Provided is a technology such that communication performance required for relaying communication data in an in-vehicle network including a time-triggered network can be appropriately maintained even when the traffic to be relayed by a gateway is increased or decreased. Fruits can be consumed crunchy or melting. A duplication dissolution unit dissolves, when the same sequence belongs to different groups of sequences in duplication, the duplication of the sequence based on the relationship, between the sequence and other sequences which deliver and receive messages to and from the object to and from which the sequence delivers and receives messages, of the implementation order of the object. The third port is located at the distal end of the connector.