Wireless Device Connection Using RSSI Rise-Rate Detection
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Solution Overview
Problem
Existing wireless communication systems face issues with connecting to unintended wireless communication devices due to the non-proportional relationship between received signal strength indicator (RSSI) and distance, often caused by obstacles or anisotropy, leading to incorrect connections.
Innovation Solution
Implementing a wireless communication apparatus with a controller unit that sets thresholds for the increasing rate of RSSI and checks for registered device identifications to determine valid connections, preventing connections to unintended devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If connection is determined based on received signal strength indicator (RSSI) alone, then connection process is simple, but connection to unintended wireless communication devices occurs
Solution Approach 1:
The patent changes the parameter for connection determination from static RSSI threshold to dynamic RSSI increase rate (dRSSI/dt). By monitoring how quickly the signal strength increases over time, the system can distinguish between devices that are genuinely approaching (intended connection) and devices that are stationary or moving away (unintended connection), thereby improving connection accuracy without significantly increasing system complexity
Solution Approach 2:
The system continuously monitors RSSI changes and uses this feedback to dynamically adjust connection decisions. By comparing the calculated RSSI increase rate against a threshold, the system receives real-time feedback about the connection candidate's movement status, enabling it to make informed connection determinations and avoid connecting to unintended devices
2Productivity
If RSSI threshold is set low to allow more connections, then connection opportunities increase, but connection to unintended devices increases
Solution Approach 1:
Instead of using a fixed RSSI threshold that either restricts or permits connections broadly, the patent introduces a new parameter: the rate of RSSI increase (dRSSI/dt). This parameter change enables the system to evaluate connection candidates based on their movement dynamics rather than static signal strength, allowing the system to maintain lower RSSI thresholds (increasing opportunities) while filtering out unintended connections through velocity-based discrimination
3Measurement precision
If scanning continuously monitors all devices, then connection accuracy improves, but energy consumption increases
Solution Approach 1:
The system performs partial monitoring by focusing computational resources only on evaluating the rate of change of RSSI for detected devices, rather than analyzing all possible parameters of all devices. This partial action approach maintains measurement precision for the critical movement indicator while reducing overall scanning complexity and energy consumption compared to comprehensive device profiling
Data Source
AI summary
A wireless communication apparatus is provided for preventing connection to an unintended wireless communication device. The apparatus includes a controller unit that performs scanning for the wireless communication device and connecting to the wireless communication device; and a memory unit that stores a first threshold for determining whether to connect to the wireless communication device. Moreover, the first threshold relates to an increasing amount per unit time of a received signal strength indicator of a signal from the wireless communication device. In the scanning, the controller unit connects to the wireless communication device when the increasing amount per unit time of the received signal strength indicator of the signal received from the wireless communication device is higher than or equal to the first threshold.