Decoupled cascaded mixers architechture and related methods

• US 8,937,889 B2
• Filed: 03/29/2012
• Issued: 01/20/2015
• Est. Priority Date: 12/22/2009
• Status: Active Grant

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola Solutions, Inc.
• Inventors: Koren, Eitan, Rahamim, Yosi, Shperling, Itzhak, Tooba, Abraham, Yalon, Nira
• Primary Examiner(s): ABELSON, RONALD B
• Application Number:
  US13/434,721
• Publication Number:
  US 20120188914A1
• Time in Patent Office: 1,027 Days
• Field of Search: 370260-263
• US Class Current: 370/261
• CPC Class Codes: H04L 12/1827 Network arrangements for conference optimisation or adaptation
• CPC Class Codes: H04L 12/185 with management of multicast group membership

Abstract

Methods for inter-mixer communication enable a “self-formed” cascaded mixer node tree topology. One method enables inter-mixer node signaling and includes first selecting a plurality of media flow payloads at a first cascaded mixer node. A set of conference payloads are generated and each include the media flow payloads from the plurality of media flow payloads that are part of the same conference call, an identifier for the conference call, and a node identifier for each media flow in the conference call. For each media flow in the conference call, each conference payload further identifies whether the first cascaded mixer node is a root node or a leaf node. The set of conference payloads are bundled into a single packet and sent to a second cascaded mixer node. Another method enables the “self-forming” of the mixer node tree topology. Yet another method enables active talker identification within the “self-formed” tree topology.

Claims

1. A method for inter-node signaling in a conferencing network, the method comprising:

at a first cascaded mixer node;

selecting a plurality of media flow payloads;

generating a set of bundled conference payloads associated with a plurality of conference calls, wherein each bundled conference payload includes media flow payloads from the plurality of media flow payloads that are part of the same conference call of the plurality of conference calls, an identifier for the conference call, and a node identifier for each media flow payload in the conference call, and wherein each bundled conference payload further identifies for each media flow payload in the conference call whether the first cascaded mixer node is a root node or a leaf node;

bundling the set of bundled conference payloads into a payload of a single packet; and

sending the single packet to a second cascaded mixer node.

2. The method of claim 1, wherein the single packet is a single Internet Protocol packet.

3. The method of claim 1, wherein the single packet further comprises a node load field that includes a measure of:

a number of conference participants connected to the first cascaded mixer node, a number of tree roots currently running on the first cascaded mixer node, and a number of leaves currently running on the first cascaded mixer node.

4. The method of claim 1, wherein at least one bundled conference payload comprises a single combined media flow payload that includes a summation of two or more different media flow payloads, wherein the node identifier for the different media flow payloads is a single node identifier.

5. The method of claim 1, wherein at least one bundled conference payload comprises two or more different individual media flow payloads, wherein each of the individual media flow payloads is associated with a participant identifier that identifies a conference participant that sent the media flow payload, and wherein the node identifier for each individual media flow payload identifies a cascaded mixer node to which the conference participant is connected.

6. The method of claim 1, wherein the first cascaded mixer node comprises a cascaded mixers framer, and wherein the set of bundled conference payloads are bundled into a payload of a single packet by the cascaded mixers framer.

12. The method of claim 1, wherein the single packet comprises a header attached to the set of bundled conference payloads and wherein each bundled conference payload of the set of bundled conference payloads includes, in association with each individual media flow payload that is part of the bundled conference payload, a participant identifier that identifies a conference participant that sent the individual media flow payload.

7. A mixer node capable of inter-node signaling in a conferencing network, the mixer node comprising:

a node controller that is configured to select a plurality of media flow payloads, generate a set of bundled conference payloads associated with a plurality of conference calls, wherein each bundled conference payload includes media flow payloads from the plurality of media flow payloads that are part of the same conference call of the plurality of conference calls, an identifier for the conference call, and a node identifier for each media flow payload in the conference call, and wherein each bundled conference payload further identifies for each media flow payload in the conference call whether the mixer node is a root node or a leaf node; and

a mixer node framer that is configured to bundle the set of bundled conference payloads into a payload of a single packet and send the single packet to another mixer node.

8. The mixer node of claim 7, wherein the single packet is a single Internet Protocol packet.

9. The mixer node of claim 7, wherein the single packet further comprises a node load field that includes a measure of:

a number of conference participants connected to the first cascaded mixer node, a number of tree roots currently running on the first cascaded mixer node, and a number of leaves currently running on the first cascaded mixer node.

10. The mixer node of claim 7, wherein at least one bundled conference payload comprises a single combined media flow payload that includes a summation of two or more different media flow payloads, wherein the node identifier for the different media flow payloads is a single node identifier.

11. The mixer node of claim 7, wherein at least one bundled conference payload comprises two or more different individual media flow payloads, wherein each of the individual media flow payloads is associated with a participant identifier that identifies a conference participant that sent the media flow payload, and wherein the node identifier for each individual media flow payload identifies a cascaded mixer node to which the conference participant is connected.

13. The mixer node of claim 7, wherein the single packet comprises a header attached to the set of bundled conference payloads and wherein the node controller is configured to include, in each bundled conference payload of the set of bundled conference payloads and in association with each individual media flow payload that is part of the bundled conference payload, a participant identifier that identifies a conference participant that sent the individual media flow payload.