Positioning Reference Signal Assistance Data for 5G Accuracy
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Solution Overview
Problem
Existing 5G communication systems face challenges in accurately implementing terminal positioning for IoT networks, particularly in estimating location using uplink and downlink reference signals, which is crucial for machine-type communications and sensor networks.
Innovation Solution
A method and apparatus for receiving System Information (SIB1), acquiring SI, transmitting RequestAssistanceData, and receiving ProvideAssistanceData, including a physical cell identity and second identifier, to facilitate precise positioning in 5G systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If positioning is implemented using uplink and downlink reference signals in 5G systems, then terminal positioning capability is enabled for IoT networks, but positioning accuracy and efficiency are insufficient without proper assistance data
Solution Approach 1:
The patent applies preliminary action by having the network pre-configure positioning reference signal resources and assistance data before positioning measurements are performed. The LMF configures PRS resources, occasions, and measurement parameters in advance, allowing the UE to perform accurate positioning measurements without needing to request all necessary information at the moment of measurement, thus improving positioning accuracy while reducing information loss.
2Adaptability or versatility
If positioning reference signal resources are configured for all possible positioning scenarios, then positioning versatility is improved, but system complexity and resource overhead increase
Solution Approach 1:
The patent applies dynamics by making PRS resource configuration flexible and adaptable to different positioning scenarios. The LMF can dynamically configure PRS resources, occasions, and measurement parameters based on specific positioning requirements, UE capabilities, and network conditions. This allows the system to maintain versatility for different positioning methods (OTDOA, DL-TDOA, etc.) while avoiding the complexity of pre-configuring all possible scenarios statically.
Solution Approach 2:
The patent applies parameter changes by allowing the LMF to adjust PRS configuration parameters such as resource density, occasion periodicity, frequency location, and measurement bandwidth based on positioning accuracy requirements and network conditions. This enables the system to achieve versatile positioning capability by changing parameters rather than maintaining complex fixed configurations for all scenarios.
3Measurement precision
If detailed positioning measurement configurations are provided to all UEs, then positioning precision is improved, but signaling overhead and processing burden increase
Solution Approach 1:
The patent applies local quality by providing detailed positioning measurement configurations selectively to UEs that require high positioning precision, rather than to all UEs uniformly. The LMF can determine which UEs need enhanced positioning capabilities and provide them with specific PRS measurement configurations, measurement bandwidth, and reporting requirements tailored to their local positioning needs, thereby reducing overall signaling overhead while maintaining precision where required.
Data Source
AI summary
A method and apparatus for positioning in a mobile communication system are provided. Method for positioning includes receiving a System Information Block1 (SIB1), acquiring a System Information (SI), transmitting a RequestAssistanceData and receiving a ProvideAssistanceData. The SI includes a second PRS data. The RequestAssistanceData includes a physical cell identity of PCell and the second identifier.