Distributed stochastic cross-layer optimization for multi-hop wireless networks With cooperative communications

Yang, Shusen, Sheng, Zhengguo, McCann, J A and Leung, K K (2014) Distributed stochastic cross-layer optimization for multi-hop wireless networks With cooperative communications. IEEE Transactions on Mobile Computing, 13 (10). pp. 2269-2282. ISSN 1536-1233

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Abstract

Cooperative communication has been shown to have great potential in improving wireless link quality. Incorporating cooperative communications in multi-hop wireless networks has been attracting a growing interest. However, most current research focuses on either centralized solutions or schemes limited to specific network problems. In this paper, we propose a distributed framework that uses Network Utility Maximization (NUM) to optimize the following joint objectives: flow control, routing, scheduling, and relay assignment; for multi-hop wireless cooperative networks with general flow and cooperative relay patterns. We define two special graphs, Hyper Forwarding Graphs (HFG) and Hyper Conflict Graphs (HCG), to represent all possible cooperative routing policies and interference relations among the cooperative relays respectively. Based on HFG and HCG, a stochastic mixed-integer non-linear programming problem is formulated. We then propose lightweight algorithms to solve these in a fully distributed manner, and derive the theoretical performance bounds of these proposed algorithms. Simulation results verify our theoretical analysis and reveal the significant performance gains of our framework, in terms of throughput, flexibility, and scalability. To our knowledge, this is the first distributed cross-layer optimization framework for multi-hop wireless cooperative networks with general flow and cooperative relay patterns.

Item Type: Article
Keywords: cooperative communication;graph theory;integer programming;nonlinear programming;radiofrequency interference;relay networks (telecommunication);stochastic processes;telecommunication network routing;HCG;HFG;NUM;cooperative communication;cooperative relay patterns;distributed cross-layer optimization framework;flow control;hyper conflict graphs;hyper forwarding graphs;multihop wireless networks;network utility maximization;relay assignment;routing;stochastic mixed-integer nonlinear programming problem;wireless link quality;Cooperative systems;Optimization;Relays;Routing;Spread spectrum communication;Wireless networks;Cooperative relaying;Distributed networks;Network communications;Optimization;Wireless communication;cooperative routing;cooperative scheduling;flow control;stochastic network optimization
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA0329 Engineering mathematics. Engineering analysis
Depositing User: Zhengguo Sheng
Date Deposited: 22 Jan 2015 08:19
Last Modified: 22 Jan 2015 08:25
URI: http://sro.sussex.ac.uk/id/eprint/52333
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