Abstract:
PURPOSE: An apparatus and a method for transmitting and receiving multiple user-multiple input multiple output resource allocation information in a wireless communication system are provided to increase the amount of resource for the transmission of MU-MIMO data burst by minimizing the amount of resource for the transmission of MU-MIMO resource allocation information. CONSTITUTION: A-MAP IE which is allocated with MU-MIMO resources and classified into users is produced The A-MAP IE is transmitted in the position of one resource allocation location is transmitted as a SDMA(Spatial Division Multiple Access) manner. A MU-MIMO data burst and the produced the A-MAP IE are mapped in the same resource area . The same resource area is subband made of SLRU(Subband Logical Resource Unit). The A-MAP IE is mapped with the subband in a SDMA mode. The MU-MIMO data burst is mapped in the remaining area except for the mapped area of the A-MAP IE.
Abstract:
PURPOSE: An uplink transmission electric power control method and apparatus thereof are provided to control uplink transmission power through downlink path loss and uplink path loss in a mobile communication system. CONSTITUTION: An AMS(Advanced Mobile Station) receives PCDMA allocation from an ABS(Advanced Base Station) in case a response signal about the received initial ranging code indicates a success state(225, 227). The AMS determines the initial value of offset(229). The AMS reports the initial value of the determined offset to the ABS(231).
Abstract:
PURPOSE: A device and a method thereof are provided to remarkably reduce initial synchronization acquisition time in a low SNR environment by using a preamble signal and a pilot signal during a synchronization process. CONSTITUTION: A frame synchronization part(100) obtains a frame synchronization by using a preamble signal. A first offset determining part(102) determines a first time offset and a first frequency offset. A preamble identifier estimating part(106) determines a second frequency offset by using the first time offset and a preamble code. A second offset determining part(110) determines the second time offset and a third frequency offset by reversely randomizing the preamble signal and the pilot signal.