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This dissertation, Novel Resource Allocation Schemes in Optical Burst Switching Networks by Guangming, Li, 李光明, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled Novel Resource Allocation Schemes in Optical Burst Switching Networks submitted by Li Guangming for the degree of Doctor of Philosophy at The University of Hong Kong in September 2006 Optical communication systems will play an important role in the next generation network. At present, there are three major candidate solutions for optical communication systems based on wavelength-division multiplexing (WDM) technology: optical circuit switching (OCS), optical packet switching (OPS), and optical burst switching (OBS). Given the limitations of current optical processing capability and lack of practical optical buffers, OBS is considered to be the top choice for the next generation network in the near term since it is more efficient than OCS in terms of wavelength utilization efficiency and it does not require the technological breakthroughs needed to make OPS a reality. The main objective of our research is to develop novel resource allocation schemes to improve network performance in OBS networks. We start with a comprehensive review of existing research in OBS networks. We then present the relationships between network performance and network parameters in OBS networks, and provide the guidelines for choosing variousreservation schemes and scheduling algorithms in OBS networks. Switching constraint resolutions are proposed to alleviate the negative effects due to switching configuration time. Next, we propose a window-based reservation scheme and the use of regional controllers to reduce burst contentions. The advantage of using regional controllers and the window-based reservation scheme is that they can be implemented in a generic OBS network and only increase the electronic processing. Simulations show that the proposed schemes can improve network performance even if the network is heavily loaded. Then, we propose a straightforward reservation scheme, dynamic offset, in OBS networks with fiber delay lines (FDLs). Simulations show that the proposed scheme has lower loss probability than the general scheme. We further study the problem of dimensioning fiber delay lines and present the impacts of their parameters on network performance. Finally, we propose a delayed reservation decision scheme in OBS networks with FDLs. Simulations show that the proposed scheme can improve network performance compared with existing schemes. An abstract of exactly 318 words Signed: Li, Guangming DOI: 10.5353/th_b3705104 Subjects: Packet switching (Data transmission)Wavelength division multiplexingOptical communications

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