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Effect of VBR traffic smoothing on broadband wireless Internet

In this work, we like to present the experience on design and implementation of traffic smoothing algorithm in our mobile streaming system for broadband wireless network. A number of smoothing algorithms have been proposed in various public forums and literatures(to be discussed in detail shortly). Each of these algorithms claims itself optimal in their own metrics, e.g. variance of rate changes, the number of rate changes, client buffer utilization, etc. The ultimate objective of smoothing is to provide better quality streaming service with minimum amount of resources by reducing the burstiness of the traffic. Packet loss and jitter is the two widely used metrics for QoS. The metrics mentioned above, e.g. client buffer utilization, the number of rate changes, variance of the transmission rate, do not have direct relationship with QoS, but are used since they are assumed to have direct impact on the packet loss and jitter behavior in some way. Indeed, none of these works address how their smoothing algorithms can improve the packet loss and jitter behavior in actual system. In this work, we like to present the result of study obtained from actual experiment. We instrument the effect of smoothing on packet loss behavior in mobile terminal on broadband wireless network under various different system settings. This activity requires comprehensive streaming system including streaming server, and streaming client.