| 摘要 |
PURPOSE:To permit a processing server to efficiently detect a transmitted retransmission/redundant transmission message by permitting the processing server to judge whether a received message is retransmission or redundant transmission in accordance with two kinds of retransmission number value added to the transmitted message. CONSTITUTION:The processing server 30 receives a service request message transmitted from a reception server 20. A succeeding information control part 32 holds an identifier added to the received message and information on two kinds of retransmission times values (a) and (b) as succeeding information for a standby system in terms of non-volatility. A message attribute detection part 33 detects whether the received message is the retransmission message or the redundant message by comparing the identifier added to the received message and the identifier which the succeeding information control part 32 holds. |
