NR-Light UE Positioning With Proximate UE Timing Exchange
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Solution Overview
Problem
Bandwidth-limited user equipment (UE) such as NR-Light devices face reduced positioning accuracy and limited coverage due to reduced bandwidth and transmit power, necessitating improved positioning techniques.
Innovation Solution
Utilizing sidelink connections with proximate UEs, such as smartphones, to exchange timing measurement signals and leverage their greater bandwidth for enhanced positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If bandwidth-limited UE uses reduced bandwidth for positioning, then device complexity and power consumption are reduced, but positioning accuracy deteriorates
Solution Approach 1:
A proximate UE with higher bandwidth capability acts as an intermediary to enhance positioning accuracy for bandwidth-limited UEs. The proximate UE receives timing measurement signals from the bandwidth-limited UE, performs measurements using its superior bandwidth capability, and returns the results, thereby compensating for the limited bandwidth of the original UE without requiring the bandwidth-limited UE to increase its own bandwidth capability
Solution Approach 2:
The positioning measurement function is copied from the bandwidth-limited UE to a proximate UE with higher capabilities. Instead of requiring the bandwidth-limited UE to perform high-precision measurements itself, the measurement task is transferred to the proximate UE which then provides positioning measurements on behalf of the bandwidth-limited UE, achieving accurate positioning without increasing the bandwidth requirements of the bandwidth-limited device
2Use of energy by moving object
If bandwidth-limited UE transmits positioning signals with reduced power, then energy consumption is reduced, but signal coverage and detection reliability deteriorate
Solution Approach 1:
The proximate UE serves as an intermediary that receives and processes positioning signals from the bandwidth-limited UE. By having the proximate UE with higher sensitivity and processing capability perform the signal detection, the system can use lower transmit power from the bandwidth-limited UE while maintaining reliable signal detection through the more capable proximate UE
3Device complexity
If bandwidth-limited UE operates with reduced bandwidth, then device cost and complexity are reduced, but positioning coverage area is limited
Solution Approach 1:
The proximate UE with higher bandwidth capability extends the effective positioning coverage area for bandwidth-limited UEs. By leveraging the proximate UE's superior capabilities, the system can achieve accurate positioning over a larger geographic area without requiring the bandwidth-limited UE itself to have high bandwidth capability, thus maintaining low device complexity while expanding service coverage
Data Source
AI summary
Techniques for positioning a bandwidth-limited user equipment (UE) are provided. An example method of positioning performed by a bandwidth-limited UE according to the disclosure includes receiving a first timing measurement signal from at least one proximate UE, wherein the at least one proximate UE is capable of using more bandwidth than the bandwidth-limited UE, and transmitting a second timing measurement signal to the at least one proximate user equipment.