嵌入式互联网络接口的设计与开发

本根据对嵌入式网络技术的最新研究与开发，探讨了嵌入式设备网络连接的结构体系和协议层次，对嵌入式设备的网络化的网络接口技术，做了详细分析，并以80C196KC和RTL8019AS为例给出了网络接口的硬件和软件实现。     

嵌入式互联网络接口的设计与开发

根据对嵌入式网络技术的最新研究与开发，探讨了嵌入式设备网络连接的结构体系和协议层次，对嵌入式设备的网络化的网络接口技术，做了详细分析，并以80C196KC和RTL8019AS为例给出了网络接口的硬件和软件实现。     

帧交换机的结构与设计

首先描述了帧交换机的一般体系结构，然后通过对ＴＩ公司的帧交换机芯片ＴＮＥＴＸ４０９０的介绍，论述了帧交换机的设计。     

互联网络视频会议设计与实现

提出了互联网络视频会议的设计框架.以基于H.323协议的视频会议为例,研究和总结了实现高质量互联网络视频会议的方法、策略技巧及行为规范.介绍了近年来在中国教育和科研计算机网(CERNET)上开展的基于H.323协议视频会议应用的典型案例.     

电力调度交换机软件系统的设计

在电力调度通信中,数字程控调度机正在得到广泛的使用。由于电力调度通信要求较高的可靠性,因而对数字程控调度机的软件和硬件敢提出了较高的要求。首先提出了数字程控调度机软件的总体结构,说明了各个软件子模块的作用。然后给出了调度机操作系统的一种新的设计方案,并详细地讨论了实现方法。最后总结了在软件系统的设计与实现中的关键问题４和解决办法。     

爱立信移动交换机X.25数据链路的设计与实现

爱立信公司是目前世界几大著名交换机生产厂家之一，本文以爱立信公司蜂窝移动交换系统ＣＭＥ２０为对象，阐述基于Ｘ．２５协议的数据链路的设计与实现。该系统可应用于计费文件的传输，建立远程操作维护终端。     

程控交换机外存储设备设计

对程控交换机的外存设备提出设计方案，具体阐述了硬件设计和软件设计。     

SINOMP:并行机互联网络通信性能模拟系统

研究并设计实现了并行机互联网络通信性能模拟系统——SINOMP。在单机系统上实现了互联网络的网络特征和通信过程的描述,提供路由选择和交换策略。通过指定目标系统的环境参数,获得目标系统互联网络在存储转发和虫蚀方式下的平均距离、吞吐率和以时钟周期为单位的通信时延,为并行机系统的研究和设计提供了直观、有效的工具。     

程控交换机计费信息管理系统的设计与实现

本文介绍了一套自行开发的程控交换机计费信息管理系统的设计技巧、实现方法及系统功能。     

电力调度交换机软件系统的设计与实现

电力调度交换机正被逐渐地应用于电力生产调度,它在电力通信中具有举足轻重的作用。本文首先介绍了一种新型程控调度交换机软件的基本结构和设计思想,讨论了在实现此软件系统中涉及到的操作系统设计、呼叫处理程序和其他关键问题。     

高性能互连网络中的MSFS集成调度算法

提出最大服务优先（MSFS）的组播调度算法,从减小组播报文在单个路由器上传输延迟的角度出发,根据接收到报文副本的目标端口数和报文在缓存队列头位置的等待时间确定组播报文的优先级。MSFS实现简单,当单播和组播并存时,能够与FCFS单播调度算法进行“无缝”集成。模拟结果表明,MSFS能够取得高效、稳定的通信性能。     

超立方体互连网络中的组播算法研究

在高性能计算中,涉及全局数据迁移、进程控制等操作的通信被称为聚合通信。高效的聚合通信服务不仅能够简化编程,而且能够提高系统效率和整体性能。组播作为聚合通信的通用模式之一,长期以来都是人们的研究重点,包括硬件加速、软件优化、针对不同拓扑结构的研究等。本文研究了超立方体网络中的组播算法,并分析了进一步的研究方向。     

基于UDP交换路由的NAT互联技术研究

在对NAT互联技术的深入研究基础上,提出了一种基于UDP交换路由器的NAT互联技术,对其中的信息格式和工作流程进行了深入研究,并通过使用SIP协议的例子对其进行了详细论述和分析.新方案克服了TURN存在的TURN服务器瓶颈问题,能够提高穿越的效率以及改进实际部署的可行性.同时,本方案采用了RID,SID和DID来确定对等会话端的位置,这是身份标识和路由标识分离的一种体现,能很好地解决向下一代网络过渡过程中NAT设备的有效性问题.     

On Interaction between Interconnection Network Design and Latency Hiding Techniques in Multiprocessors

Latency hiding techniques are increasingly used to minimize the effect of a long memory latency in multiprocessors. Their use requires additional network bandwidth. The network organization and its design parameters alone can significantly affect performance. With latency hiding, system performance depends on how well the interconnection network can support the use of such techniques and their interaction with network organization. This paper investigates these issues for prefetching and weak consistency in a 128-processor shared-memory system with either a 2-D torus, a multistage, or a single-stage network. The performance impact of network organization and the link bandwidth, with and without the use of latency hiding techniques is shown. The effect of caching and of limiting the number of outstanding memory requests is shown. Multistage is the most robust network and has the best performance under all conditions. Single-stage network is very close in performance when sufficient channel bandwidth is available. Torus network comes in last when channel bandwidth is high, but can exceed single stage performance when it is low. The relative performance of the three networks with prefetching remains similar, with torus gaining the most. Benchmark execution time can decrease by as much as 25% with prefetching. Further gains depend on reducing the effect of write traffic. Finally, the existence of an optimal number of outstanding requests is shown but the value is program-dependent.     

The Hyperstar Interconnection Network

In this paper, a multiprocessor interconnection topology, the hyperstar, based on the Cartesian product of star graphs is studied. The basic properties of the hyperstar are discussed and proved. This includes reduced degree and diameter, hierarchical structure, vertex symmetry, optimal routing, and shortest path characterization. The hyperstar is shown to be a member of the Cayley class of symmetric graphs. Embeddings of hypercubes, star graphs, and meshes are discussed. An optimal one-to-all broadcasting algorithm is obtained and analyzed. Some results on fault tolerance, parallel paths, Hamiltonian cycles, and VLSI layouts are obtained. Furthermore, a comparative study between the hyperstar and seven related networks is conducted. The comparison is based on scalability, broadcasting cost, link requirements, cost/performance ratio, and other static parameters such as degree, diameter, and average diameter.     

长距离宽带网络互联通道的设计与实现

介绍了一种简单实用的长距离网络互联方案,着重讨沦了其管理和运行模式、设备选择、路由策略和带宽分配等问题。     

高性能路由器中交换机构的设计与实现

宽带 IP路由器是骨干网互连的重要设备 ,其交换机构决定了路由器的吞吐量和处理速度 .本文论述了交换容量为 6 4 G× 6 4 G的核心路由器中交换机构的设计与实现 ,介绍了交换板 ,高速串型背板的设计以及 IP包调度和排队原则 ,最后给出了核心路由器的实际测试结果 .另外 ,该交换结构还具有良好的可扩展性     

Designing A Disjoint Paths Interconnection Network with Fault Tolerance and Collision Solving

In fault-tolerant interconnection designs, many prior researches suggest good use of disjoint paths to improve the reliability of interconnection networks. Although disjoint paths increase reliability, they always cost the throughput penalty. To address the problems of both performance and fault-tolerant capability, the following issues should be carefully considered: (1) guarantee of at least two disjoint paths, (2) easy rerouting between disjoint paths, (3) keep low rerouting hops, (4) solve the occurrences of packets’ collision. In this paper, we consider these issues to design a fault-tolerant network called CSMIN (Combining Switches Multistage Interconnection Network). CSMIN provides two disjoint paths to guarantee one fault-tolerant and can dynamically reroute packets between these two paths to solve the collision situation. In other words, to switch packets between these two disjoint paths easily, CSMIN causes these two disjoint paths to have regular distances at each stage. Accordingly, a packet can be dynamically sent to the other disjoint path if it encounters a faulty or busy element. In addition, CSMIN presents low rerouting hops (an average of one rerouting hop) to maintain a low collision ratio. From the simulation result, CSMIN performs with a better arrival ratio than Gamma and other related disjoint paths networks do.This research was supported by the National Science Council NSC-91-2218-E-324-006.     

计算机网络互连的低成本高可用设计

本文主要研究了如何构成低成本高可用的计算机网络的原理和技术 ,包括低成本高可用网络的设计目标和网络通信链路、主机、服务器和网络设备 (如集线器、交换机、路由器 ,还包括程控交换机 )的低成本高可用结构的设计     

网络互联设备的性能测试:原理和实践

介绍了网络互连设备性能测试领域的一些技术背景 ,包括在测试中使用的性能指标和测试中的环境设置 ,这些是对网络互连设备性能测试系统的需求 .介绍了一个网络互连设备性能测试系统的设计方案 .使用这个测试系统对Cisco1 2 0 0 0路由器进行了测试