5G Positioning via Highest Sub-Carrier Spacing
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Solution Overview
Problem
Existing methods for determining the position of user equipment (UE) in cellular networks, such as those using 4G LTE and 5G NR, face challenges in efficiency and accuracy when relying on timing advance values.
Innovation Solution
The method involves determining the position of the UE by utilizing radio carriers or bandwidth parts with the highest sub-carrier spacing, which are associated with the smallest timing advance values, thereby improving the accuracy of the positioning session.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If timing advance values are used for position determination in cellular networks, then the position can be determined using existing cellular infrastructure, but the accuracy is limited by the resolution of timing advance values associated with different radio carriers and bandwidth parts
Solution Approach 1:
The patent applies parameter changes by switching between different radio carriers or bandwidth parts with different sub-carrier spacings to optimize timing advance value resolution. The system changes the operational parameters (sub-carrier spacing) to achieve higher measurement precision for position determination when needed.
Solution Approach 2:
The patent implements dynamics by enabling the user equipment to dynamically switch between different radio carriers or bandwidth parts based on the positioning accuracy requirements. The system adapts the timing advance measurement resolution dynamically by selecting appropriate carriers with higher sub-carrier spacings when enhanced accuracy is needed.
2Measurement precision
If radio carriers with higher sub-carrier spacing are used to improve timing advance resolution, then position determination accuracy improves, but the complexity of managing multiple radio carriers and bandwidth parts increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple radio carriers and bandwidth parts with different sub-carrier spacings before positioning operations. The network and user equipment prepare the necessary carriers in advance, so when high-precision positioning is needed, the appropriate high-resolution carrier is already available for immediate use.
Solution Approach 2:
The patent implements universality by designing the system to support multiple radio carriers and bandwidth parts that can serve both general communication functions and enhanced positioning functions. The same infrastructure is used for both data communication and high-precision positioning, with the ability to switch between different carriers based on the required function.
Data Source
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AI summary
The location of a user equipment may be determined by having the user equipment use a radio carrier and/or a bandwidth part having the highest sub-carrier spacing available to the user equipment. A user equipment may communicate through a plurality of radio carriers, determine a first radio carrier or bandwidth part having a highest sub-carrier spacing, determine a timing advance value associated with the first radio carrier or bandwidth part, and transmit to a location server, the timing advance value.