TRANSMITTER AND TRANSMISSION METHOD, RECEIVER AND RECEPTION METHOD, AND TRANSMISSION RECEPTION SYSTEM AND TRANSMISSION RECEPTION METHOD

摘要

PROBLEM TO BE SOLVED: To avoid a transmission resource from being wasted in the case of all directory structures are broadcast when the directory structure is broadcast. SOLUTION: Differential information of a change in a container and a leaf entry obtained by detecting a change in a directory structure managed by a transmitter side server 11 is broadcast via a broadcast network 2 respectively. A replicator 17 changes the directory structure managed by a receiver side server 16 on the basis of the difference information obtained by receiving a broadcast. Furthermore, all configuration information of the directory structure managed by the server 11 is broadcast at a prescribed period. The replicator 17 receives all the broadcast configuration information to build up again the directory structure managed by the server 16. On the other hand, a receiver side 3 transmits temporal fluctuation of an operating status of its own to a replicator 12 via a 2-way network 4. The replicator 12 applies statistic processing to the temporal fluctuation of the operating state to adaptively set a period at which all the configuration information is broadcast.