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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


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.

Original languageEnglish
Title of host publicationTENCON 2005 - 2005 IEEE Region 10 Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)0780393112, 9780780393110
Publication statusPublished - 2005 Jan 1
EventTENCON 2005 - 2005 IEEE Region 10 Conference - Melbourne, Australia
Duration: 2005 Nov 212005 Nov 24

Publication series

NameIEEE Region 10 Annual International Conference, Proceedings/TENCON
ISSN (Print)2159-3442
ISSN (Electronic)2159-3450


OtherTENCON 2005 - 2005 IEEE Region 10 Conference

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering


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