Patent ID: 8326335

Claim:
A mobile terminal to receive and transmit information for an uplink in a mobile communication system, the mobile terminal comprising: a transmission part; a reception part; and a processor for supporting the receiving and transmitting information for the uplink, wherein the processor is configured to: acquire a downlink synchronization with a base station; receive an uplink channel descriptor (UCD), including first ranging region information related to a first allocation region for at least a ranging request or an uplink bandwidth request, from the base station by using the reception part; receive an uplink map information element, including second ranging region information related to a second allocation region for at least the ranging request or the uplink bandwidth request, from the base station by using the reception part; and transmit codes related to at least the ranging request or the uplink bandwidth request to the base station using the second ranging region information since the second ranging region information has priority over the first ranging region information by using the transmission part, wherein the first ranging region information includes first fields of an orthogonal frequency division multiple access (OFDMA) symbol offset, a sub-channel offset, a number of OFDMA symbols, a number of sub-channels and a ranging method, and wherein the second ranging region information includes second fields of an OFDMA symbol offset, a sub-channel offset, a number of OFDMA symbols, a number of sub-channels and a ranging method.