Transmitting device, transmitting method, and receiving method for multicast and broadcast service

摘要

A transmitting device for a multicast and broadcast service according to an embodiment of the present invention includes: an encoder that receives data to generate parity; an ARQ block generator that generates a first automatic repeat request (ARQ) block by dividing the data and generates a second ARQ block by dividing the parity; a PDU generator that generates a first protocol data unit (PDU) including the first ARQ block and a second protocol unit (PDU) including the second ARQ block; and a transmitter that transmits the first PDU and the second PDU to a plurality of terminals.

主权项

1. A transmitting device for a multicast and broadcast service, the transmitting device comprising:
an encoder configured to receive data to generate parity; an ARQ block generator configured to generate first automatic repeat request (ARQ) blocks by dividing the data, and generate second ARQ blocks by dividing the parity; a PDU generator configured to generate a first protocol data unit (PDU) comprising a specified number of the first ARQ blocks and a second protocol unit (PDU) comprising a specified number of the second ARQ blocks; and a transmitter configured to:
transmit the first PDUs to a plurality of terminals;receive a non-acknowledgement response from at least one terminal after transmitting the first PDU, the non-acknowledgement response indicating the number of lost first ARQ blocks;determine whether or not the second ARQ blocks are exhausted;when the second ARQ blocks are remaining, transmit the second PDU in accordance with the non-acknowledge response; andwhen the second ARQ blocks are exhausted, directly transmit the lost first ARQ blocks to the at least one terminal that transmitted the non-acknowledgement response.