OTDOA Positioning Precision in Multi-Mode Terminals
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Solution Overview
Problem
OTDOA positioning in wireless communications is affected by interference signals from coexistence of LTE and ISM frequency bands, leading to increased positioning errors due to IDC interference, WiFi, and Bluetooth signals.
Innovation Solution
A method that acquires coexistence interference information to designate suitable positioning signal resources for terminals, reducing interference impact by instructing them to perform measurements using appropriate frequency, time, or code domain resources, and calculating terminal location based on time differences of arrivals from positioning base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multi-mode terminal supports both LTE and ISM frequency bands, then terminal functionality is improved, but interference signals affect positioning precision
Solution Approach 1:
The patent segments the positioning signal resources into different domains (frequency domain, time domain, code domain) to allow selective measurement. The terminal is instructed to perform measurements only on resources that are not affected by interference from coexisting communication signals, thus maintaining positioning precision while supporting multi-mode functionality.
Solution Approach 2:
The patent applies local quality by designating specific positioning signal resources with different characteristics (frequency, time, code) for measurement. The network side configures measurement resources locally optimized for each terminal's interference situation, allowing the terminal to measure positioning signals in resource domains where interference is minimized.
2Reliability
If terminal performs positioning measurement in presence of interference signals, then positioning service is maintained, but positioning error increases
Solution Approach 1:
The patent implements preliminary action by having the network side pre-configure positioning signal measurement resources before the terminal performs measurement. The network side determines which frequency, time, and code domain resources are suitable for measurement based on expected interference conditions, and instructs the terminal in advance to measure only on these pre-selected resources.
Solution Approach 2:
The patent introduces an intermediary mechanism where the network side (eNodeB) acts as a mediator between the positioning signals and the terminal. The network side configures and controls the positioning signal measurement resources, filtering out interference-affected resources before the terminal performs measurement, thus protecting the measurement process from interference.
3Ease of manufacture
If positioning signal resources are designated without considering interference, then resource allocation is simple, but measurement accuracy deteriorates
Solution Approach 1:
The patent implements dynamic resource allocation where the positioning signal measurement resources are not fixed but are configured based on terminal-specific interference conditions. The network side dynamically determines and updates the measurement resources for each terminal according to its coexistence interference situation, allowing the system to adapt to changing interference conditions while maintaining manageable complexity through standardized configuration procedures.
Data Source
AI summary
Embodiments of the present invention provide a positioning processing method, apparatus, and system. The method includes: acquiring coexistence interference information of a terminal; instructing, according to the coexistence interference information, the terminal to perform measurement on a suitable positioning signal resource; and positioning the terminal based on a positioning measurement result reported by the terminal. According to the positioning processing method, apparatus, and system provided in the embodiments of the present invention, precision of terminal positioning can be improved.