MU-MIMO Interference Simulation Using Dummy Signals
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Solution Overview
Problem
Mobile terminal testing devices face increased processing loads when the number of layers of interference signals increases, due to the creation and processing of parameters for interfering cells.
Innovation Solution
A mobile terminal testing device that simulates a base station, using a layer processing unit to transmit dummy signals with reduced processing for MU-MIMO multiplex signals, allowing for adjustable interference settings and reduced processing load by omitting higher processing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of layers of interference signals is increased to simulate more complex MU-MIMO interference scenarios, then the testing capability and realism of the simulation is improved, but the processing load of the mobile terminal testing device increases significantly
Solution Approach 1:
The patent extracts and transmits only the necessary lower layer signals (physical layer and MAC layer) for interference simulation, while omitting higher layer processing (RLC and above). This selective extraction approach reduces the processing load significantly while still enabling accurate MU-MIMO interference testing, as the lower layer signals contain the essential interference characteristics needed for valid test results.
Solution Approach 2:
The patent applies partial action by processing only the necessary portion of the signal (lower layers) rather than complete processing of all layers. This partial processing approach is sufficient for interference simulation purposes, achieving the testing objective without the excessive processing burden of complete signal processing for multiple layers.
2Reliability
If parameters of interfering cells are created from parameters of interfered cells to simulate interference states, then the realism of the interference simulation is improved, but the processing complexity and time consumption increase
Solution Approach 1:
The patent extracts only the essential lower layer signal parameters needed for interference simulation, avoiding the time-consuming creation and processing of higher layer parameters for interfering cells. This selective extraction maintains simulation realism while significantly reducing processing time.
Solution Approach 2:
The patent uses dummy signals that copy the essential characteristics of real interference signals at the lower layers, without requiring complete parameter creation from interfered cells. This copying approach maintains sufficient realism for testing while avoiding the time consumption of complete parameter derivation.
Data Source
AI summary
A mobile terminal testing device includes a layer processing unit 3 that communicates with a mobile terminal 10 by performing processing of each layer of a layer-configured communication protocol with a plurality of layers, in which the layer processing unit 3 includes a PHY processing unit 31 that performs multiplexing, channel coding, or the like in order to transmit and receive communication data transmitted to and received from the mobile terminal 10, in which the PHY processing unit 31 transmits a dummy signal, by omitting higher processing from predetermined processing, for an interference signal in multi user-multi input multi output (MU-MIMO) multiplex signals, in a case of testing MU-MIMO terminal-to-terminal interference.