利用组播及QoS技术对IPTV网络进行优化

Optimize IPTV network with multicast and QoS Technology

摘要:

主要阐述了有关IPTV网络业务、组播协议、Qos协议和OPNET网络仿真软件的有关基础知识,同时阐述了在业务承载网中的IPTV网络的发展现状,研究IPTV可能出现的网络传输拥塞时的缺点,提出基于组播和QoS技术的IPTV承载网络组网方案。重点阐述了OPNET的模型层次与构建方式,并提出了OPNET网络模拟仿真的具体步骤,通过OPNET软件进行模拟仿真实验,仿真中，按照数据业务、IP语音业务、IPTV服务等三个类型,分别对网络发射数量、终端接收数据流量、网络时延值和网络抖动数值等进行测试仿真,同时对所收集的网络状态信息进行数据分析。通过仿真实验，可以发现在IPTV网络中使用Qos及组播，有效减轻业务网的流量负荷,减少传输时延,提高网络系统稳定性,从而保证了相关服务的顺利进行。

Abstract:

This paper mainly expounds the basic knowledge of IPTV network service, multicast protocol, QoS protocol and OPNET Network simulation software, and expounds the development status of IPTV network in the service bearer network, studies the shortcomings of IPTV network transmission congestion that may occur, and proposes an IPTV bearer network networking scheme based on multicast and QoS Technology. This paper focuses on the model level and construction mode of OPNET, and puts forward the specific steps of OPNET Network simulation. The simulation experiment is carried out by OPNET software. In the simulation, according to the three types of data service, IP voice service and IPTV service, the network transmission quantity, terminal received data flow, network delay value and network jitter value are tested and simulated respectively, and the collected network state information is analyzed. Through the simulation experiment, it can be found that using QoS and multicast in IPTV network can effectively reduce the traffic load of the service network, reduce the transmission delay, improve the stability of the network system, and ensure the smooth progress of relevant services.