Method and apparatus for transmitting and receiving data in a wireless communication system that supports a relay node
A method and apparatus for transmitting and receiving data in a wireless communication system that supports a relay node are disclosed, wherein an open-loop mode is provided between the relay node and a user equipment. A method for transmitting data from a relay node to a user equipment comprises the steps of receiving information on a first condition related to transmission of the data from a base station; receiving first data including a plurality of sequential codes from the base station; and transmitting second data corresponding a part of the first data to the user equipment in accordance with the first condition if decoding of the first code of the plurality of codes is successfully performed.
1. A method for transmitting, by a relay node (RN), a re-encoded data to a user equipment (UE), the method comprising:
receiving information on a codes and channels condition, that is to be used for forthcoming re-encoding and forthcoming transmitting, from a base station (BS);
receiving, from the BS, and decoding an encoded data;
re-encoding the decoded data in accordance with the codes and channels condition; and
when the decoding is successfully performed in an M-th subframe, transmitting the re-encoded data from an M+1-th subframe to the UE in accordance with the codes and channels condition,
wherein the codes and channels condition indicates that:
the re-encoding and the transmitting are performed by using a plurality of sequential codes and channels which are to be used from the M+1-th subframe by the BS,
the re-encoding and the transmitting are performed by using a code and channel which are used in the M-th subframe by the BS, or
the re-encoding and the transmitting are performed by using a plurality of sequential codes and channels which are used from an initial subframe by the BS.
2. The method according to claim 1 , further comprising:
receiving a signal including an acknowledgement (ACK) or a negative ACK (NACK) information regarding the encoded data or the re-encoded data from the UE; and
transmitting the signal to the BS.
3. The method according to claim 1 , further comprising:
receiving a signal including an acknowledgement (ACK) or a negative ACK (NACK) information regarding the encoded data or the re-encoded data from the UE; and
determining a link status between the RN and the UE by using the signal.
4. The method according to claim 3 , further comprising:
transmitting the link status between the RN and the UE to the BS.
5. A relay node (RN) transmitting a re-encoded data to a user equipment (UE), the RN comprising:
a radio frequency (RF) unit; and
a processor configured to control the RF unit,
wherein the processor is configured to:
receive information on a codes and channels condition, that is to be used for forthcoming re-encoding and forthcoming transmitting, from a base station (BS),
receive, from the BS, and decode an encoded data,
re-encode the decoded data in accordance with the codes and channels condition, and
when the decoding is successfully performed in an M-th subframe, transmit the re-encoded data from an M+1-th subframe to the UE in accordance with the codes and channels condition, and
wherein the codes and channels condition indicates that:
the re-encoding and the transmitting are performed by using a plurality of sequential codes and channels which are to be used from the M+1-th subframe by the BS,
the re-encoding and the transmitting are performed by using a code and channel which are used in the M-th subframe by the BS, or
the re-encoding and the transmitting are performed by using a plurality of sequential codes and channels which are used from an initial subframe by the BS.
6. The RN according to claim 5 , wherein the processor is further configured to:
receive a signal including an acknowledgement (ACK) or a negative ACK (NACK) information regarding the encoded data or the re-encoded data from the UE, and
transmit the signal to the BS.
7. The RN according to claim 5 , wherein the processor is further configured to:
receive a signal including an acknowledgement (ACK) or a negative ACK (NACK) information regarding the encoded data or the re-encoded data from the UE, and
determine a link status between the RN and the UE by using the signal.