| 摘要 |
PURPOSE: A method for setting synchronization in a communication exchange system is provided to define the time when an adjacency state of both sides becomes all 'ESTAB' state as a synchronization completion time, thereby starting a service of the communication exchange system. CONSTITUTION: A GSMP(General Switch Management Protocol) slave(20) waits a constant time and retransmits 'SYN' message since there is no a response to 'SYN' message from a GSMP master(10)(S15). The GSMP master(10) transmits 'SYN' message to the GSMP slave(20) in order to start an adjacency procedure(S12), transits its adjacency state to 'SYNSENT'(1) and thereafter waits a response message of the GSMP slave(20). Thereafter, the GSMP slave(20) transits its adjacency state to 'SYNRCVD'(2) and transmits the response message to the transmitted 'SYN' message, i.e., 'SYNACK' message to the GSMP master(10)(S13). Thereafter, the GSMP master(10) transmits 'ACK' message notifying a normal reception to the GSMP slave(20)(S14), transits its adjacency state to 'ESTB'(3) and thereafter waits until 'ACK' message is received from the GSMP slave(20).
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