Method of STA roaming in WLAN network and device

A network and control device technology, applied in the field of STA roaming, can solve problems such as excessive switching threshold, traffic drop, and signal strength not being updated in time, and achieve the effect of improving network performance

Active Publication Date: 2009-11-18
NEW H3C TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Since STAs discover new APs by periodically sending Probe or Beacon frames, in order to reduce the impact of scanning on application performance, STA scans for APs at a relatively long period. As a result, new APs cannot be discovered in time, or the signal strength of each AP cannot be obtained in time. renew
[0005] In actual use, it is found that the STAs of many manufacturers cannot switch to the appropriate AP in time when roaming, resulting in a decrease in traffic.
By comparing the signal strength of STAs between APs, the default handover threshold of the STA may not be settable, and the handover threshold is too large, resulting in very slow handover; to switch

Method used

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  • Method of STA roaming in WLAN network and device

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Embodiment Construction

[0039] The core idea of ​​the present invention is: the AP monitors the STA signal strength, and reports the STA signal strength and whether it is associated with itself to the AC (Access Controller, wireless access controller) or server, and the AC or server reports the STA signal strength according to each AP. , when it is determined that the STA should be handed over to a new AP but the STA is not handed over, the AP is notified to let the STA go offline, so that the STA can be handed over to the new AP.

[0040]The present invention provides a method for STA roaming in a WLAN network, which is applied to a system including STA, a control device and at least two access points AP. The present invention is applicable to Fit AP architecture and FAT AP architecture, and in the Fit AP architecture , the control device is AC, and AC can be side-mounted to BAS (Broadband Access Server) equipment or connected in series between AP and BAS equipment, AC is responsible for the manageme...

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Abstract

The invention discloses a method of an STA roaming in a WLAN network, comprising the following steps: the control equipment receives a report message sent by the AP, the report message carries the information whether the STA signal strength and the STA detected by the AP is related to the AP; the control equipment stores the entries with the STA signal strength and the STA related to the AP; in the preset period, the control equipment compares and obtains that the STA signal strength reported by other APs is higher than the AP signal strength currently related to the STA in the STA entry by afirst threshold, an off-line notice is sent to the AP currently related to the STA, so as to lead the AP currently related to disconnect with the STA, and lead the STA to relate to other APs again. The invention improves the network performance when the STA roams, is compatible with the original standard, and does not need the client side to make any modification.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for STA roaming in a WLAN network. Background technique [0002] WLAN (Wireless Local Access Network, wireless local area network) provides a wireless connection service of local area network. Because WLAN can provide high-speed wireless data access, it is one of the more popular technologies in the IT industry. It has been widely used in cities, public Site coverage, as well as various places such as enterprises, buildings, and families. [0003] WLAN provides ESS (Extended Service Set, Extended Service Set) service. Within the coverage of the same ESS, STA (STAtion, wireless client) can associate with different APs (AccessPoint, wireless access point) and obtain network services through WLAN. , and enable seamless roaming. Wherein, the same ESS is provided by multiple APs with the same SSID (Service Set Identifier, Service Set Identifier), a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/10H04W36/08H04W76/02H04W76/06H04W84/12H04W88/08H04W88/18
Inventor 张海涛徐国祥
Owner NEW H3C TECH CO LTD
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