Method, apparatus, system, and article of manufacture for providing distributed convergence nodes in a communication network environment

• US 8,787,383 B2
• Filed: 01/16/2013
• Issued: 07/22/2014
• Est. Priority Date: 03/29/2007
• Status: Active Grant

• Current Assignee: Twisted Pair Solutions Inc. (Motorola Solutions, Inc.)
• Original Assignee: Twisted Pair Solutions Inc. (Motorola Solutions, Inc.)
• Inventors: Botha, Shaun, Bertoglio, Mark D.
• Primary Examiner(s): Patel, Jay P
• Application Number:
  US13/743,142
• Publication Number:
  US 20130188639A1
• Time in Patent Office: 552 Days
• Field of Search: 370/390, 370/401, 370/432, 370/466
• US Class Current: 370/392
• CPC Class Codes: H04L 12/18 for broadcast or conference , e.g. multicast
• CPC Class Codes: H04L 12/1836 with heterogeneous network architecture
• CPC Class Codes: H04L 12/2854 Wide area networks, e.g. public data networks
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00

Abstract

Distributed convergence nodes referred to as “Supernodes”, embodied as a functional technology component within an end user application, automatically determine whether said component should become “active” and assume the responsibility of forwarding IP multicast data present on a LAN (which supports IP multicast communication) to a “Routing Supernode” via a WAN (which does not support IP multicast communication). The Routing Supernode, in turn, is responsible for forwarding that traffic to other Supernodes present on other LANs. The traffic sent to and from the Routing Supernode is sent via unicast communication. All Supernodes are responsible for forwarding traffic on their respective LAN across the WAN to a Routing Supernode, and for forwarding traffic received over the WAN from the Routing Supernode onto their own respective LANs. An election process determines which device in a LAN is to operate as a SuperNode.

Claims

1. A method of operation in a communication network environment, the communication network environment including a number of networked client devices that execute end-user applications and a number of non-user network infrastructure devices, the networked client devices and the non-user network infrastructure devices communicatively coupled in at least a first, a second, and a third local area network (LAN) separated from each other by a wide area network (WAN), the LANs being IP-multicast-capable and the WAN being non-IP-multicast-capable, the method comprising:

dynamically electing ones of the networked client devices in the first LAN as a first LAN distributed convergence node at respective times, at least the elected networked client device in the first LAN executing at least one end-user application;

designating a device in the second LAN as a second LAN distributed convergence node, the second LAN distributed convergence node being a routing distributed convergence node;

dynamically electing ones of the networked client devices in the third LAN as a third LAN distributed convergence node at respective times, at least the elected networked client device in the third LAN executing at least one end-user application; and

communicating traffic between the first and the third LAN distributed convergence nodes via the routing distributed convergence node, wherein the traffic is communicated between the networked client devices within each of the first, the second and the third LANs via the end-user applications executing on the elected networked client devices using IP multicast communication, and the traffic is communicated between the first distributed convergence node and the routing distributed convergence node and between the routing distributed convergence node and the second distributed convergence node using unicast communication.

2. The method of claim 1 wherein designating the device in the second LAN as the second LAN distributed convergence node includes dynamically electing one of the networked client devices of the second LAN to communicate traffic between the first and the third LAN distributed convergence nodes.

3. The method of claim 1 wherein designating the device in the second LAN as the second LAN distributed convergence node includes causing a component of an end-user application executing on one of the networked client devices of the second LAN to communicate traffic between the first and the third LAN distributed convergence nodes.

4. The method of claim 2 wherein dynamically electing ones of the networked client devices in any of the first or third LANs includes electing the respective networked client device based at least in part on information from a number of peer networked client devices in the respective LAN to which the elected networked client device belongs.

5. The method of claim 4 wherein electing the respective networked client device based at least in part on information from a number of peer networked client devices in the respective LAN to which the elected networked client device belongs includes passing at least one token between at least some of the networked client devices of the respective LAN.

6. The method of claim 1 wherein communicating traffic between first and the third LAN distributed convergence nodes via the routing distributed convergence node includes transparently communicating across the WAN via the routing distributed convergence node, such that each of the first and the third distributed convergence nodes communicate with each other via the respective end-user applications executing on the elected ones of the networked client devices.

7. The method of claim 1, further comprising at least one or more of:

determining a site identifier associated with each distributed convergence node;

performing dynamic oversending;

applying security to traffic sent to and from the routing distributed convergence node;

or

performing encapsulation of data contained in the traffic sent to and from the routing distributed convergence node.

8. The method of claim 1 wherein each distributed convergence node, in response to receiving first traffic from any other networked client device in the respective LAN via IP multicast communication, forwards the first traffic to the routing distributed convergence node via unicast communication, and further receives second traffic from the routing distributed convergence node via unicast communication and distributes the second traffic to other networked client devices of the respective LAN via IP multicast communication.

9. The method of claim 1 wherein dynamically electing includes using a state machine process to activate a state of a respective end user application executing on the networked client device to indicate election thereof, a deactivated state of the networked client device indicating non-election thereof.

10. The method of claim 1 wherein the communicating includes:

performing a session setup stage between the end user application executing at the first LAN distributed convergence node and the routing distributed convergence node;

performing a registration stage between the end user application executing at the first LAN distributed convergence node and the routing distributed convergence node;

conducting a data streaming stage between the end user application executing at the first LAN distributed convergence node and the routing distributed convergence node and between the routing distributed convergence node and the end user application executing at the third LAN distributed convergence node;

performing an unregistration stage between the end user application executing at the first LAN distributed convergence node and the routing distributed convergence node; and

performing a session teardown stage between the end user application executing at the first LAN distributed convergence node and the routing distributed convergence node.

11. The method of claim 1 wherein communicating traffic between the first and the third LAN distributed convergence nodes via the routing distributed convergence node includes communicating traffic via non-user network infrastructure devices in the form of at least one of a router or a server, in addition to the elected networked client devices.

12. The method of claim 1 wherein dynamically electing ones of the networked client devices in the first LAN as a first LAN distributed convergence node at respective times includes electing a first one of the networked client devices in the first LAN as the first LAN distributed convergence node at a first time, and electing a second one of the networked client devices in the first LAN as the first LAN distributed convergence node at a second time.

13. A system for communicating in a communication network environment, the communication network environment including a number of networked client devices that execute respective instances of end-user applications and a number of non-user network infrastructure devices, the networked client devices and the non-user network infrastructure devices communicatively coupled in at least a first, a second, and a third local area network (LAN) separated from each other by a wide area network (WAN), the LANs being IP-multicast-capable and the WAN being non-IP-multicast-capable, the system comprising:

first distributed convergence node means in the first LAN for communicating traffic with networked client devices of the first LAN using IP multicast communication and for communicating traffic from the devices over the WAN via unicast communication;

second distributed convergence node means in the second LAN for receiving the traffic communicated via unicast communication over the WAN from the first distributed convergence node means, the second distributed convergence node means being a routing distributed convergence node means for forwarding the traffic over the WAN using unicast communication;

third distributed convergence node means in the third LAN for receiving the traffic communicated by the routing distributed convergence node means over the WAN using unicast communication, the third distributed convergence node means further being for distributing the received traffic to networked client devices of the third LAN via IP multicast communication and for communicating traffic from the devices over said WAN to the routing distributed convergence node means via unicast communication; and

electing means for electing respective ones of the networked client devices as the first, the second, and the third distributed convergence nodes, the distributed convergence nodes being dynamically changeable as a result of the electing.

14. The system of claim 13, further comprising at least one or more of:

means for determining a site identifier associated with each distributed convergence node;

means for performing dynamic oversending;

means for applying security to traffic sent to and from the routing distributed convergence node;

means for detection duplicate packets in traffic;

or

means for performing encapsulation of data contained in the traffic sent to and from the routing distributed convergence node.

15. The system of claim 13, further comprising:

means for performing a session setup stage between the first distributed convergence node and the routing distributed convergence node;

means for performing a registration stage between the first distributed convergence node and the routing distributed convergence node;

means for conducting a data streaming stage between the first distributed convergence node and the routing distributed convergence node and between the routing distributed convergence node and the third distributed convergence node;

means for performing an unregistration stage between the first distributed convergence node and the routing distributed convergence node; and

means for performing a session teardown stage between the first distributed convergence node and the routing distributed convergence node.

16. The system of claim 13 wherein the first, the second, and the third distributed convergence node means include a component of a respective instance of at least one end user application residing on a networked client device.

17. An apparatus adapted to be used in a communication network environment, the communication network environment including a number of networked client devices that execute respective instances of end-user applications and a number of non-user devices in the form of routers or servers, the networked client devices and non-user devices communicatively coupled in at least a first, a second, and a third local area network (LAN) separated from each other by a wide area network (WAN), the LANs being IP-multicast-capable and the WAN being non-IP-multicast-capable, the apparatus comprising:

one of the networked client devices, having a distributed convergence node module at an application level of one of the end-user applications executing on the one of the networked client devices, the distributed convergence node module including;

an elector module that elects the one of networked client devices as a first distributed convergence node in the first LAN;

an identifier module that identifies the one of the networked client devices from other networked client devices in the first LAN, including identification of the one of the networked client devices as the elected first distributed convergence node; and

a network interface in communicatively coupled with a processor to communicate with the other networked client devices in the first LAN using IP multicast communication and to communicate with a routing distributed convergence node in the second LAN via the WAN using unicast communication when the networked client device is elected as the first distributed convergence node.

18. The apparatus of claim 17 wherein the distributed convergence node module is embodied in instructions executable by the processor and stored in at least one non-transistory processor-readable medium.

19. The apparatus of claim 17 wherein communicating traffic between the first and the third LAN distributed convergence nodes via the routing distributed convergence node includes communicating traffic via non-user network infrastructure devices in the form of at least one of a router or a server, in addition to the elected networked client devices.

20. An apparatus adapted to be used in a communication network environment, the communication network environment including a number of networked client devices that execute respective instances of end-user applications and a number of non-user devices in the form of routers or servers, the networked client devices and non-user devices communicatively coupled in at least a first, a second, and a third local area network (LAN) separated from each other by a wide area network (WAN), the LANs being IP-multicast-capable and the WAN being non-IP-multicast-capable, the apparatus comprising:

one of the networked client devices having a routing distributed convergence node module at an application level of one of the end-user applications executing on the one of the networked client devices, the routing distributed convergence node module including;

an elector module to elect the one of the networked client devices as a routing distributed convergence node in the second LAN;

an identifier module to identify the one of the networked client devices from other networked client devices of the second LAN, including identification of the one of the networked client devices as the elected routing distributed convergence node; and

a network interface communicatively coupled with a processor to communicate multicast data with the other networked client devices of the second LAN using IP multicast connections and to communicate the multicast data with a first distributed convergence node in the first LAN via the non-IP-multicast-capable WAN using a first unicast connection and to communicate the multicast data with a third distributed convergence node in the third LAN via the non-IP-multicast-capable WAN using a second unicast connection, so as to forward the multicast data between the first and the third distributed convergence nodes over the non-IP-multicast-capable WAN using the first and the second unicast connections, the routing distributed convergence node in the second LAN configured to forward multicast data from each distributed convergence node of a plurality of LANs including the first and the third LANs to each other distributed convergence node of the plurality of LANs using unicast connections through the non-IP-multicast-capable WAN.

21. The apparatus of claim 20 wherein the routing distributed convergence node module is embodied in instructions executable by the processor processor and stored in at least one non-transistory processor-readable medium.

22. The apparatus of claim 20 wherein the routing distributed convergence node module is adapted to perform a session setup stage between the first distributed convergence node and the routing distributed convergence node, perform a registration stage between the first distributed convergence node and the routing distributed convergence node, conduct a data streaming stage between the first distributed convergence node and the third distributed convergence node, perform an unregistration stage between the first distributed convergence node and the routing distributed convergence node, and perform a session teardown stage between the first distributed convergence node and the routing distributed convergence node.

23. The apparatus of claim 20 wherein communicating traffic between the first and the third LAN distributed convergence nodes via the routing distributed convergence node includes communicating traffic via non-user network infrastructure devices in the form of at least one of a router or a server, in addition to the elected networked client devices.