Cross-Layer Design for End-to-End Throughput Maximization and Fairness in MIMO Multihop Wireless Networks
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Research Article Cross-Layer Design for End-to-End Throughput Maximization and Fairness in MIMO Multihop Wireless Networks Jain-Shing Liu,1 Chun-Hung Richard Lin,2 and Kuang-Yuan Tung2 1 Department
of Computer Science and Information Engineering, Providence University, 200 Chung Chi Rd., Shalu, Taichung Hsien 43301, Taiwan 2 Department of Computer Science and Engineering, National Sun Yat-Sen University, No. 70, Lienhai Rd., Kaohsiung 80424, Taiwan Correspondence should be addressed to Jain-Shing Liu, [email protected] Received 12 August 2009; Accepted 7 February 2010 Academic Editor: A. Lee Swindlehurst Copyright © 2010 Jain-Shing Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. MIMO links can significantly improve network throughput by supporting multiple concurrent data streams between a pair of nodes and suppressing wireless interference. In this paper, we study joint rate control, routing, and scheduling in MIMO-based multihop wireless networks, which are traditionally known as transport layer, network layer, and MAC layer issues, respectively. Our aim is to find a rate allocation along with a flow allocation and a transmission schedule for a set of end-to-end communication sessions so as to maximize the network throughput and also to achieve the proportional or weighted fairness among these sessions. To this end, we develop Transmission Mode Generating Algorithms (TMGAs), and Linear Programming- (LP-) and Convex Programming- (CP-) based optimization schemes for the MIMO networks. The performances of the proposed schemes are verified by simulation experiments, and the results show that the different schemes have different performance benefits when achieving a tradeoff between throughput and fairness.
1. Introduction Recent advances in wireless communications and computing technologies enable a broad range of network applications. To facilitate these applications for the fast-growing number of mobile users and services, the communication society intensifies the interest in the development of novel approaches that can increase the overall network capacity. With the enlarged requirement, future multihop wireless networks such as wireless backhaul networks (WBNs) and wireless mesh networks (WMNs) are conducted to support various data and multimedia transmissions that are usually bandwidth-consumed. In such networks, the Multiple-Input Multiple-Output (MIMO) antenna system, which can offer multiple Degree of Freedom (DOFs) for communications in a node while reducing interference and improving network throughput, is one of the technologies to this end, and attracts much attention of recent research on communication [1–3]. However, when considered with networking, it is still in its early stage. For example, in [4], the authors devise a
MIMO-based MAC protocol and develop analytical methods to characterize the corresponding saturation throughput
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