Method and system for providing softswitch failure protection in a communication network

• US 20040114748A1
• Filed: 12/16/2002
• Published: 06/17/2004
• Est. Priority Date: 12/16/2002
• Status: Active Grant

• Current Assignee: WSOU Investments, LLC (WSOU Holdings, LLC)
• Original Assignee: Alcatel SA (Nokia Corporation)
• Inventors: Copley, Jeffrey D.
• Granted Patent: US 7,023,977 B2
• Time in Patent Office: Days
• US Class Current: 379/221.03
• CPC Class Codes: H04L 65/103 in the network
• CPC Class Codes: H04L 65/104 in the network
• CPC Class Codes: H04L 65/1043 Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/80 Responding to QoS

Abstract

A method for providing softswitch failure protection in a communication network is provided that includes assigning an alias point code to a first softswitch. The alias point code is also assigned to a second softswitch. A message is generated that comprises a destination point code that is operable to identify a destination for the message. The destination point code comprises the alias point code.

Claims

1. A method for providing softswitch failure protection in a communication network having a first softswitch and at least a second softswitch, the first and second softswitches selectably operable to perform control services at least at a selected part of the communication network, said method comprising:

assigning an alias point code to the first softswitch;

assigning the alias point code to the second softswitch; and

generating a message comprising a destination point code that identifies a destination for the message, the destination point code comprising the alias point code.

2. The method of claim 1, further comprising directing the message generated during said operation of generating to the first softswitch when the first softswitch is functioning and has control to perform the control services at the selected part of the communication network.

3. The method of claim 1, further comprising directing the message to the second softswitch when the first softswitch is malfunctioning and the second softswitch is functioning and has control to perform the control services at the selected part of the communication network.

4. The method of claim 1, wherein said operation of generating a message comprises generating a message at a network element.

5. The method of claim 4, wherein the message comprises a signaling system number 7 message.

6. A method for providing softswitch failure protection in a communication network having a first softswitch and a second softswitch, the first softswitch and the second softswitch selectably operable to provide control service at least at a selected portion of the communication network, said method comprising:

assigning a first alias point code to a first softswitch;

assigning the first alias point code to a second softswitch;

assigning a second alias point code to the first softswitch;

assigning the second alias point code to the second softswitch;

generating a first message at a first network element, the first message comprising a destination point code operable to identify a destination for the first message, the destination point code comprising the first alias point code.

7. The method of claim 6, further comprising directing the first message to the first softswitch when the first softswitch is functioning and has control to provide the control service at least at the selected part of the communication network.

8. The method of claim 6, further comprising directing the first message to the second softswitch when the first softswitch is malfunctioning and the second softswitch is functioning and has control to provide the control service at least at the selected part of the communication network.

9. The method of claim 6, further comprising generating a second message at a second network element, the second message comprising a destination point code operable to identify a destination for the second message, the destination point code comprising the second alias point code.

10. The method of claim 9, further comprising directing the second message to the second softswitch when the second softswitch is functioning and has control.

11. The method of claim 9, further comprising directing the second message to the first softswitch when the second softswitch is malfunctioning and the first softswitch is functioning and has control.

12. The method of claim 9, the first and second messages generated during said operations of generating the first and second messages, respectively, comprise signaling system number 7 messages.

13. A system for providing softswitch failure protection in a communication network, said system comprising:

a first network element operable to generate a first message comprising a destination point code that is operable to identify a destination for the first message, the destination point code comprising a first alias point code;

a plurality of signal transfer points coupled to the first network element,

a first softswitch coupled to the signal transfer points, the first softswitch operable to be identified by the first alias point code; and

a second softswitch coupled to the signal transfer points, the second softswitch operable to be identified by the first alias point code.

14. The system of claim 13, wherein the signal transfer points are operable to direct the first message to the first softswitch when the first softswitch is functioning and has control.

15. The system of claim 13, the signal transfer points operable to direct the first message to the second softswitch when the first softswitch is malfunctioning and the second softswitch is functioning and has control.

16. The system of claim 13, further comprising:

a second network element coupled to the signal transfer points, the second media gateway controller operable to generate a second message comprising a destination point code that is operable to identify a destination for the second message, the destination point code comprising a second alias point code;

the first softswitch further operable to be identified by the second alias point code; and

the second softswitch further operable to be identified by the second alias point code.

17. The system of claim 16, the signal transfer points operable to direct the second message to the second softswitch when the second softswitch is functioning and has control.

18. The system of claim 16, the signal transfer points operable to direct the second message to the first softswitch when the second softswitch is malfunctioning and the first softswitch is functioning and has control.

19. A method for providing softswitch failure protection in a communication network, said method comprising:

sending a transfer allowed message comprising a first alias point code from a first softswitch to each of a plurality of adjacent signaling transfer points;

sending a transfer prohibited message comprising the first alias point code from a second softswitch to each of the adjacent signaling transfer points;

monitoring the first softswitch for failure, and if the first softswitch fails,

sending a transfer prohibited message comprising the first alias point code from the first softswitch to each of the adjacent signaling transfer points,

establishing control with the second softswitch, and

sending a transfer allowed message comprising the first alias point code from the second softswitch to each of the adjacent signaling transfer points.

20. The method of claim 19, further comprising:

sending a transfer allowed message comprising a second alias point code from the second softswitch to each of a plurality of adjacent signaling transfer points;

sending a transfer prohibited message comprising the second alias point code from the first softswitch to each of the adjacent signaling transfer points;

monitoring the second softswitch for failure; and

if the second softswitch fails,

sending a transfer prohibited message comprising the second alias point code from the second softswitch to each of the adjacent signaling transfer points,

establishing control with the first softswitch, and

sending a transfer allowed message comprising the second alias point code from the first softswitch to each of the adjacent signaling transfer points.