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.     

应用RSVP提高视频会议系统业务传输质量

传统的IP网络基于尽力而为的设计思想,不对上层承载业务提供任何服务质量保障。而视频会议应用对服务质量要求相对严格,延迟及延迟抖动会降低用户的应用体验。针对基于IP网络的视频会议系统中缺少服务质量保障的问题,提出了在视频会议系统中部署资源预留协议以提供服务质量保障的方案,并且在Vxworks系统中完成资源预留协议的开发。为了验证方案效果,分别在中度负载和重度负载的情况下对业务性能进行测试。测试结果表明,该方案能够为视频会议系统提供有效的服务质量保障。     

基于非线性服务曲线的RSVP资源分配方式

本文主要针对基于RSVP的保证服务，讨论了如何利用非线性服务曲线进行资源分配，以实现带宽和时延要求的解耦。提出了一种简单有效的非线性服务曲线，数值分析结果表明就资源利用率而言，其性能远远优于传统的线性服务曲线。最后论文讨论了未来的发展趋势并给出了有待研究的一些课题。     

支持IPv6／RSVP的网络中基于数字视频的教育服务

为了保证基于数字视频的教育服务的网络的服务质量,更好地提升Internet的网络性能,使综合数据的传输更加流畅,将IPv6相对于IPv4的优势和RSVP对的QoS支持两方面结合起来,提出了支持IPv6／RSVP的网络中基于数字视频的教育服务的基本设计思想、系统总体框架结构与技术实现,并给出了视频教育服务体系结构、通信协议栈和资源预留的实现方式。该方法在拟定的实验环境下能实现预期目标,并被证明了有为基于教育服务的视频提供端对端服务质量的可能性。     

Fast RSVP: Efficient RSVP Mobility Support for Mobile IPv6

In recent years, with the development of mobile communication technologies and the increase of available wireless transmission bandwidth, deploying multimedia services in next generation mobile IPv6 networks has become an inevitable trend. RSVP (resource reservation protocol) proposed by the IETF is designed for hardwired and fixed networks and can not be used in mobile environments. This paper proposes a protocol, called Fast RSVP, to reserve resources for mobile IPv6. The protocol adopts a cross-layer design approach where two modules (RSVP module and Mobile IPv6 module) at different layers cooperate with each other. Fast RSVP divides a handover process with QoS guarantees into two stages: (1) setup of the resource reservation neighbor tunnel and (2) resource reservation on the optimized route. It can help a mobile node realize fast handover with QoS guarantees as well as avoid resource wasting by triangular routes, advanced reservations and duplicate reservations. In addition, fast RSVP reserves “guard channels” for handover sessions, thus greatly reducing the handover session forced termination rate while maintaining high performance of the network. Based on extensive performance analysis and simulations, Fast RSVP, compared with existing methods of resource reservation in mobile environments, performs better in terms of packet delay and throughput during handover, QoS recovery time after handover, resource reservation cost, handover session forced termination rate and overall session completion rate.     

RSVP and integrated services in the Internet: a tutorial

The growing use of multimedia communication applications, with specific bandwidth and real-time delivery requirements has created the need for an integrated services Internet in which traditional best-effort datagram delivery can coexist with additional enhanced quality of service (QoS) delivery classes. Such classes provide data flows with QoS commitments with regard to bandwidth, packet loss, and delay through the reservation of network resources along the data path, which can be done using the Resource Reservation Protocol (RSVP). This article is a tutorial on how RSVP can be used by end applications to ensure that they receive the end-to-end QoS that they require     

Dynamic RSVP protocol

RSVP is a resource reservation setup protocol that can be used by a host to request specific QoS for multicast multimedia flows on the Internet. Multiprotocol label switching (MPLS) architecture also needs RSVP. The fact that the resolutions of the display system used in different receiver nodes might have different, multi-resolution characteristics is supported in the MPEG-4 standard, and the EZW compression algorithm can cease decoding at any point in the bitstream. However, RSVP does not provide a more flexible mechanism. In this article we propose an extension of RSVP to provide the needed mechanism, coined dynamic RSVP (DRSVP), to dynamically adjust reserved resources on nodes without much effort. It provides different video resolutions to different receiver nodes with different needed reserved resources. Therefore, it does not waste precious Internet resources to transmit unnecessary multimedia packets.     

RSVP与Internet多媒体通信

Ｉｎｔｅｒｎｅｔ作为一个具有深远影响力和不断发展的信息资源网,如何提供实时多媒体通信服务已成为世界各国通信界竞相研究的重点。ＲＳＶＰ（资源预留协议）研究的主要目的正是将综合业务引入Ｉｎｔｅｒｎｅｔ网络,因而一经提出便受到国内外学者的普遍关注,本文简要描述了ＲＳＶＰ协议与多媒体通信的关系及其在多媒体通信系统中的作用。     

IP QoS 技术: RSVP与 DiffServ的分析与比较

首先对 IP网络现有的两种最重要的 QoS技术,即 RSVP与 DiffServ的各自特点和原理进行分析,然后再对其适用范围、优缺点作比较,最后对实际网络应用中两种协议的结合提出些构想.     

用于QoS的两种服务模型的集成

分析了用于QoS的两个服务模型IntServ/RSVP和DiffServ,然后针对一个具体的网络结构详细介绍了AggregationofRSVP如何解决两个服务模型之间的交互问题,描述了其工作过程并给出了时序图。     

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。     

Integrated Service Mobile Internet: RSVP over Mobile IPv4&6

While the Internet keeps its penetration into every facet of life and every corner of the globe, two things stand out. One is the hunger for high quality of services to convey audio and video data. The other is the desire for ubiquitous connections. Combining the two we have an Internet that is capable of supporting multimedia communications for nomadic users on the move. To have a high quality connection, resource must be allocated along the connection path. The current Internet standard for resource reservation is RSVP (Resource reSerVation Protocol), which is receiver-initiated and allows one-to-one or one-to-many communication to have resource reserved in the path from sender to receiver(s). To support mobile users, the Internet also has the mobile IP standard. Mobile IP allows a mobile host to roam from one subnet to another seamlessly. However, several problems need to be solved before we can support QoS communications for mobile users by applying RSVP to mobile IP. In this paper, we identify four problems related to RSVP over mobile IP. The problems are the resource pre-reservation problem, the RSVP tunneling problem, the common path identification problem, and the mobile proxy problem. We also survey the various solutions proposed by many papers.     

A NEW RANDOM PACKET ACCESS PROTOCOL IN WCDMA

In this paper, a new Random Packet Access Protocol (RPAP) is proposed in WCDMA systems. The new proposed RPAP can efficiently prevent unnecessary interference by stopping a transmission if it is bound to be collided with others. Throughput about the new RPAP is deliberated and analyzed. Computer simulation shows that this protocol has better throughput performance compared with conventional one currently used in WCDMA.     

Internet综合业务模型和资源预留协议RSVP

简要介绍了 Ｉｎｔｅｒｎｅｔ 综合业务模型的基本组成和实现机制， 并对 Ｉｎｔｅｒｎｅｔ 综合业务模型中提出的资源预留协议 Ｒ Ｓ Ｖ Ｐ 进行了简要说明和分析。     

基于FMIPv6的资源预留协议扩展研究

提出一种在无线移动环境下保障用户通信服务质量的资源预留扩展方案。该方案有效地利用了FMIPv6（Fast Handovers for Mobile IPv6）的工作过程,通过扩展FBU（Fast Binding Update）和HI（Handoff Initiate）消息,使其能够携带QoS（Quality of Service）对象,从而将移动管理和资源预留两个过程合并为一个过程。该方案引入了提前预留与公共路径利用等一系列新机制。分析结果表明,在无线移动环境下该方案能够有效地降低预留重建延迟,提高了链路资源的使用效率。     

基于SDH的ASTN资源预留实现方案

自动交换传送网络(ASTN)是一种先进的智能化网络方案。通过控制层面实现对网络分布式的管理,连接建立的机制是其关键问题之一。介绍了利用资源预留协议(RSVP-TE)实现基于SDH的ASTN的方案,并对其仿真的结果进行了分析,得出一些有重要参考价值的结论。     

扩展资源预留协议的波长选择设计方案分析

主要研究基于路径计算单元( PCE)的波长交换光网络(WSON)中的波长分配问题.提出了PAWA(PCF Assistant Wavelength Assignment)方案,在可能发生冲突的path请求上做标记,来帮助目的节点选择波长,从而避免资源冲突.最后利用离散事件模拟工具OMNeT++进行了仿真分析,相比首次命中(FF)和随机命中(RF),PAWA方案扩展了信令,降低了阻塞率,并没有增加建路延时和资源利用率.     

因特网路由协议研究综述

路由器是因特网组网的关键设备，而路由器的主要功能是运行路由协议，并与其它路由器交换路由信息形成本机上的路由表，同时根据路由表的信息正确转发分组。在Internet中，路由协议至关重要，它直接影响网络的性能。近年来，路由协议领域中开展了大量的研究工作，有力地推动了Internet的发展。本总结了当今Internet上所使用的单播、组播、QoSR、移动等路由协议的研究现状，并分析了进一步的研究方向。     

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     

Adaptive resource management in middleware: a survey

Current middleware technologies cannot meet the demands of new application areas, such as embedded and mobile systems, that require mechanisms for dealing with a changing environment. This article reviews several approaches for providing adaptive resource management for middleware. Current middleware technologies, such as the Common Object Request Broker Architecture (CORBA) and .NET (http://msdn.microsoft.com/net), mask system and network heterogeneity problems and alleviate the inherent complexity of distributed systems in many application areas. However, the recent emergence of new application areas for middleware, such as embedded systems, real-time systems, and multimedia, imposes challenges that few existing middleware platforms can meet. In particular, because they impose greater resource-sharing and dynamism demands, these application areas require more complex and sophisticated middleware. Resource sharing must be controlled and predictable to ensure that activities running on the same middleware instance have adequate resources.