We address the problem of short term QoS, caused by unexpected nature of traffic and expectation of high utilization, by using measurement based adaptive bandwidth control. We develop a short term QoS guaranteed scheduler, called short term QoS Deficit Round Robin (SQ-DRR), which adapts the allocated bandwidth to guarantee delay constraints. The major appealing aspect of the scheduler is that it guarantees delay constraint for short term aggregate burst traffic violating pre-contracted descriptors at the same time without losing long term fairness. We then evaluate the scheduler performance with and without admission control scheme under non-stationary long-range dependence traffic. The simulation results indicate that the SQ-DRR performs well in single-hop and multi-hop network under dynamic burst traffic conditions.