Method and device for operation of user equipment and base station in wireless communication system

• US 10,680,758 B2
• Filed: 03/16/2018
• Issued: 06/09/2020
• Est. Priority Date: 03/16/2017
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Bae, Duckhyun, Yi, Yunjung, Hwang, Daesung, Seo, Inkwon, Park, Changhwan
• Primary Examiner(s): Adhami, Mohammad S
• Application Number:
  US16/065,718
• Publication Number:
  US 20190393988A1
• Time in Patent Office: 816 Days
• Field of Search: None
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1822 involving configuration of automatic repeat request [ARQ] with parallel processes
• CPC Class Codes: H04L 1/189 Transmission or retransmission of more than one copy of a message
• CPC Class Codes: H04L 1/1893 Physical mapping arrangements physical resource mapping in general H04L5/00
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/1268 of uplink data flows

Abstract

The present invention discloses methods for operating a user equipment and a base station in a wireless communication system and devices for supporting the same. More specifically, the present invention provides various embodiments of methods by which a user equipment transmits an uplink signal to a base station and receives feedback information on the uplink signal in order to transmit and receive signals to and from the base station.

Claims

1. A method of operating by a User Equipment (UE) to communicate with a Base Station (BS) in a wireless communication system, the method comprising:

determining a repetition factor K related to a number of times to perform an uplink transmission on consecutive time-domain resources configured by the BS;

based on uplink transmission without dynamic scheduling configured by the BS, performing repeated uplink transmissions on consecutive time-domain resources within a time period among a plurality of time periods, wherein each time period is associated with a respective Hybrid Automatic Repeat reQuest (HARQ) process identity (ID); and

based on an initial uplink transmission among the repeated uplink transmissions occurring with fewer than K consecutive time-domain resources remaining in the time period, terminating the repeated uplink transmissions at the end of the time period, before K repeated uplink transmissions have been performed,

wherein each time period comprises a plurality of predetermined time-domain resources, and

wherein each of the repeated uplink transmissions is performed on a respective one of the plurality of predetermined time-domain resources.

2. The method of claim 1, further comprising obtaining acknowledgement information for the repeated uplink transmissions.

3. The method of claim 2, wherein the obtaining the acknowledgement information for the repeated uplink transmissions comprises:

based on receiving, from the BS, acknowledgement information corresponding to a HARQ process ID associated with the repeated uplink transmissions, obtaining Non-ACKnowledgement (NACK) for the repeated uplink transmissions; and

based on not receiving, from the BS, the acknowledgement information corresponding to the HARQ process ID associated with the repeated uplink transmissions, obtaining ACKnowledgement (ACK) for the repeated uplink transmissions.

4. The method of claim 3, further comprising, based on receiving the NACK for the repeated uplink transmissions, performing retransmission of the repeated uplink transmissions.

5. The method of claim 2, wherein the acknowledgement information is indicated by combining either or both of information indicating a specific value as resource allocation information for the UE and feedback information using an HARQ process which is not currently used.

6. The method of claim 1, wherein a HARQ process ID associated with the repeated uplink transmissions is determined based on a time-domain resource that the initial uplink transmission is performed.

7. The method of claim 1, wherein a redundancy version for the repeated uplink transmissions is determined based on each transmission occasion for the repeated uplink transmissions.

16. The method of claim 1, wherein the initial uplink transmission occurs after an initial time-domain resource of the time period.

17. The method of claim 1, wherein the plurality of predetermined time-domain resources in each time period are configured by the BS.

8. A method of operating by a Base Station (BS) to communicate with a User Equipment (UE) in a wireless communication system, the method comprising:

based on uplink transmission without dynamic scheduling configured for the UE, receiving, from the UE, repeated uplink transmissions on consecutive time-domain resources within a time period among a plurality of time periods, wherein each time period is associated with a respective Hybrid Automatic Repeat reQuest (HARQ) process identity (ID), and

wherein the reception of the repeated uplink transmissions are performed until the end of the time period, based on an initial uplink transmission among the repeated uplink transmissions occurring with fewer than K consecutive time-domain resources remaining in the time period,

wherein K is a repetition factor related to a number of times to perform an uplink transmission on consecutive time-domain resources configured by the BS,

wherein each time period comprises a plurality of predetermined time-domain resources, and

wherein each of the repeated uplink transmissions occurs on a respective one of the plurality of predetermined time-domain resources.

9. The method of claim 8, further comprising:

based on whether the repeated uplink transmissions are successfully decoded, (i) transmitting acknowledgement information corresponding to the HARQ process ID associated with the repeated uplink transmissions with respect to the UE, or (ii) dropping a transmission of the acknowledgement information.

10. The method of claim 9, wherein the acknowledgement information corresponds to Non-ACKnowledgement (NACK) for the repeated uplink transmissions.

11. The method of claim 9, further comprising, based on the BS transmitting the acknowledgement information, receiving, from the UE, a signal that is retransmitted for the repeated uplink transmissions.

12. The method of claim 8, further comprising:

transmitting, to the UE, acknowledgement information corresponding to the HARQ process ID based whether the repeated uplink transmissions are successfully decoded,

wherein the acknowledgement information is indicated by at least one of (i) information indicating a specific value as resource allocation information for the UE, or (ii) feedback information using an HARQ process which is not currently used.

13. The method of claim 8, wherein the HARQ process ID associated with the repeated uplink transmissions is determined based on a time-domain resource that the UE performs the initial uplink transmission.

14. The method of claim 8, wherein a time-domain resource that the initial uplink transmission is performed is determined based on a specific resource index of the time period.

18. The method of claim 8, wherein the plurality of predetermined time-domain resources in each time period are configured by the BS.

15. A communication device configured to transmit and receive signals to and from a Base Station (BS) in a wireless communication system, the communication device comprising:

at least one processor; and

at least one memory operably coupled with the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising;

determining a repetition factor K related to a number of times to perform an uplink transmission on consecutive time-domain resources configured by the BS;

based on uplink transmission without dynamic scheduling configured by the BS, performing repeated uplink transmissions on consecutive time-domain resources within a time period among a plurality of time periods, wherein each time period is associated with a respective Hybrid Automatic Repeat reQuest (HARQ) process identity (ID); and

based on an initial uplink transmission among the repeated uplink transmissions occurring with fewer than K consecutive time-domain resources remaining in the time period, terminating the repeated uplink transmissions at the end of the time period, before K repeated uplink transmissions have been performed,

wherein each time period comprises a plurality of predetermined time-domain resources, and wherein each of the repeated uplink transmissions is performed on a respective one of the plurality of predetermined time-domain resources.

19. The communication device of claim 15, wherein the plurality of predetermined time-domain resources in each time period are configured by the BS.