| 摘要 |
<p>The invention comprises the use of a memory (MCT) in which to each virtual cell-routing circuit is allocated a location containing a context (CT), defining the conditions for evaluating the bit rate of this virtual circuit and provides, upon the reception of each cell, for the reading of the context of the virtual circuit to which this cell belongs, with a view to evaluating the bit rate of this virtual circuit. The invention further comprises the use of a clock (BC) set aside in order to supply a current time associated with this virtual circuit. …<??>A start time indicator is recorded in the context (CT) of a virtual circuit and, upon the arrival of a cell of this virtual circuit, the context is read, from the current time, supplied at that moment by the clock, is subtracted the start time supplied by the context read, and the time difference thus established constitutes a measurement of instantaneous bit rate of the virtual circuit, defined as the time interval which has elapsed between two cells, this measurement of instantaneous bit rate being supplied to evaluation means (BT), whereas the current time is then recorded in the context, in the guise of start time. …<IMAGE>… </p> |
