In this work we study the asymptotic traffic behaviour in Gromov's hyperbolic spaces when the traffic decays exponentially with the distance. We prove that under general conditions, there exist a phase transition between local and global traffic. More specifically, assume that the traffic rate between two nodes u and v is given by R(u, v) = -d(u,v) where d(u, v) is the distance between the nodes, then there exists a constant D that depends on the geometry of the network such that if 1 < < D the traffic is global and there is a small set of highly congested nodes called the core. However, if > D then the traffic is essentially local and the core is empty.
Yuliy Baryshnikov, Gabriel H. Tucci