RCGS: Enhanced Relative Coordinate Geo-forwarding Scheme using Clear Channel Assessment Threshold to Detour Routing Holes in Wireless Sensor Networks
Wireless Sensor Networks areformed of several small sensor nodes capable of sensing and measuring the environmental phenomenon. These sensor networks are deployed in hostile environment which presents various anomalies during the deployment phase. It suffers from the routing hole, an area which is not covered by any node in the direction nearer to the destination. Geographic routing is considered as an attractive method for routing in sensor network since it uses only geographical information to make the packet forwarding decision. Currently, most of the geographic routing uses face based routing to recover the holes. Face routing employs planarization of entire network before forwarding the packets over the network. Thus it leads to the suboptimal performance of the networks. This paper presents a survey on different routing hole handling techniques and also the urgent issues to be solved. Later we propose a relative coordinate geo-forwarding scheme to resolve the routing hole problem by using relative co-ordinate system. It avoids the planarization of network thus minimizes the suboptimal performance of the network. Simulation results show the performance of the proposed approach along with the Clear Channel Assessment Threshold.