WO2024229673A1 - Wireless roaming method and apparatus - Google Patents

Abstract

The present invention relates to the technical field of communications. Disclosed are a wireless roaming method and apparatus. According to the present invention, a multi-link device sends a link addition request to an electronic device currently connected to the multi-link device or a roaming target, and receives a link addition response sent by said electronic device or the roaming target, and then the multi-link device receives a link deletion notification from said electronic device or the roaming target, or sends a link deletion notification to said electronic device or the roaming target, so that the multi-link device first establishes a connection with the roaming target and then is disconnected from said electronic device. Therefore, the connection is not disconnected during the movement, services remain online, and user experience is improved.

Description

Wireless roaming method and device Technical Field

The present invention relates to the field of communication technology, and in particular to a wireless roaming method and device.

Background Art

802.11 networks, also known as wireless local area networks (WLANs), are enhanced through a range of system features and multiple mechanisms to achieve high wireless LAN throughput. As the use of wireless local area networks (WLANs) continues to grow, they are increasingly important for providing wireless data services in many environments, such as homes, enterprises, and hotspots. In particular, video traffic will continue to be the dominant type of traffic in many WLAN deployments. The throughput requirements of these applications are evolving due to the emergence of 4k and 8k video (uncompressed rates of 20Gbps). New high-throughput, low-latency applications such as virtual or augmented reality, gaming, remote offices, and cloud computing will proliferate (e.g., latency below 5ms for real-time gaming).

Given the high throughput and stringent real-time latency requirements of these applications, users expect higher throughput, improved reliability, reduced latency, and improved power efficiency when supporting their applications over WLAN. The 802.11be system is designed to ensure the competitiveness of WLAN by further increasing overall throughput and reducing latency while ensuring backward compatibility and coexistence with older technology standards.

Summary of the invention

Currently, wifi networks do not support mobility. When a terminal moves from the range of one access point to the range of another access point, the terminal will disconnect, search and connect to the new access point again, which will cause the connection to be interrupted. When the connection interruption time exceeds the service reconnection attempt time, the network status of the application on the terminal will be disconnected, resulting in the service also needing to reconnect, authenticate and authenticate operations, and even when the reconnection time is long, the application will be completely offline, such as online shopping being terminated, online games being exited, etc., which greatly reduces the user experience. In view of this, the present invention provides a wireless roaming method and device to ensure that the connection will not be disconnected.

In a first aspect, the present invention provides a wireless roaming method, comprising:

The multi-link device determines that the roaming target is the second electronic device;

The multi-link device sends a first message to the first electronic device or the second electronic device, wherein the first message is used to request a new link, and the first message indicates that the link target is the second electronic device, wherein the first electronic device and the second electronic device are non-co-located physical devices;

The multi-link device receives a second message sent by the first electronic device or the second electronic device, wherein the second message indicates whether a link is added successfully;

If the second message indicates that the link is successfully added, the multi-link device receives the first electronic device or the second electronic device. The device sends a third message, or sends a third message to the first electronic device or the second electronic device, wherein the third message is used to indicate deletion of the link, and the deletion target indicated in the third message is the first electronic device;

The multi-link device performs data communication with the second electronic device.

In a second aspect, the present invention provides a wireless roaming method, comprising:

The first electronic device receives a first message sent by the multi-link device, where the first message is used to request a new link, and the first message indicates that the link target is a second electronic device, wherein the first electronic device and the second electronic device are non-co-located physical devices;

The first electronic device sends a fourth message to the second electronic device, where the fourth message includes information about the multi-link device and is used to indicate that the multi-link device requests to add a new link with the second electronic device;

Also includes any one or more of the following:

The first electronic device receives a third message sent by the multi-link device or sends a third message to the multi-link device, wherein the third message is used to indicate deletion of a link, and the deletion target indicated in the third message is the first electronic device;

The first electronic device receives a fifth message sent by the second electronic device, where the fifth message is used to indicate that the roaming is completed.

In a third aspect, the present invention provides a wireless roaming method, comprising:

The second electronic device receives a fourth message sent by the first electronic device, or receives a first message sent by the multi-link device, wherein the fourth message includes information of the multi-link device, and is used to indicate that the multi-link device requests to add a new link with the second electronic device; the first message is used to request to add a new link, and the link target indicated in the first message is the second electronic device, wherein the first electronic device and the second electronic device are non-co-located physical devices;

Also includes any one or more of the following:

The second electronic device sends a second message to the multi-link device, where the second message indicates whether the link is added successfully;

The second electronic device sends a fifth message to the first electronic device, where the fifth message is used to indicate that the roaming is completed;

The second electronic device sends a sixth message to the first electronic device, where the sixth message is used to indicate confirmation of the newly added link.

In a fourth aspect, the present invention provides a wireless roaming device, including a wireless roaming module, wherein the wireless roaming module is used to perform the following steps:

Determining, by the multi-link device, that the roaming target is the second electronic device;

Sending a first message to a first electronic device or a second electronic device through a multi-link device, wherein the first message is used to request a new link, and the first message indicates that the link target is the second electronic device, wherein the first electronic device and the second electronic device are non-co-located physical devices;

receiving, by the multi-link device, a second message sent by the first electronic device or the second electronic device, wherein the second message indicates whether a link is added successfully;

If the second message indicates that the link is added successfully, receiving a third message sent by the first electronic device or the second electronic device through the multi-link device, or sending a third message to the first electronic device or the second electronic device, wherein the third message is used to indicate deletion of the link, and the deletion target indicated in the third message is the first electronic device;

Data communication is performed with the second electronic device through the multi-link device.

In a possible implementation manner, the wireless roaming module is further configured to perform the following steps:

Acquire roaming information from the first electronic device through the multi-link device, wherein the roaming information includes an identifier of a neighboring device and mobility management group information;

The second electronic device is one of the neighboring devices indicated by the roaming information, and the first electronic device and the second electronic device belong to the same mobility management group.

In a possible implementation manner, determining, by the multi-link device, that the roaming target is the second electronic device includes:

receiving, through the multi-link device, an instruction to perform roaming sent by the first electronic device;

The multi-link device determines that the roaming target is the second electronic device according to the identifier of the roaming target included in the indication, or the multi-link device measures the adjacent devices indicated in the roaming information and belonging to the same mobility management group as the first electronic device, and determines that the roaming target is the second electronic device according to the measurement result.

In a possible implementation manner, determining, by the multi-link device, that the roaming target is the second electronic device includes:

measuring the first electronic device by means of a multi-link device;

If the signal strength of the first electronic device meets the preset condition, the adjacent devices indicated in the roaming information and belonging to the same mobility management group as the first electronic device are measured by the multi-link device, and the roaming target is determined as the second electronic device according to the measurement result.

In a possible implementation manner, the third message further indicates a remaining time for deleting the link, and the wireless roaming module is further configured to perform the following steps:

The multi-link device disconnects the first electronic device according to the remaining duration of the deleted link.

In a fifth aspect, the present invention provides a wireless roaming device, including a wireless roaming module, wherein the wireless roaming module is used to perform the following steps:

Receiving, by a first electronic device, a first message sent by a multi-link device, wherein the first message is used to request a new link, and the first message indicates that the link target is a second electronic device, wherein the first electronic device and the second electronic device are non-co-located physical devices;

Sending a fourth message to the second electronic device through the first electronic device, wherein the fourth message includes information about the multi-link device and is used to indicate that the multi-link device requests to add a new link with the second electronic device;

The wireless roaming module is further configured to perform any one or more of the following:

Receiving a third message sent by the multi-link device through the first electronic device or sending a third message to the multi-link device, wherein the third message is used to indicate deletion of the link, and the deletion target indicated in the third message is the first electronic device;

A fifth message sent by the second electronic device is received by the first electronic device, where the fifth message is used to indicate that the roaming is completed.

In a possible implementation manner, the wireless roaming module is further configured to perform the following steps:

Sending roaming information through the first electronic device, where the roaming information includes an identifier of a neighboring device and mobility management group information;

The second electronic device is one of the neighboring devices indicated by the roaming information, and the first electronic device and the second electronic device belong to the same mobility management group.

In a possible implementation manner, the wireless roaming module is further configured to perform the following steps:

Receiving, by the first electronic device, a sixth message sent by the second electronic device, wherein the sixth message is used to confirm the newly added link;

The first electronic device sends a second message to the multi-link device, where the second message indicates whether the link is added successfully.

In a possible implementation manner, the wireless roaming module is further configured to perform the following steps:

Sending a trigger message through the first electronic device, the trigger message including data sending information, and instructing the second electronic device to jointly send data to the multi-link device according to the data sending information, and instructing the multi-link device to receive downlink data, wherein the data sending information is used to calculate the end time of the data packet;

The first electronic device sends data to the multi-link device.

In a sixth aspect, the present invention provides a wireless roaming device, including a wireless roaming module, wherein the wireless roaming module is used to perform the following steps:

Receiving, by the second electronic device, a fourth message sent by the first electronic device, or receiving a first message sent by the multi-link device, wherein the fourth message includes information about the multi-link device and is used to indicate that the multi-link device requests to add a link with the second electronic device; the first message is used to request to add a link, and the link target indicated in the first message is the second electronic device, wherein the first electronic device and the second electronic device are non-co-located physical devices;

The wireless roaming module is further configured to perform any one or more of the following:

Sending a second message to the multi-link device through a second electronic device, wherein the second message indicates whether a link is added successfully;

Sending a fifth message to the first electronic device through the second electronic device, where the fifth message is used to indicate that the roaming is completed;

A sixth message is sent to the first electronic device through the second electronic device, where the sixth message is used to indicate confirmation of the newly added link.

In a possible implementation manner, the wireless roaming module is further configured to perform the following steps:

The third message sent by the multi-link device is received by the second electronic device or is sent to the multi-link device, wherein the third message is used to indicate deletion of the link, and the deletion target indicated in the third message is the first electronic device.

In a possible implementation manner, the wireless roaming module is further configured to perform the following steps:

receiving, by the second electronic device, a trigger message sent by the first electronic device, the trigger message including data sending information, instructing the second electronic device to jointly send data to the multi-link device according to the data sending information, and instructing the multi-link device to receive downlink data, Wherein, the data transmission information is used to calculate the time when the data packet ends;

Obtaining, by the second electronic device according to the data transmission information, the time when the data packet sent by the first electronic device to the multi-link device ends;

The second electronic device sends data to the multi-link device according to the obtained time when the data packet sent by the first electronic device to the multi-link device ends, so that the data packets sent by the second electronic device and the first electronic device to the multi-link device end at the same time.

In a seventh aspect, the present invention provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the method described in the first aspect, the second aspect, or the third aspect.

In an eighth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method described in the first aspect, the second aspect, or the third aspect.

In a ninth aspect, the present invention provides a computer program product comprising a computer-readable code, or a non-volatile computer-readable storage medium carrying a computer-readable code, wherein when the computer-readable code runs in an electronic device, the processor in the electronic device executes the method described in the first aspect, the second aspect, or the third aspect.

It should be noted that the device described in the fourth aspect is used to execute the method provided in the first aspect, the device described in the fifth aspect is used to execute the method provided in the second aspect, the device described in the sixth aspect is used to execute the method provided in the third aspect, the electronic device described in the seventh aspect, the storage medium described in the eighth aspect and the computer program product described in the ninth aspect are used to execute the method provided in the first aspect, the second aspect or the third aspect, so the same beneficial effects as the methods described in the first aspect, the second aspect or the third aspect can be achieved, and the present invention will not go into details one by one.

The present invention sends a new link request to a currently connected electronic device or a roaming target through a multi-link device, and receives a new link response sent by the currently connected electronic device or the roaming target, and then the multi-link device receives a link deletion notification from the currently connected electronic device or the roaming target, or sends a link deletion notification to the currently connected electronic device or the roaming target, so that the multi-link device first establishes a connection with the roaming target and then disconnects from the currently connected electronic device, so that the connection will not be disconnected during the movement process, the service remains online, and the user experience is improved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of a communication system provided by an embodiment of the present invention;

FIG2 is a flow chart of a wireless roaming method provided by an embodiment of the present invention;

FIG3 is a schematic diagram of a wireless roaming method provided by an embodiment of the present invention;

FIG4 is a schematic diagram of another wireless roaming method provided by an embodiment of the present invention;

FIG5 is a schematic diagram of another wireless roaming method provided by an embodiment of the present invention;

FIG6 is a schematic diagram of another wireless roaming method provided by an embodiment of the present invention;

FIG. 7 is a schematic diagram of the structure of an electronic device provided by 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. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Although the disclosure in the present invention is introduced according to one or several exemplary examples, it should be understood that each aspect of these disclosures can also constitute a complete technical solution separately. In the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other.

In the embodiments of the present invention, "at least one item" refers to one or more items, and "multiple items" refers to two or more items. In order to facilitate the clear description of the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, the words "first", "second", etc. are used to distinguish the same items or similar items with basically the same functions and effects. Those skilled in the art can understand that the words "first", "second", etc. do not limit the quantity and execution order. They are only used to illustrate and distinguish the description objects. There is no order, nor does it indicate a special limitation on the number of devices or messages in the embodiments of the present invention, and cannot constitute any limitation on the embodiments of the present invention. The term "including" is used to indicate the existence of the features declared thereafter, but does not exclude the addition of other features.

First, the multi-link technology involved in the embodiment of the present invention is briefly described. In a multi-link scenario, a physical device may generally include multiple logical entities. The physical device here may refer to devices such as mobile phones, televisions, and projectors. The logical entity may refer to a logical unit in the physical device, which belongs to a virtual functional module. One logical entity corresponds to a transceiver. Each logical entity can independently manage data transmission and reception, and each logical entity works independently on a link. Such a physical device is called a multi-link device (MLD). A single-link device includes only one logical entity. In the embodiment of the present invention, the logical entity in a multi-link terminal device is called a logical terminal, and the logical entity in a multi-link access point device is called a logical access point.

Fig. 1 is a schematic diagram of the structure of a communication system provided by an embodiment of the present invention. As shown in Fig. 1, the communication system includes multi-link access point devices AP MLD1 and AP MLD2, and a multi-link terminal device STA MLD1. AP MLD1 and AP MLD2 can form a multi-access point (AP) network through a wired or wireless backhaul, so as to exchange data and control and/or management commands and/or parameters in the network.

The multi-link access point device AP MLD1 and the multi-link access point device AP MLD2 both contain two logical access points. AP MLD1 contains logical access points AP1 and AP2, and AP MLD2 contains logical access points AP3 and AP4. They can operate on two links, which are expressed as link link1 and link link2 for the convenience of description. The multi-link terminal device STA MLD1 contains two logical terminals STA1 and STA2, which can operate on the two links corresponding to the multi-link access point devices.

In the embodiment of the present invention, the link identifier can be used to uniquely identify a logical access point within a multi-link access point device. Different multi-link access point devices can set the link identifier to different values. For example, the link identifier in AP MLD2 The link identifiers may be link3 and link4, which correspond to link1 and link2 of AP MLD1 on the physical channel, respectively, that is, link1 and link3 use the same channel configuration, and link2 and link4 use the same channel configuration. For the convenience of description and correspondence, the embodiment of the present invention uses the same set of link identifiers in different multi-link access point devices.

In the embodiment of the present invention, an access point (AP) refers to a wireless access point device that supports the 802.11 protocol and has the function of wireless transceiving, such as a router, a wireless switch, etc.; a terminal refers to a device that supports the 802.11 protocol and has the function of wireless transceiving, such as a mobile phone, a computer, a television, a projector, etc. It should be understood that FIG. 1 is only a schematic diagram of the architecture of a communication system, and the number and type of devices in the communication system are not limited in the embodiment of the present invention. For example, more terminals or access points may be included, and the terminals and access points may be multi-link devices or single-link devices, and the number of logical entities in different multi-link devices may also be different. In addition, those skilled in the art will understand that according to the principles and functions described herein, the term "access point (AP)" according to the present application can also be used to describe an access port or any other access point that can receive and transmit wireless signals within a network architecture, and therefore, the use of access points is only exemplary.

FIG2 is a flow chart of a wireless roaming method provided by an embodiment of the present invention. As shown in FIG2, the wireless roaming method includes the following contents:

S201, STA MLD1 determine the roaming target.

When STA MLD1 needs to roam, a roaming target is determined. For example, when one of the following conditions is met, it can be considered that STA MLD1 needs to roam:

1) Receive the instruction from AP MLD1 and instruct STA MLD1 to perform roaming;

2) The signal strength of AP MLD1 measured by STA MLD1 is continuously less than or equal to the threshold value T1.

STA MLD1 can determine the roaming target by any of the following methods:

1) The indication sent by AP MLD1 to STA MLD1 contains the identifier of the roaming target;

2) STA MLD1 measures the adjacent access points and selects the access point whose signal strength meets one of the following conditions as the roaming target:

A) The signal strength of the access point continues to be greater than the threshold value T2;

B) The value of the access point’s signal strength minus the AP MLD1’s signal strength continues to be greater than the threshold value T3; the duration can be the preset time1, or AP MLD1 sends it to STA MLD1 during or after the connection establishment process.

In some embodiments, STA MLD1 can roam only between access points within a certain range. For example, AP MLD1 can send roamable access point information to STA MLD1, and STA MLD1 selects a roaming target from the roamable access points indicated by AP MLD1. For example, the access points are grouped, and STA MLD1 can only select a roaming target from the access points that belong to the same group as the currently connected AP MLD1. The embodiment of the present invention does not limit the manner in which STA MLD1 obtains the access point grouping information, such as pre-setting or obtaining from AP MLD1. The following is an exemplary method for obtaining the access point grouping information from AP MLD1. Method:

STA MLD1 obtains roaming information from AP MLD1. The roaming information can be a new parameter added to the existing neighbor information element to indicate that the neighboring access point supports roaming, or it can be an independent information element dedicated to indicating the information of the roaming access point. The acquisition method can be:

1) Obtained by reading the broadcast message sent by AP MLD1;

or,

2) Obtained from the connection response message sent by AP MLD1 during the connection process;

or,

3) Obtain it from the AP MLD1 response message by sending a proprietary information request message, such as a roaming request message or a multi-link detection request message.

Roaming information contains information about one or more access points. The information about each access point may include the following parameters:

AP ID: access point identifier;

MMG ID: The ID of the mobility management group to which the access point belongs. It should be noted that the mobility management group can be a multi-access point management group or a multi-access point cooperative operation group. Optionally, this parameter can be used directly to indicate whether it belongs to the same mobility management group as AP MLD1. If it is set to 0, it means that it belongs to the same mobility management group as AP MLD1. If it is set to 1, it means that it does not belong to the same mobility management group as AP MLD1.

Among them, AP ID is used for STA MLD1 to identify an access point. It can be an independent identifier, such as BSSID, or the MAC address of the access point, or the identifier link ID of the link operated by the access point, or it can be a collection of a group of identifiers, such as (MLD ID, link ID). MLD ID is used to identify a multi-link device.

In this embodiment, the roaming target determined by STA MLD1 belongs to the same mobility management group as AP MLD1. In the above-mentioned method 2) for STA MLD1 to determine the roaming target, STA MLD1 measures the access points indicated in the roaming information obtained from AP MLD1, or only measures the access points indicated in the roaming information obtained from AP MLD1 that belong to the same mobility management group as AP MLD1.

In an embodiment of the present invention, STA MLD1 and AP MLD1 establish a connection on link link1, as shown in FIG1, that is, the number of links connected between STA MLD1 and AP MLD1 is less than the number of links supported by STA MLD1 to be connected simultaneously, and then the roaming target is determined in the access point operating on the link link2 to which STA MLD1 has not established a connection. In some other embodiments, if the number of links connected between STA MLD1 and AP MLD1 is equal to the number of links supported by STA MLD1 to be connected simultaneously, then the roaming target is determined in the access point operating on any link supported by STA MLD1; or the roaming target may also be determined in the access point operating on the link where the access point with the poor signal strength of the currently connected access point is located, for example, if the signal strength of AP1 is greater than the signal strength of AP2, then the access point operating on the link operated by AP2 is selected as the roaming target.

S202, STA MLD1 sends a new link request.

After STA MLD1 determines the roaming target, it sends a new link request, such as a multi-link reconfiguration request message, a roaming request message, or other control messages. It should be noted that the new link involved in the embodiment of the present invention refers to STA MLD1 establishing a new connection on a link different from the currently operated link.

In an embodiment of the present invention, STA MLD1 may send a new link request to the currently connected AP MLD1, and may also send a new link request to the roaming target AP MLD2. When STA MLD1 sends a new link request to AP MLD1, after AP MLD1 receives the new link request, if it is determined according to the new link request that the link target and the access point currently connected to STA MLD1 are non-co-located physical devices, then AP MLD1 sends a terminal information forwarding message to AP MLD2, instructing STA MLD1 to request a new link with AP MLD2. For example, the terminal information forwarding message may include link information, terminal capability parameters and/or operation parameters, and may also include configuration information between STA MLD1 and AP MLD1, such as block acknowledgment (block ack) information and/or TWT information negotiated between STA MLD1 and AP MLD1; if it is determined according to the new link request that the link target and the access point currently connected to STA MLD1 are co-located physical devices, then AP MLD1 does not need to send a terminal information forwarding message, and all operations of AP MLD2 are completed by AP MLD1. An example of a method in which AP MLD1 determines whether the link target and the access point currently connected to STA MLD1 are non-co-located physical devices or co-located physical devices according to the newly added link request is as follows:

If the newly added link request includes the address or BSSID of the link target, the address or BSSID of the link target can be compared with the address or BSSID of AP MLD1. If they are the same, they are co-located physical devices; if they are different, they are non-co-located physical devices. For another example, if the newly added link request includes an indication of whether they belong to the same multi-link device, if the indication is that they belong to the same multi-link device, they are co-located physical devices; if the indication is that they do not belong to the same multi-link device, they are non-co-located physical devices.

S203, STA MLD1 receives the new link response.

STA MLD1 can receive a new link response from the currently connected AP MLD1, and can also receive a new link response from the roaming target AP MLD2. The new link response indicates whether the new link is successfully added. The embodiment of the present invention assumes that the new link is successfully added.

In some embodiments, when STA MLD1 sends a new link request to AP MLD1, and AP MLD1 sends a new link response to STA MLD1, after AP MLD1 sends a terminal forwarding message to AP MLD2, it needs to receive a new link confirmation sent by AP MLD2, such as a new link confirmation message, or an ACK message in response to receiving the terminal forwarding message, confirming that AP MLD2 and STA MLD1 have successfully added a link, and then send a new link response to STA MLD1.

S204. STA MLD1 sends or receives a deletion link notification.

After STA MLD1 receives the response indicating that the link is successfully added, that is, STA MLD1 and AP MLD2 have established a connection, STA MLD1 and AP MLD1 disconnect. The disconnection method can be STA MLD1 sending a delete link notification to AP MLD1 or AP MLD2, or STA MLD1 receiving a delete link notification sent by AP MLD1 or AP MLD2.

In some embodiments, when STA MLD1 sends a delete link notification to AP MLD2, or AP MLD2 sends a delete link notification to STA MLD1, AP MLD2 also needs to send the delete link notification to AP MLD1. After AP MLD2 receives the delete link notification sent by STA MLD1, it sends a roaming completion message to AP MLD2.

In some embodiments, if the number of links connected between STA MLD1 and AP MLD1 is equal to the number of links supported by STA MLD1 for simultaneous connection, that is, STA MLD1 and AP MLD1 establish connections on two links, and the roaming target determined by STA MLD1 is AP4 operating on link link2, then STA MLD1 needs to first disconnect the connection between STA2 and AP2 operating on link link2, and then request to create a new link with AP MLD2 on link link2.

In this embodiment, the method of STA MLD1 disconnecting the connection with AP MLD1 on link link2 can refer to the existing technology, such as sending a disconnection request message to AP MLD1, or combining the disconnection and the request for adding a new link together, which is not limited in this embodiment of the present invention. For example, the new connection request sent by STA MLD1 may include parameters Reconfiguration 1 and Reconfiguration 2, where Reconfiguration 1 may include the following parameters:

Reconfiguration type: reconfiguration type. In this embodiment, it is set to "add", indicating that a new link is added.

AP ID: The ID of the access point, indicating the link target, that is, the roaming target determined by STA MLD1;

MMG ID: The identifier of the mobility management group to which the access point belongs.

Reconfiguration 2 can contain the following parameters:

Reconfiguration type: reconfiguration type. In this embodiment, it is set to "delete", which means deleting the link.

AP ID: The identifier of the access point, indicating the deletion target, that is, the logical access point in AP MLD1 that operates on the same link as the roaming target determined by STA MLD1.

Optionally, the new connection request sent by STA MLD1 may also include the following parameters:

Reconfiguration type: reconfiguration type, which is set to "update" in this embodiment, indicating that the current connected access point is changed;

Target AP ID: The updated access point ID, indicating the link target, that is, the roaming target determined by STA MLD1;

Source AP ID: The ID of the currently connected access point, indicating the deletion target, i.e., the logical access point in AP MLD1 that operates on the same link as the roaming target determined by STA MLD1;

MMG ID: Mobility Management Group ID.

In some embodiments, between step S203 and step S204, at this time, STA MLD1 is connected to AP1 of AP MLD1 through STA1, and is connected to AP4 of AP MLD2 through STA2. STA MLD1 may need to connect to AP MLD1. Perform data communication. For STA MLD1, if link1 and link2 are a STR link pair, data communication can be performed with reference to the existing communication method; if link1 and link2 are an NSTR link pair, it is necessary to consider whether link1 and link2 can send and/or receive data at the same time. In an embodiment of the present invention, if two links are a STR link pair, data can be sent and/or received on the two links at the same time; if the two links are an NSTR link pair, when data is sent on one of the two links, data cannot be received on the other link; or, when data is received on one of the two links, data cannot be sent on the other link.

For example, when link1 and link2 are an NSTR link pair for STA MLD1, the method for STA MLD1 to perform data communication with AP MLD1 includes the following:

If STA MLD1 needs to send data, it can send data in one of the following ways:

1) Only monitor link 1. If link 1 is idle, send the data to AP MLD1 on link 1, and AP MLD1 will forward the data to AP MLD2. If link 1 is not idle, do not send data.

2) Only monitor link2. If link2 is idle, send data to AP MLD2 on link2. If link2 is not idle, do not send data.

3) Monitor link1 and link2. If both link1 and link2 are idle, align the start time of sending data packets on link1 and link2, and send them to AP MLD1 and AP MLD2 at the same time. If only link1 is idle, send data to AP MLD1 only on link1. If only link2 is idle, send data to AP MLD2 only on link2.

4) Monitor link1 and link2. If link2 is idle, send data to AP MLD2 on link2. If link2 is not idle but link1 is idle, send data to AP MLD1 on link1. If neither link is idle, do not send data.

If AP MLD1 has downlink data to send to STA MLD1, the following will be executed:

S1001, AP MLD1 sends part or all of the data packets to be sent to STA MLD1 to AP MLD2.

S1002. AP MLD1 sends a trigger message (such as a trigger message), which may include the following parameters:

Data info: data transmission information, such as the size of the data packet, encoding strategy, etc., used to calculate the end time of the data packet;

STA info1: user information, which in this embodiment includes the identifier of AP MLD2, and is used to instruct AP MLD2 to send data to STA MLD1 according to the parameter Data info;

STA info2: user information, which in this embodiment includes the identifier of STA MLD1, used to indicate that STA MLD1 receives downlink data.

S1003, after receiving the trigger message, AP MLD2 calculates the end time of the data packet sent by AP MLD1 to STA MLD1 according to the parameter Data info. If AP MLD2 also competes for the sending opportunity, it sets the data packet sending duration according to the end time of the data packet sent by AP MLD1 to STA MLD1, so that the data sent by AP MLD2 to STA MLD1 is The difference between the end time of the packet and the end time of the data packet sent by AP MLD1 to STA MLD1 is less than or equal to the threshold value Th1.

S1004. After receiving the trigger message, STA MLD1 sends a response message to AP MLD1 on link1 and sends a response message to AP MLD2 on link2.

S1005. After receiving the response message, AP MLD1 waits for a preset interval and then sends a data packet to STA MLD1. After receiving the response message, AP MLD2 competes for the sending time and then sends a data packet to STA MLD1 that can end at the same time as AP MLD1. It should be understood that the simultaneous end here means that the end time of the data packet sent by AP MLD2 to STA MLD1 and the end time of the data packet sent by AP MLD1 to STA MLD1 are less than or equal to the threshold value Th1. For example, the threshold value Th1 can be 4μs, 8μs or 12μs, etc.

In some embodiments, AP MLD1 may send a data packet to STA MLD1 at a preset interval while sending a trigger message. AP MLD2 may wait for a preset interval to compete for a sending opportunity after receiving a trigger message sent by AP MLD1. After competing for the sending time, it may send a data packet to STA MLD1 that can end at the same time as AP MLD1. That is, STA MLD1 may not respond after receiving the trigger message sent by AP MLD1.

In some embodiments, if AP MLD1 has downlink data to send to STA MLD1, the following may also be executed:

S1101, AP MLD1 sends a trigger message (such as a trigger message), which may include the following parameters:

duration: sending duration;

STA info1: user information, which in this embodiment includes the identifier of AP MLD2, and is used to instruct AP MLD2 not to send data to STA MLD1 at the indicated time;

STA info2: user information, which in this embodiment includes the identifier of STA MLD1, used to indicate that STA MLD1 receives downlink data.

S1102. After receiving the trigger message, AP MLD2 does not send data to STA MLD1 within the duration indicated by the duration parameter in the message.

S1103. After receiving the trigger message, STA MLD1 sends a response message to AP MLD1.

S1104. After receiving the response message, AP MLD1 waits for a preset interval (such as short interframe space SIFS) and then sends a data packet to STA MLD1.

In order to better understand the present invention, the present invention is further described in conjunction with several specific embodiments. For the convenience of description, the following embodiments assume that the roaming target is the logical access point AP4 operated by AP MLD2 on the link link2.

FIG3 is a schematic diagram of a wireless roaming method provided by an embodiment of the present invention. As shown in FIG3 , the wireless roaming method includes the following contents:

S211, STA1 of STA MLD1 sends a multi-link reconfiguration request message (or a roaming request message, or other The control message (the embodiment of the present invention is described by taking the multi-link reconfiguration request message as an example) is sent to AP1 of AP MLD1, and the message may include the following parameters:

Reconfiguration type: reconfiguration type. In this embodiment, it is set to "add", indicating a request to add a new link.

MLD ID: multi-link device identifier, which is set to the address of AP MLD2 or other identifier in this embodiment;

AP ID (optional): the identifier of the target access point. In this embodiment, the device is the identifier of the logical access point AP2 operated by AP MLD2 on the link link2. Optionally, the target access point can also be determined by the MLD ID and the link identifier in the STA info, so this parameter may not be included.

STA info: terminal information, which may include link identification, terminal capability parameters, and/or terminal operation parameters. In this embodiment of the present invention, it is the information of STA2.

S212. After receiving the multi-link reconfiguration request message, if AP MLD1 determines based on the MLD ID that the target access point and the access point currently connected to STA MLD1 are non-co-located access points, AP MLD1 sends a terminal information forwarding message to AP MLD2. The terminal information forwarding message may include a link identifier, terminal capability parameters, or/and operation parameters (i.e., information included in the parameter STA info). Optionally, the terminal information forwarding message may also include configuration information between STA MLD1 and AP MLD1, such as block ack information negotiated between STA MLD1 and AP MLD1, or/and TWT information.

S213. After receiving the terminal information forwarding message, AP MLD2 sends a multi-link reconfiguration response message to STA MLD1, and the response message indicates that a new link is successfully added. It should be understood that AP MLD2 can send a multi-link reconfiguration response message to STA2 of STA MLD1 through the target access point AP4.

In the embodiment of the present invention, AP MLD2 indicates that a new link is successfully added, i.e., a connection is established with STA MLD1, and the two do not need to perform an association process.

S214. AP MLD2 sends a roaming completion message to AP MLD1, indicating that the roaming is completed.

S215. After receiving the roaming completion message, AP MLD1 sends a multi-link reconfiguration notification message to STA MLD1. The message may include the following parameters:

Reconfiguration type: reconfiguration type. In this embodiment, it is set to "delete", which means deleting the link.

Link ID: link identifier, the identifier of the link connecting AP MLD1 and STA MLD1. In this embodiment, it is set to link1.

Delete timer: Delete timer, used to indicate the remaining time of the link indicated by the deletion.

After receiving the notification message, STA MLD1 disconnects from AP MLD1 on link1 when the duration indicated by the Delete timer expires or within the duration indicated by the Delete timer.

AP MLD2 sends a DS-STA-Notify message to the server DS. The message may contain the following parameters:

updateType: message type. In this embodiment, it is set to move, indicating that the terminal moves to a different access point.

STA address: terminal address, which is set to the address of STA MLD1 in this embodiment.

FIG4 is a schematic diagram of another wireless roaming method provided by an embodiment of the present invention. As shown in FIG4 , the wireless roaming method includes the following contents:

S221. STA1 of STA MLD1 sends a multilink reconfiguration request message to AP1 of AP MLD1. The message may include the following parameters:

Reconfiguration type: reconfiguration type. In this embodiment, it is set to "add", indicating a request to add a new link.

MLD ID: multi-link device identifier, which is set to the address of AP MLD2 or other identifier in this embodiment;

AP ID (optional): the identifier of the target access point. In this embodiment, the device is the identifier of the logical access point AP2 operated by AP MLD2 on the link link2. Optionally, the target access point can also be determined by the MLD ID and the link identifier in the STA info, so this parameter may not be included.

STA info: terminal information, which may include link identification, terminal capability parameters, and/or terminal operation parameters. In this embodiment of the present invention, it is the information of STA2.

S222. After receiving the multi-link reconfiguration request message, if AP MLD1 determines based on the MLD ID that the target access point and the access point currently connected to STA MLD1 are non-co-located access points, AP MLD1 sends a terminal information forwarding message to AP MLD2. The terminal information forwarding message may include a link identifier, terminal capability parameters, or/and operation parameters (i.e., the information included in the parameter STA info). Optionally, the terminal information forwarding message may also include configuration information between STA MLD1 and AP MLD1, such as block ack information negotiated between STA MLD1 and AP MLD1, or/and TWT information, etc.

S223. After receiving the terminal information forwarding message, AP MLD2 sends a confirmation message to AP MLD1 to confirm the newly added link and indicate that the link has been successfully added.

In some embodiments, the confirmation message in step S223 may be an ACK message from AP MLD2 in response to receiving a terminal information forwarding message, thereby reducing signaling overhead.

S224. After receiving the confirmation message from AP MLD2, AP MLD1 sends a multi-link reconfiguration response message to STA MLD1. The response message indicates that the link is added successfully.

In some embodiments, if AP MLD1 has downlink data to send to STA MLD1, AP MLD1 sends it to STA MLD1 on link1, and sends the downlink data to AP MLD2, and AP MLD2 sends it to STA MLD1 on link2; if STA MLD1 has uplink data to send, it sends it to AP MLD2 on link2; if the uplink data needs to be sent to the server, AP MLD2 sends the data to AP MLD1, and AP MLD1 sends the data to the server.

S225. STA MLD1 sends a multi-link reconfiguration notification message to AP MLD2. The message may include the following parameters:

Reconfiguration type: reconfiguration type. In this embodiment, it is set to "delete", which means deleting the link.

AP ID or Link ID: an access point identifier or a link identifier, indicating the AP to be disconnected or the link to be disconnected. In this embodiment, it is set to indicate AP1 to which AP MLD1 is connected to STA MLD1, such as the address or other identifier of AP1, or to indicate link link1 to which AP MLD1 is connected to STA MLD1.

Optionally, STA MLD1 may also send a multi-link reconfiguration notification message to AP MLD2 only when the following conditions are met:

1) The signal strength of AP MLD2 continues to be higher than the threshold value T4;

or,

2) The value of the signal strength of AP MLD2 minus the signal strength of AP MLD1 continues to be higher than the threshold value T5.

S226. AP MLD2 sends a DS-STA-Notify message to the server DS. The setting of the DS-STA-Notify message can refer to the embodiment shown in Figure 3 and will not be repeated here.

AP MLD2 sends a roaming completion message to AP MLD1, indicating that the roaming is completed, and AP MLD1 disconnects from STA MLD1.

FIG5 is a schematic diagram of another wireless roaming method provided by an embodiment of the present invention. As shown in FIG5 , the wireless roaming method includes the following contents:

S231. STA1 of STA MLD1 sends a multi-link reconfiguration request message to AP1 of AP MLD1. The message may include the following parameters:

Reconfiguration type: reconfiguration type. In this embodiment, it is set to "add", indicating a request to add a new link.

MLD ID: multi-link device identifier, which is set to the address of AP MLD2 or other identifier in this embodiment;

AP ID (optional): the identifier of the target access point. In this embodiment, the device is the identifier of the logical access point AP2 operated by AP MLD2 on the link link2. Optionally, the target access point can also be determined by the MLD ID and the link identifier in the STA info, so this parameter may not be included.

STA info: terminal information, which may include link identification, terminal capability parameters, and/or terminal operation parameters. In this embodiment of the present invention, it is the information of STA2.

S232. After receiving the multi-link reconfiguration request message, if AP MLD1 determines that the target access point and the access point currently connected to STA MLD1 are non-co-located access points based on the MLD ID, AP MLD1 sends a terminal information forwarding message to AP MLD2. The terminal information forwarding message may include a link identifier, terminal capability parameters, or/and operation parameters (i.e., the information included in the parameter STA info). Optionally, the terminal information forwarding message may also include configuration information between STA MLD1 and AP MLD1, such as block ack information negotiated between STA MLD1 and AP MLD1, or/and TWT information, etc.

S233, after receiving the terminal information forwarding message, AP MLD2 sends a confirmation message to AP MLD1 to confirm the newly added link The link is added successfully.

In some embodiments, the confirmation message in step S223 may be an ACK message from AP MLD2 in response to receiving a terminal information forwarding message, thereby reducing signaling overhead.

S234. After receiving the confirmation message from AP MLD2, AP MLD1 sends a multi-link reconfiguration response message to STA MLD1. The response message indicates that the link is added successfully.

S235, AP MLD2 sends a DS-STA-Notify message to the server DS. The setting of the DS-STA-Notify message can refer to the embodiment shown in Figure 3, which will not be repeated here.

AP MLD2 sends a multi-link reconfiguration notification message to STA MLD1. The message may contain the following parameters:

Reconfiguration type: reconfiguration type. In this embodiment, it is set to "delete", which means deleting the link.

AP ID or Link ID: an access point identifier or a link identifier, indicating the AP to be disconnected or the link to be disconnected. In this embodiment, it is set to indicate AP1 that AP MLD1 is connected to STA MLD1, such as the address or other identifier of AP1, or link link1 that AP MLD1 is connected to STA MLD1.

Delete timer: Delete timer, indicating the remaining time to disconnect the indicated link.

S236. AP MLD2 sends a roaming completion message to AP MLD1, and AP MLD1 disconnects from STA MLD1.

FIG6 is a schematic diagram of another wireless roaming method provided by an embodiment of the present invention. As shown in FIG6 , the wireless roaming method includes the following contents:

S241. STA MLD1 sends a multi-link reconfiguration request message to AP MLD2. For example, STA MLD1 can send a multi-link reconfiguration request message to AP4 of AP MLD2 through STA2. The message may include the following parameters:

Reconfiguration type: reconfiguration type. In this embodiment, it is set to "add", indicating a request to add a new link.

MLD ID (optional): multi-link device identifier. In this embodiment, it is set to the address of AP MLD2 or other identifier.

AP ID (optional): the identifier of the target access point. In this embodiment, the device is the identifier of the logical access point AP2 operated by AP MLD2 on the link link2. Optionally, the target access point can also be determined by the MLD ID and the link identifier in the STA info, so this parameter may not be included.

STA info: terminal information, which may include link identification, terminal capability parameters, and/or terminal operation parameters.

S242. After AP MLD2 receives the multi-link reconfiguration request message, if it determines that the target access point is itself based on the MLD ID and/or AP ID, AP MLD2 sends a multi-link reconfiguration response message to STA MLD1. The response message indicates whether the new link is agreed. This embodiment assumes that the new link is agreed, that is, it indicates that the new link is successfully added.

AP MLD2 sends a DS-STA-Notify message to the server DS. The setting of the DS-STA-Notify message can refer to the embodiment shown in Figure 3 and will not be repeated here.

In some embodiments, the multi-link reconfiguration response message may also include a link for indicating disconnection from the indicated link. The remaining time parameter of the connected Delete timer.

S243. After receiving the multi-link reconfiguration response message, STA MLD1 sends a multi-link reconfiguration notification message to AP MLD1, instructing it to delete the link.

In some embodiments, if the multi-link reconfiguration response message includes a parameter Delete timer, after receiving the multi-link reconfiguration response message, STA MLD1 disconnects the connection with AP MLD1 on link1 when the duration indicated by the Delete timer expires, or disconnects the connection with AP MLD1 within the duration indicated by the Delete timer, and sends a multi-link reconfiguration notification message to AP MLD1.

An embodiment of the present invention further provides a wireless roaming device, including a wireless roaming module, wherein the wireless roaming module is used to perform the following steps:

Determining, by the multi-link device, that the roaming target is the second electronic device;

Sending a first message to a first electronic device or a second electronic device through a multi-link device, wherein the first message is used to request a new link, and the first message indicates that the link target is the second electronic device, wherein the first electronic device and the second electronic device are non-co-located physical devices;

receiving, by the multi-link device, a second message sent by the first electronic device or the second electronic device, wherein the second message indicates whether a link is added successfully;

If the second message indicates that the link is added successfully, receiving a third message sent by the first electronic device or the second electronic device through the multi-link device, or sending a third message to the first electronic device or the second electronic device, wherein the third message is used to indicate deletion of the link, and the deletion target indicated in the third message is the first electronic device;

Data communication is performed with the second electronic device through the multi-link device.

In an optional example, those skilled in the art may understand that the above-mentioned device may specifically be STA MLD1 in the above-mentioned embodiment, and the device may be used to execute each process and/or step corresponding to STA MLD1 in the above-mentioned method, and will not be described again here to avoid repetition.

An embodiment of the present invention further provides a wireless roaming device, including a wireless roaming module, wherein the wireless roaming module is used to perform the following steps:

Receiving, by a first electronic device, a first message sent by a multi-link device, wherein the first message is used to request a new link, and the first message indicates that the link target is a second electronic device, wherein the first electronic device and the second electronic device are non-co-located physical devices;

Sending a fourth message to the second electronic device through the first electronic device, wherein the fourth message includes information about the multi-link device and is used to indicate that the multi-link device requests to add a new link with the second electronic device;

The wireless roaming module is further configured to perform any one or more of the following:

receiving, by the first electronic device, a third message sent by the multi-link device or sending the third message to the multi-link device, The third message is used to instruct to delete the link, and the deletion target indicated in the third message is the first electronic device;

A fifth message sent by the second electronic device is received by the first electronic device, where the fifth message is used to indicate that the roaming is completed.

In an optional example, those skilled in the art may understand that the above-mentioned device may specifically be the AP MLD1 in the above-mentioned embodiment, and the device may be used to execute each process and/or step corresponding to the AP MLD1 in the above-mentioned method, and will not be described again here to avoid repetition.

An embodiment of the present invention further provides a wireless roaming device, including a wireless roaming module, wherein the wireless roaming module is used to perform the following steps:

Receiving, by the second electronic device, a fourth message sent by the first electronic device, or receiving a first message sent by the multi-link device, wherein the fourth message includes information about the multi-link device and is used to indicate that the multi-link device requests to add a link with the second electronic device; the first message is used to request to add a link, and the link target indicated in the first message is the second electronic device, wherein the first electronic device and the second electronic device are non-co-located physical devices;

The wireless roaming module is further configured to perform any one or more of the following:

Sending a second message to the multi-link device through a second electronic device, wherein the second message indicates whether a link is added successfully;

Sending a fifth message to the first electronic device through the second electronic device, where the fifth message is used to indicate that the roaming is completed;

A sixth message is sent to the first electronic device through the second electronic device, where the sixth message is used to indicate confirmation of the newly added link.

In an optional example, those skilled in the art may understand that the above-mentioned device may specifically be the AP MLD2 in the above-mentioned embodiment, and the device may be used to execute each process and/or step corresponding to the AP MLD2 in the above-mentioned method, and will not be described again here to avoid repetition.

It should be understood that the device here is embodied in the form of a functional module. The term "module" here may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a proprietary processor or a group processor, etc.) and a memory for executing one or more software or firmware programs, a merged logic circuit and/or other suitable components that support the described functions. The above-mentioned device has the function of implementing the corresponding steps in the above-mentioned method; the above-mentioned functions can be implemented by hardware, or by hardware executing the corresponding software implementation. The hardware or software includes one or more modules corresponding to the above-mentioned functions. In an embodiment of the present invention, the device may also be a chip or a chip system, such as a system on chip (SoC). The present invention is not limited here.

The embodiment of the present invention further provides an electronic device, and FIG7 is a schematic diagram of the structure of the electronic device provided by the embodiment of the present invention. As shown in FIG7, the device 300 includes a processor 301, a memory 302, and a communication interface 303, wherein the processor 301, the memory 302, and the communication interface 303 communicate with each other through a bus 304, and the memory 302 stores instructions that can be executed by the processor 301, and the instructions are loaded and executed by the processor 301 to control the communication interface 303 to send and/or receive signals.

It should be understood that the device 300 may be specifically the STA MLD1 or AP MLD1 or AP MLD2 in the above embodiment, or Alternatively, the functions of STA MLD1 or AP MLD1 or AP MLD2 in the above embodiments may be integrated in the device 300, and the device 300 may be used to execute the various steps and/or processes corresponding to STA MLD1 or AP MLD1 or AP MLD2 in the above embodiments. Optionally, the memory 302 may include a read-only memory and a random access memory, and provide instructions and data to the processor 301. A portion of the memory 302 may also include a non-volatile random access memory. For example, the memory 302 may also store information about the device type. The processor 301 may be used to execute the instructions stored in the memory 301, and when the processor 301 executes the instructions, the processor 301 may execute the corresponding various steps and/or processes in the above method embodiments.

It should be understood that in the embodiments of the present invention, the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software. The steps of the method disclosed in conjunction with the embodiment of the present invention can be directly embodied as being executed by a hardware processor, or can be executed by a combination of hardware and software modules in a processor. The software module can be located in a mature storage medium in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in a memory, and the processor executes the instructions in the memory, and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it will not be described in detail here.

The above embodiments can be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented by software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the process or function described in the embodiment of the present invention is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state hard disk.

It should be understood that in various embodiments of the present invention, the size of the sequence number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention. The modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, that is, they may be located in one place, or they may be distributed on multiple network modules, and some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiment of the present invention.

In the several embodiments provided by the present invention, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation. For example, a module or component can be divided into multiple modules or components, or multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

Those skilled in the art will appreciate that the modules and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (15)

A wireless roaming method, comprising: The multi-link device determines that the roaming target is the second electronic device; The multi-link device sends a first message to the first electronic device or the second electronic device, wherein the first message is used to request a new link, and the first message indicates that the link target is the second electronic device, wherein the first electronic device and the second electronic device are non-co-located physical devices; The multi-link device receives a second message sent by the first electronic device or the second electronic device, wherein the second message indicates whether a link is added successfully; If the second message indicates that the link is added successfully, the multi-link device receives a third message sent by the first electronic device or the second electronic device, or sends a third message to the first electronic device or the second electronic device, wherein the third message is used to indicate deletion of the link, and the deletion target indicated in the third message is the first electronic device; The multi-link device performs data communication with the second electronic device. The wireless roaming method according to claim 1, further comprising: The multi-link device acquires roaming information from the first electronic device, where the roaming information includes an identifier of a neighboring device and mobility management group information; The second electronic device is one of the neighboring devices indicated by the roaming information, and the first electronic device and the second electronic device belong to the same mobility management group. The wireless roaming method according to claim 2, wherein the multi-link device determines that the roaming target is the second electronic device comprises: The multi-link device receives an instruction to execute roaming sent by the first electronic device; The multi-link device determines that the roaming target is the second electronic device according to the identifier of the roaming target included in the indication, or the multi-link device measures the adjacent devices indicated in the roaming information and belonging to the same mobility management group as the first electronic device, and determines that the roaming target is the second electronic device according to the measurement result. The wireless roaming method according to claim 2, wherein the multi-link device determines that the roaming target is the second electronic device comprises: The multi-link device measures the first electronic device; If the signal strength of the first electronic device meets the preset condition, the multi-link device measures the neighboring devices indicated in the roaming information and belonging to the same mobility management group as the first electronic device, and determines the roaming target as the second electronic device according to the measurement result. A wireless roaming method according to claim 1, characterized in that the third message also indicates the remaining time for deleting the link, and the method further comprises: The multi-link device disconnects from the first electronic device according to the remaining duration of the deleted link. A wireless roaming method, comprising: The first electronic device receives a first message sent by the multi-link device, where the first message is used to request a new link, and the first message indicates that the link target is a second electronic device, wherein the first electronic device and the second electronic device are non-co-located physical devices; The first electronic device sends a fourth message to the second electronic device, where the fourth message includes information about the multi-link device and is used to indicate that the multi-link device requests to add a new link with the second electronic device; Also includes any one or more of the following: The first electronic device receives a third message sent by the multi-link device or sends a third message to the multi-link device, wherein the third message is used to indicate deletion of a link, and the deletion target indicated in the third message is the first electronic device; The first electronic device receives a fifth message sent by the second electronic device, where the fifth message is used to indicate that the roaming is completed. The wireless roaming method according to claim 6, further comprising: The first electronic device sends roaming information, where the roaming information includes an identifier of a neighboring device and mobility management group information; The second electronic device is one of the neighboring devices indicated by the roaming information, and the first electronic device and the second electronic device belong to the same mobility management group. The wireless roaming method according to claim 6, further comprising: The first electronic device receives a sixth message sent by the second electronic device, where the sixth message is used to confirm the newly added link; The first electronic device sends a second message to the multi-link device, where the second message indicates whether the link is added successfully. The wireless roaming method according to claim 6, further comprising: The first electronic device sends a trigger message, the trigger message includes data sending information, and instructs the second electronic device to send data to the multi-link device according to the data sending information, and instructs the multi-link device to receive downlink data, wherein the data sending information is used to calculate the end time of the data packet; The first electronic device sends data to the multi-link device. A wireless roaming method, comprising: The second electronic device receives a fourth message sent by the first electronic device, or receives a first message sent by the multi-link device, wherein the fourth message includes information of the multi-link device, and is used to indicate that the multi-link device requests to add a new link with the second electronic device; the first message is used to request to add a new link, and the link target indicated in the first message is the second electronic device, wherein the first electronic device and the second electronic device are non-co-located physical devices; Also includes any one or more of the following: The second electronic device sends a second message to the multi-link device, where the second message indicates whether the link is added successfully; The second electronic device sends a fifth message to the first electronic device, where the fifth message is used to indicate that the roaming is completed; The second electronic device sends a sixth message to the first electronic device, where the sixth message is used to indicate confirmation of the newly added link. The wireless roaming method according to claim 10, further comprising: The second electronic device receives a third message sent by the multi-link device or sends a third message to the multi-link device, wherein the third message is used to instruct to delete a link, and the deletion target indicated in the third message is the first electronic device. The wireless roaming method according to claim 10, further comprising: The second electronic device receives a trigger message sent by the first electronic device, wherein the trigger message includes data sending information, and instructs the second electronic device to jointly send data to the multi-link device according to the data sending information, and instructs the multi-link device to receive downlink data, wherein the data sending information is used to calculate the time when the data packet ends; The second electronic device obtains the time when the data packet sent by the first electronic device to the multi-link device ends according to the data sending information; The second electronic device sends data to the multi-link device according to the acquired time when the data packet sent by the first electronic device to the multi-link device ends, so that the data packets sent by the second electronic device and the first electronic device to the multi-link device end at the same time. A wireless roaming device, characterized in that it comprises a wireless roaming module, wherein the wireless roaming module is used to perform the following steps: Determining, by the multi-link device, that the roaming target is the second electronic device; Sending a first message to a first electronic device or a second electronic device through a multi-link device, wherein the first message is used to request a new link, and the first message indicates that the link target is the second electronic device, wherein the first electronic device and the second electronic device are non-co-located physical devices; receiving, by the multi-link device, a second message sent by the first electronic device or the second electronic device, wherein the second message indicates whether a link is added successfully; If the second message indicates that the link is added successfully, receiving a third message sent by the first electronic device or the second electronic device through the multi-link device, or sending a third message to the first electronic device or the second electronic device, wherein the third message is used to indicate deletion of the link, and the deletion target indicated in the third message is the first electronic device; Data communication is performed with the second electronic device through the multi-link device. A wireless roaming device, characterized in that it comprises a wireless roaming module, wherein the wireless roaming module is used to perform the following steps: Receiving, by a first electronic device, a first message sent by a multi-link device, wherein the first message is used to request a new link, and the first message indicates that the link target is a second electronic device, wherein the first electronic device and the second electronic device are non-co-located physical devices; Sending a fourth message to the second electronic device through the first electronic device, wherein the fourth message includes information about the multi-link device and is used to indicate that the multi-link device requests to add a new link with the second electronic device; The wireless roaming module is further configured to perform any one or more of the following: Receiving a third message sent by the multi-link device through the first electronic device or sending a third message to the multi-link device, wherein the third message is used to indicate deletion of the link, and the deletion target indicated in the third message is the first electronic device; A fifth message sent by the second electronic device is received by the first electronic device, where the fifth message is used to indicate that the roaming is completed. A wireless roaming device, characterized in that it comprises a wireless roaming module, wherein the wireless roaming module is used to perform the following steps: Receiving, by the second electronic device, a fourth message sent by the first electronic device, or receiving a first message sent by the multi-link device, wherein the fourth message includes information about the multi-link device and is used to indicate that the multi-link device requests to add a link with the second electronic device; the first message is used to request to add a link, and the link target indicated in the first message is the second electronic device, wherein the first electronic device and the second electronic device are non-co-located physical devices; The wireless roaming module is further configured to perform any one or more of the following: Sending a second message to the multi-link device through a second electronic device, wherein the second message indicates whether a link is added successfully; Sending a fifth message to the first electronic device through the second electronic device, where the fifth message is used to indicate that the roaming is completed; A sixth message is sent to the first electronic device through the second electronic device, where the sixth message is used to indicate confirmation of the newly added link.