摘要： 信息化网络的高速发展对于网络的服务质量提出更高的要求，但目前国内缺少一套行之有效的服务质量监测系统来对IPTV网络质量进行评估，网络数据包的抓取与分析对于网络服务质量监测必不可少，而现有的网络服务质量监测系统是以解码器输出的数据作为网络数据进行分析，解码器对于流媒体数据的纠错会使得评估不准确。同时机顶盒作为IPTV的载体，内存和CPU的性能远不及PC，导致现有的PC抓包软件根本无法在机顶盒上运行。针对这一现状，基于用户体验质量的评估，考虑到IPTV上流媒体数据和各种控制协议的组合，采用状态机处理数据组合中的各种逻辑，计算丢包率、MDI指标、请求响应时延等参数供服务质量监测使用，并与传统网络服务质量监测进行实验对比，结果证明了监测系统的准确性。
关键词:
电信网络电视,
服务质量,
机顶盒,
网络抓包,
用户体验质量,
状态机
Abstract: As the rapid development of information technology, the Quality of Service(QoS) of the network must be better. But it is lack of a well-established service quality monitoring system to assess the quality of the IPTV network. The data packet’s capture and analysis for the QoS of the network monitoring is essential, and existing network monitoring system based on the decoder data flow which makes the assessment inaccurate. Set-top boxes, as the carrier of IPTV, whose memory and CPU performance is far less than the PC, the packet capture software on the PC cannot run on the set-top box. Based on the quality of experience, this paper designs set capture program running on the set-top box, uses the state machine to describe the logic between the data and the control information, and classifies data packets for IPTV on control information to calculate the packet loss rate, MDI, the request response time and other parameters for QoS of monitoring system. Compared with the traditional monitor system, the result proves the monitor system has accuracy.
Key words:
Internet Protocol Television(IPTV) of Telecom,
Quality of Service(QoS),
set-top box,
network packet capture,
quality of user experience,
state machine
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