Sidelink Buffer Status Reporting in D2D Communication Systems

The patent segments the buffer status reporting by introducing separate BSR mechanisms for different logical channels and priority levels. Each BSR report contains specific information about buffer status for particular logical channels, allowing the system to manage complex multi-UE resource allocation through structured, segmented reporting rather than monolithic status updates.

The patent adds dimensional structure to buffer status reporting by introducing priority levels, logical channel identifiers, and UE-specific indices into the BSR framework. This multi-dimensional approach transforms simple buffer status into a structured report that captures the complexity of shared resource management across multiple UEs, priorities, and channels without overwhelming the control signaling.

The patent implements partial reporting by allowing UEs to report buffer status selectively based on priority thresholds and logical channel configurations. Instead of reporting all buffer statuses unconditionally, the system triggers BSR reports only when specific conditions are met (e.g., buffer threshold exceeded, priority level requires reporting), reducing signaling overhead while maintaining data transmission efficiency for critical channels.

The BSR mechanism is segmented into logical channel-specific reports with priority-based filtering. Each BSR message contains only the relevant buffer status information for specific logical channels that meet reporting criteria, avoiding transmission of redundant or low-priority status information and thereby reducing overall signaling overhead.

The patent applies local quality by assigning different priority levels and QoS parameters to different logical channels and UEs. Each UE and logical channel receives localized resource allocation rules based on its specific requirements, allowing the system to achieve fairness and reliability through differentiated local policies rather than uniform global management, thereby reducing overall complexity.

The BSR mechanism provides continuous feedback to the scheduler about buffer status across multiple UEs and logical channels. This feedback enables the scheduler to dynamically adjust resource allocation to maintain fairness and reliability, with the structured BSR reports making the feedback process manageable despite the multi-UE complexity.