Uplink Data Transmission Power Control via TPMI Configuration
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Solution Overview
Problem
Current wireless communication systems face challenges in supporting explosive data traffic, high per-user data rates, increased device connectivity, low latency, and energy efficiency, particularly in next-generation mobile communication systems.
Innovation Solution
A method for transmitting uplink data in a wireless communication system involves a user equipment (UE) transmitting information about its capabilities to a base station, which configures a Transmit Precoding Matrix Indicator (TPMI) and determines transmission power based on the TPMI, using either full power or a scaled power value depending on the TPMI inclusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal transmits uplink data using full transmission power, then the data transmission rate and reliability are improved, but the energy consumption increases
Solution Approach 1:
The patent implements dynamic transmission power adjustment by configuring different TPMI values to indicate full power or scaled power transmission. The base station adapts the transmission power level based on channel conditions and terminal capability, allowing the system to switch between full power mode (for high data rate requirements) and scaled power mode (for energy efficiency), thus dynamically optimizing the trade-off between productivity and energy consumption.
2Adaptability or versatility
If the terminal supports multiple TPMI values, then the adaptability to different channel conditions is improved, but the device complexity increases
Solution Approach 1:
The patent applies local quality by configuring different TPMI values with specific properties - some indicating full power transmission and others indicating scaled power transmission. Each TPMI value is optimized for specific channel conditions or transmission scenarios. The base station selects the appropriate TPMI based on local channel characteristics, allowing the terminal to adapt its transmission parameters to match the specific requirements of each transmission instance without requiring complex processing capability in all terminals.
3Reliability
If the base station configures TPMI based on terminal capability information, then the transmission reliability is improved, but the signaling overhead increases
Solution Approach 1:
The patent implements preliminary action by having the terminal pre-report its capability information (supported TPMI values) to the base station before actual data transmission. The base station stores this capability information and uses it to quickly determine appropriate TPMI configurations for subsequent transmissions. This preliminary configuration reduces the need for repeated capability exchange signaling during data transmission, as the base station can directly select from the pre-reported capability set, thus improving reliability while minimizing ongoing signaling overhead.
Data Source
AI summary
Disclosed herein are a method and a device for transmitting and receiving uplink data in a wireless communication system. According to the present disclosure, a UE may transmit to a base station information related to a capability of the UE and the information may include a subset including at least one transmit precoding matrix indicator (TPMI) supported by the UE. The UE may receive Downlink Control Information (DCI) for transmitting the uplink data from the base station and the DCI may include a TPMI used for the UE to transmit the uplink data. Thereafter, the UE may transmit to the base station the uplink data by using transmission power determined based on the TPMI and the transmission power may be determined according to whether the TPMI is included in the at least one TPMI.