Performance Evaluation of QoS Based Improved Rumour Routing Scheme for WSN

The emerging field of wireless sensor networks (WSNs) combines sensing, computation and communication into a single tiny device. The power of wireless sensor networks lies in the ability to deploy large numbers of tiny nodes that assemble and configure themselves. Usage scenarios for these devices range from real-time tracking, monitoring of environmental conditions, ubiquitous computing environments, in situ monitoring of the health of structures or equipment. The up-coming networks are expected to support a wide range of communication-intensive, real-time multimedia applications. The requirement for timely delivery of data raises new challenges for the next generation networks. One of the key issues is the Quality-of-Service (QoS) routing. It selects network routes with sufficient resources for the requested QoS parameters. Node routing protocols have been specifically designed for WSNs in which energy conservation is an essential design issue. Rumour Routing (RR) is a hybrid protocol which combines both proactive and reactive routing methods, which balances event, query flooding and adapted to the case of few data and many queries. It is proposed to develop a QoS based Relative Coordinate Rumour Routing protocol based on a straight line random walk approach. The main objective is to evaluate the performances of the proposed protocol under different situations and considering different factors such as network size or the impact of the positions of the Beacon nodes. The performances are evaluated through network simulator2 (NS2).The simulation results indicate the superiority of proposed scheme compared with Rumour Routing, in terms of performance indices, provide better path quality and higher data delivery ratio.