Risk-Aware SLA Negotiation

Mohamed Lamine Lamali (1) , Helia Pouyllau (2) , Johanne Cohen (3) , Anne Bouillard (4, 5, 6) , Dominique Barth (3)

1 Alcatel-Lucent Bell Labs France [Nozay]
2 Thales Research and Technology [Palaiseau]
3 PRISM - Parallélisme, Réseaux, Systèmes, Modélisation
4 LINCS - Laboratory of Information, Network and Communication Sciences
5 LIENS - Laboratoire d'informatique de l'école normale supérieure
6 DYOGENE - Dynamics of Geometric Networks

In order to assure Quality of Service (QoS) connectivity, Network Service Providers (NSPs) negotiate Service Level Agreements (SLAs). However, a committed SLA might fail to respect its QoS promises. In such a case, the customer is refunded. To maximize their revenues, the NSPs must deal with risks of SLA violations, which are correlated to their network capacities. Due to the complexity of the problem, we rst study a system with one NSP provider and give a method to compute its risk-aware optimal strategy using (max; +)-algebras. Using the same method, we study the case where two NSPs collaborate and the case where they compete, and we derive the Price of Anarchy. This method provides optimal negotiation strategies but, when modeling customers' reaction to SLA failure, analytical results do not hold. Hence, we propose a learning framework that chooses the NSP risk-aware optimal strategy under failures capturing the impact of reputation. Finally, by simulation, we observe how the NSP can bene t from such a framework.

Domaines: Réseaux et télécommunications [cs.NI]; Apprentissage [cs.LG]

Mohamed Lamine Lamali, Helia Pouyllau, Johanne Cohen, Anne Bouillard, Dominique Barth. Risk-Aware SLA Negotiation. VALUETOOLS - 7th International Conference on Performance Evaluation Methodologies and Tools, Dec 2013, Turin, Italy. ⟨hal-00920699⟩