Terminal Waveform Switching Assistance for Uplink Power Control
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Solution Overview
Problem
Existing technologies fail to achieve dynamic waveform switching due to reliance on power headroom reports, leading to inefficient uplink transmission resource and power utilization in user equipment.
Innovation Solution
A method and apparatus that enable a terminal to send assistance information related to waveform switching, including power headroom, delta information, and maximum permissible exposure, allowing a network-side device to control waveform switching for improved uplink transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the network relies solely on power headroom report for waveform switching, then the signaling overhead is reduced, but the uplink transmission resource and power utilization cannot be maximized
Solution Approach 1:
The assistance information is segmented into multiple fields including power headroom field, maximum transmit power field, and MPE field. Each field carries specific parameters needed for waveform switching decisions, allowing the network to comprehensively evaluate different waveforms without excessive signaling overhead.
Solution Approach 2:
The patent adds a new dimension to the power headroom report by including not only power headroom values but also maximum transmit power and MPE information. This multi-dimensional information enables the network to make more accurate waveform switching decisions while keeping signaling efficient.
2Device complexity
If the network relies solely on power headroom report for waveform switching, then the signaling complexity is reduced, but the power control capability is insufficient
Solution Approach 1:
The terminal pre-calculates and reports multiple parameters including power headroom, maximum transmit power, and MPE for different waveforms before the network makes scheduling decisions. This preliminary action provides the network with comprehensive power-related information needed for effective power control and waveform switching.
Solution Approach 2:
The assistance information acts as feedback from the terminal to the network, providing real-time power status including power headroom, maximum transmit power, and MPE. This feedback loop enables the network to dynamically adjust uplink power allocation and waveform selection to maximize power utilization.
3Stability of the object's composition
If RRC reconfiguration is used for waveform updates, then the waveform configuration is stable, but the update rate is slow
Solution Approach 1:
The patent enables dynamic waveform switching by allowing the terminal to report assistance information that includes power headroom and MPE for multiple waveforms. The network can then dynamically select the appropriate waveform based on current channel conditions and power status, switching waveforms rapidly without RRC reconfiguration.
Solution Approach 2:
The assistance information serves as an intermediary mechanism between RRC configuration and physical layer waveform selection. It carries power-related parameters that enable the network to make rapid waveform decisions based on current conditions while maintaining the stability of RRC configurations.
Data Source
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AI summary
This application discloses an information transmission method and apparatus, a terminal, and a network-side device, pertaining to the field of communication technologies. The method of embodiments of this application 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; where the first waveform is a waveform other than a second waveform; and the second waveform is a waveform actually used for physical uplink channel transmission of the terminal.