An efficient approach to support QoS and bandwidth efficiency in high-speed mobile networks

A major concern about wireless QoS is call dropping rate. On the other hand, efficient use of the scarce wireless bandwidth has always been of top importance. In the literature, these two issues are addressed separately by reservation and dynamic channel allocation. In this paper, we intend to provide an efficient approach to address both issues. We first explore combining dynamic channel allocation with reservation. Two approaches, namely hard reservation and soft reservation, are pointed out and examined. Then we propose to use soft reservation and to adaptively adjust the number of reserved channels by means of monitored network parameters. Extensive simulations are provided to compare the performances of different approaches. The results show our proposed approach guarantees a low call dropping rate while providing efficient bandwidth usage.