Adaptive prioritized admission over CDMA [cellular radio applications]
The TDMA-based dynamic guard channel scheme supports prioritized call admission control and adapts new call and handoff request admission priorities in response to nonstationary request arrivals or loading. We present an adjusted multimode dynamic guard bandwidth (AM-DGB) scheme that extends the blocked-calls-dropped dynamic guard bandwidth concept to CDMA-based systems, supporting multiple admission priority classes, based on request types and traffic classes. AM-DGB employs operation modes that temporarily block one or more lower-priority classes completely when pure dynamic guard operation is unable to keep long-term blocking rates under predefined targeted thresholds. Analytical and simulation results show that AM-DGB is able to maintain consistent performance guarantees in terms of dropping probabilities.