Wireless Device Discoverability Control via Inquiring Device Properties
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Solution Overview
Problem
Bluetooth devices face security concerns when in discoverable modes due to potential eavesdropping and impersonation risks, and existing specifications do not effectively manage visibility and response to inquiry messages, especially when baseband activity interferes.
Innovation Solution
Implementing a method in wireless devices to control visibility by determining whether to respond to inquiry messages based on properties of the inquiring device, such as trusted device identifiers, previously connected devices, and manufacturer compatibility, using criteria stored in memory to manage discoverability modes and secure communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a Bluetooth device is set to discoverable mode (Limited or General), then it can be discovered by other devices, but it becomes vulnerable to security threats such as eavesdropping and impersonation
Solution Approach 1:
The patent applies local quality by making the discoverability response behavior device-specific. Different Bluetooth devices receive different responses based on their individual properties (manufacturer ID, device type, connection history). The inquiring device cannot assume uniform behavior across all devices, and each device can independently decide whether to respond to inquiries based on its own characteristics and stored criteria.
Solution Approach 2:
The patent implements preliminary action by pre-storing criteria and properties of trusted devices in memory before inquiry operations occur. The device maintains a database of manufacturer IDs, device types, and connection histories that are prepared in advance. When an inquiry is received, the device can immediately compare against pre-stored criteria without requiring real-time analysis, enabling rapid secure decision-making.
2Adaptability or versatility
If a device responds to all inquiry messages while discoverable, then it maintains visibility to all devices, but it increases exposure to security risks and baseband interference
Solution Approach 1:
The patent applies partial action by responding to only a subset of inquiry messages rather than all inquiries. The device evaluates each inquiry against stored criteria and responds only to those that match trusted device profiles. This selective response approach maintains visibility to authorized devices while reducing overall inquiry response rate, thereby minimizing exposure to potential security threats and baseband interference.
3Object-affected harmful factors
If a device uses strict criteria to filter inquiry responses, then it improves security by blocking untrusted devices, but it may prevent legitimate connections from trusted manufacturers
Solution Approach 1:
The patent implements preliminary action by pre-storing criteria and properties of trusted devices in memory before inquiry operations occur. The device maintains a database of manufacturer IDs, device types, and connection histories that are prepared in advance. When an inquiry is received, the device can immediately compare against pre-stored criteria without requiring real-time analysis, enabling rapid secure decision-making.
Solution Approach 2:
The patent applies feedback by using historical connection data to inform future inquiry response decisions. The device stores records of previously connected devices and uses this feedback loop to recognize and prioritize responses from known trusted devices. This feedback mechanism ensures that legitimate connections from established partners are maintained while blocking unknown or suspicious devices.
Data Source
AI summary
A wireless device in a discoverable mode controls its visibility by determining whether to ignore or respond to an inquiry, received from an inquiring device that is searching for discoverable devices, based at least in part on one or more properties of the inquiring device.