System and method for control information multiplexing for uplink multiple input, multiple output

• US 8,891,461 B2
• Filed: 05/10/2011
• Issued: 11/18/2014
• Est. Priority Date: 06/21/2010
• Status: Active Grant

• Current Assignee: Futurewei Technologies Incorporated (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Futurewei Technologies Incorporated (Huawei Investment & Holding Co., Ltd.)
• Inventors: Xiao, Weimin, Wang, Xianghua, Blankenship, Yufei
• Primary Examiner(s): Thompson, Jr., Otis L
• Application Number:
  US13/104,649
• Publication Number:
  US 20110310780A1
• Time in Patent Office: 1,288 Days
• Field of Search: None
• US Class Current: 370/329
• 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 1/0028 Formatting
• 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 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 1/1864 ARQ related signaling H04L1/1607 takes precedence
• CPC Class Codes: H04L 2025/03426 transmission using multiple-input and multiple-output channels
• CPC Class Codes: H04L 25/03343 Arrangements at the transmitter end
• CPC Class Codes: H04L 27/3488 Multiresolution systems

Abstract

A system and method for control information multiplexing for uplink multiple input, multiple output are provided. A method for transmitting control information over L MIMO layers, where L is an integer value greater than one, includes generating a plurality of control modulation symbols from the control information, filling the L layers by mapping the plurality of control modulation symbols to L layers, and transmitting the L layers.

Claims

1. A method for transmitting control information over L multiple input, multiple output (MIMO) layers, where L is an integer value greater than one, the method comprising:

generating a plurality of control modulation symbols from the control information;

filling the L layers by mapping the plurality of control modulation symbols to the L layers, wherein the L layers do not contain data information; and

transmitting the L layers.

2. The method of claim 1, wherein the control information comprises uplink control information.

3. The method of claim 2, wherein the control information comprises a first group of control information and a second group of control information.

4. The method of claim 3, wherein a number of control modulation symbols generated from the second group of control information is determined by a modulation and coding scheme (MCS) level of the first group of control information.

5. The method of claim 3, wherein the first group of control information comprises channel quality information, a precoding matrix indicator, or a combination thereof.

6. The method of claim 5, wherein generating a plurality of control modulation symbols from the first group of control information comprises:

attaching cyclic redundancy check (CRC) bits to the first group of control information to form a first bit sequence;

encoding the first bit sequence to produce a second bit sequence; and

producing a sequence of control modulation symbols from the second bit sequence.

7. The method of claim 5, wherein a codeword or codewords where the plurality of control modulation symbols is mapped to is provided by downlink control information.

8. The method of claim 7, wherein the downlink control information comprises a modulation and coding scheme information and a request for the first group of control information.

9. The method of claim 2, wherein the control information is transmitted aperiodically.

10. The method of claim 9, wherein the control information is transmitted in response to a trigger.

11. A communications device comprising:

a symbol generate unit configured to generate a plurality of control modulation symbols from control information;

a layer fill unit coupled to the symbol generate unit, the layer fill unit configured to fill L multiple input, multiple output (MIMO) layers by mapping the plurality of control modulation symbols to the L layers, where L is an integer value greater than one, and wherein the L layers do not contain data information; and

a transmitter coupled to the layer fill unit, the transmitter configured to transmit the L layers.

12. The communications device of claim 11, wherein the control information comprises a first group of control information and a second group of control information.

13. The communications device of claim 12, wherein the first group of control information comprises channel quality information, a precoding matrix indicator, or a combination thereof.

14. The communications device of claim 13, wherein the symbol generate unit generates the plurality of control modulation symbols by attaching cyclic redundancy check (CRC) bits to the first group of control information to form a first bit sequence, encoding the first bit sequence to produce a second bit sequence, and producing a sequence of control modulation symbols from the second bit sequence.

15. The communications device of claim 13, wherein a codeword or codewords where the plurality of control modulation symbols is mapped to is provided by downlink control information.

16. The communications device of claim 15, wherein the downlink control information comprises a modulation and coding scheme information and a request for the first group of control information.

17. The communications device of claim 12, wherein a number of control modulation symbols generated from the second group of control information is determined by a modulation and coding scheme (MCS) level of the first group of control information.

18. A method for transmitting control information and data information over (L₁+L₂) multiple input, multiple output (MIMO) layers, where L₁>

=1, L₂>

=1, the method comprising;

generating a plurality of control modulation symbols from the control information, wherein the control information is channel quality information and/or precoding matrix indicator;

filling a first set of layers by mapping the plurality of control modulation symbols to the first set of layers, wherein the first set of layers comprises the L₁ layers;

generating a plurality of data modulation symbols from the data information;

mapping the data modulation symbols to a second set of layers, where the second set of layers comprises the L₂ layers and the second set of layers do not overlap with the first set of layers; and

transmitting the data modulation symbols and the control modulation symbols on the first set of layers and second set of layers simultaneously.

19. The method of claim 18, wherein the first set of layers and the second set of layers are indicated by a combination of fields in a downlink control information transmission.

20. The method of claim 18, further comprising mapping acknowledgement and/or negative acknowledgement information for hybrid automatic repeat requested response to all of the L₁+L₂ MIMO layers.

21. The method of claim 20, wherein a number of modulation symbols generated from the acknowledgement and/or negative acknowledgement information is determined by a modulation and coding scheme (MCS) level of the control information, an MCS level of the data information, or a combination thereof.

22. The method of claim 18, further comprising mapping rank indication (RI) information to all of the L₁+L₂ MIMO layers.

23. A communications device comprising:

a symbol generate unit configured to generate a plurality of control modulation symbols from control information and a plurality of data modulation symbols from data information, wherein the control information is channel quality information and/or precoding matrix indicator;

a layer fill unit coupled to the symbol generate unit, the layer fill unit configured to fill a first set of multiple input, multiple output (MIMO) layers by mapping the plurality of control modulation symbols to the first set of layers and to fill a second set of MIMO layers by mapping the data modulation symbols to the second set of layers, wherein the first set of layers comprises L₁ layers and the second set of layers comprises L₂ layers, wherein L₁ and L₂ are integer values and L₁>

=1, L₂>

=1, and wherein the first set of layers does not overlap with the second set of layers; and

a transmitter coupled to the layer fill unit, the transmitter configured to simultaneously transmit the first set of layers and the second set of layers.

26. The communications device of claim 23, wherein the layer fill unit is further configured to map rank indication (RI) information to all of the L₁+L₂ layers.

24. The communications device of 23, wherein the layer fill unit is further configured to map acknowledgement and/or negative acknowledgement information for hybrid automatic repeat requested response to all of the L₁+L₂ layers.

25. The communications device of claim 24, wherein a number of modulation symbols generated from the acknowledgement and/or negative acknowledgement information is determined by a modulation and coding scheme (MCS) level of the control information, an MCS level of the data information, or a combination thereof.