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Delay-Aware Network Optimization in LTE Based High-Speed Railway Wireless Networks

Authors:
Ali Hüseyin Rüstem
Selçuk Cevher
Hakan Ali Çırpan

Keywords: High-speed railway wireless networks; Delay requirements.

Abstract:
This paper presents an extended joint resource optimization framework for multi-service transmissions in high-speed railway (HSR) wireless networks by introducing the average delay constraint into the dynamic resource management problem. The system utility is maximized under the constraints of average delay, queue stability and average power by formulating a joint stochastic problem, which is transformed into a queue stability problem. Using Lyapunov drift theory, the queue stability problem is decomposed into separate convex subproblems. Golden section search method is used to achieve a globally optimal solution for the resource allocation subproblem. Finally, a distributed dynamic resource management technique is proposed, and its performance is evaluated under realistic conditions for HSR wireless networks. Numerical simulations show that our approach provides an improved throughput performance while satisfying the average delay requirements.

Pages: 57 to 62

Copyright: Copyright (c) IARIA, 2017

Publication date: July 23, 2017

Published in: conference

ISSN: 2308-4219

ISBN: 978-1-61208-572-2

Location: Nice, France

Dates: from July 23, 2017 to July 27, 2017