Paper Info
Title
Multicast routing from a set of data centers in elastic optical networks
Abstract
This paper introduces the Multi-Server Multicast (MSM) approach for Content Delivery Networks (CDNs) delivering services offered by a set of Data Centers (DCs). All DCs offer the same services. The network is an Elastic Optical Network (EON) and for a good performance, routing is performed directly at the optical layer. Optical switches have heterogeneous capacities, that is, light splitting is not available in all switches. Moreover, frequency slot conversion is not possible in any of them. We account for the degradation that optical signals suffer both in the splitting nodes, as well as across fiber links to compute their transmission reach. The optimal solution of the MSM is a set of light-hierarchies. This multicast route contains a light trail from one of the DCs to each of the destinations with respect to the optical constraints while optimizing an objective (e.g., minimizing a function). Finding such a structure is often an NP-hard problem. The light-hierarchies initiated from different DCs permit delivering the multicast session to all end-users with a better utilization of the optical resources, while also reducing multicast session latencies, as contents can be delivered from such DCs closer to end-users. We propose an Integer Linear Programming (ILP) formulation to optimally decide on which light-hierarchies should be setup. Simulation results illustrate the benefits of MSM in two reference backbone networks.
Year
DOI
Venue
2019
10.1016/j.osn.2019.04.002
Optical Switching and Networking
Keywords
Field
DocType
Data centers elastic optical networks,Multicast session planning,Physical layer impairments,Degree-constrained steiner problem,Light-hierarchy,ILP
Content delivery,Optical switch,Computer science,Optical layer,Computer network,Integer programming,Multicast,Distributed computing
Journal
Volume
ISSN
Citations 
34
1573-4277
0
PageRank 
References 
Authors
0.34
0
5
Name
Order
Citations
PageRank
Miklós Molnár161.52
Dinh Danh Le200.34
Jordi Perelló311925.62
Josep Solé-pareta443658.67
Conor McArdle5316.39