基于下一代网络信令体系的QoS信令研究
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摘要
移动通信技术的迅猛发展,实时业务被引入到移动网络环境下,从而对移动网络环境下的服务质量(QoS)保证提出了新的要求,如何在移动IPv6网络中提供QoS保证是目前研究的热点。
现有的移动IPv6环境下QoS解决方案大都是基于RSVP协议的,但鉴于RSVP在安全性、灵活性和扩展性等方面面临着诸多问题,本论文引入了下一代网络信令协议——NSIS。NSIS根据模块化的要求将信令协议分成了两层:信令传输层(NTLP)和信令应用层(NSLP),这种体系结构在很大程度上决定了NSIS的灵活性和可扩展性。
本文首先详细介绍了NSIS的两层信令体系结构,回顾了现有的IP QoS体系方案,在此基础上全面分析了下一代网络信令体系中在移动IPv6环境下QoS NSLP可能面临的各个方面的问题,创造性地提出了对应的端到端的解决方案,文章在最后用较大的篇幅介绍了基于NS2平台的QoS NSLP的仿真软件的设计和实现。
本文的创新点在于提出了一种移动IPv6环境下,QoS NSLP如何在切换前后平滑过渡的端到端的解决方案。解决了在移动切换后在新路径上尽快地建立新的QoS NSLP状态,在旧路径上拆除旧状态的问题。主要思想是通过在移动IP绑定更新信令建立的同时,进行QoS NSLP信令状态的建立,这样节省了移动切换事件后等待移动IP信令建立QoS重新建立的延时,有效地避免了在这段时间内由于没有QoS保证所引起的QoS降级。
With the rapid development of mobile communication technology, real-time services are applying in mobile environment. There are new requirements of QoS (Quality of Service) guarantee in mobile environment. How to provide QoS guarantee in the Mobile IPv6 network is becoming a hot topic.
The existing solutions of QoS in Mobile IPv6 are almost based on RSVP. However, there're many unsolvable problems such as security, flexibility, scalability in RSVP. In this paper we introduce Next Step in
Signaling------NSIS. According to the modular requirement, NSISprotocol suite is structured in two layers: signaling transport layer(NTLP) and signaling application layer(NSLP). And the layered architecture determines the flexibility and scalability of NSIS.
This paper firstly gives a detail introduction of the two layers' architecture of Next Step In Signaling, describes the existed solutions of IP QoS architecture. And then it analyzes the possible problems Next Step In signaling would face in mobile IPv6 environment and proposes an end-to-end solution for it. At the end of the paper, a software design and implementation of QoS NSLP based on NS2 simulation platform is given.
In this paper, we propose an end-to-end QoS provisioning mechanism based on NSIS (Next Step In Signaling) protocol suite in mobile IPv6 environment. Resource reservation on the new path must be done as quickly as possible after handover event for the Mobile Node (MN) which is especially important when real-time applications are used. We focus on end-to-end procedure for a fast QoS re-establishment, the basic idea of which is to reduce the time between the handover event and NSIS state re-establishment on the new path. It is designed to send the NSIS signaling message together with Binding Update (BU)/Binding Acknowledgement (BA) after handover, in order to avoid wasting time to wait for mobility detecting.
现有的移动IPv6环境下QoS解决方案大都是基于RSVP协议的,但鉴于RSVP在安全性、灵活性和扩展性等方面面临着诸多问题,本论文引入了下一代网络信令协议——NSIS。NSIS根据模块化的要求将信令协议分成了两层:信令传输层(NTLP)和信令应用层(NSLP),这种体系结构在很大程度上决定了NSIS的灵活性和可扩展性。
本文首先详细介绍了NSIS的两层信令体系结构,回顾了现有的IP QoS体系方案,在此基础上全面分析了下一代网络信令体系中在移动IPv6环境下QoS NSLP可能面临的各个方面的问题,创造性地提出了对应的端到端的解决方案,文章在最后用较大的篇幅介绍了基于NS2平台的QoS NSLP的仿真软件的设计和实现。
本文的创新点在于提出了一种移动IPv6环境下,QoS NSLP如何在切换前后平滑过渡的端到端的解决方案。解决了在移动切换后在新路径上尽快地建立新的QoS NSLP状态,在旧路径上拆除旧状态的问题。主要思想是通过在移动IP绑定更新信令建立的同时,进行QoS NSLP信令状态的建立,这样节省了移动切换事件后等待移动IP信令建立QoS重新建立的延时,有效地避免了在这段时间内由于没有QoS保证所引起的QoS降级。
With the rapid development of mobile communication technology, real-time services are applying in mobile environment. There are new requirements of QoS (Quality of Service) guarantee in mobile environment. How to provide QoS guarantee in the Mobile IPv6 network is becoming a hot topic.
The existing solutions of QoS in Mobile IPv6 are almost based on RSVP. However, there're many unsolvable problems such as security, flexibility, scalability in RSVP. In this paper we introduce Next Step in
Signaling------NSIS. According to the modular requirement, NSISprotocol suite is structured in two layers: signaling transport layer(NTLP) and signaling application layer(NSLP). And the layered architecture determines the flexibility and scalability of NSIS.
This paper firstly gives a detail introduction of the two layers' architecture of Next Step In Signaling, describes the existed solutions of IP QoS architecture. And then it analyzes the possible problems Next Step In signaling would face in mobile IPv6 environment and proposes an end-to-end solution for it. At the end of the paper, a software design and implementation of QoS NSLP based on NS2 simulation platform is given.
In this paper, we propose an end-to-end QoS provisioning mechanism based on NSIS (Next Step In Signaling) protocol suite in mobile IPv6 environment. Resource reservation on the new path must be done as quickly as possible after handover event for the Mobile Node (MN) which is especially important when real-time applications are used. We focus on end-to-end procedure for a fast QoS re-establishment, the basic idea of which is to reduce the time between the handover event and NSIS state re-establishment on the new path. It is designed to send the NSIS signaling message together with Binding Update (BU)/Binding Acknowledgement (BA) after handover, in order to avoid wasting time to wait for mobility detecting.
引文
[1].R.Braden,L.Zhang,S.Berson "Resource ReSerVation Protocol(RSVP)"IETF RFC 2205 September 1997.
[2].R.Hancock,G.Karagiannis,J.Loughney "Next Steps in Signaling:Framework" IETF RFC 4080 June 2005.
[3].H.Schulzrinne,R.Hancock "GIST:General Interact Signaling Transport"IETF Internet Draft draft-ieff-nsis-ntlp-09.txt Febrary 2006.
[4].Jukka Manner "NSLP for Quality-of-Service signaling" IETF Internet Draft draft-ietf-nsis-qos-nslp-10.txt March 2006.
[5].Martin Stiemerling "NAT/Firewall NSIS Signaling Layer Protocol" IETF Internet Draft draft-ieff-nsis-nslp-natfw-11.txt April 2006.
[6].Xiaoming Fu,Attila Bader,Cornelia Kappler "NSIS:A New Extensible IP Signaling Protocol Suite" IEEE Communications Magazine Internet Technology Series October 2005.
[7].Jerry Ash,Attila Bader,Cornelia Kappler "QoS-NSLP QSPEC Template"IETF Internet Draft draft-ietf-nsis-qspec-09.txt March 2006.
[8].Braden R,Clark D,and Shenker S Integrated services in the Internet architecture:an overview.IETF RFC 1633June 1994.
[9].Shenker S,Partridge C,and Guerin R Specification of guaranteed quality of service IETF RFC 2212 September 1997.
[10].RFC 2474 "Definition of the Differentiated Services Field(DS Field)in the IPv4 and IPv6 Headers" December 1998
[11].林闯,单志广,盛立杰,吴建平 “因特网区分服务及其几个热点问题的研究” 《计算机学报》 2000年第四期
[12].C.Shen,A.Lo,W.Seah Performance Evaluation of Flow Transparent Mobile IPv6 and RSVP Integration Florida USA:Proc.SCI/ISAS 2001 July 2001
[13].X.Fu,H.Karl,C.Kappler "QoS-Conditionalized Handoff for Mobile IPv6"Pisa:Networking 2002 May 2002
[14].S.Lee,Ed.SameSun "Applicability Statement of NSIS Protocols in Mobile Evironments" IETF Interact Draft draft-ietf-nsis-applicabilitymobility-signaling-05.txt June 2006.
[15].F.Tommasi,S.Molendini,A.Trieco,E.Scialpi "Semi-Proactive QoS Re-establishment" IETF Internet Draft draft-tommasi-nsis-semipro-00.txt February 2006.
[16].D.Johnson,C.Perkins "Mobility Support in IPv6" IETF RFC 3775 June 2004.
[17].孙利民,阚志刚,郑建平等《移动IP技术》 电子工业出版社 北京 2003年8月.
[18].齐志峰,赵珑,张有志等 移动IPv6环境中集成RSVP信令机制 网络与通信 2005年02期.
[19].陈阳,杨寿保,何涛等 基于层次化移动管理的流透明移动IPv6 QoS计算机科学 2004年.
[20].徐雷鸣,庞博,赵耀 《NS与网络模拟》 人民邮电出版社 北京 2003年11月.
[21].秦冀,姜雪松《移动IP技术与NS-2模拟》 机械工业出版社 北京 2006年9月.
[2].R.Hancock,G.Karagiannis,J.Loughney "Next Steps in Signaling:Framework" IETF RFC 4080 June 2005.
[3].H.Schulzrinne,R.Hancock "GIST:General Interact Signaling Transport"IETF Internet Draft draft-ieff-nsis-ntlp-09.txt Febrary 2006.
[4].Jukka Manner "NSLP for Quality-of-Service signaling" IETF Internet Draft draft-ietf-nsis-qos-nslp-10.txt March 2006.
[5].Martin Stiemerling "NAT/Firewall NSIS Signaling Layer Protocol" IETF Internet Draft draft-ieff-nsis-nslp-natfw-11.txt April 2006.
[6].Xiaoming Fu,Attila Bader,Cornelia Kappler "NSIS:A New Extensible IP Signaling Protocol Suite" IEEE Communications Magazine Internet Technology Series October 2005.
[7].Jerry Ash,Attila Bader,Cornelia Kappler "QoS-NSLP QSPEC Template"IETF Internet Draft draft-ietf-nsis-qspec-09.txt March 2006.
[8].Braden R,Clark D,and Shenker S Integrated services in the Internet architecture:an overview.IETF RFC 1633June 1994.
[9].Shenker S,Partridge C,and Guerin R Specification of guaranteed quality of service IETF RFC 2212 September 1997.
[10].RFC 2474 "Definition of the Differentiated Services Field(DS Field)in the IPv4 and IPv6 Headers" December 1998
[11].林闯,单志广,盛立杰,吴建平 “因特网区分服务及其几个热点问题的研究” 《计算机学报》 2000年第四期
[12].C.Shen,A.Lo,W.Seah Performance Evaluation of Flow Transparent Mobile IPv6 and RSVP Integration Florida USA:Proc.SCI/ISAS 2001 July 2001
[13].X.Fu,H.Karl,C.Kappler "QoS-Conditionalized Handoff for Mobile IPv6"Pisa:Networking 2002 May 2002
[14].S.Lee,Ed.SameSun "Applicability Statement of NSIS Protocols in Mobile Evironments" IETF Interact Draft draft-ietf-nsis-applicabilitymobility-signaling-05.txt June 2006.
[15].F.Tommasi,S.Molendini,A.Trieco,E.Scialpi "Semi-Proactive QoS Re-establishment" IETF Internet Draft draft-tommasi-nsis-semipro-00.txt February 2006.
[16].D.Johnson,C.Perkins "Mobility Support in IPv6" IETF RFC 3775 June 2004.
[17].孙利民,阚志刚,郑建平等《移动IP技术》 电子工业出版社 北京 2003年8月.
[18].齐志峰,赵珑,张有志等 移动IPv6环境中集成RSVP信令机制 网络与通信 2005年02期.
[19].陈阳,杨寿保,何涛等 基于层次化移动管理的流透明移动IPv6 QoS计算机科学 2004年.
[20].徐雷鸣,庞博,赵耀 《NS与网络模拟》 人民邮电出版社 北京 2003年11月.
[21].秦冀,姜雪松《移动IP技术与NS-2模拟》 机械工业出版社 北京 2006年9月.