System and method for multiplexing control and data channels in a multiple input, multiple output communications system

Patent metadata

Field	Value
Publication number	US-9935696-B2
Application number	US-201715400709-A
Country	US
Kind code	B2
Filing date	Jan 6, 2017
Priority date	Jan 11, 2010
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

A system and method for system and method for multiplexing control and data channels in a multiple input, multiple output (MIMO) communications system are provided. A method for transmitting control symbols and data symbols on multiple MIMO layers includes selecting a first set of codewords from N cw codewords, distributing control symbols onto the first set of layers, placing data symbols of the first set of codewords onto the first set of layers, placing data symbols of the (N cw −N cw1 ) remaining codewords to remaining layers if N cw >N cw1 , and transmitting the multiple MIMO layers. The first set of codewords is associated with a first set of layers from the multiple MIMO layers, and the N cw codewords are to be transmitted simultaneously and the first set of codewords comprises N cw1 MIMO codewords, where N cw and N cw1 are integers greater than or equal to 1. The remaining layers are MIMO layers from the multiple MIMO layers not in the first set of layers.

First claim

What is claimed is:

1. A method for transmitting control modulation symbols and data modulation symbols of at least one codeword on a plurality of multiple input, multiple output (MIMO) layers, the method comprising:
determining a number of control modulation symbols for each of the plurality of MIMO layers for physical uplink shared channel (PUSCH) transmission in accordance with a rank-dependent offset value of the at least one codeword, the rank-dependent offset value being different for different rank values, wherein a rank value indicates a number of MIMO layers for transmitting one or more codewords, the MIMO layers comprising one or more data information layers and one or more control information layers.

2. The method of claim 1 , wherein the at least one codeword comprises a first codeword and a second codeword, the method further comprising:
multiplexing a first type of the control modulation symbols of the at least one codeword onto the first codeword and multiplexing a second type of the control modulation symbols of the at least one codeword onto the first codeword and the second codeword; and
mapping the first codeword to a first set of the MIMO layers and mapping the second codeword to a second set of the MIMO layers, wherein the first set of the MIMO layers is at least partially different from the second set of the MIMO layers.

3. The method of claim 2 , wherein the first type of the control modulation symbols comprise at least one of channel quality information (CQI) and precoding matrix indicators (PMI), and the second type of the control modulation symbols comprise hybrid automatic repeat requested (HARQ) positive acknowledgement (ACK)/negative acknowledgement (NACK) information, and rank indication (RI) information.

4. The method of claim 2 , wherein the first codeword and the second codeword use a same offset value.

5. The method of claim 2 , wherein the first codeword is selected for the first type of the control modulation symbols according to a Modulation and Coding Scheme (MCS) level of the first codeword.

6. The method of claim 1 , wherein the at least one codeword comprises a plurality of codewords, the method further comprising:
multiplexing a first type of the control modulation symbols of the at least one codeword onto a first set of the codewords and a second type of the control modulation symbols of the at least one codeword onto a second set of the codewords, wherein the first set of the codewords is at least partially different from the second set of the codewords.

7. The method of claim 1 , wherein the control modulation symbols of the at least one codeword comprise at least one of channel quality information (CQI) and precoding matrix indicators (PMI).

8. The method of claim 1 , wherein the control modulation symbols of the at least one codeword comprise at least one of hybrid automatic repeat requested (HARQ) positive acknowledgement (ACK)/negative acknowledgement (NACK) information, and rank indication (RI) information.

9. The method of claim 1 , wherein the control modulation symbols of the at least one codeword are time division multiplexed with the data modulation symbols of the at least one codeword to time-align the control modulation symbols across the MIMO layers.

10. The method of claim 1 , wherein the control modulation symbols of the at least one codeword are multiplexed to same resource elements across the MIMO layers.

11. A method for transmitting control modulation symbols and data modulation symbols on multiple input, multiple output (MIMO) layers, the method comprising:
multiplexing data modulation symbols and control modulation symbols of at least one codeword onto a plurality of multiple input, multiple output (MIMO) layers for a transmission, wherein the multiplexing comprises determining a number of control modulation symbols for each of the plurality of MIMO layers for physical uplink shared channel (PUSCH) transmission in accordance with an offset value of the at least one codeword that is dependent on a rank value for transmitting the at least one codeword, the offset value being different for different rank values, and the rank value indicating a number of the plurality of MIMO layers, wherein the plurality of MIMO layers comprises one or more data information layers and one or more control information layers; and
transmitting the data modulation symbols and control modulation symbols of the at least one codeword on the plurality of MIMO layers on an uplink channel.

12. A system for transmitting control modulation symbols and data modulation symbols of at least one codeword on a plurality of multiple input, multiple output (MIMO) layers, the system comprising:
a transmitter configured to determine a number of control modulation symbols for each of the plurality of MIMO layers for physical uplink shared channel (PUSCH) transmission in accordance with an offset value of the at least one codeword, the offset value varying with a rank value for transmitting the at least one codeword, the offset value being different for different rank values, and the transmitter comprising a plurality of antennas for transmitting the control modulation symbols and the data modulation symbols of the at least one codeword on the plurality of MIMO layers, wherein the rank value indicates a number of the plurality of MIMO layers, wherein the plurality of MIMO layers comprises one or more data information layers and one or more control information layers.

13. The system of claim 12 , wherein the at least one codeword comprises a first codeword and a second codeword, and the transmitter is further configured to:
multiplex a first type of the control modulation symbols of the at least one codeword onto the first codeword and multiplex a second type of the control modulation symbols of the at least one codeword onto the first codeword and the second codeword; and
map the first codeword to a first set of the MIMO layers and map the second codeword to a second set of the MIMO layers, wherein the first set of the MIMO layers is at least partially different from the second set of the plurality of MIMO layers.

14. The system of claim 13 , wherein the first type of the control modulation symbols comprise at least one of channel quality information (CQI) and precoding matrix indicators (PMI), and the second type of the control modulation symbols comprise hybrid automatic repeat requested (HARQ) positive acknowledgement (ACK)/negative acknowledgement (NACK) information, and rank indication (RI) information.

15. The system of claim 13 , wherein the first codeword and the second codeword use a same offset value.

16. The system of claim 13 , wherein the first codeword is selected for the first type of the control modulation symbols according to a Modulation and Coding Scheme (MCS) level of the first codeword.

17. The system of claim 12 , wherein the at least one codeword comprises a plurality of codewords, and the transmitter is further configured to:
multiplex a first type of the control modulation symbols of the at least one codeword onto a first set of the codewords and a second type of the control modulation symbols of the at least one codeword onto a second set of the codewords, wherein the first set of the codewords is at least partially different from the second set of the codewords.

18. The system of claim 12 , wherein the control modulation symbols of the at least one codeword comprise at least one of channel quality information (CQI) and precoding matrix indicators (PMI).

19. The system of claim 12 , wherein t

Assignees

• Futurewei Technologies Inc

Inventors

• Blankenship Yufei
• Xiao Weimin
• Jin Ying

Classifications

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04B7/0456 Primary

  Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting · CPC title

• H04B7/0639

  Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection · CPC title

• H04B7/0632

  Channel quality parameters, e.g. channel quality indicator [CQI] · CPC title

• H04L5/0023

  Time-frequency-space · CPC title