Satellite Data Encoding Control via Ground Station Parameter Adjustment

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Solution Overview

Problem

Existing data encoding systems for compressing sensing data from flying objects, such as satellites, face challenges in controlling compression parameters from the ground and require pre-setting multiple compression methods based on image features.

Innovation Solution

A data encoding system comprising a data encoding device on a flying object and a data encoding control device in a ground station, where the control device detects the sensed position, determines compression parameters, and notifies them to the encoding device, allowing the encoding device to compress data accordingly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If compression algorithms are pre-set based on image features on the flying object, then image compression can be performed, but control of compression parameters from the ground is difficult

Engineering Contradiction:

Improvecontrol of compression parametersVSAvoidcompression parameter setting complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

A communication interface is introduced as an intermediary between the ground station and the flying object. The ground station sends compression parameter control signals through this interface to the data encoding device on the flying object, enabling remote control without requiring complex local decision-making systems on the satellite.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system implements feedback control where the ground station receives information about the sensing data (such as image features or compression results) and adjusts compression parameters accordingly. This closed-loop feedback mechanism enables optimal compression parameter selection based on actual data characteristics while maintaining ground-based control.

Inventive Principle:

Principle #23Feedback

2Adaptability or versatility

If multiple compression methods are pre-set to be selectable, then appropriate compression can be achieved, but device complexity increases

Engineering Contradiction:

Improvecompression method adaptabilityVSAvoidcompression algorithm selection complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The system transitions from static pre-set compression methods to dynamic parameter adjustment. Instead of having multiple fixed algorithms, the data encoding device receives real-time compression parameter values (such as quantization levels, bit rates, or quality factors) from the ground station and adapts its encoding behavior dynamically, reducing the need for multiple pre-configured methods.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The invention changes the approach from selecting different compression algorithms to adjusting compression parameters within a single algorithm framework. By varying parameters such as quality factor, bit rate, or quantization step size based on ground station control and data characteristics, the system achieves adaptability without implementing multiple complex compression methods.

Inventive Principle:

Principle #35Parameter changes

3Manufacturing precision

If compression parameters are calculated on the flying object, then local optimization is achieved, but costs and computational resources are increased

Engineering Contradiction:

Improvecompression parameter optimizationVSAvoidcomputational resource consumption

Core Design Contradiction:

Manufacturing precisionVSUse of energy by moving object

Solution Approach 1:

The computationally intensive task of determining optimal compression parameters is extracted from the flying object and transferred to the ground station. The data encoding device on the satellite simply receives pre-calculated parameter values via communication, significantly reducing the computational burden on the satellite while maintaining optimization quality through ground-based processing power.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS10869037B2Data encoding system, data encoding device, data encoding control device, data encoding method, data encoding control method, and program recording medium

Publication Date: 2020.12.15 NEC CORP

AI summary

To provide a data encoding system that can control compression parameters when compressing sensing data in a flying object without setting a compression method in advance. The data encoding control device installed in a ground station detects a position on earth sensed by the sensor, determines information about a compression parameter of sensing data acquired through sensing performed by the sensor, based on the detected position, and notifies, to the data encoding device, the information about the determined compression parameter. The data encoding device acquires the information about compression parameter notified from the data encoding control device, and compresses sensing data acquired through sensing performed by the sensor, according to the acquired information about the compression parameter.