Method for transmitting HARQ ACK/NACK from user equipment simultaneously accessing multiple cells

• US 10,575,282 B2
• Filed: 04/17/2018
• Issued: 02/25/2020
• Est. Priority Date: 10/30/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Hwang, Daesung, Ahn, Joonkui, Yi, Yunjung
• Primary Examiner(s): Holland, Jenee
• Application Number:
  US15/955,365
• Publication Number:
  US 20180242301A1
• Time in Patent Office: 679 Days
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1822 involving configuration of automatic repeat request [ARQ] with parallel processes
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• 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 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

One disclosure of the present specification provides a user equipment method. The method comprises the steps of: receiving a time division duplex (TDD) uplink (UL)-downlink (DL) configuration from a frequency division duplex (FDD)-based primary cell; receiving downlink data from at least one secondary cell; determining an uplink subframe of the primary cell to transmit a hybrid automatic repeat request (HARQ) acknowledgement (ACK)/negative-acknowledgement (NACK) for the received downlink data, which is transmitted from the at least one secondary cell, according to the TDD UL-DL configuration; and transmitting the HARQ ACK/NACK from the determined uplink subframe to the primary cell.

Claims

1. A method for transmitting a hybrid automatic repeat request (HARQ) acknowledgement (ACK)/non-acknowledgement (NACK), the method performed by a user equipment (UE) and comprising:

receiving a time division duplex (TDD) uplink (UL)-downlink (DL) configuration from a serving cell, which is a frequency division duplex (FDD) based cell;

receiving an offset related to the TDD UL-DL configuration; and

applying the TDD UL-DL configuration and the offset;

wherein the TDD UL-DL configuration and the offset are applied to determine an uplink subframe of the serving cell, for transmitting the HARQ ACK/NACK,

wherein the uplink subframe of the serving cell is a subframe based on the FDD,

wherein the TDD UL-DL configuration received by the UE and a second TDD UL-DL configuration received by a second UE from a same serving cell are the same configuration, and wherein the offset and a second offset received by the second UE are different offsets.

2. The method of claim 1, wherein the offset is received through a higher layer signal.

3. The method of claim 1, wherein the subframe based on the FDD is configured as the uplink subframe based on the TDD UL-DL configuration.

4. A user equipment (UE) comprising:

a transceiver, and

a processor, operatively coupled to the transceiver, wherein the processor is configured to;

receive, via the transceiver, a time division duplex (TDD) uplink (UL)-downlink (DL) configuration from a serving cell, which is a frequency division duplex (FDD) based cell;

receive, via the transceiver, an offset related to the TDD UL-DL configuration; and

apply the TDD UL-DL configuration and the offset;

wherein the TDD UL-DL configuration and the offset are applied to determine an uplink subframe of the serving cell for transmitting the HARQ ACK/NACK,

wherein the uplink subframe of the serving cell is a subframe based on the FDD,

wherein the TDD UL-DL configuration received by the UE and a second TDD UL-DL configuration received by a second UE from a same serving cell are the same configuration, and wherein the offset and a second offset received by the second UE are different offsets.

5. The UE of claim 4, wherein the offset is received through a higher layer signal.

6. The UE of claim 4, wherein the subframe based on the FDD is configured as the uplink subframe based on the TDD UL-DL configuration.

7. A method for receiving a hybrid automatic repeat request (HARQ) acknowledgement (ACK)/non-acknowledgement (NACK), the method performed by a serving cell and comprising:

transmitting, to a user equipment (UE), a time division duplex (TDD) uplink (UL)-downlink (DL) configuration, wherein the serving cell is configured as a frequency division duplex (FDD) based cell;

transmitting, to the UE, an offset related to the TDD UL-DL configuration; and

receiving, from the UE, the HARQ ACK/NACK in an uplink subframe determined based on the TDD UL-DL configuration and the offset, wherein the uplink subframe is a subframe based on the FDD,

transmitting, to a second UE, a second TDD UL-DL configuration, wherein the TDD UL-DL configuration transmitted to the UE and the second TDD UL-DL configuration are the same configuration; and

transmitting, to the second UE, a second offset, wherein the offset transmitted to the UE and the second offset are different offsets.

8. The method of claim 7, wherein the offset is transmitted through a higher layer signal.

9. The method of claim 7, wherein the subframe based on the FDD is configured as the uplink subframe based on the TDD UL-DL configuration.

10. A serving cell configured as a frequency division duplex (FDD) based cell, and configured to receive a hybrid automatic repeat request (HARQ) acknowledgement (ACK)/non-acknowledgement (NACK), the serving cell comprising:

a transmitter and a receiver; and

a processor operatively coupled to the transmitter and receiver, wherein the processor is configured to;

transmit, to a user equipment (UE), via the transmitter, a time division duplex (TDD) uplink (UL)-downlink (DL) configuration;

transmit, to the UE, via the transmitter, an offset related to the TDD UL-DL configuration; and

receive, from the UE, via the receiver, the HARQ ACK/NACK in an uplink subframe determined based on the TDD UL-DL configuration and the offset, wherein the uplink subframe is a subframe based on the FDD,

transmit, to a second UE, a second TDD UL-DL configuration, wherein the TDD UL-DL configuration transmitted to the UE and the second TDD UL-DL configuration are the same configuration; and

transmit, to the second UE, a second offset, wherein the offset transmitted to the UE and the second offset are different offsets.

11. The serving cell of claim 10, wherein the processor is further configured to:

transmit the offset through a higher layer signal via the transmitter.

12. The serving cell of claim 10, wherein the subframe based on the FDD is configured as the uplink subframe based on the TDD UL-DL configuration.