Uplink Waveform Selection for 5G NR Terminals
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Solution Overview
Problem
In the context of 5G New Radio (NR) mobile communication systems, there is a lack of a determined solution for consistently selecting the appropriate uplink waveform between Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) and Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM, which affects network communication reliability.
Innovation Solution
The proposed solution involves an uplink waveform acquisition method that determines the appropriate waveform for a terminal based on predetermined conditions in communication protocols, including frequency bands, service types, link types, and feedback information from the network side, ensuring consistent waveform selection between CP-OFDM and DFT-s-OFDM.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal supports both CP-OFDM and DFT-s-OFDM waveforms, then the adaptability of the terminal is improved, but the complexity of waveform selection and consensus achievement between network side and terminal increases
Solution Approach 1:
The patent applies parameter changes by establishing a correspondence between uplink waveforms and preset conditions (frequency bands, service types, link types). The terminal determines the appropriate waveform by changing parameters such as frequency band (licensed/unlicensed), service type (eMBB, mMTC, uRLLC), and link type (sidelink, uplink), rather than manually selecting between multiple waveform options. This reduces the complexity of waveform selection while maintaining adaptability across different scenarios.
2Reliability
If the network side determines the uplink waveform through feedback, then the reliability of waveform selection is improved, but the communication overhead and time delay increase
Solution Approach 1:
The patent applies preliminary action by pre-establishing the correspondence between uplink waveforms and preset conditions in communication protocols before actual communication occurs. The terminal can independently determine the waveform by matching current conditions (frequency band, service type, link type) against these predetermined rules, eliminating the need for real-time network feedback. This reduces time delay while maintaining reliability through protocol-standardized decision criteria.
3Productivity
If the terminal autonomously determines the waveform based on preset conditions, then the communication efficiency is improved, but the consistency of waveform selection between terminal and network side may be compromised
Solution Approach 1:
The patent applies universality by creating a universal correspondence rule that works across all scenarios and is standardized in communication protocols. Both the terminal and network side use the same universal criteria (frequency band, service type, link type correspondences) to determine waveforms, ensuring consistency. The terminal's autonomous determination based on these universal rules guarantees that both parties arrive at the same waveform selection without requiring additional coordination.
Data Source
AI summary
An uplink waveform acquisition method, an uplink waveform feedback method, a terminal, and a base station are provided. The acquisition method includes: acquiring an uplink waveform for information transmission of a terminal; and performing information transmission according to the uplink waveform, wherein, the acquiring the uplink waveform, includes: determining the uplink waveform for current information transmission of the terminal, according to correspondence between uplink waveforms and preset conditions in communication protocols; or receiving information about the uplink waveform for information transmission of the terminal, the information about the uplink waveform being determined for the terminal and transmitted through a preset message by a network side; or receiving information about the uplink waveform for information transmission of the terminal, the information about the uplink waveform being fed back to the terminal by the network side according to reporting information from the terminal.