Data-Gathering in Wireless Sensor Networks using Mobile Elements
Khaled A. Almi'ani, Ali Al ghonmein, Khaldun G. Al-Moghrabi, Muder Almiani · International Journal of Wireless & Mobile Networks · 2014
Using mobile gateway as mechanical data carrier has emerged as a promising approach to prolong the network lifetime and relaying information in partition networks.This mobile gateway periodically travels the network to gather the sensor data, where the gateway tour start and end at the sink.The gateway's tour length must be bounded by pre-defined time constant to avoid buffer overflow.In this paper, we investigate the problem of scheduling the mobile gateway tour in which the tour length satisfies bounding constraints while the sensors lifetime is also increased.We present an algorithmic approach that schedule gateway path by partitioning the network into clusters, so that one node from each cluster must be visited by a mobile gateway.Our experiment results demonstrate that the proposed approach significantly increases the network lifetime compare to networks with static-sink.Also, the quality of the obtained gateway is within 3/2 of the optimal solution tour length.