Network Congestion Detection via Jitter Spectrum Analysis

The patent introduces jitter (variation in packet arrival time) as an intermediary indicator to detect congestion. Instead of directly relying on packet loss, the system uses jitter measurements as a mediator that reflects network congestion conditions without directly impacting real-time media quality. This allows congestion detection while maintaining acceptable performance for delay-sensitive applications.

The patent implements dynamic rate adjustment based on real-time jitter measurements. Instead of using fixed AIMD parameters, the system dynamically modifies the congestion window adjustment strategy based on the current network conditions detected through jitter analysis. This allows for more flexible and adaptive rate control that can restore throughput faster while maintaining congestion control effectiveness.

The patent changes the fundamental parameter used for congestion detection from packet loss to jitter. This parameter change enables the system to maintain smooth rate adjustments while making congestion detection suitable for real-time media applications. The jitter-based approach provides continuous feedback that works well with rate smoothing algorithms without the drawbacks of packet loss-based methods.

The patent applies preliminary action by using jitter measurements that start changing before actual packet loss occurs. Since jitter increases as packets queue up in buffers before being dropped, the system can detect congestion conditions in advance and trigger rate control mechanisms proactively. This preliminary detection prevents the application from stopping work by enabling earlier intervention.