Node Selection Based on Energy Consumption in MANET

In a Mobile Ad hoc Network, the mobility of a node is unpredictable. The mobility is considered as one of the characteristics of a wireless network. In addition, the energy constraint of the nodes must also be taken into consideration when designing routing protocols. This is an important issue since energy consumption reduces the wireless network connection lifetime. The nodes in MANET are fitted with batteries with limited capacities. In order to achieve an optimum route connection by extending the network lifetime, the distance factor of the source-intermediate-destination needs to be combined with the initial energy of the node when selecting a participating node in a route path. A probability based node selection method is proposed in this paper for identifying the intermediate node with optimum stored energy that could withstand through duration of connection. The algorithm has been tested with simulations and it has been proved that the node with the largest probability consumes the lowest energy. This not only helps to sustain the communication with the lowest chance of interruption, but also prolongs the network lifetime due to the lowest possible consumption of energy for a given communication.

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