Patent ID: 8681734

Claim:
A method for transmitting a ranging signal at a user equipment in a wireless communication system, the method comprising: acquiring cell identification information by using a preamble received from a base station; determining time resource allocation information by using the cell identification information, information on the number of ranging channels allocated per subframe, and information on the number of time resource units of at least one of super frame, frame, and subframe; determining frequency resource allocation information by using the cell identification information and information on the number of allocated subbands; and transmitting a ranging signal by using a subband indicated by the frequency resource allocation information in a subframe indicated by the time resource allocation information, wherein the time resource allocation information comprises an index of the subframe for transmitting the ranging signal, and wherein the index of the subframe is determined using the following Equation: I SF =mod(ƒ(CellID), n SF * n F / N — RCH ) in the above Equation, I SF represents the index of the subframe to which ranging channel resources are allocated, CellID represents identification information of a cell to which the user equipment belongs, n SF represents the number of subframes constituting one frame, n F represents the number of frames constituting one super frame, N_RCH represents the number of ranging channels allocated per subframe, and mod(A, B) represents a modulo function that means a remainder obtained by dividing A by B.