共查询到19条相似文献,搜索用时 109 毫秒
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千兆以太网交换芯片是千兆以太网络中的关键芯片,芯片中的直接内存访问(DMA)单元的性能是决定芯片的吞吐量的关键因素.文章介绍了一种8端口千兆以太网交换芯片中的DMA单元的实现方案,并且给出了仿真验证结果. 相似文献
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Gigabit Ethernet switches using a shared buffer architecture 总被引:1,自引:0,他引:1
Lau M.V. Shieh S. Pei-Feng Wang Smith B. Lee D. Chao J. Shung B. Cheng-Chung Shih 《Communications Magazine, IEEE》2003,41(12):76-84
Gigabit Ethernet networks have seen great demand in recent years. This growth was fueled by both an increase in port speed at the client side and new applications in MAN and WAN space. In this article, we report a highly integrated Ethernet switch IC design that supports 12 gigabit ports and one 10 Gb port. All packet memory and search memory are integrated on chip. A deeply pipelined structure with parallel memory access is employed to achieve wirespeed search performance. A flexible policy engine is designed to allow packet filtering and modification. A novel tail buffer architecture is proposed to address the variable packet length issue in the shared buffer architecture. Custom mixed-signal circuits are incorporated to implement the 10G Ethernet interface in XGMII. The chip integrates 70 million transistors in a 16 mm /spl times/ 15 mm die using 0.18 /spl mu/m CMOS technology. The chip has been tested to verify the wirespeed searching and switching performance. 相似文献
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《Electronics & Communication Engineering Journal》2000,12(4):156-166
In today's commercial environment, many organisations depend upon their local-area networks (LAN) and information technology infrastructure for growth, competitiveness and also for sharing of resources, information and applications. More and more users are being networked to provide connectivity to an increasing number of complex and mission-critical corporate applications. More than 80% of the installed network connections were Ethernet by the end of 1996, making it the most popular networking technology in use today. Fast and Gigabit Ethernet have become the leading choices for high-speed LANs. As the use of Fast Ethernet connections to the desktop increases, an even higher speed networking technology at the backbone and server level will be required. Hence, early implementation of Gigabit Ethernet technology will be in high-speed backbones, server connections and specialised workgroups. The total shipments of Gigabit Ethernet products for 1999 exceed 1.5 million ports. This paper describes the Gigabit Ethernet technology, its design and cabling requirements 相似文献
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1 10GbE技术在局域网(LAN)中的应用 10GbE技术标准支持多模和单模两类光纤,而规范的单模光纤传输距离从千兆以太网支持的5km提高到40kin。这使得LAN网络的拥有者管理LAN网络的数据中心可远离LAN局域网内校园、企业等达 相似文献
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Jayakumar A. Bustos M.S. Cheskis D. Pietrucha S.J. Bonelli M. Al-Kuran S. Scheinberg N. 《Solid-State Circuits, IEEE Journal of》2000,35(9):1271-1275
The paper describes a 3-V monolithically integrated metal-semiconductor-metal photodetector (MSM-PD) and transimpedance amplifier (TIA) chip that is fully compliant with the Gigabit Ethernet receiver specification for the short-reach application (IEEE 802.3z 1000BASE-SX). Key typical performance specifications are -22 dBm sensitivity, 1200 MHz 3-dB bandwidth, 1300-V/W differential responsivity, and 120-mW power dissipation at 3 V. The chip is fabricated in a production 0.5-μm gate length GaAs MESFET technology and is packaged in a TO-46 header with a flat window and a ball-lens cap option 相似文献
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分布式并行计算的发展对嵌入式系统互联技术提出了更高的要求,RapidIO可提供芯片间、板间的高性能互联,传输效率高于PCIE和千兆以太网。文中给出了一种基于RapidIO的双主机节点嵌入式系统互联的设计方案、硬件设计及其软件实现,并对系统功能和性能进行验证。验证结果表明,该系统性能稳定、可靠,并为新一代高性能嵌入式系统互联提供了良好的解决方案。 相似文献
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该文主要阐述在FPGA(Field—Programmable Gate Array)内千兆以太网协议数据流帧的生成、编码、组帧、解帧及协议帧分析,详细地阐述了BCM5421和FPGA组合的硬件设计技术、协议发生的FPGA设计技术、协议解码、过滤、性能分析的FPGA设计技术等关键技术的实现途径。 相似文献
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千兆以太网测试设计与实现 总被引:1,自引:1,他引:1
随着城域网数据业务的增多和功能的增强,以太网服务在网络服务市场占据了主导优势,为了适应以太网专线、SDH上的以太网、多业务传送平台及光纤通道、VoIP及NGN等各种业务测试发展的需要,有必要针对千兆网络进行标准测试.文中主要介绍了千兆以太网测试的技术指标,提出一种测试方案,并给出具体的实现方法。 相似文献