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Performance Evaluation of Simple-Relay Aided Resource Allocation and Throughput Guarantee Scheduler in IEEE 802.16 TDD-OFDMA Downlink  

Ki, Young-Min (Dept. of Electrical and Electronics Engineering, Yonsei University)
Byun, Dae-Wook (Dept. of Electrical and Electronics Engineering, Yonsei University)
Kim, Dong-Ku (Dept. of Electrical and Electronics Engineering, Yonsei University)
Son, Haeng-Seon (SoC Research Center, Korea Electronics Technology Institute)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.43, no.11, 2006 , pp. 85-94 More about this Journal
Abstract
Simple-relay aided resource allocation (SRARA) schemes are incorporated with throughput guarantee scheduling (TGS) in IEEE 802.16 type TDD-OFDMA downlink to enhance service coverage, where the amount of resources at each relay is limited due to either its available power which is much smaller than base station (BS) power or the required overhead The performance of SRARA schemes is evaluated with both proportional fair (PF) and TGS schedulers at 64 kbps and 128 kbps user throughput requirements. For SRARA with RSs of relatively lower power, a scheme putting total power into only one subchannel shows larger coverage than when both subchnnels are used in a manner of equal power allocation, while the RS with evenly power-allocated two subchannels could provide larger coverage gain for a relatively higher power. In a lower target (64kbps), more improvement comes from relay scheme rather than scheduler design. For a relatively higher level (128 kbps), it comes from scheduler design rather than relay.
Keywords
IEEE 802.16 TDD-OFDMA;
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