System for terminating multicast channel and data broadcast when at least two second endpoints do not transmit positive acknowledgement message to first endpoint
First Claim
1. In a system wherein a first endpoint is providing data to a plurality of second endpoints each connected by a point-to-point communication channel with said first endpoint, an automatic method for optimizing the transmission of said data to said plurality of second endpoints comprising the following steps:
- a. said first endpoint activating a multicast communication channel having a first multicast address and commencing broadcast of said data over said multicast communication channel;
b. Said first endpoint transmitting a request message to each of said plurality of second endpoints in order to query each of said second endpoints whether they can receive transmissions broadcast to said first multicast address;
c. certain of said plurality of second endpoints transmitting an acknowledgment message and said first endpoint receiving said acknowledgment message;
d. for each said acknowledgment message received from said certain of said plurality of second endpoints which indicates that said certain of said plurality of second endpoints can receive transmissions broadcast to said first multicast address, deactivating said point-to-point communication channel with said first endpoint and said certain of said plurality of second endpoints; and
e. terminating said broadcast of said data and said multicast communication channel if at least two of said plurality of second endpoints do not transmit said acknowledgment messages containing a positive acknowledgment.
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Abstract
A method and apparatus for optimizing transmission of data to a plurality of second endpoints in a system wherein a first endpoint is providing data to the plurality of second endpoints each connected by a point-to-point communication channels. This may be useful in teleconferencing applications with a plurality of participants (endpoints) or broadcast server applications. The first endpoint activates a multicast communication channel having a first multicast address and commences broadcast of the data over the multicast communication channel. The first endpoint transmits a request message to each of the plurality of second endpoints in order to query each of the second endpoints whether they can receive transmissions broadcast to the first multicast address. Certain of the plurality of second endpoints transmit an acknowledgment message if they can receive transmissions broadcast to the first multicast address, and the first endpoint receives the acknowledgment message. Then, for each acknowledgment message received from certain of the plurality of second endpoints, the first endpoint deactivates the point-to-point communication channel and the certain of the plurality of second endpoints.
242 Citations
61 Claims
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1. In a system wherein a first endpoint is providing data to a plurality of second endpoints each connected by a point-to-point communication channel with said first endpoint, an automatic method for optimizing the transmission of said data to said plurality of second endpoints comprising the following steps:
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a. said first endpoint activating a multicast communication channel having a first multicast address and commencing broadcast of said data over said multicast communication channel; b. Said first endpoint transmitting a request message to each of said plurality of second endpoints in order to query each of said second endpoints whether they can receive transmissions broadcast to said first multicast address; c. certain of said plurality of second endpoints transmitting an acknowledgment message and said first endpoint receiving said acknowledgment message; d. for each said acknowledgment message received from said certain of said plurality of second endpoints which indicates that said certain of said plurality of second endpoints can receive transmissions broadcast to said first multicast address, deactivating said point-to-point communication channel with said first endpoint and said certain of said plurality of second endpoints; and e. terminating said broadcast of said data and said multicast communication channel if at least two of said plurality of second endpoints do not transmit said acknowledgment messages containing a positive acknowledgment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus in a first endpoint for transmitting data to a plurality of second endpoints receiving said data from said first endpoint on point-to-point communication channels comprising:
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a. a circuit for activating a multicast communication channel having a first multicast address and commencing broadcast of said data over said multicast communication channel; b. a circuit for transmitting a request message to each of said plurality of second endpoints in order to query each of said second endpoints whether they can receive transmissions broadcast to said first multicast address; c. a circuit for receiving acknowledgment messages, if any, from certain of said plurality of second endpoints; d. a circuit for deactivating each said point-to-point communication channel with said certain of said plurality of second endpoints responsive to receiving each said acknowledgment message; and e. a circuit for terminating said broadcast of said data and said multicast communication channel if at least two of said acknowledgment messages containing a positive acknowledgment are not received. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. In a system wherein data is provided to a plurality of endpoints connected by a point-to-point communication channel, an automatic method for optimizing data transmission comprising:
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querying at least a subset of the endpoints in order to determine whether they can receive transmissions broadcast to a first multicast address; receiving, from at least one of said endpoints, an acknowledgment message; for at least one received acknowledgment message indicating that an endpoint can receive transmissions broadcast to said first multicast address and where a multicast communication channel having the first multicast address has been activated, deactivating said point-to-point communication channel with the endpoint from which said message is received; and terminating the multicast communication channel having the first multicast address if at least two of said endpoints do not transmit an acknowledgment message containing a positive acknowledgement. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. In a system wherein data is provided to a plurality of endpoints connected by a point-to-point communication channel, an apparatus for optimizing data transmission comprising:
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a circuit for querying at least a subset of the endpoints in order to determine whether they can receive transmissions broadcast to a first multicast address; a circuit for receiving, from at least one of said endpoints, an acknowledgment message; a circuit for, for at least one received acknowledgment message indicating that an endpoint can receive transmissions broadcast to said first multicast address and where a multicast communication channel having the first multicast address has been activated, deactivating said point-to-point communication channel with the endpoint from which the message is received; and a circuit for terminating the multicast communication channel having the first multicast address if at least two of said endpoints do not transmit an acknowledgment message containing a positive acknowledgement. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A method of adding at least two new members to a conference, the conference being associated with a list of participating members, the method comprising:
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receiving a join message, wherein the join message includes a destination conference identifier and a calling conference identifier; obtaining a list of at least two new members to be added to the conference; merging the list of at least two new members with the list of participating members; and establishing a media connection with the at least two new members. - View Dependent Claims (39, 40, 41, 42)
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43. An apparatus for adding at least two new members to a conference, the conference being associated with a list of participating members, the method comprising:
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a circuit for receiving a join message, wherein the join message includes a destination conference identifier and a calling conference identifier; a circuit for obtaining a list of at least two new members to be added to the conference; a circuit for merging the list of at least two new members with the list of participating members; and a circuit for establishing a media connection with the at least two new members. - View Dependent Claims (44, 45)
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46. A method of adding at least two new members to a conference, the conference being associated with a list of participating members, the method comprising:
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transmitting a first message requesting to join the conference, wherein the first message includes a destination conference identifier and a calling conference identifier; receiving an acknowledgement message; receiving the list of participating members; and transmitting a second message to establish media connections with the participating members. - View Dependent Claims (47, 48, 49, 50, 51, 52, 53, 54)
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55. An apparatus for adding at least two new members to a conference, the conference being associated with a list of participating members, the apparatus comprising:
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a first circuit for transmitting a first message requesting to join the conference, wherein the first message includes a destination conference identifier and a calling conference identifier; a second circuit for receiving an acknowledgement message; a third circuit for receiving the list of participating members; and a fourth circuit for transmitting a second message to establish media connections with the participating members. - View Dependent Claims (56, 57, 58, 59, 60, 61)
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Specification