A wireless roaming method and an access controller

An access controller and wireless technology, applied in wireless communication, network data management, security devices, etc., can solve the problems of large message exchange key storage table items, inability to realize fast roaming across network segments, and affecting the performance of AC equipment , to achieve the effects of shielding limitations, reducing scale, and reducing workload

Active Publication Date: 2014-02-19
NEW H3C TECH CO LTD
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Problems solved by technology

[0005] Using the above existing technology, only one roaming group can be configured on the AC, and ACs outside the group cannot participate in roaming; and each roaming group can have a maximum of 8 roaming members, that is, roaming between 8 ACs, and more Roaming within an AC; roaming groups must be manually configured, which is cumbersome; when using key caching to achieve fast roaming, all ACs in the roamin

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  • A wireless roaming method and an access controller
  • A wireless roaming method and an access controller
  • A wireless roaming method and an access controller

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[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below through specific embodiments and with reference to the accompanying drawings.

[0029] In this application, all ACs are added to the corresponding parallel roaming groups as required, and the roaming between ACs in each roaming group uses the Key Cache (key cache) method, and EAP is enabled for roaming between ACs between parallel roaming groups Re-authentication process. It can be realized that all ACs can participate in the roaming behavior of the mobile terminal, and there is no excessive message interaction and does not occupy too many system resources.

[0030] like figure 2 As shown, all wireless controller ACs will be added to n roaming groups SystemGroup_par_xx respectively. The number of member ACs in each roaming group can be configured according to needs, there is no fixed number, and no more than 3 ar...

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Abstract

The application discloses a wireless roaming method comprising that all access controllers ACs participating in wireless client STA roaming are distributed in different parallel roaming groups; that the ACs in a same roaming group are all equipped with roaming group information containing the name of the roaming group; that each AC notifies the STA accessed to the AC of the roaming group information; that any above AC receives a authentication or re-associate message carrying the roaming group information from the STA when a roaming occurs; that the AC starts an expand authentication protocol EAP authentication flow when determining the STA is in an intergroup roaming according to the configured roaming group information and the received authentication or re-associate message; and that the AC uses a key cache manner if determining the STA is in-group roaming. The application also discloses an access controller AC. The wireless roaming method may achieve fast roaming among any multiple ACs and fast roaming spanning network segments, and may enhance the performance of the AC device.

Description

technical field [0001] The present application relates to roaming technology of wireless local area network, in particular to a wireless roaming method and an access controller. Background technique [0002] Roaming is a key technology of the wireless local area network (WLAN), and an important basis for realizing the mobility of wireless terminals. At present, the mainstream way of WLAN networking is the access controller (AC) + thin AP (FIP AP) networking model. Under this networking condition, how to realize the seamless roaming of wireless clients (STA), especially how to realize Roaming of STAs between different ACs is an important indicator for measuring the performance of wireless devices. [0003] At present, key cache (Key Cache) is mainly used to implement STA roaming among different ACs, such as figure 1 As shown, all ACs that may participate in the roaming of the mobile terminal form a roaming group. The establishment and maintenance of the roaming group are co...

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Application Information

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IPC IPC(8): H04W8/02H04W12/06H04W88/12
CPCH04W12/06H04L63/162H04W12/043H04W8/02
Inventor 聂树伟
Owner NEW H3C TECH CO LTD
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