Dynamic Power Mode Selection for UE Positioning
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Solution Overview
Problem
Current wireless communication systems, particularly in the context of 5G, face challenges in efficiently managing power modes for user equipment (UE) when measuring positioning reference signals (PRSs), leading to suboptimal power consumption and performance in scenarios like vehicle-to-everything (V2X) communications.
Innovation Solution
A method and system that allow user equipment (UE) to dynamically change its power mode between a power saving mode and a normal mode for measuring PRSs from one or multiple transmission/reception points, as requested and configured by a location server, optimizing power usage and performance based on specific communication needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE measures PRSs from multiple TRPs in normal power mode, then positioning accuracy and communication performance are improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic power mode switching that allows the UE to transition between power saving mode and normal power mode based on communication conditions. The location server configures different PRS measurement scenarios corresponding to different power modes, enabling the system to adaptively adjust measurement behavior (measuring from 1 TRP in power saving mode vs. multiple TRPs in normal mode) to match current communication needs, thus resolving the contradiction between positioning accuracy and power consumption
Solution Approach 2:
The patent changes the parameter of TRP measurement quantity based on power mode state. In power saving mode, the UE measures PRSs from one TRP, while in normal power mode, the UE measures PRSs from multiple TRPs. This parameter change is controlled by power mode indication information and location server configuration, allowing the system to optimize the balance between measurement precision and energy consumption by adjusting the number of measured TRPs
2Use of energy by moving object
If the UE switches between power modes dynamically, then power efficiency is optimized, but system complexity increases
Solution Approach 1:
The patent introduces a location server as an intermediary that manages the power mode switching process. The location server receives power mode change requests from the UE, determines the appropriate power mode based on communication conditions, and configures corresponding PRS measurement scenarios. This intermediary approach simplifies the overall system architecture by centralizing the decision-making logic, avoiding the need for complex distributed algorithms while still achieving optimized power efficiency
Solution Approach 2:
The patent implements a feedback mechanism where the UE sends power mode change requests to the location server based on its power consumption status and communication needs. The location server processes these requests and provides configuration feedback, creating a closed-loop control system that dynamically adjusts power modes. This feedback-driven approach enables adaptive power optimization without requiring complex predictive models or centralized control
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) may determine to change a power mode of the UE to a new power mode. The UE may change the power mode of the UE to the new power mode, wherein if the new power mode comprises a power saving mode, the UE measures positioning reference signals (PRSs) from one transmission/reception point (TRP), and wherein if the new power mode is a normal power mode, the UE measures PRSs from two or more TRPs.