Beam-Pattern MIMO Channel Creation for MU-MIMO Testing

Solution Overview

Problem

Existing network test devices face challenges in efficiently creating optimal propagation channels for MU-MIMO systems due to complex interference and noise, leading to degraded system performance during testing.

Innovation Solution

A network test device utilizes gNodeB beam patterns to create MIMO channels using an open-loop optimization approach, employing algorithms that maximize signal-to-interference-plus-noise ratio (SINR) and minimize interference, thereby establishing directional channels for effective MU-MIMO system testing.

Engineering Contradictions & Design Principles

VSEngineering 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 is degraded due to complex interference and noise

Engineering Contradiction:

Improvesystem performanceVSAvoidchannel creation complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-obtaining beam pattern information from the gNodeB before creating MIMO propagation channels. This advance preparation allows the test device to have directional channel knowledge ready, which reduces interference and noise during actual MU-MIMO testing, thereby improving system performance without adding operational complexity.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses copying by creating virtual MIMO propagation channels that replicate real-world directional channel characteristics based on beam pattern data. Instead of dealing with complex physical interference directly, the test device creates simplified virtual channel models that copy the essential directional properties, making the testing process more manageable while maintaining accuracy.

Inventive Principle:

Principle #26Copying

2Productivity

If the network test device uses open-loop optimization with algorithms to maximize SINR, then the throughput is maximized, but the computational time and complexity increase

Engineering Contradiction:

ImprovethroughputVSAvoidcomputational time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-obtaining beam pattern information from the gNodeB before creating MIMO propagation channels. This advance preparation allows the test device to have directional channel knowledge ready, which reduces interference and noise during actual MU-MIMO testing, thereby improving system performance without adding operational complexity.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses copying by creating virtual MIMO propagation channels that replicate real-world directional channel characteristics based on beam pattern data. Instead of dealing with complex physical interference directly, the test device creates simplified virtual channel models that copy the essential directional properties, making the testing process more manageable while maintaining accuracy.

Inventive Principle:

Principle #26Copying

3Object-affected harmful factors

If multiple layers are selected from candidate locations based on multiple criteria, then the interference is minimized, but the selection process becomes more complex

Engineering Contradiction:

ImproveinterferenceVSAvoidselection process complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-obtaining beam pattern information from the gNodeB before creating MIMO propagation channels. This advance preparation allows the test device to have directional channel knowledge ready, which reduces interference and noise during actual MU-MIMO testing, thereby improving system performance without adding operational complexity.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses copying by creating virtual MIMO propagation channels that replicate real-world directional channel characteristics based on beam pattern data. Instead of dealing with complex physical interference directly, the test device creates simplified virtual channel models that copy the essential directional properties, making the testing process more manageable while maintaining accuracy.

Inventive Principle:

Principle #26Copying

Data Source

PatentEP4708953A1Creating channels for network testing using network beam information

Publication Date: 2026.03.11 VIAVI SOLUTIONS INC(US)

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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.