Reference Signal Configuration for NTN Beam Interference Suppression
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Solution Overview
Problem
In non-terrestrial networks (NTN), interference between beams using the same wireless time-frequency resources within a physical cell affects the accuracy of reference signal measurements, leading to reduced system performance, particularly in narrow-band Internet of things (NB-IoT) and enhanced machine type communication (eMTC), as existing methods only address inter-cell interference and not beam interference.
Innovation Solution
Implementing a method to configure reference signal generation modes by associating them with beam-related serial numbers, using techniques such as frequency domain and time domain resource allocation, sequence codes, and beam-level scrambling to suppress interference between beams within the same physical cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If beams in the same physical cell use the same wireless time-frequency resources, then resource utilization is improved, but interference between beams increases
Solution Approach 1:
The patent segments the reference signal resources by introducing beam-related serial numbers that differentiate reference signals across different beams. This segmentation allows multiple beams to use the same time-frequency resources while maintaining distinguishable reference signals through different beam identifiers, thereby resolving the interference issue while preserving resource utilization efficiency.
Solution Approach 2:
The patent applies local quality by configuring reference signal parameters (such as sequence initialization values) based on local beam characteristics. Each beam receives customized reference signal configuration using its specific beam-related serial number, enabling differentiated reference signal generation for different beams while allowing them to share the same physical cell and time-frequency resources.
2Measurement precision
If beam-level interference suppression is implemented, then reference signal measurement accuracy is improved, but system complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring beam-related serial numbers and reference signal generation parameters before actual signal transmission. The network device determines and signals the appropriate reference signal configuration (including beam-specific parameters) to the terminal in advance, enabling the terminal to generate and measure reference signals with proper beam differentiation without requiring complex real-time processing.
Solution Approach 2:
The patent utilizes parameter changes by modifying reference signal generation parameters (such as sequence initialization values, cyclic shifts, or resource element mappings) based on beam-related serial numbers. These parameter variations enable the system to distinguish between different beams using the same time-frequency resources, improving measurement accuracy while maintaining manageable system complexity through standardized parameter adjustment mechanisms.
Data Source
AI summary
A signal processing method and apparatus, an information configuration method and apparatus, a device, and a storage medium are provided. The signal processing method includes: receiving reference signal configuration information, the reference signal configuration information including a reference signal generation mode; and processing a signal on the basis of the reference signal configuration information.