System and method for transmitting random access data using orthogonal frequency division multiple access

Abstract

Disclosed is a random access data transmission system and method using OFDMA. The system includes a scheduling ID into an access grant on a preamble for a random access, and transmits it together with an acknowledgment or a non-acknowledgment of the preamble, a base station uses the scheduling ID to notify the mobile station of a random access data transmittable time and a data transmission channel through a control channel, and the mobile station transmits a preamble in advance. After receiving a transmission assignment instruction corresponding to a scheduling ID through the control channel, the mobile station transmits random access data through an assigned channel.

1 .- 15 . (canceled) 
     
     
         16 . A random access method in a wireless communication system, the method at a mobile station comprising:
 transmitting a preamble, without random access message, through preamble transmission channel to a base station;   receiving a preamble response message that conveys a scheduling ID and an assignment information of radio resource of data transmission channel for random access data transmission; and   transmitting random access data to the base station through the radio resource of data transmission channel assigned to the mobile station,   wherein the scheduling ID is specific for the mobile station and identification for random access procedure,   wherein the preamble is generated by using a code that is distinguishable from other codes,   wherein the random access data is transmitted after the preamble is transmitted and the preamble response message is received in response to the preamble, and   wherein the scheduling ID is used for a physical layer and a Medium Access Control (MAC) layer of the mobile station.   
     
     
         17 . The method of  claim 16 , wherein the assignment information of radio resource is associated with the scheduling ID. 
     
     
         18 . The method of  claim 16 , wherein the preamble response message conveys timing and power information for transmitting random access data. 
     
     
         19 . (canceled) 
     
     
         20 . The method of  claim 16 , wherein data transmission channel over which random access data is transmitted is different from preamble transmission channel over which the preamble is transmitted. 
     
     
         21 . The method of  claim 16 , wherein a configuration for receiving the preamble response message is determined in consideration of the maximum value of random access requests available in the base station, and the preamble response message is received from the base station with reference to the configuration. 
     
     
         22 . A random access method in a wireless communication system, the method at a base station comprising:
 receiving a preamble, without random access message, through preamble transmission channel from a mobile station;   transmitting a preamble response message that conveys a scheduling ID and an assignment information of radio resource of data transmission channel for random access data transmission; and   receiving random access data from the mobile station through the radio resource of data transmission channel assigned to the mobile station,   wherein the scheduling ID is specific for the mobile station and identification for random access procedure,   wherein the preamble is generated by using a code that is distinguishable from other codes,   wherein the random access data is transmitted after the preamble is transmitted and the preamble response message is received in response to the preamble, and   wherein the scheduling ID is used for a physical layer and a Medium Access Control (MAC) layer of the mobile station.   
     
     
         23 . The method of  claim 22 , wherein the assignment information of radio resource is associated with the scheduling ID. 
     
     
         24 . The method of  claim 22 , wherein the preamble response message conveys timing and power information for receiving random access data. 
     
     
         25 . (canceled) 
     
     
         26 . The method of  claim 22 , wherein data transmission channel over which random access data is received is different from preamble transmission channel over which the preamble is received. 
     
     
         27 . The method of  claim 22 , wherein a configuration for transmitting the preamble response message is determined in consideration of the maximum value of random access requests available in the base station, and the preamble response message is transmitted to the mobile station with reference to the configuration.