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An anti-interference channel switching method suitable for wireless sensor networks

A wireless sensor and wireless channel technology, applied in wireless communication, network topology, transmission system, etc., can solve the problems of internal node interference, can not quickly jump out of the interference area, etc., to reduce performance, reduce interference, and reduce transmission interference. Effect

Inactive Publication Date: 2016-06-15
SOUTHEAST UNIV
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  • Abstract
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Problems solved by technology

[0006] Although the non-control channel pseudo-random frequency hopping algorithm has a certain effect in solving internal and external interference, we found that this frequency hopping method cannot quickly jump out of the interference area, and there is still interference between internal nodes in the same network

Method used

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  • An anti-interference channel switching method suitable for wireless sensor networks
  • An anti-interference channel switching method suitable for wireless sensor networks
  • An anti-interference channel switching method suitable for wireless sensor networks

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Embodiment Construction

[0025] The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0026] figure 1 It is a schematic diagram of an application scenario of an embodiment of the present invention. The schematic diagram shows that in the same environment, a wireless sensor network and a WiFi network coexist and work in the 2.4GHz industrial and medical frequency bands. In the present invention, at first according to IEEE802.11 wireless channel distribution definition and IEEE802.15.4 wireless channel definition (as figure 2 As shown), the wireless sensor network channels based on IEEE802.15.4 are divided into four categories, and the specific classification method is: according to the interference of three non-overlapping channels (channel 1, channel 6, and channel 11) of IEEE802.11 on ...

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Abstract

The invention discloses an anti-jamming channel switching method suitable for a wireless sensor network. Firstly, according to IEEE802.11 wireless channel distribution and IEEE802.15.4 wireless channel distribution, IEEE802.15.4-based wireless sensor network channels are classified. According to the classification results, different types of channel sets are reorganized. The wireless sensor network nodes are classified by the minimum repeated node negotiation method, and correspond to the above-mentioned different types of channel sets. The temporal superframe is divided into multiple time slots, and each time slot is divided into multiple sub-time slots. Network nodes perform wake-up monitoring in corresponding sub-time slots through pseudo-random algorithm or query schedule method. Finally, network nodes perform channel switching according to their own Latin square algorithm and initial channel in each time slot. The method of the invention is improved in end-to-end data average delay, data delay upper limit and delay jitter performance index.

Description

technical field [0001] The invention belongs to the field of wireless sensor networks, and relates to an anti-interference channel switching method suitable for wireless sensor networks. Background technique [0002] With the rapid development of wireless technology, various wireless networks are ubiquitous in industry, office and life. For example: IEEE802.11 (WiFi), IEEE802.15.1 (Bluetooth), and IEEE802.15.4 (ZigBee) exist in the 2.4GHz ISM frequency band. In addition, there are devices such as cordless phones, microwave ovens and others that are active in the ISM band. This creates the problem of interference and coexistence of various networks in the same environment. [0003] In order to solve the problem of inter-network interference and coexistence, researchers have proposed a variety of multi-channel transmission ideas. Fixed channel allocation means that each receiving node is allocated a different receiving channel in the IEEE802.15.4 network, and will not chang...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/08H04W84/18H04B1/713H04W72/54
Inventor 胡晨刘野刘昊吴建辉
Owner SOUTHEAST UNIV
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