doc.: IEEE 802.11-14/0328r0

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 802.11-14/0328r0

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 802.11-14/0328r0

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 802.11-14/0328r0

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 802.11-14/0328r0

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 802.11-14/0328r0

Submission

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

Graham

Smith, DSP

Group

Slide 6

Mar 2014

doc.: IEEE 802.11-14/0328r0

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 802.11-14/0328r0

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 802.11-14/0328r0

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 802.11-14/0328r0

Submission

Average Throughput per STA - Sharing

Graham

Smith, DSP

Group

Slide 10

4 STAs per Apartment each STA at full throughput AC_BETP Mbps

Sharing PHY 32k agg40MHz 270 48.120MHz 130 25.1

2 x 20MHz 130 11.93 x 20MHz 130 7.614 x 20MHz 130 5.595 x 20MHz 130 4.326 x 20MHz 130 3.57 x 20MHz 130 2.7958 x 20MHz 130 2.169 x 20MHz 130 1.75

3 Networks sharing one 20MHz channel12 STAs total. Each STA TP is 7.61Mbps

Mar 2014

doc.: IEEE 802.11-14/0328r0

Submission

Throughputs per STA vs Channels

Graham

Smith, DSP

Group

Slide 11

Channel SelectSTAs 100

TP /STA 25.1STAs 100

TP /STA 25.1STAs 96 4

TP /STA 25.1 11.9STAs 68 32

TP /STA 48.1 25.1STAs 53 45 2

TP /STA 48.1 25.1 11.9STAs 10 58 32

TP /STA 48.1 25.1 11.9STAs 1 0 6 56 10 12 7 8

TP /STA 11.9 7.61 5.59 4.32 3.5 2.795 2.16 1.75

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Combining the # apartments sharing and the throughputs

Mar 2014

doc.: IEEE 802.11-14/0328r0

Submission

Throughputs per STA vs Channels

Graham

Smith, DSP

Group

Slide 12

Random Channel SelectSTAs 65 25 10

TP /STA 25.1 11.9 7.61STAs 63 27 10

TP /STA 25.1 11.9 7.61STAs 43 32 22

TP /STA 25.1 11.9 7.61STAs 30 35 32 3

TP /STA 48.1 25.1 11.9 7.61STAs 23 34 34 9

TP /STA 48.1 25.1 11.9 7.61STAs 8 22 42 24 4

TP /STA 48.1 25.1 11.9 7.61 5.59STAs 3 4 10 18 14 24 27

TP /STA 7.61 5.59 4.32 3.5 2.795 2.16 1.75

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9

Mar 2014

doc.: IEEE 802.11-14/0328r0

Submission

Throughputs per STA vs Channels - DSC

Graham

Smith, DSP

Group

Slide 13

DSC and Channel SelectSTAs 100

TP /STA 25.1STAs 100

TP /STA 25.1STAs 100

TP /STA 25.1STAs 100

TP /STA 48.1STAs 100

TP /STA 48.1STAs 100

TP /STA 48.1STAs 82 18

TP /STA 25.1 11.9

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3

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DSC and Random Channel SelectSTAs 96 4

TP /STA 25.1 11.9STAs 96 4

TP /STA 25.1 11.9STAs 93 4 3

TP /STA 25.1 11.9 7.61STAs 89 8 3

TP /STA 48.1 25.1 11.9STAs 87 10 3

TP /STA 48.1 25.1 11.9STAs 74 20 6

TP /STA 48.1 25.1 11.9STAs 35 32 21 8

TP /STA 25.1 11.9 7.61 5.59

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We can now calculate the throughput results

Mar 2014

doc.: IEEE 802.11-14/0328r0

Submission

Results Total Throughput

Graham

Smith, DSP

Group

Slide 14

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

Mar 2014

doc.: IEEE 802.11-14/0328r0

Submission

Results CDF

Graham

Smith, DSP

Group

Slide 15

Mar 2014

doc.: IEEE 802.11-14/0328r0

Submission

Results CDF

Graham

Smith, DSP

Group

Slide 16

Mar 2014

doc.: IEEE 802.11-14/0328r0

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 17

Mar 2014