多用户MIMO-OFDM系统基于QoE效用函数的跨层资源分配  

QoE utility function-based cross-layer resource allocation in multi-user MIMO-OFDM systems

作　　者：王大鸣[1] 陈松[1] 崔维嘉[1] 王强[1] 

机构地区：[1]解放军信息工程大学信息系统工程学院,河南郑州450002

出　　处：《通信学报》2014年第9期175-183,共9页Journal on Communications

基　　金：国家高技术发展计划("863"计划)基金资助项目(2012AA01A502;2012AA01A505)~~

摘　　要：对多用户MIMO-OFDM系统下行链路的资源分配问题进行了研究。依据实时(RT,real-time)和非实时(NRT,non real-time)业务的不同特点分别设计了QoE效用函数,并提出一种基于RT&NRT QoE效用函数的跨层资源分配算法。该算法利用所设计的效用函数计算用户分得资源所贡献的QoE增量,并根据由QoE增量确定的用户优先级完成时频资源块的分配,进而通过"拟注水"方式对功率分配进行优化。仿真结果表明,该算法相比已有算法在用户平均QoE、实时业务平均分组时延、非实时业务平均分组丢失率以及系统和吞吐量方面的性能均得到了明显改善。Resource allocation problem was investigated for downlink multi-user MIMO-OFDM systems.A QoE （quality of experience） utility function was given according to the characteristics of real-time （RT） and non real-time （NRT） services,and then a RT ＆ NRT QoE utility function-based cross-layer resource allocation algorithm was proposed.The algorithm firstly used the designed utility function to calculate the delta QoE,which was offered by users got resource.Secondly,it classified users according to their delta QoE and then allocated time-frequency blocks.Thirdly,it optimized the power allocation result by implementing pseudo water flooding power allocation.Simulation results show that compared with the existing algorithm,the proposed algorithm is better in the user average QoE,average packet delay to real time services,average packet lost rate to non real time services as well as sum throughput of system.

关 键 词：多用户 多入多出正交频分复用 资源分配 跨层 用户感受质量效用函数 

分 类 号：TN92[电子电信—通信与信息系统]