Improving Network Lifetime of Ad Hoc Network Using Energy Aodv (E-AODV) Routing Protocol in Real Radio Environments

摘要

One of the very serious problems facing a MANET (Mobile Ad hoc Network) is very limited life of its mobile nodes. Most MANET routing protocols use hop count as the cost metric, so the nodes along shortest paths may be used more often and exhaust their batteries faster, these protocols do not consider the energy problem because there is no exchange of information on the state of mobile nodes between the MAC protocol (Medium Access Control) and the routing protocols in order to support the power saving mechanisms. In this paper we propose the improvements of one of the most important routing protocols that is AODV (Ad hoc On demand Distance Vector). These improvements take into account a metric based on energy consumption during route discovery, thereby increasing the network lifetime, packet delivery ratio and decreasing load of control packets. Most researches in this domain are based on an ideal radio channel, in which a successful transmission is guaranteed if the distance between nodes is less than a certain threshold. However, wireless communication links normally suffer from the characteristics of realistic physical layer. So in order to give credibility to our work we use a realistic physical layer by modeling transmission errors by the Gilbert-Elliot model.