OCDMA-PON系统及其关键技术的研究
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摘要
随着新型多媒体业务的快速发展,整个通信网络特别是接入网面临着带宽需求持续增长带来的巨大压力,致使现有的基于TDMA带宽共享方式的无源光网络技术在带宽和安全性能方面的缺陷日益凸显,于是新的基于WDM的PON技术和基于OCMDA的PON技术先后被提出并进行了相关实验。在WDM-PON技术中,用户独享一个波长资源,但是波长资源有限,而且波长资源分配方案复杂,因此难于实现大容量用户的灵活接入。相比之下,OCDMA-PON具有出色的网络安全性和信息安全性,并且易于实现大容量用户的灵活接入,势必成为未来光接入领域的最佳选择。
在此背景下,本文研究了OCDMA-PON系统的基本原理、结构,并重点讨论了其中的若干关键技术。全文研究工作包括：
1、综述了基于无源光网络技术的进展历程,介绍了OCDMA-PON系统的技术优势和研究现状,阐述了OCDMA-PON系统的基本原理、系统结构和关键技术。
2、重点研究了OCDMA-PON中OCDMA光码字构造.编解码方案、再调制技术、加密技术以及多速率技术等关键技术,并讨论了OCDMA-PON与WDM技术的融合。通过理论和仿真综合分析,本文的OCDMA-PON系统中,构造了127位Gold作为光地址码码字,设计了时域扩频相位编解码方案来实现编解码器,并且分别提出了基于DQPSK/OOK、DQPSK/PPM的正交再调制技术和基于SOA-MZI的全光异或加密方案。
3、分别设计了基于DQPSK/OOK和DQPSK/PPM正交再调制技术的OCDMA-PON仿真系统,在相同传输条件下,在多用户干扰(Multi-User Interference,MUI)、安全性(Security)、接收灵敏度(Receiver Sensitivity,RS)等方面做了仿真模拟和对比分析。研究分析了未来OCDMA-PON技术与WDM技术融合,即实现WDM-OCDMA-PON的必要性和可行性。
With the rapid development of new multimedia services, the entire communication network, especially the access network facing the enormous pressure as the bandwidth demand continues to grow, resulting the disadvantages in terms of bandwidth and security of the existing TDMA-based bandwidth sharing passive optical network technology become more and more prominent. So the new WDM based PON and OCDMA based PON have been proposed and carried out with in related experiments. With WDM-PON technology, every user exclusive a Independent wavelength. However, the limit of the wavelength resources and the complexity of the allocation of wavelength resources make it difficult to achieve large capacity and flexible user access. In contrast, OCDMA-PON has an excellent network security, information security and easy to implement large-capacity flexible user access, so that it is considered to be the best choice optical in the futuure optical access network.
In this dissertation, the article researched the basic principle, system architecture and key technologies of the OCDMA-PON system. The paper's detailed work including:
1.Summarized the development progress of the passive optical network,introduced OCDMA-PON system's advantages and current investigation status, and described the basic principle,system architecture and key technologies of the system.
2.This dissertation focuses on the main key technologies of the OCDMA-PON such as the design of the optical OCDMA code, the encoding/decoding scheme, scheme of remodulation, the encryption technology, muti-modulation tech and so on. During the Comprehensive analysis of theory and simulation, we designed 127 Gold code as the optical address code and the time-domain spread spectrum phase encoding/decoding scheme,and also we raised the orthogonal remodulation tech based on DQPSK/OOK、DQPSK/PPM and and all-optical XOR encryption scheme based on SOA-MZI.
3.OCDMA-PON simulation systems based on DQPSK/OOK and DQPSK/PPM were designed individually. In the same transmission condition,we simulated and analyse the Multi-User Interference, security and Receiver Sensitivity. After that, we studied the integration of OCDMA-PON and WDM-PON technology in future, that is the necessity and feasibility to realize WDM-OCDMA-PON.
在此背景下,本文研究了OCDMA-PON系统的基本原理、结构,并重点讨论了其中的若干关键技术。全文研究工作包括：
1、综述了基于无源光网络技术的进展历程,介绍了OCDMA-PON系统的技术优势和研究现状,阐述了OCDMA-PON系统的基本原理、系统结构和关键技术。
2、重点研究了OCDMA-PON中OCDMA光码字构造.编解码方案、再调制技术、加密技术以及多速率技术等关键技术,并讨论了OCDMA-PON与WDM技术的融合。通过理论和仿真综合分析,本文的OCDMA-PON系统中,构造了127位Gold作为光地址码码字,设计了时域扩频相位编解码方案来实现编解码器,并且分别提出了基于DQPSK/OOK、DQPSK/PPM的正交再调制技术和基于SOA-MZI的全光异或加密方案。
3、分别设计了基于DQPSK/OOK和DQPSK/PPM正交再调制技术的OCDMA-PON仿真系统,在相同传输条件下,在多用户干扰(Multi-User Interference,MUI)、安全性(Security)、接收灵敏度(Receiver Sensitivity,RS)等方面做了仿真模拟和对比分析。研究分析了未来OCDMA-PON技术与WDM技术融合,即实现WDM-OCDMA-PON的必要性和可行性。
With the rapid development of new multimedia services, the entire communication network, especially the access network facing the enormous pressure as the bandwidth demand continues to grow, resulting the disadvantages in terms of bandwidth and security of the existing TDMA-based bandwidth sharing passive optical network technology become more and more prominent. So the new WDM based PON and OCDMA based PON have been proposed and carried out with in related experiments. With WDM-PON technology, every user exclusive a Independent wavelength. However, the limit of the wavelength resources and the complexity of the allocation of wavelength resources make it difficult to achieve large capacity and flexible user access. In contrast, OCDMA-PON has an excellent network security, information security and easy to implement large-capacity flexible user access, so that it is considered to be the best choice optical in the futuure optical access network.
In this dissertation, the article researched the basic principle, system architecture and key technologies of the OCDMA-PON system. The paper's detailed work including:
1.Summarized the development progress of the passive optical network,introduced OCDMA-PON system's advantages and current investigation status, and described the basic principle,system architecture and key technologies of the system.
2.This dissertation focuses on the main key technologies of the OCDMA-PON such as the design of the optical OCDMA code, the encoding/decoding scheme, scheme of remodulation, the encryption technology, muti-modulation tech and so on. During the Comprehensive analysis of theory and simulation, we designed 127 Gold code as the optical address code and the time-domain spread spectrum phase encoding/decoding scheme,and also we raised the orthogonal remodulation tech based on DQPSK/OOK、DQPSK/PPM and and all-optical XOR encryption scheme based on SOA-MZI.
3.OCDMA-PON simulation systems based on DQPSK/OOK and DQPSK/PPM were designed individually. In the same transmission condition,we simulated and analyse the Multi-User Interference, security and Receiver Sensitivity. After that, we studied the integration of OCDMA-PON and WDM-PON technology in future, that is the necessity and feasibility to realize WDM-OCDMA-PON.
引文
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[2]雷维礼,马立香.接入网技术.北京：清华大学出版社.2008年.
[3]张中荃.接入网技术.北京：人民邮电出版社.2009年.
[4]B G AH N, Y PARK. A symmetric-structure CDMA-PON system and its implementation[J]. Photonics Technology Letters. IEEE.2002.14(9):1381-1383.
[5]Kitayama K, Wang X, Wada N. OCDMA over WDM PON-A Solution Path to Gigabit-Symmetric FTTH[J]. Journal of Lightwave Technology.2006,24(9): 1654-1662.
[6]Ahn,B. G.,Park,Y. A symmetric-structure CDMA-PON system and its implementation.IEEE Photon Technol Lett,2002,14 (9):1381～1383.
[1]李传起,李晓滨.光纤通信OCDMA系统.北京：科学出版社.2008年.
[2]O.P. Hiironen and J. Oksa, "Frequency Hopping OCDMA/WDMA Multiplexing Architecture Using Spectral Interleavers," in Optical Communication, 2002. ECOC 2002.28th European Conference on,2002, pp.1-2.
[3]W.P. Amaya, D.; Capmany, J., "Modeling of a Time-Spreading OCDMA System Including Nonperfect Time Gating, Optical Thresholding, and Fully Asynchronous Signal/Interference Overlapping," Lightwave Technology, Journal of, vol. vol.26, no.7, pp.768-776,2008.
[4]Kwong W C,Yang G C, Design of Multilength Optical Orthogonal Codes for Optical CDMA Multimedia Networks[J],IEEE Transactions on communications.2002,50(8),1258～1265.
[5]Yang G C,Kwong W C,Performance comparison of multiwavelength cdma and WDMA+CDMA for fiber-optic networks[J],IEEE Transactions on communications,1997,45(11),1426～1434.
[6]Yang G C,Variable-Weight Optical Orthogonal Codes for CDMA Networks with Multiple Performance Requirements,IEEE Transactions on communications.1996,44(1),47～55.
[7]Gu F R,Jingshown Wu,Construction and performance analysis of variable-weight optical orthogonal codes for asynchronous optical CDMA systems, Lightwave Technology,2005,23(2):740-748
[8]Djordjevic I B,Vasic B,Rorison J. Multi-weight unipolar codes for multimedia spectral-amplitude-coding optical CDMA systems. Communications Letters.2004.8(4):259-261.
[9]Takahiro Kodama, Naoki Nakagawa, Nobuyuki Kataoka, et al. Secured 2.5Gbit/s,16-ary OCDM block-ciphering with XOR using a single multi-port en/decoder and its transmission experiment with true clock recovery.2009OFC.
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[2]李传起,李晓滨.光纤通信OCDMA系统.北京：科学出版社.2008年.
[3]董海峰,马志钢,吴迪等.多维码OCDMA通信系统的研究,光通信研究,(4),2003年4月：10-12,17.
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[6]Svetisav V, Maric S V, Zoran I, et al. A new family of optical code sequence for use in spread-spectrum fiber-optical local area networks, IEEE Trans. Comm., 41(8),1993:1217-1221.
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[1]Jianbo Chen, Qi Zhang, Chongxiu Yu, Xiangjun Xin, Yan Shi, Fuxiang Deng, and Cang Jin.40Gbit/s PON over OCDMA uplink using DQPSK/OOK Orthogonal Re-modulation. SPIE/COS Photonics Asia 2010.(Beijing, China 18-20 10 2010) Vol.7848.
[2]ZHANG Zi-Xing, XIN Xiang-Jun, YU Chong-Xiu, ZHAO Kun, ZHOU Rui, FANG Jie, ZHANG Qi, ZHANG Wei-Feng, "Asynchronous Multi-user Coherent OCDMA System Using DQPSK Modulation and Bi-balance Detection", Chinese Physics Letters.
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[1]Jianbo Chen, Qi Zhang, Chongxiu Yu, Xiangjun Xin, Yan Shi, Fuxiang Deng, and Cang Jin.40Gbit/s PON over OCDMA uplink using DQPSK/OOK Orthogonal Re-modulation. SPIE/COS Photonics Asia 2010.(Beijing, China 18-20 10 2010) Vol.7848.
[2]Xu Wang, Naoya Wada, Taro Hamanaka Tetsuya Miyazaki, Gabriella Cincotti, Kenichi Kitayama. "OCDMA over WDM Transmission". ICTON '07.9th International Conference on Transparent Optical Networks.July.2007.
[3]Zhihua Zheng, Zongjue Qian, Guochu Shou, Yihong Hu. "OCDMA over WDM System Based on Chebyshev-map Chaotic Spread Spectrum in Passive Optical Network". World Congress on Computer Science and Information Engineering. 2009.
[2]雷维礼,马立香.接入网技术.北京：清华大学出版社.2008年.
[3]张中荃.接入网技术.北京：人民邮电出版社.2009年.
[4]B G AH N, Y PARK. A symmetric-structure CDMA-PON system and its implementation[J]. Photonics Technology Letters. IEEE.2002.14(9):1381-1383.
[5]Kitayama K, Wang X, Wada N. OCDMA over WDM PON-A Solution Path to Gigabit-Symmetric FTTH[J]. Journal of Lightwave Technology.2006,24(9): 1654-1662.
[6]Ahn,B. G.,Park,Y. A symmetric-structure CDMA-PON system and its implementation.IEEE Photon Technol Lett,2002,14 (9):1381～1383.
[1]李传起,李晓滨.光纤通信OCDMA系统.北京：科学出版社.2008年.
[2]O.P. Hiironen and J. Oksa, "Frequency Hopping OCDMA/WDMA Multiplexing Architecture Using Spectral Interleavers," in Optical Communication, 2002. ECOC 2002.28th European Conference on,2002, pp.1-2.
[3]W.P. Amaya, D.; Capmany, J., "Modeling of a Time-Spreading OCDMA System Including Nonperfect Time Gating, Optical Thresholding, and Fully Asynchronous Signal/Interference Overlapping," Lightwave Technology, Journal of, vol. vol.26, no.7, pp.768-776,2008.
[4]Kwong W C,Yang G C, Design of Multilength Optical Orthogonal Codes for Optical CDMA Multimedia Networks[J],IEEE Transactions on communications.2002,50(8),1258～1265.
[5]Yang G C,Kwong W C,Performance comparison of multiwavelength cdma and WDMA+CDMA for fiber-optic networks[J],IEEE Transactions on communications,1997,45(11),1426～1434.
[6]Yang G C,Variable-Weight Optical Orthogonal Codes for CDMA Networks with Multiple Performance Requirements,IEEE Transactions on communications.1996,44(1),47～55.
[7]Gu F R,Jingshown Wu,Construction and performance analysis of variable-weight optical orthogonal codes for asynchronous optical CDMA systems, Lightwave Technology,2005,23(2):740-748
[8]Djordjevic I B,Vasic B,Rorison J. Multi-weight unipolar codes for multimedia spectral-amplitude-coding optical CDMA systems. Communications Letters.2004.8(4):259-261.
[9]Takahiro Kodama, Naoki Nakagawa, Nobuyuki Kataoka, et al. Secured 2.5Gbit/s,16-ary OCDM block-ciphering with XOR using a single multi-port en/decoder and its transmission experiment with true clock recovery.2009OFC.
[1]李传起OCDMA系统地址码码字结构及其编解码技术研究[博士学位论文],南京：东南大学,2004年.
[2]李传起,李晓滨.光纤通信OCDMA系统.北京：科学出版社.2008年.
[3]董海峰,马志钢,吴迪等.多维码OCDMA通信系统的研究,光通信研究,(4),2003年4月：10-12,17.
[4]Fan R K, Chung F R K, Jawad A, et al. Optical orthogonal codes:design, analysis, and applications, IEEE Trans. on Information Theory,35(3),1989:595-596.
[5]Yang G C, Kwong W C. Performance analysis of optical CDMA with prime codes, Electron. Lett.,31(7),1995:569-570.
[6]Svetisav V, Maric S V, Zoran I, et al. A new family of optical code sequence for use in spread-spectrum fiber-optical local area networks, IEEE Trans. Comm., 41(8),1993:1217-1221.
[7]Yang G C. Some new families of optical orthogonal codes for code-division multiple-access fibre-optic networksr, IEE Proc. Commun.,142(6),1995:363-368.
[8]Ho C K, Lee S W, Singh Y P. Optical orthogonal code design using genetic algorithms, Electron. Lett.,37(20),2001:1232-1234.
[9]Ho C K, Singh Y P, Lee S W. Enhancement of a genetic algorithm for optical orthogonal code design using simulated annealing, Proc.2002 World Congress on Evolutionary Computation, Honolulu. Hawaii:IEEE Service Center, 2002:449-453.
[10]Lee S W, Green D H. Performance analysis of optical orthogonal codes in CDMA LANs, IEE Proc. Commun.,145(4),1998:265-271.
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[2]Xu Wang, Naoya Wada, Taro Hamanaka Tetsuya Miyazaki, Gabriella Cincotti, Kenichi Kitayama. "OCDMA over WDM Transmission". ICTON '07.9th International Conference on Transparent Optical Networks.July.2007.
[3]Zhihua Zheng, Zongjue Qian, Guochu Shou, Yihong Hu. "OCDMA over WDM System Based on Chebyshev-map Chaotic Spread Spectrum in Passive Optical Network". World Congress on Computer Science and Information Engineering. 2009.