Deng-Sheng Wang

Publications (2)0 Total impact

• Conference Proceeding: Reconfigurable Coded WDM with Arrayed-Waveguide-Gratings to Enhance Confidentiality on Fiber-to-the-Home Networks

  Jen-Fa Huang, Yao-Tang Chang, Chuan-Ching Sue, Deng-Sheng Wang
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  ABSTRACT: In order to enhance the degree of confidentiality in the last mile access network, a reconfigurable coded wavelength-division-multiplexing Ethernet passive optical network scheme (reconfigurable coded WDM-EPON) is presented to protect against eavesdropper on fiber to the home (FTTH) network. Rather than employing wavelength-hopping, time-spreading or spectral phase coding approaches, which all involve huge code space, this study applies spectral amplitude coding (SAC) with unipolar maximal-length sequence (M-sequence) as signature address code. By exploiting the inherent cyclic properties in arrayed-waveguide-grating (AWG) routers, the AWG-based reconfigurable encoder/decoder (codecs), which requires minimal code space but additional optical switches and controller units, is demonstrated. Furthermore, both qualitative and quantitative analyses of protecting against eavesdropping are investigated. Under eavesdropping with a series of photo-detection strategy, the proposed reconfigurable coded WDM-EPON scheme in terms of the degree of confidentiality (DOC) is improved 673 times compared to the conventional wavelength-division-multiplexing EPON (WDM-EPON) for system capacity of N=127
  Communications, 2006. APCC '06. Asia-Pacific Conference on; 09/2006
• Conference Proceeding: A Robust Design of Reconfigurable Encoder and Decoder Against Un-authorized Users in Optical CDMA Networks

  Chuan-Ching Sue, Chao-Yang Lee, Jen-Fa Huang, Yao-Tang Chang, Deng-Sheng Wang
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  ABSTRACT: In this paper, an enhanced security mechanism is presented against eavesdropping on spectral amplitude coding (SAC) optical code-division multiple-access (OCDMA) access networks. The reconfigurable coder/decoder (codec) which was constructed with arrayed-waveguide-grating (AWG), optical switch and additional controller unit is used as the basic system to realize the implementation of dynamic code matrix assignment. Instead of employing a huge code space, we adopt the spectral amplitude coding (SAC) with unipolar M-sequence code matrix for a specific signature address (coding) and its match address codeword (decoding). Furthermore, a weighted load balance problem based on the power distribution on each wavelength is investigated, and then a dynamic reconfiguration policy is proposed to choose the best code matrix assignment with the minimum weighted degree of load balance. The evaluation results show that the dynamic reconfiguration policy can outperform a class of static policies in terms of two performance metrics, weighted degree of load balancing and the number of register shifting.
  TENCON 2005 2005 IEEE Region 10; 12/2005