Apparatus and method for transitting channel quality indicator and acknowledgement signals in SC-FDMA communication systems

• US 9,806,869 B2
• Filed: 11/21/2016
• Issued: 10/31/2017
• Est. Priority Date: 07/16/2007
• Status: Active Grant

• Current Assignee: Board of Regents of the University of Nebraska
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Papasakellariou, Aris, Cho, Joon-Young
• Primary Examiner(s): Phillips, Hassan
• Assistant Examiner(s): SHARMA, GAUTAM
• Application Number:
  US15/357,669
• Publication Number:
  US 20170070333A1
• Time in Patent Office: 344 Days
• Field of Search: None
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0028 Formatting
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• 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 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/54 based on quality criteria

Abstract

A method and apparatus are provided for transmitting one or more positive or negative acknowledgement (ACK/NACK) bits in response to data reception in a single-carrier frequency division multiple access (SC-FDMA) communication system. The method includes, if the one or more ACK/NACK bits are one bit, applying a first code to a first symbol, if the acknowledgement bit is NACK, and applying a second code to the first symbol, if the acknowledgement bit is ACK; if the one or more ACK/NACK bits are two bits, applying quadrature phase shift keying (QPSK) modulation to the first symbol based on a value of the two ACK/NACK bits; if no ACK/NACK bit exists, applying the first code to the first symbol; and transmitting the first symbol and a second symbol in a slot.

Claims

1. A method for transmitting one or more positive or negative acknowledgement (ACK/NACK) bits in response to data reception in a single-carrier frequency division multiple access (SC-FDMA) communication system, the method comprising:

if the one or more ACK/NACK bits consists of one bit,

applying a first code to a first symbol, if the acknowledgement bit indicates NACK, and

applying a second code to the first symbol, if the acknowledgement bit indicates ACK;

if the one or more ACK/NACK bits consists of two bits representing two acknowledgements, applying quadrature phase shift keying (QPSK) modulation to the first symbol based on a value of the two ACK/NACK bits;

if no ACK/NACK bit exists, applying the first code to the first symbol; and

transmitting the first symbol and a second symbol in a slot.

2. The method of claim 1, wherein the first symbol is based on the one or more ACK/NACK bits and a reference signal.

3. The method of claim 2, wherein complex scaling coefficients are used for the reference signal, if the one or more ACK/NACK bits are two bits.

4. The method of claim 2, wherein the reference signal is determined based on a constant amplitude zero auto-correlation (CAZAC) sequence, and the first symbol is generated based on the CAZAC sequence.

5. The method of claim 1, wherein a channel quality indication (CQI) bit is transmitted in the second symbol.

6. An apparatus for transmitting one or more positive or negative acknowledgement (ACK/NACK) bits in response to data reception in a single-carrier frequency division multiple access (SC-FDMA) communication system, the apparatus comprising:

a controller configured to;

if the one or more ACK/NACK bits consists of one bit,

apply a first code to a first symbol, if the acknowledgement bit indicates NACK, and

apply a second code to the first symbol, if the acknowledgement bit indicates ACK,

if the one or more ACK/NACK bits consists of two bits representing two acknowledgements, apply quadrature phase shift keying (QPSK) modulation to the first symbol based on a value of the two ACK/NACK bits, and

if no ACK/NACK bit exists, apply the first code to the first symbol; and

a transmitter configured to transmit the first symbol and a second symbol in a slot.

7. The apparatus of claim 6, wherein the first symbol is based on the one or more ACK/NACK bits and a reference signal.

8. The apparatus of claim 7, wherein complex scaling coefficients are used for the reference signal, if the one or more ACK/NACK bits are two bits.

9. The apparatus of claim 7, wherein the reference signal is determined based on a constant amplitude zero auto-correlation (CAZAC) sequence, and the first symbol is generated based on the CAZAC sequence.

10. The apparatus of claim 6, wherein a channel quality indication (CQI) bit is transmitted in the second symbol.

11. A method for receiving one or more positive or negative acknowledgement (ACK/NACK) bits in response to data reception in a single-carrier frequency division multiple access (SC-FDMA) communication system, the method comprising:

receiving a first symbol and a second symbol in a slot; and

identifying a channel quality indicator (CQI) and one or more ACK/NACK bits based on the first symbol and second symbol,

wherein if the one or more ACK/NACK bits consists of one bit,

the acknowledgement bit is identified as NACK, if a first code is applied to the first symbol, and

the acknowledgement bit is identified as ACK, if a second code is applied to the first symbol,

wherein if the one or more ACK/NACK bits consists of two bits representing two acknowledgements, a quadrature phase shift keying (QPSK) modulation is applied to the first symbol based on a value of the two ACK/NACK bits, and

wherein if no ACK/NACK bit exists, the first code is applied to the first symbol.

12. The method of claim 11, wherein the first symbol is based on the one or more ACK/NACK bits and a reference signal.

13. The method of claim 12, wherein complex scaling coefficients are used for the reference signal, if the one or more ACK/NACK bits are two bits.

14. The method of claim 12, wherein the reference signal is determined based on a constant amplitude zero auto-correlation (CAZAC) sequence, and the first symbol is generated based on the CAZAC sequence.

15. The method of claim 11, wherein a CQI bit is received in the second symbol.

16. An apparatus for receiving one or more positive or negative acknowledgement (ACK/NACK) bits in response to data reception in a single-carrier frequency division multiple access (SC-FDMA) communication system, the apparatus comprising:

a receiver configured to receive a first symbol and a second symbol in a slot; and

a controller configured to identify a channel quality indicator (CQI) and one or more ACK/NACK bits based on the first symbol and second symbol,

wherein if the one or more ACK/NACK bits consists of one bit,

the acknowledgement bit is identified as NACK if a first code is applied to the first symbol, and

the acknowledgement bit is identified as ACK if a second code is applied to the first symbol,

wherein if the one or more ACK/NACK bits consists of two bits representing two acknowledgements, a quadrature phase shift keying (QPSK) modulation is applied to the first symbol based on a value of the two ACK/NACK bits, and

wherein if no ACK/NACK bit exists, the first code is applied to the first symbol.

17. The apparatus of claim 16, wherein the first symbol is based on the one or more ACK/NACK bits and a reference signal.

18. The apparatus of claim 17, wherein complex scaling coefficients are used for the reference signal, if the one or more ACK/NACK bits are two bits.

19. The apparatus of claim 17, wherein the reference signal is determined based on a constant amplitude zero auto-correlation (CAZAC) sequence, and the first symbol is generated based on the CAZAC sequence.

20. The apparatus of claim 16, wherein a CQI bits is received in the second symbol.