About the problem of hot-spots under adaptive admission control in wireless multimedia networks

Adaptive admission control in cellular wireless networks reserves bandwidth for handoff calls which is proportional to the traffic intensity in the surrounding cells. This paper analyzes performance (QoS) of the adaptive admission algorithm in the presence of the nonuniform traffic conditions in the network. We analyze derivatives of cell capacity utilizations in hot-spot cell(s) and surrounding cells when hot-spot call arrival rate is growing and surrounding cells operate at the constant call arrival rate. We prove that they converge towards zero for high hot-spot call arrival rates. Therefore, there is no need to explicitly control QoS by the admission algorithm when new call arrival rates are changing in the network