Energy-Efficient and QoS-Aware Multi-Path Geographic Routing Protocol for WMSN

Abstract

Wireless multimedia sensor networks (WMSN) are used in various applications such as surveillance, health care, and environment monitoring. There is a need to design energy-efficient routing protocol capable of supporting the QoS requirements of multimedia traffic. In this work, we study the Adaptive Greedy-compass Energy-aware Multipath routing protocol and consider its shortcomings when applied for multimedia data. We then present three enhancements to the original protocol. First, the routing mechanism is changed to extend a wider angle scope for path generation. Second, we add the angle of view and distance towards the sink as metrics in the cost function of the original protocol. Finally, the protocol is modified to support different traffic types with different QoS requirements. Simulation results show that the enhanced protocol achieves a higher number of generated paths and an improvement in the overall network lifetime. These two improvements are necessary for dependable delivery of multimedia traffic.