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光突发交换(Optical BurstSwitching)是一种介于光路交换OCS和光分组交换OPS之间的很有发展潜力的交换模式,它融合了两者的优势又克服了两者的缺点。本文阐述了OBS的概念、原理、网络结构、节点结构,以及目前光突发交换的研究热点。 相似文献
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本文介绍了光突发交换的网络原理、网络结构和模块功能,结合国内外的研究成果,总结和讨论了光突发交换的资源预约机制,分析了它们的网络性能。 相似文献
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OBS(光突发交换)的设计目的就是有效利用光纤提供的丰富带宽,突发冲突是光突发交换网络发展中遇到的主要问题之一.介绍一种新的突发冲突解决机制,这种方法是基于突发分段和NOLM(非线性光环路镜)的.NOLM与SOA(半导体光放大器)配合为分段的突发包提供光缓冲和超高速光交换服务.还对突发长度符合Pareto分布和负指数分布的突发源在不同的传输负荷下,采用该冲突解决机制时的突发包丢失率进行了计算仿真. 相似文献
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光突发交换(OBS)技术是下一代全光分组交换技术的典型代表.本文主要研究并分析了基于固定长度光突发数据的OBS网络平均时延、突发数据数量等性能,给出了各参量随信道负荷量变化时的变化规律. 相似文献
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The Dedicated Short-Range Communication (DSRC) is an emerging standard to push the vehicular communication into modern automotive industry. The DSRC standard generally applies FM0 and Manchester to reach DC-balance enhancing the signal reliability. However, the intrinsic unbalance computation load between FM0 and Manchester makes their VLSI architecture with poor hardware utilization. In this paper, the reuse-oriented Boolean simplification (ROBS) technique is proposed to overcome this problem. The ROBS technique constructs the balance-type architecture to improve the hardware utilization rate (HUR) from 50 % to 90 %. The analysis of how the clock-skew affects the balance-type architecture is also discussed. This work is realized by 0.18um 1P6M CMOS technology with cell-based design flow. The gate count is 25.61, which is normalized to a 2-input NAND gate. The power consumption is 6.58uW@27MHz for FM0 encoding and 6.85uW@27MHz for Manchester encoding. The encoding capability is up to 27 Mbps that can fully support the DSRC standards of America, Europe and Japan. 相似文献
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介绍了OVPN体系结构及参考模型,阐述了供应商提供OVPN所需要的关键技术和各方面要求,最后分析了智能光网络对OVPN服务的支持。 相似文献
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实现高速光因特网的技术分析 总被引:8,自引:0,他引:8
通用多协议标记交换(GMPLS)技术的出现,为实现光因特网提供了一种新的方法。文章介绍光因特网中的关键协议GMPLS和光因特网的基本形态,并对光因特网节点体系结构进行技术分析。 相似文献
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M. F. AL-Naday R. C. Almeida Jr. K. M. Guild M. J. Reed 《Photonic Network Communications》2012,24(2):132-137
This paper presents the design of a hardware accelerated forwarding architecture for processing packets that are labelled with a Bloom Filter (BF)-based header. The architecture consists of a conventional broadcast-and-select all-optical switching fabric, composed of Semiconductor Optical Amplifiers (SOAs), and a hardware-based Serial Processing Unit (SPU) that uses an on-the-fly processing mechanism to forward optical packets. The proposed SPU avoids the use of memory units and uses a small number of logic gates that facilitate a straightforward all-optical implementation using photonic logic gates. The SPU also supports flexible wavelength multicasting by allowing each incoming wavelength to be forwarded to any number of output ports. Contention resolution is provided by the introduction of an Optical Delay Line (ODL) that provides a single-packet optical buffer if the output channel is occupied. 相似文献