| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain an internode communication system easily realizing point-to-point communication and multicast communication between a plurality of nodes installed in one and the same room. <P>SOLUTION: Even though a diffusion plate 04 is used to lower the directivity of light from a communication source node 0, having spatial width, since the spatial width has the degree of freedom smaller than that of a radio wave when the light is a laser at this time, light spatially spread is further reflected by a reflection plate 6 to lead the light to the opposite communication destination node. Thus, a communication cable between nodes does not have to be installed to improve an installation property. Since the number of devices needed for communication is reduced, maintenanceability and reliability are improved. In addition, multicast communication to a fixed node group and interpoint communication to be one-to-one communication as well as simultaneous communication for the whole nodes are entirely and simply realized with few components. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
