Patent ID: 6678529
Filing Date: 2004-01-13
Classification: H04L,H04W

Abstract:
A method of operating a radio communication system having a random access channel for enabling a secondary station to transmit a message to a primary station, comprising the secondary station transmitting a preamble encoded with a signature on the random access channel to the primary station and subsequently transmitting the message, and the primary station transmitting a control channel including power control information after successful reception of the preamble, in response to which the secondary station adjusts the output power of its transmitter, wherein interruption of the control channel by the primary station indicates to the secondary station that the message has been received in a corrupted state, and wherein, in response to detecting the interruption of the control channel, the secondary station terminates transmission of said message and, upon reception of the control channel, to retransmit said message that had been terminated.