Targeted Device Discovery in WHDI Networks
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Solution Overview
Problem
Wireless Home Digital Interface (WHDI) networks lack effective security measures to protect user privacy and prevent unauthorized devices from joining the network, as conventional wireless technologies are not equipped to handle high-bandwidth multimedia content transmission securely.
Innovation Solution
A method for secure device registration in WHDI networks using Personal Identification Numbers (PINs) and domain key distribution, which involves verifying device certificates, generating and verifying PINs, and employing targeted discovery mechanisms to control device access, ensuring only authorized devices can join the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional wireless technologies (802.11, BLUETOOTH) are used for wireless communication, then wireless connectivity is achieved, but bandwidth is insufficient to transmit uncompressed multimedia content
Solution Approach 1:
The patent segments the device identification process into multiple stages: initial device list generation, filtered device list creation, and final connection establishment. This segmentation allows the system to maintain security by controlling information disclosure at each stage while enabling high-bandwidth communication for authorized devices.
Solution Approach 2:
The system performs preliminary actions by generating a device list and filtered device list before actual connection establishment. This preliminary identification phase allows security verification to occur before committing to high-bandwidth communication channels, resolving the contradiction between bandwidth availability and security.
2Ease of operation
If device identification is made public in wireless networks, then device discovery is enabled, but user privacy is compromised
Solution Approach 1:
The patent applies local quality by providing different levels of device information to different users. Authorized users receive complete device details from the device list, while unauthorized users only see the filtered device list with limited information. This resolves the contradiction between ease of device discovery for authorized users and privacy protection from unauthorized users.
Solution Approach 2:
The system introduces an intermediary mechanism (the filtered device list) between the actual device information and unauthorized users. This intermediary layer allows the system to maintain user privacy by filtering sensitive information while still enabling legitimate device discovery and connection processes.
3Adaptability or versatility
If all devices are made discoverable in the network, then comprehensive device access is achieved, but network security is weakened
Solution Approach 1:
The patent implements dynamic device visibility by allowing devices to appear in the filtered device list based on current network conditions and authorization status. Devices can be dynamically added or removed from the filtered list without requiring complete network reconfiguration, enabling adaptable access control while maintaining security against unauthorized access.
Solution Approach 2:
The system uses partial action by providing device access information selectively rather than completely. The filtered device list contains only the subset of devices that should be accessible to current users, preventing unauthorized access while maintaining necessary device discoverability for authorized connections.
Data Source
AI summary
A targeted discovery between a first device and a second device in a network, in particular, a WHDI network, provides discovery for an identified device or a group of identified devices. The targeted discovery determines an identifier for a second device or a group of devices that the second device belongs to, and sends a device discovery message to the second device using the identifier for the second device when the second device is configured to respond to the device discovery message if the device discovery message includes the identifier for the second device. The first device receives a response to the device discovery message from the second device and can start further communication with the second device.