Enterprise Scenario and DSC in IEEE 802.11-15
Explore the usage of Dynamic Sensitivity Control (DSC) in an enterprise scenario with IEEE 802.11-15. Analyze signal strengths between Access Points (APs) and Stations (STAs) to enhance throughput and channel re-use efficiency. Understand the topography and channel characteristics to optimize network performance.
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May 2015 doc.: IEEE 802.11-15/0548r0 TG ax Enterprise Scenario and DSC Date: 2015-05 Authors: Name Graham Smith Company Address SR Technologies Phone email gsmith@srtrl.com Submission Slide 1 Graham Smith, SR Technologies
May 2015 doc.: IEEE 802.11-15/0548r0 Background The Enterprise scenario uses four 80MHz channels. Estimating the relative signal strengths between the APs, APs and STAs and STAs can indicate if DSC can improve the throughput. This is examined. Similarly, 9 channel re-use is examined. Submission Slide 2 Graham Smith, SR Technologies
May 2015 doc.: IEEE 802.11-15/0548r0 Topography 20m 20m AP Layout 4 channels STAs 20m 29m Submission Slide 3 Graham Smith, SR Technologies
May 2015 doc.: IEEE 802.11-15/0548r0 4 Channel re-use STA to STA -55dBm AP to STA -43dBm AP to AP -64dBm STA to STA -75dBm ALL STAs and APs are overlapping Submission Slide 4 Graham Smith, SR Technologies
May 2015 doc.: IEEE 802.11-15/0548r0 4 Channel Re-use STA to STA -55dBm AP to STA -43dBm -49dBm Upper Margin STA to STA -75dBm AP to AP -64dBm No Hidden STAs, -55dBm worse case STA to STA Assume DSC Upper Margin -30dBm Margin -25dB Note AP to AP -64dBm Furthest STA to AP -48dBm Worse case SNIR at AP is 16dB Submission Slide 5 Graham Smith, SR Technologies
May 2015 doc.: IEEE 802.11-15/0548r0 4 Channels with DSC -40dBm DSC = -65dBm -43dBm DSC -68dBm -38dBm DSC -63dBm -68dBm is 18m with 1 Wall -65dBm is 15m with 1 Wall -63dBm is 13m with 1 wall STA to STA Approx 70% of STAs Are not overlapping AP to AP -64dBm DSC Setting 55dBm No AP Overlap But SNIR reduced for furthest STAs ~45% Submission Slide 6 Graham Smith, SR Technologies
May 2015 doc.: IEEE 802.11-15/0548r0 9 Channel Re-Use 20m AP Layout 9 channels -69dBm -43dBm -79dBm AP to AP -70dBm APs and All STAs are Overlapping With DSC NO OVERLAP Worse case DSC setting is -68dBm Submission Slide 7 Graham Smith, SR Technologies
May 2015 doc.: IEEE 802.11-15/0548r0 Summary 4 Channel Re-Use All APs and ALL STAs on same channel are overlapping. With DSC about 30% of STAs overlap, and AP SNIR is low for signals from ~45% of STAs What is the throughput difference? 9 Channel Re-Use All APs and ALL STAs on same channel are overlapping. With DSC APs do not overlap STAs do not overlap What is throughput difference compared to 4 channel and 9 channel? Throughput must be improved if DSC is employed Submission Slide 8 Graham Smith, SR Technologies
May 2015 doc.: IEEE 802.11-15/0548r0 Point when simulating DSC DSC is Dynamic Sensitivity Control If just setting CCA Threshold, then any signal over threshold (-90dBm) must be received, looked at, and then only if determined not for me, AND energy <-82dBm is packet dropped Time is wasted DSC sets the RX Sensitivity If received signal below the DSC setting, it is simply not seen. No time wasted Submission Slide 9 Graham Smith, SR Technologies
May 2015 doc.: IEEE 802.11-15/0548r0 Conclusion In the Enterprise Scenario DSC should improve the area throughput in both 4 channel and 9 channel cases Legacy in 4 and 9 channels results in complete overlap 4 channel will still have overlapping STAs and reduced SNIR for APs, but uses 80MHz channels 9 channel will have no overlapping STAs but uses 40MHz channels. In either case, DSC should show an improvement over legacy sensitivity and CCA threshold settings. Well worthwhile simulating the two conditions with DSC Submission Slide 10 Graham Smith, SR Technologies
