Dynamic adaptive spectrum allocation in flexible grid optical network with multi‐path routing

Autor: Ujjwal Ujjwal, Neha Mahala, Jaisingh Thangaraj
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: IET Communications, Vol 15, Iss 2, Pp 211-223 (2021)
Druh dokumentu: article
ISSN: 1751-8636
1751-8628
DOI: 10.1049/cmu2.12046
Popis: Abstract Fragmentation is one of the major issues in elastic optical network (EON) due to its dynamic characteristics which may possibly degrade the spectrum efficiency. Several techniques have been presented in the literature to get the optimal solution of this problem while multi‐path provisioning comes out to be very compelling among them. In multi‐path provisioning enable networks, multi‐path routing and spectrum assignment (MPRSA) creates further complications due to the hardware availability and more spectrum consumption. This paper presents a novel technique termed as adaptive service provisioning (ASP) to come up with a solution of the MPRSA problem and it minimizes the spectrum fragments in the network by precisely managing the scattered spectrum slots. This technique performs the adaptive traffic demand splitting on disjoint paths in case it is unable to be served by k‐shortest routing paths based on the parameters such as hardware support, capacity available and demand. An integer linear programming (ILP) model as well as a heuristic algorithm for solving MPRSA problem in large optical networks where ILP is not compliant is developed. Numerical simulations are performed to investigate the performance of the algorithm in terms of blocking probability and spectrum utilization.
Databáze: Directory of Open Access Journals
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