On-Demand PRS Positioning Across 5G Bands for Spectral Efficiency
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Solution Overview
Problem
Existing wireless communication systems, particularly in the context of 5G, face challenges in efficiently managing positioning reference signals (PRS) due to the need for enhanced spectral efficiency, reduced latency, and improved signaling efficiency, which are not adequately addressed by current technologies.
Innovation Solution
A user equipment (UE) is configured to transmit requests for on-demand PRS in a first band, measure these signals, as well as periodic PRS from a second band, and send positioning measurements to a positioning entity, enabling more efficient PRS management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If periodic PRS are transmitted in all bands continuously, then positioning accuracy is maintained, but spectral efficiency deteriorates and signaling overhead increases
Solution Approach 1:
The patent implements periodic PRS transmission only when positioning is actually needed, rather than continuous transmission. The network receives a positioning request from the UE, then activates periodic PRS transmission in the appropriate band, and deactivates it after the positioning measurement is complete. This periodic activation/deactivation pattern maintains positioning accuracy when needed while improving spectral efficiency during normal operation.
Solution Approach 2:
The patent dynamically adjusts PRS transmission based on real-time positioning requirements. The network can switch between different PRS transmission modes (periodic, aperiodic, semi-persistent) depending on the positioning request type, UE capability, and network conditions. This dynamic adaptation allows the system to optimize between positioning accuracy and spectral efficiency based on current operational needs.
2Loss of time
If on-demand PRS requests are processed immediately, then latency is reduced, but device complexity increases
Solution Approach 1:
The patent prepares positioning reference information in advance by maintaining a database of PRS configuration parameters, base station locations, and band information. When a positioning request arrives, the network can quickly retrieve and activate the appropriate pre-configured PRS settings rather than configuring everything from scratch, thereby reducing latency while managing complexity through pre-computation.
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) transmits a request for a first set of base stations to transmit on demand positioning reference signals (PRS) in a first band, measures the on demand PRS from the first set of base stations in the first band, measures periodic PRS from a second set of base stations operating in a second band, and sends, to a positioning entity, positioning measurements of at least the on demand PRS and the periodic PRS.