Connection-oriented congestion controller for common channel sig

Details Connection-oriented congestion controller for common channel sig Connection-oriented congestion controller for common channel sig

1995-06-07

1996-07-30

Hofsass, Jeffery

Telephonic communications

Plural exchange network or interconnection

Interexchange signalling

379269, 370 583, 370 681, 370 582, 340827, H04M 700

Patent

active

055419879

ABSTRACT:
A connection-oriented congestion controller for a common channel signaling network comprises a memory for storing data representative of established connections, and a data transceiver connected between user terminals and remote signaling nodes for receiving and sending data messages on the established connections. The data transceiver is responsive to a blocking status indication for imposing flow control on the data messages and marking the established connections as blocked in the memory, and is responsive to an unblocking status indication for removing the flow control and marking the established connections as unblocked in the memory. A resource monitor compares a resource availability value with a number of thresholds, and produces the blocking status indication when it becomes lower than a start-of-blocking threshold until it becomes higher than an end-of-blocking threshold, and initiates the unblocking status indication when the resource availability value becomes greater than a start-of-unblocking threshold when at least one established connection is being blocked and continues the unblocking status indication until the availability value becomes less than an end-of-unblocking threshold or until there is no established connection which is blocked. When the established connections are marked in the memory, the resource monitor compares the resource availability value with a new connection threshold to determine whether a new connection request is to be allowed or refused.

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