Adaptive resource allocation mechanism during handoff for mobile Internet telephony

We present an overview of recent research efforts in developing adaptive delivery models for Internet multimedia applications, which dynamically adjust the transmission rate according to network conditions. The proposed mechanism utilizes service priority in multimedia applications. Simulation results show that the average rate of quality degradation increases as utilization increases. However, the degradation rate should be weighted against the increased handoff blocking probability, as priority is assigned to each channel within the permitted range that meets the traffic needs of each channel. The handoff dropping probability is reduced, in situations where resources were highly utilized, by the proposed mechanism.