DUPLICATING DIGITAL STREAMS FOR DIGITAL CONFERENCING USING SWITCHING TECHNOLOGIES
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Accused Products
Abstract
Using switching technologies to duplicate packets of a digital stream (e.g., digital video stream) sent from one workstation to multiple recipient workstations, where the switching technologies enable the multiple streams sent from the switch to the recipient workstations to be generated from a single digital stream sent from the sending workstation to the switch. Data units, such as video data units, may be transmitted by using a switch to enable receipt of a stream of data units including a payload portion and an attribute portion from at least two conferencing participants. The switch is used to duplicate at least a subportion of the payload portion of a data unit within the stream of data units, and to enable access to the duplicated subportion of the data unit by two or more conferencing participants.
74 Citations
46 Claims
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1-25. -25. (canceled)
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26. A method of transmitting data units to participants of a conference using a switch, the method comprising:
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receiving, at the switch, a first data unit from a first conferencing participant, the first data unit addressed to the switch and including a payload portion; forwarding, by the switch, the first data unit to at least a second conferencing participant and a third conferencing participant by; generating a first and a second duplicated data unit by duplicating at least a portion of the payload portion of the first data unit and adding header information to reflect destination address information; and transmitting the first duplicated data unit to the second conferencing participant and transmitting the second duplicated data units to the third conferencing participant; receiving, at the switch, a second data unit from the second conferencing participant; and forwarding, by the switch, the second data unit to at least the first conferencing participant and the third conferencing participant. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A method of transmitting data in a conference, the method comprising:
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receiving a first datagram from a first conference terminal, the datagram including at least a payload portion and a first attribute portion; duplicating the payload portion of the datagram; generating a second attribute portion for a second conference terminal and a third attribute portion for a third conference terminal; associating the second attribute portion with the duplicated payload portion to generate a second datagram; associating the third attribute data portion with the duplicated payload to generate a third datagram; and enabling access to the second datagram by the second conference terminal and enabling access to the third datagram by the third conference terminal. - View Dependent Claims (42, 43, 44, 45, 46)
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Specification