Satellite Sensor Data Transmission Collision Avoidance
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Solution Overview
Problem
In satellite-based IoT scenarios, multiple sensors transmitting data simultaneously cause collisions, leading to data stream overlap and inefficiencies due to existing collision detection and coordination algorithms.
Innovation Solution
A method where a satellite coordinates sensor data transmission by registering sensors and allocating time slots, allowing each sensor to transmit data during a designated period, thereby preventing collisions and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If multiple sensors transmit data simultaneously to a satellite, then data transmission speed is improved, but collisions occur causing data stream overlap and transmission failure
Solution Approach 1:
The satellite performs preliminary actions by broadcasting registration time slots to all sensors before the actual data transmission phase. Sensors register their presence and select time slots in advance, ensuring that when data transmission occurs, collisions are avoided because each sensor transmits in its assigned time window rather than simultaneously attempting to transmit.
Solution Approach 2:
The transmission process is segmented into distinct phases: a registration phase where sensors are identified and time slots are allocated, and a data transmission phase where sensors transmit in their assigned time windows. This segmentation separates the coordination function from the data transfer function, preventing collisions by ensuring temporal separation of transmissions from multiple sensors.
2Reliability
If collision detection and coordination algorithms are used, then transmission reliability is improved, but transmission delays increase due to coordination and repetition
Solution Approach 1:
Coordination is performed in advance during the registration phase, where the satellite allocates time slots to sensors before the data transmission phase begins. This preliminary coordination eliminates the need for post-collision detection and retransmission, as sensors are pre-coordinated to transmit in their assigned time windows, thereby maintaining reliability while minimizing delays.
Solution Approach 2:
Sensors autonomously select their registration time slots from the available options broadcast by the satellite, and then independently transmit their data in the assigned time windows without requiring continuous coordination or acknowledgment during the transmission phase. This self-service approach reduces coordination overhead and eliminates retransmission delays.
Data Source
AI summary
The disclosure relates to a method for transmitting sensor data from multiple sensors to a satellite. In a first phase, which is designated as a registration phase, the satellite registers the sensors in question and allocates each sensor a time window for transmitting the respective sensor data, and in a second phase, which is designated as a transmission phase, the satellite requests the sensor data in the individual sensors in a controlled manner, e.g., according to a list generated by the satellite during the registration phase. Thus, it is possible for satellites to access a ground-based sensor system in an optimized and self-learning manner. The disclosure additionally relates to a satellite suitable for carrying out the aforementioned method.