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

• US 9,974,057 B2
• Filed: 08/11/2014
• Issued: 05/15/2018
• 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:
  US15/027,347
• Publication Number:
  US 20160249338A1
• Time in Patent Office: 1,373 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;

receiving an offset for the TDD UL-DL configuration;

receiving downlink data;

determining an uplink subframe of the serving cell to transmit a HARQ ACK/NACK with respect to the downlink data according to the TDD UL-DL configuration and the offset; and

transmitting the HARQ ACK/NACK to the serving cell on the determined uplink subframe,

wherein the uplink subframe to transmit the HARQ ACK/NACK varies according to the offset of the UE.

2. The method of claim 1, wherein the TDD UL-DL configuration is received through system information.

3. The method of claim 2, wherein the system information is a system information block (SIB).

4. The method of claim 1, wherein the offset is UE-specific and thus varies depending on a UE.

5. A user equipment (UE) comprising:

a transceiver, and

a processor, coupled to the transceiver, that;

controls the transceiver to receive a time division duplex (TDD) uplink (UL)-downlink (DL) configuration from a serving cell,

controls the transceiver to receive an offset for the TDD UL-DL configuration,

controls the transceiver to receive downlink data;

determines an uplink subframe of the serving cell,

controls the transceiver to transmit a hybrid automatic repeat request (HARQ) acknowledgement (ACK)/non-acknowledgement (NACK) with respect to the downlink data according to the TDD UL-DL configuration and the offset, and

controls the transceiver to transmit the HARQ ACK/NACK to the serving cell on the determined uplink subframe,

wherein the uplink subframe to transmit the HARQ ACK/NACK varies according to the offset of the UE.

6. The UE of claim 5, wherein the TDD UL-DL configuration is received through system information.

7. The UE of claim 6, wherein the system information is a system information block (SIB).

8. The UE of claim 5, wherein the offset is UE-specific and thus varies depending on a UE.