Relay Satellite Optical Link Control Under Aggregate Data Rate Limits
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Solution Overview
Problem
Conventional communication systems face challenges in transmitting data from multiple satellites to ground stations or other equipment while adhering to a predetermined data rate limit, leading to inefficiencies and underutilization of communication lines.
Innovation Solution
A communication control apparatus and method that controls parallel optical communication between multiple satellites and a communication relay satellite, setting data rates to ensure that the sum of communication rates between satellites and the relay satellite does not exceed the limit value for communication with ground stations, allowing simultaneous data transmission from multiple satellites.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If parallel optical communication is performed with multiple satellites simultaneously, then the data transmission capacity increases, but the data rate limit between the relay satellite and ground station is exceeded
Solution Approach 1:
The patent implements dynamic control of communication parameters by adjusting the data rates of individual satellite links based on real-time conditions and the aggregate capacity of the relay-to-ground channel. The communication control apparatus continuously monitors and adjusts transmission rates to maintain compliance with data rate limits while maximizing overall throughput, transforming a static rate allocation into a dynamic adaptive system.
Solution Approach 2:
The patent changes the data rate parameter of individual satellite communications based on the total capacity constraints. By adjusting the data rate of each satellite link dynamically, the system optimizes the sum of data rates to match the relay-to-ground channel capacity, thereby resolving the contradiction between transmitting more data and adhering to rate limits.
2Reliability
If data rates are reduced to comply with limit values, then data rate limit compliance is maintained, but the utilization of communication lines decreases
Solution Approach 1:
The patent optimizes data rate parameters to achieve the maximum possible sum of data rates that does not exceed the limit value. By precisely adjusting parameters rather than simply reducing them, the system maintains compliance while maximizing communication line utilization, avoiding unnecessary capacity waste.
Solution Approach 2:
The communication control apparatus implements feedback control by monitoring the aggregate data rate and adjusting individual satellite link rates to maintain optimal utilization. The system continuously evaluates the sum of data rates and modifies parameters in response to maintain compliance while maximizing throughput, creating a self-regulating system that prevents both underutilization and overload.
3Productivity
If the number of optical communication sections is increased to handle more satellites, then the number of satellites that can communicate simultaneously increases, but the device complexity increases
Solution Approach 1:
The patent makes existing optical communication sections multi-functional by enabling them to dynamically serve different satellites at different times and adjust their data rates accordingly. Rather than requiring dedicated hardware for each satellite, the same communication sections handle multiple satellites through flexible parameter control and time-multiplexed operation, reducing hardware complexity while maintaining high productivity.
Solution Approach 2:
The system introduces dynamic allocation of communication resources where existing optical sections can be dynamically assigned to different satellites based on demand and channel conditions. This dynamic reconfiguration allows a fixed number of communication sections to handle a variable and potentially larger number of satellites over time, avoiding the need to increase hardware complexity proportionally with the number of satellites.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient transmission of data from a greater number of satellites to ground stations or other equipment while maintaining data rate limits, optimizing line utilization and ensuring timely data delivery.
Implementation Method 1
plural optical communication sections 14A to 14C that are capable of performing parallel optical communication with the plural satellites 3A to 3C
Data Source
AI summary
A communication control apparatus controls optical communication between a communication relay satellite and plural user satellites such that, when the communication relay satellite relays communication between the plural user satellites and other equipment, a sum of data rates representing communication rates per unit time between the plural user satellites and the communication relay satellite is not greater than a limit value of a data rate between the communication relay satellite and the other equipment.