Method and system for monitoring and management of the performance of real-time networks
View Patent ↗Gateway routers for real-time networks have the ability to collect delay, loss, and jitter statistics on a per-connection basis. It is possible to use this information not only to monitor the quality of individual voice calls and other real-time connections, but also to evaluate the overall performance of the underlying network. This paper describes a method for monitoring and managing the performance of a real-time data network that supports voice, video and other real-time services. In the described embodiments, the RTCP mechanisms of RTP for sender and receiver reporting be used to relay performance information to one or more network monitoring sites for analysis and interpretation. In addition, gateway routers are organized and managed within a hierarchy that allows the monitoring function to localize it view of network conditions within the hierarchy; and the monitoring of network performance can occur on various time scales.
1. A network monitoring system for monitoring the packet delivery performance of a packet-based network, the network monitoring system comprising:
a first gateway device;
a second gateway device in communication with the first gateway device, wherein the first gateway device and the second gateway device communicate by transmitting a sequence of digital packets; and
a monitoring device associated with the first and second gateway devices,
wherein the second gateway device further comprises:
a control protocol process generating packet delivery performance statistics that are indicative of performance of packet delivery between the second gateway device and the first gateway device;
a network monitoring process for collecting the generated packet delivery performance statistics
a database for storing the collected packet delivery performance statistics, the database being organized according to gateway device pairs; and
a reporting process for sending the stored packet delivery performance statistics to the monitoring device.
2. The system of claim 1 wherein a view of network performance is measured by compiling packet performance statistics between the first and second gateway devices.
3. The system of claim 1 wherein the control protocol process generating packet delivery performance statistics utilizes RTCP.
4. The system of claim 1 wherein the sequence of digital packets includes real-time voice and audio information.
5. The system of claim 1 further comprising a plurality of gateways generating network performance data; wherein the gateways are organized according to a hierarchical network organization structure to facilitate the organization of network performance data.
6. The system of claim 5 wherein the network hierarchy comprises organizing individual gateway devices into groups for the purposes of collecting network packet delivery performance information according to the network hierarchy.
7. The system of claim 1 wherein the packet delivery performance statistics comprise jitter and packet loss statistics.
8. The system of claim 1 wherein the packet delivery performance statistics comprises round-trip delay statistics.
9. The system of claim 1 wherein the network monitoring system comprises alarm processing for detecting when packet delivery performance statistics exceed alarm thresholds.
10. The system of claim 1 wherein the network monitoring system comprises long term monitoring of packet delivery performance statistics.
11. A method for monitoring the performance of a network system comprising:
generating packet delivery statistics for packets from a first gateway device to a second gateway device;
compiling the generated packet delivery statistics at the second gateway device;
sending the compiled packet delivery statistics to a monitor device associated with the first and second gateway devices; and
monitoring the packet delivery statistics at the monitor device to determine the packet delivery performance between the first gateway device and the second gateway device.
12. The method of claim 11 wherein generating packet delivery statistics generating packet delivery statistics according to the RTCP protocol.
13. The method of claim 11 wherein compiling the generated packet delivery statistics comprises compiling the generated packet delivery statistics in a database, the database organizing the generated packet delivery performance according to pairs of gateways.
14. The method of claim 11 wherein monitoring the packet delivery statistics comprises monitoring the packet delivery statistics on various time scales.
15. The method of claim 14 wherein monitoring the packet delivery statistics on various time scales comprises monitoring the packet delivery statistics on a time scale appropriate to real-time monitoring of call sessions.
16. The method of claim 14 wherein monitoring the packet delivery statistics on various time scales comprises monitoring the packet delivery statistics on a time scale appropriate to near real-time monitoring to provide current network conditions.
17. The method of claim 14 wherein monitoring the packet delivery statistics on various time scales comprises monitoring the packet delivery statistics on a time scale appropriate to long-term trend analysis.