Uplink data transmission method in wireless communication system and apparatus for the same
A method for transmitting uplink (UL) data requiring low latency in a wireless communication system according to the present invention, the method performed by a user equipment comprises transmitting contention PUSCH resource block (CPRB) indication information used for identifying a particular UE and/or particular data to an eNB; transmitting UL data to the eNB through CPRB resources of a contention based PUSCH (CP) zone; and receiving a hybrid automatic retransmit request (HARQ) response with respect to the UL data from the eNB through a physical hybrid ARQ indicator channel (PHICH).
1. A method for transmitting, by a user equipment (UE), uplink (UL) data in a wireless communication system, the method comprising:
transmitting, to an evolved Node B (eNB), contention physical uplink shared channel (PUSCH) resource block (CPRB) indication information used for identifying the UL data;
transmitting, to the eNB, the UL data through one or more CPRB resources of a contention based PUSCH (CP) zone; and
receiving, from the eNB, a hybrid automatic retransmit request (HARQ) response with respect to the UL data through a physical hybrid ARQ indicator channel (PHICH),
wherein the CP zone is a resource area from which UL data is transmitted without allocation of an UL grant,
wherein the UL data transmitted by the UE is identified by a specific cyclic shift (CS), and
wherein the specific CS is determined by using a value of the CPRB indication information, a CPRB index and a total number of CPRBs included in the CP zone.
2. The method of claim 1 , wherein the CPRB indication information is a signal transmitted through a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH).
3. The method of claim 1 , wherein a value of the specific CS is determined through the following equation:
CS
value
=
[
CPRB
indication
information
value
-
CPRB
index
A
total
number
of
CPRBs
(
N
)
]
.
4. The method of claim 1 , wherein the CPRB index is given by a remainder of the value of CPRB indication information divided by the total number of CPRBs (N).
5. The method of claim 4 , wherein the value of the specific CS ranges from 0 to <(the maximum value of the CPRB indication information value+1)/N>−1 for the same CPRB.
6. The method of claim 1 , wherein the PHICH is assigned for each UE according to the specific CS.
7. The method of claim 1 , wherein the CPRB indication information and the UL data are transmitted from the same subframe or through consecutive subframes.
8. A method for receiving, by an evolved Node B (eNB), uplink (UL) data in a wireless communication system, the method comprising:
receiving, from at least two or more user equipments (UE), contention physical uplink shared channel (PUSCH) resource block (CPRB) indication information used for identifying UL data;
receiving, from the at least two or more UEs, UL data through CPRB resource of a contention based PUSCH (CP) zone; and
transmitting, to the at least two or more UEs, a hybrid automatic retransmit request (HARQ) response with respect to the UL data through a physical hybrid ARQ indicator channel (PHICH),
wherein the CP zone is a resource area from which UL data is transmitted without allocation of an UL grant,
wherein the UL data transmitted by the UE is identified by a specific cyclic shift (CS), and
wherein the specific CS is determined by using a value of the CPRB indication information, a CPRB index and a total number of CPRBs included in the CP zone.
9. A user equipment for transmitting uplink (UL) 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 controlled:
to transmit, to an evolved Node B (eNB) contention physical uplink shared channel (PUSCH) resource block (CPRB) indication information used for identifying the UL data;
to transmit, to the eNB, UL data through one or more CPRB resources of a contention based PUSCH (CP) zone; and
to receive, from the eNB, a hybrid automatic retransmit request (HARQ) response with respect to the UL data through a physical hybrid ARQ indicator channel (PHICH); and
wherein the CP zone is a resource area from which UL data is transmitted without allocation of an UL grant
wherein the UL data transmitted by the UE is identified by a specific cyclic shift (CS), and
wherein the specific CS is determined by using a value of the CPRB indication information, a CPRB index and a total number of CPRBs included in the CP zone.