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

• US 8,537,695 B2
• Filed: 05/31/2007
• Issued: 09/17/2013
• 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: Wiley, William L., Bugenhagen, Michael K., Morrill, Robert J.
• Primary Examiner(s): Nawaz, Asad
• Assistant Examiner(s): Mullen, Justin N
• Application Number:
  US11/809,391
• Publication Number:
  US 20080049927A1
• Time in Patent Office: 2,301 Days
• Field of Search: None
• US Class Current: 370/252
• 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, at a call control manager located on the packet network, a call request via an originating trunk on a packet network from an originating call device of a calling determining, by the call control manager, a transmission path from the originating trunk to a terminating segment of a terminating call device;

determining status of the originating trunk, wherein determining status of the originating trunk includes determining a worst operational performance of status parameters used for determining status;

determining status of the terminating segment;

responsive to a determination that 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;

responsive to a determination that 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;

responsive to a determination that the originating trunk and terminating segment can operate at a second, lower data rate, establishing the call over the transmission path between the originating call device and terminating call device at the second, lower data rate, wherein establishing the call over the transmission path between the originating call device and terminating call device at the second, lower data rate comprises;

sending, by the call control manager, an invite with the second, lower data rate to the terminating segment;

receiving, at the call control manager, a positive response message from the terminating segment in response to the invite containing the second, lower data rate; and

sending, by the call control manager, an information message to the originating trunk that includes the second, lower data rate;

responsive to a determination that the originating trunk and terminating segment cannot operate at a second, lower data rate, sending a call reject message to the originating line, automatically continue to regularly attempt to set-up the call;

responsive to a determination that the call request is able to be established, notifying the calling party that the call can now be set-up; and

rejecting the call request if status of either the originating trunk or terminating segment is within a third range, and sending a reject message to the originating call device.

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 and terminating segment includes accessing a table including status information of the originating trunk and terminating segment.

6. The method according to claim 1, wherein determining the status of the terminating segment is performed in response to a determination that the status of the originating trunk is normal.

7. 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.

8. 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.

9. 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, 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;

determine status of the terminating segment;

responsive to a determination that 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;

responsive to a determination that 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;

responsive to a determination that the originating trunk and terminating segment can operate at a second, lower data rate, establish the call over the transmission path between the originating call device and terminating call device at the second, lower data rate, wherein establishing the call over the transmission path between the originating call device and terminating call device at the second, lower data rate comprises;

send an invite with the second, lower data rate to the terminating segment;

receive a positive response message from the terminating segment in response to the invite containing the second, lower data rate; and

send an information message to the originating trunk that includes the second, lower data rate;

responsive to a determination that the originating trunk and terminating segment cannot operate at a second, lower data rate, send a call reject message to the originating line and automatically continue to attempt to set-up the call;

responsive to a determination that the call request is able to be established, notify the calling party that the call can now be set-up; and

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.

10. The system according to claim 9, 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.

11. The system according to claim 9, 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.

12. The system according to claim 10, 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.

13. The system according to claim 9, 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.

14. The system according to claim 13, wherein said processing unit, in accessing the table, is further configured to access a centralized table on the packet network.

15. The system according to claim 9, 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.

16. The system according to claim 9, 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.