分布式业务网络支撑技术研究
摘要
IP多媒体子系统(IMS)被认为是下一代网络的核心技术,是解决固网和移动融合、多媒体业务整合的重要途径。但IMS业务支撑能力不灵活,功能实体多,系统结构复杂等问题制约了它的普及,面临着来自互联网业务的严重挑战,甚至在某些领域已经被替代。而互联网业务受到安全等问题的制约。因此,提出了结合P2P和IMS特点的分布式业务网络作为电信业务和互联网业务提供统一的、安全的、灵活的业务支撑平台,它成为了下一代网络的重要演进方向。其中,互联网业务特征实现机制、分布式业务网络的架构、节点功能结构都被作为重要的支撑技术被列入了研究范畴之中。本文将这些研究点分为以下两个部分进行研究。
第一部分从互联网业务特征实现机制和网络架构、功能节点结构等方面入手。根据业务的不同特点能够提供不同业务支撑模式,并设计功能节点和主要业务实现流程。第二部分在业务实现的基础上进一步优化作为核心网结构。已经提出的分布式IMS多采用平面化的网络结构存在着互联互通和消息开销问题需要解决。
本文遵循以业务支撑为基本出发点,在此基础上进一步优化系统结构的思路取得了一下创新性成果：将分布式IMS作为核心网,遵循P2P和IMS融合的思想设计网络结构和节点功能,提供多种灵活的业务支撑模式；针对VoIP和流媒体提出了各自的解决方案；项目中遇到的问题针对移动设备和P2P的NAT穿越提出了各自的解决方案,并在项目开发中对方案可行性进行验证；将等级化和Co-location预处理机制引入分布式IMS,减少消息开销提高系统可靠性。
The IP Multimedia Subsystem is seen as the core technology of NGN (Next Generation Network). IMS is considered as an important way to solve the fixed-mobile network convergence and the combination of multimedia services. But on the other hand, The IMS also has some problems that constrain its popularity, such as the inflexible capability of supporting new service, the excessive fuctional entities, complex system structure. IMS is facing challenges from the Internet technology. In some area, it has already been replaced. The Internet service itself constrained by security issues. As a result, distributed service network (DSN),which combines the advantages of P2P and IMS, provide a unified, secure and flexible support platform that support telecommunications and internet services at the meantime. It will be an important evolutionary direction of NGN. The implementation mechanisms of the Internet service, the distributed service network architecture, function node structure are researched as important supporting technologies. This article divides these research points to the following two parts.
The first part begins with the implementation mechanism of the internet service and the node function structure. Different supprot models are provided according to the different characteristics of the service, and the function nodes and the main service implementation process are also desighed.The second part optimizes the distributed IMS architecture which plays as the core of DSN. The architecture of exsiting distributed IMS is plane.It has interconnection and message overhead problems to resolve.
This article makes service supporting as the basic point and optimize the system structure based on this point, and achieved the following innovation:Making the distributed IMS as the core network of DSN, designing the network architecture and node structure based on the thought of the integration of P2P and IMS,providing multiple flexible service support capability; Proposing solutions aimed at VoIP and streaming media; As for the problems discovered during the program,the article proposes solutions of weak capacity of Mobile device and the NAT Traversal of P2P overlay and the feasibility of the solutions is been tested in the program;Introducing a hierarchical and Co-location mechanism to the distributed IMS.In this way, the message overhead is reduced and the system reliability is promoted.
第一部分从互联网业务特征实现机制和网络架构、功能节点结构等方面入手。根据业务的不同特点能够提供不同业务支撑模式,并设计功能节点和主要业务实现流程。第二部分在业务实现的基础上进一步优化作为核心网结构。已经提出的分布式IMS多采用平面化的网络结构存在着互联互通和消息开销问题需要解决。
本文遵循以业务支撑为基本出发点,在此基础上进一步优化系统结构的思路取得了一下创新性成果：将分布式IMS作为核心网,遵循P2P和IMS融合的思想设计网络结构和节点功能,提供多种灵活的业务支撑模式；针对VoIP和流媒体提出了各自的解决方案；项目中遇到的问题针对移动设备和P2P的NAT穿越提出了各自的解决方案,并在项目开发中对方案可行性进行验证；将等级化和Co-location预处理机制引入分布式IMS,减少消息开销提高系统可靠性。
The IP Multimedia Subsystem is seen as the core technology of NGN (Next Generation Network). IMS is considered as an important way to solve the fixed-mobile network convergence and the combination of multimedia services. But on the other hand, The IMS also has some problems that constrain its popularity, such as the inflexible capability of supporting new service, the excessive fuctional entities, complex system structure. IMS is facing challenges from the Internet technology. In some area, it has already been replaced. The Internet service itself constrained by security issues. As a result, distributed service network (DSN),which combines the advantages of P2P and IMS, provide a unified, secure and flexible support platform that support telecommunications and internet services at the meantime. It will be an important evolutionary direction of NGN. The implementation mechanisms of the Internet service, the distributed service network architecture, function node structure are researched as important supporting technologies. This article divides these research points to the following two parts.
The first part begins with the implementation mechanism of the internet service and the node function structure. Different supprot models are provided according to the different characteristics of the service, and the function nodes and the main service implementation process are also desighed.The second part optimizes the distributed IMS architecture which plays as the core of DSN. The architecture of exsiting distributed IMS is plane.It has interconnection and message overhead problems to resolve.
This article makes service supporting as the basic point and optimize the system structure based on this point, and achieved the following innovation:Making the distributed IMS as the core network of DSN, designing the network architecture and node structure based on the thought of the integration of P2P and IMS,providing multiple flexible service support capability; Proposing solutions aimed at VoIP and streaming media; As for the problems discovered during the program,the article proposes solutions of weak capacity of Mobile device and the NAT Traversal of P2P overlay and the feasibility of the solutions is been tested in the program;Introducing a hierarchical and Co-location mechanism to the distributed IMS.In this way, the message overhead is reduced and the system reliability is promoted.
引文
[1]3GPP TS 23.228:IP Multimedia Subsystem (IMS), Stage 2 Specification, April, 2006
[2]Gonzalo Camarillo, Miguel-Angel Garcia-Martin "The 3G IP Multimedia Subsystem (IMS):Merging the Internet and the Cellular Worlds"
[3]D.S. Milojicic, V.Kalogeraki, R. Lukose, K. Nagaraja, J.Pruyne, B. Richard, S. Rollins, and Z. Xu.Peer-to-Peer Computing. HP Laboratories Palo Alto,2002.
[4]中国移动通信研究院,《分布式业务网络(DSN)技术白皮书》,ver1.0,2008-11-28http://labs.chinamobile.com/showarticle.php?id=10386&action=view&grade=1
[5]J. Rosenberg, H. Schulzrinne, G Camarillo, A. Johnston, J. Peterson, R. Sparks, M. Handley, and E. Schooler. SIP:Session Initiation Protocol, RFC 3261,Internet Engineering Task Force.2002.
[6]J. Rosenberg and H. Schulzrinne. Session Initiation Protocol (SIP):Locating SIP Servers, RFC 3263, Internet Engineering Task Force.2002.
[7]Skype, http://www.skype.net
[8]Bitcomet, http://www.bitcomet.com
[9]Ali Ghodsi. Distributed k-ary System:Algorithms for Distributed Hash Tables. KTH-Royal Institute of Technology,2006.
[10]I. Stoica, R. Morris, D. Liben-Nowell, D.R. Karger, M.F. Kaashoek, F. Dabek, and H. Balakrishnan. Chord:A Scalable Peer-to-Peer Lookup Protocol for Internet Applications. IEEE/ACM Transactions on Networking, page 17,2003.
[11]S. Ratsanamy, P.Francis, M. Handley, and R. Karp. A Scalable Content-Addressable Network. In Proc. ACM Sigcomm, pages 161-172,2001.
[12]A. Rowstron and P. Druschel. Pastry:Scalable, Distributed Object Location and Routing for Large-Scale Peer-to-Peer Systems. In IFIP/ACM International Conference on Distributed Systems Platforms (Middleware),2001.
[13]B.Y. Zhao, L. Huang, J. Stribling, S.C. Rhea, A.D. Joseph, and J.D. Kubiatowicz. Tapestry:A Resilient Global-scale Overlay for Service Deployment. Selected Areas in Communications, IEEE Journal on,2004.
[14]D.A. Bryan, B.B. Lowekamp, and C. Jennings. SOSIMPLE:A Serverless, Standards-based, P2P SIP Communication System. In Proc. IEEE AAA-IDEA 05, 2005. [15]K. Singh and H. Schulzrinne. Peer-to-Peer Internet Telephony using SIP.In
Proceedings of the International Workshop on Network and Operating Systems Support for Digital Audio and Video (NOSSDAV05), pages 63-68,2005.
[16]KK Dhara and S. Baset. Dynamic Peer-To-Peer Overlays for Voice Systems. pages 151-156,2006.
[17]N. Banerjee, A. Acharya, and S.K. Das. Peer-to-Peer SIP-based Services over Wireless Ad Hoc Networks.In BROADWIM:Broadband Wireless Multimedia Workshop,2004.
[18]IETF P2PSIP Working Group, http://tools.ietf.org/wg/p2psip
[19]Ericsson,Introduction to IMS white paper
[20]Miikka Poikselka, Aki Niemi, Hisham Khartabil, Georg Mayer "The IMS:IP Multimedia Concepts and Services"
[21]毕厚杰,李秀川,IMS与下一代网络,人民邮电出版社,2006
[22]牟晓隆,“中兴通讯IMS产品首席架构师卢云川：IMS可与P2P相结合”,通信世界B 2007(48)
[23]Marcin Matuszewskil, Miguel A. Garcia-Martin2,"A Distributed IP Multimedia Subsystem (IMS)
[24]王菁,薛海强,彭晋,魏冰,一种新型的分布式IMS实现方法,电信科学,2008年第24卷第2期
[25]Calhoun, P., Loughney, J., Guttman, E., Zorn, G, and J. Arkko,"Diameter Base Protocol",RFC 3588, September 2003.
[26]F. Dabek, B. Zhao, P.Druschel, J. Kubiatowicz, and I. Stoica. Towards a common API for Structured Peer-to-Peer Overlays. In Proc. of IPTPS, volume 58,2003.
[27]S. Rhea, B. Godfrey, B. Karp, J. Kubiatowicz, S.Ratnasamy, S. Shenker, I. Stoica, and H. Yu. OpenDHT:A Public DHT Service and Its Uses. In Proc. of Sigcomm, pages 73-84,2005.
[28]B. Karp, S. Ratnasamy, S.Rhea, and S. Shenker. Spurring Adoption of DHTs with OpenHash, A Public DHT Service. In Proc. of IPTPS,2004.
[29]Olyo项目,http://code.google.com/p/olyo.
[30]Partysip, http://www.partysip.org.
[31]Overlay Weaver, http://overlayweaver.sourceforge.net/.
[32]Network Grade of Service Parameters and Target Values for Circuitswitched Services in the Evolving ISDN. Technical report, Recommendation E.721, Telecommunication Standardization Sector of ITU,1999.
[33]A Model for Presence and Instant Messaging.IETF RFC 2778.2000
[34]An Extensible Language (XML) Based Format for Watcher. IETF RFC3858. 2004
[35]The XML Configuration Access Protocol(XCAP),IETF draft-ietf-simple-xcap-12. 2006
[36]S Guha, N Daswani, R Jain, An Experimental Study of the Skype Peer-to-Peer VoIP System International Workshop on Peer-to-Peer Systems (IPTPS'06)
[37]K. Egevang, P.Francis, "The IP Network Address Translator (NAT)". RFC 1631, Internet Engineering Task Force, May 1994.
[38]Fuller, V., Li, T., and J. Yu,"Classless Inter-Domain Routing (CIDR) an Address Assignment and Aggregation Strategy",RFC 1519, Internet Engineering Task Force, September 1993.
[39]P. Srisuresh, K. Egevang "Traditional IP Network Address Translator (Traditional NAT)" RFC3022, Internet Engineering Task Force, January 2001
[40]UPnP forum, http://www.upnp.org/.
[41]SIP-Communicator http://www.sip-communicator.org.
[42]Juwei Shi, Yang Ji, Hua Zhang, Yinong Li,"Hierarchical P2P-SIP Architecture", IETF draft, http://www3.ietf.org/internet-drafts/draft-shi-p2psip-hier-arch-00.txt
[43]Thierry Bessis. Improving Performance and Reliability of an IMS Network by Co-Locating IMS Servers. Bell Labs Technical Journal, Vol 10, No.4 Winter 2006.
[2]Gonzalo Camarillo, Miguel-Angel Garcia-Martin "The 3G IP Multimedia Subsystem (IMS):Merging the Internet and the Cellular Worlds"
[3]D.S. Milojicic, V.Kalogeraki, R. Lukose, K. Nagaraja, J.Pruyne, B. Richard, S. Rollins, and Z. Xu.Peer-to-Peer Computing. HP Laboratories Palo Alto,2002.
[4]中国移动通信研究院,《分布式业务网络(DSN)技术白皮书》,ver1.0,2008-11-28http://labs.chinamobile.com/showarticle.php?id=10386&action=view&grade=1
[5]J. Rosenberg, H. Schulzrinne, G Camarillo, A. Johnston, J. Peterson, R. Sparks, M. Handley, and E. Schooler. SIP:Session Initiation Protocol, RFC 3261,Internet Engineering Task Force.2002.
[6]J. Rosenberg and H. Schulzrinne. Session Initiation Protocol (SIP):Locating SIP Servers, RFC 3263, Internet Engineering Task Force.2002.
[7]Skype, http://www.skype.net
[8]Bitcomet, http://www.bitcomet.com
[9]Ali Ghodsi. Distributed k-ary System:Algorithms for Distributed Hash Tables. KTH-Royal Institute of Technology,2006.
[10]I. Stoica, R. Morris, D. Liben-Nowell, D.R. Karger, M.F. Kaashoek, F. Dabek, and H. Balakrishnan. Chord:A Scalable Peer-to-Peer Lookup Protocol for Internet Applications. IEEE/ACM Transactions on Networking, page 17,2003.
[11]S. Ratsanamy, P.Francis, M. Handley, and R. Karp. A Scalable Content-Addressable Network. In Proc. ACM Sigcomm, pages 161-172,2001.
[12]A. Rowstron and P. Druschel. Pastry:Scalable, Distributed Object Location and Routing for Large-Scale Peer-to-Peer Systems. In IFIP/ACM International Conference on Distributed Systems Platforms (Middleware),2001.
[13]B.Y. Zhao, L. Huang, J. Stribling, S.C. Rhea, A.D. Joseph, and J.D. Kubiatowicz. Tapestry:A Resilient Global-scale Overlay for Service Deployment. Selected Areas in Communications, IEEE Journal on,2004.
[14]D.A. Bryan, B.B. Lowekamp, and C. Jennings. SOSIMPLE:A Serverless, Standards-based, P2P SIP Communication System. In Proc. IEEE AAA-IDEA 05, 2005. [15]K. Singh and H. Schulzrinne. Peer-to-Peer Internet Telephony using SIP.In
Proceedings of the International Workshop on Network and Operating Systems Support for Digital Audio and Video (NOSSDAV05), pages 63-68,2005.
[16]KK Dhara and S. Baset. Dynamic Peer-To-Peer Overlays for Voice Systems. pages 151-156,2006.
[17]N. Banerjee, A. Acharya, and S.K. Das. Peer-to-Peer SIP-based Services over Wireless Ad Hoc Networks.In BROADWIM:Broadband Wireless Multimedia Workshop,2004.
[18]IETF P2PSIP Working Group, http://tools.ietf.org/wg/p2psip
[19]Ericsson,Introduction to IMS white paper
[20]Miikka Poikselka, Aki Niemi, Hisham Khartabil, Georg Mayer "The IMS:IP Multimedia Concepts and Services"
[21]毕厚杰,李秀川,IMS与下一代网络,人民邮电出版社,2006
[22]牟晓隆,“中兴通讯IMS产品首席架构师卢云川：IMS可与P2P相结合”,通信世界B 2007(48)
[23]Marcin Matuszewskil, Miguel A. Garcia-Martin2,"A Distributed IP Multimedia Subsystem (IMS)
[24]王菁,薛海强,彭晋,魏冰,一种新型的分布式IMS实现方法,电信科学,2008年第24卷第2期
[25]Calhoun, P., Loughney, J., Guttman, E., Zorn, G, and J. Arkko,"Diameter Base Protocol",RFC 3588, September 2003.
[26]F. Dabek, B. Zhao, P.Druschel, J. Kubiatowicz, and I. Stoica. Towards a common API for Structured Peer-to-Peer Overlays. In Proc. of IPTPS, volume 58,2003.
[27]S. Rhea, B. Godfrey, B. Karp, J. Kubiatowicz, S.Ratnasamy, S. Shenker, I. Stoica, and H. Yu. OpenDHT:A Public DHT Service and Its Uses. In Proc. of Sigcomm, pages 73-84,2005.
[28]B. Karp, S. Ratnasamy, S.Rhea, and S. Shenker. Spurring Adoption of DHTs with OpenHash, A Public DHT Service. In Proc. of IPTPS,2004.
[29]Olyo项目,http://code.google.com/p/olyo.
[30]Partysip, http://www.partysip.org.
[31]Overlay Weaver, http://overlayweaver.sourceforge.net/.
[32]Network Grade of Service Parameters and Target Values for Circuitswitched Services in the Evolving ISDN. Technical report, Recommendation E.721, Telecommunication Standardization Sector of ITU,1999.
[33]A Model for Presence and Instant Messaging.IETF RFC 2778.2000
[34]An Extensible Language (XML) Based Format for Watcher. IETF RFC3858. 2004
[35]The XML Configuration Access Protocol(XCAP),IETF draft-ietf-simple-xcap-12. 2006
[36]S Guha, N Daswani, R Jain, An Experimental Study of the Skype Peer-to-Peer VoIP System International Workshop on Peer-to-Peer Systems (IPTPS'06)
[37]K. Egevang, P.Francis, "The IP Network Address Translator (NAT)". RFC 1631, Internet Engineering Task Force, May 1994.
[38]Fuller, V., Li, T., and J. Yu,"Classless Inter-Domain Routing (CIDR) an Address Assignment and Aggregation Strategy",RFC 1519, Internet Engineering Task Force, September 1993.
[39]P. Srisuresh, K. Egevang "Traditional IP Network Address Translator (Traditional NAT)" RFC3022, Internet Engineering Task Force, January 2001
[40]UPnP forum, http://www.upnp.org/.
[41]SIP-Communicator http://www.sip-communicator.org.
[42]Juwei Shi, Yang Ji, Hua Zhang, Yinong Li,"Hierarchical P2P-SIP Architecture", IETF draft, http://www3.ietf.org/internet-drafts/draft-shi-p2psip-hier-arch-00.txt
[43]Thierry Bessis. Improving Performance and Reliability of an IMS Network by Co-Locating IMS Servers. Bell Labs Technical Journal, Vol 10, No.4 Winter 2006.
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