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Anti-interference channel switching method suitable for wireless sensor network

A wireless sensor and channel switching 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: 2014-01-29
SOUTHEAST UNIV
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Problems solved by technology

[0008] 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. Moreover, there is still interference between internal nodes in the same network

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  • Anti-interference channel switching method suitable for wireless sensor network
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  • Anti-interference channel switching method suitable for wireless sensor network

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[0030] 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.

[0031] 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 (such as figure 2 As shown), the wireless sensor network channels based on IEEE802.15.4 are divided into four categories. The specific classification method is: according to the interference of three non-overlapping channels (channel 1, channel 6, and channel 11) of IEEE802.11 o...

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Abstract

The invention discloses an anti-interference channel switching method suitable for a wireless sensor network. At first, according to IEEE802.11 wireless channel distribution and IEEE802.15.4 wireless channel distribution, wireless sensor network channels based on the IEEE802.15.4 are classified. According to a classification result, the wireless sensor network channels are reconstituted to channel assemblies of different types. Wireless sensor network nodes are classified through a minimum repeated node coordination method to correspond to the channel assemblies of the different types. A time superframe is divided into a plurality of time slots, and each time slot is divided into multiple secondary time slots. The network nodes carry out awakening monitoring on the corresponding time slots through a pseudorandom algorithm or an inquiry dispatch list method. At last, each network node carries out channel switching on the corresponding time slot according to a Latin square algorithm and an initial channel of the network node. According to the method, the performance indexes of end-to-end data average time delay, the data time delay upper limit and time delay jittering are improved.

Description

[0001] Technical field [0002] The invention is a wireless sensor network, involving a anti -interference channel switching method suitable for wireless sensor networks. [0003] Background technique [0004] The rapid development of wireless technology is ubiquitous in various wireless networks in industry, office, and life.For example: IEEE802.11 (WIFI), IEEE 802.15.1 (Bluetooth), IEEE 802.15.4 (ZigBee) in 2.4GHz's ISM frequency bands, IEEETOOTH.In addition, there are some ropeless calls, microwave ovens and other devices in ISM frequency bands.In this way, various network interference and coexistence are arisen in the same environment. [0005] In order to solve the problem of interference and coexistence between the network, the researchers put forward a variety of ideas of multi -channel transmission.The fixed channel allocation is to allocate different receiving channels for each receiving node in the IEEE802.15.4 network, and no longer change during the working cycle.Alth...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W84/18H04B1/713H04W72/54
Inventor 胡晨刘野刘昊吴建辉
Owner SOUTHEAST UNIV
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