支持多业务等级的NGIIP-VPN业务管理系统体系结构

为了实现对下一代互联网IP—VPN业务服务质量分等级的有效管理，定义了IP—VPN业务的服务等级，提出了下一代互联网支持多业务等级的IP—VPN业务系统的体系结构，并详细描述了各个组成部分．     

基于业务感知的下一代互联网QoS控制架构及关键技术

下一代互联网是业务驱动的融合网络,提供具有不同QoS需求的IP业务是其面临的关键问题之一.本文针对下一代互联网"业务丰富多变、网络加速融合"的特点,面向下一代互联网建设、融合和应用中面临的多业务承载、业务感知识别、服务质量区分保障和网络流量控制管理等问题,建立了业务智能感知模型,对各种新型业务流量的QoS控制架构及关键技术做了研究.     

基于工作流管理和策略管理的下一代互联网IP业务管理系统体系结构及应用

为了实现下一代互联网IP业务的业务流程自动化、业务管理灵活性和动态性,适应新业务的可扩展性和对业务的有效管理,在WfMC工作流参考模型和IETF策略框架的基础上,提出了基于工作流管理和策略管理的下一代互联网IP业务管理系统的体系结构,详细分析了体系结构中的构成组件和相关功能,并给出了基于该体系结构的NGIIP业务开通管理流程场景的应用实例。     

城域网智能业务平台的嵌入式IP QoS技术

传统的IP网络缺乏有效的管理和运营手段，不仅面临着安全、 QoS等方面问题，也不能承载语音、多媒体等电信业务。VPN、 QoS等新技术的应用大大增强了互联网的安全性和服务质量，使得Everyching over IP成为可能。在宽带城域网中，城域网智能业务平台（汇聚层高端路由设备）担负着网内所有用户到骨干网的流量交换，需要较大的整机交换容量，同时还要对所有数据进行安全， QoS等处理。如何在不影     

端到端IP QoS业务平台网络架构

随着互联网的快速发展，基于IP的业务越来越丰富，未来各种业务统一到IP平台是网络发展的大趋势。以多媒体、语音、视频等为代表的应用对IP网的性能提出了更高的要求，要求网络提供服务质量(QoS)保证。当前IP网所提供的是“尽力而为”(best-effort)的服务，由于不具备服务质量保障特性，不能预留带宽，不能限定网络时延，因此无法支持许多新的应用。     

IP over WDM网光层QoS业务映射模型设计

在IP over WDM网络中,WDM光网作为底层传送网络,目前还不能完全解析IP层对业务QoS区分等信息.针对IP和WDM网络中两种不同的QoS机制,应用IP网络差分服务模式,通过UNI接口汇聚来自IP网络的流量,将其映射为光域中相似的业务需求,在光域中为不同QoS业务提供不同QoS保障的光连接通道,实现了WDM网络层的QoS区分服务.     

一种在Internet网络上承载QoS业务的体系模型──综合服务模型

对综合服务模型这种可以在TCP／IP网络上承载QoS的体系结构作了全面的介绍，对它提供的业务类型，体系结构，及如何实现作了系统的阐述。     

通信网业务质量(QoS)的涵义

文章首先对通信网的业务质量(QoS,qualityofservice)作概要说明,接着分别简单介绍业务分类(CoS,classofservice)和业务等级(GoS,gradeofservice)以及IP通信网QoS结构中IntServ(integratedservices)和DiffServ(differentiatedservices)两种业务的情况。     

下一代网络中增值业务的实现

介绍了下一代网络的体系结构和软交换技术在下一代网络中的应用，以及下一代网络中增值业务的两种实现方法，与智能网互通提供增值业务及利用应用服务器提供增值业务，下一代网络中可实现的增值业务包括：基于IP的多媒体业务，利用API开发的增值业务，IP呼叫中心及E-COntent业务等。     

GPRS业务和计费系统

本文描述了GPRS系统的网络组成，GPRS业务，GPRS计费数据的采集传输和处理,计费及结算原则，并对GPRS上的IP网络服务质量（QoS）进行了探讨。     

因特网IP QoS机制及其在UMTS网络中的应用

目前广泛使用的因特网协议(IP)已经成为所有数据业务的传输标准。传统的因特网业务策略(BE策略)不能满足新兴的实时业务的需求,因此有必要引入IPQoS机制来更有效的分配资源。由于第三代通信系统网UMTS需要同时支持非实时和实时业务,而且无线网的资源和设备比固定网昂贵得多,所以IPQoS机制对于无线网络尤为重要。文中首先研究因特网IPQoS机制,然后讨论如何将其应用到UMTS网络中。     

Differentiated integrated QoS control in the optical Internet

In order to facilitate convergence of networks and services, this article investigates a new hybrid and integrated QoS control scheme that combines electrical IP layer features with reconfigurable optical layer, and addresses cross-layer design on QoS control in optical Internet (i.e., IP/WDM networks). The proposed integrated QoS control scheme can not only provide appropriate transport service for various types of traffic relating to different service categories in a cost-effective way, but also maintain high flexibility/scalability for integrated services provisioning, which seems to be preferred for QoS provisioning in the next-generation multiservice integrated optical Internet.     

从公路网的视角看IP QoS

本文从公路网的视角重新认识IP QoS问题,提出了互联网所需要和所能提供的是一种适合的、相对的、统计意义上的IP服务质量保证能力,并分析目前在网络实际应用中有助于改善IP QoS一些方法的成功之处,包括提高网络的硬件通行能力、提供差异化的服务质量保证、提高网络对流量的控制能力,最后讨论公路网对IP QoS下一步研究的一些启示.     

QoS enabled voice support in the next generation Internet: issues,existing approaches and challenges

The Internet is under rapid growth and continuous evolution in order to accommodate an increasingly large number of applications with diverse service requirements. In particular, Internet telephony, or voice over IP is one of the most promising services currently being deployed. Besides the potentially significant cost reduction, Internet telephony can offer many new features and easier integration with widely adopted Web-based services. Despite these advantages, there still exist a number of barriers to the widespread deployment of Internet telephony. The most prominent one, however, is how to ensure the QoS needed for voice conversation. The purpose of this article is to survey the state-of-the-art technologies in enabling the QoS support for voice communications in the next-generation Internet. In this article, we first review the existing technologies in supporting voice over IP networks, including the basic mechanisms in the IETF Internet telephony architecture and ITU-T H.323-related Recommendations. We then discuss the IETF QoS framework, specifically the Intserv and Diffserv framework. Finally, we present two leading companies' (Cisco and Lucent) solutions to offering IP telephony services as examples to illustrate how real systems are implemented     

IP网络承载物联网业务能力研究

物联网的通信量将成为未来IP网络流量的重要组成部分,必将对IP网络承载能力产生深远影响。物联网应用的复杂性和多样性也对网络"服务质量、安全可信、可控可管"等各个方面提出了更高的要求。文章对物联网业务承载能力及业务需求进行了分析,对IP网络承载物联网业务相关能力进行了研究和探讨。同时指出为适应未来大规模物联网业务的承载,需要进一步提升电信级的IP网络能力。     

A Bandwidth Control Method Providing Entrance QoS for Multimedia Communication

1 Motivation Nowadays , the QoS provided by the wideband IPnetwork starts at an edge-router and ends at anotheredge-router .Therefore ,the trunk QoSisfinished,suchas RSVP[1]and DiffServ[2].In order to complete theend-to-end QoS,the mechanism of entrance QoS (thebandwidth controller) is introduced. As Fig.1 shows ,if the bandwidth controller circledby the dashed frame is not used,the Ethernet is con-nected with the router directly through 100 Mbit/sbandwidth. Then this router is connect…     

Toward IP virtual private network quality of service: a service provider perspective

To complement classical enterprise wide area network infrastructures, IP (based) virtual private networks have been gaining ground, with the capability of offering cost-effective, secure, and private-network-like services. In order to provision the equivalent quality of service of legacy connection-oriented layer 2 virtual private networks (VPNs), IP VPNs have to overcome the intrinsically best effort characteristics of the Internet in this multimedia era. This article discusses the IP VPN quality of service (QoS) issue from a service provider point of view, where QoS guarantees are carried out at the network level as well as at the node level. It presents the whole picture by highlighting and stitching together various QoS enabling technologies from previous research and engineering work.     

Internet Multicast Video Delivery

Internet video delivery has been motivating research in multicast routing, quality of service (QoS), and the service model of the Internet itself for the last 15 years. Multicast delivery has the potential to deliver a large amount of content that currently cannot be delivered through broadcast. IP and overlay multicast are two architectures proposed to provide multicast support. A large body of research has been done with IP multicast and QoS mechanisms for IP multicast since the late 1980s. In the past five years, overlay multicast research has gained momentum with a vision to accomplish ubiquitous multicast delivery that is efficient and scales in the dimensions of the number of groups, number of receivers, and number of senders. This work presents an overview of the issues facing both IP and overlay multicast and the approaches that researchers are taking to solve them. Many of these approaches take advantage of a rich interface, beyond a single rate video stream, between the coding and delivery mechanisms. The semantics of this interface is an important question for future research and we discuss this with insight from experience on delivery technologies.     

IP电信网的QoS技术

目前的IP网络的服务模式是应力而为的，不保证服务质量，因此组建IP电信网的一个关键技术难题就是如何保证服务质量，文章介绍了目前业界所提出的一些为IP电信网提供服务质量的一些技术，包括InterServ,DiffServ，MPLS，LANQoS等，并介绍了一种实用的QoS服务器结构。     

Controlled use of excess backbone bandwidth for providing new services in IP-over-WDM networks

We study an approach to quality-of-service (QoS) that offers end-users the choice between two service classes defined according to their level of transmission protection. The fully protected (FP) class offers end-users a guarantee of survivability in the case of a single-link failure; all FP traffic is protected using a 1:1 protection scheme at the wavelength-division multiplexing (WDM) layer. The best effort protected (BEP) class is not protected; instead restoration at the IP layer is provided. The FP service class mimics what Internet users receive today. The BEP traffic is designed to run over the large amounts of unused bandwidth that exist in today's Internet. The goal is to increase the load carried on backbone networks without reducing the QoS received by existing customers. To support two such services, we have to solve two problems: the off-line problem of mapping logical links to pairs of disjoint fiber paths, and an on-line scheduling problem for differentiating packets from two classes at the IP layer. We provide an algorithm based on a Tabu Search meta-heuristic to solve the mapping problem, and a simple but efficient scheduler based on weighted fair queueing for service differentiation at the IP layer. We consider numerous requirements that carriers face and illustrate the tradeoffs they induce. We demonstrate that we can successfully increase the total network load by a factor between three and ten and still meet all the carrier requirements.