移动IP环境下的RSVP研究

资源预留协议RSVP能够为用户提供端到端的传输带宽。为保证在移动IP下的服务质量,针对RSVP协议提出很多改进方案,如隧道RSVP,MRSVP和HMRSVP等。对宏移动和微移动下的RSVP扩展方案进行了讨论,最后提出进一步的研究方向。     

移动IPv6环境中集成RSVP信令机制

本文针对在移动无线IP网络中运行RSVP信令协议存在的问题，提出了一种把RSVP信令集成于Ipv6数据包头扩展字段的方案，以减少切换过程中资源预留路径建立的时间，为移动节点提供了服务质量保障。并将此方案和原始RSVP方案在资源预留时间和信令负荷方面进行了性能比较。     

一种改进的HMRSVP方案

介绍了RSVP与MRSVP,以及在Mobile IP中采用MRSVP实现QoS保障的机制。分析和比较了3种HMRSVP方案,特别是指针转发的HMRSVP方案,并提出一种改进的方案。在此方案中,若移动主机在同一个分层区域内移动,则利用它在移动时所具有的本地性,采用指针转发的HMRSVP方案;若移动主机进入新的分层区域,则要求它建立新的RSVP通路,开始新的指针转发过程。同时对本地化特性进行了讨论。对改进的方案在两种情况下分别进行了建模、分析、结果表明,改进的方案性能更加优越。     

NSIS的研究与实现

业务日趋多样化的下一代网络迫切地需要一种灵活的基于IP的通用网络信令体系,现有的IP网络信令协议(如RSVP)在安全性、灵活性、扩展性等方面存在着许多缺陷,NSIS信令协议就是针对这些要求提出的,其在应用扩展性和安全性等方面有较好的突破.主要阐述了NSIS的模块化两层体系结构--下层的NSIS信令传输层协议(NTLP)负责信令消息的传输和状态管理,上层的NSIS信令层协议(NSLP)负责各种信令应用.并将NSIS与现有的RSVP协议进行比较,最后介绍了NSIS软件平台的实现及进一步研究的切入点.     

全IP移动通信网接入网的QoS保证机制研究

移动性管理和服务质量(Q0S)保证一直是移动通信网络中两个关键性问题.文章介绍了全IP移动通信网接入网部分的几种QoS实现机制,通过扩展QoS保证机制与微移动管理协议之间的耦合,提出了一种资源预留协议(RSVP)和Hawaii协议松耦合的方案,并以集成了RSVP和Hawaii的仿真平台对该方案进行了仿真.仿真结果表明,松耦合方案可以显著地提高切换过程中的QoS.     

移动IPv6网络中的QoS及其实现探讨

由于移动环境的特殊性，使得在移动网络中提供服务质量（QoS）变得非常复杂。文章首先分析了基于RSVP的移动IPv6QoS解决方案，然后引入了一种新的IP通用信令体系——NSIS，并讨论了NSIS在移动IPv6网络QoS中的应用。     

移动IP上的QoS保证

本文首先介绍了QoS的概念模型，然后着重分析了QoS中RSCP(资源预留协议)在移动IP上存在的问题并提出了RSVP与移动IP结合的几种方案，在此基础上介绍了一种在移动IP上提供端到端的QoS机制。     

移动IP的寻呼扩展技术

介绍了一种简单易行的移动IP的扩展方案,它通过对基本的移动IP协议进行简单的扩展,使其支持寻呼功能,减少大量的信令开销,使MIP能够支持大量移动用户。     

采用IntServ-over-DiffServ的UMTS全IP接入方案

讨论UMTS系统全IP接入的QoS问题，提出一种采用IntServ-over-DiffServ的全IP接入方案，以解决UTRAN网络中的QoS问题。该方案在节点B和无线网络控制器之间建立区分服务域，并在其中使用聚合RSVP技术，既保证了网络的扩展性，又能够向业务流提供良好的QoS支持。     

在基于MPLS的层次化移动IP网络中支持DiffServ的研究

MPLS支持DiffServ、流量工程,能为网络提供较好的QoS保证,而移动IP(MIP)能为移动设备提供较好的移动性支持。文章探讨了在无线接入网中MPLS和MIP结合实现DiffServ的方案,并给出了一种在基于MPLS的层次化MIP网络结构中支持DiffServ的体系结构,设计了其节点功能模型和关键协议。方案中利用了层次化结构的区域注册和重路由机制,减少了切换时延和网络的信令负荷。     

HMRSVP: A Hierarchical Mobile RSVP Protocol

In this paper, we propose a hierarchical Mobile RSVP (HMRSVP) that can achieve mobility independent QoS-guaranteed services in mobile computing environments. The HMRSVP integrates RSVP with Mobile IP regional registration and makes advance resource reservations only when an inter-region movement may possibly occur. We first show that, by NS simulator, our HMRSVP can achieve the same QoS guarantees as MRSVP does with fewer resource reservations. Then, we show that HMRSVP outperforms MRSVP in terms of reservation blocking, forced termination and session completion probabilities.     

RSVP Extensions for Real-Time Services in Hierarchical Mobile IPv6

The Mobile IPv6 (MIPv6) provides many great features, such as sufficient addressing space, mobility, and security; MIPv6 is one of the most important protocols for next generation mobile Internet. Simultaneously, with the rapid improvement of wireless technologies, the real-time multi-media IP services such as video on demand, videoconference, interactive games, IP telephony and video IP phone will be delivered in the near future. Thus, to furnish accurate QoS for real-time services is one of the most important thing in the next generation mobile Internet. Although RSVP, which is a resource reservation protocol, processes signaling messages to establish QoS paths between senders and receivers, RSVP was originally designed for stationary networks and not aware of the mobility of MNs. Therefore, this paper proposes a novel RSVP extension to support real-time services in Hierarchical Mobile IPv6 (HMIPv6) environments. For intra-site mobility, the concept of QoS Agent (QA) is proposed to handle the RSVP QoS update messages and provide the advanced reservation models for real-time services. For inter-site mobility, IP multicast can help to invite inter-site QAs to make pre-reservation and minimize the service disruption caused by re-routing the data path during handover. Simulation results show that the proposed scheme over HMIPv6 is more suitable for real-time services than the famous RSVP tunnel-based solution.     

QoS Management Structure for Mobile IPv6

1IntroductionMobile users want to enjoy multi media and other real-ti me services in the Internet . Thus the Internet Engi-neering Task Force (IETF) has introduced the MobileIPv4[1]and Mobile IPv6[2]to interoperate seamlesslywith protocols that provide real-ti me services in the In-ternet. Multi-Protocol Label Switching ( MPLS) is afast label-based switching technology that integrates thelabel-swapping paradigm with network-layer routing[3].Resource Reservation Protocol ( RSVP)[4 ~…     

基于3GPP2框架的无线移动网络的RSVP扩展研究

本文讨论了面向固定网络设计的RSVP协议应用于无线移动网络需要解决的问题,并针对3GPP2框架下的无线移动网络提出了一种RSVP扩展方案.该方案采用隧道预留技术建立端-端主动预留,为数据连接提供服务质量保证;采用移动预测和被动预留技术在移动节点可能进入的蜂窝内提前预留无线资源,提高切换成功的概率;通过采用主动切换技术减小预留路径调整的时间,进一步提高通信的连续性.     

An Efficient RSVP–Mobile IP Interworking Scheme

During the past years, several attempts have been made to develop functionality for mobility management support and QoS provision in the realm of the IP networks. Since IP was not designed to support such functionality, new protocols have been specified and implemented to tackle these issues. Mobile IP is currently the dominant protocol that allows users to retain connectivity while roaming in IP networks. RSVP (Resource reSerVation Protocol) is a well established protocol for reserving network resources to support QoS requirements. These protocols, when deployed separately, can work quite efficiently. However, if their functionality is combined, several inefficiencies arise in terms of QoS deterioration and misuse of the network resources. To minimize these inefficiencies, we propose a new approach that limits mobility and QoS related network modifications inside the domain, in which a user moves. The deployment of our scheme enhances the network resource usage efficiency, while minimizing the duration of the QoS deterioration experienced after a terminal movement. To quantify the advantages of our proposal, we have developed an analytical and a simulation model that we also present in this paper.     

RSVP extensions for real-time services in wireless mobile networks

Currently, the RSVP model, which is efficient resource reservation in the fixed endpoints, becomes invalid under host mobility. We investigate the problems of standard RSVP in providing real-time services in wireless mobile networks. We also observe carefully how to interoperate IntServ services over DiffServ networks, and how to map IntServ QoS parameters into a wireless link. We then identify the advantages and drawbacks of the existing RSVP proposals to support QoS under both micromobility and macromobility. We finally propose a dynamic resource allocation scheme for reducing service disruption of real-time applications due to frequent mobility of a host     

Quality-of-service mechanisms in all-IP wireless access networks

In this paper, we focus on resource reservation protocol (RSVP)-based quality-of-service (QoS) provisioning schemes under Internet protocol (IP) micromobility. We consider QoS provisioning mechanisms for on-going RSVP flows during handoff. First, the rerouting of RSVP branch path at a crossover router (CR) at every handoff event can minimize resource reservation delays and signaling overheads, and in turn the handoff service degradation can be minimized. We show that RSVP branch path rerouting scheme could give a good tradeoff between the resource reservation cost and the link usage. Second, the new RSVP reservation can be made along the branch path toward the CR via a new base station in advance, while the existing reservation path is maintained, and in turn the on-going flow can be kept with the guaranteed QoS. We also show that seamless switching of RSVP branch path could provide the QoS guarantee by adaptively adjusting the pilot signal threshold values. Third, during RSVP resource reservation over wireless link, dynamic resource allocation scheme is used to give a statistical guarantee on the handoff success of on-going flows. We finally obtain the forced termination probability of guaranteed service flows, the average system time of best effort flows by using a transition rate matrix approach.     

Architecture for mobility and QoS support in all-IP wireless networks

Mobility management and quality-of-service (QoS) provisioning are the important tasks on the future development of wireless networks. The high host mobility makes these tasks more challenging. In this paper, we propose an architecture which supports both mobility and QoS management in Internet protocol (IP)-based wireless networks. In mobility management, the fast handoff, which the packets are forwarded in advance to the neighboring locations where a mobile node (MN) may move to, is provided to reduce the service disruption. Also, the fast location lookup, which the routing information about a MN is replicated to some routers, is provided to avoid the triangular routing problem incurred by the protocol of mobile IP. In QoS provisioning, we enable the end-to-end QoS guarantee by using the resource reservation protocol (RSVP) signaling. In particular, the RSVP aggregation technique is used to avoid the scalability problem. Also, the technique of passive resource reservation is used to reduce the influence of host mobility on the resource reservation delay. We emphasize the integration of mobility and QoS management in the architecture design. A performance analysis is given to justify the benefits of our proposed architecture.