NR Uplink Waveform Control for Shared-Channel Adaptability
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Solution Overview
Problem
In the context of NR, the flexible management of suitable signal waveforms is necessary to support various use cases, as the transmission signal and channel configuration are expanded compared to LTE, requiring improved transmission efficiency in communication systems.
Innovation Solution
A terminal device and base station device are configured to transmit and receive uplink channels using either a multicarrier or single carrier signal waveform based on control information notified by the base station, allowing for flexible adaptation to different use cases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple signal waveforms are supported in NR to handle various use cases, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic waveform selection where the terminal device can switch between different signal waveforms (CP-OFDM, DFT-s-OFDM, transform precoded OFDM) based on real-time control information from the base station. This dynamic adaptation allows the system to optimize performance for different use cases (eMBB, mMTC, URLLC) while maintaining manageable complexity through centralized control signaling rather than requiring all waveform capabilities to be permanently configured in the device.
2Adaptability or versatility
If signal waveform control is expanded to support various use cases, then adaptability is improved, but control complexity increases
Solution Approach 1:
The patent employs a universal control mechanism where a single control information message from the base station can direct the terminal to use different signal waveforms and channel configurations for various use cases. This multi-functional control approach allows one control system to handle eMBB, mMTC, and URLLC scenarios without requiring separate control mechanisms for each use case, thereby improving adaptability while limiting the growth of control complexity.
Data Source
AI summary
A terminal device that performs communication with a base station, including:a wireless transmitter that transmits an uplink channel using a first signal waveform or a second signal waveform,the first signal waveform is a signal generated without performing a predetermined conversion process, and the second signal waveform is a signal generated by performing the predetermined conversion process,in a case where the uplink channel is a predetermined control channel, the second signal waveform is used for transmitting the uplink channel, andin a case where the uplink channel is a predetermined shared channel, either the first signal waveform or the second signal waveform is used for transmitting the uplink channel based on control information uniquely notified from the base station to the terminal device.