Method and apparatus for merging call components during call reconstruction

• US 7,738,360 B2
• Filed: 10/29/2007
• Issued: 06/15/2010
• Est. Priority Date: 09/30/2004
• Status: Active Grant

• Current Assignee: Arlington Technologies, LLC (Dominion Harbor Enterprises, LLC)
• Original Assignee: Avaya Incorporated
• Inventors: Gillespie, Donald E., Velamala, Vivekananda, Marwah, Manish
• Primary Examiner(s): Sheikh; Ayaz R
• Assistant Examiner(s): Sloms; Nicholas
• Application Number:
  US11/927,164
• Publication Number:
  US 20080049770A1
• Time in Patent Office: 960 Days
• Field of Search: None
• US Class Current: 370/216
• CPC Class Codes: H04L 65/1043 Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
• CPC Class Codes: H04L 65/1083 In-session procedures
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 69/40 for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection management of faults, events, alarms or notifications in data switching networks H04L41/06

Abstract

The present invention is directed to a secondary communication server 216 for assuming control of a communication formerly controlled by a primary communication server 212 in the event of a failure, comprising:

(a) an input operable to (i) receive, from a first communication node 204a, first communication information, wherein the first communication information is associated with the communication and comprises a first node identifier 236a and/or a communication identifier 240a, the first node identifier 236a is associated with a second communication node 204b, the communication identifier is associated with the communication, and the second communication node 204b comprises second communication information associated with the communication and (ii) thereafter receive, from the second communication node 204b, the second communication information; and

(b) a reconstruction agent 228 operable to identify the second communication information based on the first node identifier 236a and/or communication identifier 240a.

Claims

1. A first media gateway, comprising:

a first communication information comprising;

a first node identifier identifying a second media gateway, the first and second media gateways handling a common communication, the common communication involving an inter gateway connection between the first and second media gateways, the common communication involving a primary communication server, and the first node identifier being further associated with the common communication;

a communication identifier identifying the first node identifier and the common communication, wherein the common communication is between a communication device in communication with the first media gateway and a second communication device in communication with the second media gateway;

connection state information;

termination property information;

wherein the first communication information is sent to a second communication server to reestablish the common communication with the second communication device if the second media gateway fails, wherein reestablishing the common communication further comprises;

retrieving the connection state and the termination property information;

constructing a temporary communication map;

saving termination property information with each termination in the map; and

a reconstruction agent populating the temporary communication map to reconstruct the records for the primary communication server.

2. The gateway of claim 1, wherein the first node identifier is at least one of an electronic address of the second gateway, an identifier of a data structure in the second gateway, and an identifier of at least one resource of the second gateway and wherein the data structure and at least one resource are associated with the common communication.

3. The gateway of claim 2, wherein the first node identifier comprises an resource identifier associated with a second ephemeral termination involved in the common communication and a context identifier associated with second context involved in the common communication and wherein the second ephemeral termination and second context are each stored in the second gateway.

4. The gateway of claim 3, wherein the first node identifier is saved by the first gateway as a property of a first context stored by the first gateway, the first and second context each being associated with the common communication.

5. The gateway of claim 1, wherein the first node identifier is transmitted to a backup server when the first media gateway determines that a primary server has failed.

6. The gateway of claim 5, wherein the second gateway is operable to transmit a node identifier associated with the first media gateway to the backup server after the first media gateway has transmitted the first node identifier.

7. The gateway of claim 1, further comprising a communication identifier that identifies a selected communication uniquely among a defined group of communications.

8. The gateway of claim 7, wherein the communication identifier comprises at least one of a session identifier, a session key, and a random variable generated to describe the common communication.

9. In a communication network including a first media gateway and second media gateway handling a common communication that involves an inter gateway connection between the first and second media gateways, wherein the common communication is controlled by a first communication server, a method, comprising:

the first media gateway maintaining first communication information, first communication information comprising;

a first node identifier identifying the second media gateway and the common communication, the common communication involving an inter gateway connection between the first and second media gateways;

a communication identifier identifying the first node identifier and the common communication, wherein the common communication is between a communication device in communication with the first media gateway and a second communication device in communication with the second media gateway;

the first media gateway determining that the first communication server is unable to continue controlling the common communication; and

the first media gateway transmitting the first communication information to a second communication server to reestablish the common communication between the first communication device and the second communication device, wherein reestablishing the common communication further comprises;

retrieving the connection state and the termination property information;

constructing a temporary communication map;

saving termination property information with each termination in the map; and

a reconstruction agent populating the temporary communication map to reconstruct the records for the first communication server.

10. The method of claim 9 ,wherein the second communication server is a backup server to the first communication server.

11. The method of claim 9, wherein the first media gateway determines that the first communication server is unable to continue controlling the common communication by detecting a failure in a signaling channel with the first server.

12. The method of claim 9, further comprising:

the second media gateway maintaining a second node identifier associated with the first media gateway and the common communication;

the second media gateway determining that the first communication server is unable to continue controlling the common communication; and

the second media gateway transmitting the second node identifier to the second communication server.

13. The method of claim 12, wherein the second media gateway transmits the second node identifier to the second communication server after the first media gateway transmits the first node identifier to the second communication server.

14. The method of claim 9, wherein the first node identifier is at least one of an electronic address of the second media gateway, an identifier of a data structure in the second media gateway, and an identifier of at least one resource of the second media gateway and wherein the data structure and at least one resource are associated with the common communication.

15. The method of claim 14, wherein the first node identifier comprises an resource identifier associated with a second ephemeral termination involved in the common communication and a context identifier associated with second context involved in the common communication and wherein the second ephemeral termination and second context are each stored in the second media gateway.

16. The method of claim 15, wherein the first node identifier is saved by the first media gateway as a property of a first context stored by the first media gateway, the first and second context each being associated with the common communication.

17. The method of claim 9, further comprising:

wherein the communication identifier that identifies a selected communication uniquely among a defined group of communications.

18. The method of claim 17, wherein the communication identifier is transmitted to the second communication server along with the first node identifier.

19. The method of claim 9, wherein the first media gateway and second media gateway each comprise a common communication identifier, and wherein the second media gateway maintains a second node identifier that is different from the first node identifier.

20. A computer readable medium comprising processor executable instructions operable to perform the steps of claim 9.