Method for automatic and seamless call transfers between a licensed wireless system and an unlicensed wireless system

• US 20030176186A1
• Filed: 04/02/2002
• Published: 09/18/2003
• Est. Priority Date: 02/26/2001
• Status: Active Grant

• Current Assignee: Ribbon Communications Operating Company, Inc. (Ribbon Communications, Inc.)
• Original Assignee: Kineto Wireless Incorporated (Ribbon Communications, Inc.)
• Inventors: Mohammed, Jahangir
• Granted Patent: US 7,890,099 B2
• Time in Patent Office: Days
• US Class Current: 455/432.1
• CPC Class Codes: H04L 63/083 using passwords cryptographic mechanisms or cryptographic arrangements for entity authentication using a predetermined code H04L9/3226
• CPC Class Codes: H04L 63/0869 for achieving mutual authentication cryptographic mechanisms or cryptographic arrangements for mutual authentication H04L9/3273
• CPC Class Codes: H04M 3/42246 where the subscriber uses a multi-mode terminal which moves and accesses different networks with at least one network having a wireline access including cordless PBX
• CPC Class Codes: H04W 12/06 Authentication
• CPC Class Codes: H04W 12/08 Access security
• CPC Class Codes: H04W 12/35 Protecting application or service provisioning, e.g. securing SIM application provisioning
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 16/16 for PBS [Private Base Station] arrangements
• CPC Class Codes: H04W 36/0066 of control information between different types of networks in order to establish a new radio link in the target network
• CPC Class Codes: H04W 36/1446 wherein at least one of the networks is unlicensed
• CPC Class Codes: H04W 36/18 for allowing seamless reselection, e.g. soft reselection
• CPC Class Codes: H04W 4/16 Communication-related supplementary services, e.g. call-transfer or call-hold
• CPC Class Codes: H04W 74/00 Wireless channel access
• CPC Class Codes: H04W 8/12 between location registers or mobility servers

Abstract

A method of integrating a licensed wireless system and an unlicensed wireless system includes establishing a communication session through a landline. The communication session is linked to a subscriber device through an unlicensed wireless system servicing an unlicensed wireless system service area. An indication is received that the subscriber device is moving from the unlicensed wireless system service area into a licensed wireless system service area. Without disrupting the communication session, the communication session is automatically transitioned from the unlicensed wireless system to a licensed wireless system servicing the licensed wireless system service area. Similarly, a call initiated on the licensed wireless system is automatically transitioned to the unlicensed wireless system when the subscriber device enters the unlicensed wireless system service area.

Claims

1. A method of integrating a licensed wireless system and an unlicensed wireless system, comprising:

establishing a communication session through a landline;

linking said communication session to a subscriber device through an unlicensed wireless system servicing an unlicensed wireless system service area;

receiving an indication that said subscriber device is moving from said unlicensed wireless system service area into a licensed wireless system service area; and

without disrupting said communication session, automatically transitioning said communication session from said unlicensed wireless system to a licensed wireless system servicing said licensed wireless system service area.