面向QoE的LTE网络流媒体业务半实物仿真平台

QoE-oriented HIL Simulation Platform for Mobile Streaming in LTE System

移动流媒体业务是未来LTE网络下的主要数据业务,LTE网络下流媒体业务的用户体验质量(QoE,Quality of Experience)评估是目前的研究热点。实际网络下的QoE主观评估费时费力,且无法实现实时评测,在实验室环境下进行流媒体业务的仿真和QoE评估,将大大简化QoE评测过程,有效提高针对流媒体业务QoE的研究效率,但目前面向QoE的实时仿真和评估平台的研究还比较少。针对这一问题,提出了一种LTE网络下移动流媒体业务的半实物仿真方法,主要研究了NS-3仿真网络与物理节点的连接方法,实现了流媒体业务的仿真和QoE实时评估,仿真分析了LTE仿真网络参数对流媒体业务QoE的影响。所提出的LTE网络半实物仿真及评估平台实时性较好,网络性能接近实际情况,能够为LTE网络相关的研究提供一定的便利。

The streaming service will be one of the most important services of LTE wireless network in the future. Researches on quality of experience （QoE） measurement of streaming in LTE system become a hot topic nowadays. Subjective measurement in real network will cost enormous human resource and time, and the process of measurement can＇t be real-time. QoE evaluating on the simulation platform of mobile streaming can be very simple and effective. However, there are few related researches on real-time simulation and QoE evaluating platform. A hardware-in-the-loop simulating platform based on NS-3 was established. Based on this platform, a real-time QoE measuring method was discussed and a video quality monitoring software was used to measure the streaming quality on the client. The most contribution is the communication scheme between simulation network and the hardware. Simulation of streaming service and QoE measurement were applied on this platform. This platform has good consistency with real network conditions, thus can be used to implement LTE concerned researches.