Method and apparatus for establishing a group call session in a communication system

• US 6,456,855 B1
• Filed: 08/29/2000
• Issued: 09/24/2002
• Est. Priority Date: 08/29/2000
• Status: Expired due to Term

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Blanchard, Scott David, Heuvel, Dean Paul Vanden, Ganucheau, Charles Joseph Jr., Stosz, Jonathan David, Hayden, Rhett Garrett
• Primary Examiner(s): Chin, Vivian
• Assistant Examiner(s): Lee, John J
• Application Number:
  US09/650,386
• Time in Patent Office: 756 Days
• Field of Search: 455/12.1, 455/427, 455/430, 455/428, 455/13.1, 455/415, 455/414, 455/416, 455/429, 455/418, 455/518, 455/519, 370/261, 370/468, 370/522, 370/441, 370/331
• US Class Current: 455/518
• CPC Class Codes: H04B 7/18567 Arrangements for providing additional services to the basic mobile satellite telephony service
• 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 47/15 in relation to multipoint traffic arrangements for broadcast or multicast in data networks H04L12/18
• CPC Class Codes: H04L 47/70 Admission control; Resource allocation
• CPC Class Codes: H04L 47/806 Broadcast or multicast traffic
• CPC Class Codes: H04L 47/824 Applicable to portable or mobile terminals
• CPC Class Codes: H04L 47/828 Allocation of resources per group of connections, e.g. per group of users
• CPC Class Codes: H04W 76/45 for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]
• CPC Class Codes: H04W 84/06 Airborne or Satellite Networks space-based or airborne stations H04B7/185

Abstract

A communication system (10) includes a group call controller (GCC) (26) for use in establishing, maintaining, and controlling the provision of group call services within the communication system (10). To initiate a group call session for a particular subscriber group, a group call request is delivered to the GCC (26) that identifies the desired group. Upon receipt of the request, the GCC (26) coordinates the delivery of group call notification to the members of the identified group to notify the members of the initiation of the group call session and to identify to the members a physical communication channel (36) to be used by each member to participate in the group call. Upon receipt of the notification, the group members each tune to a corresponding physical communication channel (36) and are immediately made part of the group call. The group members are not required to make any transmissions on the physical channel (36) to participate in the group call.

Claims

1. A method for use in establishing a group call session in a communication system having a plurality of dynamic antenna beams with associated time varying channels providing communication services to a plurality of subscribers, said method comprising:

receiving a request to initiate a group call session for group members within a first group of subscribers;

determining dynamic antenna beams currently associated with group members in said first group of subscribers;

determining physical communication channel information for each of said dynamic antenna beams associated with said group members;

delivering said physical communication channel information to said plurality of subscribers via a signaling channel within the communication system; and

tuning to the physical communication channel by a first group member whereby the first group member immediately becomes part of the group call without being required to make any transmissions to participate in the call.

2. The method claimed in claim 1, wherein said step of determining physical communication channel information includes continuously updating said physical communication channel to be used by each of said plurality of subscribers.

3. The method claimed in claim 1, wherein said step of delivering physical communication channel information includes delivering information via a ring channel within the communication system.

4. The method claimed in claim 1, wherein said step of delivering physical communication channel information includes delivering information via a broadcast control channel within the communication system.

5. The method claimed in claim 1, wherein said delivering step comprises:

generating a ring message including a group identifier identifying said first group of subscribers and a physical channel identifier identifying a physical communication channel to be used by at least one group member; and

transmitting said ring message to said at least one group member via a ring channel.

6. The method claimed in claim 1, wherein said delivering step comprises:

generating a broadcast message including a group identifier identifying said first group of subscribers and a physical channel identifier identifying a physical communication channel to be used by at least one group member; and

transmitting said broadcast message to said at least one group member via a broadcast channel.

7. The method claimed in claim 6 further comprising the step of receiving said broadcast message by at least one of said plurality of subscribers.

8. The method claimed in claim 6, wherein said delivering step comprises:

generating a ring message including a group identifier identifying said first group of subscribers and a broadcast channel identifier identifying a broadcast channel to be used to transfer physical communication channel information to at least one group member;

transmitting said ring message to said at least one group member via a ring channel;

generating a broadcast message including said group identifier and a physical channel identifier identifying a physical communication channel to be used by said at least one group member; and

transmitting said broadcast message on said identified broadcast channel.

9. The method claimed in claim 1, wherein said communication system is a satellite communication system;

and

said step of determining physical communication channel information comprises;

identifying said plurality of dynamic antenna beams within said satellite communication system that currently include group members, each of said plurality of dynamic antenna beams including multiple physical communication channels; and

allocating at least one physical communication channel within each of said plurality of dynamic antenna beams for use by group members within each beam.

10. The method claimed in claim 1, wherein said request to initiate a group call session is received from one of said plurality of subscribers.

11. A satellite communication system comprising:

a plurality of space vehicles orbiting about a primary body and moving with respect to a surface of said primary body, each of the plurality of space vehicles containing a transceiver operable for communicating with another of the plurality of space vehicles; and

a group call controller (GCC) for managing group services within the satellite communication system, said GCC comprising;

an input for receiving a group call request requesting an initiation of a group call session for a predetermined subscriber group;

means for determining a space vehicle and associated satellite beam currently associated with a group member in said predetermined subscriber group;

means for determining a physical channel for each of said satellite beams associated with said predetermined subscriber group; and

means for transmitting a message to said first space vehicle to initiate delivery of group call notification from said first space vehicle to said at least one member of said predetermined subscriber group.

12. The satellite communication system claimed in claim 11, wherein said means for transmitting a message transmits said message via a signaling channel.

13. The satellite communication system claimed in claim 11, wherein said first space vehicle includes means for delivering said group call notification from said first space vehicle to said at least one member of said predetermined subscriber group via at least one signaling channel.

14. The satellite communication system claimed in claim 11, wherein said group call notification includes a group identifier identifying said predetermined subscriber group and a physical channel identifier identifying a physical channel to be used by said at least one member of said predetermined subscriber group to participate in said group call session.

15. The satellite communication system claimed in claim 11 wherein said space vehicle acts as nodes within a large communication network through which communication messages can be routed.

16. A satellite communication system, comprising:

a plurality of space vehicles orbiting about a primary body and moving with respect to a surface of said primary body, each of said space vehicles having a plurality of antenna beams for communicating with subscribers, each of said plurality of space vehicles having a transceiver operable for communicating with another of the said plurality of space vehicles;

a receiver for receiving a group call request requesting an initiation of a group call session for an identified subscriber group within the satellite communication system;

means for determining space vehicles and associated antenna beams currently associated with group member in said predetermined subscriber group;

means for acquiring physical channel information associated with said antenna beams that identifies a physical channel to be used by said at least one member of said identified subscriber group to participate in said group call session; and

means for notifying said at least one member of said identified subscriber group that a group call session has been initiated for said identified subscriber group, said means for notifying including means for delivering said physical channel information to said at least one member of said identified subscriber group.

17. The satellite communication system claimed in claim 16, wherein said means for notifying includes means for delivering at least one message from a space vehicle associated with said antenna beam to said at least one member of said identified subscriber group via at least one signaling channel.

18. The satellite communication system claimed in claim 17, wherein said at least one signaling channel includes at least one of the following:

a ring channel and a broadcast control channel.

19. The satellite communication system claimed in claim 16, wherein said means for notifying includes means for delivering a message to said at least one member of said identified subscriber group, said message including a group identifier identifying said subscriber group.