Guard Tone Frequency Separation for 5G Numerology Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The flexibility of 5G communication systems is reduced due to mutual interference between data transmission processes using different numerologies, which limits the system's performance when these numerologies are multiplexed.
Innovation Solution
The implementation of a guard tone between frequency bands used for data transmissions based on different numerologies to prevent interference, along with configuring appropriate filtering modes for data processing, ensures that data is transmitted only in designated frequency bands, thereby isolating and separating the frequency domains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different numerologies are multiplexed in the same carrier using frequency division multiplexing, then the flexibility of the 5G communication system is improved, but mutual interference between data transmission processes based on different numerologies occurs
Solution Approach 1:
The frequency band is segmented into multiple sub-bands, with each sub-band dedicated to a specific numerology. This segmentation prevents different numerologies from overlapping in frequency, thereby eliminating mutual interference while maintaining the flexibility to support multiple numerologies simultaneously in the same carrier.
Solution Approach 2:
Different frequency sub-bands are assigned different numerology characteristics (subcarrier spacing, cyclic prefix length) according to local requirements. This allows each sub-band to be optimized for its specific numerology without affecting other sub-bands, resolving the interference issue while preserving adaptability.
2Object-affected harmful factors
If data transmissions based on different numerologies are performed in different frequency bands, then mutual interference is avoided, but the flexibility of the 5G communication system is reduced
Solution Approach 1:
The system is designed to support multiple numerologies within a single carrier by dividing the frequency band into sub-bands. Each sub-band can independently support different numerologies, making the carrier universal and adaptable to various service requirements while avoiding interference through frequency separation within the same carrier structure.
Solution Approach 2:
Instead of separating different numerologies across different carriers (spatial separation), the invention uses frequency division within the same carrier (frequency dimension separation). This dimensional approach allows multiple numerologies to coexist in one carrier without interference, maintaining flexibility while solving the interference problem.
3Object-affected harmful factors
If guard tones are inserted between frequency bands for different numerologies, then mutual interference is prevented, but device complexity increases
Solution Approach 1:
Guard tones are extracted and inserted as separate elements between the frequency sub-bands allocated to different numerologies. This explicit separation ensures that spectral leakage and mutual interference between different numerologies are prevented, while the guard tones themselves are simple sinusoidal signals that do not add significant processing complexity.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention discloses a method, network device and terminal device for transmitting data. The method includes: a network device determines a numerology for transmitting data, and determines a target frequency band for transmitting the data, the target frequency band including a transmission frequency band for transmitting the data and a guard tone; the network device sends configuration information to the terminal device, the configuration information including the numerology and information of the target frequency band; the network device receives the data sent by the terminal device or sends the data to the terminal device on the transmission frequency band according to the numerology. Therefore, the method, the network device and the terminal device of the present invention avoid mutual interference between data transmissions based on different numerologies by setting guard tones in the transmission resources.