智能光网络的多域生存性技术研究

自动交换光网络是传送网的发展趋势,而快速高效的生存性是其重要特点.介绍了光网络生存性,重点分析了多域网络和域间路由问题,并且提出了具体的实现多域网络的生存性方法.     

基于控制器集群的SDON多域互联互通技术北大核心

针对软件定义光网络(SDON)多控制域互联互通的需求,在对多控制域信息交互协同控制进行分析研究的基础上,利用负载均衡的思想,提出了一种基于控制器集群的SDON多控制域互联互通架构,包含集群间和集群内两个互联层次。利用集群间控制器迁移和集群内主从控制器切换机制,实现光网络中多控制域间的协同互联和负载均衡,提升网络服务质量。     

ASON跨域保护研究

根据目前技术状况进行ASON跨域保护研究,提出了一种"SNCP ASON动态恢复"的保护机制,实现ASON跨域的端到端的永久1 1通道保护.     

基于D-S证据和博弈理论的多域光网络信任模型

由于多域光网络中存在主动和被动攻击问题,因 此节点间的相互信任变得十分困难。为解决此问题,本文根据分层PCE框架下多域光网络的 特点,采用D-S证据理论合成节点信任 度和域信任度,用博弈分析方法产生理智评价策略,以证据产生、证据分发和信任管理为核 心,提出了一种新的具有域内信任和域间信任机制的多域光网络信任模型,并以路径信任度 计算为例描述了信任模型的具体应用。该模型在提升多域光网络安全性的同时,尤其是在不 安全网络环境下具有较低的时间复杂度和空间复杂度。拥塞率的提升是个很困难的课题,哪 怕只是个位数的提升,实验结果表明该信任模型是有效的,并且与简单的网络信任模型相比 ,仿真结果相比网格信任模型,新的信任模型在安全环境下提升了1%,在不安全环境下提升 了5%,表现了很好的拥塞率。     

电信网络互联互通问题分析

分析了电信网络互联互通所涉及的范围及其存在的问题，探讨了解决电信网络互联互通现存问题的途径和办法。     

国内首次多厂家ASON网络互联互通获得成功

2004年12月14日,广东电信在深圳组织的多厂家ASON网络互联互通试验获得成功．参加本次试验的厂家有Siemens／Sycamore,阿尔卡特,Navtel,这是目前国内首次组织的多厂家ASON网络互通试验。     

城域光网络互联互通探讨

1城域传送网发展概述基于SDH的MSTP(多业务传送平台)很好地解决了TDM(timedivisionmultiplexing)业务和数据业务混合传输问题,已广泛应用于各运营商城域传送网建设中。第一代MSTP设备解决了数据业务在MSTP中“传起来”的问题,通过将IP/ATM业务捆绑成N×2Mbit/s或直接映射进VC-4,独占VC-4通道,实现点对点透传。第二代MSTP设备增强了原有SDH系统的交叉连接能力,提高了系统组网能力,支持了在TDM、IP、ATM之间的带宽灵活指配;实现了以太网的二层交换,支持以太网业务的带宽共享、业务汇聚及以太网共享环等功能,大大提高了端口…     

下一代网络的互联互通监测系统

本文主要研究下一代网络的互联互通监测系统，首先叙述网间互联互通监测系统以及目前网间互联互通监测系统的总体结构，然后提出NGN的互联互通监测系统结构，并对该NGN的互联互通监测系统结构进行详细分析。     

华为智能光网络通过OIF全球互联互通测试

华为技术有限公司（“华为”）日前宣布，其智能光网络在由光互联论坛OIF（Optical Internetworking Forum）组织的全球范围智能光网络互联互通测试中与中国电信、法国电信、意大利电信等圆满完成合作，成为唯一完成所有规定测试项目的设备供应商。本次OIF测试成果在ECOC（European Conference and Exhibition on Optical Communication Conference）通信展会上进行了展示。     

多域光网络中考虑域间输出策略的分段共享保护算法

研究了多域光网络中的路由保护问题.在多域光网络中,域间路由的建立要遵从域间输出策略.在考虑域间输出策略的基础上提出了一种多域光网络中基于路径计算单元的分段共享保护算法.仿真表明,相比传统的基于路径计算单元的多域分段保护算法,该算法阻塞率低,平均保护切换时间短.     

Research of novel complex optical network routing architecture

This article puts forward a novel routing architecture for complex optical network,which core component is path calculation element(PCE).As is well known,the PCE-based distributed path computation structure is making the routing control and computation loosely coupled from traditional control plane.In the study,the resource allocation and routing algorithm are the critical part of PCE hierarchy.To compare the performance of new architecture and the traditional one,the user uses the flooding suppression,routing delay,resource utilization and traffic blocking probability as performance simulation parameters and taking the verification simulation on objective modular network testbed(OMNeT)platform against to source-node routing architecture.The numerical analysis,computer simulation and experiment work indicate that the operation of PCE-based routing architecture can reduce the flooding information of path calculation request as well as the routing hops significantly and improve the quality of service(QoS)by decreasing the blocking probability when failure happened.     

面向片上光互连的无源H树网络设计

传统的片上电互连已无法满足多核处理系统日益 增长的通信需求,在延迟、能耗和 带宽方面更具优势的片上光互连逐渐引起关注。为了降低片上光网络(optical network-on-chip,ONoC)硬件开销和提升光网络 性能,本文提出一种基于微环谐振器的16端口无源H树光互连网络。利用宽带微环谐振器设 计4组转向光路由器,降低微环谐振器使用并完成端口选择,将信号传输到8端口接收光路由 器以及3级和4级光开关来满足信号的无争用传输。实验结果表明,在16×16阵列规模下与 Crossbar、λ-Router、GWOR、LACE、Light等无源网络结 构相比,无源光H树网络仅需使用 72个微环谐振器。网络平均插入损耗1.49 dB,与λ-Router、GWOR 、TAONoC相比分别降低 了21.5%、10.7%、59.7 %,各路径平均信噪比 为17.48 dB,与λ-Router、GWOR、Light相比分别提高了38.5%、36.0%、17.1%。     

New nodal design for high throughput data vortex optical interconnection network

This paper proposes a new three input nodal structure within the data vortex packet switched interconnection network. With additional optical switches, the modified architecture allows for two input packets in addition to a buffered packet to be processed simultaneously within a routing node. A much higher degree of parallel processing is allowed in comparison to previously proposed enhanced buffer node with two input processing or the original network node with single input processing. Unlike the previous contention prevention mechanism, the new network operates by introducing the packet blocking within the node if no exit path is available. This eliminates the traffic control signaling and the strict timing alignment associated with the routing paths which simplifies the overall network implementation. This study shows that both data throughput and the latency performance are improved significantly within the new network. The study compares the three input node with the two input node as well as the original single input data vortex node. Due to additional switch count and nodal cost, networks that support the same I/O ports and of the same cost are compared for a fair comparison. The limitation introduced by the blocking rate is also addressed. The study has shown that under reasonable traffic and network condition, the blocking rate can be kept very low without introducing complex controls and management for dropped packets. As previous architectures require operation under saturation point, the proposed architecture should also operate at reasonable level of network redundancy to avoid excessive packet drop. This study provides guidance and criteria on the proposed three input network design and operation for feasible applications. The proposed network provides an attractive alternative to the previous architectures for higher throughput and lower latency performance.     

智能光网络多层生存性技术

分析了现有网络中独立的和层间协调的生存性机制,并且对基于GMPLS的智能光网络的多层生存性进行分析,可以看到智能光网络为多层网络生存性提供了更好的保证.     

基于FPGA的光互连网络技术研究与性能分析

研究了基于Xilinx Virtex-5 FPGA的光互连网络技术,通过FPGA板内的高速串行收发器连接SFP光收发模块,实现高速串行数据收发,每通道的传输速率达到3.125Gb/s,提出并实现了基于FPGA的四节点单向环形光互连网络.在ISE设计环境下,设计了基于两块FPGA板的FFT运算应用和基于四块FPGA板的具有随机消息分布特性的网络应用,完成了光互连网络的性能测试分析.     

VCSEL技术与并行光互联

介绍了VCSEL结构和技术特点，它以很高的性能价值比成功地应用于单通道和并行光互联，并将在宽带以太网、高速数据通信网中得到广泛的应用，以VCSEL为基础器件的高速大容量、高并行处理功能的光互连、光交换系统有着极好的应用前景。     

一种宽带光总线互连网络机群系统设计

介绍了一种宽带光总线互连网络机群系统。该系统利用宽带多层自由空间光学数据总线和VCSEL/MSMCMOS光电子集成器件实现4台计算机之间互连。专用通讯适配器实现高性能并行接口(high performance parallel interface,HIPPI)到外设部件互连(peripheral component interconnection,PCI)协议转换。该系统光互连网络传输容量可达60Gbit/s,可用于计算机之间的高速通讯。     

Study of key technology for reconfigurable satellite platform supporting network interconnection

Reconfigurable satellite platform is a new spacecraft design concept.The application of distributed computing in reconfigurable integrated satellite platform was studied,the standard mechanical interface,electrical interface for the separation or separation between main platform and a variety of payloads to form a new combination and achieve the expansion of platform functions and efficient use was proposed.Including the security control protocol,scalable design,distributed computing and management models and other aspects of a detailed design,the key technologies of reconfigurable integrated satellite platforms supporting network interconnection were studied to meet the existing communications,remote sensing and navigation satellites’ needs.It will be promoted for the spacecraft design to the integrated business and in the orbit reconfiguration direction of continuous development,which will enhance the stability of the orbit operation,survivability and maintainability and provide a reliable technical foundation for the world of integrated network research.     

嵌入式多层多域光网络路由及控制器设计(本期优秀论文)

提出一种光网络路径计算及连接控制专用系统的设计和实现方法.搭建基于该设计的实验平台实现了在多SDH及OTN域光网络之上的跨域连接调度、生存性策略等多层多域光网络互连互通功能,并满足实时性、可靠性、低成本等要求.