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Accelerating discovery of access points in a wireless local area network

A technology of wireless area network and access point, which is applied in the field of wireless area network, and can solve problems such as the influence of user service quality and the inability to receive packets

Inactive Publication Date: 2007-08-15
INTERDIGITAL TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When it listens to other channels, the STA cannot receive packets from its connected AP, and its communication is interrupted. Such interruption can obviously adversely affect the user's quality of service

Method used

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  • Accelerating discovery of access points in a wireless local area network
  • Accelerating discovery of access points in a wireless local area network
  • Accelerating discovery of access points in a wireless local area network

Examples

Experimental program
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Embodiment

[0037] 1. A method for speeding up the discovery of access points (APs) in a wireless local area network. The steps include: transmitting an announcement packet by an AP through at least one channel, which is different from a channel on which the AP transmits beacon signals; receiving the announcement packet by a station (STA); and deciding whether to connect the STA to The transmitting AP.

[0038] 2. The method of embodiment 1, wherein the transmitting step comprises: determining whether a predetermined condition for transmitting an announcement packet has been met; and transmitting the announcement packet if the predetermined condition has been met.

[0039] 3. The method of embodiment 2, wherein the preset condition includes: determining whether there is a low load condition in the basic service set served by the AP.

[0040] 4. The method of embodiment 2, wherein the predetermined condition comprises: receiving an indication from a neighboring AP that a congestion condit...

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PUM

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Abstract

A method for accelerating discovery of access points (APs) in a wireless local area network begins by transmitting an advertisement packet by an AP via at least one channel other than a channel on which the AP transmits beacon signals. The advertisement packet is received by a station (STA), which then determines whether to associate to the transmitting AP. The advertisement packet can include reassociation information, such that the STA can associate to the AP based on the information in the advertisement packet, or timing information, such that the STA can tune to the AP and receive the AP's beacon without dwelling on the AP for an extended period of time.

Description

technical field [0001] The present invention relates to wireless area networks (WLANs), and more particularly, the present invention relates to a method for expediting the discovery of access points (APs) by a station (STA) in passive scanning mode. Background technique [0002] In an AP-based WLAN, a STA communicates with a specific AP located near the STA; the STA is said to be connected to the AP. Sometimes a STA needs or wants to change the AP connected to it. For example, the STA may move out of the area covered by the AP it was originally connected to (i.e. roaming) and will be in a rather poor signal state. The upsurge of competition in the Service Set (BSS) results in reduced capacity. [0003] In order for a STA to reconnect with a new AP, it must first discover possible APs in its neighborhood. One way to perform this search is passive scanning mode. In passive scanning, the STA listens for beacon packets sent by neighboring APs, which are typically sent about e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/28H04Q7/24H04Q7/00
Inventor 安吉罗・卡费洛克里斯多福・凯夫保罗・马里内尔文森・罗伊
Owner INTERDIGITAL TECH CORP
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