Multi-cell admission control for UMTS

Power-based multi-cell admission control is assessed as a solution to avoid unstable situations and to increase the system capacity in WCDMA networks, which are intended to provide high-speed data services. This paper proposes and analyses an uplink multi-cell admission control algorithm, which takes the interference level in the adjacent cells as well as in the serving one into account. Power increase estimation is crucial when performing power-based admission control tasks. With the aim of making the realisation of the multi-cell admission control algorithm possible, a method is derived to estimate the received power increase which a new mobile station generates in the adjacent base stations. Simulation results reveal that under non-homogeneous conditions the new algorithm provides a 34% capacity gain for a 5% of dropping connection probability.