Ship Navigational Data Thinner for Channel Capacity Adaptation
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Solution Overview
Problem
Marine communications, such as satellite communications, face challenges in consistently sharing large amounts of navigational data due to varying channel capacity.
Innovation Solution
A ship information sharing device that includes an acquirer, a channel capacity acquirer, a thinner, and a transmission processor. The device serially acquires navigational data, determines the channel capacity, adjusts the frequency of data transmission based on the channel capacity, and transmits the data to a ship information gathering device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If navigational data is transmitted at a high frequency to ensure data completeness and accuracy, then information quality is improved, but channel capacity is exceeded when communication conditions deteriorate
Solution Approach 1:
The transmission frequency is made dynamic by adjusting it according to the detected channel capacity. The thinner unit changes the frequency at which navigational data is included in transmission data sets based on real-time channel conditions, allowing the system to adapt to varying communication capacities while maintaining data quality within available bandwidth
Solution Approach 2:
The system changes the parameter of transmission frequency based on channel capacity detection. By modifying this key parameter according to communication conditions, the system optimizes data transmission to match available channel resources, preventing channel overload while maintaining necessary data flow
2Loss of information
If all navigational data is transmitted regardless of channel capacity, then data availability is maximized, but transmission reliability decreases due to channel overload
Solution Approach 1:
The system transmits a partial set of navigational data by selectively including only certain data in transmission data sets when channel capacity is limited. The thinner unit determines which data to include based on channel conditions, transmitting enough information to maintain operational reliability without overwhelming the channel
Solution Approach 2:
The system detects channel capacity and uses this feedback to adjust transmission frequency. This closed-loop control ensures that transmission reliability is maintained by adapting to actual channel conditions, preventing overload while maximizing data availability within available capacity
3Reliability
If data transmission frequency is increased to maintain situational awareness, then navigation safety is improved, but energy consumption increases
Solution Approach 1:
The transmission frequency is dynamically adjusted based on detected channel capacity rather than operating at a fixed high frequency. This dynamic adaptation reduces energy consumption during periods of poor channel conditions while maintaining safety-critical transmission rates when channel capacity is sufficient
Data Source
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AI summary
A ship information sharing device capable of sharing navigational data of an amount suitable for a channel capacity is provided. The ship information sharing device includes an acquirer, a channel capacity acquirer, a thinner, and a transmission processor. The acquirer serially acquires navigational data according to navigation of a ship, which is detected by a detection apparatus mounted on the ship. The channel capacity acquirer acquires a channel capacity of a channel to a ship information gathering device. The thinner changes, according to the channel capacity, a frequency to include the navigational data into a transmission data set serially transmitted to the ship information gathering device. The transmission processor transmits the transmission data set to the ship information gathering device.