Adaptive Packet Buffer Control for Network Switch Traffic Congestion

The patent implements dynamic buffer allocation where buffer sizes are not fixed but adapt based on real-time traffic conditions. The system continuously monitors queue depths, packet types, and traffic patterns, then adjusts buffer allocations accordingly. This dynamic approach allows the switch to optimize network performance under varying load conditions while managing complexity through automated control algorithms.

The patent employs feedback mechanisms where the buffer control system monitors network traffic conditions, queue depths, and performance metrics, then uses this information to adjust buffer allocations. The system detects congestion patterns and packet loss events, feeds this information back to the buffer management algorithm, which then modifies allocation strategies to prevent future congestion and improve overall network performance.

The patent introduces an intermediary buffer management system that sits between loop detection mechanisms and traffic forwarding. When loops are detected, instead of immediately blocking ports, the system uses buffered traffic management to handle looped packets, allowing legitimate traffic to continue flowing while isolating problematic loop traffic. This intermediary approach maintains network reliability while preserving throughput for non-loop traffic.

The patent segments network traffic into different queues and buffers, allowing selective handling of different traffic types. When loops are detected in specific segments, only those particular traffic flows are restricted while other segments continue to operate normally. This segmentation enables the system to maintain reliability by preventing loop propagation while preserving network productivity through continued operation of unaffected segments.

The patent changes key parameters of buffer management including allocation sizes, threshold values, and priority weights based on traffic conditions and QoS requirements. By dynamically adjusting these parameters, the system can guarantee bandwidth for critical multimedia traffic while allowing best-effort service for less time-sensitive data, effectively managing QoS delivery even when total available bandwidth is limited due to oversubscription.

The patent implements local quality differentiation where different buffers and queues receive different treatment based on their specific requirements. Critical multimedia traffic receives prioritized buffer allocation and protection from congestion, while less critical traffic receives standard or reduced allocation. This local quality approach ensures reliable QoS delivery for important applications while managing overall bandwidth constraints through differentiated service levels.