Buffer Status Report Triggering in Wireless Uplink
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Solution Overview
Problem
The current buffer status triggering mechanism in wireless communications systems is inefficient, leading to unnecessary uplink resource allocation and transmission delays due to incorrect triggering conditions, resulting in power consumption and delayed data transmission.
Innovation Solution
A method that modifies the buffer status reporting mechanism by triggering a Buffer Status Report (BSR) when uplink data becomes available for transmission and its corresponding logical channel has higher priority than existing data in the buffer, ensuring accurate resource allocation and reducing unnecessary reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a BSR is triggered when UL data becomes available for transmission, then the E-UTRAN can allocate uplink resources timely, but unnecessary uplink resource allocation and transmission delays occur due to incorrect triggering conditions
Solution Approach 1:
The patent modifies the triggering parameters of BSR by introducing logical channel priority comparison and buffer state conditions. Instead of triggering BSR solely based on data availability, the system now evaluates whether the new data belongs to a higher priority logical channel than existing buffer data, and whether the buffer is empty or contains lower priority data. This parameter-based filtering resolves the contradiction by ensuring BSR is triggered only when genuinely necessary, eliminating unnecessary transmissions while maintaining timely resource allocation for high-priority data.
2Measurement precision
If BSR is triggered more frequently to ensure accurate buffer status reporting, then resource allocation accuracy improves, but UE power consumption increases
Solution Approach 1:
The patent applies partial action by triggering BSR only in specific partial conditions rather than continuously or on every data arrival. The triggering occurs partially based on: (1) buffer being empty, (2) new data having higher priority than existing data, or (3) sufficient padding bits available. This selective partial triggering maintains reporting accuracy for critical scenarios while avoiding unnecessary transmissions that would consume UE power, thus resolving the contradiction between precision and energy consumption.
3Use of energy by moving object
If BSR triggering conditions are relaxed to reduce reporting overhead, then power consumption decreases, but resource allocation efficiency deteriorates
Solution Approach 1:
The patent introduces specific parameter thresholds and comparison conditions for BSR triggering. Instead of relaxed conditions, it implements intelligent parameter evaluation: comparing logical channel priorities, checking buffer emptiness, and evaluating padding bit sufficiency. These parameter changes ensure BSR is triggered with appropriate selectivity - not too frequently to conserve power, but not too sparingly to maintain allocation efficiency. The balanced parameter configuration resolves the contradiction by optimizing the trigger points.
4Loss of time
If Regular BSR is triggered upon data arrival in empty UE transmission buffer, then resource allocation timeliness improves, but unnecessary uplink transmissions occur
Solution Approach 1:
The patent implements feedback mechanisms by having the UE evaluate buffer state and data priority before triggering BSR. The system feedbacks on whether triggering is truly necessary by checking: is the buffer empty? Is the new data higher priority? Are there sufficient padding bits? This feedback loop prevents unnecessary BSR triggering while ensuring timely triggering when appropriate, resolving the contradiction between timing improvement and energy waste by making triggering decisions based on real-time buffer and priority feedback.
Data Source
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AI summary
A method for improving a buffer status triggering mechanism for a mobile device of a wireless communication system comprises triggering a buffer status report when uplink data becomes data available for transmission and a logical channel corresponding to data of the uplink data has higher priority than logical channels corresponding to data available for transmission already existed in a transmission buffer if there is already data available for transmission other than the uplink data included in the UE transmission buffer.