THROUGHPUT ENHANCEMENT OF WIRELESS SENSOR NETWORK LOCALIZATION ACCURACY AGAINST JAMMING ATTACKS

Since wireless sensor network is a shared medium, jamming attacks can be launched by adversary emitting the radio frequency signal. Therefore, jamming attacks affect the localization process. Range based methods like received signal strength indication (RSSI) is affected a lot by physical jamming attacks. This paper proposes a solution based on modified multi-frequency multipower antenna to provide a robust and accurate localization technique. In this paper, continuous, random, capture and replay jammers are simulated to test the localization accuracy of the RSSI algorithm. However, the access point sends beacons in different frequencies and jammer cannot jam all the frequencies, sensor nodes will be able to receive beacons in spite of the existence of continuous and random jammers. The only problem now is with capture and replay jammers. Therefore, this paper proposes a set of filters to eliminate the replayed beacons. The simulation results showed a powerful and improved localization accuracy against jamming attacks by detecting, filtering and eliminating the effect of these attacks.