is shown in table 3.

TABLE 3

Assuming that the present embodiment uses STA2 to first switch to the target access point AP3, the link element setting is shown in table 4.

TABLE 4

Examples of the parameters contained in Extension elements are shown in Table 5.

TABLE 5

5, after receiving the link configuration request frame, the AP1 executes corresponding operation according to the parameters in the frame,

if the value of Type is remove, searching for information corresponding to the value of STA address in the logical entity of the access device corresponding to the value of AP address according to the information in the link element, deleting the information, and sending a link reconfiguration response signaling, such as a link reconfiguration response frame, to the STA1, where the frame includes parameter representation, such as table 6.

TABLE 6

And 6, after receiving the link reconfiguration response frame, the STA1 determines whether the response corresponds to the request sent in the step 5 according to the Dialog token, if so, checks the Status code, and if the value is SUCCESS, informs a high-level management entity of the non-AP MLD1, and the high-level management entity of the non-AP MLD1 instructs the STA2 to perform switching preparation operation.

7. When the value of Type in the link reconfiguration request frame is Remove, the AP1 also checks the value of Cause, and if it is Transition or ML Transition, reads the parameter Target BSS in Extension element, sends the DS-MAP-NOTIFY primitive to the server, and when the AP3 is subordinate to a single-link device, the examples of the parameters contained in the primitive are as in table 7.

TABLE 7

When the AP3 is affiliated with a multi-link device, assume a multi-link device AP MLD2, and examples of parameters contained in the primitives are as shown in table 8.

TABLE 8

8. After receiving the DS-MAP-NOTIFY primitive, the server modifies the local information representation, for example, as shown in Table 9 or Table 10, and sends the data to be sent to non-AP MLD1 to AP MLD1 and AP3, or AP MLD1 and AP MLD2, simultaneously according to the updated information.

TABLE 9

STA	AP
		Address of non-AP MLD1	Address of AP MLD1
Address of STA2	Address of AP3

Watch 10

STA	AP
		Address of non-AP MLD1	Address of AP MLD1
Address of non-AP MLD1	Address of AP MLD2

Next, STA2 performs a connection operation with AP3, and after STA2 and AP3 are successfully connected, STA1 and AP1 are disconnected, which is exemplified in the following specific procedures. In other embodiments, after the STA2 successfully connects to the AP3, if the non-AP MLD1 has two logical entities STA1 and STA3 connected to two logical access points AP1 and AP4 of the AP MLD1, the connection between the STA1 and the AP1 and the connection between the STA3 and the AP4 are disconnected. The scenarios of multiple logical entities are analogized and will not be described in detail here.

STA2 sends an authentication request to AP3 and performs a key exchange.

10, the STA2 sends an Association request frame or a Reassociation request frame to the AP3, wherein the frame comprises the address of the STA2 or/and the address of the non-AP MLD 1.

The AP3, upon acceptance, sends an Association response frame or a Reassociation response frame to the STA2, indicating acceptance of the connection request.

STA2, upon receiving the connection response frame, if acceptance of the connection request is indicated in the frame, starts exchanging data with AP3 and indicates that the higher management entity of non-AP MLD1 is connected to AP3 and that the current process type is Transition or ML Transition.

A higher layer management entity of non-AP MLD1 instructs STA1 to send a disconnect request frame to AP 1.

STA1, upon receiving the AP1 disconnect response frame, no longer exchanges data with AP 1.

The STA1 decrypts the received data packet from the AP1 by using the original key, and sends the decrypted data packet to the non-AP MLD1 data packet duplicate checking module.

The STA2 decrypts the received data packet from the AP3 by using the new key, and sends the decrypted data packet to the non-AP MLD1 data packet duplication check module.

And 17, deleting the data packet with the repeated sequence number by the non-AP MLD1 data packet repeated checking module according to the decrypted data packet sequence number, reordering the processed data packets, detecting the integrity, and sending the data packets to a high-level management entity of the non-AP MLD 1.

18. If AP3 is affiliated with multi-link device AP MLD2, STA2 may also send a link reconfiguration request frame to AP3, where the parameter Type is set to the newly added link in the link reconfiguration request frame, requesting to connect STA1 to other logical access points of AP MLD 2. In other embodiments, STA2 may request to connect multiple logical entities of non-AP MLD1 to other logical access points of AP MLD 2.

In another embodiment, the link configuration request frame in step 4 of the above embodiment does not include the parameter Cause, and does not include steps 7 and 8, and in step 11, after the AP3 sends the connection response frame, the DS-STA-NOTIFY primitive is sent to the server, where an example of the included parameter is shown in table 11.

TABLE 11

Parameter(s)	Value of	Description of the preferred embodiment
			STA address	Address of STA2 or address of non-AP MLD1	Terminal address
UpdateType	Add	Type of operation requested

After receiving the DS-STA-NOTIFY primitive, the server modifies the information representation, for example, table 12 or table 13, and sends the data to be sent to non-AP MLD1 to AP MLD1 and AP3, or AP MLD1 and AP MLD2, simultaneously according to the updated information.

TABLE 12

STA	AP
		Address of non-AP MLD1	Address of AP MLD1
Address of STA2	Address of AP3

Watch 13

The embodiment of the invention also provides a device for switching the multilink terminal equipment, which comprises:

Optionally, the second logical entity module is further configured to send a link reconfiguration request signaling to the target access point through the second logical entity if the target access point is affiliated to the multilink device, set the parameter Type to a newly added link in the request signaling, and request that the first logical entity is connected to another access point of the multilink device.

Optionally, the first logical entity module is further configured to scan surrounding access points through the logical entity, and when a wireless link changes, select a target access point from the scanned access points.

the first access point module is further configured to send a link reconfiguration response signaling to the first logical entity through the logical access point;

the first access point module is further configured to perform, through the first logical access point, an operation of disconnecting from the first logical entity.

Optionally, the first access point module is further configured to, if the parameter Type in the link reconfiguration request signaling indicates that a link is requested to be deleted, search, by the first logical access point, information corresponding to the value of the STA address in the logical entity of the access device corresponding to the value of the AP address according to information in the parameter link element, and delete the information.

Optionally, if the link reconfiguration request signaling includes a parameter Cause, the first access point module is further configured to, when a parameter Type in the link reconfiguration request signaling indicates to delete a link, check a value of the parameter Cause through the first logical access point, if the parameter Cause indicates that the current reconfiguration request is handover or multi-link handover, read a parameter Target BSS in the Extension element, and send a DS-MAP-NOTIFY primitive to the server, where the parameter Target BSS is set to an address of a Target access point or an address of a multi-link device to which the Target access point belongs, where the DS-MAP-NOTIFY primitive includes parameters STA address, AP address, and Update Type, where the parameter STA address is used to indicate an address of the terminal, the AP address is used to indicate an address of the access point, and the Update Type is used to indicate an operation Type of the request.

The embodiment of the present invention further provides a device, where the device includes a processor and a memory, where the memory stores at least one instruction, at least one section of program code, a code set, or an instruction set, and the at least one instruction, at least one section of program code, a code set, or an instruction set is loaded and executed by the processor, so as to implement the method for switching a multi-link terminal device according to the foregoing embodiment.

The embodiment of the present invention further provides a computer-readable storage medium, where at least one instruction, at least one section of program code, a code set, or an instruction set is stored in the computer-readable storage medium, and the at least one instruction, the at least one section of program code, the code set, or the instruction set is loaded and executed by a processor, so as to implement the method for multi-link terminal device handover according to the foregoing embodiment.

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

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 technical solution. 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 units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed.

The units 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 units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units 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 units are integrated into one unit.

The functions may be stored in a computer-readable storage medium if they are implemented in the form of software functional units and sold or used as separate products. 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 device, 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 disk or optical disk, etc. on which various types of program codes can be stored.

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. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. The character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.

The word "if" or "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.

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 for switching a multi-link terminal device is applied to the multi-link terminal device, the multi-link terminal device comprises a high-level management entity and at least two logic entities, and the at least two logic entities comprise a logic entity I and a logic entity II, and the method comprises the following steps:

the logic entity II executes the connection operation with the target access point, and after the connection is successful, the logic entity II informs the high-level management entity that the logic entity II is connected with the target access point, and the high-level management entity indicates the logic entity I to execute the operation of disconnecting the logic entity II from the logic access point I;

2. The method according to claim 1, wherein the link reconfiguration response signaling contains parameters Action type, Status code and Dialog token, the parameter Action type is used to indicate the type of the current process, Status code is used to indicate whether to accept the request, and Dialog token is used to identify the current process.

3. The method according to claim 1, wherein the link reconfiguration request signaling further includes a parameter Cause, and the parameter Cause is used to indicate a Cause of a current reconfiguration request.

4. The method according to claim 1, wherein the link element includes parameters STA address and AP address, the parameter STA address is used to indicate an address of the terminal and is set as an address of a logical entity of the terminal device on the link, and the AP address is used to indicate an address of the access point and is set as an address of a logical entity of the access device on the link.

5. The method of claim 1, wherein the Extension element comprises a parameter Target BSS, and the parameter Target BSS is set as an address of a Target access point or an address of a multi-link device to which the Target access point belongs.

6. A method for handover of a multi-link terminal device according to any of claims 1-5, characterised in that the method further comprises:

and if the target access point belongs to the multilink equipment, the second logic entity sends a link reconfiguration request signaling to the target access point, sets the parameter Type as a newly added link in the request signaling, and requests to connect the first logic entity to the second logic access point of the multilink equipment.

7. The method according to any of claims 1-5, further comprising, before the logical entity sends the link reconfiguration request signaling to the first logical access point of the access device:

and once the logical entity scans surrounding access points, when the wireless link changes, the logical entity selects a target access point from the scanned access points.

8. A method for handover of a multi-link terminal device according to any of claims 1-5, characterised in that the method further comprises:

the first logic entity decrypts the data packet received from the first logic access point by using the key, and sends the decrypted data packet to the data packet repeated check module of the multilink terminal equipment;

the second logic entity decrypts the data packet received from the target access point by using the second key pair, and sends the decrypted data packet to the data packet repeated check module of the multilink terminal equipment;

and the multilink terminal equipment data packet repetition checking module deletes the data packet with the repeated serial number according to the decrypted data packet serial number, reorders the processed data packet, and sends the data packet to a high-level management entity after integrity detection.

9. A method of multi-link terminal device handover, the method comprising:

a first logic access point of the access equipment receives a link reconfiguration request signaling sent by a first logic entity of the multi-link terminal equipment, and executes operation according to parameters in the link reconfiguration request signaling, wherein the link reconfiguration request signaling comprises parameters of an Action Type, a Dialog token, a Type, a link element and an Extension element, the Action Type is used for indicating the Type of a current process, the Dialog token is used for identifying the current process, the Type is used for indicating the Type of link reconfiguration and is set to delete a link, the link element is used for indicating link related parameters, and the Extension element is used for indicating other related parameters of reconfiguration;

10. The method according to claim 9, wherein the link reconfiguration response signaling includes parameters Action type, Status code and Dialog token, the parameter Action type is used to indicate the type of the current process, Status code is used to indicate whether to accept the request, and Dialog token is used to identify the current process.

11. The method according to claim 9, wherein the link element includes parameters STA address and AP address, the parameter STA address is used to indicate an address of the terminal and is set as an address of a logical entity of the terminal device on the link, and the AP address is used to indicate an address of the access point and is set as an address of a logical entity of the access device on the link.

12. The method of claim 11, wherein the performing an operation according to the parameters in the link reconfiguration request signaling comprises:

if the parameter Type in the link reconfiguration request signaling indicates that the link is requested to be deleted, the first logic access point searches for information corresponding to the STA address value in the logic entity of the access device corresponding to the AP address value according to the information in the parameter link element, and deletes the information.

13. The method according to any of claims 9-12, wherein said link reconfiguration request signaling further comprises a parameter Cause, said parameter Cause being used to indicate a Cause of a current reconfiguration request.

14. The method of claim 13, wherein the method further comprises:

when a parameter Type in a link reconfiguration request signaling indicates to delete a link, a logic access point checks a value of a parameter Cause, and if the parameter Cause indicates that the reason of a current reconfiguration request is handover or multilink handover, reads a parameter Target BSS in Extension element, and sends a DS-MAP-NOTIFY primitive to a server, where the parameter Target BSS is set as an address of a Target access point or an address of a multilink device to which the Target access point belongs, the DS-MAP-NOTIFY primitive includes parameters STA address, AP address and Update Type, the parameter STA address is used to indicate an address of a terminal, the AP address is used to indicate an address of the access point, and the Update Type is used to indicate an operation Type of the request.

15. The method according to claim 14, wherein the Update Type is set to increase, when the target access point belongs to a single-link device, the parameter STA address in the DS-MAP-NOTIFY primitive is set to the address of the second logical entity of the multi-link terminal device, and the AP address is set to the address of the target access point; when the target access point belongs to the multilink equipment, the parameter STA address in the DS-MAP-NOTIFY primitive is set as the address of the multilink terminal equipment, and the AP address is set as the address of the multilink equipment to which the target access point belongs.

16. A method for handover of a multi-link terminal device according to any of claims 9-12, further comprising:

and after sending a connection response frame to a logic entity II of the multilink terminal equipment, the target access point sends a DS-STA-NOTIFY primitive to the server, wherein the DS-STA-NOTIFY primitive comprises parameters STA address and UpdateType, the parameter STA address is used for indicating the address of the terminal, and the UpdateType is used for indicating the operation Type of the request.

17. The method according to claim 16, wherein the Update Type is set to increase, and when the target access point belongs to a single-link device, the parameter STA address in the DS-STA-NOTIFY primitive is set to the address of the logical entity two of the multi-link terminal device; and when the target access point belongs to the multilink equipment, setting the parameter STA address in the DS-STA-NOTIFY primitive as the address of the multilink terminal equipment.

18. An apparatus for multi-link terminal device handover, the apparatus comprising:

the first logic entity module is further configured to notify a high-level management entity through a first logic entity that the access device accepts the link reconfiguration request;

19. An apparatus for multi-link terminal device handover, the apparatus comprising:

20. An apparatus, characterized in that the apparatus comprises a processor and a memory, in which at least one instruction, at least one piece of program code, a set of codes, or a set of instructions is stored, which is loaded and executed by the processor to implement the method of multi-link terminal device handover as defined in any of claims 1-8, or to implement the method of multi-link terminal device handover as defined in any of claims 9-17.

21. A computer readable storage medium having stored therein at least one instruction, at least one section of program code, a set of codes, or a set of instructions, which is loaded and executed by a processor to implement the method of multi-link terminal device handover as claimed in any one of claims 1 to 8, or to implement the method of multi-link terminal device handover as claimed in any one of claims 9 to 17.

22. A wireless transmission system, characterized in that the wireless transmission system comprises a multi-link terminal device and an access device, the multi-link terminal device is used for realizing the method of multi-link terminal device switching according to any one of claims 1-8; the access device is used for implementing a method of multi-link terminal device handover as claimed in any of claims 9-17.