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Active Jitter Control Stephen F. Bush General Electric Corporate R & D DARPA ITO F30602-98-C-0230 supported by the Air.

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Presentation on theme: "Active Jitter Control Stephen F. Bush General Electric Corporate R & D DARPA ITO F30602-98-C-0230 supported by the Air."— Presentation transcript:

1 Active Jitter Control Stephen F. Bush General Electric Corporate R & D DARPA ITO F C-0230 supported by the Air Force Research Laboratory/IF

2 DataHeader Traditional Packet Network HeaderCodeData Active Network Network-Aware Devices Custom code injected by applications/devices makes network intelligent Reduces protocol deployment time from years to months Adaptive monitoring, and predictive control Active Networking

3 Active Network Devices NodeOS/EE Network executes data packets. Network becomes computationally active.

4 Impacts Secure Virtual Private Networks Custom services for wireless users Fusion of media inside network Active Network E-Commerce Active negotiation Dynamic Coalitions Asset Management Remote Upgrades Self-management Remote fault diagnosis and repair Innovative Security Models

5 Without Network Jitter Control receiving node packets destination BUFFER Packets bunch together and must be evened out at receiving node. For packets i and j: D(i,j) = (R j -S j ) - (R i - S i ) S R i: j:

6 With Active Jitter Control NODE Buffer destination Packets delay themselves within the network to reduce jitter.

7 Per Packet/Node Delay Delay history is maintained in smallstate to determine distribution. Packet delays itself to exactly Q d time units.

8 Per Packet Decisions n Packets know their content. n Packets know their network environment. n Packets make the optimal decision concerning how long to delay to minimize variance.

9 Finer Resolution In-Stream Control NODE Buffer destination Portions of image or other jitter sensitive data can receive different levels of jitter control within the same network stream.

10 Conclusion n Active networks allow generic packet level processing within the network. n Active networks can be used to benefit real-time applications.


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