Method And User Equipment For Receiving Donwlink Signal, Method And Base Station For Transmitting Downlink Signal

• US 20190098608A1
• Filed: 06/19/2017
• Published: 03/28/2019
• Est. Priority Date: 06/17/2016
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: YI, Yunjung, YOU, Hyangsun, KIM, Kijun, LEE, Hyunho
• Granted Patent: US 10,805,913 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 27/26 Systems using multi-frequency codes H04L27/32 takes precedence
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/26025 Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking allocating sub-channels of the transmission path H04L5/003
• CPC Class Codes: H04L 27/2603 Signal structure ensuring backward compatibility with legacy system
• CPC Class Codes: H04L 5/00 Arrangements affording multiple use of the transmission path
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04L 5/0096 Indication of changes in allocation
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A user equipment is provided with puncturing information indicating a resource to which downlink data is punctured among time-frequency resources to which the downlink data is allocated. The user equipment may decode the downlink data received in the time-frequency resource on the basis of the puncturing information. The downlink data may be mapped to the time-frequency resource by a combined method of a time-first resource mapping method and a frequency-first resource mapping method, or by a distributed resource mapping method.

Claims

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

receiving the downlink data in a first time interval;

receiving downlink control information in a second time interval; and

decoding the downlink data based on the downlink control information,

wherein the first time interval includes multiple orthogonal frequency division multiplexing (OFDM) symbols in a time domain, and

wherein the downlink control information includes information on one or more OFDM symbols, in which the downlink data is not present, among the multiple OFDM symbols belonging to the first time interval preceding the second time interval in the time domain.

2. The method according to claim 1,

wherein the multiple OFDM symbols in the first time interval are divided into a plurality of OFDM symbol groups in the time domain, and

wherein the information on the one or more OFDM symbols in which the downlink is not present includes a bitmap having a plurality of bits,

wherein the plurality of bits are corresponding to the plurality of OFDM symbols groups, respectively, and

wherein each of the plurality of bits indicates whether the downlink data is present in a corresponding OFDM symbol group.

3. The method according to claim 1,

wherein the downlink control information is received through a physical downlink control channel on a common search space in the second time interval.

5. The method according to claim 1,

wherein the one or more OFDM symbols in which the downlink data is not present include a time-frequency resource punctured by latency-critical data.

11. The method according to claim 1,

wherein the downlink data is received on a time-frequency resource in the first time interval based on a combination resource mapping scheme or a distributed resource mapping scheme,

wherein the combination resource mapping scheme maps the downlink data by a time-first frequency-second mapping scheme in each of X time regions included in the time-frequency resource, where X is an integer greater than 1, and

wherein the distributed resource mapping scheme maps the downlink data in a diagonal direction in the time-frequency resource.

4. (canceled)

6. (canceled)

7. (canceled)

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

a transceiver, and

a processor configured to control the transceiver, the processor configured to;

control the transceiver to receive the downlink data in a first time interval;

control the transceiver to receive downlink control information in a second time interval; and

decode the downlink data based on the downlink control information,

wherein the first time interval includes multiple orthogonal frequency division multiplexing (OFDM) symbols in a time domain, and

wherein the downlink control information includes information on one or more OFDM symbols, in which the downlink data is not present, among the multiple OFDM symbols belonging to the first time interval preceding the second time interval in the time domain.

20. The user equipment according to claim 8,

wherein the multiple OFDM symbols in the first time interval are divided into a plurality of OFDM symbol groups in the time domain, and

wherein the information on the one or more OFDM symbols in which the downlink data is not present includes a bitmap having a plurality of bits,

wherein the plurality of bits are corresponding to the plurality of OFDM symbols groups, respectively, and

wherein each of the plurality of bits indicates whether the downlink data is present in a corresponding OFDM symbol group.

21. The user equipment according to claim 8,

wherein the downlink control information is received through a physical downlink control channel on a common search space in the second time interval.

22. The user equipment according to claim 8,

wherein the one or more OFDM symbols in which the downlink data is not present include a time-frequency resource punctured by latency-critical data.

9. (canceled)

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

a transceiver, and

a processor configured to control the transceiver, the processor configured to;

control the transceiver to transmit first downlink data in a first time interval to a user equipment;

control the transceiver to transmit second downlink data by puncturing a part of a time-frequency resource allocated to the first downlink data; and

control the transceiver to transmit downlink control information in a second time interval to the user equipment

wherein the first time interval includes multiple orthogonal frequency division multiplexing (OFDM) symbols in a time domain, and

wherein the downlink control information includes information on one or more OFDM symbols, in which the first downlink data is not present, among the multiple OFDM symbols belonging to the first time interval preceding the second time interval in the time domain.

23. The base station according to claim 10,

wherein the multiple OFDM symbols in the first time interval are divided into a plurality of OFDM symbol groups in the time domain, and

wherein the information on the one or more OFDM symbols in which the first downlink data is not present includes a bitmap having a plurality of bits,

wherein the plurality of bits are corresponding to the plurality of OFDM symbols groups, respectively, and

wherein each of the plurality of bits indicates whether the first downlink data is present in a corresponding OFDM symbol group.

24. The base station according to claim 10,

wherein the downlink control information is transmitted through a physical downlink control channel on a common search space in the second time interval.

25. The base station according to claim 10,

wherein the one or more OFDM symbols in which the first downlink data is not present include the part of the time-frequency resource, and

wherein the second downlink data is latency-critical data.

26. The base station according to claim 10,

wherein the processor is configured to map the first downlink data to the time-frequency resource allocated to the user equipment,

wherein the first downlink data is mapped to the time-frequency resource based on a combination resource mapping scheme or a distributed resource mapping scheme,

wherein the combination resource mapping scheme maps the first downlink data by a time-first frequency-second mapping scheme in each of X time regions included in the time-frequency resource, where X is an integer greater than 1, and

wherein the distributed resource mapping scheme maps the first downlink data in a diagonal direction in the time-frequency resource.

12-19. -19. (canceled)