scope:

This Recommendation | International Standard specifies the Enhanced Communications Transport Protocol (ECTP), which is a transport protocol designed to support Internet multicast applications over multicast-capable IP networks.

This Recommendation | International Standard specifies the ECTP for the simplex multicast transport connection that consists of one sender and many receivers. This Recommendation | International Standard specifies the protocol procedures for the following protocol operations:

a) connection creation with tree creation;

b) multicast data transmission;

c) tree-based reliability control with error detection, retransmission request and retransmission;

d) late join and leave;

e) tree membership maintenance; and

f) connection termination.