SL-PRS Power Control Across Network Energy Modes
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Solution Overview
Problem
Existing wireless communication systems, particularly in the context of 5G, face challenges in efficiently managing network energy modes for sidelink positioning reference signals (SL-PRS) to balance positioning accuracy with power consumption, especially in scenarios involving vehicle-to-everything (V2X) communications.
Innovation Solution
The method involves user equipment (UE) operating in different network energy modes, adjusting SL-PRS transmit power and bandwidth allocation based on specific network energy modes, and applying power-saving modifications to slots with or without SL-PRS resources, enabling efficient sidelink positioning sessions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If SL-PRS transmit power is increased to improve positioning accuracy, then positioning accuracy is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic transmit power adjustment for SL-PRS based on network energy mode. The UE determines its transmit power level according to the currently active energy mode (first or second mode), allowing the system to adaptively balance positioning accuracy requirements against power consumption constraints rather than using a fixed power level
Solution Approach 2:
The patent changes the transmit power parameter of SL-PRS based on network energy mode. By switching between different power levels corresponding to different energy modes, the system can optimize the trade-off between positioning accuracy (requiring higher power) and power consumption (requiring lower power) according to current operational conditions
2Reliability
If network operates in high energy mode to maintain continuous positioning, then positioning accuracy is maintained, but energy consumption increases
Solution Approach 1:
The patent implements periodic switching between first and second energy modes for SL-PRS transmission. Instead of continuously operating in high energy mode, the system alternates between different energy modes, allowing the network to maintain positioning functionality while reducing overall energy consumption through periodic low-power operation
Solution Approach 2:
The network dynamically switches between different energy modes based on positioning requirements and traffic conditions. This dynamic mode selection allows the system to maintain positioning continuity when needed while reducing energy consumption during periods with lower positioning demands
3Measurement precision
If SL-PRS resources are allocated in all slots for continuous positioning, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments SL-PRS resource allocation by energy mode. Different energy modes correspond to different slot configurations for SL-PRS resources, allowing the system to provide continuous positioning when needed while reducing resource management complexity by having predefined mode-specific configurations rather than making complex real-time decisions
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) may obtain information indicating one of a plurality of network energy modes for communication between a transmission-reception point (TRP) and the UE. The UE may engage in a sidelink positioning session with at least one other UE, comprising the UE transmitting at least one sidelink positioning reference signal (SL-PRS) symbol for the sidelink positioning session based on a SL-PRS transmit power associated with the one of the plurality of network energy modes.