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Network Testing and Emulation Solutions

Example LANforge WiFi Test Reports

With the release of LANforge version 5.3.9, we have significantly improved our automated test cases and reports. The older WiFi Capacity, Port Reset, and WiFi Mobility tests have been improved and can now be launched from our new Chamber View scenario creation and management system. In addition, we have added new Rate vs Range, Dataplane throughput, and Receiver Sensitivity tests. When the tests are completed, they can be saved has html and pdf with the click of a button. Candela Technologies can provide all of the LANforge WiFi traffic generators, RF Chambers, and programmable attenuators used to run these test cases.

Dataplane Throughput Test

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The Candela WiFi data plane test is designed to conduct an automatic testing of all combinations of station types, MIMO types, Channel Bandwidths, Traffic types, Traffic direction, Frame sizes etc… It will run a quick throughput test at every combination of these test variables and plot all the results in a set of charts to compare performance. The user is allowed to define an intended load as a percentage of the max theoretical PHY rate for every test combination. The expected behavior is that for every test combination the achieved throughput should be at least 70% of the theoretical max PHY rate under ideal test conditions. This test provides a way to go through hundreds of combinations in a fully automated fashion and very easily find patterns and problem areas which can be further debugged using more specific testing.

Requirements

Requires just a LANforge WiFi test system, but RF chambers are very helpful.

Example Chart

Example Report

Example Dataplane report.

Cookbook

Dataplane Cookbook

Rate vs Range

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This test measures the performance over distance of the Device Under Test. Distance is emulated using programmable attenuation and a throughput test is run at each distance/RSSI step and plotted on a chart. The test allows the user to plot RSSI curves both upstream and downstream for different types of traffic and different station types.

Requirements

Requires LANforge WiFi test system, programmable attenuator. RF Chambers are required to test at the lowest signal levels, but you can test at modestly weak signal without chambers.

Sample Report

Example Rate vs Range report.

Cookbook

Rate vs Range Cookbook

Receiver Sensitivity

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In the real-world the Device Under Test WiFi receiver is expected to handle stations at many different receive signal strengths and many different station transmit modulation and coding schemes (MCS rates). The Candela Receiver Sensitivity test provides an excellent way to test the DUT receiver for all combinations of station transmit power and MCS rates. It can report packet loss and throughput for all combinations. The test plots the receiver sensitivity curves and can provide a clear indication of problem patterns for certain combinations of Tx power and MCS rates. The expected behavior is for the DUT to achieved equal of better receiver sensitivity as defined by the spec for all RSSI and MCS settings.

Requirements

Requires LANforge WiFi test system with Wave-2 radio (4x4 /AC), programmable attenuator. RF Chambers are required to test at the lowest signal levels, but you can test at modestly weak signal without chambers.

Sample Chart

Example Report

Example Receiver Sensitivity report.

Cookbook

Receiver Sensitivity Cookbook

WiFi Capacity

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The Candela WiFi Capacity test is designed to measure performance of an Access Point when handling different amounts of WiFi Stations. The test allows the user to increase the number of stations in user defined steps for each test iteration and measure the per station and the overall throughput for each trial. Along with throughput other measurements made are client connection times, Fairness, % packet loss, DHCP times and more. The expected behavior is for the AP to be able to handle several stations( within the limitations of the AP specs) and make sure all stations get a fair amount of airtime both in the upstream and downstream. An AP that scales well will not show a significant over-all throughput decrease as more stations are added.

Requirements

Requires LANforge WiFi test system. RF Chambers are suggested for repeatability and good performance. Programmable or fixed attenuators may be needed to attain optimal RF signal quality.

Sample Chart

Example Report

Example WiFi Capacity report.

Cookbook

WiFi Capacity Cookbook

WiFi Mobility and Roaming

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The Candela Roam test uses the forced roam method to create and roam hundreds of WiFi stations between two or more APs with the same SSID on the same channel or different channels. The user can run thousands of roams over long durations and the test measures roaming delay for each roam, station connection times, network down time, packet loss etc.. The user can run this test using different security methods and compare the roaming performance. The expected behavior is the roaming delay should be 50msecs or less for all various kinds of fast roaming methods to avoid any form of service interruption to real-time delay sensitive applications.

Requirements

Requires LANforge WiFi test system. RF Chambers are suggested for repeatability and good performance. Programmable or fixed attenuators may be needed to attain optimal RF signal quality.

Sample Chart

Example Report

Example WiFi Roaming report.

Cookbook

WiFi Roaming Cookbook Example

Port Reset Test

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The port reset test allows user to create lots of WiFi stations and connect them the AP under test and then disconnect and reconnect a random number of stations at random intervals. The objective of this test is to mimic a enterprise/large public venue scenario where a number of stations arrive, connect and depart in quick succession. This test when run over a long duration can stress the various control and management aspects of the core Access Point functions and can often times find very interesting problems with the APs. A successful test result would be that AP remains stable over the duration of the test and that stations can continue to reconnect to the AP.

Requirements

Requires LANforge WiFi test system. RF Chambers are suggested for repeatability and good performance. Programmable or fixed attenuators may be useful for testing association performance at various RF signal levels.

Sample Chart

Example Report

Example Report.

Cookbook

WiFi Port Reset Cookbook

Candela  Technologies, 2417 Main Street, Suite 201, Ferndale, WA 98248, USA
www.candelatech.com | sales@candelatech.com | +1.360.380.1618
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