Sidelink Synchronization Coverage Extension Using Error-Based UE Selection
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Solution Overview
Problem
Existing communication systems face challenges in extending synchronization coverage for sidelink synchronization reference user equipment, particularly when one user equipment is out of coverage of a base station or global navigation satellite system, leading to synchronization errors that affect network performance.
Innovation Solution
An apparatus and method for determining synchronization errors between user equipment and adjusting transmission parameters to extend synchronization coverage by operating as a sidelink synchronization reference user equipment, based on error thresholds and signal indicators, to improve synchronization accuracy and coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If user equipment operates as a sidelink synchronization reference user equipment to extend synchronization coverage, then synchronization coverage is improved, but synchronization error increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting transmission parameters (such as transmission power, modulation scheme, and coding rate) based on the determined synchronization error and coverage extension conditions. This allows the system to optimize the balance between extending synchronization coverage and maintaining synchronization accuracy under different operational scenarios.
2Area of stationary object
If transmission parameters are adjusted to extend synchronization coverage, then coverage is improved, but system complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where the apparatus continuously monitors synchronization error and coverage extension conditions, then adjusts transmission parameters accordingly. This closed-loop feedback approach enables automatic optimization of synchronization performance without requiring complex manual configuration or excessive system complexity.
Data Source
AI summary
An apparatus and method are provided for determining that a second sidelink synchronization reference user equipment extends synchronization coverage of a first sidelink synchronization reference user equipment; for determining a first synchronization error between the first sidelink synchronization reference user equipment and the second sidelink synchronization reference user equipment and a second synchronization error between the first sidelink synchronization reference user equipment and the apparatus; and for determining whether to operate the apparatus as a sidelink synchronization reference user equipment and extend the synchronization coverage of the first sidelink synchronization reference user equipment based on the first synchronization error and the second synchronization error.