层次化移动IPv6环境中的QoS机制

本文针对层次化移动IPv6的网络提出了一种QoS信令，为移动节点提供服务质量的保障。在分析了RSVP信令的特点及其由于对多播的支持而增加的复杂性的基础上，设计了一个简化的RSVP信令，然后把此RSVP信令和层次化的移动协议相结合提出了一个综合的QoS切换方案，并在层次化的移动环境下，对此QoS信令和其它几种QoS机制在资源预留时间和信令负荷方面进行了性能比较。     

一种基于RSVP协议的资源提前保留技术

IETF提出使用RSVP协议确保能在Internet上得到QoS。但由于RSVP协议是面向接收者的，接收者可能会由于不清楚整个路径的情况而做出超要求，从而使得需求被拒绝的机会变大。提出了一种基于RSVP的资源提前保留技术，能在一定程度上弥补RSVP资源预留模式的不足。     

多媒体应用的网络需求及新一代网络技术综述

首先分析了多媒体应用的网络需求,包括带宽、QoS和多播支持,然后介绍了一些现有网络技术和协议,包括新的通信技术、RSVP(资源预留协议)和多播路由选择协议MOSPF和PIM等.     

协调路由和资源预留机制的实时多播协议

流媒体应用程序必然涉及网络上的实时任务处理。在一般情况下每个数据流都有很多接收端,因此确保网络传输的时间限制的多播资源预留协议非常必要。提出了一个针对一对多,即一个发送端、多个接收端的实时多播协议,因为未涉及到多对多的情况,故称为简单实时多播协议。协议通过将路由机制和资源预留机制用一个通用接口协调起来,提供了一个更为灵活的连接建立方式,并同其它已存在的流媒体协议如RSVP、ST-II进行比较和分析。     

异质网络环境中的视频主动分级多播

提出了一种基于RSVP（资源预留协议）和MPEG-4的可扩缩性的视频主动分级多播方案.在集成服务环境中,该方案通过检测网络QoS来判断不同用户所能接收的视频QoS,并使用RSVP在分流节点上实现分级投递.实验结果表明,视频主动分级多播能够充分利用网络资源的同时避免网络拥塞,使得每个用户都能得到合适的服务.     

全IP移动网络中的动态资源预留机制与QoS研究

全IP移动网络中的Qos是最近的研究热点之一，其中资源预留协议（Resource Reser Vation Protocol，RSVP）是一个关键技术。为了保证切换时的QoS，需要进行资源预留。针对RSVP不适应移动环境的缺点，文中在全IP移动网络的接入网的微移动域中，提出一种动态资源预留的QOS解决方案，实现微移动协议和RSVP协议之间的互操作。当有多个移动主机需要进行预留时，需要对它们进行优先级排序。文中提出了一种在全IP移动网络中基于信令预测优先级排队的动态排序算法．以有效地对多个移动主机进行资源预留。仿真结果表明文中提出的算法的有效性。     

全IP移动网络中的动态资源预留机制与QoS研究

全IP移动网络中的QoS是最近的研究热点之一,其中资源预留协议(Resource ReserVation Protocol,RSVP)是一个关键技术。为了保证切换时的QoS,需要进行资源预留。针对RSVP不适应移动环境的缺点,文中在全IP移动网络的接入网的微移动域中,提出一种动态资源预留的QoS解决方案,实现微移动协议和RSVP协议之间的互操作。当有多个移动主机需要进行预留时,需要对它们进行优先级排序。文中提出了一种在全IP移动网络中基于信令预测优先级排队的动态排序算法,以有效地对多个移动主机进行资源预留。仿真结果表明文中提出的算法的有效性。     

资源预留协议在移动IP中的应用

文中讨论了在移动环境下标准RSVP所存在的问题，并对现有的几种解决方案进行了描述和分析。随后介绍了简单资源预留协议的工作过程，并提出了一种在移动IP中提供实时服务QoS的简单资源预留协议与移动IPv6的集成模型。     

一种具有双重QoS保证的VOD流媒体系统结构

文中提出了一种基于IP网络具有双重QoS保证的VOD流媒体系统结构.此结构使用RSVP协议对流媒体预留资源,资源预留采用基于节的资源管理方法;服务器端通过RTP协议传输实时多媒体数据流,RTCP协议监视传输服务质量进行动态QoS控制,因此对基于IP网络的VOD系统的流媒体传输QoS提供了双重保证.其客户端使用SDP协议取得流媒体文件描述信息和组播地址,通过RTSP协议与流媒体文件服务器交互,建立和控制多媒体会话.     

RVSP基于H.323协议VoIP系统的QoS应用

本文着重介绍了资源预留协议(RSVP)在H.225的RAS协议、H.245协议和RSVP的同步问题等几个方面的应用策略,对基于H.323的VoIP系统中RSVP过程进行了较为详细的分析。     

RSVP协议上的ELSD代价分配方案

本文讨论ＲＳＶＰ协议（资源保留协议）在多点播送分布树环境下的ＥＬＳＤ代价分配方案,问题是,当一个数据流在多个接收者之间共享时,如何在使用者之间分割充的网络代价,根据ＲＳＶＰ协议所能建立的三种不同的资源保留类型,本文分别给出了简单ＥＬＳＤ和加权ＥＬＳＤ两种不同的代价分配方案,以求得在接收者之间公正,合理地分配代价,达到制约使用者合理使用资源的目的。     

Extending RSVP for quality of security service

The resource reservation protocol (RSVP) lets hosts request quality of (bandwidth) service for multicast applications on the Internet. As network equipment advances to provide improved bandwidth service, security service becomes the more critical problem. However, RSVP doesn't provide a flexible mechanism to support quality of security service (QoSS). Security service RSVP extends RSVP to provide the needed mechanism for dynamically negotiating QoSS among the senders and receivers of multicast applications on the Internet. SSRSVP provides different QoSS resolutions according to receiver nodes' security service needs.     

RSVP协议在移动IPv6网络中的扩展性研究

针对无线移动通信的特点,提出了一种在移动IPv6网络中保障用户通信服务质量的资源预留新方案Fast RSVP.该方案采用跨层设计的思想,将两个不同层次的模块:移动IPv6模块和RSVP模块结合起来,通过在两个模块之间增加一些原语使得二者配合工作以保证移动用户的通信业务质量.Fast RSVP方案引入了邻居隧道提前资源预留、优化路径资源预留、切换预留、路径融合等一系列新机制.仿真实验结果表明,与其他移动环境中的RSVP扩展方案相比,该Fast RSVP方案在支持无线移动通信方面具有如下优势:(1)能够实现移动节点带有服务质量保证的快速切换;(2)能够避免移动IP切换过程中三角路由和重复预留造成的资源浪费;(3)能够区分不同类型的切换预留请求,在保证网络整体性能的前提下显著降低因为切换而导致的服务中断率.     

资源预订协议RSVP和ST—Ⅱ的分析和比较

文章介绍了Ｉｎｔｅｒｅｎｔ网络中支持资源预订的协议ＲＳＶＰ和ＳＴ－Ⅱ的基本原理和工作过程，并对这两种预计协议的特性作了分析笔比较，阐述了这两种协议在多种体通信中应用前景。     

MQ: an integrated mechanism for multimedia multicasting

This paper studies the integration of multimedia multicasting, with the consideration of multicast with end-to-end QoS guarantees by resource reservation, dynamic join and departure of participants, user heterogeneity, scalability, robustness, and loop-free control. A protocol called MQ, Multicast with QoS, is proposed to support multimedia group communications with QoS guarantees for heterogeneous recipients. With MQ, while resource reservation is de-coupled from QoS multicast routing, they are integrated in a way to avoid the problem of “sender-oriented” path determination, a problem that occurs when RSVP is used in conjunction with QoS routing for heterogeneous reservations. Being a truly receiver-oriented and integrated scheme for multimedia multicasting, MQ supports such integration in a robust, scalable and loop-free way. It also accommodates heterogeneous users with varied QoS, dynamically adjusts QoS trees to improve resource utilization, and guarantees end-to-end QoS requirements. We have conducted simulations to evaluate the performance of the proposed mechanism. MQ demonstrates its advantages over the conventional loosely coupled integration of TP multicasting, resource reservation and QoS routing, in terms of better accommodation of heterogeneous users, higher scalability, lower blocking probability for users to join groups with service guarantees, and more efficient resource utilization to enhance system performance     

确保业务质量的重要协议—RSVP

主要讨论Internet网中确保业务质量的重要协议即资源预约协议的基本原理和工作过程，阐明了该协议在多媒体通信中应用前景。     

QoS Filtering and Resource Reservation in an Internet Environment

Multimedia group applications often operate in an environment where the various participants are located on systems and communication links with different capabilities. Mechanisms are required that ensure full-quality media for high-performance workstations but lower-quality media for playout at low-end systems. QoS filters have been proposed as a way to adapt QoS to the user specified level by changing the structure of a media stream in a well defined way. Resource reservation and QoS filter instantiation should be closely integrated since both represent one particular aspect of the provision of individualistic QoS for heterogeneous users in multipeer communications. The Internet reservation protocol RSVP is receiver oriented and allows each receiver to specify its resource requirements. However, no actual mechanisms are defined that adapt the data stream to the receiver specified QoS requirements.In this paper we present an enhanced version of RSVP (called RSVP++) that integrates resource reservation and QoS filter control. In order to achieve this integration we extend the RSVP functional model and define a new QoS service class. RSVP++ can coexist with common RSVP systems, thus, openness and interoperability of the system are ensured.     

Performance evaluation framework for IP resource reservation signalling

This paper investigates the scalability limitations of signalling-based Quality of Service (QoS) provisioning using the RSVP and Boomerang protocols as examples. We establish a performance evaluation framework, which contains per hop metrics for describing the router’s signalling capability and per reservation metrics for characterising the overall performance of the reservation protocol. The per hop metrics are captured in a simple router model, using parameters that are based on actual measurements. This router model is used in a simulation scenario, which characterises the end-to-end impact and overall performance of the RSVP and Boomerang reservation protocols.

This paper summarises the results of router benchmarking measurements and simulations. The per session results highlight that, with thorough selection of the control protocol, signalling-based resource reservation is a realistic approach in the Internet. It is also shown that the selection of the signalling protocol can seriously influence the reservation performance of a router and thus the overall performance of the entire network as well. The presented performance evaluation framework can be used for network dimensioning and it can even aid the design of new resource reservation protocols and new router devices.