Eight-Antenna Uplink Power Control Through TPMI and Port-Group Reporting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently performing wireless signal transmission and reception procedures.
Innovation Solution
A method and apparatus for transmitting and receiving signals in a wireless communication system that involves transmitting UE capability information related to eight transmission antenna ports, receiving downlink control information for uplink scheduling, and determining transmission power based on the reported antenna port group and the TPMI obtained through DCI, with options for full power transmission or scaled power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the UE transmits capability information for all eight antenna ports, then the system can support full power transmission, but the signaling overhead and complexity increase
Solution Approach 1:
The eight antenna ports are divided into two groups (first antenna port group and second antenna port group). The UE reports capability information for one group at a time, reducing the signaling overhead while still enabling full power transmission capability indication for the entire system.
Solution Approach 2:
The UE reports capability information for only one antenna port group (either first or second) rather than all eight antenna ports. This partial reporting is sufficient to enable the system to determine full power transmission capability when combined with TPMI information.
2Power
If the system uses power scaling for all TPMI values, then the transmission is simpler to manage, but the transmission power and efficiency are reduced
Solution Approach 1:
The power scaling factor is dynamically adjusted based on the TPMI value and the reported antenna port group capability. When the TPMI corresponds to the reported group, the scaling factor is set to 1 (full power). When it corresponds to the other group, a scaling factor less than 1 is applied. This dynamic adjustment enables full power transmission when conditions permit while maintaining manageable complexity.
Solution Approach 2:
The power scaling parameter is changed based on the relationship between the TPMI and the reported antenna port group. The system transitions between two states: full power (scaling factor = 1) when TPMI matches the reported group, and scaled power (scaling factor < 1) when it doesn't match. This parameter change optimizes transmission power efficiency.
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
A method for a terminal to transmit signals in a wireless communication system according to at least one of the embodiments disclosed herein comprises: transmitting terminal capability information related to 8 transmission antenna ports of the terminal; receiving downlink control information (DCI) for uplink scheduling including information about a transmission precoding index (TPMI); and transmitting an uplink signal on the basis of the DCI. The terminal capability information may include information for reporting an antenna port group supporting full power transmission among a plurality of antenna port groups composed on the basis of the 8 transmission antenna ports, and the transmission power of the uplink signal may be determined on the basis of whether the TPMI acquired through the DCI is related to the reported antenna port group.