最新刊期
      卷 ， 期 6 ， 2003
      • MAO Dongfeng1,WEN Jing2
        Issue 6, Pages: 1-4(2003) DOI: 10.13756/j.gtxyj.2003.06.001
        摘要：This paper examines in detail the scheme to handle calls and connections that are separated, and describes the method to assign labels from upstream and downstream with the new LABEL TLV and LABEL-SET TLV. Finally, this paper gives the operation to query calls and connections, and provides an approach of applying policy controlling technology to manage the call and connection status query.  
        关键词：GMPLS;CR-LDP;ASON;signaling   
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      • Issue 6, Pages: 4(2003)
          
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      • SHEN Yulun,HE Yan,YANGliu
        Issue 6, Pages: 5-8(2003) DOI: 10.13756/j.gtxyj.2003.06.002
        摘要：EPON is a new kind of broadband access solution,MPCP is the core protocol to solve EPON critical technology .In the article,we Intruduced the content and the survey of MPCP, then gave the frame format of MPCPDU and descibed the mechanism to implement MPCP,at last summarized the latest development on the research of MPCP.  
        关键词：EPON;MPCP;broadhand access   
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      • Issue 6, Pages: 8(2003)
          
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      • CHEN Xue1,YANG Guoquan1,WANG Dingding1,DENG Yu2
        Issue 6, Pages: 9-12(2003) DOI: 10.13756/j.gtxyj.2003.06.003
        摘要：MSEPONs aim to provide customers with multiservice broad access of telecom carriers’ QoS, which can support Ethernet and TDM traffic （E1）. As a carrierclass system, it is very important and necessary to monitor the error of the system. In this paper,a novel scheme of online error monitoring is proposed, which utilizes the bit interleaved parity （BIP） technique, with a byte in the preamble of Ethernet frame. Furthermore the performance of the scheme is analyzed and the feasibility of the scheme is proved.  
        关键词：MS-EPON;Bit interleaved parity N （BIP-N）;checking probability of error block;checking probability of bit error   
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      • Issue 6, Pages: 12(2003)
          
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      • ZUO Xiaobo1,CHEN Xue1,DENG Yu2,LIU Dong2
        Issue 6, Pages: 13-16(2003) DOI: 10.13756/j.gtxyj.2003.06.004
        摘要：ONU autodiscovery is the precondition for the normal operation of an EPON system. When an EPON system is running, ONU autodiscovery makes it work that a new ONU or malfunction ONU can be registered without any disturbing to the normal ONUs in the system. This results in good scalability and convenient operation & maintenance of PON systems. In this paper, we analyze the basic requirements of ONU autodiscovery, describe the whole process of autodiscovery in details, and compare different schemes for register collision avoidance.  
        关键词：EPON;ONU;OLT;LLID;auto discovery   
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      • BAI Shuangbao1,HU Chunlin2,TAN Xinquan1
        Issue 6, Pages: 17-20(2003) DOI: 10.13756/j.gtxyj.2003.06.005
        摘要：With the opening of telecommunication market and the development of telecommunication carriers in China Telecom, the traditional support system must have been replaced by new one. This paper analyzed the main questions of the traditional system, introduced the background of new BOSS system development, studied the system frame and the functions of four subsystems in BOSS system.  
        关键词：BOSS;business;service;interface   
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      • Issue 6, Pages: 20(2003)
          
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      • TAO Zhiyong
        Issue 6, Pages: 26-28(2003) DOI: 10.13756/j.gtxyj.2003.06.007
        摘要：IEEE Std 802.3ae for 10 Gbit/s Ethernet （10 GbE） has been formally approved by IEEE on July 22,2002.This paper gave a brief introduction to the hierarchy of the standard for 10 GbE,with focus on the physical layer of 10 GbE.At the end of this paper we gave the future applications of 10 GbE.  
        关键词：10 GbE;Standard 802.3ae;LAN;WAN   
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      • GU Yan1,HU Chunlin2
        Issue 6, Pages: 29-31(2003) DOI: 10.13756/j.gtxyj.2003.06.008
        摘要：Nowadays telecom operators are facing drastic competition. Videoconferencing system ,based on H.323 , provides the public with a new valueadded service in broadband IP network making profits for its operators. This paper discussed some technical problems related to the system such as QoS,services through NAT and Router, security,etc.  
        关键词：videoconferencing system;QoS;security   
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      • LUO Juan1,LU Hua2,CAO Yang1,YIN Jianhua1
        Issue 6, Pages: 32-35(2003) DOI: 10.13756/j.gtxyj.2003.06.009
        摘要：This paper introduced broadband fiber access network system and some main access methods in particular compared the merits and demerits of these access technologies in application, then presented our suggestion and expectation.  
        关键词：access network;AON;PON   
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      • AN Hong
        Issue 6, Pages: 36-38(2003) DOI: 10.13756/j.gtxyj.2003.06.010
        摘要：In No.7 signaling network a signaling point which can only provides 16 signaling links at most since the link capacity of signaling point is restricted by 4 bits SLS code. A scheme which is designed to increase the link capacity without changing present standards is presented. The capacity of signaling link is doubled by using this scheme so it is significant to solve the insufficient link capacity problem.  
        关键词：signaling network;No.7 signaling;signaling link   
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      • Issue 6, Pages: 39-42(2003) DOI: 10.13756/j.gtxyj.2003.06.011
        摘要：Local balance between the dispersion and the selfphase modulation and the pulsewidth can be conserved when picosecond solitons propagate along a dispersiondecreasing fiber which group dispersion exponentially decreases along the fiber length at the same rate as the energy loss. However, fabricating the dispersiondecreasing fiber with perfect group dispersion distribution is not easy. A scheme of stepdispersiondecreasing fiber substituting for the dispersiondecreasing fiber has been investigated by solving numerically the generalized nonlinear Schrodinger equation in this paper. The results of the numerical simulation shows that solitons can stably propagate in the loop composed of the stepdispersiondecreasing fibers and the sliding filters.  
        关键词：step-decreasing-dispersion fiber;sub-picosecond soliton;optical communication   
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      • WU Qiang,YU Chongxiu,YAO Deqi,XIN Yu,XIN Xiangjun,HU Lehui
        Issue 6, Pages: 43-45(2003) DOI: 10.13756/j.gtxyj.2003.06.012
        摘要：We designed a 10 Gbit/s simulation system whose chromatic dispersion was compensated by chirped fiber Bragg gratings. We researched the influences of five compensation methods on system bit error rate （BER） and selected the best one. We investigated the influence of input fiber optical power on system BER and the conclusion was that the system BER increased with the increase of input power. For the best compensation method, the system had both high transmitting power and low BER when the input was 6 dBm.  
        关键词：chirped fiber Bragg gratings;chromatic dispersion compensation;nonlinear effect;EDFA   
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      • YI Yongqing,NING Ding,JING Guangming,LIANG Xiaohong
        Issue 6, Pages: 46-49(2003) DOI: 10.13756/j.gtxyj.2003.06.013
        摘要：The article gave an introduction to the optimun design, principle and fabrication technology of the Yb3+doped doubleclad fiber which is made by MCVD and solution doping technique. This Yb3+doped donbleclad fiber has high doping concentration （the absorption loss is 2～10 dB/m at 976 nm） and low intrinsic loss （10 dB/km at 1.3μm）.  
        关键词：Yb3+doping;double-clad fiber;solution doping   
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      • XIE Xiaohong
        Issue 6, Pages: 50-53(2003) DOI: 10.13756/j.gtxyj.2003.06.014
        摘要：In this paper,we introduce the influnce of fiber’s outer stress on PMD,we also analyse the relationship between the out stress and PMD using experiment data.  
        关键词：PMD;stress;takeup tension   
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      • CHEN Wei,LI Shiyu,CHENG Yu,LU Dafang
        Issue 6, Pages: 54-57(2003) DOI: 10.13756/j.gtxyj.2003.06.015
        摘要：In this article, the fundamental principles of polarization maintaining optical fiber（PMF） and its manufacturing technologies are formulated. What’s more, the progress on the technologies of PMF at home and abroad and its developing trends are analyzed.  
        关键词：polarization maintaining optical fiber（PMF）;birefringence;optical fiber sensor;fiber optical gyroscope（FOG）   
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      • LI Wei,LIU De ming,HUANG De xiu
        Issue 6, Pages: 58-61(2003) DOI: 10.13756/j.gtxyj.2003.06.016
        摘要：The progress of enable components technologies made DWDM systems widely deployed and the capacity soaring up. In this paper, several key component technologies and future trends are reviewed, especially in fabrication technique, performance comparison and the importance for future optical networks.  
        关键词：DWDM;arrayed waveguide grating;dynamic gain equalizer;dispersion compensation   
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      • PAN Weiqing,HE Duiyan,LI Zhihong,DONG Qin
        Issue 6, Pages: 62-65(2003) DOI: 10.13756/j.gtxyj.2003.06.017
        摘要：In order to minish the powerloss without increasing the dimension of grade waveguide and band waveguide, four shape functions of transitional waveguide are proposed and analysed by the finitedifference beam propagation method. Based on it, conditional relations between optimized transitional waveguide shape and the angle of transitional waveguide are found out and proposed in math formula.  
        关键词：optical waveguide;FD-BPM;integrated optics   
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      • Issue 6, Pages: 66-70(2003)
          
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