APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING UPLINK CONTROL CHANNELS IN A WIRELESS COMMUNICATION SYSTEM

• US 20090041139A1
• Filed: 07/11/2008
• Published: 02/12/2009
• Est. Priority Date: 07/13/2007
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Heo, Youn-Hyoung, Papasakellariou, Aris, Kwak, Yong-Jun, Han, Jin-Kyu, Cho, Joon-Young, Kwon, Hwan-Joon
• Granted Patent: US 8,254,428 B2
• Time in Patent Office: Days
• US Class Current: 375/260
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• 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

Abstract

A method and apparatus for transmitting/receiving pilot symbols for demodulation of control channel information in the uplink of a wireless communication system are provided. When an Evolved Node B (ENB) expects to receive both the Channel Quality Information (CQI) and the Acknowledgement (ACK)/Negative ACK (NACK) from a User Equipment (UE) in a certain subframe, if the UE transmits only the CQI channel, the ENB is prevented to detect the nonexistent ACK/NACK information from the CQI channel, thereby avoiding false alarm.

Claims

1. A method for transmitting a first type of information bits using a signal in a communication system, the signal comprising one or more slots, a slot comprising a first number and a second number of symbols, wherein a reference signal is transmitted in the first number of symbols and a second type of information bits is transmitted in the second number of symbols, the method comprising the steps of:

modulating the first number of symbols by a first orthogonal cover if the first number of symbols has a first value;

modulating the first number of symbols by a second orthogonal cover if the first number of symbols has a second value; and

transmitting the first number of symbols.

2. The method as in claim 1, wherein the first type of information bits comprises acknowledgement bits corresponding to correct or incorrect reception of data.

3. The method as in claim 1, wherein the second type of information bits comprises channel quality indication (CQI) bits.

4. The method as in claim 1, wherein the first value comprises an indication that CQI bits are transmitted.

5. The method as in claim 1, wherein the second value comprises an indication that CQI bits and acknowledgement bits are transmitted.

6. The method as in claim 1, wherein, when the first number of symbols is two, the first orthogonal cover is {1, 1}, and the second orthogonal cover is {1, −

1}.

7. The method as in claim 1, wherein the communication system comprises a single-carrier frequency domain multiple access communication system.

8. An apparatus for transmitting a first type of information bits using a signal in a communication system, the signal comprising one or more slots, a slot comprising a first number and a second number of symbols, wherein a reference signal is transmitted in the first number of symbols and a second type of information bits is transmitted in the second number of symbols, the apparatus comprising:

a multiplier unit for modulating the first number of symbols by a first orthogonal cover if the first number of symbols has a first value, and modulating the first number of symbols by a second orthogonal cover if the first number of symbols has a second value; and

a transmitter unit for transmitting the first number of symbols.

9. The apparatus as in claim 8, wherein the first type of information bits comprises acknowledgement bits corresponding to correct or incorrect reception of data.

10. The apparatus as in claim 8, wherein the second type of information bits comprises channel quality indication (CQI) bits.

11. The apparatus as in claim 8, wherein the first value comprises an indication that CQI bits are transmitted.

12. The apparatus as in claim 8, wherein the second value comprises an indication that CQI bits and acknowledgement bits are transmitted.

13. The apparatus as in claim 8, wherein, when the first number of symbols is two, the first orthogonal cover is {1, 1}, and the second orthogonal cover is {1, −

1}.

14. The apparatus as in claim 8, wherein the communication system comprises a single-carrier frequency domain multiple access communication system.