Sidelink Power Control Aligned With Uu Link Operation
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Solution Overview
Problem
Existing sidelink transmission power control methods in 5G V2X communication systems are inefficient, leading to limited data throughput due to inflexible power settings that do not account for the use of the Uu link by the base station.
Innovation Solution
A method for dynamically adjusting sidelink transmission power based on the use of the Uu link by the base station, using multiple power control parameters for different Uu link operations (DL, UL, or flexible link) to optimize interference management and enhance data throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fixed transmission power control is used for sidelink, then device complexity is reduced, but data throughput is limited due to inflexible power settings
Solution Approach 1:
The patent implements dynamic transmission power control for sidelink by allowing the terminal to select different power control parameters (p0-NSSCH-SL, alpha-NSSCH-SL) based on the current Uu link operation state (downlink, uplink, or flexible). This dynamic adaptation enables the system to optimize data throughput by adjusting power settings according to real-time network conditions, directly resolving the contradiction between fixed complexity and variable performance.
Solution Approach 2:
The patent changes the power control parameters (p0-NSSCH-SL, alpha-NSSCH-SL, pathlossReferenceSignal) based on the Uu link operation state. By switching between different parameter sets corresponding to different base station operations (DL, UL, or flexible), the system achieves flexible power control that adapts to varying traffic states, thereby improving data throughput without requiring complex real-time calculations at the terminal.
2Productivity
If transmission power is increased for sidelink, then data throughput is improved, but interference to base station operations increases
Solution Approach 1:
The patent implements a feedback mechanism where the base station monitors its own Uu link operation state and provides this information to the terminal. The terminal then uses this feedback to adjust sidelink transmission power appropriately. When the base station is performing downlink or uplink operations, the terminal reduces sidelink power to minimize interference, while still maintaining adequate throughput when the base station is in flexible state. This feedback-driven approach resolves the contradiction between throughput and interference.
Solution Approach 2:
The patent applies preliminary anti-action by having the terminal proactively adjust sidelink transmission power based on predicted or current base station operations. Before interference can occur, the terminal already has power control parameters configured that prevent harmful interference to base station operations. This is achieved by selecting power parameters that are appropriate for the current base station state, thereby preventing interference before it affects system performance.
3Object-affected harmful factors
If dynamic power adjustment based on base station operation is implemented, then interference management is improved, but device complexity increases
Solution Approach 1:
The patent segments the power control parameters into distinct sets corresponding to different base station operation states (downlink, uplink, flexible). Instead of implementing a complex continuous adjustment mechanism, the system divides power control into discrete parameter sets that can be selected based on the current state. This segmentation simplifies the terminal's decision-making process while still achieving effective interference management through state-based parameter selection.
Data Source
AI summary
This terminal comprises: a control circuit that controls transmission power of a sidelink on the basis of information about a power control method corresponding to the purpose of usage of a communication link at a base station; and a transmission circuit that carries out sidelink transmission in accordance with the control of the transmission power.