基于OPNET的IPTV业务网络仿真与实现

IPTV业务体现了三网融合的要求。文中通过对IPTV业务及承载网络架构的研究,利用OPNET仿真软件对网络中jPTV的典型业务进行仿真,得出了网络模型中各主干链路流量的对比分析并讨论了流量差异化的原因,同时,给出了IPTV视频类业务和其它数据业务的流量分析。仿真结果表明,网络的设计方案是可行的,实现了IPTV的基本业务。     

电信运营商OTT TV业务网络建设探索

简述OTT TV(互联网电视)业务在国内外的发展情况,介绍电信运营商IPTV(交互式网络电视)业务网络现状和特点,分析OTT业务对网络建设的挑战和要求,提出电信运营商结合现有IPTV网络基础建设OTT TV业务网络的实现方案,重点论述内容注入、内容管理、网络承载、内容分发等几个重点问题的实现方式,从网络规划、建设的角度为电信运营商发展OTT业务提供借鉴思路。     

IPTV业务保障及其关键技术研究

IPTV是当前最热门技术领域之一,主要的电信服务提供商都在努力推出自己的IPTV业务。研究了IPTV业务保障问题及其重要意义,提出了从承载网络、内容传送及业务体验三个方面实现IPTV业务保障并分析了其中的关键技术。     

富媒体技术研究及在IPTV增值业务中的应用

本文介绍了富媒体技术在IPTV增值业务中的实现方案,并根据IPTV增值业务的场景需求,详细描述了三网融合下的新型业务展现方式和互动使用方式,并介绍了现有IPTV平台平滑改造升级,支持富媒体技术的建设思路和方案。     

思博伦三重播放测试方案为IPTV成功部署助力

在融合的环境中，在部署IPTV以及其他流媒体应用时，服务质量和性能测试显得更加重要。思博伦通信国际业务拓展经理Alan Way指出，在IPTV服务开通前，严格测试IPTV网络和服务器配置是成功实现IPTV服务部署的关键环节。因为用户在观看IPTV电视节目的同时，还可能有语音和数据的通信业务产生，IPTV对VoIP和Data业务的影响如何？     

IPTV增值业务及其实现技术探讨

本文首先介绍了什么是IPTV增值业务以及IPTV增值业务的分类,然后提出了IPTV增值业务平台的概念,对IPTV增值业务平台的结构和功能进行了描述,接着对IPTV增值业务实现中的关键技术进行探讨,最后提出了IPTV增值业务的分阶段发展建议.     

IPTV增值业务平台计费系统的研究

目前,IPTV业务正逐渐走向实际运营阶段.成为电信运营商的主流宽带业务.文章主要介绍了IPTv增值业务平台计费系统的构成.描述了IPTV业务运营平台与电信B0SS系统和SP系统之间的接口.分析了系统接口间的信息同步实现方式.讨论了IPTV计费系统的计费方式.     

IPTV消息业务的实现和发展趋势

消息业务作为一种IPTV增值业务,实现了应用与用户之间、用户与用户之间的消息交互.本文首先分析了IPTV消息业务的使用场景,进而重点介绍了IPTV消息系统的架构和消息业务的实现流程,并深入探讨了接口协议和功能要求等方面的技术实现,并就未来IPTV消息业务向融合类消息业务的发展趋势进行了探讨.     

有线运营商如何面对来自IPTV的竞争

IPTV是指通过IP协议传输的视频流，可分为两种，一种是基于可管理的电信网络上的IPTV．另外一种是基于互联网的IPTV。目前，IPTV在北美、欧洲、亚洲等地都有商业应用．如：意大利的FastWeb公司在2001年就已开始IPTV业务，在85个社区发展了16万用户．以FTTN＋ADSL方式实现．用户可以灵活地选择语音、数据、视频业务的捆绑服务；香港的电信盈科与FastWeb公司的方式基本一样，现在拥有50万IPTV用户，是目前世界上最大的IPTV运营商：加拿大的MTS公司现在有5万IPTV用户．这些用户居住要分散一些．以FTTH＋VDSL方式实现，能提供高清电视：美国的SureWest公司也已开展IPTV业务．以FTTH＋ADSL2方式实现。     

IPTV业务管理系统体系架构探讨

IPTV业务是一类综合性的、多元化的业务，为适应将来业务和网络的发展，IPTV业务管理系统应该以业务和客户为中心，具有好的自适应能力；系统内部流程应该是模块化结构．有良好的集成性和自动化要求。本文对IPTV业务管理系统的体系架构进行了描述，探讨了IPTV业务管理系统的管理对象，简单介绍了IPTV业务管理系统的功能。为了充分利用现有的运营支撑系统的能力，实现业务管理系统与运营支撑系统和运维系统的对接，     

基于分层聚类分析的IPTV业务质量研究与应用

IPTV是基于IP协议的视频业务,与互联网数据业务对网络质量的要求存在很多不同,对网络带宽、QoS性能、可靠性及时延性等方面都要求更高。随着IPTV业务的推广发展和用户对业务质量要求的提高,IPTV业务质量保障变得越来越重要。因此,介绍IPTV网络承载技术,分析IPTV业务质量保障现状及不足,结合SQM系统提出了一种基于分层聚类分析的IPTV业务质量优化方案。     

Improving IPTV Forwarding Mechanism in IEEE 802.16j MMR Networks Based on Aggregation

Internet protocol television (IPTV) service depends on the network quality of service (QoS) and bandwidth of the broadband service provider. IEEE 802.16j mobile multihop relay Worldwide Interoperability for Microwave Access networks have the opportunity to offer high bandwidth capacity by introducing relay stations. However, to actually satisfy QoS requirements for offering IPTV services (HDTV, SDTV, Web TV, and mobile TV) for heterogeneous users' requests, providers must use a video server for each IPTV service type, which increases the network load, especially bandwidth consumption and forwarding time. In this paper, we present a solution for forwarding IPTV video streaming to diverse subscribers via an 802.16j broadband wireless access network. In particular, we propose a new multicast tree construction and aggregation mechanism based on the unique property of prime numbers. Performance evaluation results show that the proposed scheme reduces both bandwidth consumption and forwarding time.     

IPTV主要技术的发展趋势

快速发展的IPTV业务成为中国信息领域的一个焦点，但经过长时间在中国多个城市的试验后其业务模型依然没有完全成熟。因此如何选择合适技术的问题成为一个短时期难以回答的问题。由于目前中国已经开展试验的IPTV业务主要是对本地的小批量用户播放电视和录像节目，采用的技术只能作为一种尝试而很难成为今后IPTV技术发展的范例，因此有必要从最终构建全国性的能满足商用运营需求的IPTV业务网络的角度出发。在全国性IPTV网络架构的设计、承载网的改造、视频编码的选择、终端的结构、内容分发网络的构建、开放DRM平台的建立和媒体资产管理系统的建设等几个主要方面开展研究。     

Capacity analysis of MediaGrid: a P2P IPTV platform for fiber to the node (FTTN) networks

This paper studies the conditions under which P2P sharing can increase the capacity of IPTV services over FTTN networks. For a typical FTTN network, our study shows a) P2P sharing is not beneficial when the total traffic in a local video office is low; b) P2P sharing increases the load on FTTN switches and routers in local video offices; c) P2P sharing is the most beneficial when the network bottleneck is experienced in the southbound segment of a local video office (equivalently a northbound segment of an FTTN switch); and d) sharing among all FTTN serving communities is not needed when network congestion problems are solved by using some other technologies such as program pre-caching or replication. Based on the analytical results, design for IPTV services which monitors FTTN network conditions and decides when and how to share videos among peers to maximize the service capacity. Simulations and bounds both validate the potential benefits of the MediaGrid IPTV service platform     

FEC/FCC技术在运营商网络中的应用研究

通过对视频业务现状和业务质量的分析,结合FEC和FCC技术的特点,以IPTV业务为例,阐述了FEC和FCC技术在江苏电信业务网络中的应用。通过开展实验室测试和现网试点,证明FEC和FCC技术可显著提升IPTV业务使用感知。     

浅谈IPTV技术

IPTV是一种最新流行的、以“电视机+机顶盒”为主要终端设备、能为用户提供互动多媒体服务的宽带增值业务,它为我国广大电视用户提供了全新的宽带体验方式。IPTV技术是一项系统技术,包括多方面的内容,文章主要介绍了IPTV技术中的音视频编解码、流媒体传送、宽带接入网络、IP机顶盒等技术。     

An Architecture for Service Quality Management Using Cooperative Communications

The rapid enhancement and explosive expansion of mobile communication systems will lead to an increased demand for multimedia services. Various multimedia contents will be available due to the proliferation of IPTV, video on demand, user-generated content, and content-centric networking. Therefore, multimedia service quality is becoming a critical issue. The static allocation of network resources may not be sufficient to guarantee the required service quality of multimedia in wireless networks. For ensuring the service quality, it is important to manage the resources considering the overall performance of the network and the end system. In particular, a certain level of service quality should be maintained regardless of the network situation. To achieve this objective, we first propose an architecture for service quality management and then present a detailed framework and mechanisms to maintain the desired service quality using the cooperation between communication entities in wireless networks. Simulation results are also presented to show that the proposed framework works well in wireless networks.     

IPTV Systems, Standards and Architectures: Part II - IPTV Architectures for Cable Systems: An Evolutionary Approach

IPTV systems are beginning to be deployed by telcos, to compete with cable and other television service providers. While cable network spectral bandwidths are larger than their wireline equivalents, bandwidth-consuming services such as HDTV are quickly filling this spectrum, prompting cable operators to consider video switching options as a means to increase programming capacity. This article examines the cable video network architecture, and in particular new emerging technologies that can provide cable networks with the means to transition to an IPTV architecture.     

Resource Management and QoS Provisioning for IPTV over mmWave-based WPANs with Directional Antenna

There is an increasing interest in 60 GHz millimeter-wave (mmWave) communication technologies for multi-Gigabit wireless personal area networks (WPAN), aiming to support broadband multimedia applications. Internet Protocol TV (IPTV) is an emerging killer application which requires high data rate and stringent quality of services (QoS) in terms of delay and packet loss. In this paper, we propose a method to efficiently support high definition video flows in a mmWave-based WPAN with QoS guarantee, considering the characteristics of both the IPTV traffic and the mmWave communication technology. We first quantify the effective bandwidth of IPTV video sources using a simple, two-level Markov traffic model. Considering the overheads of the protocol stack in mmWave WPANs, we then quantify the minimum channel time needed for each IPTV flow. Since mmWave-based WPANs will deploy directional antennas to not only extend the transmission range, but also reduce the interference level to neighboring flows, we further propose an admission control scheme and scheduling algorithm to improve the network resource utilization by taking advantage of concurrent transmissions. Extensive simulations with NS-2 using real video traces have validated our analysis and demonstrated the efficiency and effectiveness of the proposed schemes, which will be an enabling technology for future mmWave-based WPANs supporting IPTV services. Part of this work was presented at 2008 Int. Conf. Heterogeneous Networking for Quality, Reliability, Security and Robustness (QShine’08), Hong Kong, July 2008. This work has been supported by research grants from the Natural Sciences and Engineering Research Council (NSERC) of Canada.