octoBox Presentation
January 2015 [email protected] 2 Portable Wireless Test Applications Multipath emulation Interference generation Roaming / hand-off Throughput Throughput vs. rotation Video and multi-room emulation www.octoscope.com 3 Key Wireless Test Capabilities Throughput performance Complete isolation Controlled interference Roaming behavior (sticky clients) Interoperability (vendor to vendor) Emulate a multi-room house https://www.youtube.com/watch?v=NYbUKICCNeo www.octoscope.com 4 Throughput Test Configuration • octoBox Devices in the testbed DUT orientation vs. test antennas Turn table rotation speed Traffic generation (iperf or IxChariot) Test Antennas quadAtten Traffic TX/RX DUT AP • Multipath Emulator Master client Remote Desktop Powerful test automation controls Automated graphical test reporting lets you Automatically compile multiple results files into a single Excel plot Save hours or days of laborious testing and data logging Eliminate human error Ship better tested devices months sooner www.octoscope.com 5 Throughput vs. Range Test Automation OB-THROUGHPUT script controls iperf or IxChariot, turn table and programmable attenuators, outputs Excel plot TCP Throughput 400 Each point on the plot may be averaged over time (e.g. 1 minute) for statistically valid result. Each point can also simultaneously be averaged vs. DUT orientation with respect to test antennas. Averaging = repeatability. 350 Throughput (Mbps) 300 250 200 150 100 50 0 0 10 20 30 40 Attenuation Setting (dB) 50 60 www.octoscope.com 6 Throughput vs. Range vs. Orientation Test Automation OB-THROUGHPUT script controls iperf or IxChariot, turn table and programmable attenuators, outputs Excel plot www.octoscope.com octoBox Testbed Configuration Tutorial https://www.youtube.com/watch?v=GwKcxrXAbeU www.octoscope.com 8 Key Wireless Test Capabilities Throughput performance Complete isolation Controlled interference Roaming behavior (sticky clients) Interoperability (vendor to vendor) Emulate a multi-room house https://www.youtube.com/watch?v=SKl857UkO04 www.octoscope.com 9 Jperf Run in the 5 GHz Band, 80 MHz Channel octoBox door closed octoBox door open Contention with outside Wi-Fi traffic when the octoBox door is open makes measurements erratic and nonrepeatable. www.octoscope.com 10 Jperf Run in the 2.4 GHz Band, 20 MHz Channel octoBox door closed octoBox door open www.octoscope.com 11 Achieving Repeatability • Complete isolation octoBox testbed design with filtered data and power connections provides complete isolation Reference measurement TX antenna RX antenna Door open RX antenna Isolation measurement from back Door closed www.octoscope.com 12 Isolation and Filtering • Creating controlled RF conditions with good isolation is challenging, particularly for large-scale RF testbeds, such as multi-room home or a mesh network. Short wavelength high frequency signals couple via many paths, including copper cabling, poor/aging gasketing, ground loops, etc. Sources of interference may be difficult to locate in a multi-box setup. • AC power filter Fan Isolation considerations Up to 4 high speed data filters Fits up to 4 filters Isolation should be measured and specified with a fully cabled test setup. All copper cabling, including Ethernet and power cabling, will act as antennas contributing to RF coupling among enclosures and thus limiting attenuation range setting. Upfront investment into high grade enclosures with good data and power feed-through filtering and absorptive foam can save 1-2 months of chasing uncontrolled paths of interference in the test setup. octoBox feed-through high speed data filters www.octoscope.com 13 Filters Internal side OBS-05 Ethernet filter OBS-06 USB filter OBS-08 HDMI filter OBS-07 DC filter External side www.octoscope.com 14 Achieving Repeatability • Anechoic (non-echoing) >20dB of absorption allows for OTA (over the air) testing which is essential when working with devices with embedded antennas (laptops, cellphones etc.) www.octoscope.com 15 octoBox-26 Internal View Small octoBox GPS antenna Filtered USB Filtered Ethernet Wi-Fi antenna Cellular antenna 13.35” DUT shelf Plastic rails and shelf www.octoscope.com Antennas and Cable Connections www.octoscope.com octoBox vs. Common Shield Box https://www.youtube.com/watch?v=Q6xIcTSVKeo www.octoscope.com 18 Key Wireless Test Capabilities Throughput performance Complete isolation Controlled interference Roaming behavior (sticky clients) Interoperability (vendor to vendor) Emulate a multi-room house www.octoscope.com 19 octoBox iGen Interference Generator • Generates Wi-Fi traffic or an interference waveform • Traffic… Realistic traffic with contention ON/OFF selection Can be captured traffic for replay or supplied packet sequence Software controlled: gap between packets, packet length, channel frequency and width • Waveform can be a radar emulation for 802.11h DFS testing or other common interference source, such as OOK signal or a frequency hopping signal ACI = adjacent channel interference OOK = on off keying 802.11 ACI significantly impacts performance www.octoscope.com 20 Key Wireless Test Capabilities Throughput performance Complete isolation Controlled interference Roaming behavior (sticky clients) Interoperability (vendor to vendor) Emulate a multi-room house https://www.youtube.com/watch?v=jGThhcHmwUc www.octoscope.com 21 octoBox Roaming Testbed AP1 conducted 4 AP2 conducted Ping PC quadAtten Ethernet Ping PC 4 Pinging Linux PCs RF combiner 4 quadAtten octoBox Console 4 Console 4 OTA Ethernet filter Note: APs can be replaced by base stations for 2G/3G/LTE roaming testing OB-26 triStack OTA = over the air www.octoscope.com 22 Roaming Test Script Controls motion, velocity, distance between APs, pinging, graphical reporting The octoBox testbed supports multi-AP multiclient roaming scenarios www.octoscope.com 23 Key Wireless Test Capabilities Throughput performance Complete isolation Controlled interference Roaming behavior (sticky clients) Interoperability (vendor to vendor) Emulate a multi-room house https://www.youtube.com/watch?v=CaNxaTXCWWc www.octoscope.com Wi-Fi Alliance Testbed www.octoscope.com Ethernet filters Wi-Fi Alliance Testbed in an OB-38 triStack Wireless Sniffer Sigma UCC Sigma AP Control Agent WFA EMT RF combiner Ethernet Switch 5n Sigma PC End Point RADIUS Server DUT … Ethernet Switch 5n Control Ethernet Test Ethernet Ethernet Switch n = MIMO order of testbed devices www.octoscope.com Vendor to Vendor Interoperability • Use throughput or roaming testbed to test throughput performance or roaming behavior with devices from different vendors • The entire Wi-Fi Alliance testbed can be housed in an OB-38 triStack configuration Ethernet Traffic endpoint octoBox Test Antennas quadAtten Ethernet, power DUT AP Test antennas DUT AP Multipath Emulator MPE Bridge Ethernet Console Ethernet Bridge USB or Ethernet/POE www.octoscope.com 27 Key Wireless Test Capabilities Throughput performance Complete isolation Controlled interference Roaming behavior (sticky clients) Interoperability (vendor to vendor) Emulate a multi-room house https://www.youtube.com/watch?v=UTXtebyORQA www.octoscope.com 28 Multiple Boxes to Emulate Multli-room Connected House Controlled environment octoBox testbed emulating a multi-room house Three OB-38 triStacks Source: Multimedia over Coax Alliance www.octoscope.com 29 Testbed Emulating an 8-room House + Basement Video Gateway Video, data over Wi-Fi testbed www.octoscope.com 30 Emulate Walls and Distance octoBox quadAtten emulates walls, floors/ceilings, space and motion of devices. = www.octoscope.com 31 Emulate Multipath MPE module emulates multipath reflections from walls and other surfaces. Matches the IEEE 802.11 models of a typical house or a typical office. MPE (Multipath emulator) = www.octoscope.com 32 Generate Interference octoBox iGen interference generator generates realistic multi-channel interference. = www.octoscope.com 33 octoBox Controlled Test Environment Technologies Applications Wi-Fi Throughput LTE Roaming 2G/3G Wi-Fi Alliance Bluetooth Wireless video ZigBee Coexistence Proprietary Multi-node/mesh Capabilities MIMO (up to 8x8) Multipath + path loss Multi-channel interference Turn table for realistic results Completely isolated Stackable, configurable, portable Powerful test automation www.octoscope.com Controlled Environment Essential for Meaningful Results Wi-Firate DUT’s data rate adaptation Expected behavior adaptation vs.vs. RSSI all the way down Not returning to RSSI to the RSSI level of -95 dBm. 54 Mbps Data rate vs. Measured DUT RSSI is less than -95 dBm. This means Master to DUT coupling RSSIof less than -100 dBm. • Rate adaptation isn’t optimum – DUT is not returning to the maximum data rate of 802.11g of 54 Mbps • High isolation enables testing all the way down to the bottom of the RX dynamic range (-96 dBm in this example) • Wi-Fi RX is sensitive enough to receive a small fraction of a microvolt and hence requires complete isolation from outside noise to enable observing the real performance or DUT behavior (e.g. rate or MCS adaptation) www.octoscope.com 35 Customer Value Proposition • Repeatable RF environment makes wireless measurements easy to manage • Automation accelerates data collection and time to market; improves quality • Graphical reporting helps visualize device performance or behavior issues Portable wireless test platform delivers cost-effective high performance repeatable MIMO OTA environment www.octoscope.com 36 Contact [email protected] Phone: +1.978.222.3114 Littleton, MA USA www.octoscope.com
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