Terminal Device Reception Failure Detection via Position Data
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Solution Overview
Problem
In communication systems, detecting reception failures is challenging, especially when broadcast transmission is used, as response signals are not typically returned, making it difficult to determine if a terminal device's reception functionality is operating correctly.
Innovation Solution
A terminal device includes a receiver, storage for a list of position information, an acquirer for obtaining its own position, a determiner to assess if a packet signal can be received based on the list and position information, and an estimator to predict reception failures if the signal is not received when expected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If broadcast transmission is used, then the transmission function can operate without response signals, but it becomes difficult to detect reception failures
Solution Approach 1:
The patent implements a feedback mechanism where the terminal device uses its own transmission signals as reference for detecting reception failures. By comparing the quality of transmitted signals with expected reception conditions, the system can infer whether other devices are experiencing reception issues, even without direct response signals.
Solution Approach 2:
The patent introduces signal quality metrics and transmission characteristics as intermediary indicators to detect reception failures. Instead of direct feedback, the system uses measurable signal properties (power, quality, reception condition) as intermediaries to infer the status of communication links.
2Reliability
If response requests are broadcast to check transmission function, then the transmission functionality can be verified, but response signals interfere with normal communication when devices are densely distributed
Solution Approach 1:
The patent enables each terminal device to independently verify transmission functionality using its own transmitted signals as the test stimulus. Instead of relying on external response requests that cause interference, devices self-test by analyzing their own signal characteristics and expected reception conditions, eliminating the need for additional test traffic.
Solution Approach 2:
The patent extracts the transmission verification function from the communication protocol itself, separating it from the need for response signals. By using inherent transmission characteristics and signal quality metrics, the system extracts verification capability without adding interfering response message traffic to the communication channel.
Data Source
AI summary
A receiver receives a first packet signal including first position information indicating a position of a radio device from the radio device. A storage stores a list containing the first position information. An acquirer obtains second position information indicating the position of the terminal device. A determiner determines whether it is possible for the receiver to receive a second packet signal from the radio device based on the second position information and on the first position information contained in the list. An estimator estimates that a reception failure occurs in the receiver if the receiver fails to receive the second packet signal when the determiner determines that it is possible to receive the second packet signal.