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业务融合关键技术研究
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摘要
随着网络技术和终端能力的不断发展和演进,电信网、互联网和广播电视网之间的业务界限逐渐淡化,并衍生出丰富的业务供用户使用。但用户对业务的需求也逐渐发生了变化,从单纯的语音通信逐渐向多种媒体信息交互转变,从单一终端单一网络的接入方式向多终端多网络接入和多终端协同通信方式转变,从统一的业务提供模式向智能化个性化业务提供模式转变。因此,提供跨网络、跨终端,具有环境感知能力和智能性的新一代融合业务成为了一种必然的趋势。
     在本论文中,作者对业务融合的若干关键技术,包括业务融合的体系结构、信息融合架构和模型、融合业务的跨设备移动性和连续性,以及融合业务中实时媒体流在无线接入网络环境中的传送效率等问题进行了深入的研究,并取得了一些研究成果。论文的主要贡献和创新点如下:
     1、针对传统通信业务各自独立设计而导致的业务体系结构独立、业务能力重复和无法重用、业务体验单一等问题,提出了一种新型的融合业务体系架构。该融合业务体系架构采用水平化、组件化的思想进行设计,能够支持多种业务能力的融合,具有用户和网络环境感知能力,支持多种设备的协同通信,支持跨设备、跨网络的业务移动性和连续性,支持业务组件能力的动态重用,并具有智能化、个性化业务提供能力。
     2、针对现有网络和业务环境中,支撑融合业务能力的用户信息存在分散存储、冗余、不一致,以及由此引起的业务性能差等问题,提出了一种集中式的用户信息融合模型架构,以及基于该架构的以用户为中心的信息关联模型、基于统一语义的信息存储模型和基于Push模式的动态信息感知模型。该模型架构在信息查询效率、信息一致性和完整性、网络流量,以及业务提供时延、业务准确性和智能化业务提供等方面均具有明显的优势,解决了融合业务系统可能存在的性能问题和扩展性问题,增强了用户的业务体验。
     3、对融合业务的跨设备业务/会话移动性和连续性进行了系统的研究,提出了一种通过在网络中部署业务移动管理服务器和上下文感知信息库的跨设备业务/会话移动架构,提出了基于该架构的跨设备业务/会话移动控制机制和方法。基于排队论理论,对异构接入网络环境中的融合业务的跨设备业务/会话移动行为进行了网络建模,对跨设备业务/会话移动的时延性能进行了理论分析和网络仿真。该方案能够保证融合业务在跨设备移动时的连续性,业务移动时延短,可以提供较好的用户业务体验。
     4、针对WLAN宽带无线接入网络的特殊性,提出了一种能够提高融合业务中的实时语音流的传送效率的多状态自适应语音帧组合模型。该模型综合考虑了多STA竞争、MAC层重传机制、物理信道的信噪比等因素,能够根据WLAN网络环境的变化实时调整应用层语音帧组合长度,从而提高融合业务实时语音流在WLAN中的传送效率。通过理论推导、仿真和实验,证明了模型的效果。
With the continuous development and evolution of network technologies and capabilities of terminals, the service boundaries among telecommunication networks, Internet networks and television networks have gradually vanished, and a lot of new services have been derived for each kind of networks. However, the service requirements from users have gradually changed, from simple voice communication to multimedia information interaction, from single network single terminal access to multi-network multi-terminal access and multi-device cooperative communication, from unified service delivery to intelligent personalized service delivery. Therefore, developing a new converged service with capabilities of multi-network multi-terminal access and environment-aware has become an inevitable trend.
     In this dissertation, the author researched systematically some key technologies of service convergence, including architecture of service convergence, framework and model of information convergence, cross-device mobility and continuity of converged service, and the transfer efficiency of real-time media streams over radio access network environment. The main contributions of the dissertation are as follows:
     1. Traditional communication services were designed independently according different service architectures, service capabilities could not be reused, and the service experience is simple. So, this dissertation proposes a new converged service architecture. This service architecture is built as horizontal layers and components, supporting the convergence of a variety of service enablers and media types, supporting the collaborating communication of multiple devices, supporting cross-device service mobility and continuity, supporting dynamical reuse of service components, with context-aware capabilities, and with the abilities of intelligent and personal service delivery.
     2. In current network and service environment, user information supporting the converged service enablers is usually stored dispersedly, and the content of user information is usually redundant and inconsistent. Therefore, the quality of service is usually bad. This dissertation proposes a centralized model and framework of converged user information, and a unified user-centric information association model, a unified semantic-based information storage model, and a push-based dynamic awareness model of user information. This model and framework has obvious advantages in efficiency of information query, information consistency and integrity, network traffic, service providing delay, service accuracy and intelligence, etc. It addresses the performace problems that may exist and the scalability issues of converged service system, therefore enhances the user's service experience.
     3. Studies systematically the cross-device service/session mobility and continuity of converged service. A framework and scheme of cross-device service/session mobility and continuity is proposed, which includes a service mobility mamagement server and a context-aware repository. The mobility control mechanism and methods are specified. Based on queuing theory, a network model is built for the behavior of across-device service/session mobility in converged service. The delay of cross-device service/session mobility is evaluated by theoretical analysis and simulation. It shows that the proposed cross-device service/session mobility solutions can ensure session continuity during cross-device mobility, mobility delay is short, and user's service experience is better.
     4. For the speciality of WLAN broadband wireless access network, a multi-state auto-adaptive voice frame combination model is proposed, which can improve the efficiency of voice streams. The model considers multiple STA competing, MAC layer retransmission mechanism, the signal to noise ratio of physical channel and other factors, which can adjust automatically the length of the application layer combination of voice frames according to the real-time changes of WLAN network environment. Therefore improves the transmission efficiency of real-time voice streams in WLAN network. Theoretical analysis, simulation and experiments have proved the validity of the model.
引文
[1][ITU-T Y.2013] ITU-T Recommendation Y.2013 (2006), Converged services framework functional requirements and architecture.
    [2][ITU-T Y.2232] ITU-T Recommendation Y.2232 (2008), NGN convergence service model and scenario using Web Services.
    [3][OWSER SPEC] OMA Web Services Enabler (OWSER):Core Specifications, Version 1.1, Open Mobile AllianceTM, OMA-TS-OWSER-Core-Specification-V1_1, URL: http://www.openmobilealliance.org/
    [4][MWS REQ] Mobile Web Services Requirements, Version 1.1, Open Mobile AllianceTM, OMA-RDOWSER-V1_1, URL: http://www.openmobilealliance.org/
    [5][OWSER Overview] OMA Web Services Enabler (OWSER):Overview, Version 1.1, Open Mobile AllianceTM, OMA-AD-OWSER-Overview-V1_1, URL:http://www.openmobilealliance.org/
    [6]OMA-RD-CPM-V1_0-20090202-D. Converged IP Messaging Requirements, http://member.openmobilealliance.org/ftp/public documents/req/REQ-CPM/Per manent documents/.
    [7]OMA-AD-CPM-V1_0-20090211-D. Converged IP Messaging Architecture, http://member.openmobilealliance.org/ftp/Public documents/MWG/MWG-CP M/Permanent documents/
    [8]SPICE Deliverable 1.1-User, entreprise, technical and open market business requirements(2006), Revision v1.4, URL:http://www.ist-spice.org/index.html
    [9]3GPP TR 32.808 V8.0.0 (2007-06):"Study of Common Profile Storage (CPS) Framework of User Data for network services and management (Release 8)"
    [10]3GPP TS 23.240 (V6.7.0):"3GPP Generic User Profile (GUP) requirements; Architecture (Stage 2) (Release 6)".
    [11]3GPP TR 23.941 (V6.0.0):"3GPP Generic User Profile (GUP); Stage 2; Data Description Method (DDM) (Release 6)".
    [12]3GPP TS 29.240 V6.1.0 (2005-06):"3GPP Generic User Profile (GUP); Stage 3; Network; (Release 6)".
    [13]3GPP TR23.838:"IP Multimedia Subsystem (IMS) Service Continuity enhancements; Service, policy and interaction; Stage 2 (R9)",2009.06.
    [14]Sandrine Lataste, etc. "From network layer mobility to IMS service continuity", France Telecom Research & Development.
    [15]Paolo Bellavista, Antonio Corradi, etc. "IMS-Compliant Management of Vertical Handoffs for Mobile Multimedia Session Continuity", IEEE Communication Magazine, vol.48, no.4, pp.114-121, April 2010.
    [16]Charles Kalmanek, etc, "A Network-Based Architecture for Seamless Mobility Services", IEEE Communications Magazine, June 2006.
    [17]Naoki, etc. "Dynamic Session Modification between Multiple Devices in the IMS/MMS Architecture", IEEE WCNC'2008, April 2008.
    [18]Jong-choul Yim, etc. "Network Initiated Inter UE Session Transfer Control in IMS",2010 The 12th International Conference on Advanced Communication Technology (ICACT), February 2010.
    [19]Joo-Chul Lee, Young-Ⅱ Choi, "Session Transfer Mechanism Considering Capabilities of Target Access Network",11th International Conference on Advanced Communication Technology,2009. February 2010.
    [20]Nguyen Huu Thanh, Le Thi Hang, etc., "Multimedia Session Continuity with Context-aware Capability in IMS-based Network",6th International Symposium on Wireless Communication Systems,2009. ISWCS 2009. pp. 383-387, Sept.2009.
    [21]V. Jacobson, "Compressing TCP/IP Headers for Low-Speed Serial Links", IETF RFC 1144, Feb.1990.
    [22]M. Degermark, B. Nordgren, S. Pink, "IP Header Compression", IETF RFC 2507, Feb.1999.
    [23]S. Casner, V. Jacobson, "Compressing IP/UDP/RTP Headers for Low-Speed Serial Links", IETF RFC 2508, Feb.1999.
    [24]C. Borman, C. Burmeister etc., "RObust Header Compression (ROHC): Framework and four profiles:RTP, UDP, ESP and uncompressed", IETF RFC 2508, July 2001.
    [25]Giuseppe Bianchi, "Performance Analysis of the IEEE 802.11 Distributed Coordination Function", IEEE Journal on Selected Areas in Communications, Vol.18, No.3, pp.535-547, March 2000.
    [26]E. N. Gilbert, "Capacity of a burst-noise channel", Bell Syst. Tech. J., Vol.39, pp.1253-1265,1906.
    [1]张永旺,卢美莲等.业务融合技术综述.中国新通信.2009.10.pp21-27.
    [2][ITU-T Y.2013] ITU-T Recommendation Y.2013 (2006), Converged services framework functional requirements and architecture.
    [3][ITU-T Y.2232] ITU-T Recommendation Y.2232 (2008), NGN convergence service model and scenario using Web Services.
    [4][OWSER SPEC] OMA Web Services Enabler (OWSER):Core Specifications, Version 1.1, Open Mobile AllianceTM, OMA-TS-OWSER-Core-Specification-V1_1, URL: http://www.openmobilealliance.org/
    [5][MWS REQ] Mobile Web Services Requirements, Version 1.1, Open Mobile AllianceTM, OMA-RDOWSER-V1_1, URL: http://www.openmobilealliance.org/
    [6][OWSER Overview] OMA Web Services Enabler (OWSER):Overview, Version 1.1, Open Mobile AllianceTM, OMA-AD-OWSER-Overview-V1_1, URL:http://www.openmobilealliance.org/
    [7]OMA-RD-CPM-V1_0-20090202-D. Converged IP Messaging Requirements, http://member.openmobilealliance.org/ftp/public documents/req/REQ-CPM/Per manent documents/.
    [8]OMA-AD-CPM-V1_0-20090211-D. Converged IP Messaging Architecture, http://member.openmobilealliance.org/ftp/Public documents/MWG/MWG-CP M/Permanent documents/
    [9]SPICE Deliverable 1.1-User, entreprise, technical and open market business requirements(2006), Revision v1.4, URL:http://www.ist-spice.org/index.html
    [1][ITU-T Y.2013] ITU-T Recommendation Y.2013 (2006), Converged services framework functional requirements and architecture.
    [2][ITU-T Y.2232] ITU-T Recommendation Y.2232 (2008), NGN convergence service model and scenario using Web Services.
    [3][OWSER SPEC] OMA Web Services Enabler (OWSER):Core Specifications, Version 1.1, Open Mobile AllianceTM, OMA-TS-OWSER-Core-Specification-V1_1, URL: http://www.openmobilealliance.org/
    [4][MWS REQ] Mobile Web Services Requirements, Version 1.1, Open Mobile AllianceTM, OMA-RDOWSER-V1_1, URL http://www.openmobilealliance.org/
    [5][OWSER Overview] OMA Web Services Enabler (OWSER):Overview, Version 1.1, Open Mobile AllianceTM, OMA-AD-OWSER-Overview-V1_1, URL:http://www.openmobilealliance.org
    [6]OMA-RD-CPM-V1_0-20090202-D. Converged IP Messaging Requirements, http://member.openmobilealliance.org/ftp/public documents/req/REQ-CPM/Per manent_documents/.
    [7]OMA-AD-CPM-V1_0-20090211-D. Converged IP Messaging Architecture, http://member.openmobilealliance.org/ftp/Public documents/MWG/MWG-CP M/Permanent documents/
    [8]SPICE Deliverable 1.1-User, entreprise, technical and open market business requirements(2006), Revision vl.4, URL:http://www.ist-spice.org/index.html
    [1][ITU-T Y.2013] ITU-T Recommendation Y.2013 (2006), Converged services framework functional requirements and architecture.
    [2]3GPP TR 32.808 V8.0.0 (2007-06):"Study of Common Profile Storage (CPS) Framework of User Data for network services and management (Release 8)".
    [3]3GPP TS 23.240 (V6.7.0):"3GPP Generic User Profile (GUP) requirements; Architecture (Stage 2) (Release 6)".
    [4]3GPP TR 23.941 (V6.0.0):"3GPP Generic User Profile (GUP); Stage 2; Data Description Method (DDM) (Release 6)".
    [5]3GPP TS 29.240 V6.1.0 (2005-06):"3GPP Generic User Profile (GUP); Stage 3; Network; (Release 6)".
    [6]SPICE Deliverable 1.8-Final Reference Architecture. http://www.ist-spice.org/nav/deliverables.htm. June,2008.
    [7]SPICE Deliverable 3.2-Specification of the service enablers provided by the user equipment management, dynamic desktop and resource utilisation in the DCS. http://www.ist-spice.org/nav/deliverables.htm. July,2008.
    [8]J. Rosenberg, "The Extensible Markup Language (XML) Confuguration Access Protocol (XCAP)", RFC4825, May 2007.
    [9]J. Rosenberg, "SIP:Session Initiation Protocol", RFC3261, June 2006.
    [10]A. B. Roach, "SIP-Specific Event Notificationl", RFC3265, June 2002.
    [11]J. Rosenberg, "A Session Initiation Protocol (SIP) Event Package for Registrations", RFC3680, March 2004.
    [12]OMA-RD-CAB-V1_0-20100624-D, Converged Address Book Requirements Draft Version 1.0,24 Jun 2010.
    [13]OMA-DDS-Presence_Data_Ext-V2_0-20081119-D.19Nov,2008. http://member.openmobilealliance.org/ftp/public documents/PAG/Permanent d ocuments/
    [14]J. Rosenberg, "A Data Model for Presence", RFC4479, July 2006.
    [15]H. Sugano, "Presence Information Data Format (PIDF)", RFC3863, August 2004.
    [16]H. Schulzrinne, "RPID:Rich Presence Extensions to the Presence Information Data Format (PIDF)", RFC4480, July 2006.
    [17]J. Peterson, "A Presence-based GEOPRIV Location Object Format", RFC4119, December 2005.
    [18]OMA-DDS-Presence_Data_Ext-V2_1-20100128-D, Jan 2010.
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    [21]H. Schulzrinne, "Common Policy:A Document Format for Expressing Privacy Preferences", RFC4745, February 2007.
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    [1]3GPP TR23.831 VO.3.0 IP Multimedia Subsystem (IMS) Service Continuity; Inter-UE Transfer enhancements; Stage 2 (Release 10).
    [2]Sandrine Lataste, etc. "From network layer mobility to IMS service continuity", France Telecom Research & Development.
    [3]Paolo Bellavista, Antonio Corradi, etc. "IMS-Compliant Management of Vertical Handoffs for Mobile Multimedia Session Continuity", IEEE Communication Magazine, vol.48, no.4, pp.114-121, April 2010.
    [4]Charles Kalmanek, etc, "A Network-Based Architecture for Seamless Mobility Services", IEEE Communications Magazine, June 2006.
    [5]Naoki, etc. "Dynamic Session Modification between Multiple Devices in the IMS/MMS Architecture", IEEE WCNC'2008, April 2008.
    [6]Jong-choul Yim, etc. "Network Initiated Inter UE Session Transfer Control in IMS",2010 The 12th International Conference on Advanced Communication Technology (ICACT), February 2010.
    [7]Joo-Chul Lee, Young-II Choi, "Session Transfer Mechanism Considering Capabilities of Target Access Network",11th International Conference on Advanced Communication Technology,2009. February 2010.
    [8]Nguyen Huu Thanh, Le Thi Hang, etc., "Multimedia Session Continuity with Context-aware Capability in IMS-based Network",6th International Symposium on Wireless Communication Systems,2009. ISWCS 2009. pp. 383-387, Sept.2009.
    [9]3GPP TR 23.893 V8.0.0:"Feasibility Study on Multimedia Session Continuity; Stage 2 (R8)",2008.10.
    [10]3GPP TS 23.237 V8.1.0:"IP Multimedia Subsystem (IMS) Service Continuity, Stage 2 (R8)",2008.09.
    [11]3GPP TS 24.237 V1.1.0:"IP Multimedia Subsystem (IMS) Service Continuity, Stage 3 (R8)",2008.10.
    [12]3GPP TR23.838:"IP Multimedia Subsystem (IMS) Service Continuity enhancements; Service, policy and interaction; Stage 2 (R9)",2009.06.
    [13]R. Sparks, etc. "The Session Initiation Protocol (SIP) Call Control-Transfer", RFC5589, June 2009.
    [14]R. Sparks, "The Session Initiation Protocol (SIP) Refer Method", RFC 3515, April 2003.
    [15]R. Mahy, etc. "The Session Initiation Protocol (SIP)'Replaces'Header", RFC 3891, September 2004.
    [16]R. Sparks, ctc. "A Call Control and Multi-Party Usage Framework for the Session Initiation Protocol (SIP)", RFC5850, May 2010.
    [17]J. Rosenberg, J. Peterson, etc. "Best Current Practices for Third Party Call Control (3PCC) in the Session Initiation Protocol (SIP)", RFC3725, April 2004.
    [18]R. Sparks, etc. "The Session Initiation Protocol (SIP) Referred-By Mechanism", RFC3892, September 2004.
    [19]J. Rosenberg, etc. "SIP:Session Initiation Protocol", RFC3261, June 2002.
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