CN117241328A

CN117241328A - Easymesh switching method

Info

Publication number: CN117241328A
Application number: CN202311515526.9A
Authority: CN
Inventors: 刘锐锋; 张欣然; 周旭成; 钱良; 蔡信浩
Original assignee: Sichuan Research Institute Of Shanghai Jiaotong University; Sichuan Changhong Xinwang Technology Co ltd; Shanghai Jiaotong University
Current assignee: Sichuan Research Institute Of Shanghai Jiaotong University; Sichuan Changhong Xinwang Technology Co ltd; Shanghai Jiaotong University
Priority date: 2023-11-15
Filing date: 2023-11-15
Publication date: 2023-12-15
Anticipated expiration: 2043-11-15
Also published as: CN117241328B

Abstract

The application relates to the field of wireless communication, and provides an easy mesh switching method for improving WiFi switching efficiency, which comprises the following steps: 1. acquiring terminal information of different sub-routes when the terminal moves in the easy mesh network, and acquiring a switching rule based on the sub-routes and the terminal information; 2. after the new terminal is accessed to the easy mesh network, obtaining terminal information when the new terminal moves; 3. and predicting a switching process based on the terminal information of the new terminal and a switching rule, and notifying the pre-switching sub-route to prepare corresponding resources. By predicting the switching process, the corresponding pre-switching sub-route preparation corresponding resources can be informed in advance, so that the switching time is reduced, and the switching efficiency is improved.

Description

Easymesh switching method

Technical Field

The application relates to the field of wireless communication, in particular to an easy mesh switching method.

Background

In an application scene, the situation that a terminal moves and gradually moves away from an AP node connected with the terminal and network connection needs to be switched often occurs, so that how to realize seamless switching of network connection and minimize the blocking in the switching process so as to improve user experience is also one of important points of research.

In the conventional WiFi switching process, a corresponding specific switching algorithm is started based on a certain static criterion, for example, based on a preset error rate higher than a preset threshold. In contrast to the principle of switching between the cellular communication signaling channel and the traffic channel, since cellular communication uses a frame structure involving multiple resources such as frequency domain/code domain/space domain, it is possible to detect various wireless communication resources to be switched by using different logic channels such as frequency domain/code domain immediately before switching, thereby providing a pre-estimation and making the switching smoother. However, for the reason of historical development, the air interface (air interface) protocol of the link layer of the WiFi network can only provide a time domain mechanism, and the signaling channel and the traffic channel use a unified time domain physical channel, so that real-time communication resource detection cannot be performed like cellular communication, thereby causing serious handover delay.

Disclosure of Invention

In order to improve WiFi switching efficiency, the application provides an easy mesh switching method.

The application solves the problems by adopting the following technical scheme:

the easy mesh switching method comprises the following steps:

step 1, acquiring terminal information of different sub-routes when a terminal moves in an easy mesh network, and acquiring a switching rule based on the sub-routes and the terminal information;

step 2, after the new terminal is accessed to the easy mesh network, obtaining terminal information when the new terminal moves;

and 3, predicting a switching process based on the terminal information of the new terminal and a switching rule, and informing the pre-switching sub-route to prepare corresponding resources.

Further, the terminal information is an electromagnetic wave propagation distance and a corresponding received signal strength.

Further, the step 1 specifically includes:

step 11, the controller records the propagation distance of the terminal from the electromagnetic wave of the sub-route connected with the terminal and the corresponding received signal strength;

step 12, marking coordinate points based on different sub-routes by taking the propagation distance of electromagnetic waves and the strength of received signals as coordinate axes;

and step 13, fitting coordinate points based on the easy mesh network topology information and the terminal moving process to acquire a switching rule.

Further, the step 13 specifically includes: fitting coordinate points based on the Easymesh network topology information and the moving processes of a plurality of terminals to obtain a switching rule.

Further, the step 2 specifically includes:

step 21, after a new terminal is accessed to an easy mesh network, acquiring the electromagnetic wave propagation distance between the new terminal and a sub-route connected with the new terminal and the corresponding received signal strength;

and 22, establishing the same coordinate axis as the coordinate axis in the step 12 and marking coordinate points to acquire a motion law curve.

Further, the step 3 specifically includes:

step 31, obtaining the similarity between the motion rule curve and each rule curve of the corresponding sub-route, and if the highest similarity is lower than a threshold value, keeping the terminal connected; if the highest similarity is higher than the threshold value, taking a switching process corresponding to a rule curve of the highest similarity as a predictive switching process, and informing a corresponding pre-switching sub-route to prepare corresponding resources.

Further, step 4 is included, and when the network structure is reconstructed, the switching rule is reacquired.

Compared with the prior art, the application has the following beneficial effects: the application introduces a service pre-estimation mechanism, wherein the pre-estimation mechanism is used for collecting a dynamic time window of a detection level threshold corresponding to static time sequence analysis, and predicting based on sequence processing instead of a static single detection level threshold. Therefore, in the WiFi coverage environment which can only provide a time domain mechanism, not only can the static switching detection level be based, but also the probability of possible switching events in a longer dynamic time window can be counted, and the pre-switching preparation work is carried out, so that the measurement preparation time of the corresponding terminal switching is greatly reduced.

Drawings

Fig. 1 is a flowchart of an easylmesh switching method;

fig. 2 is a flowchart of an easy mesh switching method according to an embodiment.

Detailed Description

The present application will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

In the easy mesh protocol formulated by Wi-Fi alliance, the network comprises a multi-AP controller and a plurality of multi-AP agents, and the connection condition of the terminal on the AP can be obtained through the multi-AP controller, including information such as which AP node the terminal is connected to, electromagnetic wave distance between the terminal and the AP, RSSI (received signal) strength, and the like. Based on this, as shown in fig. 1, the present application provides an easylmesh switching method, including:

An embodiment, as shown in fig. 2, of the easy mesh switching method includes:

step 1, a controller collects terminal information of different sub-routes when a terminal moves in an easy mesh network, and obtains a switching rule based on the sub-routes and the terminal information; in this embodiment, the terminal information uses electromagnetic wave distance and RSSI strength information, and the RSSI strength uses average signal amplitude within a statistical time window.

The method comprises the following steps: the controller records the propagation distance of the terminal from the electromagnetic wave of the sub-route connected with the terminal and the corresponding received signal strength; drawing coordinate axes by taking the propagation distance of electromagnetic waves as a horizontal axis and the intensity of received signals as a vertical axis, and marking coordinate points; the different sub-routes are mapped separately. In order to avoid inaccurate information acquired by a single terminal, after coordinate points are acquired by a plurality of terminals, fitting the coordinate points to form a switching rule curve. In this embodiment, a least square method is used for curve fitting. For example, the switching process of the terminal between the three sub-routes of A, B, C is A-B, A-C, B-C, two rule curves of A-B, A-C are fitted on the graph corresponding to A, and a rule curve of B-C is fitted on the graph corresponding to B.

Step 2, after the new terminal is accessed to the easy mesh network, obtaining terminal information when the new terminal moves; the method comprises the following steps: after a new terminal is accessed into an easy mesh network, acquiring the propagation distance of electromagnetic waves from the new terminal to a sub-route connected with the new terminal and the corresponding received signal strength; and establishing the same coordinate axis as the coordinate axis in the step 12 and marking coordinate points to acquire a motion rule curve.

And 3, predicting a switching process based on the terminal information of the new terminal and a switching rule, and informing the pre-switching sub-route to prepare corresponding resources. The similarity between curves is adopted for comparison in the embodiment, and the method specifically comprises the following steps: obtaining the similarity between the motion rule curve and each rule curve of the corresponding sub-route, and if the highest similarity is lower than a threshold value, keeping the terminal connected; if the highest similarity is higher than the threshold value, taking a switching process corresponding to a rule curve of the highest similarity as a predictive switching process, and informing a corresponding pre-switching sub-route to prepare corresponding resources. And if the similarity between the motion rule curve of the new terminal on the A and the A-B rule curve is highest and is higher than the threshold value, taking the A-B as a predictive switching process, and informing the B of preparing corresponding resources.

In the comparison, the propagation distance of the electromagnetic wave of the sub-route connected with the terminal is consistent. If the distance corresponding to the coordinate point on the rule curve is 2m, the acquisition distance corresponding to the new terminal should also be 2m.

Further, step 4 is included, and when the network structure is reconstructed, the switching rule is reacquired. The reconstruction includes sub-route death and sub-route active reconstruction.

By predicting the switching process, the corresponding pre-switching sub-route preparation corresponding resources can be informed in advance, so that the switching time is reduced, and the switching efficiency is improved.

Claims

An easymesh switching method, characterized by comprising:

step 1, acquiring terminal information of different sub-routes when a terminal moves in an easy mesh network, and acquiring a switching rule based on the sub-routes and the terminal information;

step 2, after the new terminal is accessed to the easy mesh network, obtaining terminal information when the new terminal moves;

and 3, predicting a switching process based on the terminal information of the new terminal and a switching rule, and informing the pre-switching sub-route to prepare corresponding resources.
2. The easy mesh switching method according to claim 1, wherein the terminal information is an electromagnetic wave propagation distance and a corresponding received signal strength.
3. The easylmesh switching method according to claim 2, wherein the step 1 specifically comprises:

step 11, the controller records the propagation distance of the terminal from the electromagnetic wave of the sub-route connected with the terminal and the corresponding received signal strength;

step 12, marking coordinate points based on different sub-routes by taking the propagation distance of electromagnetic waves and the strength of received signals as coordinate axes;

and step 13, fitting coordinate points based on the easy mesh network topology information and the terminal moving process to acquire a switching rule.
4. The easylmesh switching method according to claim 3, wherein the step 13 is specifically: fitting coordinate points based on the Easymesh network topology information and the moving processes of a plurality of terminals to obtain a switching rule.
5. The easylmesh switching method as claimed in claim 3, wherein the step 2 specifically comprises:

step 21, after a new terminal is accessed to an easy mesh network, acquiring the electromagnetic wave propagation distance between the new terminal and a sub-route connected with the new terminal and the corresponding received signal strength;

and 22, establishing the same coordinate axis as the coordinate axis in the step 12 and marking coordinate points to acquire a motion law curve.
6. The easylmesh switching method according to claim 5, wherein the step 3 is specifically:

step 31, obtaining the similarity between the motion rule curve and each rule curve of the corresponding sub-route, and if the highest similarity is lower than a threshold value, keeping the terminal connected; if the highest similarity is higher than the threshold value, taking a switching process corresponding to a rule curve of the highest similarity as a predictive switching process, and informing a corresponding pre-switching sub-route to prepare corresponding resources.
7. The easy mesh switching method according to any one of claims 1-6, further comprising step 4, reacquiring a switching law when a reconfiguration of the network structure occurs.