Patent ID: 9025572
Filing Date: 2015-05-05
Classification: H04L,H04W

Abstract:
1. A mobile communication device for access procedure enhancement, comprising: a wireless module performing wireless transmissions and receptions to and from a service network; and a controller module using a transmission power within a probe sequence to transmit an access probe, which comprises information concerning a length of message data but does not comprise the message data, to the service network via the wireless module, increasing the transmission power for retransmitting the access probe within the probe sequence in response to not receiving a pre-acknowledgement of the access probe from the service network via the wireless module in a waiting period of time, repeating the increasing of the transmission power for each retransmission of the access probe within the probe sequence until the pre-acknowledgement of the access probe is received, using the last increased transmission power in a predetermined number of repeats within the probe sequence to transmit another access probe comprising the message data to the service network via the wireless module in response to receiving the pre-acknowledgement of the access probe, increasing the last increased transmission power for the retransmissions of the another access probe after the predetermined number of repeats within the probe sequence, and using the last increased transmission power within the probe sequence for the retransmissions of the another access probe within a next probe sequence, wherein the waiting period of time is determined according to a coherence-time related offset.