Information-Type Multiplexing Under 5G/NR Cell-Group Power Limits
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing transmission power control, scheduling requests, and uplink control information transmission, particularly in advanced communication systems like 5G/NR, to meet diverse application requirements such as high data rates, low latency, and massive connections.
Innovation Solution
A method and apparatus for determining and managing transmission power in a 5G/NR communication system by configuring power levels for different cell groups and computing total power based on maximum power constraints and power control formulas, enabling efficient transmission on multiple channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transmission power is increased to support higher data rates and connectivity, then data rate and connection density improve, but power consumption and interference increase
Solution Approach 1:
The patent implements dynamic power control where the UE adjusts transmission power based on real-time conditions including pathloss, channel quality, and buffer status. The power control formula dynamically computes transmit power as a function of these variables, allowing the system to achieve high data rates when needed while reducing power consumption during normal operation.
Solution Approach 2:
The patent changes multiple parameters simultaneously to optimize the power-rate tradeoff: it adjusts transmit power levels, selects appropriate modulation and coding schemes (MCS), and modifies resource allocation based on channel conditions. This multi-parameter optimization enables the system to achieve peak data rates of 20 Gb/s while managing power consumption through adaptive parameter adjustment.
2Loss of time
If transmission power is increased to reduce latency, then latency improves, but power consumption increases
Solution Approach 1:
The patent implements dynamic power control where the UE adjusts transmission power based on real-time conditions including pathloss, channel quality, and buffer status. The power control formula dynamically computes transmit power as a function of these variables, allowing the system to achieve high data rates when needed while reducing power consumption during normal operation.
Solution Approach 2:
The patent uses buffer status reporting and channel quality indication to predict upcoming transmission needs. By preparing power control parameters and resource allocations in advance based on buffered data status, the system can quickly transmit data when needed without excessive power consumption, thereby reducing latency while managing energy use.
3Adaptability or versatility
If multiple cell groups are configured for transmissions, then connectivity and capacity improve, but power management complexity increases
Solution Approach 1:
The patent divides the cell groups into two distinct categories: cell group 1 (CG1) containing a primary cell (PCell), and cell group 2 (CG2) containing secondary cells (SCells). Each cell group has separate power control parameters (PCMAX,max1 and PCMAX,max2) and independent power control formulas. This segmentation simplifies power management by treating each cell group independently while still supporting multi-cell connectivity.
Solution Approach 2:
The patent creates a universal power control framework that handles both single-cell and multi-cell scenarios through the same mechanism. The power control formulas and procedures work uniformly across CG1 and CG2, and can be applied whether the UE is transmitting on one cell or multiple cells simultaneously. This multi-functional approach simplifies implementation while supporting diverse connectivity scenarios.
Data Source
AI summary
A method for a user equipment (UE) determined a total power for transmissions in a cell group (CG) or a power for transmission of a channel or signal in a cell of a CG. The method comprises receiving configuration information for first and second CGs and for first and second maximum total powers for transmissions in the first and second CGs and determining first and second total powers for transmissions in the first and second CGs, respectively. The method also comprises receiving configuration information for a set of values for one or more parameters used to determine a power for transmission of a channel or signal in a cell of a CG and an indication for a value for each parameter from the one or more parameters.