TV to WLAN Channel Conversion Algorithm
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Solution Overview
Problem
There is a need for an efficient algorithm to convert TV channels with first channel granularity into WLAN channels, particularly in a regulatory domain where licensed and unlicensed devices coexist, requiring accurate determination of center frequencies and bandwidths for seamless operation in wireless local area networks.
Innovation Solution
The method involves receiving a list of available TV channels, determining the center frequency of WLAN channels within the TV channel bandwidth, and using predetermined WLAN channel bandwidth to derive the starting frequency and channel number, enabling efficient conversion between TV and WLAN channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If TV channels with first channel granularity are used, then available spectrum utilization is improved, but compatibility with WLAN scanning operations is worsened
Solution Approach 1:
The patent introduces an intermediary conversion mechanism that translates TV channel frequencies into WLAN channel equivalents. The system maintains a mapping relationship between TV channel center frequencies and corresponding WLAN channels, allowing the scanner to operate using WLAN channel granularity while accurately representing the underlying TV channel spectrum availability. This intermediary layer resolves the contradiction by enabling both fine-grained spectrum utilization and standard WLAN scanning operations.
2Productivity
If unlicensed devices operate in TV White Space, then spectrum efficiency is improved, but protection for incumbent users is worsened
Solution Approach 1:
The patent implements a feedback mechanism where the unlicensed device continuously monitors the operational status of incumbent users in the TV White Space. When an incumbent user is detected on a particular channel, the system receives feedback and automatically adjusts its channel selection or transmission parameters to avoid interference. This feedback loop enables the system to maintain high spectrum efficiency while reliably protecting incumbent users from interference.
3Productivity
If channel conversion algorithm is simplified, then processing speed is improved, but conversion accuracy is worsened
Solution Approach 1:
The patent applies preliminary action by pre-establishing conversion tables and mapping relationships between TV channel frequencies and WLAN channels during system initialization. Rather than performing complex real-time calculations, the system uses pre-computed lookup tables that quickly translate channel frequencies during actual operation. This preliminary preparation enables both high processing speed and accurate conversion by avoiding computationally intensive operations during time-critical scanning and channel selection processes.
Data Source
AI summary
A method of converting TV channels into WLAN channels in a wireless local area network system (WLAN) is disclosed. A method of converting TV channels into WLAN channels at an apparatus comprising receiving WSM including a list of available TV channels and finding out a center frequency of each of first WLAN channels which exist on frequency area of the available TV channels using TV channel bandwidth, WLAN channel bandwidth and a starting frequency of each of the available TV channels, wherein the TV channel bandwidth and the WLAN channel bandwidth are predetermined.