Beam-Based MIMO Channel Creation for MU-MIMO Network Testing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing network test devices face challenges in efficiently creating optimal propagation channels for MU-MIMO systems due to complex signal interference and noise, leading to degraded system performance during testing.
Innovation Solution
A network test device uses an open-loop optimization approach based on gNodeB beam patterns to create directional MIMO channels, employing algorithms that maximize Signal-to-Interference-Plus-Noise Ratio (SINR) and minimize interference, thereby improving system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional network test devices create propagation channels without using beam pattern information, then the channel creation process is simpler, but the system performance degrades due to complex signal interference and noise
Solution Approach 1:
The patent applies preliminary action by pre-identifying beam patterns from the gNodeB before creating propagation channels. The beam pattern information is obtained in advance and stored, then used during channel creation to determine optimal UE positions and layer configurations. This preliminary preparation eliminates the need for complex real-time interference calculations during testing, thereby improving system performance while managing complexity.
2Productivity
If optimal UE positions are identified through complex algorithms, then the throughput and performance of MU-MIMO systems improve, but the computational complexity and time required increase
Solution Approach 1:
The patent applies copying by creating simplified propagation channel models that replicate the essential characteristics of real wireless channels based on beam pattern data. Instead of performing complex real-time optimization algorithms during testing, the system pre-computes optimal UE positions and layer configurations based on beam patterns, then copies these optimized configurations for rapid testing. This approach maintains high throughput performance while significantly reducing computational time and complexity during actual testing operations.
3Measurement precision
If beam pattern information is used to create directional MIMO channels, then interference is minimized and SINR is maximized, but the device complexity increases due to additional processing requirements
Solution Approach 1:
The patent applies extraction by isolating and utilizing only the essential beam pattern information from the gNodeB that is necessary for creating optimized propagation channels. Instead of processing complete channel state information or performing full MIMO matrix calculations, the system extracts key beam direction and shape parameters, then uses these extracted features to determine optimal UE positions and layer assignments. This selective extraction achieves high SINR and interference minimization while keeping processing complexity manageable.
Data Source
AI summary
In some implementations, a network test device may identify a beam pattern associated with a gNodeB. The network test device may select, from the beam pattern, a first location, wherein the first location is associated with a first layer of a user equipment (UE). The network test device may select, based on the beam pattern, a second location associated with a second layer of the UE, wherein the second location is selected from a set of candidate locations associated with the first layer. The network test device may create one or more multiple-input multiple-output (MIMO) channels based on selected layers. The network test device may use the one or more MIMO channels to test a multiple user MIMO (MU-MIMO) system in a simulation or emulation environment.