Method and apparatus for routing a call to a dual mode wireless device

• US 8,599,873 B2
• Filed: 05/31/2012
• Issued: 12/03/2013
• Est. Priority Date: 05/17/2005
• Status: Expired due to Fees

• Current Assignee: AT&T Intellectual Property II LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property II LP (AT&T, Inc.)
• Inventors: Barzegar, Farhad, Gerszberg, Irwin
• Primary Examiner(s): Phung, Luat
• Application Number:
  US13/485,314
• Publication Number:
  US 20120236795A1
• Time in Patent Office: 551 Days
• Field of Search: 370/465, 370/331
• US Class Current: 370/465
• CPC Class Codes: H04W 36/14 Reselecting a network or an air interface
• CPC Class Codes: H04W 76/12 Setup of transport tunnels
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

Disclosed is a system and method for routing a call to a dual mode wireless device. In accordance with an embodiment of the invention, a network node receives a call. The network node determines that the call is associated with a dual mode wireless device. Once this determination is made, the network node then selects one of a plurality of networks (e.g., cellular network or packet-based network, such as a VoIP network) for use in connecting the call to the dual mode wireless device. The network node then routes the call to the dual mode wireless device via the selected network. During the call, the network node re-routes the call to another network if the network node determines that this other network is now better suited for the call.

Claims

1. A network node for routing a call to a dual mode wireless device, the network node comprising:

a processor; and

a memory to store computer program instructions, the computer program instructions when executed on the processor cause the processor to perform operations comprising;

receiving the call at the network node;

receiving dual mode wireless device status information periodically in response to polling the dual mode wireless device, the dual mode wireless device status information comprising a location of the dual mode wireless device, a strength of a signal received by the dual mode wireless device, and a cost associated with the call on each of a plurality of networks;

receiving network information for the plurality of networks, the network information comprising a capacity and a coverage of each of the plurality of networks;

designating a selected network for use in connecting the call to the dual mode wireless device by selecting one of the plurality of networks;

routing the call to the dual mode wireless device via the selected network; and

handing off the call to a non-selected network of the plurality of networks during the call based on the location of the dual mode wireless device, a coverage of the non-selected network, a data security preference for an encrypted network, and a cost analysis including a comparison of a cost associated with the call on the non-selected network relative to a cost associated with the call on the selected network.

2. The network node of claim 1 wherein the plurality of networks comprise one of a packet switched network and a circuit switched network.

3. The network node of claim 1 wherein the designating a selected network is based on the location of the dual mode wireless device and a coverage of the selected network.

4. The network node of claim 1 wherein the handing off the call to a non-selected network is further based on a capacity of the non-selected network.

5. A method for routing a call to a dual mode wireless device, the method comprising:

receiving the call at a network node;

receiving dual mode wireless device status information periodically in response to polling the dual mode wireless device, the dual mode wireless device status information comprising a location of the dual mode wireless device, a strength of a signal received by the dual mode wireless device, and a cost associated with the call on each of a plurality of networks;

receiving network information for the plurality of networks, the network information comprising a capacity and a coverage of each of the plurality of networks;

designating a selected network for use in connecting the call to the dual mode wireless device by selecting one of the plurality of networks;

routing the call to the dual mode wireless device via the selected network; and

handing off the call to a non-selected network of the plurality of networks during the call based on the location of the dual mode wireless device, a coverage of the non-selected network, a data security preference for an encrypted network, and a cost analysis including a comparison of a cost associated with the call on the non-selected network relative to a cost associated with the call on the selected network.

6. The method of claim 5 wherein the plurality of networks comprise one of a packet switched network and a circuit switched network.

7. The method of claim 5 wherein the designating a selected network is based on the location of the dual mode wireless device and a coverage of the selected network.

8. The method of claim 5 wherein the handing off the call to a non-selected network is further based on a capacity of the non-selected network.

9. A non-transitory computer readable medium storing computer program instructions for routing a call to a dual mode wireless device, which, when executed on a processor, cause the processor to perform operations comprising:

receiving the call at the network node;

receiving dual mode wireless device status information periodically in response to polling the dual mode wireless device, the dual mode wireless device status information comprising a location of the dual mode wireless device, a strength of a signal received by the dual mode wireless device, and a cost associated with the call on each of a plurality of networks;

receiving network information for the plurality of networks, the network information comprising a capacity and a coverage of each of the plurality of networks;

designating a selected network for use in connecting the call to the dual mode wireless device by selecting one of the plurality of networks;

routing the call to the dual mode wireless device via the selected network; and

handing off the call to a non-selected network during the call based on the location of the dual mode wireless device, a coverage of the non-selected network, a data security preference for an encrypted network, and a cost analysis including a comparison of a cost associated with the call on the non-selected network relative to a cost associated with the call on the selected network.

10. The computer readable medium of claim 9 wherein the plurality of networks comprise one of a packet switched network and a circuit switched network.

11. The computer readable medium of claim 9 wherein the designating a selected network is based on the location of the dual mode wireless device and a coverage of the selected network.

12. The computer readable medium of claim 9 wherein the handing off the call to a non-selected network is further based on a capacity of the non-selected network.