The present disclosure relates to a method for use in a Peer to Peer (P2P) streaming system over a mobile network, the method comprising: receiving from a P2P tracker of said at least one P2P tracker a notification message indicating a first mobile peer to be served by the first P2P proxy and request information of the first mobile peer indicating a first media content requested by the first mobile peer and peers where the first media content is available, the peers being not served by the first P2P proxy; checking whether the first media content is buffered in the first P2P proxy; initiating a P2P session with at least one or more peers among the peers to fetch the first media content, when the first media content is not buffered in the first P2P proxy; and sending the fetched first media content to the first mobile peer.