Access Delay Analysis in String Multi-hop Wireless Network Under Jamming Attack
Wireless networks can be easily attacked by jammers due to their shared nature and open access to the wireless medium. Jamming attack can degrade the network performance significantly by emitting useless signals to the wireless channel, i.e. the access delay of nodes’ packets will increase under jamming scenarios. In order to analyze the impact of jamming attack, this paper investigates the access delay of nodes’ packets in a string multi-hop wireless network. Specially, a ring-based model is put forward to calculate the existing probability of the jammer based on the stochastic geometry theory. Then, the collision probabilities of the nodes in different locations are derived while considering the impact of neighbor nodes and jammers. At last, the access delay of the packets under IEEE 802.11 protocols is obtained. A series of numerical tests are conducted to illustrate the impact of different jamming probabilities or jammer densities on the access delay.
KeywordsIEEE 802.11 Access delay String wireless network Jamming attack
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