Frequency Resource Analysis for Wireless IoT Terminals
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Solution Overview
Problem
In wireless communication systems for IoT, terminals selecting transmission frequencies without prior measurements can lead to high interference levels, resulting in undetected uplink messages, which is problematic for applications requiring a minimum quality of service, especially in scenarios like remote monitoring where timely message receipt is critical.
Innovation Solution
The access network analyzes frequency resources within a multiplexing band, estimating detection capabilities for each frequency sub-band and transmitting a quality-of-service spectral map to terminals, indicating favorable sub-bands for message transmission, allowing terminals to select frequencies that ensure a predetermined quality of service without increasing complexity or power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If terminals select transmission frequencies without prior measurements, then terminal complexity and power consumption are reduced, but transmission reliability deteriorates due to high interference levels
Solution Approach 1:
The access network performs preliminary measurements of interference levels across different frequency sub-bands and generates a quality-of-service spectral map in advance. This map is then provided to terminals, enabling them to select transmission frequencies with high reliability without performing their own measurements, thus maintaining low terminal complexity while ensuring reliable transmission.
2Reliability
If terminals regularly select new transmission frequencies, then transmission reliability improves by reducing interference probability, but loss of time increases due to frequent frequency changes
Solution Approach 1:
The access network pre-calculates and provides quality-of-service spectral maps that indicate favorable frequency sub-bands for transmission. Terminals can directly select frequencies from these pre-identified favorable sub-bands without performing time-consuming measurements or frequent frequency hopping, thus achieving reliable transmission while minimizing time loss.
3Reliability
If access network provides detailed frequency analysis to terminals, then transmission reliability improves, but device complexity increases for both access network and terminals
Solution Approach 1:
The access network extracts only the essential information needed for frequency selection - the quality-of-service spectral map indicating favorable sub-bands - and provides this condensed information to terminals. This avoids the need for complex real-time coordination and detailed frequency analysis at both ends, reducing overall system complexity while maintaining transmission reliability.
Data Source
AI summary
A method for analyzing frequency resources within a predetermined multiplexing band. For at least one base station, capabilities for detecting uplink messages respectively in different frequency sub-bands within the multiplexing band are estimated. For each frequency sub-band, a predetermined service quality criterion is assessed depending on the detection capability estimated for the frequency sub-band. A spectral map of service quality for the base station is transmitted. The spectral map is representative of the frequency sub-bands for which the service quality criterion has been verified and the frequency sub-bands for which the service quality criterion has not been verified.