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Mobile network operators are facing the difficult task of significantlyincreasing capacity to meet projected demand while keeping CAPEX and OPEX down.We argue that infrastructure sharing is a key consideration in operators'planning of the evolution of their networks, and that such planning can beviewed as a stage in the cognitive cycle. In this paper, we present a frameworkto model this planning process while taking into account both the ability toshare resources and the constraints imposed by competition regulation (thelatter quantified using the Herfindahl index). Using real-world demand anddeployment data, we find that the ability to share infrastructure essentiallymoves capacity from rural, sparsely populated areas (where some of the currentinfrastructure can be decommissioned) to urban ones (where most of thenext-generation base stations would be deployed), with significant increases inresource efficiency. Tight competition regulation somewhat limits the abilityto share but does not entirely jeopardize those gains, while having thesecondary effect of encouraging the wider deployment of next-generationtechnologies.

A Sharing- and Competition-Aware Framework for Cellular Network Evolution Planning