On-line resources allocation for Asynchronous Transfer Mode networks with rerouting

On-line resources allocation for Asynchronous Transfer Mode networks with rerouting

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Article ID: iaor20072363
Country: United Kingdom
Volume: 33
Issue: 10
Start Page Number: 2891
End Page Number: 2917
Publication Date: Oct 2006
Journal: Computers and Operations Research
Authors: , ,
Keywords: communication, networks, heuristics, programming: constraints
Abstract:

This paper presents an application we developed for France Telecom R&D to solve a difficult real-life network problem. The problem takes place in an Asynchronous Transfer Mode network administration context and consists in planning demands of connection over a period of 1 year. A new demand is accepted if both bandwidth and Quality of Service requirements are satisfied. Demands are not known prior to the assignment and must be performed on-line according to their arrival. Moreover, the acceptance or the rejection of a demand must be decided within a given time of 1 min. First, we look for a route satisfying the new demand. In case of failure, we try to reroute some already accepted connections in order to satisfy this new demand. Rerouting has been modelled as a Weighted Constraint Satisfaction Problem (WCSP) and solved by VNS/LDS + CP, a hybrid method well suited for solving WCSPs in on-line contexts. Experiments show that our rerouting enables to accept an average of 67% of demands that would be rejected otherwise.

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