doc.: IEEE 802.11-14/0328r1

Submission

Dense Apartment ComplexThroughput Calculations

Date: 2014-03

Authors:

Name Company Address Phone email Graham Smith DSP Group 1037 Suncast

Lane, Ste 112, El Dorado Hills, CA95762

916 358 8725 Graham.smith@dspg.com

Graham

Smith, DSP

Group

Slide 1

Mar 2014

doc.: IEEE 802.11-14/0328r1

Submission

– This presentation looks at the Dense Apartment scenario and calculates the throughputs

– First we look at the potential overlap situation – Then we look at channel selection schemes, random and intelligent.– We then determine the resulting apartment sharing – We then simulate the traffic per STA for every apartment and present the results

Background

Graham

Smith, DSP

Group

Slide 2

Mar 2014

doc.: IEEE 802.11-14/0328r1

Submission

3a Dense apartment building – private access and cellular offload

Pre-ConditionsEach apartment has Wi-Fi network deployed to access internet and cloud services. In each apartment up to 3 users stream concurrently video content from the network and up to 50% of the networks are active.

At the same time each of the active Wi-Fi networks is used by 2 users for web browsing

Environment Building with 100 apartments. One AP in each apartment of 10mx10m randomly positioned. 5 STA per AP randomly positioned in the apartment.

ApplicationsCloud based applications supporting video streaming with 8k resolution.

Video throughput assumptions are: ~112Mbps per STA, delay is < 200ms, 1.0E-3 PER. Online gameCloud-based application as big storage

Web browsing assumptions for Social Networking are: ~20Mbps, PER 1e-3, delay<50ms

150 active video users and 100 active web browsing users in the building.

Traffic ConditionsStrong interference from unmanaged overlapping networks (neighboring apartments, and outdoor Wi-Fi network).

Multiple video display are operational simultaneously.

Interference with Zigbee, Bluetooth.

Use CaseUsers watch the high quality video contents coming from the Internet or video contents stored in their PVR with VHD Display. There may be another video streams to be recorded in the Blu-ray deck.

People enjoy playing online games or local game machine with two or more people.

Other users are just accessing the Internet for email access, web browsing, etc.

Slide 3 Laurent Cariou (Orange)Graham

Smith, DSP

Group

Mar 2014

doc.: IEEE 802.11-14/0328r1

Submission

Dense apartment complex - Legacy

-60dBm -80dBm

-50dBm

-71dBm

-87dBm

-78dBm

-93dBm

-98dBm

-48dBm -75dBm -89dBm

-66dBm -82dBm

-81dBm

Signal Strengths of surrounding apartments

Same side Opposite side

13 Apartments within CCA 11 Apartments within CCA

24 Apartments within CCA

HEW Use Case model: 10 x 10 x 3m apartmentsWalls 12dB, Floors 17dB

20 Apartments per floor5 floors

Graham

Smith, DSP

Group

Slide 4

Mar 2014

doc.: IEEE 802.11-14/0328r1

Submission

Channel Selection (Channel and Overlap) vs Random

Graham

Smith, DSP

Group

Slide 5

0 1 2 3 4 5 6 720 10019 10013 96 410 68 329 53 44 36 10 46 36 83 1 0 6 56 10 12 7 8

# Apartments Overlapping Channel Selection Algorithm

CHANNELS OVERLAP

0 1 2 3 4 5 6 7 820 65 22 9 4 019 63 24 9 4 013 43 26 18 8 510 30 28 21 16 59 23 26 24 16 5 66 8 14 24 20 15 12 73 0 0 3 4 10 18 14 24 27

# Apartments Overlapping Random selection

CHANNELS OVERLAP

Mar 2014

doc.: IEEE 802.11-14/0328r1

Submission

2 x 20MHz or Share 40MHz?Does EDCA Overhead cancel out extra subcarriers?

Graham

Smith, DSP

Group

Slide 6

Mar 2014

doc.: IEEE 802.11-14/0328r1

Submission

Dense Apartment Complex – DSC

-60dBm -80dBm

-50dBm

-71dBm

-87dBm

-78dBm

-93dBm

-98dBm

-48dBm -75dBm -89dBm

-66dBm -82dBm

-81dBm

Signal Strengths of surrounding apartments

Same side Opposite side

5 Apartments within CCA 1 Apartments within CCA

6 Apartments within CCA

HEW Use Case model: 10 x 10 x 3m apartmentsWalls 12dB, Floors 17dB

20 Apartments per floor5 floors

Using DSC or TPC (with all devices reducing by 20dB)

0 120 10019 10013 10010 1009 1006 1003 83 17

OVERLAPCHANNELS

# Apartments Overlapping

Graham

Smith, DSP

Group

Slide 7

Mar 2014

doc.: IEEE 802.11-14/0328r1

Submission

Apartment Sharing

Graham

Smith, DSP

Group

Slide 8

Channels 40MHz 20MHz 2 x 20MHz 3 x 20MHz 4 x 20MHz 5 x 20MHz 6 x 20MHz 7x20MHz 8x20MHz20 10019 10013 96 410 68 329 53 45 26 10 58 323 0 1 0 6 56 10 12 7 8

# Apartments Channel BW with Channel Selection

Channels 40MHz 20MHz 2 x 20MHz 3 x 20MHz 4 x 20MHz 5 x 20MHz 6 x 20MHz 7x20MHz 8x20MHz 9x20MHz20 65 25 1019 63 27 1013 43 32 22 310 30 35 32 39 23 34 34 96 8 22 42 24 43 0 0 0 3 4 10 18 14 24 27

# Apartments Channel BW with Random Channels selection

Mar 2014

doc.: IEEE 802.11-14/0328r1

Submission

Apartment Sharing - DSC

Graham

Smith, DSP

Group

Slide 9

Tables show the number of apartments and the BW.

Channels 40MHz 20MHz20 10019 10013 10010 1009 1006 1003 82 18

# Apartments Channel BW with

Channels selection - DSC

Channels 40MHz 20MHz 2 x 20MHz 3 x 20MHz20 96 419 96 413 93 4 310 89 8 39 87 10 36 74 20 63 35 32 21 8

# Apartments Channel BW with Random Channels selection - DSC

Mar 2014

doc.: IEEE 802.11-14/0328r1

Submission

Throughput per STA - Sharing

Graham

Smith, DSP

Group

Slide 10

Mar 2014

Throughput per STA , Mbps

Sharing STA 1 STA 2 STA 3 STA 4 STA 5 STA 6 STA 7 STA 85 x 20MHz 4.28 3.42 4.43 3.92 4.98 3.56 3.91 6.024 x 20MHz 5.53 4.17 5.50 2.20 6.04 5.42 5.24 5.533 x 20MHz 6.19 9.27 6.85 6.47 5.84 5.08 8.26 9.242 X 20MHz 10.41 12.08 11.76 13.13 10.38 14.27 11.23 10.791 x 20MHz 22.48 26.37 22.83 27.651 x 40MHz 45.93 46.83 49.84 49.93

Sharing5 x 20MHz STA 9 STA 10 STA 11 STA 12 STA 13 STA 14 STA 15 STA 16 STA 17 STA 18 STA 19 STA 204 x 20MHz 2.65 5.85 3.92 4.27 5.36 4.58 5.12 3.30 4.84 3.90 4.20 4.613 x 20MHz 6.55 5.85 6.14 6.65 7.21 5.66 6.06 5.762 X 20MHz 8.70 10.04 7.50 7.58

Network 1 Network 2

Network 3 Network 4 Network 5

4 STAs per ApartmentAverage Throughput per STA AC_BE TP Mbps

Sharing PHY 32k agg40MHz 270 48.1320MHz 130 24.84

2 x 20MHz 130 11.763 x 20MHz 130 7.584 x 20MHz 130 5.595 x 20MHz 130 4.366 x 20MHz 130 3.57 x 20MHz 130 2.808 x 20MHz 130 2.189 x 20MHz 130 1.75

doc.: IEEE 802.11-14/0328r1

Submission

• We take the number of apartments in each sharing category and the throughput per STA for the sharing.– 4 STAs per apartment, AC_BE

• For example:– 10 CH Random Channel selection– 30 apartments have independent 40MH channel– 35 apartments have independent 20MHz channel– 32 apartments share a 20MHz channel with another apartment– 3 apartments share one 20MHz channel

Calculations

Mar 2014

Graham

Smith, DSP

Group

Slide 11

doc.: IEEE 802.11-14/0328r1

Submission

Results Total Throughput

Graham

Smith, DSP

Group

Slide 12

As would be expected, Channel Selection and DSC improve the total throughput

Mar 2014

doc.: IEEE 802.11-14/0328r1

Submission

DCF for 10 Channels

Mar 2014

Graham

Smith, DSP

Group

Slide 13

doc.: IEEE 802.11-14/0328r1

Submission

DCF for 9 Channels

Mar 2014

Graham

Smith, DSP

Group

Slide 14

doc.: IEEE 802.11-14/0328r1

Submission

DCF for 6 Channels

Mar 2014

Graham

Smith, DSP

Group

Slide 15

doc.: IEEE 802.11-14/0328r1

Submission

Results CDF (using average TP per STA)

Graham

Smith, DSP

Group

Slide 16

Mar 2014

doc.: IEEE 802.11-14/0328r1

Submission

Results CDF (using average TP per STA)

Graham

Smith, DSP

Group

Slide 17

Mar 2014

doc.: IEEE 802.11-14/0328r1

Submission

• When estimating the per STA throughput for the dense apartment complex, it is important to include the channel selection and the resulting apartment sharing scenario.

As expected, improvements to the throughput per STA occur with• Channel selection rather than random• DSC

Question is what do we use as the basis? Channel selection is recommended in 11aa.

Conclusions

Graham

Smith, DSP

Group

Slide 18

Mar 2014