UE RRC State Management for Positioning Latency and Power
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing radio resource control (RRC) states during positioning sessions, particularly in balancing power consumption and latency requirements for user equipment (UE) in 5G networks, which affects the accuracy and efficiency of positioning operations.
Innovation Solution
A method is introduced where a location server recommends and configures a UE to transition to or remain in a specific RRC state (either idle, inactive, or connected) based on the power and latency modes required for a positioning session, optimizing RRC state transitions to meet the session's power consumption and latency needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the UE transitions to RRC idle state to save power, then power consumption is reduced, but positioning latency increases
Solution Approach 1:
The patent implements dynamic RRC state management where the UE transitions between connected, inactive, and idle states based on real-time positioning requirements. The location server recommends appropriate RRC states for each positioning session, allowing the system to adapt between power-saving idle mode and low-latency connected mode as needed, thus resolving the contradiction between power consumption and positioning latency
2Measurement precision
If the UE remains in RRC connected state for accurate positioning, then positioning accuracy is improved, but power consumption increases
Solution Approach 1:
The patent changes the RRC state parameter dynamically based on positioning session requirements. The location server evaluates positioning accuracy needs and recommends appropriate RRC states (connected, inactive, or idle), allowing the system to achieve accurate positioning when necessary while conserving power during normal operations, thus resolving the contradiction between positioning accuracy and power consumption
3Use of energy by moving object
If the UE frequently transitions between RRC states, then power efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent introduces the location server as an intermediary that manages RRC state recommendations between the UE and the gNB. This centralized management reduces unnecessary state transitions and optimizes signaling by having the location server make informed recommendations based on positioning session requirements, thus resolving the contradiction between power efficiency and signaling overhead
Data Source
AI summary
Disclosed are techniques for wireless positioning. In an aspect, a user equipment (UE) engages in a positioning procedure with a location server, transmits a recommendation to a network entity to transition to or remain in a first radio resource control (RRC) state for the positioning procedure, receives, in response to the recommendation, a configuration from the network entity to transition to or remain in the first RRC state, transitions to or remains in the first RRC state to perform the positioning procedure based on the configuration, and performs one or more positioning operations associated with the positioning procedure while in the first RRC state.