Base Station Beamforming for Precise UE Positioning Signals
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Solution Overview
Problem
Current mobile communications networks face challenges in accurately determining the position of user equipment due to limitations in signal power and noise interference, particularly when using Positioning Reference Signals (PRS) for Time Difference of Arrival (TDoA) measurements.
Innovation Solution
A base station employs beam forming techniques to direct positioning signals towards user equipment, using coarse position information to enhance signal power and reduce interference, allowing for precise localization through coordinated transmission from multiple base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If omnidirectional positioning signal transmission is used, then coverage area is increased, but signal power in specific direction is reduced
Solution Approach 1:
The patent applies local quality by making the signal transmission directional rather than omnidirectional. The base station transmits positioning signals with enhanced power in specific directions where user equipment is located, rather than distributing power uniformly in all directions. This resolves the contradiction by concentrating signal power locally in needed directions while maintaining adequate coverage area through coordinated transmission from multiple base stations.
2Measurement precision
If beam forming is applied to increase signal power, then positioning precision is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by using coarse position information to determine the direction towards user equipment before transmitting the positioning signal. This pre-determination of direction allows the base station to apply beam forming in advance, concentrating signal power in the correct direction. This resolves the contradiction by performing the complex beam forming operation beforehand based on available position data, thereby achieving high positioning precision without requiring real-time complex processing during signal transmission.
3Reliability
If positioning signal power is increased, then reception quality is improved, but noise interference increases
Solution Approach 1:
The patent applies local quality by directing positioning signals specifically towards user equipment locations rather than transmitting uniformly in all directions. This directional transmission concentrates signal power where needed, improving reception quality at the target device while limiting the spread of signal energy that could create interference. The beam forming technique ensures that high power is applied only in the direction of the user equipment, thereby improving reliability without proportionally increasing noise interference in other directions.
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 increases signal power and reduces noise interference, enabling higher precision in determining user equipment position and supporting a larger number of devices by optimizing signal direction and reception quality.
Implementation Method 1
the base station is configured to transmit a positioning signal to the user equipment and to direct the transmission of the positioning signal towards the user equipment
Data Source
AI summary
A base station is configured to control a wireless communication network cell of a wireless communication network and is configured to use a coarse position information related to a coarse position of a user equipment to determine a direction towards the user equipment. The base station is configured to transmit a positioning signal to the user equipment and to direct the transmission of the positioning signal towards the user equipment. The positioning signal is adapted to allow for a determining of a fine position information relating to the user equipment.