Method for transmitting control signal using efficient multiplexing

Abstract

Methods of transmitting a control signal using efficient multiplexing are disclosed. One of the method includes the steps of multiplexing a plurality of 1-bit control signals within a prescribed time-frequency domain by code division multiple access (CDMA) and transmitting the multiplexed control signals, wherein a plurality of the 1-bit control signals include a plurality of the 1-bit control signals for a specific transmitting side. Accordingly, reliability on 1-bit control signal transmission can be enhanced.

What is claimed is: 
     
       1. A method of transmitting a control signal, the method comprising:
 multiplexing a plurality of 1-bit control signals within a single prescribed time-frequency domain by a code division multiple access (CDMA) scheme, wherein the plurality of 1-bit control signals multiplexed within the single prescribed time-frequency domain are distinguished by orthogonal or pseudo-orthogonal codes used for multiplexing each of the plurality of 1-bit control signals; 
 repeating multiplexing of the plurality of multiplexed control signals in different frequency domains; and 
 transmitting the repeatedly multiplexed control signals. 
 
     
     
       2. The method of  claim 1 , wherein when a time domain used for the control signal transmission comprises a single OFDM symbol zone, the repeating comprises repeatedly multiplexing the multiplexed control signals in the different frequency domains within the single OFDM symbol zone. 
     
     
       3. The method of  claim 1 , wherein when a time domain used for the control signal transmission comprises a plurality of OFDM symbol zones, the repeating comprises repeatedly multiplexing the multiplexed control signals in the different frequency domains within the plurality of OFDM symbol zones that are different from each other. 
     
     
       4. The method of  claim 1 , wherein in the multiplexing, the plurality of 1-bit control signals are further distinguished by different orthogonal phase components. 
     
     
       5. A method of transmitting a control signal, the method comprising:
 multiplexing a plurality of 1-bit control signals within a single prescribed time-frequency domain by a code division multiple access (CDMA) scheme; 
 multiplexing the multiplexed plurality of 1-bit control signals by at least a time division multiple access (TDMA) scheme or a frequency division multiple access (FDMA) scheme such that the multiplexing of the plurality of 1-bit control signals is repeated within an additional time-frequency domain other than the single prescribed time-frequency domain; and 
 transmitting the multiplexed control signals. 
 
     
     
       6. The method of  claim 5 , wherein the plurality of 1-bit control signals for different transmitting sides are multiplexed within the single prescribed time-frequency domain and the additional time-frequency domain by the CDMA scheme, respectively. 
     
     
       7. The method of  claim 5 , wherein a 1-bit control signal for a specific transmitting side is multiplexed with other 1-bit control signals using orthogonal or pseudo-orthogonal codes that are different from each other, the method further comprising:
 repeating the multiplexing of the 1-bit control signal for the specific transmitting side within the additional time-frequency domain other than the single prescribed time-frequency domain; and 
 transmitting the repeatedly multiplexed 1-bit control signal for the specific transmitting side. 
 
     
     
       8. The method of  claim 7 , wherein the orthogonal or pseudo-orthogonal codes comprise a code sequence having a length corresponding to a size of the single prescribed time-frequency domain. 
     
     
       9. The method of  claim 1 , wherein the plurality of 1-bit control signals comprise ACK/NACK signals. 
     
     
       10. The method of  claim 5 , wherein the plurality of 1-bit control signals comprise ACK/NACK signals.