Adaptive Resource Allocation Scheduling Algorithm for Multi-service Application in OFDMA System
Zhu Xiao-rong①② Luo Xiao-qin① Zhu Hong-bo①
①(College of Telecommunications & Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China) ②(National Mobile Communications Research Laboratory, Southeast University, Nanjing 210003, China)
Aimed at the problem of downlink multiservice adaptive scheduling in Orthogonal Frequency-Division Multiple Access (OFDMA) system, a universal model for multiservice adaptive resource allocation is built, which is to maximize system throughput, under the constraints of Quality of Service (QoS) guarantees. In order to resolve this optimization problem, a multiservice adaptive resource scheduling algorithm is proposed. In this algorithm, the real-time service is allocated as little resource as possible to guarantee its QoS by “the user choosing the best channel” whereas the non-real time service is allocated the residual resource by “the channel choosing the best user” to increase the system capacity. The simulation results show that the proposed algorithm can guarantee the throughputs of the downlink OFDMA systems and meanwhile have some advantages in aspects of delay and packet dropping rate of real-time services.
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2015, Vol. 37 
