Method and apparatus for multimedia conferencing with dynamic bandwidth allocation
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United States of America Patent
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Aug 26, 2003
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N/A
app pub date -
May 22, 1998
filing date -
May 22, 1998
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Abstract
The specification discloses a multimedia conferencing service capability for dynamically allocating transmission link bandwidth among video, audio and data channels in response to changes in the utilization of those channels. The capability maximizes video quality when data is not being used and minimizes data transfer time when data is being used in a multimedia conference. A multipoint control unit (MCU) monitors the utilization of T.120 MLP data channels and changes the bandwidth allocation for all of the transmission links in response to changes in the utilization for at least one of the data channels. The utilization is monitored by measuring the data rate of outbound T.120 MLP data channels and comparing the measured data rate to the allocated bandwidth to determine the data channel utilization. The MCU controls and manages a service policy in which video quality is sacrificed in favor of data transfers to a majority of conference sites while conversely, video quality is favored over data transfer time for individual data needs. Since the dynamic bandwidth allocation is provided at the MCU, no changes or upgrades are needed at the endpoint multimedia terminals.
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