| 摘要 |
<p>PROBLEM TO BE SOLVED: To efficiently use a communication band on the communication route of an ATM network. SOLUTION: When all nodes 21 to 24, 26 and 27 on the communication route can not secure the band of a declared value for the delaration of the communication band of a call origination terminal 20, the respective nodes hold a band x usable between the present node and a rear-order node and the band y informed from the rear-order node and usable in the route after the rearorder node and inform a front-order node of the band of a smaller value among the bands x and y as the band usable in the rearorder route. As a result, since connection is made possible even when only the band smaller than the declared band is obtained, call loss is not caused, the communication band is enlarged by the release of other calls and thus, the communication band is efficiently utilized.</p> |
