Dynamic Uplink Waveform Switching Without RRC Reconfiguration
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Solution Overview
Problem
Existing communication technologies lack the ability to dynamically switch between different waveforms for uplink transmission, leading to slow update rates and suboptimal transmission performance due to reliance on RRC reconfiguration.
Innovation Solution
A terminal sends terminal assistance information related to waveform switching, including power headroom, delta information, and maximum permissible exposure, enabling the network-side device to control dynamic waveform switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If waveform configuration is updated through RRC reconfiguration, then transmission performance can be optimized, but the update rate becomes slow and cannot effectively improve transmission performance in real-time
Solution Approach 1:
The patent introduces dynamic waveform switching capability that allows the terminal to switch between different waveforms (e.g., CP-OFDM and DFT-s-OFDM) based on real-time channel conditions. This dynamic mechanism enables the system to adapt waveform configuration without requiring slow RRC reconfiguration procedures, thus resolving the contradiction between transmission performance optimization and update rate.
Solution Approach 2:
The patent enables changes in waveform parameters (such as selecting different waveform types, adjusting power headroom reporting, modifying maximum permissible exposure) to optimize transmission performance. By allowing these parameter changes to occur dynamically rather than through lengthy reconfiguration procedures, the system achieves both improved transmission performance and faster update rates.
2Reliability
If dynamic waveform switching is enabled, then transmission performance improves through proper scheduling and power control, but the system complexity increases due to additional information transmission requirements
Solution Approach 1:
The patent extracts essential waveform-related information (such as power headroom, maximum permissible exposure, and waveform type) and transmits only these critical parameters between the terminal and network. By extracting and transmitting only the necessary information rather than all possible configuration details, the system achieves dynamic waveform switching capability while minimizing the increase in system complexity.
Solution Approach 2:
The patent implements feedback mechanisms where the terminal reports waveform-related information (power headroom, MPE values) to the network, and the network uses this feedback to make informed waveform switching decisions. This feedback loop enables proper scheduling and power control to optimize transmission performance while maintaining manageable system complexity through structured information exchange.
Data Source
AI summary
This application discloses an information transmission method and apparatus, a terminal, and a network-side device. The method includes: sending, by a terminal, terminal assistance information related to waveform switching; and performing, by the terminal, the waveform switching; where the terminal assistance information includes at least one of the following: first information related to a first power headroom corresponding to a first waveform; first delta information, where the first delta information is used to indicate a delta of first parameters corresponding to different waveforms; second delta information, where the second delta information is used to indicate a delta of first parameters corresponding to different modulation schemes of a same waveform; a maximum transmit power of the terminal corresponding to the first waveform; information related to a second parameter; and second information related to a maximum permissible exposure MPE corresponding to the first waveform.