Uplink Buffer Status Reporting for Grant-Skipping Ambiguity
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Solution Overview
Problem
In wireless communication systems, there is ambiguity regarding uplink grant skipping due to logical channel prioritization functions preventing data transmission on allocated resources, leading to inappropriate resource management by base stations.
Innovation Solution
A method and apparatus to determine if buffered data is available but cannot be transmitted over allocated resources, using logical channel prioritization functions and processing or power limitations, and transmit a buffer status report to indicate this, allowing the base station to adjust resource allocation accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If logical channel prioritization functions are applied to allocate resources, then resource allocation efficiency is improved, but ambiguity arises regarding whether buffered data is unavailable or transmission is restricted
Solution Approach 1:
The patent introduces an intermediary indicator (new logical channel identifier or new field in BSR MAC CE) that acts as a mediator between the logical channel prioritization function and the base station. This indicator conveys the specific reason why data cannot be transmitted, distinguishing between data unavailability and transmission restrictions, thereby resolving the information ambiguity while maintaining resource allocation efficiency.
Solution Approach 2:
The patent segments the buffer status report by introducing separate indicators for different logical channels or data conditions. This segmentation allows the base station to receive detailed information about which specific logical channels have data availability issues and what type of restriction applies, enabling more precise resource management decisions.
2Device complexity
If base station assumes data unavailability when uplink transmission is skipped, then resource management is simplified, but resource allocation becomes inappropriate due to misinterpretation
Solution Approach 1:
The patent implements a feedback mechanism where the user equipment sends an indicator back to the base station explaining why uplink transmission is not available. This feedback distinguishes between data unavailability and transmission restrictions, allowing the base station to make accurate resource allocation decisions without increasing overall system complexity.
3Reliability
If buffered data cannot be transmitted due to processing or power limitations, then system reliability is improved, but resource utilization deteriorates
Solution Approach 1:
The patent enables preliminary action by allowing the user equipment to proactively inform the base station about processing or power limitations before transmission attempts fail. This advance notification allows the base station to adjust resource allocation in advance, preventing wasted transmission opportunities while maintaining system reliability under processing or power constraints.
Data Source
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AI summary
The disclosure relates a method comprising: determining that buffered data is available for transmission and cannot be transmitted over allocated resources; and causing information indicating that buffered data is available for transmission and cannot be transmitted over allocated resources to be transmitted over the allocated resources.