Aircraft Multimedia Network Synchronization via Hierarchical Controllers
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Solution Overview
Problem
Current multimedia distribution networks on passenger aircraft lack a comprehensive solution for synchronizing the distribution of video, audio, and lighting control data across decentralized cabin systems, leading to inefficiencies and reduced passenger experience.
Innovation Solution
A multimedia distribution network with a hierarchical structure, featuring a head controller, intermediate controllers, and end device controllers, where the head controller transmits multicast streams of multimedia control signal packets, and intermediate controllers process and distribute these packets with controllable delays based on unicast delay queries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a decentralized cabin system is used, then flexibility and intelligence in end devices are improved, but synchronizing distribution of control data becomes more difficult
Solution Approach 1:
The system divides the decentralized cabin network into hierarchical segments: head controllers at the top level, intermediate controllers in the middle, and end device controllers at the bottom. This segmentation allows each level to operate independently with appropriate intelligence while maintaining synchronized control through the hierarchical structure.
Solution Approach 2:
Intermediate controllers serve as mediators between head controllers and end device controllers. They receive control data from head controllers, process it locally, and distribute it to end devices, thereby simplifying the synchronization complexity by introducing an intermediary layer that handles coordination.
2Device complexity
If pre-programmed lighting settings are used, then system complexity is reduced, but passenger experience and customer satisfaction are limited
Solution Approach 1:
The lighting system transitions from static pre-programmed settings to dynamic controllable settings. End device controllers can adjust lighting parameters in real-time based on flight phase, passenger needs, and environmental conditions, enhancing passenger experience while maintaining manageable system complexity through the hierarchical control structure.
Solution Approach 2:
The system enables dynamic changes in lighting parameters (intensity, color temperature, timing) controlled by end device controllers rather than fixed pre-programmed values. This allows adaptation to different flight phases and passenger requirements while the hierarchical control architecture keeps the overall system complexity manageable.
3Adaptability or versatility
If synchronized multimedia distribution is implemented, then passenger experience is improved, but network complexity and data distribution challenges increase
Solution Approach 1:
The multimedia distribution network is segmented into hierarchical levels with head controllers managing overall coordination, intermediate controllers handling local distribution, and end device controllers executing synchronized playback. This segmentation reduces network complexity by distributing control functions across multiple levels rather than requiring a single complex centralized system.
Solution Approach 2:
Intermediate controllers act as mediators in the multimedia distribution network, receiving control data from head controllers and distributing it to end devices. This intermediary layer simplifies the data distribution process by breaking down the complex task of synchronized multimedia delivery into manageable segments handled at each hierarchical level.
Data Source
Figure 1~6
AI summary
A multimedia distribution network, in particular for use on board of a passenger aircraft, includes a first network node configured as a head controller, a plurality of second network nodes configured as a plurality of intermediate controllers connected to the first network node, and a plurality of third network nodes configured as a plurality of end device controllers, each connected to one of the plurality of second network nodes. The head controller is configured to transmit a multicast stream of multimedia control signal packets for controlling the plurality of end device controllers to the plurality of intermediate controllers. The plurality of intermediate controllers are configured to periodically transmit unicast delay queries to the head controller, to process the received multimedia control signal packets to the end device controllers and to distribute processed multimedia control signal packets with a controllable delay based on the content of unicast delay indicator signals sent by the head controller to the plurality of intermediate controllers in response to the unicast delay queries.