The Datagram Congestion Control Protocol (DCCP) is a transport protocol that provides bidirectional unicast connections of congestion-controlled unreliable datagrams. DCCP is suitable for applications that transfer fairly large amounts of data and that can benefit from control over the tradeoff between timeliness and reliability.
T. Anwar, C. Liu, H. Vu, and M. Islam. Proceedings of the 25th ACM International on Conference on Information and Knowledge Management, page 2323--2328. New York, NY, USA, ACM, (2016)