LOS-MIMO Radio Link Performance Prediction
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Solution Overview
Problem
Current radio network planning tools lack the capability to predict the performance and availability of Line-Of-Sight (LOS) multiple-input multiple-output (MIMO) radio links, which is essential for ensuring network reliability and customer satisfaction, as existing models primarily focus on single-input single-output (SISO) links and do not account for the unique interference and signal propagation characteristics of MIMO systems.
Innovation Solution
A method and tool that determine the LOS-MIMO radio link operating conditions by calculating an incremental gain based on phase difference distributions, using existing databases for weather and refractivity data, and accounting for antenna geometry, to predict performance metrics such as throughput and outage, thereby addressing the gap in existing models by incorporating MIMO-specific parameters and phase noise considerations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If SISO attenuation models are used for radio link planning, then the planning process is simple and existing databases can be utilized, but the prediction accuracy for LOS-MIMO radio links is insufficient
Solution Approach 1:
The patent merges SISO attenuation models with MIMO-specific parameters (phase difference distributions, incremental gain calculations) to create a hybrid prediction model. This combines the simplicity and data availability of existing SISO models with the accuracy requirements for MIMO systems, allowing planners to use familiar tools while achieving MIMO-level prediction precision.
Solution Approach 2:
The patent introduces new parameters specific to MIMO systems (phase difference distributions, LOS-MIMO incremental gain) into the existing SISO framework. By modifying the model to account for multiple antennas and their phase relationships, the system achieves accurate MIMO performance prediction while maintaining the computational efficiency of established attenuation models.
2Reliability
If LOS-MIMO specific parameters are incorporated into the prediction model, then the prediction accuracy for MIMO links improves, but the complexity of the planning tool increases
Solution Approach 1:
The patent segments the prediction process into distinct modules: SISO attenuation calculation, phase difference distribution analysis, LOS-MIMO incremental gain computation, and final performance prediction. This modular approach allows each component to be developed and validated independently, reducing overall system complexity while maintaining high prediction reliability for link availability.
3Productivity
If phase difference distributions are calculated to determine LOS-MIMO incremental gain, then the throughput prediction accuracy improves, but the computational requirements increase
Solution Approach 1:
The patent performs preliminary calculations of phase difference distributions and statistical characteristics during the planning phase, before actual link deployment. By pre-computing these parameters based on antenna geometry and propagation conditions, the system reduces real-time computational requirements while maintaining high throughput prediction accuracy for network planning decisions.
Data Source
AI summary
A method for predicting the performance of a Line-Of-Sight, LOS, multiple-input multiple-output, MIMO, radio link, the method comprising the steps of determining a single-input single-output, SISO, radio link operating condition comprising a SISO system gain, and calculating a LOS-MIMO incremental gain of the LOS-MIMO radio link, as well as modifying the determined SISO radio link operating condition by accounting for the calculated LOS-MIMO incremental gain in the SISO system gain to obtain a LOS-MIMO radio link operating condition comprising a LOS-MIMO system gain, and also obtaining a set of operating condition requirements of the LOS-MIMO radio link. The method also comprising the step of predicting the LOS-MIMO radio link performance by comparing the LOS-MIMO radio link operating condition to the operating condition requirements of the LOS-MIMO radio link.