Whitespace Device Spectrum Feedback Database Query
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Solution Overview
Problem
Conventional approaches for utilizing whitespace channels in the broadcast spectrum are costly, inefficient, and prone to inaccuracies due to the lack of precise channel usage reporting, leading to potential interference and suboptimal spectrum allocation.
Innovation Solution
A whitespace device transmits a database query to a regulatory authorized database system, providing data on channels used during a previous time period, allowing the system to identify available channels for the current period and populate a spectrum utilization database, enabling accurate feedback and opportunistic communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional detection approaches are used to find available whitespace channels, then the whitespace device can identify unassigned channels, but the process is costly, inefficient, and prone to inaccuracies
Solution Approach 1:
The patent implements a feedback mechanism where whitespace devices report actual channel usage data back to the database system. This feedback loop enables the system to learn from real-world usage patterns and improve channel allocation accuracy over time, resolving the contradiction between detection precision and allocation efficiency
Solution Approach 2:
The database system pre-populates whitespace channel information based on licensed transmitter data before devices need to use them. By performing preliminary analysis and preparation of channel availability data, the system eliminates the need for costly real-time detection by individual devices, improving both accuracy and efficiency
2Reliability
If whitespace devices perform independent channel detection, then they can identify available channels, but interference and suboptimal allocation occur due to lack of centralized coordination
Solution Approach 1:
The patent introduces a centralized database system as an intermediary between licensed transmitters and whitespace devices. This intermediary consolidates channel availability information and provides coordinated access to whitespace channels, ensuring reliable interference avoidance without requiring complex peer-to-peer detection and coordination mechanisms among devices
Solution Approach 2:
The database system automatically updates and maintains channel availability information based on licensed transmitter data without requiring manual intervention. The system serves itself by continuously monitoring and adjusting whitespace allocations, reducing the complexity of manual coordination while maintaining high reliability
Data Source
AI summary
Various technologies described herein pertain to providing spectrum utilization feedback from a whitespace device. A database query for a set of available channels in a spectrum (e.g., broadcast spectrum, etc.) during a time period can be transmitted from the whitespace device to a regulatory authorized database system. The database query includes data that specifies a set of channels used by the whitespace device during a previous time period prior to the time period. Responsive to the database query, a response can be received at the whitespace device from the regulatory authorized database. The response indicates the set of available channels in the spectrum during the time period, where the available channels are unassigned to licensees at a location of the whitespace device during the time period. Moreover, the whitespace device is configured to opportunistically communicate in the spectrum over one or more of the available channels.