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

• US 7,890,099 B2
• Filed: 04/02/2002
• Issued: 02/15/2011
• Est. Priority Date: 02/26/2001
• Status: Expired due to Fees

• Current Assignee: Ribbon Communications Operating Company, Inc. (Ribbon Communications, Inc.)
• Original Assignee: Kineto Wireless Incorporated (Ribbon Communications, Inc.)
• Inventors: Mohammed, Jahangir
• Primary Examiner(s): Eng; George
• Assistant Examiner(s): Iqbal; Khawar
• Application Number:
  US10/115,767
• Publication Number:
  US 20030176186A1
• Time in Patent Office: 3,241 Days
• Field of Search: 455/432.1, 455/435.2, 455/436, 455/426.1, 455/437, 455/439, 455/442, 455/41.2, 455/435.1, 455/448, 455/446
• 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 36/14 Reselecting a network or an air interface
• 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, said unlicensed wireless system comprising particular unlicensed wireless base station and an unlicensed wireless system server connected via Internet, the method comprising:

establishing a communication session with a subscriber device using the unlicensed wireless system servicing an unlicensed wireless system service area, wherein said subscriber device communicates wirelessly with said particular unlicensed wireless base station;

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

receiving at the unlicensed wireless system server a request to transition from the unlicensed wireless system to the licensed wireless system, said request going from the particular unlicensed wireless base station to the unlicensed wireless system server via the Internet, said request triggering a command from the licensed wireless system to transition from the unlicensed wireless system to the licensed wireless system, wherein the unlicensed wireless system server is communicatively coupled via the Internet to multiple unlicensed wireless base stations that serve multiple unlicensed wireless system service areas, in order to communicatively couple the licensed wireless system to the unlicensed wireless base stations, wherein the Internet is a worldwide network of networks;

initiating a transition from the unlicensed wireless system to the licensed wireless system; and

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

2. The method of claim 1 further comprising simultaneously maintaining connections with said unlicensed wireless system and said licensed wireless system prior to establishing a final connection with said licensed wireless system.

3. The method of claim 1, wherein said subscriber device is a wireless transceiver.

4. The method of claim 3, wherein said wireless transceiver is selected from the group consisting of a cellular telephone, a Personal Communication Services (PCS) telephone, a wireless data modem, a wireless enabled Personal Digital Assistant, and a wireless enabled computer.

5. A method of integrating a licensed wireless system and an unlicensed wireless system, said unlicensed wireless system comprising a particular unlicensed wireless base station and an unlicensed wireless system server connected via Internet, the method comprising:

establishing a communication session with a subscriber device using the licensed wireless system servicing a licensed wireless system service area;

receiving an indication that said subscriber device is moving from said licensed wireless system service area into an unlicensed wireless system service area serviced by the unlicensed wireless system;

receiving at the unlicensed wireless system server a request to transition from the licensed wireless system to the unlicensed wireless system, said request triggering a transition of said communication session to the unlicensed wireless system, wherein the unlicensed wireless system server is communicatively coupled via the Internet to multiple unlicensed wireless base stations that serve multiple unlicensed wireless system service areas, in order to communicatively couple the licensed wireless system to the unlicensed wireless base stations, wherein the Internet is a worldwide network of networks; and

without disrupting said communication session, automatically transitioning said communication session at said subscriber device from said licensed wireless system to said unlicensed wireless system.

6. The method of claim 5 further comprising simultaneously maintaining connections with said licensed wireless system and said unlicensed wireless system prior to establishing a final connection with said unlicensed wireless system.

7. The method of claim 6, wherein said simultaneously maintaining includes utilizing the unlicensed wireless base station to establish an unlicensed wireless system communication session to anchor the transition from said licensed system.

8. The method of claim 5, wherein said automatically transitioning includes utilizing the unlicensed wireless system server to emulate the operation of a licensed wireless system mobile switch center.

9. The method of claim 5, wherein said subscriber device is a wireless transceiver.

10. The method of claim 9, wherein said wireless transceiver is selected from the group consisting of a cellular telephone, a Personal Communication Services (PCS) telephone, a wireless data modem, a wireless enabled Personal Digital Assistant, and a wireless enabled computer.