TV White Space Channel Allocation via Geo-Location Accuracy
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Solution Overview
Problem
Existing mechanisms for TV White Space Devices (TVWS) face challenges in accurately determining available channels, especially for Mode II devices indoors without good line-of-sight to GPS satellites, and in managing interference from secondary systems, which limits efficient use of TV White Spaces.
Innovation Solution
A method and apparatus that utilize geo-positioning and LTE networks as a proxy to identify available TVWS channels, consider co-existence with cellular secondary systems, and allocate channels based on geo-location accuracy and cell neighbor lists, minimizing interference by selecting channels with lowest signal power from other network base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Mode II devices use geo-location capability to determine available TVWS channels, then channel availability can be determined, but indoor devices without good line-of-sight to GPS satellites cannot accurately determine their location
Solution Approach 1:
The patent introduces an intermediary system comprising a server and database that mediates between the mobile device and the TVWS channel allocation process. The server receives location data from the device, queries the database for available channels based on the location, and returns the results. This intermediary approach allows indoor devices without direct GPS access to still determine channel availability by using the server as a mediator that processes location information and returns appropriate channel lists.
2Reliability
If TVWS channels are allocated based on strict geo-location accuracy requirements, then interference from primary systems is minimized, but devices with limited location accuracy (indoor devices) cannot operate
Solution Approach 1:
The patent applies local quality by differentiating the channel allocation approach based on the device's operational context. For indoor devices with limited location accuracy, the system uses a different allocation strategy compared to outdoor devices with accurate GPS positioning. The server queries the database for available channels based on the specific location data provided by each device type, allowing indoor devices to operate with their limited accuracy while still receiving appropriate channel assignments that minimize interference.
3Measurement precision
If the system queries the TVWS database for available channels for each device, then channel availability is accurately determined, but the process is time-consuming and complex
Solution Approach 1:
The patent implements universality by creating a universal server-based system that handles channel allocation for multiple device types (Mode I and Mode II devices) through a single unified process. The server performs the same database querying and channel determination function for all devices, regardless of their specific capabilities or locations. This universal approach simplifies the overall system architecture by consolidating the complex channel allocation logic into a single multi-functional server system rather than requiring device-specific complex processing.
Data Source
AI summary
The present invention discloses an apparatus, a method and a computer program for mapping and allocating available television white space channels for a terminal requesting resources. The mapping is based on the data of available overlapping TV white space channels within a geographical tracking area and coexistence with other cellular secondary systems within the area. Furthermore, a location for a moving mode II device may be tracked periodically. The geo-location accuracy of the mode II device affects the TV white space resources which can be allocated to the device.