An Efficient Hole-Bypassing Geographical Routing for Wireless Sensor Networks
Haitao Liu · Jisuanji fangzhen · 2010
Geographical routing,which eliminates the overhead of route packet flooding,is scalable and suitable for large-scale sensor networks.However,geographical routing often faces an important challenge in WSNs which is the local minimum phenomenon.Traditionally,most existing geographical routing protocols tend to route data packets along the boundaries of holes to bypass holes which are often referred to perimeter routing.This scheme may cause hole diffusion problem because the nodes on the boundaries of holes consume more energy on data delivery.Anchor-based protocol decreases hole diffusion problem,but anchor nodes that affect lifetime of network become bottleneck points.We present an efficient hole bypassing geographical routing for wireless sensor network(EHBR for short),which use dynamic anchors to bypass hole.Simulation results show that the proposed protocol decreases hole diffusion problem and improves network lifetime.