基于SOA的CAS前端研究与实现
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摘要
电视数字化是电视发展史上又一次重大的技术革命。数字电视不但是一个由标准、设备和节目源等多个部分相互支持和匹配的技术系统,而且将对相关行业产生影响并促进其发展。它给观众带来了主动接收的方式;给接收设备提供商带来了发展机遇;给有线电视网络和卫星电视带来了新的业务和机会。而这一切都依赖于一个先决条件:一个灵活、高效功能强大的条件访问系统(CAS)。
本文在全面研究了CAS相关标准和基本原理、CAS复用机制、CAS构成、CAS通用加扰算法的基础上,结合对面向服务的架构(SOA)的研究、实现SOA的相关技术的研究、SOA生命周期的研究、SOA逻辑架构模型的研究和WSIF的研究,实现了一个基于SOA的CAS前端。提出并实现了高效服务流水线加扰,解决了软件加扰的速度瓶颈问题,实现了高效灵活的CAS前端。CAS其它部分代之以运营支撑系统(BOSS)框架,这样可以保证满足数字电视频道和节目管理及其它增值业务的管理和运营需求。由于SOA本身的高灵活性、业务敏捷性和高可靠性,加上高效服务流水线加扰的实现,该CAS前端是一个能够适应复杂环境并且是灵活高效的CAS前端,与目前存在的CAS系统相比,明显具有更高的灵活性和更好的业务敏捷性。
对软件原型测试表明,整个CAS前端包括高效服务流水线加扰能够正常工作,在负载流量超过4M时能稳定工作。没有解扰授权的用户可以收到加扰后的视频流数据,但不能正常收看视频流节目。虽然只是原型测试没有布署到试点前端进行长时间和实际运行测试,也没有进行大规模测试和极限测试,但所表现出来的灵活性、业务敏捷性和很高的加扰速度和加扰稳定性己经超过了目前存在的同类产品。
The digitalization of TV is another great technology innovation in the history of TV development. Digital TV is a technology system involving standards, equipments and program sources, etc. These parts support and adapt to each other, it will affect and promote the development of related industries. Digital TV brings a voluntary manner to the customs, development chances to the receiving device dealers, and new business and opportunity to the CATV and Satellite TV dealers. All of the above depend on one precondition, a flexible CAS with high efficiency and power force.
In this article, the author make the research of the standards, the basic principles, the mechanism of reusability, the structure of CAS, the common scrambling arithmetic. After that, the author research the architecture of SOA, the related technology about the implementation of SOA, the lifecycle of SOA, the model of logical architecture of SOA and WSIF. Then a CAS Head-end based on SOA is implemented. Presented the arithmetic of service-pipeline scrambling ,and implemented it .By useing this method ,the bottle-neck of speed caused by general scrambling system which is implemented as a software is overcome. As for the high flexibility, reliability and the implementation of parallel scrambling service module, the CAS Head-end can adapt complex environment, it is a flexible CAS Head-end with high efficiency.
Indicated from the software prototype test, the entire CAS Head-end, which including the highly effective service-pipeline scrambling, can the work normally. And can word stably when band width is 4M.The users without unscrambling authorition can receive only scrambling vidio stream, which could not get the right programe. Althought it is just a prototype test and without any long term, real time,big scale and extremly tests. But its agility,business celerity,high speed scrambling and scrambling stability has already exceed many other present products.
本文在全面研究了CAS相关标准和基本原理、CAS复用机制、CAS构成、CAS通用加扰算法的基础上,结合对面向服务的架构(SOA)的研究、实现SOA的相关技术的研究、SOA生命周期的研究、SOA逻辑架构模型的研究和WSIF的研究,实现了一个基于SOA的CAS前端。提出并实现了高效服务流水线加扰,解决了软件加扰的速度瓶颈问题,实现了高效灵活的CAS前端。CAS其它部分代之以运营支撑系统(BOSS)框架,这样可以保证满足数字电视频道和节目管理及其它增值业务的管理和运营需求。由于SOA本身的高灵活性、业务敏捷性和高可靠性,加上高效服务流水线加扰的实现,该CAS前端是一个能够适应复杂环境并且是灵活高效的CAS前端,与目前存在的CAS系统相比,明显具有更高的灵活性和更好的业务敏捷性。
对软件原型测试表明,整个CAS前端包括高效服务流水线加扰能够正常工作,在负载流量超过4M时能稳定工作。没有解扰授权的用户可以收到加扰后的视频流数据,但不能正常收看视频流节目。虽然只是原型测试没有布署到试点前端进行长时间和实际运行测试,也没有进行大规模测试和极限测试,但所表现出来的灵活性、业务敏捷性和很高的加扰速度和加扰稳定性己经超过了目前存在的同类产品。
The digitalization of TV is another great technology innovation in the history of TV development. Digital TV is a technology system involving standards, equipments and program sources, etc. These parts support and adapt to each other, it will affect and promote the development of related industries. Digital TV brings a voluntary manner to the customs, development chances to the receiving device dealers, and new business and opportunity to the CATV and Satellite TV dealers. All of the above depend on one precondition, a flexible CAS with high efficiency and power force.
In this article, the author make the research of the standards, the basic principles, the mechanism of reusability, the structure of CAS, the common scrambling arithmetic. After that, the author research the architecture of SOA, the related technology about the implementation of SOA, the lifecycle of SOA, the model of logical architecture of SOA and WSIF. Then a CAS Head-end based on SOA is implemented. Presented the arithmetic of service-pipeline scrambling ,and implemented it .By useing this method ,the bottle-neck of speed caused by general scrambling system which is implemented as a software is overcome. As for the high flexibility, reliability and the implementation of parallel scrambling service module, the CAS Head-end can adapt complex environment, it is a flexible CAS Head-end with high efficiency.
Indicated from the software prototype test, the entire CAS Head-end, which including the highly effective service-pipeline scrambling, can the work normally. And can word stably when band width is 4M.The users without unscrambling authorition can receive only scrambling vidio stream, which could not get the right programe. Althought it is just a prototype test and without any long term, real time,big scale and extremly tests. But its agility,business celerity,high speed scrambling and scrambling stability has already exceed many other present products.
引文
[1] 中国投资咨询网.2006 年中国数字电视产业分析及投资咨询报告.2006,1:1-5
[2] 袁玉良,刘玉贵.DVB 数字电视传输流生成和复用技术及实现.计算机应用.2005,1: 132-134
[3] Rob High, Jr , Stephen Kinder , Steve Graham .IBM’s SOA Foundation An Architectural Introduction and Overview Version 1.0.2005.11: 12-55
[4] 中国电信集团公司.新一代电信运营支撑系统(NGOSS)研究与系统设计. 2004,6:26-65
[5] 陈田明 . 美欧数字电视制式比较及中国数字电视展望 . 深圳大学学报(理工版).2003,6:42-48
[6] 郝 亚 斌 . 中 国 数 字 电 视 市 场 展 望 . 中 国 数 字 电 视 与 机 顶 盒 技 术 研 讨 会DTVChina .2005,4:1-8
[7] 姜秀华.数字电视原理与应用.北京:人民邮电出版社.2003,9:37-86
[8] 国家广播电视总局.GY/Z-175-2001,数字电视广播条件接收系统规范(讨论稿).2001 年
[9] ETSLTS 103 197: Digital Video Broadcasting (DVB),Head-end implementation of DVB SimulCrypt.2003 年
[10] ISO/IEC. International Standard 13818-1: Generic Coding of Moving Pictures and Associated Audio Information: Systems. 1996,7
[11] Oded Goldreich. 密码学基础(英文版). 以色列. 北京 :电子工业出版社.2001,10: 41-66
[12] Ralf-Philipp Weinmann, Kai Wirt.Analysis of the DVB Common Scrambling Algorithm. Communications and Multimedia Security, Proceedings of the 8th IFIP TC-6 TC-11 Conference on Communications and Multimedia Security, 2004
[13] 国家广播电视总局.GY/Z 174-2001.数字电视广播业务信息规范.2001 年
[14] 冯传岗.数字电视的条件接收系统.现代电视技术.2003,2: 55-62
[15] O'Reilly 编 .Java Web Services in a Nutshell., O'Reilly. 2003.5:48-54
[16] 飞思科技产品研发中心编.JAVA WEB 服务应用开发详解 . 北京: 电子工业出版社.2002:38-492
[17] 吴建斌,吴家铸,王芳,熊仕平.Web Services 平台体系结构的研究. 计算机工程与科学. 2005,10:22-24,27
[18] W3C WSDL 2.0 [EB/OL]. http://www.w3.org/2002/ws/desc/.2004,3:12-32
[19] UDDI ORG. UDDI3.0 [EB/OL]. http://uddi.org/pubs/uddi_v3.htm.2003,10:2-19
[20] Sonic Software Corporation.AN ARCHITECTURE AND LIFECYCLE DEFINITION.SONIC ESB white paper,2005,3:4-53
[21] IBM,Microsoft .WebServices Security (WS-Security) [EB/OL] .http:// www-106.ibm.com/ developerworks /webservices /library/ws-secure/.2002.4
[22] Pazarci, Melih, Dipcin, Vadi. A MPEG2-transparent scrambling technique. IEEE Transactions on Consumer Electronics. 2002,4: 345-355
[23] Wang Ci, Yu Hong-Bin,Zheng Meng. A DCT-based MPEG-2 transparent scrambling algorithm. IEEE Transactions on Consumer Electronics.2003,11 :1208-1213
[24] Design Patterns for SOA .Bill Schneider:2-11
[25] W3C Webservices Architecture [EB/OL] .http://www.w3.org/TR/2004/NOTE-ws-arch– 20040211/. 2004,2: 7-21
[26] White Paper: WebServices and PKI: The How and Why Layer 7 Technologies, Inc.
[27] 白敏丹.多功能机顶盒的技术分析.北京广播学院学报(自然科学版). 2004.11:2.
[28] 胡铭,范译宇.基于线性反馈移位寄存器和 CSA 算法的 CA 系统加扰模块设计,中国有线电视. 2006, No.9:859-861
[29] ETSI.TS 101 197: Digital Video Broadcasting (DVB); DVB SimulCrypt; Head-end architecture and synchronization. 2002
[30] 童廷洋,李斌,杨会平,宁焕生.数字条件接收的多层密钥系统.计算机工程与应用. 2004,8 :154-156,164
[31] Jesper Joergensen|dev2dev|. BPM and SOA - Distinct, but Synergistic.2006,7
[32] Thomas Erl. The top 5 SOA adoption pitfalls .2006,6
[33] Willian Stallings,Prentice Hall ,Operation System Internals and Design Jprinciple(Third Edition),1992:321-348
[34] 孙强南,孙昱东编著.计算机系统结构(第二版). 北京:科学出版社. 2000:113-184
[35] Sung-Kwan Kim, Rhan Ha, Sang Lyul Min .Analysis of the impacts of overestimation sources on the accuracy of worst case timing analysis. Real-Time Systems Symposium, 1999. Proceedings. The 20th IEEE 1-3. 1999,12:22 - 31
[2] 袁玉良,刘玉贵.DVB 数字电视传输流生成和复用技术及实现.计算机应用.2005,1: 132-134
[3] Rob High, Jr , Stephen Kinder , Steve Graham .IBM’s SOA Foundation An Architectural Introduction and Overview Version 1.0.2005.11: 12-55
[4] 中国电信集团公司.新一代电信运营支撑系统(NGOSS)研究与系统设计. 2004,6:26-65
[5] 陈田明 . 美欧数字电视制式比较及中国数字电视展望 . 深圳大学学报(理工版).2003,6:42-48
[6] 郝 亚 斌 . 中 国 数 字 电 视 市 场 展 望 . 中 国 数 字 电 视 与 机 顶 盒 技 术 研 讨 会DTVChina .2005,4:1-8
[7] 姜秀华.数字电视原理与应用.北京:人民邮电出版社.2003,9:37-86
[8] 国家广播电视总局.GY/Z-175-2001,数字电视广播条件接收系统规范(讨论稿).2001 年
[9] ETSLTS 103 197: Digital Video Broadcasting (DVB),Head-end implementation of DVB SimulCrypt.2003 年
[10] ISO/IEC. International Standard 13818-1: Generic Coding of Moving Pictures and Associated Audio Information: Systems. 1996,7
[11] Oded Goldreich. 密码学基础(英文版). 以色列. 北京 :电子工业出版社.2001,10: 41-66
[12] Ralf-Philipp Weinmann, Kai Wirt.Analysis of the DVB Common Scrambling Algorithm. Communications and Multimedia Security, Proceedings of the 8th IFIP TC-6 TC-11 Conference on Communications and Multimedia Security, 2004
[13] 国家广播电视总局.GY/Z 174-2001.数字电视广播业务信息规范.2001 年
[14] 冯传岗.数字电视的条件接收系统.现代电视技术.2003,2: 55-62
[15] O'Reilly 编 .Java Web Services in a Nutshell., O'Reilly. 2003.5:48-54
[16] 飞思科技产品研发中心编.JAVA WEB 服务应用开发详解 . 北京: 电子工业出版社.2002:38-492
[17] 吴建斌,吴家铸,王芳,熊仕平.Web Services 平台体系结构的研究. 计算机工程与科学. 2005,10:22-24,27
[18] W3C WSDL 2.0 [EB/OL]. http://www.w3.org/2002/ws/desc/.2004,3:12-32
[19] UDDI ORG. UDDI3.0 [EB/OL]. http://uddi.org/pubs/uddi_v3.htm.2003,10:2-19
[20] Sonic Software Corporation.AN ARCHITECTURE AND LIFECYCLE DEFINITION.SONIC ESB white paper,2005,3:4-53
[21] IBM,Microsoft .WebServices Security (WS-Security) [EB/OL] .http:// www-106.ibm.com/ developerworks /webservices /library/ws-secure/.2002.4
[22] Pazarci, Melih, Dipcin, Vadi. A MPEG2-transparent scrambling technique. IEEE Transactions on Consumer Electronics. 2002,4: 345-355
[23] Wang Ci, Yu Hong-Bin,Zheng Meng. A DCT-based MPEG-2 transparent scrambling algorithm. IEEE Transactions on Consumer Electronics.2003,11 :1208-1213
[24] Design Patterns for SOA .Bill Schneider:2-11
[25] W3C Webservices Architecture [EB/OL] .http://www.w3.org/TR/2004/NOTE-ws-arch– 20040211/. 2004,2: 7-21
[26] White Paper: WebServices and PKI: The How and Why Layer 7 Technologies, Inc.
[27] 白敏丹.多功能机顶盒的技术分析.北京广播学院学报(自然科学版). 2004.11:2.
[28] 胡铭,范译宇.基于线性反馈移位寄存器和 CSA 算法的 CA 系统加扰模块设计,中国有线电视. 2006, No.9:859-861
[29] ETSI.TS 101 197: Digital Video Broadcasting (DVB); DVB SimulCrypt; Head-end architecture and synchronization. 2002
[30] 童廷洋,李斌,杨会平,宁焕生.数字条件接收的多层密钥系统.计算机工程与应用. 2004,8 :154-156,164
[31] Jesper Joergensen|dev2dev|. BPM and SOA - Distinct, but Synergistic.2006,7
[32] Thomas Erl. The top 5 SOA adoption pitfalls .2006,6
[33] Willian Stallings,Prentice Hall ,Operation System Internals and Design Jprinciple(Third Edition),1992:321-348
[34] 孙强南,孙昱东编著.计算机系统结构(第二版). 北京:科学出版社. 2000:113-184
[35] Sung-Kwan Kim, Rhan Ha, Sang Lyul Min .Analysis of the impacts of overestimation sources on the accuracy of worst case timing analysis. Real-Time Systems Symposium, 1999. Proceedings. The 20th IEEE 1-3. 1999,12:22 - 31