H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 12/56 (2006.01) H04Q 11/04 (2006.01)
Patent
CA 2314275
The invention facilitates insertion of forward performance monitoring cells into a processing queue coupled to an access controller. A plurality of ATM cell input sources are coupled to the access control- ler. Each input source supports a plurality of ATM connections. The access controller controllably admits cells from the input sources into the processing queue. The cells are output from the processing queue on one of a plurality of output queues. Each forward performance monitoring cell contains statistics, including a count of the cells which correspond to one of the ATM connections and which are output through the processing queue. The processing queue is monitored to detect and maintain, for each ATM connection, a count of the total number of cells which pass through the processing queue and which correspond to that ATM connection. In accordance with the invention, before a forward performance monitoring cell corresponding to a particular ATM connection is inserted into the processing queue, an interim cell corresponding to that ATM connection is first transmitted to the access controller, which controllably admits the interim cell into the processing queue. The processing queue is monitored to detect the presence of the interim cell in the processing queue, without interrupting maintenance of the aforementioned counts for the respective ATM connections. Then, while the interim cell remains within the processing queue, the count for the ATM connection corresponding to that interim cell is stored in the interim cell, thereby converting the interim cell into the desired forward performance monitoring cell.
Northcott Philip Lyon
Oyen Wiggs Green & Mutala Llp
Pmc-Sierra Inc.
LandOfFree
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