路由器并行交换体系结构的研究

介绍高速路由器IP报文的处理流程和各处理单元的处理要求,对各处理单元采用的体系结构进行了详细分析和讨论,最后给出高速路由器报文输入,输出的并行处理实现方案。     

路由器体系结构发展与关键技术分析

随着IP技术和Internet网络的发展,路由器已经成为通信网络的核心设备,其技术也获得了极大的提高与发展。主要介绍了路由器体系结构从第一代到第五代,直至今后光IP路由器的技术发展,分析并讨论了骨干路由器的多种关键技术。     

云计算概念、模型和关键技术

云计算指IP技术架构下的网络计算,其本质是ICT业务的一种新的应用方式。绝大数企业和运营商的数据中心的改造将是云计算未来发展的主要任务：使云计算技术更为普遍和更为广泛地为绝大部分企业、机构、团体和运营商服务。云计算技术将不仅提供传统意义的IT资源和应用服务,而且将支持包括IT、通信、电视、移动和物联等一切互联网技术融合后的资源使用和业务应用。云计算发展的关键技术主要有统一交换构架、统一虚拟化和统一计算系统,云计算发展的战略推手将是组建开放产业联盟和推动开放技术标准。     

电力系统区域网的分析与计算方法

本文在电网络理论的基础上,提出了一种分析计算大规模电力系统区域网的方法,文中首先应用网络分块结点抑制法推导出区域网等效结点电压方程式。然后,列举一个小规模的网络来说明应用这种方法计算的过程。这种方法适用于大规模电力系统区域网的计算．它可以减少计算工作量,提高计算速度。     

可扩展的多业务体系结构

多业务运营成为有线网络运营的必然发展方向,本文通过分析多业务运营所需的产业环境和网络体系结构,介绍可扩展性的重要作用和关键实现路线,并给出相应的解决方案建议。     

基于UML的面向服务体系结构建模方法

本文介绍了面向服务体系结构产生背景及其基本概念，详细分析了它的基本结构和所涉及的操作。提出了一种基于统一建模语言的面向服务体系结构的建模方法，并结合一个ECC协同商务平台的实例进一步阐述了如何利用UML建模面向服务的体系结构。     

基于存储区域网(SAN)的数据备份

随着网络基础建设的逐步发展与完善，网络存储由于其自身的诸多优点正得到越来越广泛的应用。本文介绍了存储区域网以及数据备份系统的组成，并着重阐述了如何利用SAN技术来进行数据备份。     

可扩展路由器中SPT并行计算的实现

随着互联网的飞速发展,集群结构的下一代核心路由器已经成为研究的重点.在可扩展路由器中(cluster router),并行路由算法是关键问题之一.对于广泛部署的OSPF协议,最短路径树(SPT)的并行计算是其并行化的核心难点.本文提出了一种计算最短路径树的算法－分区Dijkstra算法(D-D),分析了算法性能,并通过模拟实验验证了算法的性能.     

CPU+多GPU异构协同计算的体系结构研究

以CUDA架构为例,对传统的CPU+单GPU架构进行了分析,提出了一种CPU+多GPU异构协同计算的系统方案,对关键的CPU对多GPU的管理及多GPU间数据通信等问题做了重点讨论,从理论上进行了可行性分析,并提出了相应的优化方法.     

一种用于高速路由器大容量交换系统的调度算法

介绍了一种用于高速路由器大容量交换系统的高效调度算法,并对其性能进行了分析和比较。     

A programmable router architecture supporting control planeextensibility

The Internet is evolving from an infrastructure that provides basic communication services into a more sophisticated infrastructure that supports a wide range of electronic services such as virtual reality games and rich multimedia retrieval services. However, this evolution is happening only slowly, in part because the communication infrastructure is too rigid. In this article we present a programmable router architecture in which the control plane functionality of the router can be extended dynamically through the use of delegates. Delegates can control the behavior of the router through a well-defined control interface, allowing service providers and third-party software vendors to implement customized traffic control policies or protocols. We describe Darwin, a system that implements such an architecture. We emphasize the runtime environment the system provides for delegate execution and the programming interface the system exports to support delegates. We demonstrate the advantages of using this system with two delegate examples     

GMPLS-based photonic multilayer router (Hikari router)architecture: an overview of traffic engineering and signalingtechnology

A new extended signaling and traffic engineering method for the GMPLS-based photonic and electrical multilayer router (Hikari router) is proposed. The method allows dynamic optical network management and photonic signal recovery, such as regeneration, reshaping, etc., to be realized adaptively. Wavelength conversion is also adaptive, which reduces network cost. Multilayer traffic engineering, which yields the dynamic cooperation of IP and photonic layers, is described to provide IP services cost effectively. To realize multilayer traffic engineering, we propose the OSPF extension, which advertises both the number of total wavelengths and the number of unused wavelengths, and the RSVP-TE extension, which minimizes the number of wavelength conversions needed. In addition, this paper proposes a heuristics-based multilayer topology design scheme that uses IP traffic measurements in a generalized multi-protocol label switch (GMPLS). The proposed scheme yields the optical label switch path (OLSP) network topology, that is, OLSP placement, that minimizes network cost, in response to fluctuations in IP traffic demand. In other words, the OLSP network topology is dynamically reconfigured to match IP traffic demand. Networks are reconfigured by the proposed scheme so as to utilize network resources in the most cost effective manner     

Scalable multi-QoS IP+ATM switch router architecture

This article proposes a scalable multi-QoS IP+ATM switch router architecture. The proposed switch router is based on a core ATM switching system with multi-QoS capability. Forwarding engines and a routing engine are attached in front of the line cards of the ATM switching system. The FEs and RE are interconnected with each other via internal VCs. A novel longest matching algorithm is employed at the FE to achieve packet forwarding at wire-speed of OC-12c rate (622.08 Mb/s). Wire-speed unicast and multicast packet forwarding are performed using point-to-point and point-to-multipoint VCs in a unified way. Because FEs and RE are decoupled from the base ATM switching system, the full spectrum of ATM QoS capability is nicely applied for IP QoS control with a packet classification at the edge of the network. The core switching fabric is scalable from 40 to 160 Gb/s capacity (371 MPPS in terms of packet forwarding throughput). Feedback rate control is employed at each line card to eliminate congestion in the high-speed core switching fabric even with a small amount of buffer.     

Vlsi architecture of a smds/atm router

This paper presents a set of custom components used to implement a connectionless service on top of an atm network. In a first part, the chosen architecture is described, together with the level of performance requested. Then we analyze how the architecture and other constraints influence the chip partitioning. Finally the three custom devices developed for this application are succinctly described.     

Design of programmable NoC router architecture on FPGA for multi-cluster NoCs

The next generations of massive, parallel and reconfigurable multi-cluster chips need performance and flexibility, requiring new communication schemes. According to this scenario, a programmable router architecture for networks-on-chips is presented. Results indicate that the proposed router has low area occupation, low power consumption and a high data throughput.     

一种高可扩展的软件定义网络控制平面架构

作为一种新型网络创新架构,软件定义网络(SDN)为研发新的网络应用和未来互联网架构提供了一种新的解决方案。目前,基于Open Flow协议的SDN架构已被越来越多的机构成功部署。随着网络规模的增大和业务需求的不断增加,控制平面的可扩展性需求越来越明显。为此,文中采用互联网分层、分割、集群、缓存的架构思想,提出了一种高可用性、高扩展性的控制平面架构方案。从数据请求、应用处理、以及全局网络视图三个抽象层次剖析了该方案,最后通过模拟实验证明了方案的可行性。     

线速路由器分组并行处理体系结构与性能分析

本文在分析路由器报文献处理需求的基础上,探讨了报文多处理模块并处理的体系结构,并以四个处理模块为例对分组处理时延做了定量分析和仿真。分析表明,当各模块处理能力总和与单独模块结构处理能力相同时,多模块结构处理时延将大于单模块结构;当各模块处理能力总和大于单处理模块结构处理能力的同时,系统处理的时延特性可得到明显改善,并且系统具有较好的可扩充性。     

A service architecture for ATM: from applications to scheduling

This article derives a rationale for the service architecture of the ATM Forum's Traffic Management 4.0 specification. This model distinguishes a small number of general ways to provide quality of service (QoS) which are appropriate for different classes of applications. We construct the set of ATM service categories by first analyzing the QoS and traffic requirements for a reasonably comprehensive list of applications. The most important application properties and the complexity of the related network mechanisms are used to structure the services. This method has the desirable property that the number of service categories does not expand rapidly with the introduction of new applications. We also discuss packet scheduling as the key component for realizing such a set of services, and report on an experimental realization of a fair queuing scheduler     

一种实现LAR协议的路由器架构设计

LAR （Location-Aided Routing）协议是一种适用于无线移动自组网的路由协议.介绍了当前传统的路由器架构,实现LAR协议路由器的需求,并提出了一种实现LAR协议的、基于Linux架构的路由器架构设计.