Abstract: Multi-hop Wireless Network (MHWN) can be easily attacked by adversaries due to its shared nature and open access to the wireless medium.In order to reveal the character of jamming attack and analyze its impact on the network performance,three typical jamming attacks were studied in this paper.According to the stochastic geometry and jamming strategies,the memoryless jammer random jammer,and reactive jammer are modeled at first.Then,the power of jamming signals is calculated based on the jamming model and theoretical results of collision probability and average access delay for the network nodes are derived.At last,a series of the numerical tests are conducted.

Key words: Access delay, Collision probability, Jamming attack, Multi-hop wireless network