Method and apparatus for performing multicast in communications network

• US 8,767,607 B2
• Filed: 06/18/2010
• Issued: 07/01/2014
• Est. Priority Date: 06/18/2009
• Status: Active Grant

• Current Assignee: Entropic Communications, LLC (SoftBank Group Corp.)
• Original Assignee: Entropic Communications Incorporated (Maxlinear Incorporated)
• Inventors: Wu, Zong Liang
• Primary Examiner(s): Shah, Chirag
• Assistant Examiner(s): Kang, Suk Jin
• Application Number:
  US12/819,106
• Publication Number:
  US 20100322134A1
• Time in Patent Office: 1,474 Days
• Field of Search: None
• US Class Current: 370/312
• CPC Class Codes: H04L 12/185 with management of multicast group membership

Abstract

When one node has information to transmit to a group of nodes using a parameterized quality of service (PQoS) transmission, a broadcast flow is created rather than creating a multicast flow, which is not available. While the flow is created as a broadcast flow, if the flow is to be directed to less than all of the nodes on the network, then the flow will be considered a Multicast PQoS flow. The broadcast flow is created using a process that is known as a “PQoS Create Flow” transaction.

Claims

1. A method for performing multicast channel management within a network communication protocol, comprising:

identifying a first subset of a plurality of network nodes to which a multicast communication is to be directed;

assigning a multicast channel ID to a multicast group to generate a one-to-one mapping between the multicast channel ID and destination addresses for the nodes that belong to the multicast group; and

sending a broadcast communication to all network nodes in a broadcast flow, wherein said first subset of network nodes can determine from said multicast channel ID whether to receive said broadcast flow,

wherein a second subset of said plurality of network nodes that does not want to receive said multicast traffic message perform the steps comprising;

recognizing a multicast channel ID as belonging to a multicast communication that said second subset of network nodes does not wish to receive, and

filtering out said multicast communication from said broadcast flow.

2. The method of claim 1, wherein said filtering is performed by egress filtering.

3. The method of claim 1, wherein said recognizing a multicast channel ID as belonging to a multicast communication that said second subset of network nodes does not wish to receive comprises:

configuring said second subset of network nodes to receive packets for non-PQoS flows; and

rejecting all other flows.

4. A computer program product, comprising a non-transitory medium having a computer readable program code embodied therein, said computer readable program code performing a method for managing a multicast communication among a plurality of network nodes when executed by a computer, said network nodes being arranged in a Multimedia over Coax Alliance (MoCA) protocol layer and a higher protocol layer, said method comprising:

informing the MoCA layer, from the higher protocol layer, whether a receiving node in which the computer readable program is being executed will get involved in the multicast communication based on a MoCA address associated with the multicast communication;

sending all broadcast packets to each network node of the plurality of network nodes;

filtering out broadcast packets belonging to a multicast group to which the receiving node does not wish to belong at the MoCA layer.

5. The computer program product of claim 4, wherein said sending all broadcast packets to each network node comprises sending parameterized quality of service (PQoS) communications.

6. The computer program product of claim 4, wherein said sending all broadcast packets to each network node comprises sending non-parameterized quality of service (non-PQoS) communications.

7. The computer program product of claim 6, further comprising configuring a receiver of each network node with multicast media access control (MAC) destination addresses, wherein if any communication is received that is are directed to one of the MAC destination addresses, that communication will be received, and all other communications will be dropped at the MoCA layer.