CED Frequency Width Control for Robust Signal Retransmission
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Solution Overview
Problem
Existing coverage enhancing devices (CEDs) face limitations in spectrum availability due to sharing bandwidth with multiple receiver nodes, leading to poor robustness, latency, and throughput in wireless communication.
Innovation Solution
A CED controlling node configures the CED to retransmit signals over a different frequency bandwidth, expanding the signal's frequency width to improve diversity, thereby enhancing robustness and reducing latency and increasing throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the CED retransmits signals using the same frequency bandwidth as received from the transmitter node, then the bandwidth resources between the transmitter node and CED are efficiently utilized, but the signal diversity and robustness are limited due to spectrum sharing with multiple receiver nodes
Solution Approach 1:
The patent applies frequency dimension expansion by configuring the CED to retransmit signals over a wider frequency bandwidth than received. This dimensional change in frequency domain allows the system to achieve better signal diversity and robustness without increasing spatial or temporal complexity, directly resolving the contradiction between reliability and resource management
2Productivity
If the CED retransmits signals over a wider frequency bandwidth, then the signal diversity, robustness, and throughput are improved, but the bandwidth resources between the transmitter node and CED are consumed more rapidly
Solution Approach 1:
The patent implements local quality optimization by applying different frequency bandwidth configurations to different segments of the communication system. Specifically, the CED is configured to use wider frequency bandwidth for retransmission to the wireless device while the transmitter node maintains efficient bandwidth utilization, allowing high throughput at the receiving end without excessive resource consumption at the transmitting end
3Loss of time
If the CED retransmits signals over a wider frequency bandwidth, then the latency is reduced through improved signal diversity, but the bandwidth resources between the transmitter node and CED are used less efficiently
Solution Approach 1:
The patent introduces the CED as an intermediary device that performs frequency bandwidth transformation. The CED receiving node and transmitting node act as mediators that convert the signal from the original frequency bandwidth to an expanded frequency bandwidth, enabling reduced latency through diversity gain while maintaining efficient resource management at the original transmitter node through proper configuration messaging
Data Source
AI summary
A method is disclosed, performed by a coverage enhancing device (CED) controlling node, for controlling a CED. The method comprises transmitting, to the CED, a configuration message, the configuration message comprising a frequency width parameter. The frequency width parameter is indicative of a frequency width adjustment to be applied by the CED to a signal retransmitted by the CED.