Positioning Assistance Data Update for RRC Inactive UEs
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Solution Overview
Problem
In wireless communication systems, particularly in 5G networks, user equipment (UE) operating in radio resource control (RRC) inactive or idle states face challenges in obtaining updated positioning assistance data when moving between coverage areas, leading to inefficiencies in positioning procedures due to outdated or irrelevant data.
Innovation Solution
A method where network entities receive event reports from UE in RRC inactive or idle states, determine the need for updated positioning assistance data, and transmit this data to the appropriate base stations, enabling them to provide the UE with the necessary updates for accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If UE operates in RRC inactive or idle state to save resources, then energy consumption is reduced and network load is decreased, but positioning accuracy deteriorates due to inability to receive updated positioning assistance data
Solution Approach 1:
The network performs preliminary actions by proactively determining when positioning assistance data needs to be updated before the UE actually needs it. The network entity monitors UE location information and coverage area changes, and preemptively triggers data update procedures through base stations, ensuring accurate positioning data is ready when the UE resumes active state or when needed for positioning operations.
2Measurement precision
If positioning assistance data is updated frequently to maintain accuracy, then positioning precision is improved, but network signaling overhead increases and data transmission time is consumed
Solution Approach 1:
The system dynamically adjusts the positioning assistance data update mechanism based on real-time conditions. The network entity determines whether an update is needed by evaluating current location information, coverage area changes, and data validity criteria. This dynamic approach ensures data is updated only when necessary, avoiding unnecessary transmissions while maintaining positioning accuracy.
Solution Approach 2:
The system changes parameters such as data validity criteria and update triggers based on UE location and network conditions. By modifying these parameters dynamically, the system optimizes the balance between maintaining accurate positioning data and minimizing unnecessary data transmission overhead.
3Loss of energy
If positioning assistance data is updated only when UE moves to new coverage area, then network resources are conserved, but positioning reliability deteriorates due to potential data invalidity in new locations
Solution Approach 1:
The network entity uses feedback mechanisms by monitoring UE location information and coverage area changes to determine when data updates are necessary. This feedback loop ensures that positioning assistance data is updated in response to actual UE movement and network conditions, maintaining reliability while avoiding unnecessary updates.
Solution Approach 2:
The network performs preliminary determination of update needs before actually updating data. By evaluating location information and coverage changes in advance, the network can proactively trigger updates only when necessary, ensuring reliability is maintained without wasting network resources on unnecessary transmissions.
Data Source
AI summary
Disclosed are techniques for positioning. In an aspect, a network entity receives, from a first base station of a user equipment (UE) operating in a radio resource control (RRC) inactive state, an event report message indicating that the UE has received a request to perform a positioning procedure, and transmits, based on a determination that the UE would benefit from updated positioning assistance data for the positioning procedure, the updated positioning assistance data to a second base station of the UE to enable the second base station to send the updated positioning assistance data to the UE.