On-Demand Positioning Reference Signal Transmission Coordination
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Solution Overview
Problem
Current wireless networks waste resources by continuously transmitting downlink positioning reference signals (PRS) even when they are not needed, leading to power and signaling resource inefficiencies.
Innovation Solution
Implementing an on-demand PRS transmission system where the increase in PRS transmission is coordinated across multiple transmitters, responsive to location requests and notifications, to allocate resources only when a user equipment (UE) needs to obtain location measurements, using a server or base station to manage and control the transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PRS transmission is continuously performed by network base stations, then positioning measurements can be obtained by mobile devices, but power and signaling resources are wasted when no mobile devices need location measurements
Solution Approach 1:
The patent implements dynamic PRS transmission where base stations adjust their transmission behavior based on real-time positioning requests from mobile devices. When positioning is needed, PRS is transmitted; when not needed, transmission is reduced or stopped. This dynamic adaptation resolves the contradiction between maintaining positioning capability and avoiding resource waste.
Solution Approach 2:
The system changes transmission parameters (whether to transmit PRS or not) based on positioning request status. The base station receives indication information about positioning requests and adjusts its PRS transmission parameters accordingly, transitioning between transmission and non-transmission states to balance positioning availability with resource efficiency.
2Measurement precision
If PRS transmission is increased in response to location requests, then positioning accuracy and responsiveness improve, but interference to or from non-PRS transmission may occur
Solution Approach 1:
The patent implements periodic PRS transmission where base stations transmit PRS only during specific positioning occasions rather than continuously. This periodic approach allows the system to provide positioning measurements when needed while creating gaps where non-PRS transmissions can occur without interference, thus resolving the contradiction between positioning accuracy and interference avoidance.
Solution Approach 2:
The system dynamically adjusts transmission behavior based on positioning request status, increasing PRS transmission when positioning is needed and reducing it when not needed. This dynamic control ensures that PRS transmission occurs only during positioning occasions, preventing interference with non-PRS transmissions while maintaining positioning accuracy when required.
Data Source
AI summary
An entity in a wireless network is configured to increase transmission of a positioning reference signal (PRS) at each of a plurality of transmitters, where the increase in transmission of PRS at each of the plurality of transmitters is coordinated to avoid interference to or from non-PRS transmission in the wireless network. The increase in the transmission of PRS may be performed by a server, such as a location management function (LMF) or location management component (LMC), a base station, such as a gNB, ng-eNB, or eNB, or by a combination of the server and base station. The entity may determine the increase in transmission of the PRS in response to location requests for a plurality of user equipments (UEs), notification reports from a plurality of base stations, or requests for increased PRS from a plurality of UEs.