An evaluation of the TPGF protocol implementation over NS-2

Wireless multimedia sensor networks (WMSNs) is one of the hotest topic nowadays which attracts more and more researchers as being an interdisciplinary research interest. Its cost decreases continuously due to advances in micro-electromechanical systems, and the proliferation and progression of wireless communications. However, the transmission of multimedia information must satisfy QoS criteria which increases energy consumption. This issue should be taken into consideration in the protocol design for WMSNs. In this paper, we propose an implementation and an evaluation of the TPGF routing protocol (Two Phase geographical Greedy Forwarding) over the network simulator NS2. The TPGF module over NS-2 is available for the research community. In this evaluation, we compare the TPGF performances with two other protocols: the well known AODV protocol and the EA-TPGF protocol (our previous work on an extension of the TPGF protocol which takes into account the remaining energy of nodes during the process of path identification). The performance metrics measured to evaluate the QoS of each protocol are: delay, PDR, remaining energy of each node at the end of the communication and the standard deviation of remaining energy. Simulations show promising results in terms of network life extension when TPGF is used.