PTRS Port Transmit Power Determination for Multi-Panel Uplink
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Solution Overview
Problem
In scenarios where multiple antenna panels are used for simultaneous uplink transmission in 5G communication systems, determining independent power boosting values for phase tracking reference signal (PTRS) ports is challenging, leading to potential performance issues due to differing transmit powers of OFDM symbols across panels.
Innovation Solution
A method for determining transmit power in terminal devices involves receiving indication information associated with different transmission layers of a physical uplink shared channel (PUSCH), using this information to calculate power boosting values for PTRS ports based on the number of target transmission layers, and adjusting transmit power accordingly to ensure balanced power distribution across panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If independent power boosting values are determined for each PTRS port in multi-panel transmission, then uplink transmission performance is improved, but device complexity increases
Solution Approach 1:
The patent segments the power boosting determination into separate independent calculations for each PTRS port based on their associated transmission layers. Each PTRS port's power boosting value is determined independently using its specific target transmission layer count, allowing precise power control per panel while maintaining manageable complexity through modular calculation.
Solution Approach 2:
The patent applies local quality by allowing different PTRS ports to have different power boosting values based on their local conditions (number of associated transmission layers). This enables each panel/PTRS port to have optimized power characteristics tailored to its specific transmission requirements rather than using a uniform power approach.
2Stability of the object's composition
If power boosting values are determined based on number of transmission layers, then power balance across panels is improved, but calculation complexity increases
Solution Approach 1:
The patent uses parameter changes by making the power boosting value a function of the number of transmission layers associated with each PTRS port. This dynamic parameter adjustment allows the system to automatically balance power across panels based on their respective transmission layer counts, achieving power stability through adaptive parameter modification rather than fixed values.
3Measurement precision
If multiple indication information are used for different transmission layers, then transmission precision is improved, but information processing complexity increases
Solution Approach 1:
The patent segments the indication information processing by associating each PTRS port with specific transmission layers through separate indication information (SRI or TCI). This segmentation allows precise tracking of which indication information corresponds to which transmission layers and PTRS ports, improving precision while managing complexity through structured one-to-one or many-to-one mappings.
Data Source
AI summary
A method for determining a transmit power includes: receiving, by a terminal device, a first message, where the first message includes a plurality of indication information associated with different transmission layers of a physical uplink shared channel (PUSCH), transmission layers associated with different indication information correspond to different PTRS ports, and the indication information is sounding reference signal resource indicator (SRI) information or transmission configuration indicator (TCI) state information; determining, by the terminal device, a power boosting value of each PTRS port based on a number of target transmission layer(s), where the target transmission layers are any one of: transmission layer(s) associated with a respective one of the plurality of indication information, transmission layer(s) corresponding to the PTRS port, and all transmission layers of the PUSCH; and determining, by the terminal device, a transmit power of the PTRS port based on the power boosting value of the PTRS port.