Streaming video with TFRC- simulation approach

One of most serious problems in shared networks is coexistence of elastic and inelastic traffic in the same link. During such a transmission, typically phenomenon of unexpected TCP collapse (so-called "TCP-unfriendliness") is observed. The phenomenon con avoided using TCP-friendly transport protocols instead of typical real-time protocols (as RTP or UDP). The most popular TCP-friendly protocol, able to carry multimedia, is TFRC (TCP-friendly Rate Control) transport protocol. In the paper an analysis of TFRC protocol is Presented. Analysis was carried out using an event-driven ns-2 simulator and focuses both on the coexistence of inelastic (TFRC) and elastic (TCP) traffic as well as protocol\´s suitability for multimedia applications. Results show that TFRC is appropriate for carrying real-time video, although "borrowed" from TCP tendency to fair bandwidth allocation in some cases can lead to pathological behaviours.