Idle-Mode UE Positioning With Delegate PRS Scheduling
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently supporting positioning procedures for reduced capacity devices, such as wearable devices and accessory devices, which often lack sufficient power or communication capabilities to perform accurate location estimation.
Innovation Solution
Implementing group-based positioning techniques where a delegate UE performs positioning procedures on behalf of other UEs, and configuring UEs to switch between different PRS configurations based on DRX cycles to conserve power while maintaining positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reduced capacity devices perform individual positioning procedures, then positioning accuracy can be maintained, but power consumption and device complexity increase beyond device capabilities
Solution Approach 1:
Multiple UEs are grouped together for joint positioning procedures. The network entity performs positioning measurements for the entire group rather than individually for each UE, thereby reducing the positioning burden and power consumption for reduced capacity devices while maintaining positioning accuracy through collaborative measurement approaches.
Solution Approach 2:
A delegate UE is introduced as an intermediary within the positioning group. The delegate UE performs positioning measurements and reports on behalf of other UEs in the group, particularly benefiting reduced capacity devices that lack sufficient power or capability to perform accurate location estimation independently.
2Measurement precision
If reduced capacity devices perform individual positioning procedures, then positioning accuracy can be maintained, but device complexity increases beyond device capabilities
Solution Approach 1:
Multiple UEs are grouped together for joint positioning procedures. The network entity performs positioning measurements for the entire group rather than individually for each UE, thereby reducing the positioning burden and power consumption for reduced capacity devices while maintaining positioning accuracy through collaborative measurement approaches.
Solution Approach 2:
A delegate UE is introduced as an intermediary within the positioning group. The delegate UE performs positioning measurements and reports on behalf of other UEs in the group, particularly benefiting reduced capacity devices that lack sufficient power or capability to perform accurate location estimation independently.
3Measurement precision
If UEs continuously monitor PRS for positioning, then positioning accuracy is maintained, but power consumption increases
Solution Approach 1:
The UE implements discontinuous reception (DRX) cycles with periodic wake-up periods. During wake-up periods, the UE monitors for positioning reference signals (PRS) and performs measurements. Between wake-up periods, the UE enters a low-power state. This periodic monitoring approach maintains positioning accuracy while significantly reducing power consumption compared to continuous monitoring.
4Use of energy by moving object
If UEs use longer DRX cycles to conserve power, then power consumption decreases, but positioning accuracy may deteriorate due to reduced measurement opportunities
Solution Approach 1:
Multiple UEs are grouped together for joint positioning procedures. The network entity performs positioning measurements for the entire group rather than individually for each UE, thereby reducing the positioning burden and power consumption for reduced capacity devices while maintaining positioning accuracy through collaborative measurement approaches.
Solution Approach 2:
A delegate UE is introduced as an intermediary within the positioning group. The delegate UE performs positioning measurements and reports on behalf of other UEs in the group, particularly benefiting reduced capacity devices that lack sufficient power or capability to perform accurate location estimation independently.
Data Source
AI summary
Apparatuses, systems, and methods for positioning procedures for reduced capacity devices, e.g., in 5G NR systems and beyond. A UE may receive, from an LMF, a positioning configuration while operating in an RRC idle/inactive mode. The positioning configuration may be an RRC idle mode positioning configuration. The positioning configuration may specify a schedule and/or periodicity for a paging occasion and one or more additional paging occasions. The UE may be configured to attend the paging occasion, e.g., based on the positioning configuration, and receive, from a base station, one or more PRSs according to the positioning configuration. e.g., in the paging occasion.