Jitter Control in QoS Networks Yishay Mansour Dept. of Computer Science Tel-Aviv University and AT&T Research Labs Boaz Patt-Shamir Dept. of Electrical Engineering Tel-Aviv University and Northeastern University Hung, Kuo-EnNTHU/CS, Visual Communication Lab.

Outline Introduction Model Delay-jitter control –Off-line delay-jitter control –On-line delay-jitter control Distribute delay-jitter control

Introduction Delay-jitter –Bounds the maximum difference in the total delay of different packets.

Model Jitter-control algorithm Packet arrival sequencePacket release sequence Sequence of packet: 0, 1, 2…n : k Arrival time: a(k)

Model (cont’d)

Delay-jitter control Algorithm A: off-line delay-jitter control

Delay-jitter control(cont’d) Algorithm B: on-line delay-jitter control

Delay-jitter control(cont’d) X ave

Delay-jitter control(cont’d)

Proof

Delay-jitter control(cont’d) Proof

Distributed delay-jitter control Algorithm BD