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阐述目前国内常见的建设城域网的技术并深入分析比较几种技术的优势和劣势 ,并就CWDM技术的发展和应用方案实例作了简要描述 相似文献
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采用了TSMC0.35μm CMOS工艺实现了可用于SONET/SDH2.5Gb/s和3.125Gb/s速率级光纤通信系统的限幅放大器。通过在芯片测试其最小输入动态范围可达8mVp—p,单端输出摆幅为400mVp-p,功耗250mW,含信号丢失检测功能,可以满足商用化光纤通信系统的使用标准。 相似文献
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同步数字体系骨干网的高集成度接入方法研究 总被引:1,自引:0,他引:1
针对解决同步数字体系(SDH)骨干网传输系统中通信节点的规模问题,提出了一种高集成度接入SDH骨干网的方法,该方法基于“单FPGA+多个光电转换模块”结构,在单片FPGA上可以实现多达20个通道STM-16速率等级信号的无缝接入,与已有方法相比,具有集成度高、低功耗、可靠性好和功能灵活配置等优点,该方法已成功应用在某型主干网通信系统中,应用结果表明,该方法可以实现完全符合SONET/SDH标准的并-串-光的发送和光-串-并的接收功能,大大降低了通信节点的规模,具有重要的实际意义和应用价值. 相似文献
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首先对链路管理协议中链路连通性验证功能进行了系统地分析,详细描述了其实现过程,然后对比性地讨论了链路连通性验证在SDH/SONET和DWDM网络中的修正和扩展. 相似文献
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In order to take advantage of the low entry cost of the future public ATM (asynchronous transfer mode) network with shared facilities, it is highly desirable to interconnect different hosts and local area networks (LANs) to the ATM network. The interface between the computer hosts or LANs and the ATM network, commonly called a broadband terminal adaptor (BTA), provides the necessary format conversion for the data packets and the ATM cells. It is conceivable that multiple packets from different virtual channels are interleaved as they arrive at the receive-end BTA. The BTA must have a sufficiently large buffer, called a virtual channel queue (VCQ), to temporarily store the partially received packets. Once a complete packet has been received, it is forwarded to the host or LAN. Whenever the buffer fills with all incomplete packets, a packet must be discarded to make room for others. In this paper, we first study, through computer simulations, the buffer size requirement of a shared-memory VCQ for different numbers of virtual channels at various packet loss probabilities. We then present two different implementation architectures for the shared-memory VCQ, and compare their hardware complexity. The second architecture with linked-queue approach, adopted in our work, requires less buffer and has better scalability to accommodate a large number of virtual channels. Various possible error conditions, such as cell losses in the ATM network and the VCQ buffer overflow, are considered. Corresponding solutions are proposed and included in the VCQ designs. 相似文献
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Current technological possibilities for implementing multi-service networks include both single technology ATM or IP networks and multi-technology networks such as SONET-based or flat networks. However, regardless of the technology employed, the synthesis problem – to optimally route traffic and divide the network's transmission resources between its virtual links – remains of prime importance.In this paper, we review, compare, and classify the extensive recent literature concerning multi-service network synthesis methods. In order to do this, we propose a typology based on switching and control strategies and a general notation that reflects the layered nature of the network. Technology independent mathematical models describe the various, essentially different, approaches presently found in the literature. 相似文献
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提出了一种基于DCC+OSPF协议的光网络组网技术方案,分析了该方案的关键技术并给出了实现方法,最后对该组网技术进行了验证,试验结果表明该技术方案是正确可行的。 相似文献