Virtual fast switching method for wireless Mesh network based on dynamic cluster

Abstract

The invention discloses a virtual fast switching algorithm for a wireless Mesh network based on a dynamic cluster. The algorithm comprises a Mesh client and a Mesh node. The Mesh client comprises an access module and a data packet module; the access module transmits an access request and updates an MAC address of a default gateway; and the data packet module generates a data packet. The Mesh nodes comprises a dynamic cluster maintenance module, a data multicast group maintenance module, and a data packet routing module; the dynamic cluster maintenance module responds to the access request of the client, constructs a dynamic Mesh access point cluster and exchanges link quality information with the client; the data multicast group maintenance module forwards the data packet for the client; and the data packet routing module establishes a multicast routing. In a movement process of the Mesh client in a wireless Mesh network environment, the Mesh network comprehensively considers the access link quality and the backhaul routing situation by constructing the dynamic cluster, so as to select an optimal access point for the client and realize fast switch of the client. The algorithm can accomplish the fast switch of the mobile Mesh client without modifying a 802.11 device drive.

Description

technical field [0001] The invention belongs to the field of wireless Mesh network virtualization, and relates to a method for quickly switching a Mesh access point in a scene where a Mesh client moves. Background technique [0002] The Mesh client of the wireless Mesh network needs to establish an association with the Mesh access point to access the Internet. The selection of the access point not only affects the throughput rate and end-to-end delay of the client, but also affects the performance of the entire Mesh network. . The IEEE802.11 standard access device scans the MAP with the strongest Received Signal Strength Indicator (RSSI) as the most access point, and re-scans the channel when the RSSI drops to a certain threshold, ignoring the load of the access point and the entire Mesh The routing status of the network results in the selected access point not being optimal. At this time, all scanned access points can be constructed into a dynamic cluster, and the entire ...

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Problems solved by technology

The IEEE802.11 standard access device scans the MAP with the strongest Received Signal Strength Indicator (RSSI) as the most access point, and re-scans the channel when the RSSI drops to a certain threshold, ignoring the load of the access point and the entire Mesh The routing status of the network results in the selected access point not being optimal

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