Krishna Kandula
Product Specialist, Wi-Fi Test
Blog

Accelerate Dynamic Frequency Selection Testing by 10X

July 30, 2019 by Krishna Kandula

ETSI, FCC, MIC, Korea and China DFS specifications mandate that radio devices operating in the 5 GHz frequency band implement a mechanism to avoid interference with radar systems. This is called Dynamic Frequency Selection; it’s about radar-detection and avoidance. 

Wi-Fi master devices that operate in frequency bands 5250 MHz to 5350 MHz and/or 5470 MHz to 5725 MHz should make sure the channel is available by doing a channel availability check (CAC) before starting its operation and also continue to monitor for radar signals while using the channel. If at any time a Wi-Fi master device finds a radar signal, it should cease operation and move to a different channel according to response time requirements mandated in the specification.

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Reference – FCC 2016

DFS testing is critical and unavoidable. It can also be expensive and time-consuming, typically taking two or more weeks.

How to Speed Up DFS Testing 10X

With Ixia’s WaveDFS test solution, users can cut down DFS test cases from two weeks to less than 2 days.

WaveDFS is a fully integrated DFS test solution that comes with a radar signal generator, device under test (DUT) radar detection and monitoring, Ethernet server, Wi-Fi station (STA) and also traffic generation capabilities.

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WaveDFS supports the following DFS specifications testing with the click of a button.  

  • USA FCC 

               - FCC 2006 
               - FCC 2014
               - FCC 2016 

  • EUROPE ETSI 

               - ETSI v1.5.1 
               - ETSI v1.6.1 
               - ETSI v1.7.1 
               - ETSI v1.8.1 
               - ETSI v1.8.1 
               - ETSI v2.1.1 
               - ETSI v2.1.3 (302 502) 

  • JAPAN MIC 
  • KOREA 
  • CHINA 

Validating Selected DFS Specifications

Validating any selected DFS specification listed above with WaveDFS is a simple 3-step process. 

  • Configure Hardware – Connect to setup and configure two Wi-Fi ports - one for radar pulse generation and another for monitoring DUT activity. If you need traffic simulation to work in parallel, also select an Ethernet port. 
  • Configure Test Parameters – Configure detection mode, Center Frequency and Signal Bandwidth parameters. To generate traffic, configure Wi-Fi client and traffic properties. 
  • Select DFS Specification – The final step is to choose the DFS specification and which types to validate during the test. 

Application software also provides the user with additional control to measure the channel utilization with a given traffic load, as DFS specifications require minimum channel load during testing. The channel utilization chart provides total utilization percentage as well as for data, management and control frames. 

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As an example, users can choose the following types for FCC validation:

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Application software validates each FCC type by generating 30 pulses and determining the detection probability percentage across for each type. 

Results and Reports

WaveDFS also provides detailed results for each test for further analysis with great information detail.

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Application software also provides real-time results along with detection status and time for each iteration during the test. 

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All these features come with full automation support. Users can automate all these tests very easily using the WaveDFS automation tool. 

Contact us if you would like to evaluate or understand more about the WaveDFS product. 

Additional Resources

Ixia IxVeriWave Product

Ixia IxVeriWave DFS Report