A CLASS-BASED ADMISSION CONTROL ALGORITHM FOR SHARED WIRELESS CHANNELS SUPPORTING QOS SERVICES

摘要

Third Generation (3G) wireless networks all support a shared high-speed downlink channel for efficient transport of data. These channels use several common techniques (fast link rate adaptation, Hybrid ARQ, fast cell selection and fast scheduling) to improve performance. In addition, future 3G networks must provide the necessary framework to allow operators to offer Quality of Service (QoS) based applications. Service differentiation will also become necessary so that operators can provide differing service levels based on user classes. Pricing will be based on these user classes so that the operators can optimize their revenue. Typically, the shared forward link channel will be the bottleneck resource and hence usage of this resource must be optimally managed. This means that admission controls must be used to ensure that admitted users receive their QoS guarantees for the duration of their connection. If Class-Based Grade of Service (GoS) is offered then the admission control algorithm must also provide class dependent connection blocking rates. In this paper we present a framework that allows an operator to provide Class-Based connection admissions.