Seamless handoff across heterogeneous access networks using a handoff controller in a service control point

US8442005B2 · kind B2 · utility

Assignee

• TTI Inventions C LLC · US

Inventors

• Ashutosh Dutta · Bound Brook, US
• Subir Das · Kendall Park, US
• Donald Lukacs · Red Bank, US
• Tao Zhang · Beijing, CN
• David Shrader · Jacksonville, US
• Raquel Morera Sempere · Morristown, US
• Stephanie Demers · Westfield, US
• Bryan J. Lyles · Bedminster, US
• James Alfieri · Easton, US

Key dates

• Filing date: Dec 15, 2009
• Grant date: May 14, 2013
• Expiry date: Aug 5, 2031

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04W80/00
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

In a telecommunications network in which a mobile handset is capable of communicating in both an IP domain and a non-IP domain, the handoff of an existing communications session between the mobile handset and a fixed user is facilitated by a handoff controller implemented in a service control point. The handoff controller implements different handoff methods depending on the status of the fixed user and the transition of the mobile user. Additionally 802.21 Media Independent Handover Function in conjunction with SIP is used to facilitate handover between IP and Non-IP points in the system.