CN113099503A

CN113099503A - Roaming switching method in multi-set wireless mesh network

Info

Publication number: CN113099503A
Application number: CN202110312768.2A
Authority: CN
Inventors: 邓宇; 刘继明; 金宁; 陈浮; 黄星星
Original assignee: ITIBIA TECHNOLOGIES (SUZHOU) CO LTD
Current assignee: ITIBIA TECHNOLOGIES (SUZHOU) CO LTD
Priority date: 2021-03-24
Filing date: 2021-03-24
Publication date: 2021-07-09
Anticipated expiration: 2041-03-24
Also published as: CN113099503B

Abstract

The invention relates to a method for roaming switching in a multi-set wireless mesh network, which comprises the steps that firstly, a master device of each single set of mesh registers to a management server, and an interaction channel is established with the server; then each single set of mesh master device reports the user information accessed in the mesh network to the server at regular time; the server analyzes the signal condition of each current terminal and issues a terminal signal to be monitored to other mesh equipment according to the signal condition; other mesh devices report the signals of the terminal to the server after monitoring the signals of the terminal; and finally, the server switches or keeps the terminal connection according to the connected signal and the signal monitored by other wifi equipment. The method realizes active roaming, time strategy, access strategy and the like of users in multiple sets of mesh; the method realizes the fast switching roaming of users in a plurality of sets of mesh networks and processes the condition that some users are always connected to equipment with poor signals; and integrating a plurality of sets of wireless mesh networks.

Description

Roaming switching method in multi-set wireless mesh network

Technical Field

The invention relates to a roaming switching method in a plurality of sets of wireless mesh networks, belonging to the technical field of wireless local area network operation management.

Background

The wireless Mesh network is a new wireless local area network type, and different from the traditional WLAN, the APs in the wireless Mesh network can be interconnected in a wireless connection mode, and a multi-hop wireless link can be established between the APs.

In a conventional Wireless Local Area Network (WLAN), each client accesses the network through a wireless link connected to an AP, forming a local BSS. If users are to communicate with each other, they must first access a fixed Access Point (AP), and this network architecture is called a single hop network.

In the wireless Mesh network, any wireless device node can simultaneously serve as an AP and a router, each node in the network can send and receive signals, and each node can directly communicate with one or more peer nodes.

The greatest benefit of this structure is: if the nearest AP is congested due to excessive traffic, the data may be automatically rerouted to a neighboring node with a smaller traffic volume for transmission. And so on, the data packet can be further routed to the next node closest to the data packet for transmission according to the situation of the network until the final destination is reached. Such an access method is a multi-hop access.

However, currently, the mainstream wireless mesh network has several layout and use problems, such as:

firstly, the method comprises the following steps: the hop count of the mesh network is limited, and basically, once per hop, the bandwidth of the mesh network is reduced by about half, so that the half of the network hop count cannot exceed 2 hops.

Secondly, the method comprises the following steps: the mesh network ad hoc network has strict regulations, a small local area network is arranged in the mesh network ad hoc network and is communicated with the internet through a main gateway, the number of devices of the mesh network ad hoc network is limited due to the limited hop count of the network, and if the mesh network ad hoc network is a large network, a plurality of mesh networks are often required to be networked, so that different mesh networks cannot roam mutually.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a roaming switching method in a plurality of sets of wireless mesh networks.

The purpose of the invention is realized by the following technical scheme:

a roaming switching method in a plurality of sets of wireless mesh networks is characterized in that: the method comprises the following steps:

1) registering each single set of mesh master equipment to a management server, and establishing an interaction channel with the server;

2) each single set of mesh master equipment reports user information accessed in the mesh network to a server at regular time;

3) the server analyzes the signal condition of each current terminal and issues a terminal signal to be monitored to other mesh equipment according to the signal condition;

4) other mesh devices report the signals of the terminal to the server after monitoring the signals of the terminal;

5) and the server switches or keeps the terminal connection according to the connected signal and the signal monitored by other wifi equipment.

Further, in the method for roaming handover in multiple sets of wireless mesh networks, in step 1), a single set of mesh networks which can only operate independently is registered in the management server, an interaction channel is established with the server, UDP encapsulation is considered for the interaction message, and a private protocol is adopted.

Further, in the above method for roaming handover in multiple sets of wireless mesh networks, the private protocol makes requirements and specifications for access, and the format is as follows:

version: a private protocol version number;

manufacturer identification code: data used for identifying the device is encrypted;

the following are the message contents in TLV format:

the field type: indicating a type of content;

length: the net length of the content of the message;

the content is as follows: the message content that the private protocol needs to use.

Further, in the method for roaming handover in multiple sets of wireless mesh networks, in step 2), the user information includes the mac of the user and the signal strength information.

Further, in the method for roaming handover in multiple sets of wireless mesh networks, in step 2), a reporting interval is set as required, and the shorter the interval time is, the more sensitive the roaming response is;

the content reported by each master device is defined according to the requirement, not only the MAC and the signal strength of the user are reported, but also the device type, the frequency band and the geographical position information are reported, and more data are provided for the server to calculate the roaming switching.

Further, in the method for roaming handover in multiple sets of wireless mesh networks, step 3), the server issues a command for monitoring signals to other mesh networks for a terminal with poor signals according to the geographical condition and roaming sensitivity;

since monitoring and collecting terminal signals consume the performance of the mesh device, monitoring time and frequency need to be considered.

Further, in the method for roaming handover in multiple sets of wireless mesh networks, in step 4), the monitoring of the terminal is turned off after the report or after a period of time of the report, so as to save mesh resources.

Compared with the prior art, the invention has obvious advantages and beneficial effects, and is embodied in the following aspects:

the invention provides a roaming method in a plurality of sets of wireless mesh networks, which can realize active roaming, time strategies, access strategies and the like of users in a plurality of sets of mesh; the method realizes the fast switching roaming of users in a plurality of sets of mesh networks and processes the condition that some users are always connected to equipment with poor signals; therefore, multiple sets of wireless mesh networks are integrated, and convenience is provided for network management.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description.

Drawings

FIG. 1: the flow chart of the invention is schematic;

FIG. 2: a flow diagram of roaming decision.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, specific embodiments will now be described in detail.

As shown in fig. 1, the present invention provides a roaming handover method in multiple sets of wireless mesh networks, which comprises the following specific steps:

step 1), registering a single set of mesh network which can only operate independently in a management server, establishing an interactive channel with the server, recommending an interactive message to use UDP for encapsulation, adopting a private protocol, recommending the private protocol to make certain requirements and specifications for access, and having the following format:

version: a private protocol version number;

manufacturer identification code: to identify the device, typically the data after encryption;

the following are the message contents in TLV format:

the field type: indicating a type of content;

length: the net length of the content of the message;

the content is as follows: the message content required to be used by the private protocol;

step 2), each single set of mesh master equipment reports the user information accessed in the mesh network at present to a server at regular time, wherein the user information comprises but is not limited to user mac, signal intensity information and the like;

under normal conditions, the reporting interval is set as required, and the shorter the interval time is, the more sensitive the roaming response is, but larger network burden is caused;

the content reported by each master device can be defined as required, not only the MAC and signal strength of the user are reported, but also the device type, frequency band, geographical location information and the like can be reported, and more data are provided for the server to calculate roaming switching;

step 3), the server analyzes the signal condition of each current terminal and issues a terminal signal to be monitored to other mesh equipment according to the signal condition;

the server transmits a command for monitoring signals to other mesh networks for the terminal with poor signals according to the geographical condition and the roaming sensitivity;

monitoring and collecting terminal signals can consume the performance of some mesh devices, and the monitoring time and frequency need to be considered;

description of the algorithm:

roaming domain: refers to a set of mesh collections of all possible roaming situations, such as a building, an activity center, and is generally divided into geographical areas. Examples are: a company has 3 office buildings, A, B and C have certain geographical intervals, and roaming situations can only occur in the building, namely all equipment of A is a roaming domain;

meanwhile, the roaming is based on the same SSID, that is, the SSID of the same roaming domain needs to be the same;

the reason for introducing the roaming domain is that the calculation amount of the optimal roaming mesh can be greatly reduced, and unnecessary data interference is eliminated;

the roaming domain uses the MAC of the main gateway as the basis for manual configuration, and the terminal information in the same roaming domain is used as the condition for judging whether roaming is switched or not;

and (3) roaming decision: in general, a terminal roams in a mesh range, a master device can make a decision, and when the master gateway finds that the terminal does not have RSSI > -65db in the mesh range, namely no good device can be accessed, a request decision message is sent, and the message carries the MAC of the terminal;

the server receives the decision message, and for whether roaming is needed, in the same roaming domain, roaming basically depends on signal strength, so that the following two values are defined:

roaming threshold R: the RSSI < -65db corresponding to the current terminal and the associated AP is indicated;

roaming handover threshold Δ R: the difference value between the RSSI corresponding to the terminal and the associated AP and the RSSI of the terminal and other APs is more than 10 db;

when the two conditions (configurable) are simultaneously met, namely the currently connected AP is not good and has a better AP, the SSID is the same, and the roaming domain is the same, a suggested roaming strategy is sent to the connected AP; as shown in fig. 2;

step 4), other mesh devices report the signals of the terminal to the server after monitoring the signals of the terminal;

according to the actual situation, the monitoring action on the terminal is closed after the report or after a period of time of the report, so as to save the mesh resource;

and 5), the server performs the action of switching or keeping the connection of the terminal according to the connected signal and the signals monitored by other wifi equipment.

In summary, the present invention provides a roaming method in multiple sets of wireless mesh networks, which can realize active roaming, time policy, access policy, etc. for users in multiple sets of mesh; the method realizes the fast switching roaming of users in a plurality of sets of mesh networks and processes the condition that some users are always connected to equipment with poor signals; therefore, multiple sets of wireless mesh networks are integrated, and convenience is provided for network management.

It should be noted that: the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention; while the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims

1. A roaming switching method in a plurality of sets of wireless mesh networks is characterized in that: the method comprises the following steps:

2. The method of roaming handover in multi-suite wireless mesh network as claimed in claim 1, wherein: step 1), registering a single set of mesh network which can only operate independently into a management server, establishing an interactive channel with the server, considering UDP encapsulation and adopting a private protocol for interactive messages.

3. The method of roaming handover in multi-suite wireless mesh network as claimed in claim 2, wherein: the proprietary protocol makes requirements and specifications for access in the following format:

version: a private protocol version number;

the following are the message contents in TLV format:

the field type: indicating a type of content;

length: the net length of the content of the message;

4. The method of roaming handover in multi-suite wireless mesh network as claimed in claim 1, wherein: and step 2), the user information comprises user mac and signal intensity information.

5. The method of roaming handover in multi-suite wireless mesh network as claimed in claim 1, wherein: step 2), setting a reporting interval as required, wherein the shorter the interval time is, the more sensitive the roaming response is;

6. The method of roaming handover in multi-suite wireless mesh network as claimed in claim 1, wherein: and step 3), the server transmits a command for monitoring signals to other mesh networks for the terminal with poor signals according to the geographic condition and the roaming sensitivity.

7. The method of roaming handover in multi-suite wireless mesh network as claimed in claim 1, wherein: and 4), closing the monitoring of the terminal after the report.