Radio-over-fiber for increasing effective coverage of motorway access networks

Authors:
Weixi Xing;Yue Li;Xuan Huan Nguyen;Jun Zheng
Affiliations:
Wireless Communication Research Laboratory (WCRL), Institute of Advanced Telecommunications Swansea University, Singleton Park, Swansea SA2 8PP, UK.;Wireless Communication Research Laboratory (WCRL), Institute of Advanced Telecommunications Swansea University, Singleton Park, Swansea SA2 8PP, UK.;Wireless Communication Research Laboratory (WCRL), Institute of Advanced Telecommunications Swansea University, Singleton Park, Swansea SA2 8PP, UK.;School of Information Technology and Engineering, University of Ottawa, 800 King Edward Street Ottawa, Ontario K1N 6N5, Canada
Venue:
International Journal of Communication Networks and Distributed Systems
Year:
2009

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Abstract

This paper proposes a radio-over-fiber (RoF) system architecturefor a motorway access network to provide broadband communicationfor high-speed vehicles. The proposed system architecture employs astar-tree topology with a central control system connected to thefixed-line data collection parts on one side and the wirelessaccess points (APs) on the other side to transmit data informationfrom/to road vehicles. To address the coverage problem, amotor-picocell scheme (MPS) is proposed, which converts aconventional base station (BS) into a number of picocells anddeploy the picocells along a motorway based on the combination ofRoF and TDMA technologies. To improve the performance of theproposed system architecture, a cross-layer design is also proposedbased on joint adaptive modulation (AM) and buffer management. Inthe cross-layer design, the AM scheme adapted to the channelquality can result in different transmission rate at thetransmitter side and packet error rate at the receiver side, andthe jointly-designed buffer management scheme with an optimalthreshold can achieve the best utilisation of the network.