QoS Based Adaptive Admission Controller for Next Generation Wireless Networks

Abstract

In 4G networks admission control will need to deal with many heterogeneous networks and admit new sessions to a network that is most appropriate to supply the requested QoS. In order to avoid the degradation of the QoS of low priority sessions, in this paper we propose a QoS Based Adaptive Admission Controller (QAAC). The service request is classified into two types new or handoff and the traffic is classified as real-time and non real-time. Then depending on the traffic class and type of service, the request is finally classified into four categories and priorities are assigned for each category. The admission control algorithm manages the various service requests in their queues and adaptively schedules them as per their assigned priorities. The basic concept of the algorithm is to simultaneously provide transmission priority and space priority for the data flows of the same end-user. The algorithm tries to minimize the number of the sessions that are blocked due to insufficient resources in the target network. By simulation results, we show that our proposed technique yields better throughput with reduced delay.