V2X UE Power Control via Priority-Based SCI Overlap Resolution
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Solution Overview
Problem
Current power control methods for Vehicle-to-everything (V2X) communications in next-generation wireless systems face challenges in efficiently managing power transmission, particularly in scenarios where multiple Radio Access Technologies (RATs) overlap, leading to conflicts and suboptimal resource allocation.
Innovation Solution
A user equipment (UE) is configured to receive Sidelink Control Information (SCI) from multiple RATs, determining whether to drop one transmission based on priority values when physical channels overlap, using equations to calculate optimal transmit power for V2X physical channels and Reference Signals, and employing power boosting operations to enhance reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple RAT transmissions are maintained simultaneously, then communication reliability is improved, but power consumption and resource allocation efficiency deteriorate
Solution Approach 1:
The patent changes the parameter of transmit power dynamically by comparing priority values of overlapping transmissions from different RATs. When a high-priority transmission is detected, the system adjusts power allocation to maintain reliability for critical communications while reducing power for lower-priority transmissions, thus resolving the contradiction between reliability and power consumption.
Solution Approach 2:
The system implements dynamic power control by continuously monitoring overlapping transmissions and adjusting transmit power in real-time based on priority comparisons. This dynamic adjustment allows the system to maintain high reliability when needed while optimizing power consumption during normal operations, preventing simultaneous full-power transmissions of multiple RATs.
2Reliability
If multiple RAT transmissions are maintained simultaneously, then communication coverage is improved, but resource allocation efficiency deteriorates
Solution Approach 1:
The patent changes the parameter of resource allocation by introducing priority-based power control mechanisms. When overlapping transmissions are detected, the system modifies resource allocation parameters (transmit power levels) based on priority values, ensuring that critical communications receive adequate resources while lower-priority transmissions are scaled back, thus improving overall resource allocation efficiency.
Solution Approach 2:
The system implements dynamic resource allocation by continuously adapting transmit power levels based on real-time detection of overlapping transmissions and their priority values. This dynamic approach allows the system to maintain communication coverage through multiple RATs while efficiently allocating resources according to actual network conditions and service priorities.
3Reliability
If transmit power is increased for V2X transmissions, then transmission reliability is improved, but interference to other RATs deteriorates
Solution Approach 1:
The patent changes the parameter of transmit power dynamically based on priority comparisons of overlapping transmissions. When a high-priority V2X transmission is detected, the system increases power for that specific transmission while simultaneously reducing or dropping lower-priority transmissions from other RATs, thereby maintaining transmission reliability for critical communications while minimizing interference to other systems.
Solution Approach 2:
The system implements dynamic power control that adapts transmit power levels in real-time based on the detection of overlapping transmissions and their priority values. This dynamic approach ensures that power is increased for high-priority V2X transmissions when needed, while automatically reducing power for lower-priority transmissions to minimize interference, thus resolving the contradiction between transmission reliability and interference generation.
Data Source
AI summary
A method performed by a user equipment (UE) is disclosed. The method includes receiving, using a first RAT, first SCI including a first priority value, and receiving, using a second RAT, second SCI including a second priority value. The method also includes determining whether to drop one of a transmission of a first physical channel derived from the first SCI and a transmission of a second physical channel derived from the second SCI based on the first priority value and the second priority value when the first physical channel overlaps the second physical channel in the time domain.