60GHz Access Point Antenna Scheduling for Aircraft Interference
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Solution Overview
Problem
In-flight entertainment systems face challenges in providing reliable wireless networking due to limited bandwidth and interference in crowded aircraft environments, where the 60GHz spectrum is prone to attenuation and disruption by obstacles, and frequency-hopping is not viable.
Innovation Solution
The system employs a configurable frequency band using 60GHz spectrum with access point devices (ZAPs) managing multiple antennas to transmit data efficiently by assigning fixed time slots to avoid interference, allowing clients to dynamically select antennas based on environmental conditions and manage communication with ZAPs to minimize disruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the 60GHz spectrum is used for wireless communication, then data transfer speed is improved, but reliability deteriorates due to severe attenuation and sensitivity to obstacles
Solution Approach 1:
The system segments the communication function by deploying multiple access points with multiple antennas throughout the aircraft cabin, creating overlapping coverage zones. This segmentation allows clients to switch between different access points and antennas based on signal quality, thereby maintaining reliability while utilizing the high-speed 60GHz spectrum.
Solution Approach 2:
The system dynamically changes communication parameters including frequency selection within the 60GHz band, power levels, and antenna selection based on real-time channel conditions. This allows the system to adapt to attenuation and obstacle interference while maintaining high data transfer speeds.
2Productivity
If multiple access points and clients are deployed in a crowded environment, then network coverage and capacity are improved, but interference among devices increases
Solution Approach 1:
The system implements periodic time-division multiplexing where access points and clients transmit in scheduled time slots rather than continuously. This periodic action reduces interference by ensuring that transmitting and receiving operations occur at different times, allowing multiple access points and clients to coexist in the crowded aircraft environment.
Solution Approach 2:
The system dynamically adjusts transmission parameters, time slot allocations, and antenna selections based on real-time channel conditions and traffic demands. This dynamic adaptation allows the network to optimize performance and minimize interference as the density of access points and clients varies throughout the flight.
3Object-generated harmful factors
If frequency-hopping is used to resolve transmission conflicts, then interference is reduced, but frequency-hopping is not available due to restricted bandwidth
Solution Approach 1:
Instead of relying on frequency-hopping, the system segments the spatial domain by deploying multiple access points with multiple antennas at different locations. This spatial segmentation provides alternative transmission paths without requiring frequency changes, thus resolving interference while operating within the restricted bandwidth.
Solution Approach 2:
The system uses periodic time-division multiplexing with scheduled transmission time slots as an alternative to frequency-hopping. This approach resolves transmission conflicts through time-based separation rather than frequency changes, maintaining adaptability within the restricted 60GHz bandwidth.
Data Source
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AI summary
A system for managing the wireless transmission of data using a configured or fixed frequency, such as the 60GHz spectrum, within a client-dense environment such as an aircraft. The system includes access points ("ZAPs") that control a plurality of antennas according to a time-slotted broadcast schedule such that the transmissions from the antennas do not interfere with each other.