Dynamic MCS Adjustment for 5G Uplink Configured Grants
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Solution Overview
Problem
5G networks face reduced uplink spectral efficiency due to the modulation and coding scheme (MCS) zero, which provides excessive redundancy, affecting communication latency and reliability.
Innovation Solution
Adaptive assignment of MCS based on channel condition reports and interference levels for user equipment (UE), determining the uplink radio condition to optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MCS zero scheme is used for uplink configured grants, then communication reliability is improved through multiple redundancy bits, but uplink spectral efficiency deteriorates
Solution Approach 1:
The patent implements dynamic MCS adjustment by transitioning from a static MCS zero scheme to a dynamic selection mechanism that adapts MCS indices based on real-time uplink radio conditions, channel quality indicators (CQI), and interference levels, thereby optimizing the trade-off between reliability and spectral efficiency
Solution Approach 2:
The patent changes the MCS parameter from a fixed value (MCS zero) to variable values selected from multiple MCS schemes based on channel conditions, allowing the system to adjust the number of redundancy bits and modulation order according to actual radio environment quality
2Speed
If configured grant scheduling is implemented to reduce latency, then communication speed is improved, but resource allocation flexibility deteriorates due to pre-allocated resource blocks
Solution Approach 1:
The patent uses preliminary resource block allocation through configured grants to enable immediate uplink transmission without scheduling delay, while simultaneously implementing dynamic MCS selection to provide adaptability within the pre-allocated resources based on real-time channel conditions
Data Source
AI summary
Aspects provided herein provide methods, systems, and a non-transitory computer storage media storing instructions for adaptably assigning a modulation and coding scheme (MCS). The method begins with receiving an uplink message from at least one user equipment (UE) device. The method also includes receiving a first channel condition report from the at least one UE. A first level of interference for the at least one UE is then determined. The method further provides for determining an uplink radio condition for the at least one UE, based on the channel condition report and the level of interference. Based on the uplink radio condition a first MCS is assigned to the UE.