Title :
Opportunistic Scheduling for Heterogeneous Services in Downlink OFDMA System
Author :
Shen, Jun ; Yi, Na ; Liu, An ; Xiang, Haige
Author_Institution :
Sch. ofEECS, Peking Univ., Beijing
Abstract :
We consider opportunistic scheduling in a downlink OFDMA system to support heterogeneous services. Given the user´s queue state information (QSI) and channel state information (CSI), the proposed sum waiting time based scheduling (SWBS) algorithm can guarantee QoS requirements for both real-time (RT) and non-real-time (NRT) service. The benefit is attained from scheduling heterogeneous services based on sum packet waiting time to fulfill the QoS requirements and exploiting multiuser diversity to achieve effective resource utilization. Simulation results illustrate that the max packet loss ratio and packet delay for real-time service and the throughput for non-real-time service are improved by the proposed algorithm.
Keywords :
diversity reception; frequency division multiple access; quality of service; queueing theory; radio links; scheduling; QoS requirements; channel state information; downlink OFDMA system; heterogeneous services; max packet loss ratio; multiuser diversity; nonreal-time service; opportunistic scheduling; packet delay; queue state information; real-time service; resource utilization; sum waiting time based scheduling; Channel state information; Delay; Downlink; Mobile communication; Processor scheduling; Quality of service; Resource management; Scheduling algorithm; Throughput; Time division multiplexing; OFDMA; QoS; heterogeneous services; multiuser diversity; opportunistic scheduling;
Conference_Titel :
Communications and Mobile Computing, 2009. CMC '09. WRI International Conference on
Conference_Location :
Yunnan
Print_ISBN :
978-0-7695-3501-2
DOI :
10.1109/CMC.2009.30