Hierarchical Opportunistic Scheduling in Multi-Service OFDMA Networks

摘要：

A novel hierarchy scheduling mechanism is proposed for opportunistic scheduling in multi-service OFDMA network, where the services consist of delay-sensitive (DS) services and delay-insensitive (DIS) services. To implement opportunistic scheduling (OS), we design a hybrid QoS mechanism based on the channel condition feedback from each Mobile Station. In the MAC layer, scheduler performs hierarchically. First, it will dynamically assign the necessary subcarriers to guarantee the minimal reserved traffic rate and latency requirement for DS services. Second, a utility function is employed to achieve efficient bandwidth utilization for both unmet DS services and DIS services, exploiting multi-user diversity with fairness consideration. The simulation results explicitly verify our expectation that the proposed mechanism can meet the throughput requirements without compromising latency and fairness among services with diverse QoS requirements.

关键词： OFDMA opportunistic scheduling multi-service utility

作者: Wenbo Xu Yun Tian Jiaru Lin Weiling Wu

作者单位: Department of Information Engineering Beijing University of Posts and Telecommunications Beijing, China

会议类型: 国际会议

会议名称: 第三届IEEE无线通讯、网络技术暨移动计算国际会议

会议地点: 上海

会议语种:英文

在线出版日期: 2007-09-21（万方平台首次上网日期，不代表论文的发表时间）