Availability optimization in a ring-based network topology

Philippe Ezran , Yoram Haddad (1) , Merouane Debbah (2)

1 Computer Science Department
2 LANEAS - Large Networks and Systems Group

Cellular networks are nowadays considered as a major critical infrastructure. Resiliency to failure due to disasters, weather based disruptions or malicious activities is essential. In the case of ring topology, because of delay and availability requirements, a wireless network connected to an aggregation node must sometimes be split into several rings. In this paper, we study the availability optimization in a ring-based network topology for a given number of cellular sites and a given size of rings. We prove that if each ring includes 3 nodes, the problem can be solved in a polynomial time, while for bigger rings, the problem is NP-hard. In this latter case, we provide approximation methods based on linear programming in order to converge to the solution.

Mots clés: Cellular networks; topology; ring; availability; resiliency

Domaines: Sciences de l'ingénieur [physics]; Optimisation et contrôle [math.OC]

Philippe Ezran, Yoram Haddad, Merouane Debbah. Availability optimization in a ring-based network topology. Computer Networks, 2017, 124, pp.27 - 32. ⟨10.1016/j.comnet.2017.05.013⟩. ⟨hal-01778653⟩