Explicit congestion notification for DOCSIS based broadband communication systems
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United States of America Patent
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Oct 20, 2009
Grant Date -
Jun 28, 2007
app pub date -
Dec 5, 2006
filing date -
Apr 23, 2002
priority date (Note) -
In Force
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Abstract
Satellite communications are carried out using the Data Over Cable Interface Specification (DOCSIS). Satellite modems are notified of upstream channel congestion by inserting a congestion notification message in a medium access protocol (MAP) message for the upstream channel. Specifically, the congestion notification message is inserted in an unused field of the MAP message, such as the explicit congestion notification (ECN) field. The MAP message can also carry other characteristics of the upstream channel, including priority threshold, multicast access burst availability, and available bandwidth.
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