METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION

• US 20150049698A1
• Filed: 03/18/2013
• Published: 02/19/2015
• Est. Priority Date: 03/19/2012
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Inventors: Liu, Jin, Zhu, Xudong
• Granted Patent: US 10,425,210 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI

Abstract

A method for transmitting uplink channel state information (CSI) in a coordinated multi-point (CoMP) system is provided, which includes coding and multiplexing operations. In a multiple input multiple output (MIMO) system, a method for transmitting CSI of multiple coordinated points according to an embodiment of the present invention includes coding the CSI of the multiple coordinated points, modulating the coded CSI of the multiple coordinated points, and multiplexing the modulated CSI on a physical uplink shared channel (PUSCH). Multiplexing a rank indicator (RI) in the CSI includes multiplexing different RIs for different uplink ranks, and multiplexing a channel quality indicator/precoding matrix indicator (CQI/PMI) in the CSI includes multiplexing the CQI/PMI in a code word with the highest modulation and coding order and in other code words. Therefore, an issue with the application of the CoMP technology that one user equipment (UE) transmits CSI of multiple coordinated points may be solved, which may facilitate a further development of the CoMP technology.

Claims

1. A method for transmitting channel state information (CSI) of multiple coordinated points in a coordinated multi-Point (CoMP) system, the method comprising:

coding the CSI of the multiple coordinated points;

modulating the coded CSI of the multiple coordinated points; and

multiplexing the modulated CSI on a physical uplink shared channel (PUSCH), wherein

multiplexing a rank indicator (RI) in the CSI comprises multiplexing different RIs for different uplink ranks, and

multiplexing a channel quality indicator/precoding matrix indicator (CQI/PMI) in the CSI comprises multiplexing the CQI/PMI in a code word with the highest modulation and coding order and in other code words.

2. The method according to claim 1, wherein the CSI of the multiple coordinated points is coded by one of a joint coding, separate coding and hybrid coding.

3. The method according to claim 2, when the CSI is multiplexed on the PUSCH, further comprising allocating the same or different resource offset parameters for the CSI after the separate coding or hybrid coding, the resource offset parameters being configured by upper-layer signaling.

4. The method according to claim 3 further comprising transmitting the CSI after the separate coding or hybrid coding in sub-frames continuously or in sub-frames at a predetermined interval, wherein the predetermined interval is set by the upper-layer signaling.

5. The method according to claim 3 further comprising transmitting the CSI after the separate coding or hybrid coding, connected in a predetermined order, in one sub-frame.

6. The method according to claim 5 further comprising indicating by the upper-layer signaling the start point of the coded CSI.

7. The method according to claim 2, wherein the hybrid coding comprises performing a joint coding for the CSI of the coordinated points in each joint coded group, wherein the number of the coordinated points in the joint coded group is designated by the upper-layer signaling.

8. The method according to claim 1, wherein a beta value of the modulated CSI is adjusted when the CSI is mapped to a resource block, and the beta value is a parameter used for calculating the number of information units.

9. The method according to claim 1 further comprising defining indexes of the multiple coordinated points so as to differentiate the CSI of different coordinated points.

10. A method for transmitting channel state information (CSI) of multiple coordinated points in a coordinated multi-point (CoMP) system, the method comprising:

coding the CSI of the multiple coordinated points;

modulating the coded CSI of the multiple coordinated points; and

multiplexing the modulated CSI on a Physical Uplink Shared Channel (PUSCH), wherein

multiplexing a rank indicator (RI) in the CSI comprises multiplexing different RIs for different uplink ranks.

11. The method according to claim 10, wherein multiplexing a channel quality indicator/precoding matrix indicator (CQI/PMI) in the CSI comprises multiplexing the CQI/PMI in a code word with the highest modulation and coding order and in other code words.

12. The method according to claim 10, wherein the CSI of the multiple coordinated points is coded by one of a joint coding, separate coding and hybrid coding.

13. The method according to claim 12, when the CSI is multiplexed on the PUSCH, further comprising allocating the same or different resource offset parameters for the CSI after the separate coding or hybrid coding, the resource offset parameters being configured by upper-layer signaling.

14. The method according to claim 13 further comprising transmitting the CSI after the separate coding or hybrid coding in sub-frames continuously or in sub-frames at a predetermined interval, wherein the predetermined interval is set by the upper-layer signaling.

15. The method according to claim 13 further comprising transmitting the CSI after the separate coding or hybrid coding, connected in a predetermined order, in one sub-frame.

16. The method according to claim 15 further comprising indicating by the upper-layer signaling the start point of the coded CQI/PMI.

17. The method according to claim 12, wherein the hybrid coding comprises performing a joint coding for the CSI of the coordinated points in each joint coded group, wherein the number of the coordinated points in the joint coded group is designated by the upper-layer signaling.

18. The method according to claim 10, wherein a beta value of the modulated CSI is adjusted when the CSI is mapped to a resource block, and the beta value is a parameter used for calculating the number of information units.

19. The method according to claim 10 further comprising defining indexes of the multiple coordinated points so as to differentiate the CSI of different coordinated points.

20. A method for transmitting channel state information (CSI) of multiple coordinated points in a coordinated multi-point (CoMP) system, the method comprising:

coding the CSI of the multiple coordinated points;

modulating the coded CSI of the multiple coordinated points; and

multiplexing the modulated CSI on a physical uplink shared channel (PUSCH), wherein

multiplexing a channel quality indicator/precoding matrix indicator (CQI/PMI) in the CSI comprises multiplexing the CQI/PMI in a code word with the highest modulation and coding order and in other code words.

21. The method according to claim 20, wherein multiplexing a rank indicator (RI) in the CSI comprises one of multiplexing different RIs for different uplink ranks, and repeatedly multiplexing the RI on all the uplink ranks.

22. The method according to claim 20, wherein the CSI of the multiple coordinated points is coded by one of a joint coding, separate coding or hybrid coding.

23. The method according to claim 22, when the CSI is multiplexed on the PUSCH, further comprising allocating the same or different resource offset parameters for the CSI after the separate coding or hybrid coding, the resource offset parameters being configured by upper-layer signaling.

24. The method according to claim 23 further comprising transmitting the CSI after the separate coding or hybrid coding in sub-frames continuously or in sub-frames at a predetermined interval, wherein the predetermined interval is set by the upper-layer signaling.

25. The method according to claim 23 further comprising transmitting the CSI after the separate coding or hybrid coding, connected in a predetermined order, in one sub-frame.

26. The method according to claim 25 further comprising indicating by the upper-layer signaling the start point of the coded CQI/PMI.

27. The method according to claim 22, wherein the hybrid coding comprises performing a joint coding for the CSI of the coordinated points in each joint coded group, wherein the number of the coordinated points in the joint coded group is designated by the upper-layer signaling.

28. The method according to claim 20, wherein a beta value of the modulated CSI is adjusted when the CSI is mapped to a resource block, and the beta value is a parameter used for calculating the number of information units.

29. The method according to claim 20 further comprising defining indexes of the multiple coordinated points so as to differentiate the CSI of different coordinated points.

30. A method for coding channel state information (CSI) of multiple coordinated points in a coordinated multi-point (COMP) system, the method comprising:

determining an information bit number of the CSI of each coordinated point in the multiple coordinated points;

arranging the determined information bit number of each coordinated point in a predetermined order to form an information bit sequence; and

inputting the information bit sequence into a joint coder for joint coding.

31. The method according to claim 30, wherein the information bit number of the CSI of each coordinated point in the multiple coordinated points is determined according to a mode configuration of each coordinated point.

32. The method according to claim 30, wherein the joint coder comprises one of a Reed-Muller coder and a truncated convolutional coder.

33. The method according to claim 32, wherein for the RI in the CSI, when the bit number of the formed information bit sequence exceeds 11 bits, the joint coder comprises multiple connected Reed-Muller coders, and the information bit sequence is segmented and input into the multiple connected Reed-Muller coders.

34. The method according to claim 33, wherein the segmentation is implemented based on an equal bit number or a maximum limit of the input bit number of the Reed-Muller coder.

35. The method according to claim 32, wherein for the CQI/PMI in the CSI, when the bit number of the formed information bit sequence exceeds 11 bits, a truncated convolutional coder is used.

36. The method according to claim 30, wherein the multiple coordinated points belong to the same joint coded group, and the number of the coordinated points in the joint coded group is designated by upper-layer signaling.

37. The method according to claim 30, wherein a beta value of the CSI after the joint coding is adjusted when the CSI is mapped to a resource block, and the beta value is a parameter used for calculating the number of information units.

38. A method for transmitting channel state information (CSI) of multiple coordinated points in a coordinated multi-Point (COMP) system, the method comprising:

performing a separate coding for the CSI of each coordinated point in the multiple coordinated points or in each joint coded group;

modulating the coded CSI of the multiple coordinated points; and

multiplexing the modulated CSI on a physical uplink shared channel (PUSCH), wherein the method further comprises allocating the same or different resource offset parameters for the coded CSI, the resource offset parameters being configured by upper-layer signaling.

39. The method according to claim 38 further comprising transmitting the coded CSI in sub-frames continuously or in sub-frames at a predetermined interval, wherein the predetermined interval is set by the upper-layer signaling.

40. The method according to claim 38 further comprising transmitting the coded CSI, connected in a predetermined order, in one sub-frame.

41. The method according to claim 40 further comprising indicating by the upper-layer signaling the start point of the coded CQI/PMI.

42. The method according to claim 38, wherein the number of the coordinated points in the joint coded group is designated by the upper-layer signaling.

43. The method according to claim 38 further comprising defining indexes of the multiple coordinated points so as to differentiate the CSI of different coordinated points.

44. The method according to claim 38, wherein a beta value of the modulated CSI needs to be adjusted when the CSI is mapped to a resource block, and the beta value is a parameter used for calculating the number of information units.