开放互联网环境下电信运营商视频业务技术演进策略

doi:10.11959/j.issn.1000-0801.2015093

Abstract

Abstract:

Video service is an important service for telecom operators.The advantages and disadvantages among IPTV,OTT TV and IPTV+OTT convergent architecture were compared,then the evolution direction of video service technology architecture of telecom operators was presented.Internet-1ike IPTV is either open and intelligent like OTT TV,or easy to operate and differentiated on service like IPTV.The evolution strategies of some key technologies,such as video codec,stream transportation,CDN,multicast,user interface,and end-to-end quality assurance,were proposed.

Key words: OTT TV, IPTV, content delivery network, video service

Qing Xiao,Siwei Wang. Tecbnology Evolution Strategy of Video Service Based on Open Internet[J]. Telecommunications Science, 2015, 31(4): 9-14.

机顶盒	Linux机顶盒
专网承载	直播频道采用全网多播方式，IPTV CDN提供点播内容的实时流媒体服务，媒体控制协议为RTSP（real time streaming protoco1，实时流传输协议），媒体传输协议为UDP（user data protoco1，用户数据报协议）或TCP（transmission control protoco1，传输控制协议）
专用CDN	CDN与EPG（electronic program guide，电子节目菜单）紧耦合，为专用CDN，共同构成IPTV能力平台
固定码流	H.264/CBR编码，标清1.3/2.5 Mbit/s，高清8/10 Mbit/s
质量保障	可实现端到端服务质量保障

机顶盒	智能机顶盒
双跨承载	IPTV业务由专网承载；OTT TV业务由公共互联网承载。通过机顶盒与家庭网关配合实现双跨方案（终端侧进行业务标签和路由选择的解决方案）
两套CDN	IPTV由专用CDN承载；OTT TV由互联网通用CDN承载
两套码流	IPTV视频采用固定码率码流；OTT TV视频采用H.264/VBR编码，标清平均码率为700 kbit/s～1.3 Mbit/s，高清平均码率为2.3～4 Mbit/s
质量保障	IPTV侧提供端到端服务质量保障；OTT TV侧无质量保障

	监测手段	保障措施
终端	预装测速客户端和QoS监测客户端	增加终端缓存容量；提供终端自诊断软件，提升用户自维护能力
平台	部署业务可用性拨测探针	终端侧与平台侧结合：完善HTTP自适应流传输机制；采用多码率自适应；网络有分组丢失时，应用层采用多TCP连接
承载网	部署业务可用性拨测探针	开放基于智能管道的动态提速能力；对于有高服务等级需求的用户，通过机顶盒与家庭网关配合实现双跨方案，提供IPTV专网和公共互联网的双跨承载
接入网		提供应用通道，解决带宽争用问题（通过应用通道访问合作内容商的服务器，保证通道的带宽，不与普通互联网接入业务争抢带宽）

	IPTV	OTT TV	互联网化IPTV
编解码技术	标清：1.3～2.5 Mbit/s；高清：8～12 Mbit/s；编码格式：H.264；码率控制方式：CBR	标清：700 kbit/s～1.3 Mbit/s；高清：2.3～4 Mbit/s；编码格式：H.264；码率控制方式：VBR	标清：700 kbit/s～1.3 Mbit/s；高清：2.3～6 Mbit/s；编码格式：H.264；码率控制方式：VBR/ABR（adaptive bit rate，自适应比特率）
流传输技术	直播：多播IGMP/UDP；点播：单播RTSP/UDP或 TCP	点播：单播 HTTP/TCP	直播：单播HTTP/TCP或多播 IGMP/UDP；点播：单播HTTP/TCP
组网结构	专网承载，不支持Wi-Fi接入	公共互联网承载，支持Wi-Fi接入	公共互联网承载（多播由专网承载），支持Wi-Fi接入
CDN	与IPTV平台紧耦合，只能为IPTV业务服务	采用业界通用CDN技术，内容分发、存储与业务逻辑分离	采用业界通用CDN技术，内容分发、存储与业务逻辑分离
终端	Linux机顶盒，少量智能机顶盒和智能电视一体机	智能机顶盒、智能电视一体机、手机、平板电脑	智能机顶盒、智能电视一体机、手机、平板电脑
质量保障措施	IPTV 通过建设专网来保障业务质量，终端和服务端之间没有纠错机制。要求每10 s分组丢失率＜0.1%	OTT TV 承载在尽力而为的互联网上，终端和服务端在应用层面适应网络的质量变化。可容忍＞10%的分组丢失率	网络层以双跨方案、智能管道（应用通道、动态提速）提供差异化的服务质量保障，终端和服务端再提供应用层的质量保障。可容忍＞10%的分组丢失率
用户体验	直播时延7s；频道切换1.5s；点播响应2s	无直播；点播响应2.5s	直播时延7s（多播）；直播时延30 s（单播HTTP）；频道切换1.5s；点播响应2.5s

1	Cisco VNI global IP traffic forecast,2013-2018. , 2014
2	施唯佳，蒋力，贾立鼎． OTT TV和IPTV的技术比较分析．电信科学， 2014,30（5）:15～19 Shi W J , Jiang L , Jia L D . Technique comparative analysis of OTT TV and IPTV. Telecommunications Science, 2014,30（5）: 15～19
3	胡冰松，黄小桑．一种安全的智能机顶盒实现方案．电信科学， 2013,29（4）:33～36 Hu B S , Huang X S . An implement scheme for secure STB. Telecommunications Science, 2013,29（4）: 33～36
4	翁颐，姚良，奚溪．基于单播流的IPTV频道切换提速方案研究．电信科学， 2014,30（9）:159～163 Weng Y , Yao L , Xi X . Research on a unicast-based IPTV channel change solution. Telecommunications Science, 2014,30（9）:159～163

Tecbnology Evolution Strategy of Video Service Based on Open Internet

RichHTML

PDF下载

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 8

References 4

Related Articles 15

Metrics

Recommended 0

[1]	Xiaomin TAN,Ai FANG,Bing LIANG,Haojie YANG. Locating causes of abnormality of EPG experience based on decision tree [J]. Telecommunications Science, 2019, 35(8): 158-164.
[2]	Xiaomin TAN,Ai FANG,Duo JIN,Changjiang LI. Automated anomaly detection of IPTV user experience [J]. Telecommunications Science, 2019, 35(7): 159-164.
[3]	Buhua CHEN,Ge CHEN,Jie LIANG. IPTV user’s on-demand behavior based on adaptive segmental stretched exponential model [J]. Telecommunications Science, 2018, 34(5): 148-154.
[4]	Feng LI,Chen YANG,Xingda LI. Key technologies and solutions of VR based on IPTV [J]. Telecommunications Science, 2018, 34(11): 119-125.
[5]	Jingxin SHEN. Research and application of DRM technology in IPTV UHD video [J]. Telecommunications Science, 2018, 34(11): 133-138.
[6]	Tiantian HE,Yankai LIU,Li SONG. Theory and practice of quality of experience in video services [J]. Telecommunications Science, 2017, 33(8): 67-76.
[7]	Gang ZHAO. Design and implementation of mobile video service quality analysis system [J]. Telecommunications Science, 2017, 33(7): 159-166.
[8]	Yingxia NIU,Xin HE. Development strategy of home broadband IPTV service [J]. Telecommunications Science, 2017, 33(4): 163-169.
[9]	Lili TANG,Ming NIE,Ning ZHANG. Impact of wired broadband services development on operators' IP network evolution [J]. Telecommunications Science, 2017, 33(4): 198-204.
[10]	Hongyong YU,Chenxu QIU,Jianfeng WEN. IPTV video personalized recommendation system [J]. Telecommunications Science, 2017, 33(12): 127-135.
[11]	Chuanfei LUO,Dehui KONG,Xiangkai LIU,Ke XU,Hao YANG. A business realization of VR panoramic video in smart home [J]. Telecommunications Science, 2017, 33(10): 185-193.
[12]	Minjuan WANG,Zhengpeng JI,Chao LV. A rules extraction algorithm for IPTV customers forecasting based on the forecasting entropy measurement [J]. Telecommunications Science, 2016, 32(5): 160-165.
[13]	Xin CAI,Yilong RUAN,Yirong SHI. Design and implement of IPTV content repository based on graph database [J]. Telecommunications Science, 2016, 32(12): 32-36.
[14]	Hongyong YU,Jianfeng WEN,Xin CAI,Chenxu QIU. Research and application of IPTV precision marketing based on big data [J]. Telecommunications Science, 2016, 32(12): 37-42.
[15]	Anda DEN,Deping XU,Linjie SUN,GLujing GEN,Xinning SHI,Xiang WAVG. Research and suggestion on the choice of the acceptance indexes of the TD-LTE VoLTE wireless network engineering [J]. Telecommunications Science, 2015, 31(Z1): 27-32.