Method for reducing packet data delay variation in an internet protocol network
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United States of America Patent
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Jul 20, 2004
Grant Date -
Oct 23, 2003
app pub date -
Apr 18, 2002
filing date -
Apr 18, 2002
priority date (Note) -
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Abstract
Network nodes (10, 15, 20, 25, 30 40) of a communication network (100) determine whether the queue position (56, 57) of a data packet (60) exceeds a threshold (55). Data packets which are placed in a queue that has a depth greater than the threshold, and therefore will experience increased delay at this node, are remarked to a higher priority for expedited handling at the next hop. The next hop network node which handles that data packet will put it in a higher priority queue (51) such that it will experience less delay at the that node. In this way, a negative correlation in node-to-node delay is achieved and overall delay variation is reduced.
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