PTRS Port-Based Power Control in Non-Codebook Uplink
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Solution Overview
Problem
Existing wireless communication systems, particularly in 5G and NR, face challenges in effectively boosting the power of phase tracking reference signals (PTRS) during non-codebook-based uplink transmissions, as the base station lacks information on how precoding is performed by the user equipment, leading to uncertainties in power constraints and inefficient power management.
Innovation Solution
A method and apparatus for determining and managing the power of phase tracking reference signals (PTRS) based on the number of ports, allowing power boosting through mechanisms such as borrowing power from other layers and adjusting power levels independently at the user equipment (UE) to ensure effective transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If power boosting is applied to PTRS in non-codebook-based transmission, then phase tracking accuracy is improved, but power management complexity increases due to lack of base station information on UE precoding
Solution Approach 1:
The user equipment autonomously determines and adjusts the power of phase tracking reference signals based on the number of ports configured for uplink transmission, without requiring base station intervention or feedback. This self-service mechanism resolves the power management complexity by enabling the UE to independently optimize PTRS power boosting while maintaining phase tracking accuracy.
2Reliability
If PTRS power is increased to improve phase tracking, then communication reliability is improved, but power allocation efficiency decreases due to uncertainty in power constraints
Solution Approach 1:
The patent changes the parameter used for power determination from base station-controlled values to UE-determined values based on the number of ports. This parameter change enables reliable phase tracking through appropriate power boosting while improving power allocation efficiency by eliminating the uncertainty associated with base station lack of information on UE precoding operations.
3Reliability
If power boosting is implemented for PTRS, then transmission quality is improved, but system complexity increases due to additional power determination mechanisms
Solution Approach 1:
The user equipment autonomously determines and adjusts the power of phase tracking reference signals based on the number of ports configured for uplink transmission, without requiring base station intervention or feedback. This self-service mechanism resolves the power management complexity by enabling the UE to independently optimize PTRS power boosting while maintaining phase tracking accuracy.
Data Source
AI summary
The disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). According to an embodiment of the disclosure, a method for operating a user equipment (UE) in a wireless communication system includes determining power of at least one phase tracking reference signal (PT-RS), and transmitting the at least one PT-RS according to non-codebook based transmission. Herein, the power is determined based on a number of at least one port for the at least one PT-RS.