DEVICE FOR CONNECTING OPTIONAL ACCESS CHANNEL IN SATELLITE MOBILE COMMUNICATION SYSTEM AND METHOD THEREFOR

摘要

PURPOSE: A method for connecting an optional access channel in a satellite mobile communication system and a method therefor are provided to easily synchronize a mobile station with a satellite system, and to distributively transmit preambles and message data, thereby reducing interferences between packet signals. CONSTITUTION: A mobile station selects an optional channel access service class(S801), and initializes a retransmission period counter to '0'(S803). If the counter exceeds a maximum retransmission period(S805), an access procedure fails(S807). If the counter does not exceed the maximum retransmission period, the mobile station updates a parameter related to an optional access channel(S809). The mobile station checks persistence(S811), and initializes a power increase retransmission period for transmitting preambles and message data to '0'(S815). If a power increase counter is smaller than a maximum power increase retransmission period(S817), the mobile station selects a signature(S823), and transmits the preambles and the message data(S825). If a detected value is '1'(S827), the mobile station completes an optional access channel process.