Method for distributing media in an infrastructure based communication system

• US 8,194,629 B2
• Filed: 07/22/2008
• Issued: 06/05/2012
• Est. Priority Date: 07/22/2008
• Status: Active Grant

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola Solutions, Inc.
• Inventors: Agulnik, Anatoly, Tirpak, Thomas M., Xie, Hang
• Primary Examiner(s): Vu, Huy D
• Assistant Examiner(s): LINDENBAUM, ALAN LOUIS
• Application Number:
  US12/177,568
• Publication Number:
  US 20100020745A1
• Time in Patent Office: 1,414 Days
• Field of Search: 370/315, 370/328
• US Class Current: 370/338
• CPC Class Codes: H04L 12/1854 with non-centralised forwarding system, e.g. chaincast
• 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 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 65/4061 Push-to services, e.g. push-to-talk or push-to-video
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• 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 76/40 for selective distribution or broadcast
• CPC Class Codes: H04W 84/08 Trunked mobile radio systems
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user

Abstract

A wireless communication device acquires membership in a predefined group, joins an ad hoc network associated with the predefined group, and joins and participates in a first session established through an infrastructure device for distributing media to the predefined group. If the wireless communication device is a duplicator node for the ad hoc network, then it receives the media from the infrastructure device and distributes the media other nodes of the ad hoc network, otherwise it receives the media from the duplicator node. The infrastructure device identifies the duplicator node for each ad hoc network associated with the predefined group and each member of the predefined group that is not a node of any of the ad hoc networks and distributes the media only to these members of the predefined group.

Claims

1. A method for media distribution in an infrastructure-based communication system, the method comprising:

establishing, by a first infrastructure device, a session for a predefined group having as members a plurality of wireless communication devices where distribution of media within the predefined group is managed by the first infrastructure device, wherein the first predefined group has associated therewith at least one ad hoc network, with each ad hoc network being formed by and between a different subset of the members of the predefined group, with one wireless communication device of each subset being selected as a duplicator node for the corresponding ad hoc network;

identifying, by the first infrastructure device, the duplicator node for each ad hoc network and each member of the predefined group that is not a member of any of the ad hoc networks; and

distributing, by the first infrastructure device, media for the session to only the members of the predefined group that are not a node of any of the ad hoc networks and to the duplicator nodes for distributing to the remaining members of the predefined group that have joined the session wherein at least one of the members of the predefined group receives the media directly from one of the duplicator nodes via the first infrastructure device, wherein the one of the duplicator nodes receives the media directly from the first infrastructure device, and wherein the at least one of the members of the predefined group does not maintain an uplink channel with the first infrastructure device.

2. The method of claim 1 further comprising receiving, by the first infrastructure device, a notification of a change over time in at least one of:

the number of ad hoc networks;

nodes of one or more of the ad hoc networks;

or

the duplicator node for one or more of the ad hoc networks.

3. The method of claim 1 further comprising:

receiving, by the first infrastructure device, from a first member of the predefined group that was not a node of any of the at least one ad hoc networks, the identity of the duplicator node for one of the ad hoc networks; and

discontinuing, directly distributing the media from the first infrastructure device, to the first member.

4. The method of claim 1 further comprising:

receiving, by the first infrastructure device, an indication from a first member of the predefined group that the first member is no longer a node of the at least one ad hoc network; and

directly distributing the media from the first infrastructure device, to the first member.