Joint Cooperative Diversity and Proportional Fair Scheduling in OFDMA Relay Systems
Poramate Tarasak, Sumei Sun · 2008
Previously proposed technique called joint cooperative diversity and scheduling (JCDS) has been shown to increase aggregate throughput of multiuser OFDMA relay networks significantly while being able to maintain per-link throughput when the number of relays is high enough. This paper proposes a new technique so-called joint cooperative diversity and proportional fair scheduling (JCPFS) for the multiuser OFDMA relay networks which sacrifices a small amount of the aggregate throughput in return for significant improvement in the per-link throughput. Unlike JCDS, JCPFS provides increases in both aggregate and per-link throughputs as the number of users increases. The throughput performance of JCPFS is characterized by delay spread of the channels and its effect is shown by simulation.