DSC Communication Power Control via AIS Distance
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Solution Overview
Problem
Existing vessel radio devices lack the capability to appropriately set transmission output power values for digital selective calling (DSC) communication, leading to inefficiencies in power consumption.
Innovation Solution
A communication device with an AIS receiving section, a DSC communication section, and a transmission output power setting section that adjusts the transmission output power based on the calculated distance to a communication target vessel, allowing for multiple power levels to optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transmission output power value for DSC communication is set to a fixed high value, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The transmission output power value is made dynamic rather than fixed. The system automatically adjusts the power level based on the calculated distance to the communication target vessel, using higher power for distant vessels and lower power for nearby vessels, thereby optimizing both communication reliability and power consumption
Solution Approach 2:
The system changes the transmission output power parameter based on the distance parameter. By calculating the distance to the target vessel and selecting appropriate power levels from predetermined sets corresponding to different distance ranges, the system achieves efficient power management while maintaining communication quality
2Use of energy by moving object
If the transmission output power value is set to a fixed low value, then power consumption is reduced, but communication range is limited
Solution Approach 1:
The transmission output power is dynamically adjusted based on the actual distance to the communication target. The system selects from multiple predetermined power levels corresponding to different distance ranges, allowing the communication range to extend as needed while maintaining low power consumption for nearby vessels
Solution Approach 2:
The system changes the power parameter according to the distance parameter by calculating the distance to the target vessel and selecting the appropriate power level from predetermined sets, thereby expanding communication range when necessary while conserving power when the target is nearby
Data Source
AI summary
A communication device that reduces power consumption is realized by appropriately setting a transmission output power value for DSC communication. A communication device (1) includes: an AIS receiving section (11) for receiving information related to an AIS; a DSC communication section (12) for performing DSC communication; and a transmission output power setting section (15c) configured to set a transmission output power value for communication performed on a conversation channel by the DSC communication section to a value corresponding to a distance, which is calculated based on the information, between the communication device and a communication target vessel.