An Admission Control Algorithm for WCDMA Considering Mobile Speed and Service Characteristics

Abstract

This paper deals with the problem of the downlink admission control for UTRA-FBD systems. In W-CDMA systems, elements such as traffic variability or user mobility cause that the resource requirements for each user in order to guarantee its QoS (quality of service) vary along time, making very difficult to estimate whether there will be or not available resources to satisfy the user demands. Admission control and other RRM (radio resource management) strategies play an important role in order to achieve an efficient use of the radio interface. In this context, information of certain user characteristics (such as user location or user mobility) would be prime important to obtain a more accurate estimation of the required resources for each user during its connection lifetime. This paper proposes an admission control algorithm which takes into account user mobility and service characteristics in order to obtain better decisions of admission or rejection of connection requests. The obtained results show the improvement of this new admission control proposal in heterogeneous scenarios when low-speed indoor users and medium/high-speed outdoor users have to coexist.