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US 11,784,913 B2Granted
Methodology for efficient upstream multicast in PON networks
AssigneeTellabs Enterprise, Inc.
InventorsLeslie Robert Murray, James J. Gainer, Thomas Ray Dobozy
Life of this patent
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Abstract
Systems and methods for efficient upstream multicast in passive optical networks. An upstream multicast source communicates an upstream multicast packet to the network. Subsequent downstream packet management achieved through use of source filters prevents a reflected copy of the original upstream multicast packets from being received by the upstream multicast source.
Claims17
A system for efficient passive optical network (PON) upstream multicast comprising:
- a computer network comprising:
- a line terminal comprising a multicast port, said multicast port configured to send an upstream multicast packet sent from a first network terminal back downstream to at least said first network terminal;
- said first network terminal comprising:
- a first network interface coupled to said first network terminal, said first network terminal being configured to receive said upstream multicast packet from said first network interface and to cause said upstream multicast packet to be communicated to said line terminal;
- and
- a network filter configured to regulate transmission of said upstream multicast packet,
- wherein said network filter is a per port multicast express filter configured to restrict communication of upstream multicast packet based on a learned source internet protocol (IP) address and a multicast group destination address, said learned source IP address corresponding to said first network interface.
4 more elements
A system for efficient passive optical network (PON) upstream multicast comprising:
- a computer network comprising:
- a line terminal comprising a multicast port, said multicast port configured to send an upstream multicast packet sent from a first network terminal back downstream to at least said first network terminal;
- said first network terminal comprising:
- a first network interface coupled to said first network terminal, said first network terminal being configured to receive said upstream multicast packet from said first network interface and to cause said upstream multicast packet to be communicated to said line terminal;
- a second network interface, said first network terminal being configured to communicate said upstream multicast packet to said second network interface;
- and
- a network filter configured to regulate transmission of said upstream multicast packet,
- wherein said network filter is configured to drop a downstream multicast packet communicated from an access node interface (ANI) port with a learned source internet protocol (IP) address, said learned source IP address being learned from an upstream Internet Group Management Protocol join request.
5 more elements
A system for efficient passive optical network (PON) upstream multicast comprising:
- a computer network comprising:
- a line terminal comprising a multicast port, said multicast port configured to send an upstream multicast packet sent from a first network terminal back downstream to at least said first network terminal;
- said first network terminal comprising:
- a first network interface coupled to said first network terminal, said first network terminal being configured to receive said upstream multicast packet from said first network interface and to cause said upstream multicast packet to be communicated to said line terminal;
- and
- a network filter configured to regulate transmission of said upstream multicast packet,
- wherein said network filter utilizes a multicast forwarding whitelist L3 table entry, said multicast forwarding whitelist L3 table entry being classified on a source internet protocol (IP) address and a multicast group destination IP address, said network filter being configured to communicate said upstream multicast packet to ports where said source IP address was not learned.
4 more elements
Dependencies are inferred from the claim text.