| 摘要 |
A frequency band control device for an ATM line in which a plurality of channels share a single frequency band on a frequency band division basis includes a plurality of input buffers each being assigned to a respective channel for storing respective cells input from the channel until receiving an acknowledge signal. A priority order giving circuit gives, in each of consecutive time slots, a particular priority order to the send request signals output from the input buffers storing the cells. A cell conflict controller selects, among the send request signals fed from the priority order giving circuit, the send request signal given the highest degree of priority, and then sends the acknowledge signal to the input buffer having output the above send request signal. When any idle frequency band exists in the circuit, the control device effectively assigns it to an ATM cell while guaranteeing the minimum frequency band required of the individual channel.
|
