NR User Equipment MIMO Layer Switching Across Bandwidth Parts
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Solution Overview
Problem
In NR wireless communication systems, reducing power consumption is challenging when multiple input multiple output (MIMO) layers are configured, as it is difficult to reduce bandwidth effectively.
Innovation Solution
A user equipment is provided with a receiving unit to manage first and second numbers of MIMO layers, where the first number is for a default or initial BWP and the second for each cell, allowing the selection of appropriate MIMO layers based on the activated BWP type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of MIMO layers is increased to improve communication capacity and speed, then communication performance is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the number of MIMO layers adjustable rather than fixed. The user equipment dynamically switches between different numbers of MIMO layers (first number for default/initial BWP, second number for other BWPs) based on the activated BWP type, allowing adaptive optimization between power consumption and communication capacity depending on operational conditions
Solution Approach 2:
The patent changes the parameter of MIMO layer configuration based on BWP type. By configuring different numbers of MIMO layers for different BWP scenarios (first number for default/initial BWPs, second number for other BWPs), the system optimizes the balance between communication performance and power consumption according to actual operational needs
2Loss of energy
If the bandwidth part (BWP) mechanism is used to reduce bandwidth and power consumption, then power saving is improved, but communication efficiency deteriorates when multiple MIMO layers are configured
Solution Approach 1:
The patent applies local quality by tailoring the number of MIMO layers to specific BWP scenarios. Different numbers of MIMO layers are configured for different BWP types (first number for default/initial BWPs, second number for other BWPs), allowing optimal local optimization of communication efficiency and power saving for each specific operational context rather than using a uniform configuration
3Device complexity
If a fixed number of MIMO layers is configured for all BWPs, then device complexity is reduced, but communication efficiency cannot be optimized across different BWP states
Solution Approach 1:
The patent segments the BWP configuration into different categories (default BWP, initial BWP, and other BWPs) with different MIMO layer settings. This segmentation allows the system to maintain relatively simple configuration management while achieving optimized communication efficiency for each BWP state, as each segment has a predetermined appropriate number of MIMO layers
Data Source
AI summary
A user equipment includes a receiving unit configured to receive a first number of multiple input multiple output (MIMO) layers and a second number of MIMO layers from a base station device, a control unit configured to select the first number of MIMO layers or the second number of MIMO layers for an activated bandwidth part (BWP) based on a type of the activated BWP, and a communication unit configured to perform communication using the selected number of MIMO layers, in which the first number of MIMO layers is a number of MIMO layers configured for a default BWP or an initial BWP, and the second number of MIMO layers is a number of MIMO layers configured for each cell.