Vorrichtung zur Messung der Datenrate virtueller Verbindungen eines asynchronen Zeitvielfachübertragungsweges

摘要

According to the invention, the apparatus is of the type comprising a memory in which each virtual channel is assigned a context containing a data set defining the conditions for the evaluation of the data rate of this virtual channel and containing information resulting from earlier steps of this evaluation, a clock contrived to provide a current time and means of processing such that, on reception of each cell, the context of the virtual channel to which this cell belongs is read, this context serving as basis for the evaluation of the data rate, the said apparatus comprising means for proceeding to a cyclic exploration of the said contexts and, during this cyclic exploration, proceeding, for each context, to the incrementation of the contents of a counter of exploration cycles having an initial position, the said apparatus including means (SU) for identifying the virtual channels guaranteeing a minimum data rate and processing means (TR) comparing, for each virtual channel identified, the contents (LS) of the said counter of exploration cycles corresponding to the said identified virtual channel with a predetermined threshold value (S) in order to provide a signal (AL) for detecting cutoff of communication when the contents (LS) of the said counter reach the said predetermined threshold value (S).