基于3D-Markov链的异构网络用户QoE分析方法

QoE analysis method for heterogeneous network user based on 3D-Markov chain

针对融合IEEE802.11ad的LTE-A异构网络中的用户接入体验质量(quality of experience,QoE)问题,本文通过引入接入竞争时间窗口函数,构造一种适用于异构网络用户接入退避行为的3DMarkov链模型,考虑不同业务类型用户体验质量,分析系统服务质量(quality of service,QoS),采用典型的平均意见得分(mean opinion score,MOS)评价方法映射得到用户Qo E性能指标.计算机仿真结果表明,在系统带宽一定情形下,融合IEEE802.11ad的LTE-A异构网络可以提高包括吞吐量、时延、丢包率等指标的系统QoS和包括MOS的用户QoE.

To address the problem of user access Qo E（quality of experience） in LTE-A heterogeneous networks integrating IEEE802.11 ad,this paper constructs a 3D-Markov chain model that can be applied to the user＇s access backoff behavior in a heterogeneous network by introducing the time function of an access contention window.The proposed model takes the users＇ Qo E of different types of service into consideration,analyzes the system Qo S（quality of service）,adopts a typical evaluation method MOS（mean opinion score）,and maps the performance indexes of Qo E.The simulation results show that the LTE-A heterogeneous network integrating IEEE802.11 ad can improve the system Qo S including throughput,time delay,packet-dropping rates,and the Qo E of user who contains MOS under the circumstance of certain system bandwidth.