Low-Latency Location Estimation in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in providing accurate and low-latency location estimation services, particularly in supporting the high-frequency bands used in 5G and emerging 6G technologies, where existing methods struggle to meet the stringent latency and accuracy requirements for location-based services.
Innovation Solution
The proposed solution involves a user equipment (UE) in a wireless communication system that includes a transceiver and a processor configured to receive and transmit LTE positioning protocol (LPP) messages, specifically requesting and providing capabilities for location estimation methods, including support for a response time of 10 milliseconds, to optimize location estimation services by leveraging low-latency measurement and response capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If existing location estimation methods are used in high-frequency bands, then coverage and radio propagation distance are improved through beamforming and massive MIMO, but latency and accuracy requirements for location-based services are not met
Solution Approach 1:
The network entity pre-configures assistance data including location estimation parameters and measurement configurations before the actual location estimation service is requested. This preliminary setup enables the UE to perform measurements and provide location information within the stringent 10ms latency requirement by having all necessary parameters ready in advance, rather than establishing connections and exchanging configuration data in real-time.
2Measurement precision
If conventional location estimation procedures are used, then basic location services are provided, but the stringent latency and accuracy requirements for next-generation wireless communication standards are not satisfied
Solution Approach 1:
The patent introduces a specific response time parameter (10 milliseconds) in the location estimation procedure. The network entity configures the UE with this stringent response time requirement through assistance data, and the UE adjusts its measurement and reporting procedures to meet this parameter. This parameter change drives the entire system to optimize for both high accuracy and low latency simultaneously, rather than using conventional relaxed timing requirements.
3Adaptability or versatility
If comprehensive capability exchange messages are used, then all location estimation capabilities are supported, but message size and processing complexity increase
Solution Approach 1:
The patent extracts only the essential capability information needed for low-latency location estimation from the comprehensive capability exchange messages. Specifically, the UE includes only the response time capability parameter (indicating whether it can meet the 10ms requirement) in its capability message to the network entity, rather than exchanging all possible location estimation capabilities. This extraction reduces message size and processing complexity while maintaining the adaptability to support the required location estimation methods.
Data Source
AI summary
The disclosure provides a method by which a location management function (LMF) and a user equipment (UE) exchange a long-term evolution (LTE) positioning protocol (LPP) message related to location estimation. In particular, the method may include performing, by the LMF, a procedure for exchanging UE capability information related to location estimation with the UE, transmitting assistance information for signal measurement by the UE, and requesting and obtaining a measurement result from the UE.