Apparatus and method for controlling ranging of mobile terminals in wireless communication system

Abstract

Disclosed are an apparatus and a method for controlling ranging in a wireless communication system. The apparatus according to the present invention comprises a Radio Frequency (RF) module converting RF band signals received via antenna to low-frequency band signal; a Fast Fourier transform (FFT) module converting the low-frequency band signal of time-domain to frequency-domain signal; a derandomizer performing derandomizing the frequency-domain signals by using a random sequence being transmitted by the terminals; a depermutation module combining the frequency-domain signals output from the derandomizer by unit of burst and outputting the combined signal; and a ranging controller controlling periodic ranging of the terminal corresponding to the respective bursts by estimating phase change in the frequency-domain signals of burst unit.

1 - 20 . (canceled) 
     
     
         21 . A method for controlling transmission timing of an uplink in a wireless communication system, the method comprising:
 receiving from at least one terminal a pilot signal, wherein the pilot signal is generated by a predefined equation based on a phase shift; and   transmitting a response message which indicates a timing offset for uplink transmission in response to the pilot signal.   
     
     
         22 . The method of  claim 21 , wherein the response message is used for indicating an uplink scheduling. 
     
     
         23 . The method of  claim 22 , wherein the uplink scheduling is performed based on the phase shift. 
     
     
         24 . The method of  claim 21 , wherein the pilot signal is received by predefined units of burst. 
     
     
         25 . The method of  claim 21 , wherein the timing offset is the change of the uplink timing relative to the current uplink timing. 
     
     
         26 . A method for controlling transmission timing of an uplink in a wireless communication system, the method comprising:
 transmitting a pilot signal to a base station (BS), wherein the pilot signal is generated by a predefined equation based on a phase shift;   receiving from the BS a response message which indicates a timing offset for uplink transmission in response to the pilot signal; and   adjusting the transmission timing of the uplink based on the timing offset.   
     
     
         27 . The method of  claim 26 , wherein the response message is used for indicating an uplink scheduling. 
     
     
         28 . The method of  claim 27 , wherein the uplink scheduling is performed at the BS based on the phase shift. 
     
     
         29 . The method of  claim 26 , wherein the pilot signal is transmitted by predefined units of burst. 
     
     
         30 . The method of  claim 26 , wherein the timing offset is the change of the uplink timing relative to the current uplink timing. 
     
     
         31 . A method for controlling transmission timing of an uplink in a wireless communication system, the method comprising:
 receiving a pilot signal from at least one terminal;   estimating a phase shift by using the received pilot signal; and   transmitting a response message based on the estimated phase shift for uplink timing adjustment.   
     
     
         32 . The method of  claim 31 , wherein the response message is used for indicating an uplink scheduling. 
     
     
         33 . The method of  claim 32 , wherein the uplink scheduling is performed based on the phase shift. 
     
     
         34 . The method of  claim 31 , wherein the signal is transmitted by predefined units of burst. 
     
     
         35 . A method for controlling transmission timing of an uplink in a wireless communication system, the method comprising:
 receiving a pilot signal from at least one terminal, wherein the pilot signal is generated by a predefined equation based on a phase shift;   estimating a timing offset for uplink transmission based on the received pilot signal; and   transmitting a response message which indicates the timing offset in response to the pilot signal.   
     
     
         36 . The method of  claim 35 , wherein the response message is used for indicating an uplink scheduling. 
     
     
         37 . The method of  claim 36 , wherein the uplink scheduling is performed based on the phase shift. 
     
     
         38 . The method of  claim 35 , wherein the pilot signal is received by predefined units of burst. 
     
     
         39 . A terminal for controlling transmission timing of an uplink in a wireless communication system, wherein the terminal is configured to transmit to a base station (BS) a pilot signal which is generated by a predefined equation based on a phase shift, receive from the BS a response message which indicates a timing offset for uplink transmission in response to the pilot signal, and adjust the transmission timing of the uplink based on the timing offset. 
     
     
         40 . The terminal of  claim 39 , wherein the response message is used for indicating an uplink scheduling. 
     
     
         41 . The terminal of  claim 40 , wherein the uplink scheduling is performed at the BS based on the phase shift. 
     
     
         42 . The terminal of  claim 39 , wherein the terminal transmits the pilot signal by predefined units of burst. 
     
     
         43 . The terminal of  claim 39 , wherein the timing offset is the change of the uplink timing relative to the current uplink timing.