IR-UWB Ranging via LTE LPP for Low-Latency Precise Positioning
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Solution Overview
Problem
Existing wireless communication systems, particularly in the context of 5G, face challenges in achieving high spectral efficiency, supporting large sensor deployments, and reducing latency, especially in positioning technologies.
Innovation Solution
Implementing an impulse radio ultra-wideband (IR-UWB) ranging procedure using Long-Term Evolution (LTE) positioning protocol (LPP) capabilities and assistance data messages to facilitate precise ranging between user equipment (UE) and network nodes, enabling enhanced positioning accuracy and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing wireless communication systems are used for positioning, then basic connectivity is maintained, but positioning accuracy and efficiency are insufficient for 5G requirements
Solution Approach 1:
The patent combines LTE positioning protocol (LPP) capabilities with impulse radio ultra-wideband (IR-UWB) ranging procedures to create a hybrid positioning system. This merging allows the system to leverage both the widespread LTE infrastructure for initial positioning and the high-precision UWB technology for accurate ranging, thereby achieving both high positioning accuracy and efficiency required for 5G applications
Solution Approach 2:
The patent enables user equipment to perform multiple functions: it can operate with basic LTE connectivity for general communication and simultaneously execute IR-UWB ranging procedures for precise positioning. The system supports both traditional cellular positioning methods and advanced UWB-based time-of-flight measurements, making it universally applicable across different 5G use cases
2Productivity
If 5G spectral efficiency is enhanced to support high data transfer speeds, then data rates improve, but system complexity increases
Solution Approach 1:
The patent segments the positioning functionality into distinct modules: LPP capability indication, assistance data reception, and IR-UWB ranging execution. This segmentation allows each component to be optimized independently - the LPP layer handles protocol management while the UWB layer handles precise timing measurements, reducing overall system complexity despite high data transfer requirements
3Loss of time
If latency is reduced to meet 5G requirements, then response time improves, but positioning precision requirements become more stringent
Solution Approach 1:
The patent implements preliminary action by having the network entity pre-provide assistance data to the user equipment before the actual positioning measurement is needed. This assistance data includes information about available UWB network nodes and their characteristics, allowing the UE to immediately execute ranging procedures when positioning is required, thereby reducing latency while maintaining precision
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) transmits, to a network entity, a Long-Term Evolution (LTE) positioning protocol (LPP) capabilities message, the LPP capabilities message including one or more capability parameters indicating capabilities of the UE to engage in a positioning session with at least one network node, the positioning session comprising an impulse radio ultra-wideband (IR-UWB) ranging procedure between the UE and the at least one network node, receives, from the network entity, an LPP assistance data message, the LPP assistance data message including one or more assistance parameters configuring the UE to perform at least the IR-UWB ranging procedure, and performs at least the IR-UWB ranging procedure based at least on the one or more assistance parameters.