Patent ID: 8446873

Claim:
A method for uplink transmitting a ranging channel signal by a mobile station in a mobile communication system that performs communication using a superframe, the method comprising: receiving ranging channel configuration information for indicating a first period related to a time interval between two neighboring ranging channel resources and a second period related to a time interval in which the first period is applied, wherein the two neighboring ranging channel resources are repeatedly allocated, wherein the second period is repeated in a time domain and longer than the first period, and wherein the superframe includes four frames, each frame includes a plurality of subframes, and each subframe includes a plurality of orthogonal frequency division multiple access (OFDMA) symbols; and transmitting the ranging channel signal using one of the two neighboring ranging channel resources, wherein the ranging channel signal comprises a cyclic prefix, a preamble and a guard time that spans the plurality of OFDMA symbols in one or more subframes, wherein the two neighboring ranging channel resources are alternatively frequency-hopped to both ends of a system band in accordance with the first period, and one of two guard bands of the ranging channel signal overlaps with one of two guard bands of the system band.