关键词: 无线传感器网络, 源位置隐私保护, 随机角度, 扇形区域, 无重复最少跳数

Abstract: In wireless sensor networks used for target monitoring, aiming at the imbalance of security and energy consumption in source-location privacy preservation routing, a protocol called EPURA（Enhanced source-location Privacy Preservation protocol Using Random Angle） based on phantom routing is proposed. The phantom nodes are selected on base of combining the phantom source sub-region with random angle. Invalid paths are avoided by means of setting a tag field for the nodes in the visible area and the probability of overlapping path is greatly reduced when the packets are forwarded from the phantom nodes to the base station because of an excited flag. The MATLAB simulation results show that compared to the existing protocols, EPURA can effectively prolong the network safety time under the premise of increasing the energy consumption non-significantly.

Key words: wireless sensor networks, source-location privacy preservation, random angle, fan-shaped area, non-repetitive walk based on the least hops