Presentation is loading. Please wait.

Presentation is loading. Please wait.

Real Air-time Occupation by Beacon and Probe

Published byLeony Setiawan Modified over 6 years ago

Similar presentations

Presentation on theme: "Real Air-time Occupation by Beacon and Probe"— Presentation transcript:

1 Real Air-time Occupation by Beacon and Probe
October 2011 doc.: IEEE /1413r0 October 2011 Real Air-time Occupation by Beacon and Probe Date: Authors: Katsuo Yunoki, KDDI R&D Laboratories Katsuo Yunoki, KDDI R&D Laboratories

2 October 2011 doc.: IEEE /1413r0 October 2011 Abstract This document is not proposal. It is reporting the real Air-time occupation due to explosive increase of Smart- phones. Katsuo Yunoki, KDDI R&D Laboratories Katsuo Yunoki, KDDI R&D Laboratories

3 October 2011 doc.: IEEE /1413r0 October 2011 Motivation 3G mobile operators have demand to offload their data traffics to WLAN network. Especially, they have higher demands for the locations where many people meet or stay for data offloading, because high data traffics occur at those locations. It’s highly expected that FILS will realize transition from 3G to WLAN in very short time. Katsuo Yunoki, KDDI R&D Laboratories Katsuo Yunoki, KDDI R&D Laboratories

4 Real world (1) Number of Smart-phone is increasing.
October 2011 doc.: IEEE /1413r0 October 2011 Real world (1) Number of Smart-phone is increasing. iPhone, Android, Windows-phone, Blackberry… Smart-phone holders always touch its screen. While its screen is activated (backlight turned on), Smart-phone starts searching surrounding WLAN-APs. Katsuo Yunoki, KDDI R&D Laboratories Katsuo Yunoki, KDDI R&D Laboratories

5 October 2011 doc.: IEEE /1413r0 October 2011 Real world (2) Many Smart-phone holders are in the crowded commuter train. Imagine what happens when the train arrives at the station. Air monitoring was executed at a train station in Tokyo. Results are explained in the following slides. Katsuo Yunoki, KDDI R&D Laboratories Katsuo Yunoki, KDDI R&D Laboratories

6 Conditions Time/Date: Around 18:00 / October 11(Tue), 2011
doc.: IEEE /1413r0 October 2011 Conditions Time/Date: Around 18:00 / October 11(Tue), 2011 Location: Shinjuku station (Keio line), Tokyo Monitoring CH: 6CH(2,437MHz) Monitoring period: 300 seconds (5 minutes) <Equipment> Thinkpad X200 Windows XP USB Wireless Monitor Adoptor (Air Pcap NX) Wireshark Measured CH Katsuo Yunoki, KDDI R&D Laboratories Katsuo Yunoki, KDDI R&D Laboratories

7 Result Observed frames October 2011 Frames Bytes Count % Beacon 13,871
doc.: IEEE /1413r0 October 2011 Result Observed frames Frames Bytes Count % Beacon 13,871 15.05 1,689,040 9.82 Probe Request 7,139 7.75 989,797 5.75 Probe Response 24,687 26.79 2,941,331 17.10 Other 46,462 50.42 11,581,634 67.33 Total 92,159 17,201,802 Katsuo Yunoki, KDDI R&D Laboratories Katsuo Yunoki, KDDI R&D Laboratories

8 Result (cont.) Frames Bytes Time occupation is more important.
October 2011 doc.: IEEE /1413r0 October 2011 Result (cont.) Frames Bytes Time occupation is more important. Doc. IEEE /1031r0 was referred for time occupation analysis. Katsuo Yunoki, KDDI R&D Laboratories Katsuo Yunoki, KDDI R&D Laboratories

9 Transmission Rate October 2011 October 2011
doc.: IEEE /1413r0 October 2011 Transmission Rate Rate [Mbps] Beacon Probe Request Probe Response Others Frames % 1 13,861 99.93 6,547 91.71 24,606 99.67 12,956 27.89 2 0.00 21 0.29 4 0.02 504 1.08 6 13 0.18 7 0.03 467 1.01 113 0.24 9 3 0.04 230 0.50 11 0.01 510 7.14 15 0.06 2,766 5.95 12 288 0.62 18 0.10 341 0.73 24 0.05 13,793 29.69 36 1,309 2.82 48 10 0.14 1,953 4.20 54 20 0.28 31 0.13 11,742 25.27 Total 13,871 7,139 24,687 46,462 Katsuo Yunoki, KDDI R&D Laboratories Katsuo Yunoki, KDDI R&D Laboratories

10 Transmission Rate (cont.)
October 2011 doc.: IEEE /1413r0 October 2011 Transmission Rate (cont.) Rate [Mbps] Beacon Probe Request Probe Response Others Bytes % 1 1,688,640 99.98 838,510 84.72 2,849,896 96.89 871,812 7.53 2 0.00 10,019 1.01 5,257 0.18 466,650 4.03 6 12,633 1.28 10,710 0.36 531,043 4.59 1,590 0.16 1,530 0.05 127,094 1.10 9 2,631 0.27 301,819 2.61 11 80 76,565 7.74 13,848 0.47 687,560 5.94 12 3,060 0.31 6,120 0.21 215,459 1.86 18 10,198 1.03 8,212 0.28 287,119 2.48 24 280 0.02 3,154 0.32 5,279 805,136 6.95 36 4,590 967,971 8.36 48 13,509 1.36 2,259 0.08 1,285,716 11.10 54 40 17,928 1.81 32,100 1.09 5,034,255 43.47 Total 1,689,040 989,797 2,941,331 11,581,634 Katsuo Yunoki, KDDI R&D Laboratories Katsuo Yunoki, KDDI R&D Laboratories

11 Occupied Time Calculation (Beacon)
October 2011 doc.: IEEE /1413r0 October 2011 Occupied Time Calculation (Beacon) Occupied Time Beacon DIFS CW TX TIME aSlotTime: 20us aSIFSTime: 10us aPreambleLength: 144us aPLCPHeaderLength: 48bits aCWmin: 31 aCWmax: 1023 DIFS: 50us CW: 620us Occupied Time = ∑((DIFS + CW + aPreambleLength + aPLCPHeaderLength/DATARATE) * TotalFrames + (TotalBytes * 8/DATARATE)) = (( / 1.0) * 13,861 + (1,688,640 * 8 / 1.0) + (( / 11.0) * 2 + (80 * 8 / 11.0) + (( / 24.0) * 7 + (280 * 8 / 24.0) + (( / 54.0) * 1 + (280 * 8 / 54.0) = 25,465,623 us (8.49%) Katsuo Yunoki, KDDI R&D Laboratories Katsuo Yunoki, KDDI R&D Laboratories

12 Occupied Time Calculation (Probe Request)
October 2011 doc.: IEEE /1413r0 October 2011 Occupied Time Calculation (Probe Request) Occupied Time Probe Request DIFS CW TX TIME Occupied Time = ∑((DIFS + CW + aPreambleLength + aPLCPHeaderLength/DATARATE) * TotalFrames + (TotalBytes * 8/DATARATE)) = (( / 1.0) * 6,547 + (838,510 * 8 / 1.0) + (( / 2.0) * 21 + (10,019 * 8 / 2.0) + (( / 5.5) * 13 + (12,633 * 8 / 5.5) + (( / 6.0) * 2 + (1,590 * 8 / 6.0) + (( / 9.0) * 3 + (2,631 * 8 / 9.0) + (( / 11.0) * (76,565 * 8 / 11.0) + (( / 12.0) * 2 + (3,060 * 8 / 12.0) + (( / 18.0) * 7 + (10,198 * 8 / 18.0) + (( / 24.0) * 4 + (3,154 * 8 / 24.0) + (( / 48.0) * 10 + (13,509 * 8 / 48.0) + (( / 54.0) * 20 + (17,928 * 8 / 54.0) = 12,967,544us (4.32%) Katsuo Yunoki, KDDI R&D Laboratories Katsuo Yunoki, KDDI R&D Laboratories

13 Occupied Time Calculation (Probe Response)
October 2011 doc.: IEEE /1413r0 October 2011 Occupied Time Calculation (Probe Response) Occupied Time Probe Response ACK DIFS CW TX TIME SIFS TX TIME aSlotTime: 20us aSIFSTime: 10us aPreambleLength: 144us aPLCPHeaderLength: 48bits aCWmin: 31 aCWmax: 1023 DIFS: 50us CW: 620us ACKRate: 1Mbps ACKLength: 14Bytes Katsuo Yunoki, KDDI R&D Laboratories Katsuo Yunoki, KDDI R&D Laboratories

14 Occupied Time Calculation (Probe Response) (Cont.)
October 2011 doc.: IEEE /1413r0 October 2011 Occupied Time Calculation (Probe Response) (Cont.) Occupied Time = ∑((DIFS + CW + aPreambleLength + aPLCPHeaderLength/DATARATE +aSIFSTime + aPreambleLength + aPLCPHeaderLeangth / ACKRATE + ACKLength * 8 / ACKRATE) * TotalFrames + (TotalBytes * 8/DATARATE)) = (( / * 8 / 1.0) * 24,606 + (2,849,896 * 8 / 1.0) + (( / * 8 / 1.0) * 4 + (5,257 * 8 / 2.0) + (( / * 8 / 1.0) * 7 + (10,710 * 8 / 5.5) + (( / * 8 / 1.0) * 1 + (1,530 * 8 / 6.0) + (( / * 8 / 1.0) * 1 + (1,530 * 8 / 9.0) + (( / * 8 / 1.0) * 15 + (13,848 * 8 / 11.0) + (( / * 8 / 1.0) * 4 + (6,120 * 8 / 12.0) + (( / * 8 / 1.0) * 7 + (8,212 * 8 / 18.0) + (( / * 8 / 1.0) * 6 + (5,279 * 8 / 24.0) + (( / * 8 / 1.0) * 3 + (4,590 * 8 / 36.0) + (( / * 8 / 1.0) * 2 + (2,259 * 8 / 48.0) + (( / * 8 / 1.0) * 31 + (32,100 * 8 / 54.0) = 46,906,453us (15.64%) Katsuo Yunoki, KDDI R&D Laboratories Katsuo Yunoki, KDDI R&D Laboratories

15 Occupied Time Calculation Result
October 2011 doc.: IEEE /1413r0 October 2011 Occupied Time Calculation Result Packet type Occupancy rate (%) Occupied time (sec) Beacon 8.49 25.47 Probe Req. 4.32 12.97 Probe Res. 15.64 46.91 Other 71.55 216.65 Total 100.00 300.00 Katsuo Yunoki, KDDI R&D Laboratories Katsuo Yunoki, KDDI R&D Laboratories

16 October 2011 doc.: IEEE /1413r0 October 2011 Conclusion Because of WLAN enabled devices increasing, especially Smart-phones, WLAN air circumstances are getting more crowded. To see the benefits of effective FILS, improvement of air circumstances would be needed by reducing unnecessary packet exchanges. Katsuo Yunoki, KDDI R&D Laboratories Katsuo Yunoki, KDDI R&D Laboratories

17 References doc. IEEE802.11-11/1031r0 October 2011
Katsuo Yunoki, KDDI R&D Laboratories Katsuo Yunoki, KDDI R&D Laboratories

Download ppt "Real Air-time Occupation by Beacon and Probe"

Similar presentations

Doc.:IEEE 802.11-11/1523r4 Submission November 2011 Access Delay Reduction for FILS: Network Discovery & Access congestion Improvements Slide 1 Authors:

Doc.:IEEE /1523r4 Submission November 2011 Access Delay Reduction for FILS: Network Discovery & Access congestion Improvements Slide 1 Authors:
Doc.: IEEE 802.11-11/1031r0 Submission July 2011 Hitoshi MORIOKA, ROOT Inc.Slide 1 Air-time Consumption by Beacon and Probe Date: 2011-07-20 Authors:

Doc.: IEEE /1031r0 Submission July 2011 Hitoshi MORIOKA, ROOT Inc.Slide 1 Air-time Consumption by Beacon and Probe Date: Authors:
Doc.:IEEE 802.11-12/0439r0 March 2012 Switching between DCF and PP-MAC Date: 2012-3-14 Slide 1 Authors:

Doc.:IEEE /0439r0 March 2012 Switching between DCF and PP-MAC Date: Slide 1 Authors:
Submission doc.: IEEE 11-11/1413r4 January 2012 Katsuo Yunoki, KDDI R&D LaboratoriesSlide 1 Real Air-time Occupation by Beacon and Probe Date: 2012-01-12.

Submission doc.: IEEE 11-11/1413r4 January 2012 Katsuo Yunoki, KDDI R&D LaboratoriesSlide 1 Real Air-time Occupation by Beacon and Probe Date:
Doc.: IEEE 802.11-11/1019r1 Submission July 2011 MediaTek, Inc Slide 1 Supporting Large Number of STAs in 802.11ah Date: 2011-07-20 Authors:

Doc.: IEEE /1019r1 Submission July 2011 MediaTek, Inc Slide 1 Supporting Large Number of STAs in ah Date: Authors:
Doc.: IEEE 11-14/1380r0 Submission Efficiency Measurement for RTS/CTS October 2014 B. Zhao and K. Yunoki, KDDI R&D LabsSlide 1 Date: 2014-10-30 Authors:

Doc.: IEEE 11-14/1380r0 Submission Efficiency Measurement for RTS/CTS October 2014 B. Zhao and K. Yunoki, KDDI R&D LabsSlide 1 Date: Authors:
Submission doc.: IEEE 802.11-12/1063r0 September 2012 Yasuhiko Inoue (NTT)Slide 1 Requirements on WLAN Cellular Offload Date: 2012-09-18 Authors:

Submission doc.: IEEE /1063r0 September 2012 Yasuhiko Inoue (NTT)Slide 1 Requirements on WLAN Cellular Offload Date: Authors:
Doc.: IEEE 802.11-12/0028r1 Submission January 2012 Anna Pantelidou, Renesas Mobile CorporationSlide 1 Power Saving Possibilities for Networks Supporting.

Doc.: IEEE /0028r1 Submission January 2012 Anna Pantelidou, Renesas Mobile CorporationSlide 1 Power Saving Possibilities for Networks Supporting.
Doc.: IEEE 802.11-12/0034r0 Submission NameAffiliationsAddressPhoneemail Hitoshi MORIOKAAllied Telesis R&D Center 2-14-38 Tenjin, Chuo-ku, Fukuoka 810-0001.

Doc.: IEEE /0034r0 Submission NameAffiliationsAddressPhone Hitoshi MORIOKAAllied Telesis R&D Center Tenjin, Chuo-ku, Fukuoka
Doc.: IEEE 802.11-10/0528r0 Submission March 2010 Slide 1 Slot Time Synchronization for Coexistence of 5 MHz, 10 MHz and 20 MHz Systems Date: 2010-05-11.

Doc.: IEEE /0528r0 Submission March 2010 Slide 1 Slot Time Synchronization for Coexistence of 5 MHz, 10 MHz and 20 MHz Systems Date:
Doc.: IEEE 802.11-10/1268r0 Submission November 2010 Minyoung Park, Intel Corp.Slide 1 Low Power Consumption Opportunity in Sub 1 GHz Date: 2010-11-08.

Doc.: IEEE /1268r0 Submission November 2010 Minyoung Park, Intel Corp.Slide 1 Low Power Consumption Opportunity in Sub 1 GHz Date:
Doc.: IEEE 802.11-11/0060r1 Submission January 2011 Minyoung Park, Intel Corp.Slide 1 Low Power Capability Support for 802.11ah Date: 2011-01-17 Authors:

Doc.: IEEE /0060r1 Submission January 2011 Minyoung Park, Intel Corp.Slide 1 Low Power Capability Support for ah Date: Authors:
Submission doc.: IEEE 11-11/1414r2 November 2011 Katsuo Yunoki, KDDI R&D LaboratoriesSlide 1 Probe Request and Response in TGai Date: 2011-11-02 Authors:

Submission doc.: IEEE 11-11/1414r2 November 2011 Katsuo Yunoki, KDDI R&D LaboratoriesSlide 1 Probe Request and Response in TGai Date: Authors:
Submission doc.: IEEE 11-13/0523r2 May 2013 Katsuo Yunoki, KDDI R&D LaboratoriesSlide 1 Understanding Current Situation of Public Wi-Fi Usage - Possible.

Submission doc.: IEEE 11-13/0523r2 May 2013 Katsuo Yunoki, KDDI R&D LaboratoriesSlide 1 Understanding Current Situation of Public Wi-Fi Usage - Possible.
Submission doc.: IEEE 11-13/0030r0 January 2013 Katsuo Yunoki, KDDI R&D LaboratoriesSlide 1 User Level Performance Date: 2013-01-07 Authors:

Submission doc.: IEEE 11-13/0030r0 January 2013 Katsuo Yunoki, KDDI R&D LaboratoriesSlide 1 User Level Performance Date: Authors:
Submission doc.: IEEE 11-13/1398r0 Nov 2013 Akira Yamada, NTT DOCOMO, Inc.Slide 1 Requirements for HEW Date: 2013-11-14 Authors:

Submission doc.: IEEE 11-13/1398r0 Nov 2013 Akira Yamada, NTT DOCOMO, Inc.Slide 1 Requirements for HEW Date: Authors:
Submission doc.: IEEE 802.11-15/1288r1 November 2015 K. Yunoki, KDDI R&D Labs.Slide 1 An issue of wider bandwidth operation at real denser environment.

Submission doc.: IEEE /1288r1 November 2015 K. Yunoki, KDDI R&D Labs.Slide 1 An issue of wider bandwidth operation at real denser environment.
Submission doc.: IEEE 11-13/1349r0 November 2013 Katsuo Yunoki, KDDI R&D Labs.Slide 1 Access Control Enhancement Date: 2013-11-08 Authors:

Submission doc.: IEEE 11-13/1349r0 November 2013 Katsuo Yunoki, KDDI R&D Labs.Slide 1 Access Control Enhancement Date: Authors:
Submission doc.: IEEE 11-13/1073r0 September 2013 Katsuo Yunoki, KDDI R&D LaboratoriesSlide 1 Access Control Enhancement Date: 2013-09-14 Authors:

Submission doc.: IEEE 11-13/1073r0 September 2013 Katsuo Yunoki, KDDI R&D LaboratoriesSlide 1 Access Control Enhancement Date: Authors:
Doc.: IEEE 802.11-12/0619r3 Submission May 2012 Haiguang Wang et. al, I2R, SingaporeSlide 1 Overlapping IEEE 802.11ah Networks of Different Types Date:

Doc.: IEEE /0619r3 Submission May 2012 Haiguang Wang et. al, I2R, SingaporeSlide 1 Overlapping IEEE ah Networks of Different Types Date:

Similar presentations

Ads by Google