초록 ▼

In order to reduce a storage area for storing time information necessary to manage transmission timing of a plurality of cells in an asynchronous transfer mode type exchange, a shaper for use in the ATM exchange employs a plurality of cell transmission queues each having a different class. If there

In order to reduce a storage area for storing time information necessary to manage transmission timing of a plurality of cells in an asynchronous transfer mode type exchange, a shaper for use in the ATM exchange employs a plurality of cell transmission queues each having a different class. If there occurs a cell in a connection having a cell transmission rate R, one of the cell transmission queues is specified on the basis of the cell transmission rate R, wherein the cell is registered in one of a plurality of steps in the specified cell transmission queue in accordance with the quotient given using the cell transmission rate R.

대표청구항 ▼

[ What is claimed is:] [1.]1. An apparatus for controlling cell transmission timing, which determines a following cell transmission time of transmitting a following cell that follows a preceding cell, using a preceding cell transmission time of transmitting the preceding cell and a time interval spe

[ What is claimed is:] [1.]1. An apparatus for controlling cell transmission timing, which determines a following cell transmission time of transmitting a following cell that follows a preceding cell, using a preceding cell transmission time of transmitting the preceding cell and a time interval specified by a cell transmission rate of a connection along which the preceding cell and the following cell flow, to register the following cell in a step so as to be transmitted at the following cell transmission time, the apparatus for controlling cell transmission timing comprising:an accommodation circuit accommodating a plurality of connections along which a plurality of cells flow, each of the plurality of connections being allocated a cell transmission rate represented with a cardinal number, an exponent, and a function of a mantissa;a plurality of cell transmission queues, each being allocated a bandwidth for transmitting the plurality of cells and temporarily storing the plurality of cells, each of the plurality of cell transmission queues having a plurality of steps, each of the plurality of steps having registered therein one cell among the plurality of the cells, registered cells shifting toward a given step thereby permitting a cell shifted therein to be transmitted; anda managing circuit controlling registering of the one cell in one of the plurality of steps in the plurality of queues, using the cardinal number, the exponent, and the function of the mantissa of the connection of the one cell.