Method and apparatus for transceiving a downlink HARQ in a wireless communication system
The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transceiving a downlink hybrid automatic repeat (HARQ). According to one embodiment of the present invention, a method for setting an HARQ process by a terminal in a wireless communication system may comprise the steps of: receiving, from a base station, limited-resource information indicating a resource the use of which for downlink transmission to the terminal is limited; determining an HARQ process to be activated on the basis of the limited-source information; and performing an HARQ operation for the downlink transmission by means of the HARQ process to be activated.
1. A method for configuring a hybrid automatic repeat request (HARQ) process by a user equipment (UE) in a wireless communication system, the method comprising:
receiving, from a base station (BS), resource limitation information indicating resources the use of which is limited to downlink (DL) transmission toward the UE and indicating that data is to be received from multiple cells using a same frequency and same time resources;
activating a HARQ process of a plurality of HARQ processes based on the resource limitation information; and
performing an HARQ operation for the downlink transmission through the activated HARQ process,
wherein the activating comprises activating only one HARQ process of the plurality of HARQ processes and allocating only one HARQ buffer of a plurality of HARQ buffers to the only one activated HARQ process.
2. The method according to claim 1 , wherein the resource limitation information is information regarding a subframe in which transmission (Tx) power is coordinated for inter-cell interference (ICI) coordination by a serving cell of the UE.
3. The method according to claim 2 , wherein the subframe in which transmission (Tx) power is coordinated is an Almost Blank Subframe (ABS).
4. The method according to claim 1 , wherein the resource limitation information is information regarding a subframe in which band swapping is performed.
5. The method according to claim 1 , wherein the plurality of HARQ buffers comprise equal-sized buffers.
6. The method according to claim 1 , wherein the plurality of HARQ buffers comprise unequal-sized buffers.
7. The method according to claim 1 , wherein a capacity of the only one allocated HARQ buffer is determined based on a transmission (Tx) power or a transfer rate of resources associated with the only one HARQ process.
8. The method according to claim 1 , wherein the HARQ process to be activated based on the resource limitation information is initially deactivated.
9. The method according to claim 1 , wherein the resource limitation information further includes at least one of information for identifying the HARQ process to be activated, information regarding a number of the HARQ process to be activated, or a buffer capacity allocated to the HARQ process to be activated.
10. A user equipment (UE) for configuring a hybrid automatic repeat request (HARQ) process in a wireless communication system, comprising:
a transmitter configured to transmit an uplink signal to a base station (B S);
a receiver configured to receive a downlink signal from the base station (BS); and
a processor configured to control the UE including the transmitter and the receiver,
wherein the processor is further configured to:
receive, from the base station (BS), resource limitation information indicating resources the use of which is limited to downlink (DL) transmission toward the UE and indicating that data is to be received from multiple cells using a same frequency and same time resources, activate a HARQ process of a plurality of HARQ processes based on the resource limitation information, and
perform an HARQ operation for the downlink transmission through the HARQ process.
wherein only one HARQ process of the plurality of HARQ processes is activated and only one HARQ buffer of a plurality of HARQ buffers is allocated to the only one activated HARQ process.