Frequency Plan Transmission via Beacon Embedding
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Solution Overview
Problem
Current methods for transmitting a frequency plan in fragmented spectrum telecommunications systems are inefficient, requiring excessive scanning time and often necessitating a dedicated channel for a beacon, which can be impractical due to limited spectral resources.
Innovation Solution
Transmitting the beacon on a single elementary channel while using multicarrier modulation to simultaneously transmit useful signals across multiple channels, allowing the slave device to determine the frequency plan by scanning only the elementary channels, thereby reducing the scanning duration to n.Te.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a slave device performs a scan operation to determine the frequency plan by checking each transmission channel, then the frequency plan can be determined, but the scanning time becomes excessively long (N.Te) especially in fragmented spectrum with many elementary channels
Solution Approach 1:
The patent extracts the frequency plan information from the beacon signal and places it in a readily accessible location within the fragmented spectrum. Instead of requiring the slave device to scan all N elementary channels to discover the frequency plan, the plan is embedded in the beacon which can be received and processed much faster, reducing the determination time from O(N) to a constant time operation.
Solution Approach 2:
The master device performs preliminary action by pre-calculating and embedding the frequency plan information in the beacon signal before transmission. This allows the slave device to receive the frequency plan directly without performing the time-consuming scan operation, as the information is already prepared and available in the incoming beacon.
2Ease of operation
If a dedicated channel is used for beacon transmission to convey the frequency plan, then the frequency plan transmission is simplified, but spectral resources are wasted as the dedicated channel cannot be used for useful signal transmission
Solution Approach 1:
The patent makes the beacon transmission multi-functional by embedding the frequency plan information within the beacon signal that is transmitted on existing useful signal channels. The same transmission infrastructure carries both the useful signals and the frequency plan information, eliminating the need for a separate dedicated channel and maximizing spectral resource utilization.
Solution Approach 2:
The patent merges the frequency plan transmission function with the useful signal transmission by embedding the plan information in the beacon that rides on the same channels. This combining of functions allows the spectral resources to serve dual purposes: carrying useful data and conveying frequency plan information simultaneously.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces the time required for a slave device to determine the frequency plan and eliminates the need for a dedicated beacon channel, optimizing spectral resource usage and enabling faster system participation.
Implementation Method 1
transmission by the first device of a first signal comprising a succession of first data by modulation of the first data simultaneously on several elementary channels of the plurality of elementary channels
Implementation Method 2
transmission of a second signal representing a plan of use of the plurality of elementary channels comprising a succession of second data at least by modulation of all the second data on a single elementary channel among said several elementary channels
Data Source
Figure 1~5
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Figure 9~11
AI summary
The invention relates to a method of transmitting data over a frequency spectrum divided into a plurality of distinct elementary channels, between a first device (12) and a second device (14), comprising the transmission by the first device of a first signal comprising a succession of first data by modulation of the first data simultaneously on several elementary channels of the plurality of elementary channels and the transmission of a second signal representing a plan of use of the plurality of elementary channels comprising a succession of second data at least by modulation of all the second data on a single elementary channel among said several elementary channels.