Optimal relay station placement in IEEE 802.16j networks

Authors:
Bin Lin;Pin-Han Ho;Liang-Liang Xie;Xuemin Shen
Affiliations:
University of Waterloo, Waterloo, Canada;University of Waterloo, Waterloo, Canada;University of Waterloo, Waterloo, Canada;University of Waterloo, Waterloo, Canada
Venue:
IWCMC '07 Proceedings of the 2007 international conference on Wireless communications and mobile computing
Year:
2007

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Abstract

To make the WiMAX Point-to-Multi-Point (PMP) systems more competitive and applicable to the future metropolitan area networking scenarios, deploying relay stations (RSs) as defined in IEEE 802.16j has been considered a promising solution that can replace the 802.16e mesh mode for coverage extension and throughput enhancement. In this paper, we are committed to tackle the task of RS placement and relay time allocation in IEEE 802.16j Mobile Multi-hop Relay (MMR) networks, in order to meet the uneven distributed traffic demand of each subscriber station (SS) as well as the thirst for system capacity. By incorporating advanced cooperative relaying technology such as Decode-Forward (D-F) or Compress-Forward (C-F), the task of RS placement and relay time allocation is formulated into an optimization problem, aiming at finding the optimal location of a single RS and the resource allocation for all the SSs. Numerical analysis is conducted through a number of case studies to demonstrate the performance gain by using the proposed approach for relay placement and relay time allocation.