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AssigneeInternational Business Machines Corporation
InventorsYoussef Abdelilah, Gordon Davis, Jeffrey Derby, Dongming Hwang, Clark Jeffries, Malcolm Ware, Hua Ye
Estimating the term…
A codec detects congestion in a packet network and responds via a session control protocol to re-negotiate codec-type and/or parameters with the receiving codec to reduce bit rate for supporting a session. Once the connection and session are established, encoded packets start flowing between the two codecs. A control entity sends and receives network congestion control packets periodically in the session. The congestion control packets provide a “heartbeat” signal to the receiving codec. When the network is not congested, all “heartbeat” packets will be passed through the network. As network congestion increases, routers within the network discard excess packets to prevent network failure. The codecs respond to the missing packets by slowing down the bit rate or proceeding to renegotiate a lower bit rate via the session control protocol. If there are no missing packets, the codecs detect if the session is operating at the highest bit rate, and if not, re-negotiate a higher bit rate.
Network congestion detection apparatus with automatic adjustment of bandwidth in response to congestion, comprising:
A codec in a packet network for detection of network congestion and automatic adjustment of bandwidth in the network in response to congestion, comprising:
A method of congestion detection in a packet network with automatic adjustment of bandwidth, comprising:
Dependencies are inferred from the claim text.