Topology control and interference aware resource allocation algorithms using directional antenna for QoS (802.16e) performance in multi-hop wireless networks

Abstract

In recent years, there has been a lot of research work being done on the wireless networking using Directional antennas. But not many approached the issue together with resource allocation and channel assignment in multi-channel multi-radio networks, especially in multi-hop WiMAX (802.16e) networks. This work also explores the implementation of Directional antenna for communication in mobile scenario where the nodes move either in specified trajectory or randomly. The overall goal of this research is to work towards improving the wireless communication and proposing solutions for some existing issues. The methods of topology control algorithms for maximizing the minimum link capacity and then a different approach to balance the network load should be one of the few pieces of work in this regard. Implementation of these proposed methods have improved the network performance in aspects like throughput, delay, network capacity, interference, traffic congestion and network balance. The major issues that determine the performance of wireless networks include traffic congestion, interference, signal quality, Quality of Service (QoS), mobility issues like handover. These issues for a multi-hop WiMAX scenario that would possibly emerge in future were studied and solution were suggested and tested. Large numbers of WiMAX scenarios of different sizes with different type of applications, models, devices, resources and methodologies have been simulated and various aspects like mobility, QoS, interference control, traffic congestion and network balance have been studied. During the course of research, various wireless communication issues have been addressed by providing feasible to optimal solutions; new designs and methodologies for the WiMAX models is being incorporated to induce useful functionalities; communication models, antennas and other devices and technically enhanced. Also, the QoS in WiMAX networks hasn't been studied much; our research work includes simulation and detailed analysis of various service classes in different conditions and scenarios for WiMAX multi-hop networks.