Loading...

Designing Survivable Elastic Optical Networks to Support Multi-Class Traffic

Ehsani Moghaddam, Elham | 2018

1674 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 51223 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Salehi, Javad; Beyranvand, Hamzeh
  7. Abstract:
  8. Recently, elastic optical networks have attracted high interest to provide more efficiency and scalability in optical core networks. Due to the high transmission rates and the importance of the transmitted data in these networks, a failure may cause vast data losses. Thus, addressing the problem of survivability in these networks is of great importance. According to different time domain behaviors and reliability requirements of incoming traffic, supporting different quality of services is another important concern. On the other hand, using multi-core fibers is a way to scale the network capacity to provide high-speed transmission services but there is a concern that the inter-core crosstalk that occurs between adjacent cores transmitting data on the same frequencies, affects the quality of transmitted signals. In this thesis, several algorithms are proposed to address the routing and spectrum assignment problem in an elastic optical network with single or multi-core fibers, supporting different class of services and providing survivability against fiber failures. First, mathematical formulations for modeling this problem are extracted for elastic optical networks with single core fibers as an integer linear programming (ILP) and then by considering the crosstalk between adjacent cores, it is extended to a mixed integer linear programming (MILP). Also several heuristic algorithms with suboptimal solutions are proposed to solve the introduced problems with close performance but in a faster way. The performance of the proposed methods is evaluated by simulating several sample networks based on benchmarks such as bandwidth blocking probability, average initial delay, and the maximum allocated frequency slice index
  9. Keywords:
  10. Elastic Optical Networks (EON) ; Survivability ; Multicore Fibers ; Mixed Integer Linear Programming ; Immediate Reservation ; Advance Reservation

 Digital Object List

 Bookmark

...see more