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

• US 8,223,794 B2
• Filed: 05/10/2010
• Issued: 07/17/2012
• 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:
  US12/776,832
• Publication Number:
  US 20100222052A1
• Time in Patent Office: 799 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 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 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 a packet switched network and a circuit switched network;

receiving network information for the packet switched network and the circuit switched network, the network information comprising a capacity and a coverage of the packet switched network and the circuit switched network in a particular area;

selecting one of the packet switched network and the circuit switched network for use in connecting the call to the dual mode wireless device, the selecting designating a selected network and a non-selected network;

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

handing-off the call to the dual mode wireless device via the non-selected network during the call, the handing-off based on;

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;

the location of the dual mode wireless device;

a data security preference;

a coverage of each of the packet switched network and the circuit switched network; and

a capacity of each of the packet switched network and the circuit switched network, the capacity based on information in a database and communication between the network node and the packet switched network and the circuit switched network.

2. The method of claim 1 wherein the handing-off further comprises selecting the non-selected network.

3. The method of claim 2 wherein the handing-off further comprises receiving one of device status information and network information for the non-selected network.

4. The method of claim 1 wherein the handing-off further comprises polling the dual mode wireless device for one of device status information and network information.

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

receive the call at the network node;

receive 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 a packet switched network and a circuit switched network;

receive network information for the packet switched network and the circuit switched network, the network information comprising a capacity and a coverage of the packet switched network and the circuit switched network in a particular area;

designate a selected network and a non-selected network by selecting one of the packet switched network and the circuit switched network for use in connecting the call to the dual mode wireless device;

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

determine whether to hand-off the call to the non-selected network during the call based on;

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;

the location of the dual mode wireless device;

a data security preference;

a coverage of each of the packet switched network and the circuit switched network; and

a capacity of each of the packet switched network and the circuit switched network, the capacity based on information in a database and communication between the network node and the packet switched network and the circuit switched network.

6. The method of claim 5 wherein the determination further comprises polling the dual mode wireless device.

7. The method of claim 5 wherein the determination further comprises handing-off the call to the non-selected network.

8. A network node for routing calls associated with a dual mode wireless device comprising:

means for receiving a call at a network node;

means for receiving 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 a packet switched network and a circuit switched network;

means for receiving network information for the packet switched network and the circuit switched network, the network information comprising a capacity and a coverage of the packet switched network and the circuit switched network in a particular area;

means for selecting one of the packet switched network and the circuit switched network for use by the dual mode wireless device, the selecting designating a selected network and a non-selected network;

means for routing the call to the dual mode wireless device over the selected network; and

means for determining at the network node whether to handoff the call from the selected network to the non-selected network during the call, the determining based on;

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;

the location of the dual mode wireless device;

a data security preference;

a coverage of each of the packet switched network and the circuit switched network; and

a capacity of each of a plurality of networks, the capacity based at lest on information in a database and communication between the network node and the packet switched network and the circuit switched network.