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State-Aware re-configuration model for multi-radio wireless Mesh Networks

Zakaria, Omar and Hassan Abdalla Hashim, Aisha and Hassan, Wan Haslina and Khalifa, Othman Omran and Azram, Mohammad and Goudarzi, Shidrokh and Jivanadham, Lalitha Bhavani and Zareei, Mahdi (2017) State-Aware re-configuration model for multi-radio wireless Mesh Networks. KSII Transactions on Internet and Information Systems, 11 (1). pp. 146-170. ISSN 1976-7277

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Joint channel assignment and routing is a well-known problem in multi-radio wireless mesh networks for which optimal configurations is required to optimize the overall throughput and fairness. However, other objectives need to be considered in order to provide a high quality service to network users when it deployed with high traffic dynamic. In this paper, we propose a re-configuration optimization model that optimizes the network throughput in addition to reducing the disruption to the mesh clients’ traffic due to the re-configuration process. In this multi-objective optimization model, four objective functions are proposed to be minimized namely maximum link-channel utilization, network average contention, channel re-assignment cost, and re-routing cost. The latter two objectives focus on reducing the re-configuration overhead. This is to reduce the amount of disrupted traffic due to the channel switching and path re-routing resulted from applying the new configuration. In order to adapt to traffic dynamics in the network which might be caused by many factors i.e. users’ mobility, a centralized heuristic re-configuration algorithm called State-Aware Joint Routing and Channel Assignment (SA-JRCA) is proposed in this research based on our re-configuration model. The proposed algorithm re-assigns channels to radios and re-configures flows’ routes with aim of achieving a tradeoff between maximizing the network throughput and minimizing the re-configuration overhead. The ns-2 simulator is used as simulation tool and various metrics are evaluated. These metrics include channel-link utilization, channel re-assignment cost, re-routing cost, throughput, and delay. Simulation results show the good performance of SA-JRCA in term of packet delivery ratio, aggregated throughput and re-configuration overhead. It also shows higher stability to the traffic variation in comparison with other compared algorithms which suffer from performance degradation when high traffic dynamics is applied.

Item Type: Article (Journal)
Additional Information: 2523/54230
Uncontrolled Keywords: Multi-Radio; Wireless Mesh Networks; State-Aware Re-configuration; Joint Channel Assignment and Routing
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunication. Including telegraphy, radio, radar, television
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Depositing User: Prof. Dr. Aisha Hassan Abdalla Hashim
Date Deposited: 17 Jan 2017 10:13
Last Modified: 03 Jul 2017 17:11
URI: http://irep.iium.edu.my/id/eprint/54230

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