Buffer Status Report Priority Selection Mechanism
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Solution Overview
Problem
In the LTE mobile communication system, when the sum of Buffer Status Reports (BSRs) qualified for triggering and those marked as pending exceeds one, it can lead to resource waste and system errors, affecting resource utilization efficiency and stability.
Innovation Solution
A method is introduced where a type priority sequence of BSRs is determined, and based on this sequence, one BSR is selected and processed, ensuring that only the highest priority BSR is sent when multiple triggering conditions are met, thereby avoiding simultaneous sending of multiple BSRs and reducing resource waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple BSRs are triggered simultaneously and all are sent, then complete buffer status information is provided to the base station, but resource waste occurs and system stability deteriorates
Solution Approach 1:
The patent segments the simultaneous BSR transmissions into separate, sequential transmissions by introducing a priority-based selection mechanism. When multiple BSRs are triggered simultaneously, only the highest priority BSR is selected for immediate transmission, while other BSRs are deferred to subsequent transmission opportunities. This segmentation prevents resource waste from simultaneous transmissions while ensuring that critical buffer status information is prioritized.
Solution Approach 2:
The patent changes the transmission parameter from 'all triggered BSRs simultaneously' to 'selected BSR based on priority sequence'. By introducing a priority sequence parameter that ranks different BSR types (Regular BSR > Periodic BSR > Padding BSR), the system transforms the transmission behavior from sending all BSRs at once to sending only the highest priority BSR first, thereby reducing resource consumption while maintaining system reliability.
2Loss of information
If all triggered BSRs are sent simultaneously, then comprehensive buffer status reporting is achieved, but device complexity and processing overhead increase
Solution Approach 1:
The patent applies preliminary action by pre-establishing a priority sequence for different BSR types before actual transmission occurs. The priority sequence (Regular BSR > Periodic BSR > Padding BSR) is defined in advance, so when multiple BSRs are triggered simultaneously, the terminal can immediately identify which BSR to send first without complex real-time decision-making. This preliminary classification simplifies the processing complexity while ensuring that the most important buffer status information is transmitted first.
3Productivity
If BSR transmission is deferred when no uplink resources are available, then resource utilization efficiency improves, but information freshness deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the terminal monitors uplink resource availability and adjusts BSR transmission timing accordingly. When uplink resources are unavailable, the terminal defers BSR transmission and marks the BSR status as pending. Once uplink resources become available, the deferred BSR is transmitted immediately. This feedback-based approach ensures that BSR transmissions occur at optimal times when resources are available, improving resource utilization efficiency while minimizing delays through immediate transmission upon resource availability.
Data Source
AI summary
A method and device of sending Buffer Status Reports (BSRs) are provided herein. The method includes: determining the type priority sequence of BSR by a user terminal, and selecting and processing one BSR based on the type priority. A user device is also provided. The provided method and device may reduce resource waste because there is no situation that at least two BSRs sending processes are triggered at one time and at least two BSRs are sent at one time.