Vehicle Wireless Interface Channel Quality Using User Data Signals
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Solution Overview
Problem
Vehicles face difficulties in maintaining adequate radio signal strength for wireless communication when parked in underground garages due to signal attenuation by obstacles, and existing methods like beamforming require additional pilot or control signals.
Innovation Solution
A method for determining channel quality using user data signals in the application layer, allowing for improved wireless connection by emitting user data signals at multiple predetermined solid angles and adapting the radiation characteristic of the communication interface without relying on physical layer signals, enabling beamforming and optimizing antenna usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beamforming is used to improve radiation characteristic, then directional signal transmission is improved, but additional pilot or control signals are required
Solution Approach 1:
The patent combines channel quality determination with normal user data transmission by embedding feedback information in the downlink user data signals. This merges the channel quality measurement function with the existing data communication function, eliminating the need for separate pilot signals while maintaining beamforming capability.
Solution Approach 2:
The downlink user data signals serve multiple functions: they carry user data information and simultaneously provide channel quality feedback for uplink transmission optimization. This multi-functionality eliminates the need for dedicated pilot signals, reducing system complexity while maintaining reliable wireless connections.
2Measurement precision
If channel quality is determined using physical layer signals, then measurement accuracy is improved, but independence from physical layer methods is reduced
Solution Approach 1:
The patent uses downlink user data signals as an intermediary to carry channel quality feedback information. These signals serve as a mediator between the physical layer transmission and the application layer channel quality assessment, enabling independent channel quality determination without relying on physical layer pilot signals.
Solution Approach 2:
Instead of using physical layer signals to determine channel quality, the patent inverts the approach by using application layer user data signals for channel quality assessment. This inversion enables channel quality determination independent of physical layer methods while maintaining measurement accuracy.
3Reliability
If user data signals are emitted at multiple solid angles, then optimal radiation direction is improved, but signal transmission complexity increases
Solution Approach 1:
The patent employs periodic sweeping of the radiation characteristic in different directions by rotating the communication interface. This periodic action allows the system to identify optimal radiation directions without requiring simultaneous transmission at multiple angles, reducing transmission complexity while maintaining optimal signal direction.
Solution Approach 2:
The communication interface dynamically adjusts its radiation characteristic by rotating to different orientations. This dynamic adaptation allows the system to find and maintain optimal radiation directions based on real-time channel conditions, achieving reliable directional transmission without fixed multi-angle complexity.
Data Source
AI summary
The invention relates to a method for operating a wireless communication interface arranged in a vehicle, in particular a motor vehicle, an apparatus for operating a wireless communication interface and a vehicle, in particular a motor vehicle, having an apparatus for operating a wireless communication interface and a control device. According to the invention, at least one uplink user data signal is taken as a basis for determining a channel quality indicator for the user data signal, so that channel quality determination is performable in the application layer independently of determination methods for the channel quality based on pilot, control or protocol signals.