Method for channel hopping and RF interference resistance in industrial radio network

Abstract

The invention provides a method of radio frequency interference resistance of hop channel in industrial wireless networks and relates to industrial wireless communication networks. The invention is based on the adding of hop channel information and beacon frames of communication protocols of the industrial wireless networks; a coordinator generates and broadcasts hop channel sequences of a system to all devices of a whole network and the hop channel information which contains take-off points of the system and the take-off points of an adjacency system is added into the load of the beacon frames; a router and a terminal device analyze the beacon frames and an unused take-off point is selected as the present take-off point; the coordinator and the router dynamically evaluate the channels of the networks and define the interfered channels by packet loss rates; the coordinator shields the interfered channels; a next channel of the interfered channels in the hop channel sequences replacesthe position of the interfered channels in the hop channel sequences; the radio frequency interference between industrial wireless network systems within the scope of the same radio frequency can be effectively avoided. The method can greatly improve the coexistence of industrial wireless network communication environments and the anti-interference capability.

Description

technical field [0001] The invention belongs to the industrial wireless network communication technology, in particular to an anti-jamming method of the industrial wireless network. Background technique [0002] With the rapid development of wireless communication technology, 802.11b, ZigBee, Bluetooth, IEEE 802.15.4 and other technologies are gradually being applied to industrial sites. The introduction of these wireless communication technologies solves the problems of difficult wiring in industrial sites and high installation and maintenance costs, but it cannot adapt to complex industrial site environments and cannot meet the needs of industrial sites. The IEEE 802.15.4 standard is a low-power, low-speed PHY / MAC standard. The network defined has the characteristics of energy saving and is suitable for industrial wireless networks, but it does not consider the interference between network channels. .4 The standard network is susceptible to the interference of the IEEE 80...

AI Technical Summary

Problems solved by technology

[0003] In view of the fact that the industrial field data transmission process is susceptible to interference from external noise and decays, and there is channel interference between different systems, in order to reduce or eliminate these interferences as much as possible and ensure the reliability of data transmission, a suitable industrial wireless system is proposed. The self-adaptive channel hopping method of the network can effectively solve the security problem of the internal data communication of the industrial wireless network and ensure the normal operation of the system. Continue to function normally without being affected by external interference, and unmask when the channel is cleared of interference

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