where offering resources represents a cost for ISPs while the universal streaming of the P2P system represents a gain. We
first provide a mathematical description of this framework by starting with a simple scenario with two ISPs and we later
generalize to the case with an arbitrary number of interacting ISPs.
The 2 ISPs game. Inequality (1) states that the system is providing universal streaming (i.e., the P2P streaming service is
working properly) if