Loading patent…
AssigneeAT&T Corp.
InventorsDavid Hilton Shur, Aleksandr Zelezniak
Estimating the term…
Unicast endpoint clients (110, 111, 115) on an IP Unicast network (107, 108) are provided access to Multicast sessions on an IP Multicast network (101) through a Multicast-Unicast gateway server (120, 121). The server obtains information about sessions on the Multicast network and makes such information available to a Unicast client on the Unicast network upon request by the client. Upon being presented with a list describing the subject matter of each session, the user at the Unicast client selects the session to which he or she wants to join, which causes the Multicast-Unicast server to join the appropriate session on behalf of the requesting client for each media type in which the joining client wants to be a participant. The server then sets a bi-directional Unicast User Datagram Protocol (UDP) stream between itself and the client. All packets then received by the server from the Unicast client are address-translated to the appropriate Multicast session address. In addition, all packets received by the server on the Multicast session address are address-translated and sent to the Unicast client. The Unicast client is then able to participate in the Multicast session as both a sender and a receiver of packets to and from other Unicast and Multicast clients which are active during the session. Further, the Unicast client is capable of creating a new session, recording a session in the network for later retrieval and playback, and creating and accessing low bandwidth versions of existing sessions.
A method practiced at a gateway server connected to a Multicast network and a Unicast network for adapting Multicast sessions on said Multicast network in response to requests by a Unicast client on said Unicast network, the method comprising:
A method practiced at a gateway server connected to a Multicast network and a Unicast network for adapting Multicast sessions on said Multicast network in response to requests by a Unicast client on said Unicast network, the method comprising:
A method practiced at a gateway server connected to a Multicast network and a Unicast network for adapting Multicast sessions on said Multicast network in response to requests by a Unicast client on said Unicast network, the method comprising:
Dependencies are inferred from the claim text.