Uplink Transmission Layer Assignment in Wireless Networks
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Solution Overview
Problem
In heterogeneous wireless networks, particularly those using dual-connectivity technologies like EN-DC, uplink performance is hindered by factors such as transmission type, distance from access nodes, and frequency usage, especially when dealing with diverse radio access technologies and frequency bands.
Innovation Solution
A method for selectively assigning uplink transmission layers based on usage thresholds and signal conditions, where wireless devices are instructed to add or adjust orthogonal layers for uplink transmissions using antennae, with frequency adjustments and noise monitoring to optimize power and quality of service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple orthogonal transmission layers are used for uplink MIMO transmissions, then uplink throughput is improved, but uplink performance deteriorates due to interference and noise accumulation
Solution Approach 1:
The patent dynamically adjusts the number of uplink transmission layers based on real-time channel conditions, wireless device capabilities, and network load. The base station monitors channel quality indicators and selectively activates or deactivates transmission layers to optimize throughput while maintaining performance thresholds, transforming the static layer configuration into a dynamic adaptive system.
Solution Approach 2:
The patent changes key parameters including the number of active transmission layers, modulation and coding schemes (MCS), and resource allocation patterns based on channel conditions. By adjusting these parameters adaptively, the system achieves high throughput when conditions permit while maintaining reliable communication when channel quality degrades.
2Area of stationary object
If wireless devices transmit uplink data using higher transmit powers, then uplink coverage is improved, but power consumption increases and interference to other users increases
Solution Approach 1:
The patent applies local quality by assigning different transmit power levels and transmission layer configurations to different wireless devices based on their specific channel conditions, distances from the base station, and service requirements. Instead of uniform high power transmission, each device receives optimized power allocation tailored to its local channel characteristics, improving coverage for distant devices while conserving power for devices with good channel conditions.
Solution Approach 2:
The patent uses partial action by activating only the necessary number of transmission layers and assigning appropriate power levels based on actual channel conditions rather than always using maximum power or all available layers. This selective activation ensures sufficient coverage while avoiding excessive power consumption and inter-user interference.
3Productivity
If massive MIMO with hundreds of antennae is deployed, then uplink throughput is improved, but system complexity increases
Solution Approach 1:
The patent segments the large-scale antenna array into multiple groups or subsets, each handling specific spatial streams or user equipment. This segmentation simplifies the processing complexity by dividing the massive MIMO problem into smaller, more manageable sub-problems while still leveraging the benefits of having many antennae for high throughput.
Solution Approach 2:
The patent designs the massive MIMO system with universal beamforming capabilities that can serve multiple users simultaneously across different spatial layers. The same antenna array and processing architecture handle both uplink and downlink transmissions, as well as multiple service types, reducing overall system complexity through multi-functionality.
Data Source
AI summary
Selectively assigning uplink transmission layers for uplink transmissions from wireless devices to access nodes based on any combination of uplink usage characteristics and signal conditions. Wireless devices configured to transmit uplink data on one or more orthogonal transmission layers from each antenna. Instructing wireless devices to add transmission layers is based on an uplink usage and other characteristics such as type of transmission, time of day, distance from serving access node, etc.