Handoff Management Schemes in Wireless Mesh Networks

Recent advances in Wireless Mesh Networks (WMNs) have overcome the drawbacks of traditional wired networks and wireless ad hoc networks. WMNs will play a leading role in the next generation of networks, and the question of how to provide smooth mobility for WMNs is the driving force behind the resea...

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Main Author: Zhang, Zhenxia
Other Authors: Boukerche, Azzedine
Language:en
Published: Université d'Ottawa / University of Ottawa 2012
Subjects:
Online Access:http://hdl.handle.net/10393/23073
http://dx.doi.org/10.20381/ruor-5874
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spelling ndltd-uottawa.ca-oai-ruor.uottawa.ca-10393-230732018-01-05T19:01:19Z Handoff Management Schemes in Wireless Mesh Networks Zhang, Zhenxia Boukerche, Azzedine Handoff Wireless Mesh Networks Smooth roaming Recent advances in Wireless Mesh Networks (WMNs) have overcome the drawbacks of traditional wired networks and wireless ad hoc networks. WMNs will play a leading role in the next generation of networks, and the question of how to provide smooth mobility for WMNs is the driving force behind the research. The inherent characteristics of WMNs, such as relatively static backbones and highly mobile clients, require new handoff management solutions to be designed and implemented. This thesis first presents our research work on handoff management schemes in traditional WMNs. In general, a handoff process includes two parts, the MAC layer handoff and the network layer handoff. For the MAC layer handoff, a self-configured handoff scheme with dynamic adaptation is presented. Before the mobile node starts the probe process, it configures parameters for each channel to optimize the scan process. Moreover, a fast authentication scheme to reduce authentication latency for WiFi-based mesh networks is introduced. A tunnel is introduced to forward data packets between the new access router and the original reliable access router to recover data communication before the complete authentication process is finished. To minimize the network layer handoff latency, a hybrid routing protocol for forwarding packets is proposed: this involves both the link layer routing and the network layer routing. Based on the hybrid routing protocol, both intra-domain and inter-domain handoff management have been designed to support smooth roaming in WMNs. In addition, we extend our work to Vehicular Mesh Networks (VMNs). Considering the characteristics of VMNs, a fast handoff scheme is introduced to reduce handoff latency by using a multi-hop clustering algorithm. Using this scheme, vehicle nodes are divided into different multi-hop clusters according to the relative mobility. Some vehicle nodes are selected as assistant nodes; and these assistant nodes will help the cluster head node to determine the next access router for minimizing handoff latency. Extensive simulation results demonstrate that the proposed scheme can reduce handoff latency significantly. 2012-07-16T14:17:35Z 2012-07-16T14:17:35Z 2012 2012 Thesis http://hdl.handle.net/10393/23073 http://dx.doi.org/10.20381/ruor-5874 en Université d'Ottawa / University of Ottawa
collection NDLTD
language en
sources NDLTD
topic Handoff
Wireless Mesh Networks
Smooth roaming
spellingShingle Handoff
Wireless Mesh Networks
Smooth roaming
Zhang, Zhenxia
Handoff Management Schemes in Wireless Mesh Networks
description Recent advances in Wireless Mesh Networks (WMNs) have overcome the drawbacks of traditional wired networks and wireless ad hoc networks. WMNs will play a leading role in the next generation of networks, and the question of how to provide smooth mobility for WMNs is the driving force behind the research. The inherent characteristics of WMNs, such as relatively static backbones and highly mobile clients, require new handoff management solutions to be designed and implemented. This thesis first presents our research work on handoff management schemes in traditional WMNs. In general, a handoff process includes two parts, the MAC layer handoff and the network layer handoff. For the MAC layer handoff, a self-configured handoff scheme with dynamic adaptation is presented. Before the mobile node starts the probe process, it configures parameters for each channel to optimize the scan process. Moreover, a fast authentication scheme to reduce authentication latency for WiFi-based mesh networks is introduced. A tunnel is introduced to forward data packets between the new access router and the original reliable access router to recover data communication before the complete authentication process is finished. To minimize the network layer handoff latency, a hybrid routing protocol for forwarding packets is proposed: this involves both the link layer routing and the network layer routing. Based on the hybrid routing protocol, both intra-domain and inter-domain handoff management have been designed to support smooth roaming in WMNs. In addition, we extend our work to Vehicular Mesh Networks (VMNs). Considering the characteristics of VMNs, a fast handoff scheme is introduced to reduce handoff latency by using a multi-hop clustering algorithm. Using this scheme, vehicle nodes are divided into different multi-hop clusters according to the relative mobility. Some vehicle nodes are selected as assistant nodes; and these assistant nodes will help the cluster head node to determine the next access router for minimizing handoff latency. Extensive simulation results demonstrate that the proposed scheme can reduce handoff latency significantly.
author2 Boukerche, Azzedine
author_facet Boukerche, Azzedine
Zhang, Zhenxia
author Zhang, Zhenxia
author_sort Zhang, Zhenxia
title Handoff Management Schemes in Wireless Mesh Networks
title_short Handoff Management Schemes in Wireless Mesh Networks
title_full Handoff Management Schemes in Wireless Mesh Networks
title_fullStr Handoff Management Schemes in Wireless Mesh Networks
title_full_unstemmed Handoff Management Schemes in Wireless Mesh Networks
title_sort handoff management schemes in wireless mesh networks
publisher Université d'Ottawa / University of Ottawa
publishDate 2012
url http://hdl.handle.net/10393/23073
http://dx.doi.org/10.20381/ruor-5874
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