METHOD AND USER EQUIPMENT FOR RECEIVING DOWNLINK SIGNAL AND METHOD AND BASE STATION FOR TRANSMITTING DOWNLINK SIGNAL

• US 20160353420A1
• Filed: 08/09/2016
• Published: 12/01/2016
• Est. Priority Date: 01/14/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: YOU, Hyangsun, SEO, Dongyoun, YI, Yunjung, AHN, Joonkui, YANG, Suckchel
• Granted Patent: US 10,057,897 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/1858 Transmission or retransmission of more than one copy of acknowledgement message
• CPC Class Codes: H04L 1/189 Transmission or retransmission of more than one copy of a message
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• 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 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present invention provides: a base station for repeatedly transmitting a physical downlink control channel (PDCCH) during a first subframe bundle comprising a plurality of subframes, and transmitting a PDSCH related to the PDCCH; and user equipment for receiving the PDCCH and the PDSCH. The PDSCH can be transmitted to the user equipment starting from subframe n+k, which is the k^th subframe after the last subframe n-1 in the first subframe bundle, wherein k is an integer bigger than 0. The first subframe bundle may begin from a predetermined or fixed position.

Claims

1. A method for receiving, by a user equipment, downlink data, the method comprising:

repeatedly receiving, by the user equipment, a physical downlink control channel (PDCCH) carrying downlink control information across N consecutive subframes, where N is an integer greater than 1; and

repeatedly receiving, by the user equipment, a physical downlink shared channel (PDSCH) carrying the downlink data, across D consecutive subframes starting from a subframe n+k after a subframe n in which the PDCCH is last received, based on the downlink control information,

wherein the downlink control information includes repetition number information for the PDSCH, and D is an integer determined based on the repetition number information, and

wherein k is an integer greater than 0.

2. The method according to claim 1, further comprising:

receiving, by the user equipment, a higher layer signal including information on a maximum number of repetitions for the PDCCH,

wherein N is less than or equal to the maximum number of repetitions for the PDCCH.

3. The method according to claim 1, further comprising:

receiving, by the user equipment, information on a start of the N consecutive subframes.

4. The method according to claim 1, wherein the repeatedly received PDCCHs are received using a same control channel element (CCE) resource within the N consecutive subframes.

5. A method for transmitting, by a base station, downlink data, the method comprising:

repeatedly transmitting, by the base station, a physical downlink control channel (PDCCH) carrying downlink control information across N consecutive subframes, where N is an integer greater than 1; and

repeatedly transmitting, by the base station, a physical downlink shared channel (PDSCH) carrying the downlink data, across D consecutive subframes starting from a subframe n+k after a subframe n in which the PDCCH is last transmitted, based on the downlink control information,

wherein the downlink control information includes repetition number information for the PDSCH, and D is an integer determined based on the repetition number information, and

wherein k is an integer greater than 0.

6. The method according to claim 5, further comprising:

transmitting, by the base station, a higher layer signal including information on a maximum number of repetitions for the PDCCH,

wherein N is less than or equal to the maximum number of repetitions for the PDCCH.

7. The method according to claim 5, further comprising:

transmitting, by the base station, information on a start of the N consecutive subframes.

8. The method according to claim 5, wherein the repeatedly transmitted PDCCHs are transmitted using a same control channel element (CCE) resource within the N consecutive subframes.

9. A user equipment for receiving downlink data, the user equipment comprising:

a radio frequency (RF) unit, and

a processor configured to control the RF unit to;

repeatedly receive a physical downlink control channel (PDCCH) carrying downlink control information across N consecutive subframes, where N is an integer greater than 1; and

repeatedly receive a physical downlink shared channel (PDSCH) carrying the downlink data, across D consecutive subframes starting from a subframe n+k after a subframe n in which the PDCCH is last received, based on the downlink control information,

wherein the downlink control information includes repetition number information for the PDSCH, and D is an integer determined based on the repetition number information, and

wherein k is an integer greater than 0.

10. The user equipment according to claim 9,

wherein the processor is configured to control the RF unit to receive a higher layer signal including information on a maximum number of repetitions for the PDCCH,

wherein N is less than or equal to the maximum number of repetitions for the PDCCH.

11. The user equipment according to claim 9,

wherein the processor is configured to control the RF unit to receive information on a start of the N consecutive subframes.

12. The user equipment according to claim 9,

wherein the repeatedly received PDCCHs are received using a same control channel element (CCE) resource within the N consecutive subframes.

13. A base station for transmitting downlink data, the base station comprising:

a radio frequency (RF) unit, and

a processor configured to control the RF unit to;

repeatedly transmit a physical downlink control channel (PDCCH) carrying downlink control information across N consecutive subframes, where N is an integer greater than 1; and

repeatedly transmit a physical downlink shared channel (PDSCH) carrying the downlink data, across D consecutive subframes starting from a subframe n+k after a subframe n in which the PDCCH is last transmitted, based on the downlink control information,

wherein the downlink control information includes repetition number information for the PDSCH, and D is an integer determined based on the repetition number information, and

wherein k is an integer greater than 0.

14. The base station according to claim 13,

wherein the processor is configured to control the RF unit to transmit a higher layer signal including information on a maximum number of repetitions for the PDCCH,

wherein N is less than or equal to the maximum number of repetitions for the PDCCH.

15. The base station according to claim 13, further comprising:

wherein the processor is configured to control the RF unit to transmit information on a start of the N consecutive subframes.

16. The base station according to claim 13, wherein the repeatedly transmitted PDCCHs are transmitted using a same control channel element (CCE) resource within the N consecutive subframes.