Priority-Aware Buffer Status Reporting for Delay-Sensitive Traffic
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Solution Overview
Problem
Existing buffer status reporting (BSR) mechanisms in wireless communication systems face issues with excessive delays and overreporting, particularly for delay-sensitive traffic, due to triggers based on high-priority data arrival or timer expiry, which are impractical to manage across various traffic scenarios.
Innovation Solution
Implementing a BSR triggering mechanism that considers logical channel priority and constraints, such as BSR quantity and time thresholds, leaky bucket regulators, and AI/ML models, to determine when to transmit a BSR, reducing delays and overreporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If BSR is triggered based on high-priority data arrival or timer expiry, then buffer status reporting is ensured, but transmission delays increase and overreporting occurs
Solution Approach 1:
The patent changes the triggering parameters of BSR from traditional timer-based or simple priority-based triggers to a more sophisticated mechanism that considers logical channel priority levels, buffer status thresholds, and traffic patterns. This allows the system to adapt reporting frequency and timing based on actual traffic conditions, reducing unnecessary reports while ensuring timely reporting for delay-sensitive traffic.
Solution Approach 2:
The patent implements dynamic BSR triggering where the reporting behavior adapts to changing traffic conditions. The system dynamically adjusts whether to trigger a BSR based on current buffer status, logical channel priorities, and traffic patterns, rather than following fixed timer intervals. This dynamic approach reduces delays for high-priority traffic while avoiding overreporting during low-activity periods.
2Loss of time
If BSR is triggered frequently to reduce delays, then timely reporting is achieved, but resource overhead increases due to overreporting
Solution Approach 1:
The patent introduces threshold parameters and priority-level parameters that control BSR triggering. By changing from fixed-frequency triggering to threshold-based triggering with priority awareness, the system reports only when necessary conditions are met, reducing signaling overhead while maintaining timeliness for urgent traffic.
Solution Approach 2:
The patent applies partial action by triggering BSR only for specific logical channels with delay-sensitive traffic when their buffer status exceeds thresholds, rather than reporting all buffer status uniformly. This selective approach reduces overall reporting frequency and resource overhead while ensuring timely reporting where needed.
3Device complexity
If traditional BSR triggering mechanisms are used, then implementation is simple, but they are impractical for various traffic scenarios
Solution Approach 1:
The patent enhances the BSR mechanism by introducing configurable parameters such as logical channel priority levels, buffer status thresholds, and traffic pattern indicators. These parameters enable the system to adapt to different traffic scenarios (e.g., delay-sensitive, bulk data, periodic traffic) while maintaining a relatively simple core triggering mechanism based on modified conditions.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may generate, responsive to obtaining data associated with a first logical channel (LCH), a buffer status report (BSR) based at least in part on any LCH associated with any pending BSR having a priority that is lower than a priority of the first LCH and based at least in part on a BSR triggering constraint. The UE may transmit the BSR. Numerous other aspects are described.