Pilot Allocation Sizes for Phase Noise Mitigation
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Solution Overview
Problem
Current wireless communication systems face challenges in effectively mitigating phase noise, which affects the accuracy of phase tracking reference signals, leading to reduced spectral efficiency and increased resource consumption in 5G and New Radio (NR) networks.
Innovation Solution
The method involves transmitting and receiving indications of pilot allocation sizes for frequency-domain contiguous pilots based on phase noise characteristics, allowing for dynamic adjustment of pilot allocation sizes to optimize phase noise mitigation across different data modulation and coding schemes, thereby improving spectral efficiency and reducing resource consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pilot allocation sizes are increased to improve phase noise mitigation, then phase tracking accuracy is improved, but spectral efficiency and resource utilization deteriorate
Solution Approach 1:
The patent implements dynamic pilot allocation where the base station adjusts pilot allocation sizes based on real-time phase noise characteristics reported by the UE. The system transitions from static to dynamic resource allocation, allowing pilot sizes to adapt to changing channel conditions and phase noise levels, thereby optimizing the balance between phase tracking accuracy and spectral efficiency
Solution Approach 2:
The patent changes the parameter of pilot allocation size based on phase noise characteristics. The base station receives phase noise indicators from the UE and adjusts the pilot allocation size parameter accordingly, using larger allocations when phase noise is high and smaller allocations when phase noise is low, thus resolving the contradiction between tracking accuracy and resource efficiency
2Measurement precision
If pilot allocation sizes are increased to improve phase noise mitigation, then phase tracking accuracy is improved, but resource consumption increases
Solution Approach 1:
The patent dynamically changes the pilot allocation size parameter based on measured phase noise characteristics. When phase noise characteristics indicate low interference, the system reduces pilot allocation size, thereby decreasing resource consumption while maintaining adequate phase tracking accuracy. This parameter adaptation resolves the contradiction between measurement precision and resource quantity
3Device complexity
If fixed pilot allocation sizes are used for all data MCSs, then system complexity is reduced, but adaptability to different phase noise conditions deteriorates
Solution Approach 1:
The patent introduces dynamic adaptability to different data MCSs by allowing the base station to configure different pilot allocation sizes for different modulation and coding schemes. The system becomes adaptive to varying phase noise conditions associated with different MCS levels, resolving the contradiction between simplicity and versatility through controlled dynamic behavior
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit an indication associated with phase noise characteristics of the UE. The UE may receive an indication of pilot allocation sizes, for different data modulation and coding schemes (MCSs) for communications, of frequency-domain contiguous pilots for phase noise mitigation based at least in part on the indication associated with the phase noise characteristics of the UE. Numerous other aspects are described.