White Space Database Discovery for TV Spectrum Access
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Solution Overview
Problem
Devices operating in white space frequency bands face challenges in discovering and accessing certified TV white space databases, as these databases are limited, dynamic, and require accurate location-based frequency allocation to avoid interference with licensed spectrum usage.
Innovation Solution
A method for user equipment to send requests to a server for white space database discovery, including options for obtaining addresses of certified databases, handling updates, and managing temporary or permanent shutdowns, ensuring continuous access to available white space frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a device relies on a master device to obtain available frequencies from the database, then the slave device can operate without knowing its location or having database access functionality, but the system becomes dependent on the master device's availability and functionality
Solution Approach 1:
The patent enables slave devices to independently discover and access white space databases without requiring a master device. Each slave device can autonomously perform database discovery, select appropriate databases, and retrieve frequency information directly, eliminating dependency on master devices while maintaining ease of operation.
2Reliability
If the database provides location-based frequency allocation to prevent interference with licensed spectrum, then spectrum usage is regulated effectively, but the device must have accurate location information and database access capabilities
Solution Approach 1:
The patent introduces database discovery mechanisms that act as intermediaries between devices and the white space database. The discovery process automatically handles location-based regulation requirements, allowing devices to access regulated frequency information without needing to implement complex location management or database access functionality themselves.
3Adaptability or versatility
If the white space database is dynamic and may become unavailable, then the system must adapt to changes, but frequent database changes or outages disrupt device operation
Solution Approach 1:
The patent implements preliminary database discovery and selection before actual frequency access is needed. Devices can pre-identify available databases, their locations, and access parameters in advance, creating a buffer against future database changes or outages. This preliminary action ensures operational stability by having backup options ready before problems occur.
Data Source
AI summary
Methods and apparatus, including computer program products, are provided for white space database discovery. In one aspect there is provided a method. The method may include sending, by a user equipment, a request to a server including a white space database, wherein the server is located at a first address; and receiving, at the user equipment, a response to the request, the response including at least one of an identity of the server or a second address for accessing at least one of the server or another server including another white space database. Related apparatus, systems, methods, and articles are also described.