Network Connectivity based Topology Control for Mobile Ad hoc Networks

Abstract

Energy consumption and network connectivity are two of the important research issues that are yet to be resolved in mobile ad hoc networks (MANETs). However, only a few topology control methods (e.g. [1]) take into account the low interference as a goal of the methods. Some researchers tried to indirectly reduce the interference by reducing the transmission power or by devising low degree topologies, but none of those protocols can guarantee low interference. In this research work, we propose Network Connectivity based Topology Control (NCTC) to make the correct the balance between interference and energy in order to improve the network lifetime of networks. It consists of two phases. In first phase, the reduction of interference is achieved. In second phase, efficient topology control based on energy constraint is proposed to extend the network lifetime of networks. By using the extensive simulation results using Network Simulator (NS2), the proposed scheme NCTC achieves better network lifetime, packet delivery ratio, less overhead and end to end delay than the existing schemes.

A cooperation-based approach to energy optimization in wireless ad hoc networks

“…As anticipated, in the 25 nodes testbed, nodes 1,3,6,8,12,16,18,21,23 (24,0), (4,20), (20,4), (6,9), (8,5), (13,10), (11,14), (16,19), and (18,15). Each experiment lasts 720s.…”

“…Ten sessions of UDP constant bit rate traffic are generated between the node pairs (1, 4), (3, 0), (6,9), (8,5), (11,14), (13,10), (16,19), (18,15), (21,24) and (23,20). The experiment lasts 300s.…”

“…Local decisions set the node status on the basis of both the amount of energy still available and the benefit given to the neighbors. The authors of [18] also embrace an approach based on network topology. They propose to check energy consumption in each discovered route and further monitor its updated level in subsequent maintenance cycles.…”

“…Several sessions of traffic are generated between pairs of nodes, as we will detail in Section 5. Nodes 1, 3,6,8,12,16,18,21,23 can adopt a defective behavior, that is, they can refuse to relay packets for other nodes. The remaining nodes are instead always cooperative.…”