Reference Signal Configuration for Overlapping Frequency Resources
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Solution Overview
Problem
Current communication systems face challenges in efficiently configuring and managing different reference signals in communication systems, leading to suboptimal frequency domain resource utilization and interference between reference signals.
Innovation Solution
A method where a network device configures first and second reference signals with overlapping time elements, utilizing different subcarrier spacings and transmission types to ensure frequency domain resource overlap, reducing interference and improving signal-to-interference ratio by employing time domain repetition equivalent to frequency domain zero padding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network device configures reference signals with non-overlapping frequency domain resources when time elements overlap, then interference between reference signals is avoided, but frequency domain resource utilization is reduced
Solution Approach 1:
The patent introduces a new dimension of subcarrier spacing configuration to resolve the contradiction. By allowing reference signals to occupy overlapping frequency domain resources when using different subcarrier spacings (e.g., first reference signal with 15 kHz spacing, second reference signal with 30 kHz spacing), the system enables frequency domain resource overlap without causing harmful interference, thereby improving frequency domain resource utilization while maintaining signal quality through dimensional differentiation in subcarrier spacing.
2Quantity of substance
If the network device allows frequency domain resource overlap between reference signals with different subcarrier spacings, then frequency domain resource utilization is improved, but interference between reference signals may increase
Solution Approach 1:
The patent changes the subcarrier spacing parameter to resolve the interference issue. By configuring reference signals with different subcarrier spacings (e.g., first reference signal with spacing of 15 kHz, second reference signal with spacing of 30 kHz), the patent enables frequency domain resource overlap while the different spacing parameters prevent harmful interference, thus improving frequency domain resource utilization without sacrificing signal quality.
Solution Approach 2:
The patent applies local quality differentiation by assigning different subcarrier spacing characteristics to different reference signals. The first reference signal uses one subcarrier spacing configuration while the second reference signal uses another, allowing each reference signal to have optimized local properties in the frequency domain, enabling coexistence with overlapping resources without mutual interference.
3Reliability
If the network device uses time domain repetition for reference signals, then signal-to-interference ratio is improved, but time domain resource consumption increases
Solution Approach 1:
The patent uses time domain repetition (copying) of reference signals to improve signal-to-interference ratio. By transmitting the same reference signal multiple times in the time domain, the system enhances the signal strength and improves the signal-to-interference ratio at the receiver, at the cost of increased time domain resource consumption. This copying approach provides robustness against interference through temporal redundancy.
Data Source
AI summary
A method includes sending, by a network device, first configuration information, and sending, by the network device, second configuration information. The first configuration information is useable to map a first reference signal to a first resource element set in a first time element. The first resource element set includes at least a first resource element. The second configuration information is useable to map a second reference signal to a second resource element set in a second time element. The second resource element set includes at least a second resource element. A frequency domain resource occupied by the first resource element overlaps a frequency domain resource occupied by the second resource element in response to the first time element and the second time element overlapping each other in a time domain.