NR UTDOA Positioning via Beam-Configured Uplink Reference Signals
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Solution Overview
Problem
The existing UTDOA positioning method in LTE systems is not applicable in NR systems due to beamforming, which results in some LMUs being unable to receive positioning signals from terminals, thereby preventing accurate terminal positioning.
Innovation Solution
A method is introduced where a network device generates and sends first configuration information to a terminal, including a mapping relationship between an uplink reference signal resource and information about a downlink reference signal of an LMU, allowing the terminal to send positioning signals on configured resources, ensuring that corresponding LMUs can receive these signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beamforming is used in NR systems to resist fading, then signal transmission quality is improved, but some LMUs cannot receive positioning signals from terminals, causing positioning failure
Solution Approach 1:
The network device performs preliminary actions by determining the beam direction for transmitting uplink reference signals and configuring the terminal to send positioning signals in specific beam directions. This preliminary configuration ensures that positioning signals are directed toward LMUs that can receive them, preventing the positioning failure that would otherwise occur due to beamforming's directional nature.
Solution Approach 2:
The network device obtains information about downlink reference signals of LMUs and uses this feedback to determine appropriate beam directions for uplink positioning signals. This feedback mechanism allows the system to adapt the beamforming configuration based on actual LMU reception capabilities, ensuring that positioning signals are transmitted in directions where they can be successfully received.
2Adaptability or versatility
If omnidirectional positioning signals are sent in LTE systems, then all nearby LMUs can receive signals, but this approach cannot be applied in NR systems with beamforming
Solution Approach 1:
Instead of using omnidirectional signal transmission, the patent applies local quality by configuring the terminal to send positioning signals in specific beam directions toward particular LMUs. Each beam is tailored to reach specific receiving points, providing targeted coverage that adapts to the beamforming architecture of NR systems while maintaining effective positioning signal reception.
3Reliability
If beamforming is applied to transmit positioning signals in NR systems, then signal quality is improved, but the existing UTDOA positioning method becomes inapplicable
Solution Approach 1:
The patent introduces dynamics by making the positioning signal transmission adaptive to beamforming conditions. The network device dynamically determines beam directions based on downlink reference signal information and configures the terminal accordingly. This dynamic adaptation allows the UTDOA positioning method to function in NR systems with beamforming by continuously adjusting signal directions to match actual propagation conditions and LMU locations.
Data Source
AI summary
Embodiments of this application provide an information processing method, a communications device, a system, and a storage medium. The method includes: generating, by a network device, first configuration information of an uplink reference signal, where the first configuration information includes a first mapping relationship between an uplink reference signal resource and first information, the first information is information about a downlink reference signal of a location measurement unit LMU, and the LMU is an LMU other than a serving base station; and sending, by the network device, the first configuration information to a terminal. The terminal can send a positioning signal on a configured uplink reference signal resource as indicated by the first configuration information, so that the LMU corresponding to the first information corresponding to the uplink reference signal resource can receive the positioning signal, thereby implementing UTDOA positioning in an NR system.