GSA-Based Jammer Localization in Multi-Hop Wireless Network
Tongxiang Wang, Xianglin Wei, Qin Lei Sun, Fei Hu · 2017
Multi-Hop Wireless Network (MHWN) can be easily attacked by the jammer for its shared nature and open access to the wireless medium. The jamming attack may prevent the normal communication through occupying the same wireless channel of legal nodes. It is critical to localize the jammer accurately, which may provide necessary message for the implement of antjamming mechanisms. However, current range-free methods aresensitive to the distribution of nodes and parameters of the jammer. In order to improve the localization accuracy, this article proposes the jammer localization method based on Gravitational Search Algorithm (GSA). At first, the initial particles are selected randomly from the jammed area. Then, the fitness function is designed based on range-free method. At each iteration, the massand position of the particles are updated. Finally, the position of particle with the maximum mass is considered as the estimated jammer's position. A series of simulations are conducted to evaluate our proposed algorithms and the simulation results show that the GSA-based localization algorithm achieves the best performances comparing with several existing algorithms.