COMMON AND DEDICATED MODULATION AND CODING SCHEME FOR A MULTICARRIER SYSTEM

• US 20100103920A1
• Filed: 10/21/2009
• Published: 04/29/2010
• Est. Priority Date: 10/22/2008
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Montojo, Juan, Damnjanovic, Jelena M., Farajidana, Amir
• Granted Patent: US 8,310,981 B2
• Time in Patent Office: Days
• US Class Current: 370/344
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0038 Blind format detection for detection of modulation format H04L27/0012
• CPC Class Codes: H04L 27/0012 arrangements for identifying the type of modulation
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0046 Determination of how many bits are transmitted on different sub-channels
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated

Abstract

A method, an apparatus, and a computer program product for wireless communication are provided in which at least one modulation and coding scheme (MCS) is determined based on feedback received for a plurality of downlink (DL) carriers and transmitted from a device. Data is modulated and coded, according to the at least one MCS, for transmission to the device on the DL carriers.

Claims

1. A method for wireless communication, comprising:

determining at least one modulation and coding scheme based on feedback received for a plurality of downlink carriers and transmitted from a device; and

modulating and coding data, according to the at least one modulation and coding scheme, for transmission to the device on the downlink carriers.

2. The method of claim 1, further comprising:

notifying the device of the determined at least one modulation and coding scheme.

3. The method of claim 1, wherein the feedback is channel quality indication feedback.

4. The method of claim 1, wherein the at least one modulation and coding scheme comprises a single modulation and coding scheme.

5. The method of claim 4, wherein:

the data comprises a first transport block and a second transport block multiplexed into a combined data block; and

the method further comprises mapping the modulated and coded combined data block for transmission on the downlink carriers.

6. The method of claim 4, further comprising determining, for the data and for the single modulation and coding scheme, a number N of transport blocks and a size of each of the transport blocks.

7. The method of claim 6, wherein the number N of transport blocks for the single modulation and coding scheme is determined as N=┌

T|T′

┘

, where T is a first transport block size determined based on a first number of resource blocks N_RB in a first transport block and an index of the single modulation and coding scheme, and T′

is a second transport block size determined based on a second number of resource blocks N′

_RB in a second transport block and the index of the single modulation and coding scheme.

8. The method of claim 7, wherein the size of each of the N transport blocks is T′

for the first N−

1 transport blocks and T−

(N−

1)T′

rounded up to a nearest second transport block size for the N^th transport block.

9. The method of claim 7, wherein the size of each of the N transport blocks is T/N rounded up to a nearest second transport block size.

10. The method of claim 1, wherein:

the plurality of downlink carriers comprise a first downlink carrier and a second downlink carrier;

the at least one modulation and coding scheme comprises a first modulation and coding scheme and a second modulation and coding scheme determined separately from the first modulation and coding scheme, the first modulation and coding scheme being determined based on said feedback received for the first downlink carrier and the second modulation and coding scheme being determined based on said feedback received for the second downlink carrier;

the first modulation and coding scheme is used to modulate and code the data on the first downlink carrier; and

the second modulation and coding scheme is used to modulate and code the data on the second downlink carrier.

11. The method of claim 10, wherein:

the data comprises a first transport block and a second transport block;

the first transport block is modulated and coded by the first modulation and coding scheme and the second transport block is modulated and coded by the second modulation and coding scheme; and

the method further comprises mapping the modulated and coded first transport block for transmission on the first downlink carrier and mapping the modulated and coded second transport block for transmission on the second downlink carrier.

12. The method of claim 1, wherein:

the plurality of downlink carriers comprise a first downlink carrier, a second downlink carrier, and a third downlink carrier;

the at least one modulation and coding scheme comprises a first modulation and coding scheme and a second modulation and coding scheme determined separately from the first modulation and coding scheme;

the first modulation and coding scheme is used to modulate and code the data on the first downlink carrier;

the second modulation and coding scheme is used to modulate and code the data on the third downlink carrier; and

the first modulation and coding scheme or the second modulation and coding scheme is used to modulate and code the data on the second downlink carrier.

13. The method of claim 12, wherein:

the data comprises a first transport block and a second transport block multiplexed into a first combined data block and comprises a third transport block and a fourth transport block multiplexed into a second combined data block;

the first combined data block is modulated and coded by the first modulation and coding scheme;

the second combined data block is modulated and coded by the second modulation and coding scheme; and

the method further comprises mapping the modulated and coded first combined data block for transmission on the first downlink carrier and the second downlink carrier, and mapping the modulated and coded second combined data block for transmission on the third downlink carrier.

14. The method of claim 12, wherein:

the first modulation and coding scheme is used to modulate and code the data on the second downlink carrier;

said feedback received for the first downlink carrier and said feedback received for the second downlink carrier are combined into a combined feedback, the combined feedback corresponding to an average channel quality of the first and second downlink carriers;

the first modulation and coding scheme is determined based on said combined feedback; and

the second modulation and coding scheme is determined based on said feedback received for the third downlink carrier.

15. A method for wireless communication, comprising:

receiving, from a device, a signal in at least one uplink carrier, the at least one uplink carrier comprising one selected from the group consisting of a plurality of uplink carriers and one uplink carrier containing N single-carrier frequency division multiple access transmissions, where N≧

2;

determining a channel quality of each received signal;

determining at least one modulation and coding scheme based on the determined channel quality; and

demodulating and decoding data in the at least one uplink carrier from the device according to the at least one modulation and coding scheme.

16. The method of claim 15, further comprising:

notifying the device of the determined at least one modulation and coding scheme.

17. The method of claim 15, wherein the at least one uplink carrier comprises a plurality of uplink carriers and the at least one modulation and coding scheme comprises a single modulation and coding scheme.

18. The method of claim 15, wherein:

the at least one uplink carrier comprises a plurality of uplink carriers and the plurality of uplink carriers comprise a first uplink carrier and a second uplink carrier;

the at least one modulation and coding scheme comprises a first modulation and coding scheme and a second modulation and coding scheme determined separately from the first modulation and coding scheme, the first modulation and coding scheme being determined based on said channel quality for the first downlink carrier and the second modulation and coding scheme being determined based on said channel quality for the second downlink carrier;

the first modulation and coding scheme is used to modulate and code the data on the first uplink carrier; and

the second modulation and coding scheme is used to modulate and code the data on the second uplink carrier.

19. The method of claim 15, wherein:

the at least one uplink carrier comprises a plurality of uplink carriers and the plurality of uplink carriers comprise a first uplink carrier, a second uplink carrier, and a third uplink carrier;

the at least one modulation and coding scheme comprises a first modulation and coding scheme and a second modulation and coding scheme determined separately from the first modulation and coding scheme;

the first modulation and coding scheme is used to modulate and code the data on the first uplink carrier;

the second modulation and coding scheme is used to modulate and code the data on the second uplink carrier; and

the first modulation and coding scheme or the second modulation and coding scheme is used to modulate and code the data on the third uplink carrier.

20. The method of claim 15, wherein:

the at least one uplink carrier comprises one carrier containing said N single-carrier frequency division multiple access transmissions;

the at least one modulation and coding scheme comprises a single modulation and coding scheme;

the data comprises a first transport block and a second transport block;

the first and second transport blocks are modulated and coded by the single modulation and coding scheme; and

the method further comprises mapping the modulated and coded first and second transport blocks for transmission on the N single-carrier frequency division multiple access transmissions.

21. A method for wireless communication, comprising:

sending feedback for a plurality downlink carriers;

receiving information on at least one modulation and coding scheme determined based on the feedback; and

demodulating and decoding data received on the downlink carriers according to the information.

22. The method of claim 21, wherein the feedback is channel quality indication feedback.

23. The method of claim 21, wherein the at least one modulation and coding scheme comprises a single modulation and coding scheme.

24. The method of claim 21, wherein:

the plurality of downlink carriers comprise a first downlink carrier and a second downlink carrier;

the at least one modulation and coding scheme comprises a first modulation and coding scheme and a second modulation and coding scheme determined separately from the first modulation and coding scheme, the first modulation and coding scheme being determined based on said feedback sent for the first downlink carrier and the second modulation and coding scheme being determined based on said feedback sent for the second downlink carrier;

the first modulation and coding scheme is used to demodulate and decode the data on the first downlink carrier; and

the second modulation and coding scheme is used to demodulate and decode the data on the second downlink carrier.

25. The method of claim 21, wherein:

the plurality of downlink carriers comprise a first downlink carrier, a second downlink carrier, and a third downlink carrier;

the at least one modulation and coding scheme comprises a first modulation and coding scheme and a second modulation and coding scheme determined separately from the first modulation and coding scheme, the first modulation and coding scheme being determined based on said feedback sent for the first downlink carrier and the second modulation and coding scheme being determined based on said feedback sent for the third downlink carrier;

the first modulation and coding scheme is used to demodulate and decode the data on the first downlink carrier;

the second modulation and coding scheme is used to demodulate and decode the data on the third downlink carrier; and

the first modulation and coding scheme or the second modulation and coding scheme is used to demodulate and decode the data on the second downlink carrier.

26. A method for wireless communication, comprising:

sending a signal on at least one uplink carrier, the at least one uplink carrier comprising one selected from the group consisting of a plurality of uplink carriers and one uplink carrier containing N single-carrier frequency division multiple access transmissions, where N≧

2;

receiving information on at least one modulation and coding scheme determined based on a channel quality of each signal; and

modulating and coding data, for transmission in the at least one uplink carrier, according to the information.

27. The method of claim 26, wherein the at least one uplink carrier comprises a plurality of uplink carriers and the at least one modulation and coding scheme comprises a single modulation and coding scheme.

28. The method of claim 26, wherein:

the at least one uplink carrier comprises a plurality of uplink carriers and the plurality of uplink carriers comprise a first uplink carrier and a second uplink carrier;

the at least one modulation and coding scheme comprises a first modulation and coding scheme and a second modulation and coding scheme determined separately from the first modulation and coding scheme, the first modulation and coding scheme being determined based on said channel quality for the first downlink carrier and the second modulation and coding scheme being determined based on said channel quality for the second downlink carrier;

the first modulation and coding scheme is used to modulate and code the data on the first uplink carrier; and

the second modulation and coding scheme is used to modulate and code the data on the second uplink carrier.

29. The method of claim 26, wherein:

the at least one uplink carrier comprises a plurality of uplink carriers and the plurality of uplink carriers comprise a first uplink carrier, a second uplink carrier, and a third uplink carrier;

the at least one modulation and coding scheme comprises a first modulation and coding scheme and a second modulation and coding scheme determined separately from the first modulation and coding scheme;

the first modulation and coding scheme is used to modulate and code the data on the first uplink carrier;

the second modulation and coding scheme is used to modulate and code the data on the second uplink carrier; and

the first modulation and coding scheme or the second modulation and coding scheme is used to modulate and code the data on the third uplink carrier.

30. An apparatus operable in a wireless communication system, comprising:

means for determining at least one modulation and coding scheme based on feedback received for a plurality of downlink carriers and transmitted from a device; and

means for modulating and coding data, according to the at least one modulation and coding scheme, for transmission to the device on the downlink carriers.

31. The apparatus of claim 30, further comprising:

means for notifying the device of the determined at least one modulation and coding scheme.

32. The apparatus of claim 30, wherein the feedback is channel quality indication feedback.

33. The apparatus of claim 30, wherein the at least one modulation and coding scheme comprises a single modulation and coding scheme.

34. The apparatus of claim 33, wherein:

the data comprises a first transport block and a second transport block multiplexed into a combined data block; and

the apparatus further comprises means for mapping the modulated and coded combined data block for transmission on the downlink carriers.

35. The apparatus of claim 33, further comprising means for determining, for the data and for the single modulation and coding scheme, a number N of transport blocks and a size of each of the transport blocks.

36. The apparatus of claim 35, wherein the number N of transport blocks for the single modulation and coding scheme is determined as N=┌

T|T′

┐

, where T is a first transport block size determined based on a first number of resource blocks N_RB in a first transport block and an index of the single modulation and coding scheme, and T′

is a second transport block size determined based on a second number of resource blocks N′

_RB in a second transport block and the index of the single modulation and coding scheme.

37. The apparatus of claim 36, wherein the size of each of the N transport blocks is T′

for the first N−

1 transport blocks and T−

(N−

1)T′

rounded up to a nearest second transport block size for the N^th transport block.

38. The apparatus of claim 36, wherein the size of each of the N transport blocks is T/N rounded up to a nearest second transport block size.

39. The apparatus of claim 30, wherein:

the plurality of downlink carriers comprise a first downlink carrier and a second downlink carrier;

the at least one modulation and coding scheme comprises a first modulation and coding scheme and a second modulation and coding scheme determined separately from the first modulation and coding scheme, the first modulation and coding scheme being determined based on said feedback received for the first downlink carrier and the second modulation and coding scheme being determined based on said feedback received for the second downlink carrier;

the first modulation and coding scheme is used to modulate and code the data on the first downlink carrier; and

the second modulation and coding scheme is used to modulate and code the data on the second downlink carrier.

40. The apparatus of claim 39, wherein:

the data comprises a first transport block and a second transport block;

the first transport block is modulated and coded by the first modulation and coding scheme and the second transport block is modulated and coded by the second modulation and coding scheme; and

the apparatus further comprises means for mapping the modulated and coded first transport block for transmission on the first downlink carrier and mapping the modulated and coded second transport block for transmission on the second downlink carrier.

41. The apparatus of claim 30, wherein:

the plurality of downlink carriers comprise a first downlink carrier, a second downlink carrier, and a third downlink carrier;

the at least one modulation and coding scheme comprises a first modulation and coding scheme and a second modulation and coding scheme determined separately from the first modulation and coding scheme;

the first modulation and coding scheme is used to modulate and code the data on the first downlink carrier;

the second modulation and coding scheme is used to modulate and code the data on the third downlink carrier; and

the first modulation and coding scheme or the second modulation and coding scheme is used to modulate and code the data on the second downlink carrier.

42. The apparatus of claim 41, wherein:

the data comprises a first transport block and a second transport block multiplexed into a first combined data block and comprises a third transport block and a fourth transport block multiplexed into a second combined data block;

the first combined data block is modulated and coded by the first modulation and coding scheme;

the second combined data block is modulated and coded by the second modulation and coding scheme; and

the apparatus further comprises means for mapping the modulated and coded first combined data block for transmission on the first downlink carrier and the second downlink carrier, and mapping the modulated and coded second combined data block for transmission on the third downlink carrier.

43. The apparatus of claim 41, wherein:

the first modulation and coding scheme is used to modulate and code the data on the second downlink carrier;

said feedback received for the first downlink carrier and said feedback received for the second downlink carrier are combined into a combined feedback, the combined feedback corresponding to an average channel quality of the first and second downlink carriers;

the first modulation and coding scheme is determined based on said combined feedback; and

the second modulation and coding scheme is determined based on said feedback received for the third downlink carrier.

44. An apparatus for wireless communication, comprising:

means for receiving, from a device, a signal in at least one uplink carrier, the at least one uplink carrier comprising one selected from the group consisting of a plurality of uplink carriers and one uplink carrier containing N single-carrier frequency division multiple access transmissions, where N≧

2;

means for determining a channel quality of each received signal;

means for determining at least one modulation and coding scheme based on the determined channel quality; and

means for demodulating and decoding data in the at least one uplink carrier from the device according to the at least one modulation and coding scheme.

45. The apparatus of claim 44, further comprising:

means for notifying the device of the determined at least one modulation and coding scheme.

46. The apparatus of claim 44, wherein the at least one uplink carrier comprises a plurality of uplink carriers and the at least one modulation and coding scheme comprises a single modulation and coding scheme.

47. The apparatus of claim 44, wherein:

the at least one uplink carrier comprises a plurality of uplink carriers and the plurality of uplink carriers comprise a first uplink carrier and a second uplink carrier;

the at least one modulation and coding scheme comprises a first modulation and coding scheme and a second modulation and coding scheme determined separately from the first modulation and coding scheme, the first modulation and coding scheme being determined based on said channel quality for the first downlink carrier and the second modulation and coding scheme being determined based on said channel quality for the second downlink carrier;

the first modulation and coding scheme is used to modulate and code the data on the first uplink carrier; and

the second modulation and coding scheme is used to modulate and code the data on the second uplink carrier.

48. The apparatus of claim 44, wherein:

the at least one uplink carrier comprises a plurality of uplink carriers and the plurality of uplink carriers comprise a first uplink carrier, a second uplink carrier, and a third uplink carrier;

the at least one modulation and coding scheme comprises a first modulation and coding scheme and a second modulation and coding scheme determined separately from the first modulation and coding scheme;

the first modulation and coding scheme is used to modulate and code the data on the first uplink carrier;

the second modulation and coding scheme is used to modulate and code the data on the second uplink carrier; and

the first modulation and coding scheme or the second modulation and coding scheme is used to modulate and code the data on the third uplink carrier.

49. The apparatus of claim 44, wherein:

the at least one uplink carrier comprises one carrier containing said N single-carrier frequency division multiple access transmissions;

the at least one modulation and coding scheme comprises a single modulation and coding scheme;

the data comprises a first transport block and a second transport block;

the first and second transport blocks are modulated and coded by the single modulation and coding scheme; and

the apparatus further comprises means for mapping the modulated and coded first and second transport blocks for transmission on the N single-carrier frequency division multiple access transmissions.

50. An apparatus for wireless communication, comprising:

means for sending feedback for a plurality downlink carriers;

means for receiving information on at least one modulation and coding scheme determined based on the feedback; and

means for demodulating and decoding data received on the downlink carriers according to the information.

51. The apparatus of claim 50, wherein the feedback is channel quality indication feedback.

52. The apparatus of claim 50, wherein the at least one modulation and coding scheme comprises a single modulation and coding scheme.

53. The apparatus of claim 50, wherein:

the plurality of downlink carriers comprise a first downlink carrier and a second downlink carrier;

the at least one modulation and coding scheme comprises a first modulation and coding scheme and a second modulation and coding scheme determined separately from the first modulation and coding scheme, the first modulation and coding scheme being determined based on said feedback sent for the first downlink carrier and the second modulation and coding scheme being determined based on said feedback sent for the second downlink carrier;

the first modulation and coding scheme is used to demodulate and decode the data on the first downlink carrier; and

the second modulation and coding scheme is used to demodulate and decode the data on the second downlink carrier.

54. The apparatus of claim 50, wherein:

the plurality of downlink carriers comprise a first downlink carrier, a second downlink carrier, and a third downlink carrier;

the at least one modulation and coding scheme comprises a first modulation and coding scheme and a second modulation and coding scheme determined separately from the first modulation and coding scheme, the first modulation and coding scheme being determined based on said feedback sent for the first downlink carrier and the second modulation and coding scheme being determined based on said feedback sent for the third downlink carrier;

the first modulation and coding scheme is used to demodulate and decode the data on the first downlink carrier;

the second modulation and coding scheme is used to demodulate and decode the data on the third downlink carrier; and

the first modulation and coding scheme or the second modulation and coding scheme is used to demodulate and decode the data on the second downlink carrier.

55. An apparatus for wireless communication, comprising:

means for sending a signal on at least one uplink carrier, the at least one uplink carrier comprising one selected from the group consisting of a plurality of uplink carriers and one uplink carrier containing N single-carrier frequency division multiple access transmissions, where N≧

2;

means for receiving information on at least one modulation and coding scheme determined based on a channel quality of each signal; and

means for modulating and coding data, for transmission in the at least one uplink carrier, according to the information.

56. The apparatus of claim 55, wherein the at least one uplink carrier comprises a plurality of uplink carriers and the at least one modulation and coding scheme comprises a single modulation and coding scheme.

57. The apparatus of claim 55, wherein:

the at least one uplink carrier comprises a plurality of uplink carriers and the plurality of uplink carriers comprise a first uplink carrier and a second uplink carrier;

the at least one modulation and coding scheme comprises a first modulation and coding scheme and a second modulation and coding scheme determined separately from the first modulation and coding scheme, the first modulation and coding scheme being determined based on said channel quality for the first downlink carrier and the second modulation and coding scheme being determined based on said channel quality for the second downlink carrier;

the first modulation and coding scheme is used to modulate and code the data on the first uplink carrier; and

the second modulation and coding scheme is used to modulate and code the data on the second uplink carrier.

58. The apparatus of claim 55, wherein:

the at least one uplink carrier comprises a plurality of uplink carriers and the plurality of uplink carriers comprise a first uplink carrier, a second uplink carrier, and a third uplink carrier;

the at least one modulation and coding scheme comprises a first modulation and coding scheme and a second modulation and coding scheme determined separately from the first modulation and coding scheme;

the first modulation and coding scheme is used to modulate and code the data on the first uplink carrier;

the second modulation and coding scheme is used to modulate and code the data on the second uplink carrier; and

the first modulation and coding scheme or the second modulation and coding scheme is used to modulate and code the data on the third uplink carrier.

59. A computer program product, comprising:

a computer-readable medium, comprising;

code for determining at least one modulation and coding scheme based on feedback received for a plurality of downlink carriers and transmitted from a device; and

code for modulating and coding data, according to the at least one modulation and coding scheme, for transmission to the device on the downlink carriers.

60. A computer program product, comprising:

a computer-readable medium, comprising;

code for receiving, from a device, a signal in at least one uplink carrier, the at least one uplink carrier comprising one selected from the group consisting of a plurality of uplink carriers and one uplink carrier containing N single-carrier frequency division multiple access transmissions, where N≧

2;

code for determining a channel quality of each received signal;

code for determining at least one modulation and coding scheme based on the determined channel quality; and

code for demodulating and decoding data in the at least one uplink carrier from the device according to the at least one modulation and coding scheme.

61. A computer program product, comprising:

a computer-readable medium, comprising;

code for sending feedback for a plurality downlink carriers;

code for receiving information on at least one modulation and coding scheme determined based on the feedback; and

code for demodulating and decoding data received on the downlink carriers according to the information.

62. A computer program product, comprising:

a computer-readable medium, comprising;

code for sending a signal on at least one uplink carrier, the at least one uplink carrier comprising one selected from the group consisting of a plurality of uplink carriers and one uplink carrier containing N single-carrier frequency division multiple access transmissions, where N≧

2;

code for receiving information on at least one modulation and coding scheme determined based on a channel quality of each signal; and

code for modulating and coding data, for transmission in the at least one uplink carrier, according to the information.

63. An apparatus for wireless communication, comprising:

a processing system configured to;

determine at least one modulation and coding scheme based on feedback received for a plurality of downlink carriers and transmitted from a device; and

modulate and code data, according to the at least one modulation and coding scheme, for transmission to the device on the downlink carriers.

64. An apparatus for wireless communication, comprising:

a processing system configured to;

receive, from a device, a signal in at least one uplink carrier, the at least one uplink carrier comprising one selected from the group consisting of a plurality of uplink carriers and one uplink carrier containing N single-carrier frequency division multiple access transmissions, where N≧

2;

determine a channel quality of each received signal;

determine at least one modulation and coding scheme based on the determined channel quality; and

demodulate and decode data in the at least one uplink carrier from the device according to the at least one modulation and coding scheme.

65. An apparatus for wireless communication, comprising:

a processing system configured to;

send feedback for a plurality downlink carriers;

receive information on at least one modulation and coding scheme determined based on the feedback; and

demodulate and decode data received on the downlink carriers according to the information.

66. An apparatus for wireless communication, comprising:

a processing system configured to;

send a signal on at least one uplink carrier, the at least one uplink carrier comprising one selected from the group consisting of a plurality of uplink carriers and one uplink carrier containing N single-carrier frequency division multiple access transmissions, where N≧

2;

receive information on at least one modulation and coding scheme determined based on a channel quality of each signal; and

modulate and code data, for transmission in the at least one uplink carrier, according to the information.