Throughput performance evaluation of multiservice multirate OCDMA in flexible networks

Thiago R. Raddo, Anderson L. Sanches, Idelfonso Tafur Monroy, Ben Hur V. Borges

Research output: Contribution to journalArticleAcademicpeer-review

23 Citations (Scopus)
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In this paper, new analytical formalisms to evaluate the packet throughput of multiservice multirate slotted ALOHA optical code-division multiple-access (OCDMA) networks are proposed. The proposed formalisms can be successfully applied to 1-D and 2-D OCDMA networks with any number of user classes in the system. The bit error rate (BER) and packet correct probability expressions are derived, considering the multiple-access interference as binomially distributed. Packet throughput expressions, on the other hand, are derived considering Poisson, binomial, and Markov chain approaches for the composite packet arrivals distributions, with the latter defined as benchmark. A throughput performance evaluation is carried out for two distinct user code sequences separately, namely, 1-D and 2-D multiweight multilength optical orthogonal code (MWML-OOC). Numerical results show that the Poisson approach underestimates the throughput performance in unacceptable levels and incorrectly predicts the number of successfully received packets for most offered load values even in favorable conditions, such as for the 2-D MWML-OOC OCDMA network with a considerably large number of simultaneous users. On the other hand, the binomial approach proved to be more straightforward, computationally more efficient, and just as accurate as the Markov chain approach.

Original languageEnglish
Article number7900415
Number of pages15
JournalIEEE Photonics Journal
Issue number1
Publication statusPublished - 1 Feb 2016
Externally publishedYes


  • flexible networks
  • throughput


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