SL-PRS Power Control Across Network Energy Modes for Sidelink Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems, particularly in the context of 5G, face challenges in efficiently managing sidelink positioning reference signals (SL-PRS) to balance positioning accuracy with network energy efficiency, especially in scenarios involving vehicle-to-everything (V2X) communications.
Innovation Solution
The method involves user equipment (UE) operating in different network energy modes, adjusting sidelink positioning reference signal (SL-PRS) transmit power and bandwidth allocation based on network energy modes, and applying power-saving modifications to optimize SL-PRS resource allocation across slots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If SL-PRS transmit power is increased to improve positioning accuracy, then positioning precision is improved, but network energy consumption increases
Solution Approach 1:
The patent implements dynamic SL-PRS transmit power adjustment based on network energy modes. The UE receives energy mode information from the TRP and adapts its SL-PRS transmit power accordingly, transitioning from static to dynamic power control. This resolves the contradiction by making power consumption adaptive rather than fixed, allowing high power only when positioning accuracy is critical.
Solution Approach 2:
The patent changes the transmit power parameter of SL-PRS based on network energy modes. Different energy modes correspond to different power levels, enabling the system to switch between power-saving and high-accuracy modes. This directly addresses the contradiction by providing a mechanism to adjust the power parameter dynamically based on network conditions.
2Measurement precision
If SL-PRS transmission is performed frequently to maintain positioning accuracy, then positioning precision is improved, but network energy efficiency deteriorates
Solution Approach 1:
The patent implements periodic SL-PRS transmission based on network energy modes. Instead of continuous transmission, the UE transmits SL-PRS periodically with timing adjusted according to the energy mode. This resolves the contradiction by replacing continuous energy-consuming transmissions with periodic ones, maintaining positioning functionality while reducing overall energy loss.
Solution Approach 2:
The patent applies partial action by transmitting SL-PRS only when necessary based on energy mode conditions. Rather than always transmitting at full capability, the system uses just enough transmission resources to maintain acceptable positioning accuracy, reducing energy waste from excessive transmissions.
3Loss of energy
If network energy saving modes are applied to reduce power consumption, then energy efficiency is improved, but positioning capability may be degraded
Solution Approach 1:
The patent implements feedback mechanisms where the UE receives energy mode information from the TRP and adjusts SL-PRS transmission accordingly. The TRP can indicate which energy mode to use, creating a feedback loop that ensures positioning capability is maintained within acceptable bounds while improving energy efficiency. This resolves the contradiction by using feedback to prevent positioning degradation.
Solution Approach 2:
The patent enables the UE to autonomously adjust its SL-PRS transmission based on received energy mode indications. The UE self-manages its power consumption by switching between different transmission configurations according to the energy mode, without requiring continuous network intervention. This maintains positioning capability while achieving energy savings through autonomous adaptation.
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.