Uplink Data Priority Handling in LTE Buffer Status Reporting
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Solution Overview
Problem
In LTE systems, the segmentation of uplink data on high-priority logical channels is delayed, and redundancy in scheduled resources occurs due to the periodic Buffer Status Report (BSR) being reported at a higher priority than the logical channel's priority, causing inefficient resource allocation and data transmission.
Innovation Solution
A data transmission method and device that determine the priority of uplink data relative to the periodic BSR, sending data at a higher priority when necessary to avoid segmentation and redundancy, and calculating the to-be-scheduled uplink data amount to exclude overlapping data, ensuring efficient resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the periodic BSR is reported at a priority higher than the logical channel priority, then the base station can learn the uplink data amount in time, but the uplink data on high-priority logical channels is segmented and sending is delayed
Solution Approach 1:
The patent inverts the traditional priority relationship between periodic BSR and uplink data. Instead of always giving periodic BSR higher priority, the patent makes uplink data on high-priority logical channels take precedence over periodic BSR reporting. This inversion resolves the contradiction by preventing data segmentation while still enabling timely BSR reporting when data priority is lower.
2Reliability
If the periodic BSR is reported at a priority higher than the logical channel priority, then the base station can learn the uplink data amount in time, but the uplink data on high-priority logical channels is segmented and sending is delayed
Solution Approach 1:
The patent inverts the traditional priority relationship between periodic BSR and uplink data. Instead of always giving periodic BSR higher priority, the patent makes uplink data on high-priority logical channels take precedence over periodic BSR reporting. This inversion resolves the contradiction by preventing data segmentation while still enabling timely BSR reporting when data priority is lower.
3Ease of operation
If the base station schedules uplink data based on the periodic BSR, then the base station can allocate resources according to buffered data amount, but redundancy of scheduled resources is caused due to overlapping uplink data
Solution Approach 1:
The patent extracts and excludes the uplink data amount that has already been scheduled from the periodic BSR reporting. The base station calculates the scheduled uplink data amount based on previously sent uplink grants and subtracts it from the total buffered data amount in the periodic BSR. This extraction eliminates redundant resource scheduling while maintaining ease of resource allocation based on actual unscheduled data.
Data Source
AI summary
A method includes when a triggering instruction for triggering a periodic (buffer status report) BSR is received, obtaining a priority of a logical channel to which uplink data that is being sent belongs, and obtaining a priority of a logical channel to which the periodic BSR belongs, determining whether a priority of the uplink data is higher than a priority of the periodic BSR, and sending the uplink data to a base station at a priority higher than the priority of the periodic BSR when the priority of the uplink data is higher than the priority of the periodic BSR, or sending the periodic BSR to a base station at a priority higher than the priority of the uplink data when the priority of the uplink data is lower than the priority of the periodic BSR.