OPTIMIZING CALL SETUP LATENCY FOR GEOGRAPHICALLY DENSE GROUPS

• US 20080146207A1
• Filed: 12/13/2006
• Published: 06/19/2008
• Est. Priority Date: 12/13/2006
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Razdan, Ashu
• Granted Patent: US 8,068,823 B2
• Time in Patent Office: Days
• US Class Current: 455/416
• CPC Class Codes: H04M 2203/2044 Group features, e.g. closed user group
• CPC Class Codes: H04M 2242/30 Determination of the location of a subscriber
• CPC Class Codes: H04M 3/42 Systems providing special services or facilities to subscribers specially adapted for wireless communication networks H04W4/00
• CPC Class Codes: H04M 3/56 Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities video conference systems H04N7/15
• CPC Class Codes: H04W 4/08 User group management
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support
• CPC Class Codes: H04W 84/20 Master-slave selection or change arrangements

Abstract

A system and method for optimizing call setup latency for geographically dense groups including updating client location information using at least one application server while the client moves from one sector to another to provide a location update; identifying and updating parameters including location update information uniquely identifying a sector from which a client is receiving communication service; and determining at least one geographically dense call group; and choosing at least one designated responder to the at least call group. A client per cluster is selected as a designated responder for that cluster and when the server needs to set up a geographically dense group call, a random number is included corresponding to the designated responder for that group in a call setup message.

Claims

1. A method for optimizing call setup latency comprising:

updating client location information using at least one application server to provide a location update while at least one client moves from one sector to another;

identifying and updating parameters including location update information uniquely identifying a sector from which the at least one client is receiving communication service;

determining at least one geographically dense call group;

choosing at least one designated responder to respond to the at least one call group;

computing clusters of clients with related parameters; and

selecting at least one client per cluster as a designated responder for that cluster and when the server needs to set up a geographically dense group call, a random number is included corresponding to the designated responder for that group in a call setup message.

2. The method of claim 1 wherein the application server computes the logical OR of random numbers corresponding to the designated responders of a selected subset of a plurality of target clusters.

3. The method of claim 1 wherein a large cluster indicates that a large number of access terminals (AT) are members of a single geographically dense group residing in the same sector or collision domain.

4. The method of claim 1, wherein the client information comprises at least a System ID (SID) and a Network ID (NID).

5. The method of claim 1, wherein the client information comprises a communications network parameter.

6. The method of claim 1, wherein the client information comprises a carrier identifier.

7. The method of claim 1, wherein the client information comprises pilot signal related information.

8. The method of claim 1, wherein the client information comprises a pilot PN Offset.

9. The method of claim 1, wherein the server maintains state for a set of predefined groups that are likely to be geographically dense.

10. The method of claim 1, wherein the location update information includes a random number that the client generates as a signature and is used by the server in a call setup message after choosing at least one designated responder.

11. The method of claim 1, wherein the server maintains state for a set of predefined groups that are likely to be geographically dense.

12. A system for optimizing call setup latency comprising:

logic configured to update client location information using at least one application server to provide a location update while at least one client moves from one sector to another;

logic configured to identify and update parameters including location update information uniquely identifying a sector from which the at least one client is receiving communication service;

logic configured to determine at least one geographically dense call group;

logic configured to choose at least one designated responder to respond to the at least one call group;

logic configured to compute clusters of clients with related parameters; and

logic configured to select at least one client per cluster as a designated responder for that cluster and when the server needs to set up a geographically dense group call, a random number is included corresponding to the designated responder for that group in a call setup message.

13. The system of claim 12, comprising logic configured to compute the logical OR of random numbers corresponding to the designated responders of a selected subset of a plurality of largest clusters.

14. The system of claim 12, comprising logic configured to indicate that a large number of access terminals (AT) are members of a single geographically dense group residing in the same sector or collision domain.

15. The system of claim 12, comprising logic configured to maintain state for a set of predefined groups that are likely to be geographically dense.

16. A computer readable media embodying a method in a wireless communication system, the method comprising:

updating client location information using at least one application server to provide a location update while at least one client moves from one sector to another;

identifying and updating parameters including location update information uniquely identifying a sector from which the at least one client is receiving communication service;

determining at least one geographically dense call group;

choosing at least one designated responder to respond to the at least one call group;

computing clusters of clients with related parameters; and

selecting at least one client per cluster as a designated responder for that cluster and when the server needs to set up a geographically dense group call, a random number is included corresponding to the designated responder for that group in a call setup message.

17. The computer readable media of claim 16, further comprising computing the logical OR of random numbers corresponding to the designated responders of a selected subset of a plurality of largest clusters.

18. The computer readable media of claim 16, comprising logic configured to indicate that a large number of access terminals (AT) are members of a single geographically dense group residing in the same sector or collision domain.

19. The computer readable media of claim 18, wherein the server maintains state for a set of predefined groups that are likely to be geographically dense.