http://www.rfc-editor.org/rfc/rfc4336.txt
RFC 4336: Problem Statement for the Datagram Congestion Control Protocol (DCCP), S. Floyd, M. Handley, E. Kohler2006-03-01T23:00:00-00:00This document describes for the historical record the motivation behind the Datagram Congestion Control Protocol (DCCP), an unreliable transport protocol incorporating end-to-end congestion control. DCCP implements a congestion-controlled, unreliable flow of datagrams for use by applications such as streaming media or on-line games. This memo provides information for the Internet community.