METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM

• US 20160164589A1
• Filed: 12/02/2015
• Published: 06/09/2016
• Est. Priority Date: 07/19/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Han, Seunghee, Chung, Jaehoon, Lee, Hyunwoo, Lee, Moonil, Ko, Hyunsoo
• Granted Patent: US 9,893,792 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0029 Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling power control H04W52/04
• CPC Class Codes: H04L 1/0031 Multiple signaling transmission H04L1/1664, F15 take precedence
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 27/2636 with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0041 Frequency-non-contiguous
• 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 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 72/56 based on priority criteria

Abstract

The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for reporting CSI in a wireless communication system, the method comprising: a step for configuring a plurality of serving cells; and a step for reporting the CSI of only one serving cell in a corresponding subframe, wherein the step for reporting the CSI of only one serving cell comprises: excluding reporting the CSI of a lower priority when CSI reports of the plurality of serving cells in the corresponding subframe collide; and excluding reporting the CSI of serving cells other than the serving cell having the smallest index when the CSI reports of different serving cells having the same priority in the corresponding subframe collide.

Claims

1-12. -12. (canceled)

13. A method of transmitting a channel state information (CSI) report by a user equipment (UE) in a wireless communication system, the method comprising:

receiving a plurality of periodic CSI report configurations for a plurality of serving cells; and

transmitting one of periodic CSI reports corresponding to the periodic CSI report configurations via a physical uplink control channel (PUCCH) in a subframe,

wherein when a periodic CSI report with a rank indicator (RI) and a periodic CSI report with a channel quality indicator (CQI) collide in the subframe, the periodic CSI report with the CQI has lower priority and is dropped, and

wherein when both of periodic CSI reports colliding in the subframe have a CQI, a periodic CSI report with a subband CQI has lower priority than a periodic CSI report with a wideband CQI and is dropped.

14. The method of claim 13, wherein when periodic CSI reports with a same priority collide in the subframe, CSI reports for one or more serving cells other than one serving cell having the lowest cell index are dropped.

15. The method of claim 13, wherein the periodic CSI periodic configurations includes a first periodic CSI report configuration for a primary cell (PCell) and a second periodic CSI report configuration for a secondary cell (SCell).

16. The method of claim 14, wherein the first periodic CSI report configuration and the second periodic CSI report configuration are independent to each other.

17. The method of claim 13, wherein each of the periodic CSI report configurations includes information on a reporting period.

18. A method of receiving a channel state information (CSI) report by a base station (BS) in a wireless communication system, the method comprising:

transmitting a plurality of periodic CSI report configurations for a plurality of serving cells; and

receiving one of periodic CSI reports corresponding to the periodic CSI report configurations via a physical uplink control channel (PUCCH) in a subframe,

wherein when a periodic CSI report with a rank indicator (RI) and a periodic CSI report with a channel quality indicator (CQI) collide in the subframe, the periodic CSI report with the CQI has lower priority and is dropped, and

wherein when both of periodic CSI reports colliding in the subframe have a CQI, a periodic CSI report with a subband CQI has lower priority than a periodic CSI report with a wideband CQI and is dropped.

19. The method of claim 18, wherein when periodic CSI reports with a same priority collide in the subframe, CSI reports for one or more serving cells other than one serving cell having the lowest cell index are dropped.

20. The method of claim 18, wherein the periodic CSI periodic configurations includes a first periodic CSI report configuration for a primary cell (PCell) and a second periodic CSI report configuration for a secondary cell (SCell).

21. The method of claim 20, wherein the first periodic CSI report configuration and the second periodic CSI report configuration are independent to each other.

22. The method of claim 18, wherein each of the periodic CSI report configurations includes information on a reporting period.

23. A user equipment (UE) transmitting a channel state information (CSI) report, the UE comprising:

a receiver configured to receive a plurality of periodic CSI report configurations for a plurality of serving cells;

a transmitter configured to transmit one of periodic CSI reports corresponding to the periodic CSI report configurations via a physical uplink control channel (PUCCH) in a subframe; and

a processor configured to control the receiver and the transmitter,

wherein when a periodic CSI report with a rank indicator (RI) and a periodic CSI report with a channel quality indicator (CQI) collide in the subframe, the periodic CSI report with the CQI has lower priority and is dropped, and

wherein when both of periodic CSI reports colliding in the subframe have a CQI, a periodic CSI report with a subband CQI has lower priority than a periodic CSI report with a wideband CQI and is dropped.

24. The UE of claim 23, wherein when periodic CSI reports with a same priority collide in the subframe, CSI reports for one or more serving cells other than one serving cell having the lowest cell index are dropped.

25. The UE of claim 23, wherein the periodic CSI periodic configurations includes a first periodic CSI report configuration for a primary cell (PCell) and a second periodic CSI report configuration for a secondary cell (SCell).

26. The UE of claim 24, wherein the first periodic CSI report configuration and the second periodic CSI report configuration are independent to each other.

27. The UE of claim 23, wherein each of the periodic CSI report configurations includes information on a reporting period.

28. A base station (BS) receiving a channel state information (CSI) report, the BS comprising:

a transmitter configured to transmit a plurality of periodic CSI report configurations for a plurality of serving cells;

a receiver configured to receive one of periodic CSI reports corresponding to the periodic CSI report configurations via a physical uplink control channel (PUCCH) in a subframe; and

a processor configured to control the transmitter and the receiver,

wherein when a periodic CSI report with a rank indicator (RI) and a periodic CSI report with a channel quality indicator (CQI) collide in the subframe, the periodic CSI report with the CQI has lower priority and is dropped, and

wherein when both of periodic CSI reports colliding in the subframe have a CQI, a periodic CSI report with a subband CQI has lower priority than a periodic CSI report with a wideband CQI and is dropped.

29. The BS of claim 28, wherein when periodic CSI reports with a same priority collide in the subframe, CSI reports for one or more serving cells other than one serving cell having the lowest cell index are dropped.

30. The BS of claim 28, wherein the periodic CSI periodic configurations includes a first periodic CSI report configuration for a primary cell (PCell) and a second periodic CSI report configuration for a secondary cell (SCell).

31. The BS of claim 30, wherein the first periodic CSI report configuration and the second periodic CSI report configuration are independent to each other.

32. The BS of claim 28, wherein each of the periodic CSI report configurations includes information on a reporting period.