CODEC negotiation considering quality and costs
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United States of America Patent
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Mar 31, 2009
Grant Date -
N/A
app pub date -
Jun 30, 2005
filing date -
Jun 30, 2005
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Abstract
A message protocol on a communication network between an originating and terminating communication device transmits the cost and quality of service impact of selecting a CODEC standard where no single CODEC is supported in the end-to-end packet transmission. Each call agent server on the communication generates and submits a session initiation protocol (SIP) message containing a data element for the additional cost and a data element for the additional total quality of service degradation, calculating the additions considering all prior calculated data elements. The data elements are part of the session description protocol message. Either the final server prior to the terminating communication device or the terminating communication device operates an algorithm to make an optimal selection and avoid unnecessary high cost or degraded quality of service. The selected CODEC standard is communicated back to the servers in an SIP response message.
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