一种IP网络多媒体传输方案

随着网络技术的迅速发展,图像和视频等多媒体业务已逐渐成为信息处理领域主要的信息媒体形式。IP多媒体业务就是利用IP网络(Internet、Intranet和LAN等)传送多媒体通信的业务,包括语音、数据和视频等,既有非实时业务,又有实时业务,它们对通信网络的要求并不相同。多媒体数据传输具有实时性要求,对网络传输时延和时延抖动等较为敏感。因此,网络必须对多媒体应用的分组进行特殊处理,以保证以最小的时延和时延抖动提供可预见的服务。文中从多媒体通信的特征入手,从QoS的角度介绍了综合业务和区分业务,针对它们各自的优缺点,提出了一种IP多媒体传输的解决方案。     

IP网络中的QoS研究

本文简要介绍了IETF建议的综合服务(Int-serv)／RSVP、差分服务(Diff-Serv)、多协议标记交换MPLS、业务流量工程TE等几种IP网络QoS保证方案的工作原理，并介绍了流量管理的过程和MPLS流量管理的概念。     

IP网络的IP包传输质量

IP网质量分为：1、连接建立、释放质量参数；2、IP包传输质量参数。     

宽带IP网络

高速宽带化是目前 ＩＰ网络发展的主要方向和技术热点。文章阐述了宽带 ＩＰ网络的发展目标及其所涉及的关键技术,并介绍了宽带ＩＰ网络在中国的发展概况。     

IP网络服务质量的实现

随着三网融合步伐的不断加快，IP网络的服务质量(IP QoS)受到了广泛的重视。如何合理利用IP网络的有限带宽，保证网络的Qos，是IP网络成为支撑所有业务的统一平台的关键。首先讨论了IP QoS的基本概念和主要机制，然后详细分析了目前正在研究和实施的几种QoS模型的原理及其相互关系。基于这几种模型各自的优势和不足，探讨了将它们互相结合以更好实现IP QoS的可能方案。     

DS—IP

文章首先介绍因特网区分业务ＤＳ－ＩＰ的基本概念,而后将它分别与资源预约协议ＲＳＶＰ及多规程标号交换ＭＰＬＳ进行比较,最后指其发展前景。     

IP网络的QoS通用框架及其体系结构

首先阐述了QoS体系结构的技术发展现状，然后通过引入一个通用QOS框架来讨论分布式多媒体系统环境中的服务质量问题，接着介绍了目前提出的一些QOS体系结构，最后对这些体系结构进行了评价并给出了结论。     

IP QoS中的综合业务和区分业务

IP QoS是现代互联网发展中的一项关键技术。IETF已经定义了几种体系结构以解决IP QoS的诸多问题。介绍了其中的两个主流体系结构：综合业务和区分业务，并提出将二者进行结合，从而为下一代互联网提供更好的IP QoS。     

基于NGOSS的IP网络的QoS

如何实现下一代IP网络的QoS保证是影响未来网络发展的重要问题。本综合了运营商的运营活动对用户的业务进行管理，提出里一种基于NGOSS的IP网络QoS管理模型，它通过端到端的SLA管理来达到对用户业务的QoS管理。     

由RSVP在ATM捷径上实现综合业务IP的方案

本文介绍了由ATM捷径和RSVP实现IP与ATM融合的一种可行方案。该方案可以区分服务的方式提供综合业务IP。     

IP城域传输网的特点和解决方案

介绍了城域传输网的业务要求、规划原则以及宽带多业务传输网的几种实现方案,最后提出了吉林省城域传输网的解决思路。     

MRSVP: A Resource Reservation Protocol for an Integrated Services Network with Mobile Hosts

This paper describes a reservation protocol to provide real-time services to mobile users in an Integrated Services Packet Network. Mobility of hosts has significant impact on the quality of service provided to a real-time application. The currently proposed network system architecture and mechanisms to provide real-time services to fixed hosts are inadequate to accommodate the mobile hosts which can frequently change their point of attachments to the fixed network. Mobile hosts may experience wide variations of quality of service due to mobility. To reduce the impacts of mobility on QoS guarantees, a mobile host needs to make advance resource reservations at multiple locations it may possibly visit during the lifetime of the connection. The currently proposed reservation protocol in the Internet, RSVP, is not adequate to make such reservations for mobile hosts. In this paper, we describe a new reservation protocol, MRSVP, for supporting integrated services in a network with mobile hosts.     

IP电话的若干网络技术问题

IP电话近年来发展很快。文章讨论了IP电话的若干重要的网络技术问题,如:在接收端对话音分组进行还原时采取的策略;对不同的分组给予不同的服务以及IP电话的应用层协议等。     

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。     

Architecture and Experimental Framework for Supporting QoS in Wireless Networks Using Differentiated Services

This paper describes the design and implementation of an enhanced Differentiated Services (Diffserv) architectural framework for providing Quality of Service (QoS) in wireless networks. The Diffserv architecture has been recently proposed to complement the Integrated Services (Intserv) model for providing QoS in the wired Internet. The paper studies whether Diffserv, as defined for wired networks, is suitable for wireless networks. The proposed wireless Diffserv framework takes into consideration several factors, including signaling requirements, mobility, losses, lower wireless bandwidth and battery power constraints. It identifies the need for supporting signaling and mobility in wireless networks. The framework and mechanisms have been implemented in the wireless testbed at Washington State University. Experimental results from this testbed show the validity of the proposed Diffserv model and also provide performance analyses. The framework is also designed to be extensible so that other researchers may use our implementation as a foundation for implementing other wireless network algorithms and mechanisms.     

基于IP网络音、视频流式传输的实现

提出了基于IP网络的音、视频流式传输的实现方案,对其相关技术作了分析;阐述了该方案的实现过程,并对音、视频流式传输的网络应用作了介绍.     

GDT OpenIN互通智能网解决方案

本文介绍了巨龙公司承担的“863”国家重大项目——可与IP网互通的新一代智能网业务平台,命名为OpenIN。本文对系统的技术特点、提供业务能力、业务种类和产品形态进行了全面的介绍。本系统已通过国家“863”测试。     

利用可TDM传输网承载IP分组的一种解决方案

1前言 传统的电信传输网是以时分复用(TDM)为技术基础的,话音和数据流量几乎都是通过TDM电路交换网络加以传送,但随着Internet的飞速发展,IP技术的主导地位日渐明晰,未来网络的主体架构必定是IP.     

On efficient traffic engineering with DV-based routing protocols in DiffServ-aware IP networks

In this paper, an approach to efficient traffic engineering in the DiffServ-aware network environment is proposed. We focus to distance vector-based routing protocols, considering both modifications of routing protocols needed to support path differentiation and traffic engineering methods relied on adjusting multiple per-link costs to particular network conditions. Further, a method for determining link cost of particular traffic class, as a unique generic function of the single generalized performance metric has been proposed. In order to achieve efficient traffic engineering, possible approximations of generic cost function and mappings of generalized to particular metrics have been proposed. Finally, prerequisites for implementing proposed approach have been discussed in the context of different administrative policies and time scales of their application.