Link switching method, controller, access point (AP) and wireless communication system

Abstract

The embodiment of the invention relates to a link switching method, a controller, an access point (AP) and a wireless communication system. The link switching method specifically includes the following steps: receiving switching information of a first AP and switching information of a second AP; according to the switching information of the first AP and the switching information of the second AP, judging whether a first link of a terminal correlated to the first AP is to be switched to a second link of the terminal correlated to the second AP; sending switching request information to the first AP if determining to switch the first link to the second link, so that the first AP can execute the switching from the first link to the second link according to the switching request information; after the first link is switched to the second link, updating the locally-saved correlation information of the terminal and the first AP to the correlation information of the terminal and the second AP. Therefore, the invention achieves seamless switching in a single frequency network, and avoids modifications of the terminal configuration.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a link switching method, a controller, an access point and a wireless communication system. Background technique [0002] With the development of communication technologies, wireless fidelity (Wireless Fidelity, WIFI) technology has been widely used. WIFI is a medium-to-short distance access, usually within 100m, so to cover a large area, it is necessary to arrange more access points (Access point, AP). When the user moves freely within the coverage of the WIFI network, multiple APs need to cooperate to ensure a seamless access for the user. When the mobile terminal moves out of the coverage of an AP, it needs to Switch to another AP. If the switching cannot be completed, or the switching delay is too long, the session will be interrupted, so solving the switching delay is of great significance to the WIFI network. [0003] In the prior art, reassociation is generally u...

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Problems solved by technology

[0007] Embodiments of the present invention provide a link switching method, a controller, an access point, and a wireless communication system to solve the problem in the prior art that hard switching cannot achieve seamless connection, or the terminal needs to be modified. The access point control The device uses the handover information of the first access point associated with the terminal and the second access point to be associated with the terminal to realize seamless handover in the single frequency network without modifying the configuration of the terminal

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