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Analysis and optimization of a cross-layer adaptation mechanism for real-time applications in wireless networks

Triantafyllopoulou, D, Passas, N, Zervas, E and Merakos, L (2011) Analysis and optimization of a cross-layer adaptation mechanism for real-time applications in wireless networks WIRELESS NETWORKS, 17 (5). pp. 1339-1354.

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The theoretical analysis of a cross-layer mechanism for improving the quality of service of real-time applications in wireless networks is presented. The mechanism coordinates adaptations of the modulation order at the Physical layer and the media encoding mode at the Application layer, to improve packet loss rate, throughput and mean delay. With the use of Continuous Flow Modeling, the system is considered as a ``fluid'' queue with inflow and outflow rates representing its traffic generation and service rates, respectively. Each data source is modeled as a Markov chain, from the steady-state of which the optimal adaptation thresholds of the cross-layer mechanism are derived. Extensive performance evaluation results show that the optimized operation of the mechanism attains a significant performance improvement compared to both the sub-optimal case, and a legacy system, which adjusts the modulation order and encoding mode separately and independently of each other.

Item Type: Article
Divisions : Surrey research (other units)
Authors :
Passas, N
Zervas, E
Merakos, L
Date : 1 July 2011
DOI : 10.1007/s11276-011-0352-9
Uncontrolled Keywords : Science & Technology, Technology, Computer Science, Information Systems, Engineering, Electrical & Electronic, Telecommunications, Computer Science, Engineering, COMPUTER SCIENCE, INFORMATION SYSTEMS, ENGINEERING, ELECTRICAL & ELECTRONIC, TELECOMMUNICATIONS, Cross-layer design, Continuous flow model, Adaptive modulation, Encoding mode, ADAPTIVE MODULATION, DESIGN, TRANSMISSION, LINKS
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:07
Last Modified : 24 Jan 2020 21:44

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