Uplink Scheduling Priority for BSR and PHR Reports
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Solution Overview
Problem
In LTE wireless communication systems, the lack of specified priority between Buffer Status Report (BSR) and Power Headroom Report (PHR) MAC control elements leads to insufficient uplink grants, causing inefficient resource scheduling and poor uplink transmission performance when both reports are triggered simultaneously.
Innovation Solution
Setting the resource allocation priority of the BSR MAC control element higher than the PHR MAC control element, ensuring that the BSR is transmitted with higher priority when uplink resources are allocated, even if the grant is insufficient to include both reports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If both BSR and PHR are triggered simultaneously without specified priority, then both reports need to be transmitted, but the uplink grant becomes insufficient and resource scheduling efficiency deteriorates
Solution Approach 1:
The patent changes the parameter of report priority by explicitly assigning higher priority to BSR than to PHR. This parameter change resolves the contradiction by ensuring that the more critical buffer status information is transmitted first, while power headroom information can be transmitted in subsequent opportunities, thus maintaining both reliability and scheduling efficiency.
2Productivity
If BSR is prioritized over PHR in resource allocation, then uplink transmission performance improves, but PHR transmission may be delayed
Solution Approach 1:
The patent applies partial action by transmitting only the most critical information (BSR) when resources are constrained, rather than attempting to transmit both reports simultaneously. This partial transmission of BSR ensures immediate uplink performance optimization, while PHR is transmitted in subsequent opportunities when resources are available, accepting controlled delay for less critical information.
3Device complexity
If no priority specification exists between BSR and PHR, then the system structure remains simple, but scheduling information handling becomes inefficient
Solution Approach 1:
The patent introduces a new parameter - priority level - to differentiate between BSR and PHR handling. This simple parameter change transforms the system from treating all reports equally to prioritizing critical buffer status information, thereby significantly improving scheduling information handling efficiency without complicating the overall system structure.
Data Source
AI summary
The present invention provides a method for handling scheduling information report in a user equipment (UE) of a wireless communication system. The method includes steps of triggering a Buffer Status Report (BSR), which is a Regular BSR, and a Power Headroom Report (PHR); and performing resource allocation when having uplink resource allocated for new transmission, wherein resource allocation priority of a MAC control element of the BSR is higher than that of the PHR.