METHOD FOR TRANSMITTING AND RECEIVING UPLINK DATA IN WIRELESS COMMUNICATION SYSTEM AND DEVICE FOR SAME

• US 20180176903A1
• Filed: 12/02/2015
• Published: 06/21/2018
• 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, BYUN, Ilmu
• Granted Patent: US 10,462,769 B2
• Time in Patent Office: 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 performed by a terminal comprises: receiving a first uplink grant from a base station; transmitting, based on 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, the 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, by means of physical uplink control channel (PUCCH) resources.

Claims

1. A method of transmitting and receiving, by a user equipment, uplink (UL) data in a wireless communication system, the method comprising:

receiving a first UL grant from an eNodeB;

transmitting first UL data to the eNodeB based on the first uplink grant;

receiving an HARQ response of the first uplink data from the eNodeB;

transmitting second uplink data to the eNodeB using retransmission resources allocated for retransmission of the first uplink data; and

transmitting control information indicating whether the second uplink data is retransmission data of the first uplink data or new data generated due to a specific event to the eNodeB through physical uplink control channel (PUCCH) resources.

2. The method of claim 1, wherein the PUCCH resources are mapped from a lowest control channel element (CCE) index of a PDCCH in which the first uplink grant is transmitted.

3. The method of claim 1, further comprising:

receiving a second uplink grant from the eNodeB,

wherein the retransmission resources comprise resources allocated by the second uplink grant.

4. The method of claim 3, wherein the PUCCH resources are mapped from a lowest CCE index of a PDCCH in which the second uplink grant is transmitted.

5. The method of claim 3, wherein the second uplink grant is received from the eNodeB along with the HARQ response.

6. The method of claim 1, further comprising:

receiving scheduling request (SR) transmission resources for transmitting SR information from the eNodeB,

wherein the control information is transmitted to the eNodeB through the SR transmission resources.

7. The method of claim 6, wherein:

the SR information has one bit or multiple bits, and

a specific value of the SR information is set to indicate that the second uplink data is retransmission data of the first uplink data or indicate the new data.

8. The method of claim 1, wherein the HARQ response of the first uplink data is HARQ NACK.

9. A method of transmitting and receiving, by an eNodeB, uplink (UL) data in a wireless communication system, the method comprising:

transmitting a first UL grant to a user equipment;

receiving first uplink data from the user equipment;

transmitting an HARQ response of the first uplink data to the user equipment;

receiving second uplink data from the user equipment through retransmission resources allocated to the user equipment for retransmission of the first uplink data; and

receiving control information indicating whether the second uplink data is retransmission data of the first uplink data or new data generated by a specific event from the user equipment through physical uplink control channel (PUCCH) resources.

10. The method of claim 9, further comprising:

determining whether HARQ combining is to be performed between the first uplink data and the second uplink data based on the received control information.

11. The method of claim 10, wherein:

if the second uplink data indicates the retransmission data of the first uplink data, the first uplink data and the second uplink data are HARQ-combined, and

if the second uplink data is the new data, the first uplink data stored in an HARQ buffer is discarded or separately stored.

12. The method of claim 11, further comprising:

transmitting HARQ NACK indicative of a reception failure of the first uplink data to the user equipment if the second uplink data is the new data; and

receiving the retransmission data of the first uplink data from the user equipment.

13. The method of claim 12, further comprising:

transmitting HARQ NACK indicative of a reception failure of the second uplink data to the user equipment if the second uplink data is the new data; and

receiving retransmission data of the second uplink data from the user equipment.

14. The method of claim 12, further comprising:

transmitting a second uplink grant for newly allocating the retransmission resources of the first uplink data to the user equipment; and

receiving the retransmission data of the first uplink data from the user equipment based on the second uplink grant.

15. The method of claim 12, further comprising:

transmitting indication information for providing notification that an HARQ process ID of the first uplink data has been changed to the user equipment.

16. The method of claim 15, wherein the indication information is included in the second uplink grant.

17. The method of claim 9, wherein the PUCCH resources are mapped from a lowest control channel element (CCE) index of a PDCCH in which the first uplink grant is transmitted.

18. The method of claim 9, further comprising:

transmitting a second uplink grant to the user equipment,

wherein the retransmission resources are resources allocated by the second uplink grant, and

the PUCCH resources are mapped from a lowest CCE index of a PDCCH in which the second uplink grant is transmitted.

19. The method of claim 9, further comprising:

transmitting scheduling request (SR) transmission resources for transmitting SR information to the user equipment, wherein the control information is received from the user equipment through the SR transmission resources.

20. A user equipment for transmitting and receiving uplink (UL) data in a wireless communication system, the user equipment comprising:

a radio frequency (RF) module 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 an eNodeB;

transmit first UL data to the eNodeB based on the first uplink grant;

receive an HARQ response of the first uplink data from the eNodeB;

transmit second uplink data to the eNodeB using retransmission resources allocated for retransmission of the first uplink data; and

transmit control information indicating whether the second uplink data is retransmission data of the first uplink data or new data generated due to a specific event to the eNodeB through physical uplink control channel (PUCCH) resources.