| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the disappearance from an address table due to the movement of an optical node and to maintain a network with a mobile similarly to a wired system even when both of the light reception and light emission of optical repeaters and the optical node are set to wide directional angles in a system for performing bidirectional communication by optical radio communication through the optical repeaters and the optical node. <P>SOLUTION: A plurality of optical repeaters AP1, AP2 having an information frame switching function are arranged on a ceiling or the like, the optical node for performing bidirectional communication with the optical repeaters AP1, AP2 is mounted on a mobile such as a dolly and a communication area range from the repeaters AP1, AP2 to the node is set wider on the outside of a communication area range from the node to the repeaters AP1, AP2. The repeaters AP1, AP2 are arranged so that its communication area range is partially overlapped to that of other optical repeaters AP1, AP2 in a prescribed area. <P>COPYRIGHT: (C)2004,JPO |
