Patent ID: 7664076
Filing Date: 2010-02-16
Classification: H04B,H04J,H04W

Abstract:
1. A random access apparatus comprising: a radio frequency (RF) transmitting/receiving unit configured to receive a preamble introduction broadcasting signal from a base station and to transmit a random access preamble to the base station; an introduction broadcasting signal processing unit configured to extract a random access usage relating to M-sequences and hadamard sequences from the received preamble introduction broadcasting signal; a selecting unit configured to select a plurality of M-sequences and a hadamard sequence corresponding to a random access purpose based on the extracted random access usage; and a preamble generating unit configured to produce the random access preamble multiplying the selected plurality of M-sequences and the selected hadamard sequence, wherein the preamble generating unit includes: a first M-sequence generating unit configured to generate a first M-sequence having an initial value determined by a first identifier of the base station; a second M-sequence generating unit configured to generate a second M-sequence having an initial value determined by a random number; a hadamard sequence generating unit configured to generate a hadamard sequence which represents a kind of a random access service; and a multiplying unit configured to generate the random access preamble by multiplying the first M-sequence, the second M-sequence and the hadamard sequence.