Method for realizing STA cross-domain roaming through cloud AC

Abstract

The invention provides a method for realizing STA cross-domain roaming through a cloud AC. The method comprises the steps that an AP uses a private protocol to keep communication with the cloud AC through TCP long connection, and the MAC address of an STA accessed to the AP is transmitted to the cloud AC according to a defined message format; the cloud AC receives the message transmitted by the AP, and the message is analyzed and then the MAC address of the STA is saved in a cloud AC roaming table; and when the AP receives an STA authentication request, the MAC address of the STA is transmitted to the cloud AC to perform roaming judgment, if the cloud AC inquires the roaming table and then determines that the MAC address of the STA is authenticated and in the period of validity, the cloud AC responds an STA access authentication roaming success message to the AP, and the AP enables the STA connected with the AP to be successfully authenticated and accessed to the network and thus roaming is completed. The problem of STA cross-domain roaming can be effectively realized at low cost without dependence on a hardware AC so that deployment and operation are facilitated.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method for realizing cross-domain roaming of STAs when switching between APs through a cloud AC. Background technique [0002] With the expansion of the wireless network scale, especially the need for cross-regional and cross-segment networking, traditional wireless LANs have limitations and cannot meet the ever-expanding needs of users. Moreover, as virtualization technology and cloud computing technology become more and more mature, mainstream communication equipment manufacturers and communication operators begin to study the reconstruction of traditional network service functions and deploy them on the cloud. An AC (Access Controller, access controller) is deployed on the cloud, referred to as cloud AC for short. Roaming is a key technology in WLAN (Wireless LAN, wireless local area network) deployment. When a STA (station, wireless terminal) switche...

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Problems solved by technology

[0004] The above STA roaming implementation methods need to be connected directly to the network, or need to configure and maintain IAPP tunnels between APs. Generally speaking, the implementation is more complicated, which increases maintenance costs and equipment overhead, and there are situations where roaming across network segments cannot be performed. , and it is not convenient to remotely manage a large number of APs

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