MCS and K1 Offset Adjustment for Inter-Carrier Interference Mitigation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in optimizing modulation and coding schemes (MCS) and K1 offset settings based on subcarrier spacing to mitigate inter-carrier interference (ICI) and improve communication efficiency.
Innovation Solution
The proposed solution involves an apparatus and method that dynamically adjust MCS and K1 offset settings based on the subcarrier spacing selected for communication with a base station. This adjustment limits MCS to be less than or equal to an MCS threshold and K1 offset to be greater than or equal to a K1 offset threshold, thereby reducing ICI and enhancing communication reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If higher MCS is used to increase data rate, then communication speed improves, but inter-carrier interference increases
Solution Approach 1:
The patent dynamically adjusts MCS parameters based on subcarrier spacing conditions. When subcarrier spacing indicates high ICI risk, the system automatically reduces MCS to prevent interference, thereby maintaining communication reliability while optimizing data rate according to channel conditions
2Loss of time
If smaller K1 offset is used to reduce latency, then communication efficiency improves, but reliability of ACK/NACK feedback deteriorates
Solution Approach 1:
The patent implements dynamic K1 offset adjustment based on subcarrier spacing and ICI conditions. The system selects appropriate K1 values from a set of configured offsets, adapting the feedback timing to balance latency requirements with reliability constraints under different channel conditions
3Device complexity
If fixed MCS and K1 offset settings are used to simplify configuration, then device complexity reduces, but communication efficiency deteriorates
Solution Approach 1:
The patent pre-configures multiple MCS and K1 offset parameter sets corresponding to different subcarrier spacing conditions. The UE reports capability information in advance, enabling the network to select appropriate parameters without real-time complex calculations, thus maintaining efficiency while managing complexity
Data Source
AI summary
Aspects presented herein may enable a UE to limit MCS and/or K1 offset used for communicating with a base station to a threshold based at least in part on an SCS used for the communication. In one aspect, a UE limit at least one of an MCS to being less than or equal to an MCS threshold or a K1 offset to being greater than or equal to a K1 offset threshold based on a subcarrier spacing selected for communication with a base station, the K1 offset being a number of slots between receiving DL data and transmitting ACK/NACK feedback. The UE communicate with the base station based at least on one of the MCS being less than or equal to the MCS threshold or the K1 offset being greater than or equal to the K1 offset threshold.