A novel approach of service management in wireless mobile networks

In wireless mobile environments, where resources are scarce, the basis for QoS provisioning is to control the admission of new and handoff subscriber services, to avoid future detriment perturbations of established connections. Most research efforts considered only the bandwidth of the wireless link to control the admission of new services. In addition, proposals for degrading and enhancing services only account for mobility. In this paper, we propose a novel approach for service admission and adaptation that considers, in addition to the station mobility, both bandwidth and error rate requirements as well as the possibility of multiple services per mobile station, while minimizing interference to neighbour cells as well as signalling overhead.When compared to other proposals in a simulated 3G cellular system, our admission control approach outperformed by 7% the equal priority and guard capacities schemes in terms of total number of accepted services in the cell, especially in high handoff and new call rates. Moreover, our adaptation scheme succeeded in improving the admission probability by a further 6% in indoor environments and 9% in outdoor environments.