Method, device and system for high-speed switching of terminals between APs in WLAN network

Abstract

The invention discloses a method, device and system for inter-AP high-speed switching of a terminal in a WLAN network, and belongs to the field of wireless communication. The method comprises the following steps: acquiring information about a connectable AP; just performing authentication and establishing association with the connectable AP; and when the signal strength of a communicating AP is smaller than a roaming switching threshold value, switching a communicating link to a link of the associated AP. Through adoption of the method, the device and the system, a switching preparation action is added in the process of communication with the APs, that is, after the connectable AP is found, association with the connectable AP is established in advance, so that once the signal strength of the communicating AP is insufficient to guarantee normal data communication, the communicating link is switched to the link of the associated AP. Compared with the prior art, the method, the device and the system provided by the invention have the advantages of being low in cost and high in switching speed.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method, device and system for high-speed switching of terminals between APs in a WLAN network. Background technique [0002] In the WLAN network protocol, there are two basic network types, an independent WLAN network and an infrastructure WLAN network. Among them, in an independent WLAN network, such as figure 1 As shown (1 in the figure is AP), the Stations (can be of various types) within the communication range can communicate directly, and the data packets do not need to be centrally managed and forwarded by a central node. This network type belongs to the ad hoc network Category, used for small-scale temporary communication; in infrastructure WLAN networks, such as figure 2 As shown (1 in the figure is the AP, 2 is the switch), there is a central access point responsible for all communications in the network, if a station needs to communicate with other st...

AI Technical Summary

Problems solved by technology

However, most of the APs currently on the market do not implement the 802.11r protocol, resulting in high deployment costs

At the same time, 802.11r is not suitable for the situation where the communication between the Station and the original associated AP suddenly deteriorates. However, during high-speed movement, such rapid changes in the channel environment often occur due to reasons such as building occlusions.

The 802.11r protocol only provides a more efficient method for key update during the handover process, but its hard handover method has not changed

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