System and method for notification of internet users about faults detected on an IP network

• US 7,463,652 B2
• Filed: 06/21/2003
• Issued: 12/09/2008
• Est. Priority Date: 06/21/2003
• Status: Active Grant

• Current Assignee: Avaya Incorporated
• Original Assignee: Avaya Incorporated
• Inventors: Krishnan, P., Li, Juan Jenny, Karol, Mark J.
• Primary Examiner(s): Chan; Wing F
• Assistant Examiner(s): Moore, Jr.; Michael J
• Application Number:
  US10/601,229
• Publication Number:
  US 20050002400A1
• Time in Patent Office: 1,998 Days
• Field of Search: None
• US Class Current: 370/476
• CPC Class Codes: H04L 41/06 Management of faults, events, alarms or notifications
• CPC Class Codes: H04L 41/147 for predicting network behaviour
• CPC Class Codes: H04L 41/5009 Determining service level performance parameters or violations of service level contracts, e.g. violations of agreed response time or mean time between failures [MTBF]
• CPC Class Codes: H04L 41/5087 wherein the managed service relates to voice services management of VoIP services H04M7/0081
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/65 Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
• CPC Class Codes: H04L 65/80 Responding to QoS
• 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 a system and method for rapid network failure detection, identification and notification to internet users. It is particular applicable to VoIP applications where such real-time problem identification is particular valuable. It reduces failure detection time by coordinating the sending frequency of RTP and RTCP packets. These incoming packets are monitored and the failure to receive a predetermined number in a specified time window indicates that a network problem has occurred. This problem is then promptly communicated to users of the system.

Claims

1. A method for detecting a potential problem in the transmission of a sequence of packets via an Internet Protocol (IP) network, said transmission occurring from a signal origin point to a signal destination point, said method comprising the steps of:

(a) examining an original packet sequence to be sent from said origin point, said original packet sequence comprising periods of silence between packets to be transmitted, to determine one or more extended silence periods wherein said extended silence period exceeds a predetermined time duration;

(b) introducing a keep-alive signal packet into each of said extended silence periods thereby converting said original packet sequence into a modified packet sequence;

(c) transmitting said modified packet sequence over the IP network; and

,

(d) detecting whenever at least one packet of said modified packet sequence has not been received at the signal destination point during a specified time interval,

wherein said original packet sequence comprises RTP packets and said keep-alive signal comprises RTCP packets.

2. The method of claim 1 wherein said keep-alive signal packet consists of a source description (SDES) RTCP packet with a source count (SC) of 0.

3. The method of claim 2 further comprising the step of notifying individual users at both the signal origin point and the signal destintation point of the potential problem with the IP network.

4. The method of claim 3 wherein said notification comprises the step of providing an estimated time to repair.

5. The method of claim 2 further comprising the step of notifying all individuals currently active on the IP network of the potential problem with the IP network.

6. The method of claim 2 further comprising the step of notifying all users on the IP network of the potential problem with the IP network.

7. The method of claim 1 wherein said IP network is administered by a network manager, and said method further comprises the step of notifying the network manager of the potential problem with the network.

8. The method of claim 7 wherein a plurality of transmissions of sequences of packets is sent via an identifiable routing path over the IP network, said routing path comprising multiple IP network components;

said method further comprising the step of;

(e) detecting a plurality of potential problems; and

,

(f) identifying a component common to said detected potential problems.

9. A method for detecting a potential problem in the transmission of a sequence of packets via an Internet Protocol (IP) network, said transmission occurring from a signal origin point to a signal destination point, said method comprising the steps of:

(g) introducing, at a fixed period, a keep-alive signal packet into an original packet sequence, thereby converting said original packet sequence into a modified packet sequence;

(h) transmitting said modified packet sequence over the IP network; and

,

(i) detecting whenever at least one packet of said modified packet sequence has not been received at the signal destination-point during a specified time interval,

wherein said keep-alive signal comprises RTCP packets.

10. A method for notifying users of an IP network of a problem in the transmission of a sequence of packets on said IP network, said transmission occurring from a signal origin point to a signal destination point, said method comprising the steps of:

introducing a keep-alive signal packet into silence periods of an original packet sequence, thereby converting said original packet sequence into a modified packet sequence, wherein said keep-alive signal packet consists of a source description (SDES) RTCP packet with a source count (SC) of 0;

transmitting said modified packet sequence over the IP network;

(j) detecting whenever at least one packet of said modified packet sequence has not been received at the signal destination point during a specified time interval; and

,

(k) notifying the users of said problem.

11. A system for detecting a potential problem in the transmission of a sequence of packets via an Internet Protocol (IP) network, said transmission occurring from a signal origin point to a signal destination point, said system comprising:

(I) means for examining an original packet sequence to be sent from said origin point, said original packet sequence comprising periods of silence between packets to be transmitted, to determine one or more extended silence periods wherein said extended silence period exceeds a predetermined time duration;

(m) means for introducing a keep-alive signal packet into each of said extended silence periods thereby converting said original packet sequence into a modified packet sequence;

(n) means for transmitting said modified packet sequence over the IP network; and

, (o) means for detecting whenever at least one packet of said modified packet sequence has not been received at the signal destination point during a specified time interval,

wherein said original packet sequence comprises RTP packets and said keep-alive signal comprises RTCP packets.

12. The system of claim 11 wherein said original packet sequence comprises VoIP data.

13. The system of claim 12 further comprising a means for notifying individual users at both the signal origin point and the signal destination point of the potential problem with the IP network.

14. The system of claim 13 wherein said means for notification comprises a means for providing an estimated time to repair.

15. The system of claim 12 further comprising a means for notifying all individuals currently active on the IP network of the potential problem with the IP network.

16. The system of claim 12 further comprising a means for notifying all users on the IP network of the potential problem with the IP network.

17. The system of claim 16 wherein said IP networks is administered by a network manager, and said system further comprises a means for notifying the network manager of the potential problem with the network.

18. The system of claim 17 wherein a plurality of transmissions of sequences of packets is sent via an identifiable routing path over the IP network, said routing path comprising multiple IP network components;

said system further comprising;

(p) means for detecting a plurality of potential problems; and

,

(q) means for identifying a component common to said detected potential problems.

19. A system for detecting a potential problem in the transmission of a sequence of packets via an Internet Protocol (IP) network, said transmission occurrinq from a signal origin point to a signal destination point, said system comprising:

(r) means for introducing, at a fixed period, a keep-alive signal packet into an original packet sequence, thereby converting said original packet sequence into a modified packet sequence;

(s) means for transmitting said modified packet sequence over the IP network; and

,

(t) means for detecting whenever at least one packet of said modified packet sequence has not been received at the signal destination point during a specified time interval,

wherein said keep-alive signal comprises RTCP packets.

20. A system for notifying users of an IP network of a problem in the transmission of a sequence of packets on said IP network, said transmission occurring from a signal origin point to a signal destination point, said system comprising:

means for introducing a keep-alive signal packet into silence periods of an original packet sequence, thereby converting said original packet sequence into a modified packet sequence, wherein said keep-alive signal packet consists of a source description (SDES) RTCP packet with a source count (SC) of 0;

means for transmitting said modified packet sequence over the IP network;

means for detecting whenever at least one packet of said sequence has not been received at the signal destination point during a specified time interval; and

,

means for notifying the users of said problem.