Design and Quality of Service Improvement in Optical Code Division Multiple Access Networks

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Hadi, Mohammad | 2013

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 44798 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Pakravan, Mohammad Reza
Abstract:
Considering the advantages of optical communications and code division multiple access technique, Optical Code Division Multiple Access Networks (OCDMANs) was introduced. Thence, many researchers have suggested methods for creating Quality of Service (QoS) differentiated classes in OCDMANs. In this thesis, we have comprehensive review on the QoS assignment methods and enhance them by offering new techniques. In physical layer, we concentrate on variable chip rate OCDMANs and in MAC sub-layer, a new algorithm named Adaptive Level Control (ALC) is introduced. Then, we focus on the physical design of OCDMANs. Firstly, we solve the problem of one-class OCDMAN and introduce few simple and mathematical design rules. Secondly, the introduced design rules are generalized to the design problem of a two-class OCDMAN and consequently we get few simple and accurate rules of thumb. The presented design rules are extracted using analytical mathematics and practical approximations. Finally, the integrity of the suggested rules are justified using simulation and analysis
Keywords:
Service Quality ; Design ; Physical Layer ; Optical Code Division Multiple Access (OCDMA) ; Optical Orthogonal Code (OOC) ; Multiple Access Control (MAC)Sublayer