Join
today

Boliven PRO is more than just patent search

  • Build and save lists using the powerful Lists feature
  • Analyze and download your search results
  • Share patent search results with your clients

Patents »

US7804822: Method and apparatus for detecting subscriber service address change

Share

Filing Information

Inventor(s) Koan Seng Chong · Brian D. Freeman · Jay Gabin · Daryl Goins · Galia Merhav · Lina O'Connor · Chesla C. Wechsler ·
Assignee(s) AT&T Intellectual Property II, L.P. ·
Primary Examiner Gerald Gauthier ·
Application Number US11291023
Filing date 11/30/2005
Issue date 09/28/2010
Prior Publication Data
Predicted expiration date 06/10/2029
Patent term adjustment 1288
U.S. Classifications 370/356  · 713/1  · 709/224  · 370/352  ·
International Classifications H04L1266  ·
Kind CodeB2
Related U.S. Application DataThis application claims the benefit of U.S. Provisional Application No. 60/719,106 filed on Sep. 21, 2005, which is herein incorporated by reference.
The present invention relates generally to communication networks and, more particularly, to a method and apparatus for detecting subscriber service address change in communication networks, e.g., packet networks such as Voice over Internet Protocol (VoIP) networks.
13 Claims, 10 Drawings


Abstract

A method and apparatus for allowing VoIP service providers to detect service address changes of IP service subscribers are disclosed. Specifically, when a power cycle, e.g., powering off and on, of a particular VoIP endpoint device, such as a Terminal Adaptor (TA) or a soft phone client, is detected, a service provider may assume that the service address of the subscriber has changed. Therefore, appropriate actions can be taken by the service provider to obtain the latest service address from the subscriber to ensure accurate service address information is available, e.g., in support of an emergency call through the particular VoIP endpoint device.

Independent Claims | See all claims (13)

  1. 1. A method for detecting a service address change in a communication network, comprising: receiving a plurality of location management messages from an endpoint device in said communication network; detecting an occurrence of a power cycle or a reboot event based on said plurality of location management messages for said endpoint device, wherein said detecting comprises: recording a timestamp associated with each of said plurality of location management messages; and detecting said occurrence of said power cycle or said reboot event if a difference in time for successive location management messages is greater than a predefined threshold; and determining that a service address change is detected for said endpoint device based upon said occurrence of said power cycle or said reboot event being detected.
  2. 9. A computer-readable medium having stored thereon a plurality of instructions, the plurality of instructions including instructions which, when executed by a processor, cause the processor to perform steps of a method for detecting a service address change in a communication network, comprising: receiving a plurality of location management messages from an endpoint device in said communication network; detecting an occurrence of a power cycle or a reboot event based on said plurality of location management messages for said endpoint device, wherein said detecting comprises: recording a timestamp associated with each of said plurality of location management messages; and detecting said occurrence of said power cycle or said reboot event if a difference in time for successive location management messages is greater than a predefined threshold; and determining that a service address change is detected for said endpoint device based upon said occurrence of said power cycle or said reboot event being detected.
  3. 13. An apparatus for detecting a service address change in a communication network, comprising: means for receiving a plurality of location management messages from an endpoint device in said communication network; means for detecting an occurrence of a power cycle or a reboot event based on said plurality of location management messages for said endpoint device, wherein said detecting means comprises: means for recording a timestamp associated with each of said plurality of location management messages; and means for detecting said occurrence of said power cycle or said reboot event if a difference in time for successive location management messages is greater than a predefined threshold; and means for determining that a service address change is detected for said endpoint device based upon said occurrence of said power cycle or said reboot event being detected.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US6621820* Hewlett-Packard Development Company, L.P. Williams et al. Sep 2003
US6690659 Lucent Technologies Inc. Ahmed et al. Feb 2004
US6957276* Microsoft Corporation Bahl Oct 2005
US7024548* Cisco Technology, Inc. O'Toole, Jr. Apr 2006
US7082114* Nortel Networks Limited Engwer et al. Jul 2006
US7366894* Cisco Technology, Inc. Kalimuthu et al. Apr 2008
US7412521* Microsoft Corporation Olson et al. Aug 2008
US7516211* Cisco Technology, Inc. Gourlay et al. Apr 2009
US7532618* 3Com Corporation Saurabh et al. May 2009
US7580396* Intel Corporation Adrangi et al. Aug 2009
US20020152308* Feather et al. Oct 2002
US20030002637* Miyauchi et al. Jan 2003
US20030097587* Gulick May 2003
US20040181593* Navic Systems, Inc. Kanojia et al. Sep 2004
US20050148345* FUJITSU LIMITED Kawai et al. Jul 2005
US20080025327* KUMAR SURESH W Kumar Jan 2008
US20090037213* Eisen Feb 2009

Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
EP1337089Mitel Knowledge CorporationAug 2003
* cited by examiner

Other Publications

Partial EP Search Report for EP Application No. 06121073.8, Jun. 3, 2009, copy consists of 4 unnumbered pages.
Emmanuel Seurre, Patrick Savelli, Pierre-Jean Pietri, “GPRS for Mobile Internet”, 2003, Artech House, Norwood, MA, USA 58053, XP002528226, pp. 319-325.

Referenced By

The current document is not referenced by other documents.

Patent Family

The current document is not in a family.