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Wireless channel switching method and device

A wireless channel and channel technology, applied in the field of communication, can solve the problem of low accuracy of channel switching

Active Publication Date: 2014-02-19
RUIJIE NETWORKS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Embodiments of the present invention provide a wireless channel switching method and device to solve the problem of low accuracy of existing channel switching

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  • Wireless channel switching method and device

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Embodiment Construction

[0024] The specific implementation manners of a wireless channel switching method and device provided in the embodiments of the present invention will be described below with reference to the drawings in the description.

[0025] A wireless channel switching method provided by an embodiment of the present invention, such as figure 1 As shown, it specifically includes the following steps:

[0026] S11: The AP scans the current working channel and the preset non-working channel in the promiscuous mode according to the preset period in sequence, and obtains the scanning information of each channel;

[0027] Here, the scan information of each channel includes all probe response messages received by the AP within each set time period, and all data messages carrying retransmission message flag bits, node identifiers and message transmission rates;

[0028] S12: Determine the response time of each channel according to the probe response message in the obtained scanning information a...

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Abstract

The embodiment of the invention provides a wireless channel switching method and device. The method includes the steps that an AP sequentially scans a current working channel and a part of non-working channels for set durations in a promiscuous mode according to a preset period to acquire scanning information of the channels; response time of each channel is determined according to probe response messages in the scanning information and corresponding probe request messages sent by the AP in each set duration, and the determined channels with the response time being shorter than or equal to the set time are used as candidate channels; corresponding channel quality evaluation values are calculated according to retransmission message zone bits, node identification and the message transmission rate carried in data messages in the scanning information of the candidate channels, and the AP is switched to the candidate channels with the calculated channel quality evaluation values being larger than or equal to a preset threshold value. According to the wireless channel switching method and device, the AP scans the current working channel and the part of non-working channels in the promiscuous mode and can be switched to the channels with good channel quality, and switching accuracy is high.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a wireless channel switching method and device. Background technique [0002] For a wireless local area network (Wireless Local Area Network, WLAN), channels are very scarce resources, and each access point AP can only work on the channel allocated to it. Since there are a large number of possible interference sources in the WLAN working frequency band, such as radar, microwave, and interference caused by other APs in use and terminal STAs occupying the channel together, they will interfere with the normal operation of the AP. Switching is particularly important to ensure that each AP works on the channel with the best channel quality, and to reduce and avoid adjacent channel interference as much as possible. [0003] At present, the following process is usually used to switch the wireless channel: the AP scans the current working channel and the preset non-working channe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/00H04W36/30
Inventor 陈航
Owner RUIJIE NETWORKS CO LTD
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