Patent ID: 9450713
Filing Date: 2016-09-20
CPC Classification: H04L

Claim Text:
1. A method comprising: generating at a DSL transmitter time-marker information for a data unit, wherein generating at the DSL transmitter time-marker information includes generating time-marker information based on an anticipated sequence number of a transmit multicarrier symbol or an anticipated sequence number of a FEC codeword, wherein the anticipated sequence number is calculated based on an expected delay from a predetermined first point of a transmitter processing flow to a predetermined second point of the transmitter processing flow; generating at the DSL transmitter a sequence ID for the data unit; storing the time-marker information at the DSL transmitter; transmitting the data unit together with the sequence ID from the DSL transmitter to a DSL receiver; transmitting a request for retransmission from the DSL receiver to the DSL transmitter; and based on the request, retransmitting the data unit including the time-marker information from the DSL transmitter to the DSL receiver.