Method and apparatus for transmitting uplink data in a wireless communication system
Provided are a method and apparatus for transmitting uplink data. Particularly, a method for transmitting uplink data in a wireless communication system, the method includes transmitting, by a user equipment, a scheduling request to a base station, and transmitting, by the user equipment, uplink data through a contention-based physical uplink shared channel (PUSCH) resource block that can transmit the uplink data without a uplink grant of the base station, wherein the scheduling request and the contention-based PUSCH resource block may be transmitted in an identical subframe.
1. A method for transmitting uplink data in a wireless communication system, the method comprising:
receiving, by a user equipment, configuration information of a contention-based radio resource from a base station,
wherein the configuration information includes uplink resource information in which a contention-based physical uplink shared channel (PUSCH) zone (CP zone) is configured,
wherein the CP zone is a resource region in which one or more contention-based PUSCH resource blocks allocated within a subframe are available, and
wherein the CP zone is independently configured for each uplink transmission procedure and set to a same pattern in at least one subframe;
transmitting, by the user equipment, a scheduling request including information indicating a service characteristic of uplink data; and
transmitting, by the user equipment, the uplink data on a contention-based PUSCH resource block that can transmit the uplink data without an uplink grant of the base station,
wherein an uplink signal related to the uplink data and the uplink data are transmitted in an identical subframe.
2. The method of claim 1 , wherein the contention-based PUSCH resource block in the CP zone is determined based on a physical uplink control channel (PUCCH) resource index in which the scheduling request is transmitted.
3. The method of claim 2 ,
wherein the service characteristic of the uplink data includes aperiodic short data, data generated by an application which is sensitive to delay, data that does not require resource allocation for buffer status report (BSR) transmission, or data that requires resource allocation for BSR transmission.
4. The method of claim 1 , further comprising receiving, by the user equipment, a hybrid automatic repeat request (HARQ) or automatic repeat request (ARQ) acknowledgement (ACK) information, if the uplink data are successfully received by the base station.
5. The method of claim 1 , further comprising receiving, by the user equipment, an uplink grant for retransmitting the uplink data from the base station, if the uplink data are not successfully received by the base station.
6. The method of claim 1 , further comprising receiving, by the user equipment, an uplink grant for transmitting next uplink data of the uplink data and for a buffer status report, if the uplink data are successfully received by the base station.
7. The method of claim 6 , further comprising receiving, by the user equipment, a hybrid automatic repeat request (HARQ) or automatic repeat request (ARQ) acknowledgement (ACK) information, if the uplink data are successfully received by the base station.
8. The method of claim 1 , further comprising receiving, by the user equipment, an uplink grant for retransmitting the uplink data and for a buffer status report, if the uplink data are not successfully received by the base station.
9. The method of claim 8 , wherein the uplink grant for retransmitting the uplink data and for a buffer status report includes a retransmission indicator for retransmitting the uplink data.
10. The method of claim 8 , further comprising receiving, by the user equipment, a hybrid automatic repeat request (HARQ) or automatic repeat request (ARQ) non-acknowledgement (NACK) information, if the uplink data are not successfully received by the base station.
11. A user equipment for transmitting uplink data in a wireless communication system, comprising:
a radio frequency (RF) unit for transmitting and receiving a radio signal; and
a processor,
wherein the processor is configured to perform:
receiving configuration information of a contention-based radio resource from a base station,
wherein the configuration information includes uplink resource information in which a contention-based physical uplink shared channel (PUSCH) zone (CP zone) is configured,
wherein the CP zone is a resource region in which one or more contention-based PUSCH resource blocks allocated within a subframe are available, and
wherein the CP zone is independently configured for each uplink transmission procedure and set to a same pattern in at least one subframe;
transmitting, by the user equipment, a scheduling request including information indicating a service characteristic of uplink data; and
transmitting the uplink data on a contention-based PUSCH resource block that can transmit the uplink data without an uplink grant of the base station,
wherein an uplink signal related to the uplink data and the uplink data are transmitted in an identical subframe.
12. The method of claim 1 , wherein a maximum resource block size per user equipment, a modulation and coding scheme (MCS) level and an initial transmission power reference are independently configured for each CP zone.
13. The method of claim 1 , wherein the uplink transmission procedure includes a random access procedure or an uplink transmission procedure other than the random access procedure.
14. The method of claim 13 , wherein, when the uplink transmission procedure includes the random access procedure, the uplink signal is a random access preamble.
15. The method of claim 13 , wherein, when the uplink transmission procedure includes the uplink transmission procedure other than the random access procedure, the uplink signal is a scheduling request.