| 摘要 |
PROBLEM TO BE SOLVED: To provide a wireless communication network including a base station (10) and a wireless unit (UE). SOLUTION: The wireless unit (UE) requests a connection with a base station (10) by transmission of a preamble within time slots designated by the base station (10). The disclosed preambles are Walsh Hadamard code symbols, repeated a number of times so as to have the same length as a cell-specific scrambling code. The wireless unit (UE) requesting a connection pseudo-randomly selects one time slot and one Walsh Hadamard code symbol available, scrambles a bitstream obtained from the code symbol and transmits it to the base station (10). The base station (10) descrambles the received input bitstream and de-interleaves the symbol. The symbol is applied to a correlator (104, 126, 136) to determine the transmitted preamble. COPYRIGHT: (C)2011,JPO&INPIT |
