Abstract:
In wireless ad hoc networks, the devices are equipped with constrained energy resources,
therefore, efficient utilization of these resources is essential to prolong the operation of the
network. In this thesis, we address energy efficiency problem in selfish wireless ad hoc
networks and develop multiple algorithms to improve the performance of these networks.
The proposed solutions establish energy efficient network topology, minimize route discovery
overhead, and reduce interference in the network, which are the primary factors that degrade
the performance of the wireless ad hoc network. The proposed topology control solution
establishes connections among nodes using game theory such that the energy consumption
of the nodes is minimized. In order to reduce the energy consumption of the nodes during
route search operation, we develop two route discovery algorithms that reduce redundant
transmission of route request packets in the network. In addition, we propose an interference
aware cooperative routing (IACR) protocol that minimizes the interference in the network
by establishing low interference routes between source and the destination using node
cooperation. As a result, improvement in network throughput and reduction in energy
consumption is achieved. In order to prove the efficiency and improvement of proposed
solutions, we perform extensive simulations for various network parameters and compare
the results with previously proposed algorithms. The simulation results demonstrate that the
proposed algorithms improve the energy consumption of individual nodes during topology
establishment and route discovery phase while the IACR algorithm improves the end-to-end
quality of the route. The results show that the proposed solutions are better in terms of
reduced energy consumption, low end-to-end delay, higher throughput, and reduced control
packet overhead as compared to conventional approaches.
