System and method for establishing a call being received by a trunk on a packet network

• US 20080049927A1
• Filed: 05/31/2007
• Published: 02/28/2008
• Est. Priority Date: 08/22/2006
• Status: Active Grant

• Current Assignee: CenturyLink Intellectual Property LLC (Lumen Technologies, Inc.)
• Original Assignee: CenturyLink Intellectual Property LLC (Lumen Technologies, Inc.)
• Inventors: Bugenhagen, Michael K., Morrill, Robert J., Wiley, William L.
• Granted Patent: US 8,537,695 B2
• Time in Patent Office: Days
• US Class Current: 379/230
• CPC Class Codes: H04L 47/2416 Real-time traffic
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04M 3/2227 Quality of service monitoring
• CPC Class Codes: H04M 7/0072 Speech codec negotiation H04L65/1069 takes precedence

Abstract

A method for establishing a call over a packet network may include receiving a call request via an originating trunk on a packet network from an originating call device. Status of an originating trunk and terminating segment may be determined. If the status of the originating trunk and terminating segment are within a first range, the call between the originating and terminating call device over the determined transmission path at a first data rate may be established. Otherwise, if the status of the originating trunk or terminating segment is within a second range, a determination as to whether the originating trunk and terminating segment can operate at a second, lower data rate may be made, and, if so, the call may be established over the transmission path between the originating call device and terminating call device at the second, lower data rate.

Claims

1. A method for establishing a call over a packet network said method comprising:

receiving a call request via an originating trunk on a packet network from an originating call device;

determining a transmission path from the originating trunk to a terminating segment of a terminating call device;

determining status of the originating trunk;

determining status of the terminating segment; and

if the status of the originating trunk and terminating segment are within a first range, establishing the call between the originating and terminating call device over the determined transmission path at a first data rate;

otherwise, if the status of the originating trunk or terminating segment is within a second range, determining whether the originating trunk and terminating segment can operate at a second, lower data rate, and, if so, establishing the call over the transmission path between the originating call device and terminating call device at the second, lower data rate.

2. The method according to claim 1, wherein establishing the call over the transmission path between the originating call device and terminating call device at the first data rate includes establishing the call via a CODEC at a first data rate.

3. The method according to claim 2, wherein establishing the call over the transmission path between the originating call device and terminating call device includes establishing the call via the CODEC at a second, lower data rate if the status of the originating trunk or terminating segment is within a second range.

4. The method according to claim 2, wherein establishing the call over the transmission path between the originating call device and terminating call device at the second data rate includes establishing the call via a second CODEC at a second, lower data rate.

5. The method according to claim 1, wherein determining status of the originating trunk includes determining a worst operational performance of status parameters used for determining status.

6. The method according to claim 1, wherein determining status of the originating trunk and terminating segment includes accessing a table including status information of the originating trunk and terminating segment.

7. The method according to claim 6, wherein accessing the table includes accessing a centralized table on the packet network.

8. The method according to claim 1, further comprising rejecting the call request if status of either the originating trunk or terminating segment is within a third range.

9. The method according to claim 1, wherein determining status of the originating trunk and terminating segment includes determining that the status of either is within the second range, the second range being indicative that the transmission path from the originating trunk to the terminating segment is operating in an impaired condition.

10. The method according to claim 1, further comprising computing status of the originating trunk and terminating segment based on network performance information of real-time content transmission via the originating trunk and terminating segment.

11. A system for establishing a call over a packet network said system comprising:

an input/output (I/O) unit configured to communicate over a network;

a storage unit configured to store network performance information associated with node segments on the packet network;

a processing unit in communication with said I/O unit and said storage unit and configured to;

receive a call request via an originating trunk on a packet network from an originating call device;

determine a transmission path from the originating trunk to a terminating segment of a terminating call device;

determine status of the originating trunk

determine status of the terminating segment; and

if the status of the originating trunk and terminating segment are within a first range, establish the call between the originating and terminating call device over the determined transmission path at a first data rate;

otherwise, if the status of the originating trunk or terminating segment is within a second range, determine whether the originating trunk and terminating segment can operate at a second, lower data rate, and, if so, establish the call over the transmission path between the originating call device and terminating call device at the second, lower data rate.

12. The system according to claim 11, wherein said processing unit, in establishing the call over the transmission path between the originating call device and terminating call device at the first data rate, is further configured to establish the call via a CODEC at the first data rate.

13. The system according to claim 12, wherein said processing unit, in establishing the call over the transmission path between the originating call device and terminating call device, is further configured to establish the call via the CODEC at a second, lower data rate if the status of the originating trunk or terminating segment is within the second range.

14. The system according to claim 12, wherein said processing unit, in establishing the call over the transmission path between the originating call device and terminating call device at the second data rate includes establishing the call via a second CODEC at a second, lower data rate.

15. The system according to claim 11, wherein said processing unit, in determining status of the originating trunk, is further configured to determine a worst operational performance of status parameters used for determining status.

16. The system according to claim 11, wherein said processing unit, in determining status of the originating trunk and terminating segment, is further configured to access a table including status information of the originating trunk and terminating segment.

17. The system according to claim 16, wherein said processing unit, in accessing the table, is further configured to access a centralized table on the packet network.

18. The system according to claim 11, wherein said processing unit is further configured to reject the call request if status of either the originating trunk or terminating segment is within a third range.

19. The system according to claim 11, wherein said processing unit, in determining status of the originating trunk and terminating segment, is further configured to determine that the status of either is within the second range, the second range being indicative that the transmission path from the originating trunk to the terminating segment is operating in an impaired condition.

20. The system according to claim 11, wherein said processing unit is further configured to compute status of the originating trunk and terminating segment based on network performance information of real-time content transmission via the originating trunk and terminating segment.