Dual Connectivity Transmit Power Configuration for LTE and NR Interference
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Solution Overview
Problem
In wireless communication systems, determining configured maximum transmit power values for dual connectivity scenarios involving different radio access technologies like LTE and NR is challenging, especially when UE operations across multiple component carriers and serving cells, and existing mechanisms fail to account for implementation complexity and interference reduction.
Innovation Solution
A method and device configuration to determine separate configured maximum transmit power values for LTE and NR transmissions, considering resource blocks, power reductions, and backoff values, allowing independent operation of LTE hardware/software without considering NR settings and enabling NR to account for LTE transmissions to reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single configured maximum transmit power value is used for both LTE and NR transmissions, then the power management is simplified, but interference between different RATs cannot be effectively reduced and implementation complexity increases
Solution Approach 1:
The patent divides the power management into separate configured maximum transmit power values for LTE (Pcmax,LTE) and NR (Pcmax,NR) transmissions. This segmentation allows independent power control for each RAT, enabling the LTE hardware/software to operate independently without considering NR settings, while NR can account for LTE transmissions to reduce interference.
Solution Approach 2:
The patent applies different power management characteristics to different RATs. LTE power management is simplified with independent operation, while NR power management is optimized to account for LTE transmissions. This local differentiation resolves the contradiction by tailoring the power management approach to the specific requirements of each RAT.
2Ease of manufacture
If LTE hardware/software operates independently without considering NR settings, then implementation is simplified, but power coordination between RATs deteriorates
Solution Approach 1:
The patent segments the power management functionality so that LTE hardware/software operates independently with its own configured maximum transmit power value (Pcmax,LTE), while NR has separate power management (Pcmax,NR) that can independently account for LTE transmissions. This segmentation achieves both independent operation for simplicity and coordinated power management for reliability.
3Adaptability or versatility
If separate configured maximum transmit power values are determined for LTE and NR, then interference reduction is enabled and implementation flexibility improves, but the determination complexity increases
Solution Approach 1:
The patent determines the configured maximum transmit power values (Pcmax,LTE and Pcmax,NR) in advance based on power reductions and backoff values. This preliminary determination simplifies the ongoing power management by establishing bounds before transmissions occur, reducing the complexity of real-time power coordination while maintaining flexibility.
Data Source
AI summary
A method is performed by a wireless device. The method comprises determining a first configured maximum transmit power value (P_cmax1) for transmitting in a first radio access technology (RAT). The P_cmax1 is determined based on one or more transmissions of the first RAT. The method further comprises determining a second configured maximum transmit power value (P_cmax2) for transmitting in a second RAT. The P_cmax2 is determined based on transmissions of both the first RAT and the second RAT. The method further comprises performing a transmission in the first RAT at a power less than or equal to the P_cmax1. The method further comprises performing a transmission in the second RAT at a power less than or equal to the P_cmax2.