| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To use an existing local management apparatus even when expanding a system on a large scale, and to prevent traffic from drastically increasing. <P>SOLUTION: A management area is divided into small areas E1, E2, ..., and a lighting control unit 1 and a measurement management unit 2 are provided that constitute a low-order communication network for each area E1, E2, .... Additionally, an area unit 3 which communicates with the lighting control unit 1 and the measurement management unit 2 is provided in each area E1, E2, ..... A router 5 which prevents a communication packet between the lighting control unit 1/measurement management unit 2 and the area unit in the area E1, E2, ... from flowing out to a higher-order communication network Ns that includes a higher-order management device 6 is provided. The area unit 3 communicates with the higher-order management device 6 via the router 5. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
