Method for transmitting and receiving uplink data in wireless communication system and device for same

• US 10,492,174 B2
• Filed: 12/02/2015
• Issued: 11/26/2019
• Est. Priority Date: 07/02/2015
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Eunjong, Cho, Heejeong, Hahn, Genebeck, Kim, Kitae, Byun, Ilmu
• Primary Examiner(s): Nguyen, Brian D
• Application Number:
  US15/741,499
• Publication Number:
  US 20180192398A1
• Time in Patent Office: 1,455 Days
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 1/1893 Physical mapping arrangements physical resource mapping in general H04L5/00
• CPC Class Codes: H04L 5/00 Arrangements affording multiple use of the transmission path
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present description provides a method for transmitting and receiving uplink (UL) data in a wireless communication system. A method, which is carried out by means of a terminal, comprises the steps of: receiving a first uplink grant from a base station; transmitting, on the basis of the first uplink grant, first uplink data to the base station; receiving an HARQ response to the first uplink data from the base station; transmitting second uplink data to the base station by means of retransmission resources allocated for the retransmission of the first uplink data; and transmitting, to the base station, control information which indicates whether the second uplink data is retransmission data of the first uplink data or new data generated by means of a particular event.

Claims

1. A method for transmitting, by a user equipment (UE), an uplink (UL) data in a wireless communication system, the method comprising:

receiving a first UL grant from a base station (BS);

transmitting, to the BS, a first UL data based on the first UL grant;

receiving a hybrid automatic repeat request (HARQ) response of the first UL data from the BS; and

transmitting, to the BS, a second UL data and control information for whether the second UL data is a retransmission data of the first UL data or a new data,

wherein the second UL data and the control information are multiplexed on a physical uplink shared channel (PUSCH) resource,

wherein the control information relates to a type of a cyclic redundancy check (CRC),

wherein, when the second UL data is the retransmission data of the first UL data, the control information relates to a first CRC type, and

wherein, when the second UL data is the new data, the control information relates to a second CRC type.

2. The method of claim 1, when the second UL data is the retransmission data of the first UL data the method further comprises:

receiving a second UL grant from the BS; and

transmitting, to the BS, the second UL data based on the received second UL grant,

wherein the second UL grant is received from the BS together with the HARQ response.

3. The method of claim 1, wherein the type of CRC is determined depending on whether a transport block (TB) of the retransmission data or the new data is segmented.

4. The method of claim 1,

wherein the control information is mapped to a specific resource element (RE) of the PUSCH resource, and

wherein a resource of the second UL data and a resource of the control information are not overlapped.

5. The method of claim 4, wherein the control information is mapped to at least one symbol of a lowest subcarrier index of the PUSCH resource or mapped to at least one symbol of a center subcarrier index of the PUSCH resource.

6. The method of claim 1, further comprising:

receiving a downlink (DL) data from the BS; and

transmitting a HARQ response of the received DL data to the BS,

wherein the control information is transmitted with being multiplexed with the HARQ response of the received DL data.

7. The method of claim 6, wherein the control information and the HARQ response of the received DL data are distinguished by an orthogonal sequence.

8. The method of claim 1, wherein the control information is a new data indicator (NDI).

9. A method for receiving, by a base station (BS), an uplink (UL) data in a wireless communication system, the method comprising:

transmitting a first UL grant to a user equipment (UE);

receiving a first UL data from the UE;

transmitting, to the UE, a hybrid automatic repeat request (HARQ) response of the first UL data; and

receiving, from the UE, a second UL data and control information for whether the second UL data is a retransmission data of the first UL data or a new data,

wherein the second UL data and the control information are multiplexed on a physical uplink shared channel (PUSCH) resource,

wherein the control information relates to a type of a cyclic redundancy check (CRC),

wherein, when the second UL data is the retransmission data of the first UL data, the control information relates to a first CRC type, and

wherein, when the second UL data is the new data, the control information relates to a second CRC type.

10. The method of claim 9, further comprising:

determining to perform HARQ combining between the first UL data and the second UL data based on the received control information.

11. The method of claim 10,

wherein when the second UL data indicates the retransmission data of the first UL data, the first UL data and the second UL data are HARQ combined, and

wherein when the second UL data indicates the new data, the first UL data stored in a HARQ buffer is discarded or separately stored.

12. The method of claim 11, wherein when the second UL data is the new data, the method further comprises:

transmitting, to the UE, a HARQ NACK for a reception failure of the first UL data; and

receiving, from the UE, the retransmission data of the first UL data.

13. The method of claim 12, further comprising:

transmitting, to the UE, a second UL grant for newly allocating a retransmission resource of the first UL data; and

receiving, from the UE, the retransmission data of the first UL data based on the second UL grant.

14. The method of claim 12, further comprising:

transmitting, to the UE, indication information indicating that a HARQ process identifier (ID) of the first UL data is changed.

15. The method of claim 11, wherein when the second UL data is the new data, the method further comprises:

transmitting, to the UE, a HARQ NACK for a reception failure of the first UL data; and

receiving, from the UE, the retransmission data of the second UL data.

16. A user equipment (UE) for transmitting an uplink (UL) data in a wireless communication system, the UE comprising:

a radio frequency (RF) module including a transceiver for transmitting and receiving a radio signal; and

a processor functionally connected to the RF module,

wherein the processor is configured to;

receive a first UL grant from a base station (BS);

transmit, to the BS, a first UL data based on the first UL grant;

receive a hybrid automatic repeat request (HARQ) response of the first UL data from the BS; and

transmit, to the BS, a second UL data and

control information for whether the second UL data is a retransmission data of the first UL data or a new data,

wherein the second UL data and the control information are multiplexed on a physical uplink shared channel (PUSCH) resource,

wherein the control information relates to a type of a cyclic redundancy check (CRC),

wherein, when the second UL data is the retransmission data of the first UL data, the control information relates to a first CRC type, and

wherein, when the second UL data is the new data, the control information relates to a second CRC type.