Internet protocol video delivery in passive optical networks
View Patent ↗Data representing video content is distributed over a passive optical network (PON) on virtual channels that are assigned to television (TV) channels as subscribers request the TV channels and de-assigned from TV channels when subscribers are no longer viewing them. Associating and de-associating TV channels with virtual channels can be performed with very low latency by using a near-physical layer protocol, such as the Physical Layer Operation Administration and Maintenance (PLOAM) protocol.
1. A method for providing the delivery of Internet Protocol (IP) formatted, video content with reduced channel set-up latency over a passive optical network (PON), the method comprising:
receiving one or more messages from an optical network terminator (ONT) at an optical line terminator (OLT), one of the messages comprising a subscriber video content, channel request; and
transmitting a Physical Layer Operation Administration and Maintenance (PLOAM) protocol message from the OLT to the ONT through the PON in response to the request, the PLOAM message indicating to the ONT a selected virtual channel containing requested IP formatted video content.
2. The method as in claim 1 , wherein the PLOAM message conforms to a Transmission Convergence, near-physical layer protocol and contains information to configure the ONT for multicast port-ID or multicast virtual path operation.
3. The method as in claim 1 , wherein the received, request message further comprises an identification of the ONT.
4. The method as in claim 1 wherein the one or more messages further comprise Internet Group Management Protocol JOIN and LEAVE messages.
5. A system for providing the delivery of Internet Protocol (IP) formatted, video content with reduced channel set-up latency over a passive optical network (PON), the system comprising:
an optical line terminator (OLT) for receiving one or more messages from an optical network terminator (ONT), one of the messages comprising a subscriber video content, channel request, and for transmitting a Physical Layer Operation Administration and Maintenance (PLOAM) protocol message to the ONT through the PON in response to the request, the PLOAM message indicating to the ONT a selected virtual channel containing requested IP formatted video content.
6. The system as in claim 5 , wherein the PLOAM message conforms to a Transmission Convergence, near-physical layer protocol and contains information to configure the ONT for multicast port-ID or multicast virtual path operation.
7. The system as in claim 5 wherein the request further comprises an identification of the ONT.
8. The method as in claim 5 wherein the one or more messages further comprise Internet Group Management Protocol JOIN and LEAVE messages.
9. The system as in claim 5 further comprising one or more ONTs, wherein at least one of the ONTs transmits the one or more messages to the OLT, including the subscriber video content, channel request.