  The connectivity properties of ad hoc networks have been extensively studied
over the past few years, from local observables, to global network properties.
In this paper we introduce a novel layer of network dynamics which lives and
evolves on top of the ad hoc network. Nodes are assumed selfish and a
snow-drift type game is defined dictating the way nodes decide to allocate
their cooperative resource efforts towards other nodes in the network. The
dynamics are strongly coupled with the physical network causing the cooperation
network topology to converge towards a stable equilibrium state, a global
maximum of the total pay-off. We study this convergence from a connectivity
perspective and analyse the inherent parameter dependence. Moreover, we show
that direct reciprocity can be an efficient incentive to promote cooperation
within the network and discuss the analogies between our simple yet tractable
framework with D2D proximity based services such as LTE-Direct. We argue that
cooperative network dynamics have many application in ICT, not just ad hoc
networks, and similar models as the one described herein can be devised and
studied in their own right.
