Co-channel attack may cause data blocking and distortion in ZigBee networks. To resolve the issues, a model to detect co-channel attack is proposed. According to the Gauss distributed characteristics of the signal spectrum and the influence of co-channel attack on transform-domain amplitude, the proposed model can perceive whether the co-channel attack is existent in ZigBee network. On this basis, a scheme to detect and restrain co-channel attack is provided by embedding the free band channel-hop mechanism and self-adaption algorithm based on variable backoff cycle and access probability. Finally, experimental results indicate that the proposed model and scheme can inhibit the co-channel attack?efficiently.
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