Sidelink Phase Error Tracking for Multi-Panel Wireless UEs
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Solution Overview
Problem
In wireless communications, especially in sidelink operations with multi-panel configurations, existing systems face challenges in accurately tracking frequency drift, phase noise, and timing errors between different user equipment (UE) panels, leading to inaccuracies in signal reception and decoding.
Innovation Solution
A method where a first UE transmits a capability message indicating the parameter configuration for each phase error process, including frequency offset, timing error, and phase noise parameters, to a second UE, allowing the second UE to monitor and adjust for these errors during sidelink transmissions, thereby improving reception accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multi-panel operation is used in sidelink communications, then communication versatility and spatial coverage are improved, but frequency drift, phase noise, and timing errors between panels increase tracking difficulty
Solution Approach 1:
The patent segments the phase error tracking into separate processes for each panel. Each panel is assigned its own phase error process (first phase error process for first panel, second phase error process for second panel), allowing independent tracking and compensation of frequency drift, phase noise, and timing errors specific to each panel's oscillator characteristics.
Solution Approach 2:
The patent applies local quality by assigning panel-specific phase error processes to each panel. Instead of using a single unified tracking approach, each panel receives tailored tracking parameters (frequency offset, phase noise, timing error) that are locally optimized for that panel's specific oscillator characteristics and environmental conditions.
2Measurement precision
If panel-specific phase error processes are implemented, then tracking precision is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by configuring phase error processes in advance before actual communication occurs. The first and second phase error processes are set up with their respective parameters (frequency offset, phase noise, timing error) prior to sidelink transmission, enabling precise tracking without increasing operational complexity during data communication.
Solution Approach 2:
The patent uses parameter changes by dynamically adjusting tracking parameters based on the selected phase error process. The receiver monitors which phase error process is active and adjusts frequency offset, phase noise compensation, and timing error parameters accordingly, allowing precise tracking while managing complexity through parameter adaptation rather than structural complexity.
3Measurement precision
If frequency offset and timing error are compensated for, then signal reception accuracy is improved, but processing time and computational complexity increase
Solution Approach 1:
The patent applies continuity of useful action by implementing continuous phase error compensation throughout the communication process. The phase error processes continuously track and compensate for frequency drift, phase noise, and timing errors in real-time, ensuring consistent signal reception accuracy without intermittent processing gaps that would increase overall processing time.
Solution Approach 2:
The patent uses feedback mechanisms where the receiver monitors the actual phase errors and adjusts compensation parameters accordingly. The feedback loop continuously refines frequency offset, phase noise, and timing error compensation based on measured deviations, improving reception accuracy while optimizing processing efficiency through adaptive rather than fixed computational approaches.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may transmit a capability message indicating a parameter configuration for each phase error process of a set of phase error processes of the first UE. The first UE may transmit, to a second UE, a phase error process indicator to indicate that the first UE is using a first phase error process of the set of phase error processes to generate a sidelink transmission in accordance with the parameter configuration for the first phase error process. The second UE may monitor, via a sidelink channel, for the sidelink transmission based on frequency tracking, phase tracking, time tracking, or any combination thereof being performed in accordance with the parameter configuration for the first phase error process. The first UE may transmit, via the sidelink channel, the sidelink transmission to the second UE.