Thomas Kunz
Systems and Computer Engineering
6
Link Layer Mechanisms
Link Level Retransmissions
Link Level Retransmissions
nLink
level retransmission schemes retransmit a packet at the link layer, if
errors are detected
nRetransmission
overhead incurred only if errors occur
–unlike FEC overhead
In general
nUse
FEC to correct a small number of errors
nUse
link level retransmission when FEC capability is exceeded