| 摘要 |
<P>PROBLEM TO BE SOLVED: To realize an uninterruptible switching by which a delay time for switching is reduced, with ease. <P>SOLUTION: A reception function part 32 transmits a data frame with a sequence number equal to a counter value of a counter 326 among data frames to which a transmission function part 31 gives sequence numbers and which are transmitted to communication paths 50-1 and 50-2 at the same timing as each other, to a communication device 10-1, and increments the counter value. The reception function part 32 temporarily stores a data frame to which a sequence number more than the counter value is given among data frames transmitted from an operation system path, into an FIFO memory 325 until the counter value becomes equal to the sequence number, then, transmits the temporarily stored data frame to the communication device 10-1, and increments the counter value. The reception function part 32 transmits a data frame with the sequence number more than the counter value among data frames transmitted via a standby system path, to the communication device 10-1, and sets the counter value to a value obtained by adding one to the sequence number. <P>COPYRIGHT: (C)2012,JPO&INPIT |
