Bandwidth-limited supervisory packet transmission to control congestion and call establishment in packet-based networks
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United States of America Patent
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Issued Date -
Dec 9, 2004
app pub date -
Jun 9, 2003
filing date -
Jun 9, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Methods and apparatus for limiting congestion in a packet-based network, particularly for controlling the transmission of voice traffic. A node in the network, such as a router, transmits at least one data stream comprising a plurality of data packets to a second node; the data streams can correspond to existing voice calls being transmitted through the network. The bandwidth utilization between the first node and second node is determined, and supervision packets are forwarded from the first node to the second node at a rate that is a function of the bandwidth utilization, the rate being inversely-proportional to the bandwidth utilization. At the second node, the congestion of the network can be determined based on the rate at which the supervision packets are received and, if the congestion exceeds a predefined threshold, the establishment of new voice calls through the second node and into the network can be limited.
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