RSTD Measurement Compensation Using Pre-Deployed Aid Devices
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Solution Overview
Problem
In LTE networks, base station positioning using OTDOA technology is hindered by multipath interference, leading to significant deviations in RSTD measurements and reduced precision, and existing compensation methods require mobile terminals to report GPS information, wasting resources and failing in weak signal conditions.
Innovation Solution
A measurement compensation method and system that employs a positioning aid device pre-deployed in fixed positions to acquire RSTD measurement compensation values, allowing the positioning server to compensate RSTD measurements without requiring additional GPS information from mobile terminals, thereby improving positioning precision without increasing resource overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS-based compensation method is used to improve positioning precision, then positioning precision is improved, but mobile terminal resource overhead increases and GPS signal reception becomes critical
Solution Approach 1:
The patent introduces positioning aid devices as intermediary elements that are pre-deployed in the network infrastructure. These aid devices perform RSTD measurements and generate compensation values, acting as mediators between the base stations and mobile terminals. The mobile terminal no longer needs to perform GPS-based compensation itself, but instead receives pre-computed compensation values from the positioning aid devices, thus reducing terminal resource consumption while maintaining positioning precision.
Solution Approach 2:
The positioning aid devices perform RSTD measurements and compute compensation values in advance, before the mobile terminal needs positioning services. The compensation values are pre-calculated and stored in the network, so when a mobile terminal requires positioning, it can directly obtain the pre-computed compensation values without performing energy-consuming GPS measurements and calculations at the terminal side.
2Measurement precision
If GPS-based compensation is implemented to reduce measurement deviation, then positioning accuracy improves, but the method fails when GPS signal is too weak
Solution Approach 1:
The positioning aid devices serve as reliable intermediaries that perform RSTD measurements in fixed, pre-deployed locations with optimal signal conditions. Since these aid devices are stationary and strategically positioned, they consistently receive strong signals from base stations and can reliably compute compensation values even when mobile terminals in movement experience weak GPS signals. This transfers the measurement burden from mobile terminals to fixed infrastructure elements.
Solution Approach 2:
The network infrastructure itself provides the compensation service through positioning aid devices, making the system self-sufficient. Instead of relying on mobile terminals to perform GPS-based compensation (which fails in weak signal conditions), the network autonomously performs measurements and generates compensation values through its own deployed aid devices, ensuring continuous reliable operation regardless of terminal signal conditions.
3Measurement precision
If mobile terminal performs real-time GPS measurement and reporting to achieve compensation, then positioning precision is maintained, but terminal complexity and resource consumption increase
Solution Approach 1:
The positioning aid devices act as intermediaries that handle the complex measurement and compensation calculation tasks. Instead of requiring mobile terminals to perform GPS measurements, calculate compensation values, and manage the entire compensation process, the aid devices perform these functions centrally. The mobile terminal's role is simplified to receiving pre-computed compensation values and applying them to its RSTD measurements, significantly reducing terminal complexity.
Solution Approach 2:
The network infrastructure provides self-service by autonomously performing all measurement and compensation tasks through positioning aid devices. Mobile terminals no longer need to actively engage in GPS-based compensation procedures; they simply receive the compensation values that the network has already computed and applied. This transfers the operational burden from the terminal to the network, reducing terminal complexity while maintaining precision.
Data Source
AI summary
Embodiments of the present invention disclose a measurement compensation method, apparatus, server, and system in base station positioning. The method includes: receiving a reference signal time difference RSTD measurement value between different base stations that is reported by a mobile terminal; acquiring an RSTD measurement compensation value corresponding to a positioning aid device, where the positioning aid device is pre-deployed in a fixed position, the mobile terminal is positioned in a range corresponding to the fixed position, and the RSTD measurement compensation value is used to compensate RSTD measurement within the range; and compensating the RSTD measurement value according to the RSTD measurement compensation value to obtain an RSTD compensation result. By adopting the present invention, the RSTD measurement value reported by the mobile terminal can be compensated, so as to improve the positioning precision of the mobile terminal.