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Multi-quality of service routing and spectrum assignment in elastic optical networks

Shahsavari, S ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/ICC.2017.7997409
  3. Abstract:
  4. In this paper, we investigate multi-quality of service (QoS) routing and spectrum assignment in elastic optical networks (EONs) by utilizing network state information in terms of bandwidth usage and holding time of established connections. Toward this aim, two types of traffic, namely big data traffic (BDT) requests, and fixed rate flow requests (FLRs) are considered, where BDTs can tolerate a pre-determined initial delay while FLRs must be served immediately without any delay. We assume that both frequency and time usage of optical bandwidth is slotted, and accordingly optical resources are defined in a two-dimensional (2D) time/frequency domain, where the smallest resource is specified with its time and frequency slot number. Furthermore, we define two controlling coefficients determining the ratio of time and spectrum slots which can be assigned to BDTs. By selecting various values for these coefficients, network manager will be able to support different class of services and change the relative priorities of different classes. In addition, for each coefficient we obtain a threshold determining the upper bound on the number of time or frequency slots allocated to BDTs. Our results highlight the relation between the blocking probability and the value of these thresholds. In particular, the results show that assigning smaller resource blocks will result into lower blocking probability for both FLRs and BDTs. In addition, the maximum initial delay plays an important role in the blocking probability of BDTs. © 2017 IEEE
  5. Keywords:
  6. Big data traffic (BUT) ; Blocking probability ; Elastic optical networks (EONs) ; Multi-quality of service ; Network state information
  7. Source: IEEE International Conference on Communications, 21 May 2017 through 25 May 2017 ; 2017 ; 15503607 (ISSN) ; 9781467389990 (ISBN)
  8. URL: https://ieeexplore.ieee.org/document/7997409