Wireless Base Station Location Determination in Repeater Chains
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Solution Overview
Problem
Current UE location techniques using Round Trip Delay (RTD) in wireless repeater chains are inaccurate due to internal processing delays, affecting the delivery of emergency services and other tasks.
Innovation Solution
A wireless base station determines the fine distance to UE by maintaining a data structure that accounts for geographic locations and internal processing delays of repeaters in the repeater chain, calculating the number of repeater hops and adjusting RTD measurements to remove internal processing delays, thereby refining the distance calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RTD measurement is used to determine UE location in wireless repeater chains, then location capability is provided, but location accuracy deteriorates due to internal processing delays in repeaters
Solution Approach 1:
The system performs preliminary actions by pre-establishing a data structure that stores geographic locations and processing delay characteristics of repeaters before location measurement. This preliminary data preparation enables accurate location calculation by compensating for internal processing delays without requiring real-time complex measurements.
Solution Approach 2:
The patent introduces an intermediary approach by using a data structure as a mediator between the RTD measurement system and the actual location calculation. This data structure acts as a mediator that stores pre-characterized repeater information (geographic locations, processing delays), allowing the system to calculate accurate UE locations by referencing this intermediary data rather than performing complex real-time calculations.
2Area of stationary object
If wireless repeaters are used to extend wireless footprint, then service coverage is improved, but location determination accuracy deteriorates
Solution Approach 1:
The system performs preliminary actions by pre-establishing a data structure that stores geographic locations and processing delay characteristics of repeaters before location measurement. This preliminary data preparation enables accurate location calculation by compensating for internal processing delays without requiring real-time complex measurements.
Solution Approach 2:
The patent applies parameter changes by modifying the RTD measurement parameters to account for repeater processing delays. Instead of using raw RTD values directly, the system adjusts the measurement parameters by incorporating repeater chain information (number of hops, processing delays) into the distance calculation, thereby maintaining accuracy despite extended coverage area.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the accuracy of UE location in wireless repeater chains, improving the reliability of emergency services and other data communication tasks.
Implementation Method 1
Part of this location process includes the determination of a distance from the wireless base station to the UE. Typically, a fine distance is determined by performing a Round Trip Delay (RTD) test and multiplying half of the RTD by the speed of light (RTD/2*C).
Data Source
AI summary
A wireless base station locates User Equipment (UE) that is served by a wireless repeater chain that is served by the wireless base station. The wireless base station maintains a data structure that indicates geographic locations for wireless repeaters in the wireless repeater chain. The wireless base station wirelessly exchanges user data with the wireless repeater chain responsive to the UE exchanging the user data with one of the wireless repeaters in the wireless repeater chain. The wireless base station determines repeater hops in the wireless repeater chain between the wireless base station and the UE. The wireless base station determines the wireless repeater serving the UE based on the repeater hops. The wireless base station indicates a geographic location in the data structure for the wireless repeater serving the UE.