Method, apparatus and system for transmitting data on digital subscriber line

摘要

A method includes the following steps: sorting service data into retransmissive service data and non-retransmissive service data; allocating resources to the retransmissive service data and the non-retransmissive service data respectively, and encapsulating the data into DTUs according to the allocated resources; sending, by a sender, the DTU that bears the service data; receiving, by the sender, a retransmission request that is sent according to a result of judging a bit error and a type of the retransmissive service, where the retransmission request carries information about the DTU that needs to be retransmitted; and retransmitting, by the sender, a corresponding DTU that bears the retransmissive service data requested for retransmission.

主权项

1. A method for transmitting data on a Digital Subscriber Line (DSL), the method comprising:
sorting service data into retransmissive service data and non-retransmissive service data at a Physical Media Specific Transmission Convergence (PMS-TC) sublayer of a retransmission layer; allocating resources to the retransmissive service data and the non-retransmissive service data respectively, wherein granularity of the allocated resources is one of a DTU comprising multiple Reed-Solomon (RS) codewords and an RS codeword in the DTU, and encapsulating the data into a Data Transfer Units (DTU) according to the allocated resources; sending, by a sender, the DTU that bears the service data; receiving, by the sender, a retransmission request that is sent according to a result of the DTU having a bit error and service the DTU at least comprising retransmissive service data, wherein the retransmission request carries information about the DTU that needs to be retransmitted; and retransmitting, by the sender, a corresponding DTU, where the DTU bears the retransmissive service data requested for retransmission.