New Radio Buffer Status Report and Scheduling Request Mechanisms
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Solution Overview
Problem
Current buffer status report (BSR) and scheduling request (SR) solutions in new radio (NR) communications do not provide the desired level of speed or customization for efficient operation, leading to inefficiencies in wireless communication networks.
Innovation Solution
Proposed techniques include extending SR with additional information to help base stations schedule more efficiently, introducing a new event-based BSR triggering condition, and customizing BSR and SR modifications for different numerologies and transmission time intervals, allowing for per logical channel basis reporting and using enhanced SR to indicate new beam selection after beam failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If current BSR and SR solutions are used in NR, then basic scheduling function is provided, but scheduling speed and efficiency are insufficient
Solution Approach 1:
The patent applies preliminary action by having the UE indicate buffer status and scheduling needs in advance through enhanced SR and BSR mechanisms before actual data transmission is required. This allows the gNB to prepare resource allocation ahead of time, reducing scheduling latency and improving scheduling efficiency.
Solution Approach 2:
The patent implements feedback mechanisms where the UE continuously reports buffer status information to the gNB through enhanced BSR procedures. This feedback loop enables the gNB to adjust scheduling decisions in real-time, optimizing both scheduling efficiency and reducing latency based on actual buffer conditions.
2Speed
If traditional time-based BSR triggering is used, then implementation is simple, but data reporting speed is slow
Solution Approach 1:
The patent applies dynamics by transitioning from static time-based triggering to dynamic event-driven triggering. The BSR is now triggered based on actual buffer status changes and data arrival events, allowing the reporting mechanism to adapt its behavior dynamically to real-time network conditions and data patterns, thereby increasing reporting speed.
Solution Approach 2:
The patent implements self-service by enabling the UE to autonomously determine when buffer status changes occur and initiate BSR transmissions based on actual data arrival events. This self-triggering mechanism eliminates the need for complex external timing control, simplifying the overall system while dramatically improving data reporting speed.
3Measurement precision
If per logical channel BSR reporting is implemented, then resource allocation accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent applies segmentation by dividing the buffer status report into separate logical channel level reports rather than a single aggregated report. This allows precise tracking of buffer status for each logical channel, improving resource allocation accuracy while enabling selective reporting only for channels with actual data, thus managing signaling overhead.
Solution Approach 2:
The patent implements local quality by tailoring the level of detail in BSR reporting to the specific requirements of each logical channel. Different logical channels can have different reporting granularities based on their data characteristics and QoS requirements, optimizing both accuracy for critical channels and overall signaling efficiency.
Data Source
AI summary
Various techniques are proposed to enhance or expand the capabilities or usage of buffer status request (BSR) and scheduling request (SR) in new radio (NR) applications. In an implementation, techniques are proposed to extend the SR in long term evolution (LTE) baseline with additional information to help a base station (e.g., gNB) schedule faster and more efficiently. Moreover, a new BSR triggering condition is proposed to report new data based on particular events instead of being time-based. Modifications being proposed to both BSR and SR can be customized for different numerologies/transmission time intervals (TTIs). Modifications being proposed to SR can also be used to indicate a user equipment (UE) new beam selection after recovering from a beam failure.