IP carrier peering

• US 10,356,248 B2
• Filed: 09/28/2018
• Issued: 07/16/2019
• Est. Priority Date: 06/30/2015
• Status: Active Grant

• Current Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Ku, Bernard S., Naidu, Lakshminarashimhan, Forsyth, James W.
• Primary Examiner(s): Abelson, Ronald B
• Application Number:
  US16/145,997
• Publication Number:
  US 20190037080A1
• Time in Patent Office: 291 Days
• CPC Class Codes: H04L 61/4511 using domain name system [DNS]
• CPC Class Codes: H04L 61/4557 Directories for hybrid networks, e.g. including telephone numbers
• CPC Class Codes: H04M 7/0075 Details of addressing, directories or routing tables

Abstract

Aspects of the subject disclosure may include, for example, a method and system to interconnect a first communications carrier to a second communications carrier by receiving a request to connect a communication from a first carrier to a second carrier; filtering the request to identify a specific name authority pointer (NPA-NXX) number from a plurality of specific name authority pointer (NPA-NXX) numbers; when the filter identifies the specific name authority pointer (NPA-NXX) number, modifying a private ENUM (tElephone NUmber Mapping) domain of the request to include an intercarrier ENUM apex based domain; retrieving a routing record using a domain name server (DNS) indicated by the intercarrier ENUM apex based domain; and routing the communication to the second carrier using the routing record. Other embodiments are disclosed.

Claims

1. A system to interconnect carrier communication systems, the system comprises:

a communication client, the communication client configured to;

receive a request, including an e.164 number, to connect an IP (Internet protocol) call from a first carrier to a second carrier;

filter the request to identify a specific name authority pointer (NPA-NXX) number;

when the filtering identifies the specific name authority pointer (NPA-NXX) number, modify a query to a private ENUM (tElephone NUmber Mapping) to include an intercarrier ENUM apex based domain;

forward the modified query to the second carrier to retrieve a routing record from the second carrier, wherein the forward the modified query includes an upchain to a tier 1 ENUM or tier 2 ENUM of the second carrier; and

route the IP call to the second carrier using the routing record.

2. The system of claim 1, wherein the filtering further identifies at least one additional specific name authority pointer (NPA-NXX) number.

3. The system of claim 2, wherein the specific name authority pointer (NPA-NXX) number is selected from a group of two or more specific name authority pointer (NPA-NXX) numbers representing two or more domains, respectively.

4. The system of claim 1, wherein the request includes IP services comprising any of:

VoLTE (voice over long term evolution), Video Calling, Capability Exchange or RCS (rich communication services) Messaging.

5. The system of claim 1, wherein the communication client includes an IMS (IP Multimedia Subsystem) infrastructure.

6. The system of claim 1 further comprising an BGCF (Breakout Gateway Control Function) to perform the modification of the query and forwarding of the modified query.

7. The system of claim 1 wherein the forward the modified query is performed by a DNS (Domain Name Server) forwarder.

8. The system of claim 1 further comprising an BGCF (Breakout Gateway Control Function) to perform the modification of the query and to perform as Transit Function (TF) forwarding of the modified query to a plurality of carriers until locating a carrier ENUM with the routing record.

9. The system of claim 1, wherein the intercarrier ENUM apex based domain includes one of:

a specific second carrier private ENUM domain or an intercarrier domain.

10. The system of claim 1, wherein the intercarrier ENUM apex based domain comprises e164enum.net.

11. A method to interconnect a first communications carrier to a second communications carrier, the method comprising:

receiving a request, including an e.164 number, to connect an IP (Internet protocol) call from a first carrier to a second carrier;

filtering the request to identify a specific name authority pointer (NPA-NXX) number;

when the filtering identifies the specific name authority pointer (NPA-NXX) number, modifying a query to a private ENUM (tElephone NUmber Mapping) to include an intercarrier ENUM apex based domain;

forwarding the modified query to the second carrier to retrieve a routing record from the second carrier, wherein the forwarding of the modified query includes an upchain to a tier 1 ENUM or tier 2 ENUM of the second carrier; and

routing the IP call to the second carrier using the routing record.

12. The method of claim 11, wherein the filtering further identifies at least one additional specific name authority pointer (NPA-NXX) number.

13. The method of claim 12, wherein the specific name authority pointer (NPA-NXX) number is selected from a group of two or more specific name authority pointer (NPA-NXX) numbers representing two or more domains, respectively.

14. The method of claim 11, wherein the request includes IP services comprising any of:

VoLTE (voice over long term evolution), Video Calling, Capability Exchange or RCS (rich communication services) Messaging.

15. The method of claim 11, wherein the intercarrier ENUM apex based domain comprises e164enum.net.

16. The method of claim 11, wherein the intercarrier ENUM apex based domain includes one of:

a specific second carrier private ENUM domain or an intercarrier domain.

17. A method to interconnect a first communications carrier to a second communications carrier, the method comprising:

receiving a request, including an e.164 number, to connect an IP (Internet protocol) call from a first carrier to a second carrier;

filtering the request to identify a specific name authority pointer (NPA-NXX) number from a plurality of specific name authority pointer (NPA-NXX) numbers;

when the filtering identifies the specific name authority pointer (NPA-NXX) number, modifying a query to a private ENUM (tElephone NUmber Mapping) to include an intercarrier ENUM apex based domain;

forwarding the modified query to the second carrier to retrieve a routing record from the second carrier, wherein the forwarding of the modified query includes an upchain to a tier 1 ENUM or tier 2 ENUM of the second carrier; and

routing the IP call to the second carrier using the routing record.

18. The method of claim 17, wherein the request includes IP services comprising any of:

VoLTE (voice over long term evolution), Video Calling, Capability Exchange or RCS (rich communication services) Messaging.

19. The method of claim 17, wherein the intercarrier ENUM apex based domain includes one of:

a specific second carrier private ENUM domain or an intercarrier domain.

20. The method of claim 17, wherein the intercarrier ENUM apex based domain comprises e164enum.net.