Wireless Communication Unit Range Measurement Authentication
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Solution Overview
Problem
Existing wireless USB systems face challenges in rapidly authenticating communication units, particularly when multiple units are present, leading to user frustration due to variable RF receiving levels and the inability to accurately measure range, resulting in failed connections.
Innovation Solution
A wireless communication unit equipped with a measurement unit to determine the range to other communication units and an authentication unit that selects the nearest unit for authentication based on measured range, facilitating quick and successful connections among multiple units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If authentication is performed among multiple communication units without range measurement, then authentication process can be initiated, but connection reliability deteriorates because the nearest desired unit cannot be reliably selected
Solution Approach 1:
The measurement unit performs range measurement before the authentication unit initiates authentication, allowing the system to pre-identify the nearest communication unit and select it for authentication, ensuring reliable connection to the desired unit
2Measurement precision
If RF receiving level is used to measure range, then range measurement can be performed, but measurement precision deteriorates because RF receiving level is variable and inaccurate
Solution Approach 1:
The patent replaces the unreliable RF receiving level measurement with time-of-flight measurement, using electromagnetic signal transmission time to calculate distance, which provides accurate and stable range measurement independent of RF signal strength variations
3Reliability
If authentication is repeated multiple times to ensure successful connection, then connection reliability may improve, but productivity deteriorates due to repeated authentication processes
Solution Approach 1:
The measurement unit measures range and identifies the nearest communication unit before authentication begins, allowing the authentication unit to target the correct unit from the first attempt, eliminating the need for repeated authentication processes
Data Source
AI summary
Conventionally, when a communication unit needed to apply an authentication process to other communication units, a problem arose in that the communication unit could not be quickly connected to a communication unit near a user and to which the user wishes the communication unit to connect. In this invention, a station measures a range to other communication units in the surrounding area and possesses a trigger, which is initiated by a user, for beginning an authentication process; when initiated, the station selects the nearest communication unit based on the result of the measurement and applies the authentication process to it.