Aircraft Wireless Transmission System Altitude Frequency Selection
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Solution Overview
Problem
Current wireless transmission systems in aircraft lack sufficient bandwidth to support high-demand services like video-on-demand without interfering with terrestrial wireless phone systems, and existing solutions do not efficiently utilize frequency bands, leading to costly and time-consuming seating configuration changes.
Innovation Solution
A wireless transmission system that dynamically selects frequency bands based on aircraft altitude to optimize bandwidth usage, allowing for efficient data transmission to each seat without interfering with ground communication systems, thereby enabling flexible seating configurations and advanced in-flight services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated wireless frequency band is assigned to in-flight telephone systems, then telephone communication reliability is improved, but bandwidth efficiency deteriorates
Solution Approach 1:
The patent merges the in-flight telephone system with the existing terrestrial wireless communication system by allowing both to share the same frequency band. The access point selectively transmits signals based on altitude, combining multiple functions into a single system resource allocation.
Solution Approach 2:
The system dynamically adjusts its operation based on aircraft altitude. At low altitudes, the access point restricts transmission to prevent interference with terrestrial phone systems. At high altitudes, it allows full wireless communication for in-flight entertainment services, making the system adaptive to changing operational conditions.
2Reliability
If relay cables are wired through side walls to connect floor-mounted seats, then connection reliability is improved, but installation time and cost increase
Solution Approach 1:
The patent replaces the mechanical wired cable system with a wireless transmission system using radio frequency signals. This eliminates the need for physical relay cables running through side walls, allowing flexible seat configuration changes without rewiring.
Solution Approach 2:
The wireless access point serves multiple functions: providing in-flight entertainment services, enabling telephone communications, and supporting various seating configurations. This multi-functional system eliminates the need for dedicated wiring for each function and seat position.
3Productivity
If high bandwidth is provided for video-on-demand services, then service quality is improved, but interference with ground communication systems increases
Solution Approach 1:
The access point dynamically adjusts transmission based on aircraft altitude. At low altitudes, it restricts transmission power and frequency usage to minimize interference with ground-based wireless phone systems. At high altitudes, it enables full-bandwidth transmission for video-on-demand services without ground interference concerns.
Solution Approach 2:
The system applies different transmission characteristics in different operational contexts. The quality and bandwidth of wireless transmission vary based on local conditions (altitude), providing high quality when needed and restricted quality when interference prevention is prioritized.
Data Source
AI summary
Changing the seating configuration when there are wired connections to each seat is difficult. A wireless transmission system and method communicate wirelessly while also preventing interference with the ground communication system. The wireless transmission system wirelessly transmits data signals inside the aircraft, and has an altitude zone identification arrangement for determining in which of N altitude zones the aircraft is flying, access points that can transmit the data signals wirelessly on any one frequency band selected from among M frequency bands, client units for receiving the data signals, and a selection unit for selecting one of the M frequency bands based on the altitude zone in which the aircraft is flying. The altitude zone identification arrangement includes an aircraft altitude detection unit and system control unit, and the selection unit includes the system control unit.