TPMI List Signaling for Full-Power Uplink Transmission
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Solution Overview
Problem
Existing wireless communication systems face challenges in optimizing uplink transmission power levels, particularly in full power uplink transmission modes, leading to suboptimal communication quality and data transmission efficiency.
Innovation Solution
User equipment (UE) generates and transmits a transmit precoding matrix indicator (TPMI) list to a base station, allowing for full power uplink transmission by selecting appropriate TPMIs from a stored set, and receives downlink control information (DCI) to facilitate enhanced uplink data transmission on the physical uplink shared channel (PUSCH).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If traditional uplink transmission methods are used, then system compatibility is maintained, but uplink transmission power is suboptimal and communication quality deteriorates
Solution Approach 1:
The UE generates and transmits a TPMI list in advance to the BS before actual uplink data transmission. This preliminary action allows the BS to have pre-configured precoding options ready, enabling full power transmission without requiring real-time coordination, thus resolving the contradiction between maintaining system compatibility and achieving optimal transmission power.
Solution Approach 2:
The TPMI list acts as an intermediary mechanism between the UE and BS. It carries precoding matrix indicators that enable the BS to select appropriate precoders for full power uplink transmission while maintaining compatibility with existing system protocols. The intermediary TPMI list bridges the gap between traditional transmission methods and enhanced power transmission capabilities.
2Productivity
If full power uplink transmission is implemented, then data transmission efficiency is improved, but system complexity increases due to additional TPMI list management
Solution Approach 1:
The TPMI list serves multiple functions: it enables full power transmission, maintains system compatibility, and provides pre-configured precoding options for various transmission scenarios. By making the TPMI list multi-functional, the system achieves improved data transmission efficiency without proportionally increasing complexity, as the same structure serves multiple purposes.
Solution Approach 2:
The system changes the parameter set by introducing TPMI lists with specific precoding matrix indicators. These parameter changes enable full power transmission while the structured approach to managing these parameters (through standardized TPMI formats and BS selection protocols) prevents uncontrolled complexity growth.
3Power
If TPMI list is transmitted to base station, then full power transmission capability is enabled, but uplink control overhead increases
Solution Approach 1:
The patent extracts only the essential precoding information (TPMI indices) from the full precoding matrices and transmits these compact representations in the TPMI list. This extraction approach enables full power transmission capability while minimizing control overhead, as only the critical selector indices are transmitted rather than complete matrix data.
Solution Approach 2:
Instead of transmitting actual precoding matrices, the system uses TPMI indices as compact copies or references to the full precoding information stored at both UE and BS. This copying mechanism enables full power transmission capability while significantly reducing the quantity of control signals that need to be transmitted over the air interface.
Data Source
AI summary
A method for operating user equipment (UE) includes generating, by the UE, a transmit precoding matrix indicator (TPMI) list including one or more TPMIs selected from a set of available TPMIs stored at a base station (BS). Data indicative of the TPMI list is transmitted to the BS. An index of the TPMI list is transmitted to the BS. Downlink control information (DCI) is received from the BS including an indication of at least one TPMI from the TPMI list based on the index. Uplink data is transmitted to the BS on a physical uplink shared channel (PUSCH) using the at least one TPMI.