Communication method using carrier aggregation and device for same

• US 10,447,460 B2
• Filed: 09/25/2015
• Issued: 10/15/2019
• Est. Priority Date: 09/27/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Seungmin, Yang, Suckchel
• Primary Examiner(s): Yao, Kwang B
• Assistant Examiner(s): Ngo, Nguyen H
• Application Number:
  US15/510,165
• Publication Number:
  US 20170310452A1
• Time in Patent Office: 1,481 Days
• Field of Search: 370230, 370236, 370252, 370280, 370281, 370328, 370329, 370330
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• 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 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks

Abstract

The present invention relates to a method for transmitting and receiving a signal by a terminal in a wireless communication system supporting carrier aggregation. A method for transmitting and receiving a signal by a terminal can comprise the steps of: receiving configuration information about component carrier aggregation; on the basis of the configuration information, configuring a primary component carrier in a licensed band and configuring a secondary component carrier in an unlicensed band; transmitting data in a first subframe of the secondary component carrier; and receiving in a second subframe a response to the data. If the primary component carrier in the licensed band is configured as a component carrier on a TDD mode, the second subframe can be configured on the basis of a HARQ-ACK timing in a first condition.

Claims

1. A method for transmitting and receiving signals by a user equipment in a wireless communication system supporting carrier aggregation, the method comprising:

receiving configuration information on component carrier aggregation;

configuring a primary component carrier for a time division duplex (TDD) mode in a licensed band and a secondary component carrier in an unlicensed band, based on the configuration information;

receiving control information for scheduling a plurality of downlink subframes on a time duration occupied for communication in the unlicensed band;

receiving downlink data in the plurality of downlink subframes scheduled based on the control information,

wherein the plurality of downlink subframes are scheduled based on multi-subframe scheduling, and

wherein a number and locations of the plurality of downlink subframes are configured based on TDD uplink-downlink configuration information of the primary component carrier; and

transmitting a response to the downlink data in a subframe of the primary component carrier,

wherein the response is transmitted at a hybrid automatic repeat and request acknowledgement/negative acknowledgement (HARQ-ACK) timing configured based on the TDD uplink-downlink configuration information of the primary component carrier, and

wherein the HARQ-ACK timing is a same timing at which a response is transmitted after downlink data is transmitted on a frequency division duplex (FDD) secondary component carrier operating based on cross-carrier scheduling when a TDD primary component carrier and the FDD secondary component carrier are aggregated in the licensed band.

2. The method according to claim 1, wherein the unlicensed band is a frequency band in which an exclusive right to use is not guaranteed.

3. The method according to claim 1, wherein the plurality of downlink subframes are scheduled within downlink subframes in a bundling window.

4. The method according to claim 3, wherein a response to downlink data received in each of the plurality of downlink subframes is transmitted at a same uplink subframe timing.

5. A user equipment for transmitting and receiving signals in a wireless communication system supporting carrier aggregation, the user equipment comprising:

a transceiver configured to transmit and receive a signal; and

a processor configured to control the transceiver,

wherein the processor is further configured to;

control the transceiver to receive configuration information on component carrier aggregation;

configure a primary component carrier for a time division duplex (TDD) mode in a licensed band and a secondary component carrier in an unlicensed band, based on the configuration information;

control the transceiver to receive control information for scheduling a plurality of downlink subframes on a time duration occupied for communication in the unlicensed band;

control the transceiver to receive downlink data in the plurality of downlink subframes scheduled based on the control information,

wherein the plurality of downlink subframes are scheduled based on multi-subframe scheduling, and

wherein a number and locations of the plurality of downlink subframes are configured based on TDD uplink-downlink configuration information of the primary component carrier; and

control the transceiver to transmit a response to the downlink data in a subframe of the primary component carrier,

wherein the response is transmitted at a hybrid automatic repeat and request acknowledgement/negative acknowledgement (HARQ-ACK) timing configured based on the TDD uplink-downlink configuration information of the primary component carrier, and

wherein the HARQ-ACK timing is a same timing at which a response is transmitted after downlink data is transmitted on a frequency division duplex (FDD) secondary component carrier operating based on cross-carrier scheduling when a TDD primary component carrier and the FDD secondary component carrier are aggregated in the licensed band.