Wireless Signal Detection Simplification via Subcarrier Mapping
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Solution Overview
Problem
In wireless communication systems, terminals face complexity and reduced communication efficiency when initiating access due to the need to consider various signal configurations resulting from different subcarrier spacings, leading to a complex access process.
Innovation Solution
The system employs a method where signals sent based on different subcarrier spacing parameters occupy the same quantity of subcarriers in the frequency domain and the same time length in the time domain, allowing terminals to ignore the impact of signal configurations and simplify the detection process by generating and sending OFDM symbols that satisfy a multiple relationship between subcarrier spacing system parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the wireless system supports multiple subcarrier spacings to meet different application scenario requirements, then the adaptability and spectrum efficiency are improved, but the terminal access process becomes more complex and communication efficiency decreases
Solution Approach 1:
The network device performs preliminary action by pre-configuring multiple signal sequences corresponding to different subcarrier spacings and notifying the terminal of the specific sequence to be detected before the actual access process. This allows the terminal to prepare in advance and avoid complex real-time analysis of multiple signal configurations during access.
Solution Approach 2:
The patent introduces an intermediary mechanism where the network device sends indication information (intermediary signal) to guide the terminal on which signal sequence to detect. This intermediary reduces the complexity by providing a clear directive rather than requiring the terminal to independently analyze multiple possible configurations.
2Measurement precision
If the terminal considers different signal configurations for different subcarrier spacings during access, then the detection accuracy may be improved, but the access process time increases and communication efficiency decreases
Solution Approach 1:
The network device pre-configures and notifies the terminal of the specific signal sequence to be detected before the access process begins. This preliminary action eliminates the need for the terminal to perform time-consuming analysis of multiple signal configurations during access, thereby reducing access time while maintaining detection accuracy through pre-optimized signal selection.
Solution Approach 2:
The patent segments the signal detection process by dividing it into distinct phases: pre-configuration of multiple signal sequences, selection of the appropriate sequence based on subcarrier spacing, and focused detection of the notified sequence. This segmentation allows the terminal to concentrate computational resources on detecting a single known sequence rather than searching through multiple possibilities.
3Productivity
If the system uses different signal configurations for different subcarrier spacings, then the spectrum efficiency is improved, but the terminal needs to perform complex analysis increasing device complexity
Solution Approach 1:
The network device acts as an intermediary by providing indication information that directly tells the terminal which signal sequence corresponds to the current subcarrier spacing. This eliminates the need for the terminal to perform complex analysis to determine the appropriate signal configuration, while still allowing the system to utilize different signal configurations for different subcarrier spacings to maintain spectrum efficiency.
Solution Approach 2:
The system enables self-service by pre-configuring multiple signal sequences at the terminal with clear identification of which sequence corresponds to which subcarrier spacing. The terminal can autonomously select and detect the appropriate sequence based on the network's indication without requiring complex real-time analysis or interaction.
Data Source
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AI summary
This application relates to the field of wireless communications technologies, and discloses a signal sending method. The method includes: mapping, onto a time frequency resource, a first signal that is in frequency domain and that corresponds to a subcarrier spacing parameter in a subcarrier spacing system parameter group, and generating a second signal that is in time domain and that corresponds to the first signal; and sending the second signal to a second network device. First signals corresponding to the different subcarrier spacing system parameters occupy a same quantity of subcarriers, and second signals corresponding to the different subcarrier spacing system parameters occupy a same time length T. In this way, when the second network device detects a specified signal in a signal sent by a first network device, impact of the quantity of subcarriers and the time domain length corresponding to the different subcarrier spacing system parameters may be ignored, thereby simplifying complexity of detecting the specified signal by the second network device, and improving communication efficiency of a wireless system.