UE Power Reduction Factor Calculation for Dual Connectivity
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Solution Overview
Problem
Conventional wireless communication systems in dual connectivity (DC) modes lack efficient power management mechanisms, particularly in scenarios involving time division multiplexing (TDM) and frequency division multiplexing (FDM), where dynamic power sharing across different radio access technologies (RATs) is not fully supported, leading to inefficient power utilization and limited downlink resource utilization.
Innovation Solution
A user equipment (UE) is configured to calculate and manage power reduction factors for uplink communications between master cell groups (MCG) and secondary cell groups (SCG) associated with different RATs, allowing for power sharing and reduction operations, including maximum power reduction (MPR) and advanced MPR (A-MPR), to optimize power usage based on overlapping communications and UE capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE performs uplink communications with both MCG and SCG simultaneously, then the data transmission capacity is improved, but the power consumption increases and power management becomes complex
Solution Approach 1:
The patent implements dynamic power sharing between MCG and SCG by calculating power reduction factors based on overlapping uplink communications. The UE dynamically adjusts transmit power for SCG depending on the power headroom available after MCG transmission, enabling adaptive power management that optimizes data transmission while controlling power consumption.
Solution Approach 2:
The patent changes the power transmission parameter by introducing power reduction factors (MPR and A-MPR) that modify the nominal transmit power. These parameters are calculated based on UE capabilities, overlapping communications, and power sharing configurations, allowing the system to operate at optimized power levels rather than fixed maximum power.
2Use of energy by moving object
If the UE performs power reduction for SCG uplink communications, then the power consumption is reduced, but the data transmission capacity decreases
Solution Approach 1:
The patent applies partial power reduction rather than complete power shutdown for SCG communications. By calculating appropriate power reduction factors (partial action), the system reduces power consumption while maintaining sufficient transmit power to preserve data transmission capacity, avoiding the extreme of completely dropping SCG communications.
3Adaptability or versatility
If the UE supports multiple RATs (LTE and NR) in dual connectivity, then the network compatibility and service coverage are improved, but the device complexity and power management difficulty increase
Solution Approach 1:
The patent segments the power management process into distinct steps: calculating MCG transmit power, determining power headroom, calculating power reduction factors for SCG, and selectively applying MPR/A-MPR. This segmentation of the power control function reduces device complexity by breaking down the complex multi-RAT power management into manageable, standardized operations.
Solution Approach 2:
The patent creates a universal power sharing mechanism that works across different RATs (LTE and NR). The power reduction factor calculation and MPR/A-MPR application provide a multi-functional framework that handles power management for both RATs uniformly, reducing the need for RAT-specific power control logic and thereby reducing device complexity.
4Productivity
If the UE calculates power reduction factors dynamically, then the power management efficiency is improved, but the computational complexity and processing time increase
Solution Approach 1:
The patent performs preliminary calculation of power reduction factors before actual uplink transmission. By pre-calculating MPR and A-MPR values based on UE capabilities and expected overlapping communications, the system prepares power management parameters in advance, reducing real-time computational complexity during actual transmission while maintaining efficient power management.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may determine that uplink communications are to be performed between the UE and a first cell group associated with a first radio access technology (RAT) and between the UE and a second cell group associated with a second RAT. The UE may determine that the UE is configured for power sharing for the uplink communications with the first cell group associated with the first RAT and the second cell group associated with the second RAT. The UE may calculate, based on the power sharing and the uplink communications, a power reduction factor for the uplink communications between the UE and the second cell group. The UE may perform the uplink communications with the first cell group and selectively perform the uplink communications with the second cell group.