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Energy Efficient Routing and Resource Allocation in Optical Networks

Fallahpour, Ahmad | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46234 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Salehi,Javad
  7. Abstract:
  8. As the Internet traffic grows, the energy efficiency gains more attention as a design factor for the planning and operation of telecommunication networks. Therefore, researchers begin to devise solutions for energy conservation in many scientific disciplines. In this thesis, we focus on the study of energy efficiency in optical transport networks, specially, the newly proposed Spectrum sLICed Elastic optical path (SLICE) networks architecture. First of all, we will introduce energy consuming elements in SLICE networks and their power consumption model. Next, we present a dynamic energy efficient routing and spectrum assignment algorithm (EE-RSA) with regenerator placement (RP) capability for elastic optical networks (EONs). In this algorithm, the arrived connection request is served by finding the most energy-efficient path among the possible candidate paths. Then, the quality of transmission (QoT) of the selected path is evaluated in terms of bit error rate. If the estimated QoT is higher than a predetermined threshold, the designated path is assigned to the incoming request, otherwise, the RP algorithm is utilized to place a regenerator at the most energy-efficient position. In addition, the demanded transmission rate and required QoT are fulfilled by assessing different modulation formats and selecting appropriate modulation format in terms of power consumption and blocking probability. The results of simulations reveal that the proposed algorithms have better performance than other existing schemes in terms of network's total energy consumption and acceptable blocking probability. Finally, we generalize our proposed algorithm to manycast routing in SLICE architecture. We propose an energy-efficient manycast routing and spectrum assignment (EEM-RSA). Again, simulation results reveal that the proposed EEM-RSA outperforms its counterparts in terms of energy-consumption, while its blocking probability is approximately the same as that of EASP-RSA and EUSP-RSA
  9. Keywords:
  10. Energy Optimization ; Multicasting Comunications ; Routing ; Optical Core Networks ; Regeneration Signal

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