Patent ID: 8381055
Filing Date: 2013-02-19
Classification: H04L

Abstract:
1. A apparatus for transmitting data in an xDSL system, comprising: a transmitter that sends data over an xDSL system in the form of a data transmission unit (DTU), the transmitter having a transport, protocol specific transmission convergence (TPS-TC) communication sublayer and a physical media specific transmission convergence (PMS-TC) communication sublayer; a retransmission layer disposed between the TPS-TC and PMS-TC communication sublayers; and a retransmission unit that is implemented in the retransmission sublayer, the retransmission unit including a retransmission buffer that stores and indexes transmitted DTUs in retransmit containers, the retransmit container being defined as a time slot corresponding to a sent DTU; wherein the retransmission unit is configured to respond to a retransmission request indicating which stored DTU should be retransmitted, wherein the stored DTU to be retransmitted is identified by its corresponding retransmit container.