| source ^ source | packets | packets v | +------------+ +------------+ | Transport | | Transport | | | | | | +---+ +--+ | signaling| +---+ +--+ | | |FEC| |CC| | recovered| |FEC| |CC| | | +---+ +--+ | symbols| +---+ +--+ | | | <==| | | |network network| | | |packets information| | +------------+ ==> <==+------------+ SENDER RECEIVER