Method for transmitting harq ack/nack from user equipment simultaneously accessing multiple cells

Patent metadata

Field	Value
Publication number	US-2016249338-A1
Application number	US-201415027347-A
Country	US
Kind code	A1
Filing date	Aug 11, 2014
Priority date	Oct 30, 2013
Publication date	Aug 25, 2016
Grant date	—

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.

First claim

What is claimed is:

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 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 an HARQ ACK/NACK with respect to the downlink data received from the at least one secondary cell according to the TDD UL-DL configuration; and transmitting the HARQ ACK/NACK to the primary cell on the determined uplink subframe.

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 , further comprising:
receiving an offset for the TDD UL-DL configuration, wherein in the determination, the uplink subframe to transmit the HARQ ACK/NACK is determined based on the TDD UL-DL configuration and the offset.

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

6 . The method of claim 5 , wherein the uplink subframe to transmit the HARQ ACK/NACK varies depending on a UE according to the offset.

7 . A user equipment (UE) comprising:
a transceiver to receive a time division duplex (TDD) uplink (UL)-downlink (DL) configuration from a frequency division duplex (FDD)-based primary cell and to receive downlink data from at least one secondary cell; and a processor to control the transceiver and to determine an uplink subframe of the primary cell to transmit a hybrid automatic repeat request (HARQ) acknowledgement (ACK)/non-acknowledgement (NACK) with respect to the downlink data received from the at least one secondary cell according to the TDD UL-DL configuration, wherein the processor transmits the HARQ ACK/NACK to the primary cell on the determined uplink subframe through the transceiver.

8 . The UE of claim 7 , wherein the TDD UL-DL configuration is received through system information.

9 . The UE of claim 8 , wherein the system information is a system information block (SIB).

10 . The UE of claim 7 , wherein the transceiver is further configured to:
receive an offset for the TDD UL-DL configuration, wherein in the determination the uplink subframe to transmit the HARQ ACK/NACK is determined based on the TDD UL-DL configuration and the offset.

11 . The UE of claim 10 , wherein the offset is UE-specific and thus varies depending on a UE.

12 . The UE of claim 11 , wherein the uplink subframe to transmit the HARQ ACK/NACK varies depending on a UE according to the offset.

Assignees

• Lg Electronics Inc

Inventors

• Hwang Daesung
• Ahn Joonkui
• Yi Yunjung

Classifications

• H04L1/1671

  the supervisory signal being transmitted together with control information · CPC title

• H04L5/001

  the frequencies being arranged in component carriers · CPC title

• H04L5/1469

  using time-sharing · CPC title

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04L5/0055

  Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861) · CPC title