Radio Network Controller Overload Control via Selective Base Station Admission

The patent applies local quality by implementing call admission control selectively at individual base stations experiencing overload conditions, rather than uniformly across the entire network. The radio network controller identifies specific base stations with high traffic load and sends targeted control signals only to those stations, allowing localized overload management while maintaining simplicity in the overall control system.

The patent implements partial action by applying call admission control only to base stations that exceed a predetermined traffic threshold, rather than uniformly limiting all base stations. The radio network controller monitors traffic load and selectively restricts new call connections only in those base stations where the total transmitting output approaches maximum capacity, thereby preventing amplifier deterioration only where necessary while maintaining full service availability in underutilized base stations.

The patent applies preliminary action by having base stations continuously monitor and report their traffic load conditions to the radio network controller in advance. The controller maintains updated information about the transmitting output status of each base station, enabling it to proactively send call admission control signals before overload conditions actually occur, thus preventing the need for reactive control adjustments and reducing overall response time.