Uplink Buffer Status Signaling 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 and resource type restrictions, leading to inappropriate resource management by base stations.
Innovation Solution
User equipment determines if buffered data can be transmitted over allocated resources based on logical channel prioritization functions and resource types, and sends a buffer status report with specific indications to the base station, allowing the base station to adjust resource allocation accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If user equipment transmits buffered data over allocated resources, then resource utilization is improved, but ambiguity arises when data cannot be transmitted due to logical channel prioritization restrictions
Solution Approach 1:
The patent segments the buffer status report into multiple parts: a first indication signal about buffer status and a second indication signal about transmission capability. This segmentation allows the base station to distinguish between cases where data is unavailable versus cases where data is available but cannot be transmitted due to prioritization restrictions, thereby resolving the ambiguity while maintaining resource utilization efficiency.
Solution Approach 2:
The patent introduces an intermediary indication mechanism (the second indication signal) that mediates between the user equipment's buffer status and the base station's resource allocation decisions. This intermediary provides additional context about whether buffered data can actually be transmitted, enabling more accurate resource management without losing information about the true transmission capability.
2Productivity
If base station allocates resources based on buffer status reports, then resource allocation efficiency is improved, but inappropriate resource management occurs due to ambiguity in report interpretation
Solution Approach 1:
The patent implements a feedback mechanism where the user equipment provides not only buffer status information but also transmission capability indication to the base station. This enhanced feedback loop allows the base station to make more accurate resource allocation decisions by understanding both what data is available and whether it can be transmitted, thereby improving resource management accuracy while maintaining allocation efficiency.
Solution Approach 2:
The patent replaces the ambiguous mechanical interpretation of buffer status reports with a more precise signaling mechanism. Instead of relying on the base station to infer transmission capability from buffer status alone, the system substitutes this inference mechanism with explicit indication signals that directly convey whether data can be transmitted, improving reliability of resource management.
3Measurement precision
If user equipment sends detailed buffer status information, then base station can make accurate resource decisions, but signaling overhead increases
Solution Approach 1:
The patent applies partial action by sending only the necessary indication signals rather than complete detailed information. The first indication signal provides essential buffer status information, and the second indication signal provides transmission capability when relevant. This partial signaling approach achieves sufficient measurement precision for resource allocation without incurring the overhead of transmitting exhaustive buffer details in all cases.
Data Source
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.