Modem Buffer Threshold Control for Uplink Data Management

The patent implements dynamic adjustment of feedback request rates based on the current buffer status. When the buffer is approaching capacity, the feedback request rate is increased to accelerate the clearing of acknowledged data. This dynamic control mechanism allows the system to adapt to varying buffer conditions and maintain optimal performance without sacrificing data rate improvements.

The patent introduces a feedback mechanism where the UE monitors its own buffer status and sends feedback request messages to the base station when the buffer threshold is approached. This feedback loop enables the system to proactively manage buffer occupancy by triggering earlier feedback requests, thereby preventing buffer overflow while maintaining high data rates.

The patent changes the parameter of feedback request rate dynamically based on buffer occupancy levels. Instead of using a fixed feedback rate, the system adjusts this parameter in real-time, increasing it only when necessary (when buffer threshold is approached) and reducing it when the buffer has sufficient capacity. This parameter change approach minimizes unnecessary signaling overhead while ensuring buffer management effectiveness.

The patent applies partial action by increasing the feedback rate only partially and only when necessary, rather than continuously maintaining a high feedback rate. The feedback request rate is adjusted proportionally to the buffer occupancy level, applying just enough control action to prevent buffer overflow without excessive signaling. This partial action principle optimizes the trade-off between buffer management and signaling overhead.