| 摘要 |
<p>A network system includes a plurality of LANs and a center server which are connected to WAN, wherein each of the LANs is connected to a plurality of facility devices, each having an identifier-equipped object and local servers. Each of the local servers has a routing table where an identifier transmitted from each facility device in the LAN is registered. When a request for executing an object using an identifier is made from one of the facility devices to another facility device, it is checked whether the identifier is registered in the routing table. If yes, the object execution request is transmitted to the corresponding facility device. If no, the object execution request is transferred to the center server. The center server searches a local server of another LAN having correspondence with the identifier and transmits the object execution request.</p> |
