To ensure QoS requirements for mixed-service in an orthogonal frequency division multiplexing relay system, we propose a relative largest queue aware first/relative proportional fair (R-LQAF/RPF) scheduling algorithm. By setting a relative variation function, we use an RPF scheduling algorithm to enhance the
realtime user throughput to meet the actual user rate requirements. We also use an R-LQAF scheduling algorithm to improve the scheduling performance, decrease the packet loss rate, and ensure QoS requirements for non-realtime user according to the relationship of the user queue length and the system queue length.Simulation results show that, compared with the existing proportional fair and the largest weighted delay first algorithm, the R-LQAF/RPF algorithm can flexibly choose different scheduling strategies for different businesses, effectively improve user performances in terms of throughput, packet loss rate, and satisfaction of demanded rate, and guarantee QoS requirements of mixed businesses.
DAI Cui-qin, WANG Liang, WANG Hai-bao
. QoS Guarantee for Mixed-Service in OFDM Relay System[J]. Journal of Applied Sciences, 2014
, 32(1)
: 13
-18
.
DOI: 10.3969/j.issn.0255-8297.2014.01.003
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