OFDM中基于语音特性及分组长度的多业务调度  

Traffic-aware scheduling with packet length constraints in OFDM networks for heterogeneous services

作　　者：黄金日[1] 牛志升[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2009年第7期984-986,共3页Journal of Tsinghua University(Science and Technology)

基　　金：国家"九七三"重点基础研究项目(2007CB310607);中港联合基金项目(70731160631)

摘　　要：调度的目标是尽可能降低语音分组时延,同时最大化数据业务的总吞吐量。采用串行调度的方法:先进行语音调度,再进行数据调度。通过一个可调参数Vmax体现语音和数据业务在资源分配上的折衷。算法设计时考虑了可变分组长度给调度带来的影响与约束,提出了一种载波补偿方案以保证在每个调度帧内传输尽可能多的分组,并利用了语音业务特性。仿真结果表明:与Ahmed和Gkkw算法相比,该算法降低了语音分组时延。The scheduling objective in OFDM networks is to decrease the delay for voice packets while maximizing the total system data traffic throughput by using serial scheduling where the voice traffic is scheduled first and then data traffic. In this analysis the parameter Vmax is used to reflect the resource occupation tradeoff between voice and data traffic. The analysis also considers the impact of the packet length and exploits the voice traffic characteristics to improve the scheduling performance. Simulations show that this scheme outperforms existing Ahmed and Gkkw schemes in terms of average voice packet delay.

关 键 词：OFDM 分组调度 分组长度约束 语音特性 

分 类 号：TN915.05[电子电信—通信与信息系统] TN915.1[电子电信—信息与通信工程]