Sidelink Buffer Status Report Link-Specific Cancellation

The patent segments the SL BSR cancellation mechanism by introducing a link identifier (link-ID) to associate each BSR with its specific direct link. Instead of cancelling all BSRs globally, the system now cancels only the BSR corresponding to the failed link, while preserving BSRs for other active links. This segmentation resolves the contradiction by maintaining simplified control through structured identification while eliminating unnecessary transmission delays for unaffected data streams.

The patent applies local quality by making the BSR cancellation scope link-specific rather than global. Each direct link maintains its own BSR state independently, allowing the system to apply cancellation locally only where needed (failed link) while preserving quality of service for other links. This localized approach eliminates the blanket cancellation problem while maintaining manageable complexity through link-specific tracking.

The patent extracts the link identification information (link-ID) from the BSR structure, enabling the system to identify and remove failed links from the active BSR list. When a link fails, the corresponding BSR is extracted and cancelled individually, preventing unnecessary SL grant transmissions for that specific link while maintaining resource allocation for successful links. This extraction mechanism eliminates energy waste while preserving reliable resource allocation.

The patent implements feedback by monitoring the transmission status of each direct link and using this information to control BSR cancellation. When transmission failure is detected on a specific link, the system provides feedback by cancelling only the BSR associated with that link, rather than generating unnecessary grants for all links. This feedback mechanism ensures reliable resource allocation for successful transmissions while avoiding energy waste on failed links.