Quality of Service Based Routing Algorithms for Heterogeneous Networks

Abstract

In the recent years, heterogeneous wireless networks have attracted increased attention due to development of different types of wireless communication technologies like Wireless WANs (e.g., 2G, 2.5G and 3G cellular systems) , Wireless MANs (e.g., IEEE 802.16) , Wireless LANs (e.g. IEEE 802.11a/b/e/g and Wireless Personal Area Networks e.g. Bluetooth) and the increasing desire for an integrated and ubiquitous networking environment. This thesis introduces a possible approach heterogeneous networks by integration of cellular networks, Wireless Local Area Networks (WLANs) and Mobile Ad hoc Networks (MANETs) and proposed as a step towards future Heterogeneous Wireless Networks (HWN). We identify main open issues and then, we propose and evaluate an integrated architecture, adaptable routing solutions, and an algorithm to allow the mobile user stations (MSs) to select the best connectivity alternative based on Quality of service (QoS) requirements of the application, network condition information and mobility profile. newline1.1 MOTIVATION newlineFrom the past more than decade experience of wireless communications system, we can say that it will play a major role in term of device and applications. The availability of a multitude of wireless technologies, such as Wireless WANs (e.g., 2G, 2.5G and 3G cellular systems), Wireless MANs (e.g., IEEE 802.16), Wireless LANs (e.g., IEEE 802.11a/b/e/g , and Wireless Personal Area Networks e.g., Bluetooth); combined with upcoming wireless standards, such as the High-Rate IEEE 802.15.3 WPANs, and the IEEE 802.22 Regional Area Networks, is expected to enable pervasive and seamless connectivity anytime anywhere . Also, multi-interface (multi-mode or multi-standard) devices, either equipped with multiple radios or empowered by the Software Defined Radio (SDR) technology, will become commonplace in newline- 14 - newlinefuture networking environments. newlineSuch heterogeneity in terms of network and devices has motivated the research efforts towards the next generation of communication systems, usually called Beyon