Loading...

Energy Efficiency in Elastic Optical Networks

Ahmadi, Mahta | 2021

311 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54066 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Pakravan, Mohammad Reza
  7. Abstract:
  8. Telecommunications operators look forward to network virtualization to reduce capital and operational expenditures. Optimal performance of the virtualized networks requires efficient resource allocation. On the other hand, in recent years, traffic growth and its dynamic behavior are two main drivers for the development of elastic optical networks. In this research, the problem of resource allocation for virtualized network function requests over an elastic optical network is investigated. Due to the high cost of energy consumption, energy efficiency is considered as the objective of the resource allocation problem. Conventional pure static and dynamic solutions are not suitable for efficient resource allocation, and therefore, a joint solution exploiting the advantages of both conventional approaches seems more effective. The output of the problem not only determines the virtualized network function placement but also considers the physical network limitations to specify the routing and spectrum assignment. The resource allocation problem is formulated as a stochastic optimization, and then the Lyapunov algorithm is adopted to decompose it into several consecutive simpler sub-problems. We consider the delay requirement of the traffic in our system model. Applying our proposed algorithm reduces the power consumption by 32% compared to the conventional static resource allocation schemes. Also, by considering the quality of service differentiation, a further performance improvement, up to 54%, is obtained. This extra improvement is due to looser delay requirements of the delay-tolerant requests
  9. Keywords:
  10. Elastic Optical Networks (EON) ; Resources Allocation ; Service Quality ; Network Function Virtualization ; Stochastic Lyapunov Optimization ; Network Virtualization

 Digital Object List

 Bookmark

No TOC