Multicast architecture for wireless mesh networks

• US 7,710,986 B2
• Filed: 01/05/2005
• Issued: 05/04/2010
• Est. Priority Date: 01/05/2005
• Status: Active Grant

• Current Assignee: Strong Force IoT Portfolio 2016, LLC (Strong Force Intellectual Capital, LLC)
• Original Assignee: MeshNetworks, Inc. (Motorola Solutions, Inc.)
• Inventors: Zheng, Heyun, Zeng, Surong
• Primary Examiner(s): Ngo, Ricky
• Assistant Examiner(s): KAO, WEI PO ERIC
• Application Number:
  US11/029,794
• Publication Number:
  US 20060146730A1
• Time in Patent Office: 1,945 Days
• Field of Search: 370/390, 370/432, 370/254, 370/255, 370/256, 370/401, 370/312, 370/328, 370/338, 370/352, 370/353, 370/354, 370/400, 370/408, 370/420
• US Class Current: 370/408
• CPC Class Codes: H04L 12/185 with management of multicast group membership
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• 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
• CPC Class Codes: H04L 45/16 Multipoint routing
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 4/08 User group management
• CPC Class Codes: H04W 40/02 Communication route or path selection, e.g. power-based or shortest path routing
• CPC Class Codes: H04W 60/00 Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration

Abstract

A multicast architecture and method of operation for multi-hop wireless mesh networks is provided. The multicast architecture is above the network infrastructure to identify a group of clients. These clients share the same application and communicate to each other by using a common multicast address.

Claims

1. A method for supporting multicast communication in a communication network, the method comprising:

forming a multicast group comprising a plurality of client devices, wherein the client devices comprise one or more mesh network devices operating in a wireless mesh network domain and one or more non-routable devices proxied by at least one mesh network device, arranged in a multi-hop multicast tree, and communicating using a wireless multicast routing protocol, wherein the wireless multicast group includes an internet access point (IAP);

communicating with the internet access point by at least one remotely located client device via one or more mesh network devices along the multi-hop multicast tree within the multicast group;

operating the internet access point as a multicast group forwarding node for the plurality of client devices of the multicast group;

running a group management protocol between the internet access point and an internet edge router to register the plurality of client devices of the multicast group with the internet edge router; and

running a wired multicast routing protocol to join the internet edge router to a global internet multicast group, thereby providing access to the global internet multicast group to the plurality of client devices of the multicast group.

2. The method of claim 1, further comprising:

notifying the internet access point of a multicast group address for the multicast group by one of the plurality of client devices; and

using the multicast group address in registering the multicast group with the internet edge router.

3. The method of claim 1, wherein the at least one remotely located client device comprises a non-routable device, and wherein at least one of the one or more mesh network devices comprise a routable device, the method further comprising:

running a network group management protocol between the non-routable device and the routable device.

4. The method of claim 3, further comprising:

registering a multicast group address for the non-routable device in the routable device.

5. The method of claim 3, wherein the routable device represents the non-routable device in order to allow the non-routable device to join the multicast group, the method further comprising:

registering the multicast group address for the non-routable device with the internet access point.

6. The method of claim 3, wherein the routable device forwards multicast traffic to and from the communication network for the non-routable device.

7. A communications network, comprising:

a plurality of client devices forming a multicast group, wherein the client devices comprise one or more mesh network devices operating in a wireless mesh network domain and one or more non-routable devices proxied by at least one mesh network device, wherein the client devices are arranged in a multi-hop multicast tree and communicate using a wireless multicast routing protocol, wherein the plurality of client devices includes;

at least one remotely located client device;

at least one internet access point, operating within the multicast group as a multicast group forwarding node for the plurality of client devices of the multicast group, wherein the at least one remotely located client device communicates with the internet access point via one or more mesh network devices along the multi-hop multicast tree within the multicast group; and

at least one internet edge router, wherein the internet access point runs a group management protocol with the internet edge router to register the plurality of client devices of the multicast group with the internet edge router, and wherein the internet edge router runs a wired multicast routing protocol to join the internet edge router to a global internet multicast group, thereby providing access to the global internet multicast group to the plurality of client devices of the multicast group.

8. The network of claim 7, wherein the at least one remotely located network device comprises a non-routable device, and wherein at least one of the one or more mesh network devices comprises a wireless routable device.

9. The network of claim 8, wherein a network group management protocol is run between the wireless routable device and the non-routable device.

10. The network of claim 9, wherein the non-routable device is a wired device.

11. The network of claim 9, wherein the non-routable device is a wireless device.

12. The network of claim 9, wherein a multicast group address for the non-routable device is registered in the wireless routable device.

13. The network of claim 9, wherein the wireless routable device represents the non-routable device in order to allow the non-routable device to join the multicast group, and further wherein the wireless routable device registers the multicast group address for the non-routable device with the internet access point.

14. The network of claim 9, wherein the wireless routable device forwards multicast traffic to and from the network for the non-routable device.

15. The network of claim 7, wherein at least one of the mesh network devices is a wireless routable access point.

16. The network of claim 7, wherein one of the plurality of mesh network devices notifies the internet access point of a multicast group address for the multicast group, and further wherein the internet access point uses the multicast group address in registering the multicast group with the internet edge router.