Method for receiving downlink data in a wireless communication system supporting 256 QAM, and terminal therefor

• US 9,923,753 B2
• Filed: 02/27/2015
• Issued: 03/20/2018
• Est. Priority Date: 03/07/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Hwang, Daesung, Yi, Yunjung, Kim, Kijun, Ahn, Joonkui
• Primary Examiner(s): Sobutka, Philip
• Application Number:
  US15/120,731
• Publication Number:
  US 20160366007A1
• Time in Patent Office: 1,117 Days
• Field of Search: 455522
• CPC Class Codes: H04L 1/00 Arrangements for detecting or preventing errors in the information received correcting synchronisation H04L7/00
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 27/0008 arrangements for allowing a transmitter or receiver to use more than one type of modulation negotiating modulation type for two-way transmission paths H04L5/1453
• CPC Class Codes: H04L 27/3809 Amplitude regulation arrangements
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 52/143 Downlink power control
• CPC Class Codes: H04W 52/34 TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
• CPC Class Codes: H04W 52/36 with a discrete range or set of values, e.g. step size, ramping or offsets
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

One disclosure of the present application provides a method for receiving downlink data in a wireless communication system supporting 256 QAM. The method for receiving downlink data in a wireless communication system supporting 256 QAM comprises the steps of: receiving setting information for power back-off; receiving downlink data transmitted on the basis of the setting information for power back-off; and demodulating the downlink data received on the basis of the setting information for power back-off, wherein the setting information for power back-off is information related to at least one of whether to apply the power back-off, a reduced amount of power of the downlink data by the power back-off, a frame index to which the power back-off is applied, a subframe index and a resource to which the power back-off is applied.

Claims

1. A method for receiving downlink data in a wireless communication system supporting 256 QAM, the method comprising:

receiving configuration information for power back-off;

receiving downlink control information (DCI) through a downlink control channel;

receiving the downlink data transmitted based on the configuration information for the power back-off and the DCI; and

demodulating the received downlink data based on the configuration information for the power back-off and the DCI,

wherein the configuration information for the power back-off includes at least one of;

information indicating whether to apply the power back-off, or

information indicating a power reduction amount of the downlink by the power back-off,

wherein a resource corresponding to the downlink control channel, among resources corresponding to the downlink data, is excluded from the power back-off.

2. The method of claim 1, wherein when at least one terminal among a plurality of terminals which communicates with a serving cell is configured to use the 256 QAM, the power back-off is applied.

3. The method of claim 1, wherein when the downlink data is downlink data transmitted to the terminal configured to use the 256 QAM among the plurality of terminals which communicates with the serving cell, the power back-off is applied.

4. The method of claim 1, wherein when the downlink data is downlink data transmitted to the terminal which operates in the 256 QAM among the plurality of terminals which communicates with the serving cell, the power back-off is applied.

5. The method of claim 1, wherein the configuration information for the power back-off is signaled by a high layer.

6. The method of claim 1, wherein the downlink control channel is at least one of a Physical Control Format Indicator Channel (PCFICH), a Physical Hybrid-ARQ Indicator Channel (PHICH), a Physical Downlink Control Channel (PDCCH), and an enhanced PDCCH (EPDCCH).

7. The method of claim 1, wherein the resource to which the power back-off is applied is a resource acquired by excluding a resource corresponding to a cell-specific signal from the resources corresponding to the downlink data.

8. The method of claim 7, wherein the cell-specific signal is be at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), a Cell-specific Reference Signal (CRS), and a Positioning Reference Signal (PRS).

9. A terminal for receiving downlink data in a wireless communication system supporting 256 QAM, the terminal comprising:

an RF unit receiving configuration information for power back-off, downlink control information (DCI) through a downlink control channel, and downlink data transmitted based on the configuration information for the power back-off and the DCI; and

a processor demodulating the received downlink data based on the configuration information for the power back-off and the DCI,

wherein the configuration information for the power back-off includes at least one of;

information indicating whether to apply the power back-off, or

information indicating a power reduction amount of the downlink by the power back-off,

wherein a resource corresponding to the downlink control channel, among resources corresponding to the downlink data, is excluded from the power back-off.

10. The terminal of claim 9, wherein when at least one terminal among a plurality of terminals which communicates with a serving cell is configured to use the 256 QAM, the power back-off is applied.

11. The terminal of claim 9, wherein when the downlink data is downlink data transmitted to the terminal configured to use the 256 QAM among the plurality of terminals which communicates with the serving cell.

12. The terminal of claim 9, wherein when the downlink data is downlink data transmitted to the terminal which operates in the 256 QAM among the plurality of terminals which communicates with the serving cell, the power back-off is applied.

13. The terminal of claim 9, wherein the configuration information for the power back-off is signaled by a high layer.