Peer-to-peer (P2P) streaming
TV services over the Internet can be provided either exploiting IP multicast functionalities or relying on an end-to-end (P2P) approach. The former technique will only work on a network infrastructure controlled by a single broadband operator, due to limitations of IP multicast techniques. On the contrary, the P2P approach has been successfully exploited to overcome these limits and can potentially offer a scalable planetary infrastructure. Recently, several P2P-TV systems started to show up, with the last generation offering High Quality TV (P2P-HQTV) systems, providing a ubiquitous access to the service. These same potentialities of P2P-TV systems constitute a worry for network carriers since the traffic they generate may potentially grow without control, causing a degradation of the quality of service perceived by Internet users or even the network collapse (and the consequent failure of the P2P-HQTV service itself!). The research activities in the field of P2P-TV mainly aims at:
- providing a careful analysis of the impact that a large deployment of both general P2P-TV and P2P-HQTV services may have on the Internet, through a detailed characterization of the traffic they generate;
- providing guidelines for P2P-TV developers regarding the design of systems that minimize the impact on the underlying transport network while optimizing the user perceived quality;
- providing a roadmap for internet service providers to better exploit the network bandwidth by showing simple and minimum-cost actions that can be taken in presence of P2P-TV traffic.
Contact person: LEONARDI EMILIO