Error recovery method and device for same using multichannel in wireless communication system
In the present application, a method is disclosed for receiving data from a base station by means of a terminal in a wireless communication system. In particular, the method comprises the steps of: receiving the data from the base station through a multicast channel; when decoding of the data is unsuccessful, transmitting a retransmission request signal for the data to the base station; and receiving a retransmission of the data from the base station through a unicast channel, wherein the data received through the multicast channel and the data received through the unicast channel are characterized by including the same transport block having mutually different and dissimilar RVs (Redundancy Versions).
1. A method of receiving data from a base station by a user equipment in a wireless access system, the method comprising:
receiving the data from the base station through a multicast channel;
transmitting a retransmission request signal for the data to the base station when a decoding failure of the data occurs; and
receiving a retransmission of the data from the base station through a unicast channel,
wherein each of the data received through the multicast channel and the data received through the unicast channel include a same transport block having a different RV (redundancy version),
wherein if the retransmission request signal is transmitted over a predetermined count, the method further comprises receiving recovery data of the data from an adjacent base station of the base station using a predefined recovery data specific resource for the adjacent base station.
2. The method of claim 1 , the receiving the retransmission of the data from the base station through the unicast channel, comprising receiving a control signal for the reception of the data retransmission, wherein the control signal includes information on the multicast channel and information on a timing point at which the data is received through the multicast channel.
3. The method of claim 1 , wherein the retransmission request signal includes information on the multicast channel and information on a timing point at which the data is received through the multicast channel.
4. The method of claim 1 , further comprising reporting channel state information to the base station, wherein a precoding and MCS (modulation and coding scheme) level determined on the basis of the channel state information are applied to the unicast channel.