UE Capability Signaling for Full-Power 5G Uplink Precoding
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately estimating and efficiently utilizing the uplink channel conditions between user equipment and base stations, particularly in advanced 5G systems, which affects the selection of appropriate communication parameters for effective data transmission.
Innovation Solution
A user equipment (UE) is equipped with the capability to transmit full power precoding matrix indicators (TPMIs) to a base station (BS), allowing the BS to configure and receive physical uplink shared channel (PUSCH) transmissions at full power, enabling accurate UL channel measurement and parameter selection for efficient communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE transmits reference signals for UL channel measurement, then the gNB can select appropriate communication parameters, but the transmission power may be limited and not fully utilized
Solution Approach 1:
The patent changes the power transmission parameter by introducing full power transmission capability signaling. The UE indicates its full power transmission capability and the gNB configures TPMI (Transmit Precoding Matrix Indicator) to enable the UE to transmit reference signals and data at full power, thereby resolving the contradiction between reliable channel measurement and effective power utilization
2Productivity
If the gNB selects communication parameters based on UL channel measurement, then data transmission efficiency is improved, but the system complexity increases due to capability signaling and configuration
Solution Approach 1:
The patent applies preliminary action by having the UE pre-signal its full power transmission capability before actual data transmission. The capability signaling is performed in advance, allowing the gNB to configure appropriate TPMI and power settings beforehand, thus enabling efficient data transmission without adding complex real-time decision-making requirements
Solution Approach 2:
The system dynamically adapts to UE capabilities through capability signaling. The gNB receives the full power transmission capability indication and dynamically configures TPMI and power settings accordingly, allowing the system to optimize performance based on actual UE capabilities without requiring complex static configurations
Data Source
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AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method for operating a user equipment (UE) is provided. The method comprises transmitting, to a base station (BS), UE capability information including a full power transmission capability of the UE, wherein the full power transmission capability of the UE includes a parameter S to indicate a group of full power transmit precoding matrix indicators (TPMIs); receiving, from the BS, configuration information for a physical uplink shared channel (PUSCH) transmission, wherein the configuration information includes a TPMI; determining the PUSCH transmission; determining a power level for the PUSCH transmission; and transmitting, to the BS, the PUSCH transmission with the determined power level, wherein the power level corresponds to full power based on the TPMI being included in the group of full power TPMIs, and wherein the TPMI indicates a precoding matrix and a number of layers for the PUSCH transmission.