Method of STA roaming in WLAN network and device

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...

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

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