最新刊期
      卷 ， 期 5 ， 2005
      • ZHAO Zi-sen
        Issue 5, Pages: 1-8(2005) DOI: 10.13756/j.gtxyj.2005.05.001
        摘要：This paper is a brief introduction to the technologies of 2005 OFC-NFOEC （Optical Fiber Communication Conference & National Fiber Optics Engineers Conference） and others, including system and devices field. Such contents are considered as promising and characteristic or interesting by author. In the system field, we give emphasis to the FTTH, ASON and IP optical network. In the device field, we give emphasis to the optical switch, wavelength adjustable devices and PLC. This paper is for Chinese engineer reader, all the introductions are rough, those who wish to get detailed information may read the references which are denoted in the end of paragraph.  
        关键词：optical fiber;communication;technology   
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      • Issue 5, Pages: 8(2005)
          
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      • XU Jun-bo,CAO Yun,YANG Ning,YE Bo,CHEN De-hua,HE Jian-ming
        Issue 5, Pages: 9-12(2005) DOI: 10.13756/j.gtxyj.2005.05.002
        摘要：This paper introduced the 80×40 Gbit/s dense wavelength dvision multiplexing（DWDM） system developed by FiberHome. It is first system in China and FiberHome holds all intelligence property of it. The system employs distributed Raman amplification,superFEC and tributary transparent multiplex （TTM） technologies. The transmission experiment of 80×40 Gbit/s DWDM system using NRZ code over 800 km G.652 fiber line was carried out .The test results show that the optical path penalty is less than 2 dB and the system runs error free for continuous 60 hours after 800 km transmission.  
        关键词：DWDM;40 Gbit/s;Raman amplifier;forward error correction;tributary transparent multiplex   
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      • CHEN Ying-mei,WANG Zhi-gong,ZHANG Li,XIONG Ming-zhen
        Issue 5, Pages: 13-15(2005) DOI: 10.13756/j.gtxyj.2005.05.003
        摘要：This article presented the design of a monolithic optical receiver circuit for SDH STM-16 （2.5 Gbit/s） fiber-optic communications. The IC was implemented in TSMC 0.25 μm CMOS process. The 1.25 GHz clock can be recovered in response to 5 μA 2.5 Gbit/s PRBS input data (231-1), and the 2.5 Gbit/s PRBS data can be demultiplexed to four 625 Mbit/s data. The output clock and data are the 400 mV standard PCML voltage level. The 1.04 mm×0.97 mm IC consumes 850 mW under a single 3.3 V power supply.  
        关键词：optical transmission systems;clock recovery circuit;data decision;1∶4 demultiplex;charge pump phase-locked loop   
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      • ZHANG Liang~1,LIU Jun~2
        Issue 5, Pages: 16-19(2005) DOI: 10.13756/j.gtxyj.2005.05.004
        摘要：This paper analyzed the effect of deflection routing on network performance and the sending end controlled deflection routing technology, propesed an improved scheme based on threshold checking and data updating. In this scheme, the edge nodes can quickly update the status informations of network, and transfer the informations such as the link blocking distribution through special control packets. The switching nodes can perform threshold checking, determine the burst transmission mode in the case of competition, so as to reduce the influence of deflection routing on network load, decrease the network blocking probability, and improve the network performance.  
        关键词：optical burst switching;deflection routing;blocking probability;performance   
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      • AO Fa-liang,YU Sheng-yun
        Issue 5, Pages: 20-22(2005) DOI: 10.13756/j.gtxyj.2005.05.005
        摘要：This article presented an introduction to the main content of extension and mechanism of signaling protocol for ASON-RSVP-TE, then outlined the working process of RSVP-TE, described the meaning and the realization of RSVP-TE simulation, lastly, simulated some network properties of RSVP-TE and gave some useful results of simulation.  
        关键词：RSVP;GMPLS;TE;LSP   
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      • XU Hua-dong,FAN Ge
        Issue 5, Pages: 23-27(2005) DOI: 10.13756/j.gtxyj.2005.05.006
        摘要：This paper introduced several kinds of protection or restoration mechanism that can be used in the MSTP, including SDH APS, protection in VC, 2-level restoration in Ethernet, auto-protection in RPR, protection and restoration for MPLS, and analyzed the advantages and shortages of these techniques.  
        关键词：MSTP;VC;LCAS;RPR;MPLS;protect;restoration   
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      • XIANG Li-bin~1,GUO Cheng-cheng~1,LI Xu-tao~2
        Issue 5, Pages: 28-31(2005) DOI: 10.13756/j.gtxyj.2005.05.007
        摘要：An important objective of RPR technology is to simultaneously achieve high utilization, spatial reuse, and fairness. This paper expounded the concept of fairness. discussed different models for analysis of fairness, studied the algorithm of SRP （Spatial Reuse Protocol） and DVSR （Distributed Virtual Time Scheduling）, pointed out the superiorities of DVSR in the RPR. Lastly, the paper presented the basic requirements and the criterion of evaluation for RPR fairness strategy.  
        关键词：metro area network（MAN）;RPR;fairness algorithms;SRP;DVSR   
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      • MU Hui-xian,SHOU Guo-chu,HU Yi-hong
        Issue 5, Pages: 32-34(2005) DOI: 10.13756/j.gtxyj.2005.05.008
        摘要：Because of the technology mature and the extensive application of Ethernet, EPON （ Ethernet over PON） represents the latest development trend of the access network technologies. The article summarizes the OAM（Operations, Administration and Maintenance） sublayer of EPON system, including the OAM protocol, OAMPDU and the OAM block diagram. The article also analyses the OAM application in the network management.  
        关键词：EPON;OAM;link monitoring;remote loopback;OAMPDU   
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      • HUANG Li-yan~1,HE Yan~2
        Issue 5, Pages: 35-37(2005) DOI: 10.13756/j.gtxyj.2005.05.009
        摘要：This paper discrrpted the essential difference between optical Ethernet and EPON. At the same time, the paper analyzed the burst-mode signal processing done by EPON system, with the emphasis on the analysis of the principle and expermentation of the burst-mode receiver. The paper also gave a solution scheme, and described how does the top level chip process the burst-mode signal.  
        关键词：burst-mode receiver;burst-mode signal processing;EPON   
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      • ZHU Liang-zheng
        Issue 5, Pages: 38-40(2005) DOI: 10.13756/j.gtxyj.2005.05.010
        摘要：In this paper,we analyzed the technology modes which are used for the carriers to construct NGN bearer network of access layer, proposed the methods of using GPON technology to construct the bearer network of access layer, and proved the feasibility of the construct mode through the technology analysis and the bandwidth demand analysis. Finally, we made a comparison between these modes, and analyzed the advantages of this application.  
        关键词：NGN;GPON;bearer network of access layer;construct mode   
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      • LIU Li,WEI Zhi,ZHOU Zhen
        Issue 5, Pages: 41-43(2005) DOI: 10.13756/j.gtxyj.2005.05.011
        摘要：On the basis of analysis of current research of network quality of service （QoS） architecture, this paper proposed a IP DSLAM-based QoS architecture frame work and a forwarding-policy solution scheme which can realize the priority level forwarding, and gave a detail description of the application principle of two important forwading-polices.  
        关键词：quality of service （QoS）;priority level;DiffServ;forwarding-policy;per-hop-behavior （PHB）   
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      • ZHOU Xu-yang
        Issue 5, Pages: 44-46(2005) DOI: 10.13756/j.gtxyj.2005.05.012
        摘要：This paper first introduces the reference model of multi-service switch proposed by many international organizations, and then states reference models of partitioning, one of the principal issues based on these models. Finally, the paper gives an algorithm and method to implement the most complex partitioning method, dynamic partitioning.  
        关键词：multi-service switch;switch element;dynamic partitioning   
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      • ZHANG Hong-wei,HE Yan
        Issue 5, Pages: 47-49(2005) DOI: 10.13756/j.gtxyj.2005.05.013
        摘要：This paper introduced the basic concept of two models in VPN QoS （virtual private network quality of service） , and through comparison between the hose model and the pipe model, obtained the advantages of the hose model and the means of its realization. Lastly, the paper presented the basic theory and algorithms for the solution to the optimal spanning tree in hose model.  
        关键词：QoS;hose model;pipe model;ICR;ECR;VPN   
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      • LIU Ying-mei~
        Issue 5, Pages: 50-53(2005) DOI: 10.13756/j.gtxyj.2005.05.014
        摘要：In an effort to resolve the existing problems in current ADSL （Asymmetrical Digital Subscriber Line） access network in terms of bandwidth allocation efficiency and QoS （Quality of Service）guarantee, we propose a new bandwidth allocation scheme, in which the Lagrangian optimization approach is applied. In this scheme, based on the online measuring data, the bandwidth assigned to different classes of traffics is adjusted under certain linear pricing strategy so that the network provider could realize the revenue maximization objective with resource constraints and the various QoS requirements of the customers could be met simultaneously.  
        关键词：ADSL access network;bandwidth allocation;multi-class traffics;revenue maximization   
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      • LIANG Hong-un,HE Yan
        Issue 5, Pages: 54-56(2005) DOI: 10.13756/j.gtxyj.2005.05.015
        摘要：Construction of a reliable, safe and highly effective DHCP （Dynamic Host Configuration Protocol） network is a key problem in development of broadband network. This paper firstly introduced the principle of operation of DHCP, then described the implementation of DHCP, including its topology structure, redundancy design and server configuration. Lastly, the paper gave the implementation process of DHCP, and presented the problems of application in broadband network and the corresponding solution.  
        关键词：DHCP;IP;network;server   
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      • WANG Cheng-yi
        Issue 5, Pages: 57-59(2005) DOI: 10.13756/j.gtxyj.2005.05.016
        摘要：This paper outlined the conception of circuit emulation service （CES） based on metro Ethernet network （MEN）, presented a brief introduction to the main types of CES in MEN, analyzed the primary structure and operational modes of TDM line service in MEN, described the main interface types and functional elements. Lastly ,the application scheme and prospects of this service were simply analyzed.  
        关键词：MEN;CES;TDM line service（T-Line）   
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      • LIAN Yan-yun,CHEN Xin-qiao,LIN Ru-jian
        Issue 5, Pages: 60-63(2005) DOI: 10.13756/j.gtxyj.2005.05.017
        摘要：The technology of plastic optical fiber （POF） is becoming increasinly mature, the application of POF is more and more broad too. In this paper, we introduced the performance of POF, discussed the feasibilities of several kinds of POF in building cabling, summarized the general situation of building cabling standards and POF standards, and finally analyzed the limitations of the current cabling standards and the urgency of establishment of POF standards.  
        关键词：plastic optical fiber（POF）;building cabling;Gigabit Ethernet;standard   
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      • ZHANG Qiang~1,TANG Ren-jie~2
        Issue 5, Pages: 64-67(2005) DOI: 10.13756/j.gtxyj.2005.05.018
        摘要：All kinds of technologies for dispersion compensation/dispersion management have been applied in long-haul and high-rate DWDM transmission, in which, dispersion management line （DML） consisting of alternating fibers with positive and negative dispersion is considered as a feasible solution. DML develops quickly and attracts more and more attentions, but which is rarely reported in China. This paper, according to requirements of long-haul high-rate DWDM to transmission line, illuminated the characteristics and recent developments of three type of DML are illuminated.  
        关键词：DWDM;DCF;RDF;DMF;DML   
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      • CHEN Si-xiang~1,JIANG Zheng-feng~1,HU Ye-fa~1,LIU Wen~2
        Issue 5, Pages: 68-70(2005) DOI: 10.13756/j.gtxyj.2005.05.019
        摘要：This paper studied the optical properties of SiO2 layers obtained by use of plasme-enhanced chemical vapor deposition （PECVD）, expounded the effect of deposition parameters and annealing on the layer properties. Through optimization of process technology, we obtained high-quality waveguide film layer and fabricated low-loss planar optical waveguide and AWG devices whose propagation loss is less than 0.1 dB/cm at 1 550 nm （center wavelength）.  
        关键词：planar optical waveguide;silica waveguides;PECVD   
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