부산대학교 도서관

The adaptive service rate constraint (ASRC) algorithm was adopted to single carrier frequency division multiple access (SC-FDMA) system to achieve better spectral efficiency and less service rate waste heterogeneous traffic environment. The ASRC algorithm was proposed by integrating the adaptive admission control (AC) for reasonable scheduling priority provision. Considering the realistic transmission conditions, a queuing model with finite space observing first in first out (FIFO) rule was built under the cross-layer scheduling framework. Simulation results indicated that the ASRC algorithm improved transmission throughput and the quality of service (QoS) performance by contributing a performance trade-off between real-time (RT) and non-real-time (NRT) services and eliminating the service rate waste. The loss probability of ASRC was 4.32% and 2.68% lower than proportional fair (PF) and modified largest weighted delay first (M-LWDF) algorithm respectively, meanwhile the transmission throughput was 114.12% higher than the max-delay-utility (MDU) algorithm.