6,847,991 B1
6,876,646 B1 2002/0184376 A1 2006/0153064 A1*
METHODS, SYSTEMS, AND COMPUTER PROGRAM PRODUCTS FOR SESSION INITIATION PROTOCOL (SIP) FAST SWITCHOVER
Inventors: Richard A. Onorato, The Colony, TX (US); Phil Chiu, Plano, TX (US)
Assignee: Genband US LLC, Plano, TX (US)
Notice: Subject to any disclaimer, the term of this
patent is extended or adjusted under 35 U.S.C. 154(b) by 1427 days.
Prior Publication Data US 2007/0115806 A1 May 24, 2007
Int. Cl.
G06F 15/16 (2006.01)
U.S. Cl. ..................................................... .. 709/230 Field of Classification Search ................. .. 709/230 See application file for complete search history.
Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, or the Declaration for International Application No. PCT/US06/41073 (Jun. 1, 2007).
Roach, “Session Initiation Protocol (SIP)—Specific Event Notification,” Network Working Group, RFC 3265, pp. 1-34 (Jun. 2002). Rosenberg et al., “SIP: Session Initiation Protocol,” Network Working Group, RFC 3261 (Jun. 2002).
Chinese Official Action for Chinese Patent Application No. 200680051298.2 (Dec. 3, 2010).
Primary Examiner — Jeffrey Pwu
Assistant Examiner — Shripal Khajuria
(74) Attorney, Agent, or Firm — Jenkins, Wilson, Taylor & Hunt, P.A.
Disclosed are methods, systems, and computer program products for notifying a Session Initiation Protocol (SIP) entity of a fast switchover event. According to one method a first SIP entity having an active host and a standby host is provided. At the active host a SUBSCRIBE message is received from a second SIP entity for subscribing to a fast switchover notification service. The standby host is switched to an active mode. In response to switching the standby host to active mode, a NOTIFY message is sent to the second SIP entity for notifying the second SIP entity that the standby host is operating in active mode.
34 Claims, 6 Drawing Sheets
