Methods, systems and computer program products for selective network management in a network having multiple active routes to a common destination that are keyed by different combinations of parameters

• US 20080101248A1
• Filed: 11/29/2006
• Published: 05/01/2008
• Est. Priority Date: 10/31/2006
• Status: Abandoned Application

• Current Assignee: Tekelec
• Original Assignee: Tekelec
• Inventors: Marsico, Peter J., Palmer, Jonathan J., Hildebrand, John L., Khungar, Komal G.
• Application Number:
  US11/605,941
• Publication Number:
  US 20080101248A1
• Time in Patent Office: Days
• US Class Current: 370/248
• CPC Class Codes: H04L 41/0686 Additional information in the notification, e.g. enhancement of specific meta-data
• CPC Class Codes: H04L 43/0817 by checking functioning
• CPC Class Codes: H04L 45/02 Topology update or discovery
• CPC Class Codes: H04L 45/22 Alternate routing
• CPC Class Codes: H04L 45/28 using route fault recovery

Abstract

The subject matter described herein includes methods, systems, and computer program products for selective network management in a network having multiple active routes to a common destination that are keyed by different combinations of parameters. According to one aspect, the subject matter described herein includes a method for controlling distribution of network management messages concerning the status of a signaling link by provisioning a routing node with a primary route to a destination and at least one exception route to the destination wherein the primary route and the exception route are keyed by different combinations of signaling message parameters. The method includes receiving network management messages concerning the status of the destination on a linkset corresponding to the exception route, updating the status of the exception route in a route table maintained by the routing node, and suppressing the broadcasting of network management messages concerning the status of the destination to nodes adjacent to the routing node.

Claims

1. A method for controlling distribution of network management messages concerning the status of a destination when the destination is reachable via multiple routes keyed by different combinations of parameters, the method comprising:

(a) provisioning a routing node with a primary route to a destination and at least one exception route to the destination, wherein the primary route and the exception route are keyed by different combinations of signaling message parameters;

(b) detecting an event concerning the status of the destination on a linkset corresponding to the exception route;

(c) updating the status of the exception route in a route table maintained by the routing node; and

(d) suppressing broadcasting of network management messages concerning the status of the destination to nodes adjacent to the routing node.

2. The method of claim 1 wherein detecting an event concerning the status of the destination includes receiving a network management message concerning the status of the destination.

3. The method of claim 1 wherein detecting an event concerning the status of the destination includes detecting the failure of a linkset corresponding to an exception route.

4. The method of claim 2 wherein receiving a network management message concerning the status of a destination includes receiving one of a transfer prohibited (TFP) message, a transfer restricted (TFR) message, a transfer cluster prohibited (TCP) message, and a transfer cluster restricted (TCR) message.

5. The method of claim 1 wherein the routing node comprises a signal transfer point (STP).

6. The method of claim 1 comprising:

(a) receiving a signaling message;

(b) determining whether parameters in the signaling message match routing key parameters of the exception route;

(c) in response to determining that the parameters in the signaling message match the routing key parameters of the exception route, routing the message over the exception route; and

(d) in response to determining that the parameters in the signaling message do not match the routing key parameters of the exception route, routing the signaling message over the primary route.

7. A method for selectively informing a node of the status of an exception route used as an exclusive route by a node to a destination, the method comprising:

(a) maintaining a route table in a routing node, wherein the route table includes a primary route to a destination that functions as a fall-through route to the destination, a plurality of exception routes to the destination, wherein the exception routes are keyed by different combinations of parameters than the primary route, and wherein at least one of the exception routes comprises an exclusive route to the destination for an originating node;

(b) detecting, over a linkset corresponding to the exclusive route, a an event concerning the status of the destination;

(c) updating the status of the exclusive route based on the event; and

(d) sending a network management message indicating the status of the destination to the originator and suppressing the sending of the network management message to nodes that use the remaining exception routes and the primary route to the destination.

8. The method of claim 7 wherein detecting an event concerning the status of the destination includes receiving a network management message concerning the status of the destination.

9. The method of claim 7 wherein detecting an event concerning the status of the destination includes detecting the failure of the linkset corresponding to an exception route.

10. The method of claim 7 wherein the routing node comprises a signal transfer point (STP).

11. The method of claim 8 wherein receiving a network management message includes receiving one of a transfer restricted (TFR) message, a transfer prohibited (TFP) message, a transfer cluster restricted (TCR) message, and a transfer cluster prohibited (TCP) message.

12. The method of claim 7 comprising selectively testing the status of the exclusive route and informing the originator of the status.

13. The method of claim 12 wherein selectively testing the status of the exclusive route includes sending a route set test (RST) message over the linkset corresponding to the exclusive route.

14. A method for communicating exception route status among nodes that use a primary route and at least one exception route to a destination where the routes are keyed by different combinations of parameters, the method comprising:

(a) detecting an event concerning the status of an exception route to a destination in a node that maintains a primary route and at least one exception route to the destination, wherein the primary route and the exception route are keyed by different combinations of signaling message parameters;

(b) generating a network management message including at least one parameter that uniquely identifies the exception route that the event concerns; and

(c) communicating the network management message to at least one adjacent node.

15. The method of claim 14 comprising communicating a network handshake message to at least one adjacent node for determining whether the at least one adjacent node is capable of processing the network management message.

16. The method of claim 14 wherein generating the network management message includes identifying the exception route by a destination point code and at least one parameter in addition to the destination point code.

17. The method of claim 16 wherein the at least one additional parameter includes at least one of an originating point code, an originating linkset, a service indicator, and a circuit identifier code.

18. The method of claim 14 wherein the originating node selectively tests the exception route by sending a network management message that uniquely identifies the exception route to the destination.

19. The method of claim 18 wherein the network management message used to test the exception route identifies the exception route by a destination point code and at least one of an originating point code, an originating linkset, a service indicator, and a circuit identifier code.

20. A method for providing tiered quality of service for routing signaling messages and for providing network management to maintain the tiers, the method comprising:

(a) providing a first high speed route for a first customer with fall-through to a low speed route in response to unavailability of the high speed route;

(b) providing a low speed route for routing signaling message traffic of a second customer; and

(c) selectively performing network management for the high speed route and the low speed route.

21. The method of claim 20 wherein the high speed route comprises an SS7 over IP route and the low speed route comprises an SS7 over time division multiplexed (TDM) route.

22. The method of claim 20 wherein the high speed and low speed routes are keyed by different originating point code parameters.

23. The method of claim 20 wherein selectively performing network management includes, in response to failure of the high speed route, refraining from sending network management messages concerning the status of the high speed route, and in response to failure of the low speed route, sending a network management message exclusively to the second customer.

24. A signaling message routing node for controlling distribution of network management messages concerning the status of a status link, the node comprising:

(a) a route table embodied in a computer readable medium, the route table including a primary route to a destination and at least one exception route to the destination wherein the primary route and the exception route are keyed by different combinations of signaling message parameters; and

(b) a route manager for detecting an event concerning the status of the destination on a linkset corresponding to the exception route, for updating the status of the exception route in a route table maintained by the routing node, and for suppressing broadcasting of network management messages concerning the status of the destination to nodes adjacent to the routing node.

25. A signaling message routing node for controlling generation of a network management message to test the status of a route in a signaling message routing node that includes a plurality of routes that use the same linkset and that have different routing criteria, the signaling message routing node comprising:

(a) a route table embodied in a computer readable medium, the route table including a plurality of routes corresponding to the same linkset, wherein the plurality of routes are keyed by different combinations of signaling message parameters; and

(b) a route manager for detecting an event concerning the status of the destination on the linkset, for updating the status of the plurality of routes corresponding to the linkset based on the network management message, for invoking a single route set test procedure on behalf of the plurality of routes, and for updating status of each of the routes based on a result of the testing.

26. A signaling message routing node for controlling generation of a network management message to test the status of a route in a signaling message routing node that includes a plurality of routes that use the same linkset and that have different routing criteria, the signaling message routing node comprising:

(a) a route table embodied in a computer readable medium, the route table including a primary route to a destination that functions as a fall-through route to the destination and a plurality of exception routes with the destination, wherein the exception routes are keyed by different combinations of parameters than the primary route, and wherein at least one of the exception routes comprises an exclusive route to a destination for an originating node; and

(b) a route manager for detecting an event concerning the status of the exclusive route and updating the status of the exclusive route based on the network management message, for sending a network management message indicating the status of the exclusive route to the originator and suppressing sending of network management messages concerning the exclusive route to nodes that use the remaining exception routes and the primary route to the destination.

27. A signaling message routing node for communicating exception route status among nodes that use a primary route and at least one exception route to a destination where the routes are keyed by different cognations of parameters, the signaling message routing node comprising:

(a) a route table embodied in a computer readable medium, the route table including a primary route and at least one exception route to a destination, wherein the primary route and the exception route are keyed by different combinations of signaling message parameters; and

(b) a route manager for detecting an event that affects the status of an exception route to a destination and generating, based on a network management message, a network management message including a plurality of parameters that uniquely identify the affected exception route, and for communicating the network management status message to at least one adjacent node.

28. A signaling message routing node for providing tiered quality of service for routing signaling messages and for providing network management to maintain the tiers, the signaling message routing node comprising:

(a) a route table embodied in a computer readable medium, the route table including a first high speed route with fall-through to a low speed route; and

(b) a route manager for providing the high speed route for routing signaling message traffic of a first customer and, in response to unavailability of the high speed route, providing the low speed route for routing signaling message traffic of the first customer, for providing the low speed route for routing signaling message traffic of a second customer, and for selectively performing network management for the high speed route and the low speed route.

29. A computer program product comprising computer executable instructions embodied in a computer readable medium for performing steps comprising:

(a) provisioning a routing node with a primary route to a destination and at least one exception route to the destination wherein the primary route and the exception route are keyed by different combinations of signaling message parameters;

(b) detecting an event concerning the status of the destination on a linkset corresponding to the exception route;

(c) updating the status of the exception route in a route table maintained by the routing node; and

(d) suppressing broadcasting of network management messages concerning the status of the destination to nodes adjacent to the routing node.

30. A computer program product comprising computer executable instructions embodied in a computer readable medium for performing steps comprising:

(a) provisioning a routing node with a plurality of routes corresponding to the same linkset, wherein the plurality of routes are keyed by different combinations of signaling message parameters;

(b) detecting an event concerning the status of the destination on the linkset;

(c) updating the status of the plurality of routes corresponding to the linkset based on the network management message;

(d) invoking a single route set test procedure on behalf of the plurality of routes; and

(e) updating the status of each of the routes based on a result of the testing.

31. A computer program product comprising computer executable instructions embodied in a computer readable medium for performing steps comprising:

(a) maintaining a route table in a routing node, wherein, the route table includes a primary route to a destination that functions as a fall-through route to the destination, a plurality of exception routes with the destination, wherein the exception routes are keyed by different combinations of parameters than the primary route, and wherein at least one of the exception routes comprises an exclusive route to a destination for an originating node;

(b) detecting an event concerning the status of the exclusive route;

(c) updating the status of the exclusive route based on the network management message; and

(d) sending a network management message indicating the status of the exclusive route to the originator and suppressing sending of network management messages concerning the status of the exclusive route to nodes that use the remaining exception routes and the primary route to the destination.

32. A computer program product comprising computer executable instructions embodied in a computer readable medium for performing steps comprising:

(a) detecting an event that affects the status of an exception route to a destination in a node that maintains a primary route and at least one exception route to the destination, wherein the primary route and the exception route are keyed by different combinations of signaling message parameters;

(b) generating, based on a network management message, a network management message including a plurality of parameters that uniquely identify the affected exception route; and

(c) communicating the network management status message to at least one adjacent node.

33. A computer program product comprising computer executable instructions embodied in a computer readable medium for performing steps comprising:

(a) providing a first high speed route for a first customer with fall-through to a low speed route in response to unavailability of the high speed route;

(b) providing the low speed route for routing signaling message traffic of a second customer; and

(c) selectively performing network management for the high speed route and the low speed route.