LPWA Communication Device Speed Control for Position Data
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Solution Overview
Problem
Existing LPWA communication devices struggle to maintain a high reception success rate for position information when the device is moving, especially indoors, due to weakened transmission signals.
Innovation Solution
A communication device equipped with a position information acquisition unit, a storage unit, a first communication unit for LPWA-compliant wireless communication, a movement detection unit, and a control unit that adjusts communication speed based on whether the device is outdoors or indoors, and changes communication speed when movement is detected outdoors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device transmits position information at a fixed communication speed, then the communication system is simple to operate, but the reception success rate decreases when the device is moving outdoors
Solution Approach 1:
The communication speed is dynamically adjusted based on movement detection. When the movement detection unit detects that the terminal device is moving outdoors, the control unit increases the communication speed to complete transmission before signal degradation occurs. This dynamic adjustment resolves the contradiction by adapting the communication parameters to real-time conditions, improving reception success rate without requiring complex manual control.
Solution Approach 2:
The system uses feedback from the movement detection unit to control communication speed. The detection of movement state and location (indoor/outdoor) provides feedback that triggers automatic communication speed adjustment. This closed-loop control improves reliability by responding to actual device conditions while keeping the system操作简单 through automatic control.
2Reliability
If the terminal device retransmits position information when movement is detected, then the position information can be resent, but the reception success rate remains low because the device is still moving at the time of retransmission
Solution Approach 1:
The system performs preliminary action by detecting movement and automatically adjusting communication speed before transmission issues occur. Instead of waiting for transmission failure and then retransmitting, the system proactively changes communication parameters when movement is detected, ensuring successful transmission in the first attempt and avoiding time delays associated with retransmission.
Solution Approach 2:
The communication speed is dynamically changed based on real-time movement detection rather than using fixed retransmission protocols. This dynamic approach allows the system to adapt transmission parameters immediately when movement is detected, reducing the time loss that would occur with standard retransmission delays.
3Reliability
If the communication device uses standard LPWA communication speed, then power consumption is low, but the reception success rate decreases when moving outdoors due to signal weakening
Solution Approach 1:
The communication speed parameter is changed based on movement detection and location. When the terminal device is detected to be moving outdoors, the communication speed is increased from standard LPWA speed to a higher speed to ensure successful transmission before signal degradation. This parameter change improves reception success rate while minimizing power consumption by only increasing speed when necessary rather than maintaining high speed continuously.
Data Source
AI summary
A communication device is a communication device that transmits detection information including position information based on an LPWA communication system, and includes a position information acquisition unit that acquires the position information based on a positioning signal, a storage unit that stores the detection information, a first communication unit that performs LPWA-compliant wireless communication, a movement detection unit that detects movement of the communication device, and a control unit that controls a communication speed of the wireless communication by the first communication unit, in which the control unit determines whether the communication device is outdoors or indoors based on the positioning signal received by the position information acquisition unit, and when the communication device is determined to be outdoors and the movement detection unit detects movement of the communication device, the control unit changes the communication speed.