E911 implementation for IP phones

• US 20080013523A1
• Filed: 07/14/2006
• Published: 01/17/2008
• Est. Priority Date: 07/14/2006
• Status: Active Grant

• Current Assignee: Verizon Patent and Licensing Incorporated (Verizon Communications Inc.)
• Original Assignee: Verizon Patent and Licensing Incorporated (Verizon Communications Inc.)
• Inventors: Nambakkam, Sampath
• Granted Patent: US 9,014,197 B2
• Time in Patent Office: Days
• US Class Current: 370/352
• CPC Class Codes: H04L 65/1073 Registration or de-registration
• CPC Class Codes: H04M 2242/04 for emergency applications
• CPC Class Codes: H04M 2242/22 Automatic class or number identification arrangements
• CPC Class Codes: H04M 2242/30 Determination of the location of a subscriber
• CPC Class Codes: H04M 3/42042 Notifying the called party of information on the calling party details within substation equipment H04M1/57, signalling details H04Q3/72
• CPC Class Codes: H04M 7/0075 Details of addressing, directories or routing tables

Abstract

A system including an application server, the application server communicatively coupled to a service bureau configured to store location information, and communicatively coupled to a communication device over an Internet Protocol (IP) network, the communication device configured to transmit to the application server a call request message in order to establish a voice communication session, and to transmit voice information during the voice communication session; wherein the application server is configured to associate the communication device with a first telephone number and a second number, and the second number is associated with the stored location information.

Claims

1. A system comprising:

an application server, the application server communicatively coupled to a service bureau configured to store location information, and communicatively coupled to a communication device over an Internet Protocol (IP) network, the communication device configured to transmit to the application server a call request message in order to establish a voice communication session, and to transmit voice information during the voice communication session;

wherein the application server is configured to associate the communication device with a first telephone number and a second number, and the second number is associated with the stored location information.

2. The system of claim 1, wherein the application server is further configured to send a query to the service bureau in response to receiving the call request message, the query including the second number, and receive from the service bureau the stored location information in response to the query.

3. The system of claim 1 further comprising a gateway controller communicatively coupled to the application server and configured to receive routing information from the application server based on the stored location information.

4. The system of claim 3 further comprising a gateway communicatively coupled to the gateway controller and configured to receive query data from the gateway controller based on the routing information received at the gateway controller, receive the voice information from the communication device and convert the voice information from an IP format to a time-division multiplexed format.

5. The system of claim 4 further comprising a selective router communicatively coupled to the gateway and a Public Safety Answering Point (PSAP) and configured to route the voice information from the gateway to the PSAP.

6. The system of claim 5 further comprising an Automatic Location Information (ALI) database communicatively coupled to the service bureau and the PSAP and configured to provide ALI to the PSAP in response to a request from the PSAP.

7. The system of claim 1, wherein the communication device is a softphone.

8. The system of claim 1, wherein the second number is an emergency number which corresponds to outgoing emergency calls from the IP device so that emergency personnel can locate a user of the IP device using the stored location information.

9. A method comprising:

receiving a call request for a call from a communication device over an Internet Protocol (IP) network, wherein the communication device is associated with a first telephone number and a second number;

communicating information of the second number to a service bureau; and

receiving routing data from the service bureau, wherein the routing and query data corresponds to stored location information associated with the second number.

10. The method of claim 9 further comprising transmitting the routing data to a specific gateway controller and a specific gateway based on the routing data.

11. The method of claim 9 further comprising establishing a communication with the communication device prior to receiving an emergency call.

12. The method of claim 9, further comprising:

determining whether the call is a first type of outgoing call or a second type of outgoing call; and

selecting either the first telephone number or the second number based on the determination.

13. The method of claim 12, wherein the first type of outgoing call is associated with a determining the physical location of the communication device.

14. The method of claim 12, further comprising transmitting the call request, wherein the call request includes the second number when the call is determined to by the first type of call, and the call request includes the first telephone number when the call is determined to be the second type of outgoing call.

15. The method of claim 9, wherein the communication device is a softphone.

16. A computer-readable medium storing instruction executable by a processor, the instructions configured to perform the method of claim 9 when executed by the processor.

17. A method comprising:

receiving a call from an IP device, wherein the IP device is associated with a first telephone number and a second number;

determining whether the call is an emergency call; and

communicating either the first telephone number or the second telephone number based on the determination.

18. The method of claim 17 further comprising evaluating whether the call is from an IP phone or a softphone.

19. A method comprising:

receiving a primary telephone number and second number; and

associating a physical address with the second number.