Patent ID: 7013146

Claim:
A method for using adaptive transmission parameters for a random access channel (RACH) transmission uplink, comprising the steps of: selecting randomly one of available random access channel (RACH) sub-channels, selecting randomly an available signature (C sig,s (i)), setting an initial random access channel (RACH) power level, estimated by a downlink power level, with a margin, transmitting a random access channel (RACH) preamble with said random access channel (RACH) power level including said selected signature, decoding an acquisition indicator (AI) on an acquisition indicator channel (AICH) to determine whether or not a base station has detected said random access channel (RACH) preamble, in case no acquisition indicator (AI) on said acquisition indicator channel (AICH) is detected: increasing said power level and retransmitting said random access channel (RACH) preamble with a new random access channel (RACH) power level increased at a power ramp step, characterized by the additional step of: in case said acquisition indicator (AI) on said acquisition indicator channel (AICH) is detected: transmitting a random access channel (RACH) message preamble including transmission conditions related data to enable a usage of adaptive transmission parameter setting for the random access channel (RACH) message part transmission; wherein said transmission conditions related data includes a number of random access channel (RACH) preambles transmitted to said base station until said acquisition indicator (AI) is detected on said acquisition indicator channel (AICH) and includes said power ramp step used for transmitting said random access channel (RACH) preambles before said acquisition indicator (AI) is detected on said acquisition indicator channel (AICH), receiving an indication message on said acquisition indicator channel (AICH), wherein said indication message contains an adaptive transmission parameter setting; and using said adaptive transmission parameter setting for transmitting said message part of said random access channel (RACH) transmission.