On multiple time scales link estimation in wireless sensor network

According to the link instability and asymmetry of wireless sensor network, the multiple time scales link estimation (MTSLE) algorithm which takes into account long and short time scales link estimation is proposed. In MTSLE, building the topology structure by both stable link and bursty link, a bursty links discovery strategy is designed to achieve opportunistic routing. Meanwhile, the algorithm also considers a multi-path ACK policy for packet duplication cause by the asymmetry bursty links, reduces the number of duplicate packets. Experimental results show that MTSLE algorithm not only reduces the average path length but also saves energy and improve the packet reception rate to some extent, while multi-path strategy also solves the problem of packet duplication.