IoT module testing for smart city applications

February 19, 2019 //By Ally Winning
IoT module testing for smart city applications
Rohde & Schwarz is demonstrating a platform can perform realistic test scenarios for IoT modules in smart cities.

The CMW-KM052 IP security option for the company’s R&S CMW platform performs deep packet inspection (DPI) during normal operation in a user-configurable network environment. The tests allow users to see if and how the connection is encrypted, whether any ports are open, and more. They can also verify that the module only communicates with approved servers. In the test setup, the new R&S CMW-KM052 option runs on an R&S CMW290 wireless connectivity tester.

The R&S CMW290 also performs measurements to optimize the battery lifetime of the IoT module. The test setup includes an R&S RT-ZVC04A four-channel power probe and the R&S CMWrun sequencer software that controls the test sequence. The power probe measures current and voltage simultaneously at various points on the IoT module in the different operating modes - even minute currents in the nanoampere range. The R&S CMW290 enables waveform analysis and precise time correlation with events from the NB-IoT interface, simplifying analysis.

Another test setup with an R&S CMW500 wideband communication tester simulates real field conditions for wireless modules with NB-IoT and LTE interfaces. Test cases can easily be generated from scenarios recorded in drive test logs. These scenarios can then be reproduced with the R&S CMW500 for lab tests. The tester generates the network environment, signal strength and signal quality (RSRP/RSRQ) recorded in the drive test logs and records the behaviour of the IoT module under these various environmental conditions, enabling users to analyze critical processes.

Rohde & Schwarz will also demonstrate combined RF and functional testing for NB-IoT and Bluetooth 5.0 LE signalling on an R&S CMW290 IoT radio communication tester. The DUT is an IoT device solution for rental bicycles that has interfaces for both transmission methods.

More information

www.rohde-schwarz.com/mwc

MWC Booth 6C 40

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