Terminal Roaming Method and AP in AP Independent Mode

Abstract

The embodiment of the invention provides an STA (Station) roaming method in an independent AP (Access Point) mode and an AP. The method comprises the following steps: receiving a re-associated message sent from an STA by a first AP; inquiring whether a roaming table item of the STA exists in a local roaming table item or not according to an MAC (Media Access Control) address of the STA in the re-associated message; if not, inquiring a locally stored equipment information table according to an OLD BSSID (Old Basic Service Set Identifier) field in the re-associated message so as to obtain a second AP corresponding to the OLD BSSID field, and sending a roaming request message to the second AP; and generating the roaming table item and an associated table item of the STA when a successful roaming confirmation message replied by the second AP is received. According to the terminal roaming method in the independent AP mode and the AP provided in the embodiment of the invention, when AC (Alternating Current) is abnormal, the AP works in the independent mode; therefore, roaming between the APs is realized; the roaming realization time is reduced; and the data connection reliability is improved.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a terminal (Station, STA) roaming method and an AP in a wireless access point (Access Point, AP) independent mode. Background technique [0002] A wireless local area network (Wireless Local Area Network, WLAN) includes two WLAN architectures, one is a fat AP architecture, and the other is a thin AP architecture. The fat AP architecture is a distributed structure with fat APs as the core. APs are managed one by one, and it is impossible to manage the overall network traffic, radio frequency and user allocation. Therefore, there are few market applications and cannot meet the needs of large-scale network coverage. The thin AP architecture is that the wireless controller (Access Controller, AC) centrally controls all subordinate APs through the wired network, and realizes the centralized planning and deployment of the wireless network. The AC completes the centralized ...

AI Technical Summary

Problems solved by technology

This technology is currently widely used in the general branch network where the AC is in the headquarters and the AP is in each branch. It solves the problem of network interruption caused by the possible instability of the link between the AC / AP due to the connection of the AC / AP across the WAN.

[0004] However, in the WLAN thin AP architecture, the roaming of STAs between APs is centrally controlled by the AC. Therefore, even if the RIPT technology is used, the AP can continue to forward data for the STA when the AC is abnormally disconnected.

However, if the STA moves between multiple APs, the STA cannot roam between APs because there is no centralized control of the AC.

Images