On-demand energy-efficient routing for delay-constrained service in power-controlled multihop cellular network

In a multihop cellular network, energy-efficient routing is an important issue because the network consists of battery powered mobile nodes. Although an energy-efficient routing algorithm (MTPR) was proposed previously to minimize the total transmission power, it does not consider the end-to-end delay between a source node and a destination node. Generally, as the path selected using MTPR in a power-controlled network is more energy efficient, it causes larger end-to-end delay. Thus, it is more realistic to find an energy-efficient path with an explicit delay constraint. We propose an on-demand energy-efficient routing protocol for delay-constrained services in power-controlled multihop cellular networks. Computer simulations show that the proposed scheme outperforms AODV with respect to the total transmission power, while maintaining the same average success rate. Moreover, the proposed scheme can approximate the optimal solution by adjusting its parameters, and is more suitable for delay-constrained service than AODV.