OFDM中继系统中保证混合业务QoS的研究

doi:10.3969/j.issn.0255-8297.2014.01.003

应用科学学报 ›› 2014, Vol. 32 ›› Issue (1): 13-18.doi: 10.3969/j.issn.0255-8297.2014.01.003

OFDM中继系统中保证混合业务QoS的研究

戴翠琴，王亮，王海宝

重庆邮电大学移动通信技术重庆市重点实验室，重庆400065

收稿日期:2012-10-29 修回日期:2013-06-03 出版日期:2014-01-31 发布日期:2013-06-03
作者简介:戴翠琴，副教授，研究方向：宽带无线移动通信网络关键技术，E-mail：daicq@cqupt.edu.cn
基金资助:
国家自然科学基金(No. 61171111)；重庆市自然科学基金(No. cstc2012jjA40042)；重庆市科委重点实验室专项经费(No. D2011
-24)；重庆市自然科学重点基金(No.cstc2013jjB40001)；重庆市教委优秀成果转化项目基金(No. Kjzh11206)资助

QoS Guarantee for Mixed-Service in OFDM Relay System

DAI Cui-qin, WANG Liang, WANG Hai-bao

Chongqing Key Laboratory of Mobile Communications Technology, Chongqing University of Posts and Telecommunication, Chongqing 400065, China

Received:2012-10-29 Revised:2013-06-03 Online:2014-01-31 Published:2013-06-03

摘要/Abstract

摘要： 为保证正交频分复用中继系统中混合业务的QoS要求，提出相对最长队列优先/相对比例公平的调度算法R-LQAF/RPF. 根据实时用户的速率需求引入相对变化函数，并利用RPF算法提高实时业务用户的吞吐量.同时根据用户队列长度和系统队列长的关系，采用R-LQAF算法降低用户丢包率，保证了非实时用户的QoS满意
度. 仿真结果表明，与比例公平和最大加权时延优先算法相比较，R-LQAF/RPF算法不仅能针对不同业务采取不同的调度策略，而且对用户吞吐量、速率需求满意度、丢包率性能均有所提升，充分保证了混合业务的QoS要求.

关键词: 正交频分复用, 中继, 调度, 丢包率, 吞吐量

Abstract: To ensure QoS requirements for mixed-service in an orthogonal frequency division multiplexing relay system, we propose a relative largest queue aware first/relative proportional fair (R-LQAF/RPF) scheduling algorithm. By setting a relative variation function, we use an RPF scheduling algorithm to enhance the
realtime user throughput to meet the actual user rate requirements. We also use an R-LQAF scheduling algorithm to improve the scheduling performance, decrease the packet loss rate, and ensure QoS requirements for non-realtime user according to the relationship of the user queue length and the system queue length.Simulation results show that, compared with the existing proportional fair and the largest weighted delay first algorithm, the R-LQAF/RPF algorithm can flexibly choose different scheduling strategies for different businesses, effectively improve user performances in terms of throughput, packet loss rate, and satisfaction of demanded rate, and guarantee QoS requirements of mixed businesses.

Key words: orthogonal frequency division multiple (OFDM), relay, scheduling, packet loss rate, throughput

中图分类号:

TN929.5

戴翠琴，王亮，王海宝. OFDM中继系统中保证混合业务QoS的研究[J]. 应用科学学报, 2014, 32(1): 13-18.

DAI Cui-qin, WANG Liang, WANG Hai-bao. QoS Guarantee for Mixed-Service in OFDM Relay System[J]. Journal of Applied Sciences, 2014, 32(1): 13-18.

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OFDM中继系统中保证混合业务QoS的研究

QoS Guarantee for Mixed-Service in OFDM Relay System

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