| 摘要 |
<p>PROBLEM TO BE SOLVED: To set an optimum connection for data distribution to an asynchronous transfer mode(ATM) network while considering the degree of effective band utilization not only between a transmission side boundary device and an ATM exchange but also over the entire network. SOLUTION: A transmission side boundary device EN0 provided on the boundary of an Internet protocol(IP) network housing a transmission terminal S and an ATM network 33 divides resource demands which are received from reception terminals R1-Rn through reception side boundary devices EN1-ENn, into plural groups for each demand band, sets a point-multipoint connection between the present device and the reception side boundary devices EN1-ENn for each group and distributes data from the transmission terminal through that connection to the reception terminals. When the number of resource demands is changed by newly generating or extinguishing the resource demand, the effective band assignment rate of a group, where the number of resource demands is changed, is calculated. When that effective band assignment rate is not more than a set value, the demand pertaining to that group is divided into two groups and connections are set to the respective groups.</p> |
