Method and device for resisting interference in wireless local area network
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A wireless local area and network technology, applied in wireless communication, network topology, power management, etc., can solve the problems of repeated operation of resources, reduce transmission power, deterioration, etc., to improve the network environment, improve overall performance, and reduce interference.
Active Publication Date: 2014-03-26
广州京信通信科技有限公司
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However, by passively detecting interference and adjusting its own power or channel to adapt to the current wireless environment, multiple APs that may cause mutual interference will perform self-adjustment, and then adjust to the same channel or reduc
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Embodiment 1
[0025] Currently, the WLAN network has a centralized WLAN, thin AP architecture, and a distributed WLAN, fat AP architecture. In the embodiment of the present invention, a centralized WLAN and thin AP architecture is taken as an example for description.
[0026] The characteristic of the centralized WLAN is that the AC (Access Controller, access controller) coordinates with the wireless terminal WTP (thin AP) to share various 802.11 services, and the AC performs centralized configuration on multiple WTPs. In the centralized WLAN architecture, the WTP and the access control point AC undertake part of the logical functions of the AP respectively, and the two coordinate and work together to realize all the logical functions of the AP. A LAN with this architecture can better solve problems in management, coordination configuration, radio frequency control, security, etc., making a large-scale WLAN easier to manage.
[0027] see figure 1 As shown, a method for anti-interference i...
Embodiment 2
[0041] In the embodiment of the present invention, the centralized WLAN is still taken as an example for description.
[0042] see figure 2 As shown, a method for anti-interference in a wireless local area network, comprising the following steps:
[0043] Step S201: Periodically poll all APs under the control of the AC, and perform interference avoidance operations in sequence. In one cycle, the channels in the same channel set can be periodically scanned, and each channel in the channel set can be generated according to the collected relevant information. The channel quality evaluation table of the channel to reflect the current quality status of each channel.
[0044] Step S202: Read the channel quality evaluation table of the current working channel of the currently processed AP.
[0045] Step S203: Enter the channel quality judgment step, which has 3 outputs: a), the current channel has radar signals, and the channel must be switched; b), the channel quality is good, an...
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Abstract
The invention provides a method and device for resisting interference in a wireless local area network. The method comprises the following steps that all APs are periodically polled, and the channel quality evaluation sheet of the current work channel of the currently-processed AP is acquired; whether the current work channel of the currently-processed AP reaches standards or not is judged according to the channel quality evaluation sheet; under the condition that the current work channel of the currently-processed AP does not reach the standards, whether the number of times of being substandard reaches a preset trigger threshold or not is judged; if the number of the times of being substandard reaches the preset trigger threshold, the automatic channel allocation algorithm of the currently-processed AP is triggered, and the work channel of the currently-processed AP is adjusted; if the number of the times of being substandard does not reach the preset trigger threshold, an interference source interfering the currently-processed AP is searched for, the power control algorithm of the interference source is triggered, and the power of the interference source is adjusted. According to the method and device, interference in the current wireless local area network is reduced, the overall performance of the wireless local area network is improved, the method and device can be applied to existing 802.11a/b/g/n and evolution versions following the 802.11a/b/g/n, and whole-network interference processing is achieved in a co-ordination mode.
Description
technical field [0001] The invention relates to the technical field of wireless local area networks, in particular to an anti-interference method in a wireless local area network and an anti-interference device in a wireless local area network. Background technique [0002] Due to the high speed and low cost of the WLAN (Wireless Local Area Networks, wireless local area network) network, it can complement the advantages of the mobile communication network, provide the latter with high-quality indoor data service distribution technology, and has a suitable carrier-class operation mode, so in the near future The development is very rapid. At the same time, the interference problem has also become one of the main bottlenecks restricting its development. First of all, the number of effective channels in WLAN networks is limited, and its own characteristics lead to interference within the system: co-channel interference within the cell, adjacent channel interference between adja...
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