关键词: 无线传感器网络, 移动锚节点, 定位算法, 粒子群算法

Abstract: The node localization scheme of wireless sensor networks is essential to many applications，and many have been proposed for static WSN.This paper proposes a range-based algorithm PMAIL（PSO-based Mobile Anchor Incremental Localization），in which nodes are graded according to precision，and those with higher levels are chosen as reference to locate the unknown nodes incrementally.PSO algorithm is used to optimize the function of weighted errors.PMAIL does not specify any particular ranging method，and the mobile anchor could also be a sink node for data-gathering and network management.Simulations show that higher coverage is reached，and location precision increases approximately 9%.

Key words: wireless sensor networks, mobile anchor, localization, Particle Swarm Optimization（PSO）