Doc. No. IEEE 11-13-0538-00-0hew-r2

Submission

May 2013

Klaus Doppler, NokiaSlide 1

Dense apartment building use case for HEW

Date: May 14, 2013Authors:

Name Company Address Phone email Klaus Doppler Nokia 2075 Allston Way, Berkeley, CA +1 510 4232 458 Klaus.doppler@nokia.com Sayantan Choudhury

Nokia

Esa Tuomaala Nokia Chittabrata Ghosh Nokia Mika Kasslin Nokia Jarkko Kneckt Nokia Janne Marin Nokia Prabodh Varshney Nokia Gabor Bajko Nokia

Doc. No. IEEE 11-13-0538-00-0hew-r2

Submission

Abstract

• Use case: Dense Apartment building

• Simulation results

• Input to 5 criteria

• Appendix

Slide 2

May 2013

Klaus Doppler, Nokia

Doc. No. IEEE 11-13-0538-00-0hew-r2

Submission

Mobile video drives mobile data traffic

• Video is dominant application

• Netflix in HD currently uses 7Mbps*

• Video is moving towards 4k (4x1080p) and 8k (16x1080p)

• Increasing shareof TVs with Wi-Fi support**

Slide 3 Klaus Doppler, Nokia

May 2013

* https://support.netflix.com/en/node/8731 ** 4 out of 10 top selling TVs on Amazon.com April 22, 2013

Doc. No. IEEE 11-13-0538-00-0hew-r2

Submission

May 2013

Klaus Doppler, NokiaSlide 4

Dense apartment building

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 requirements are: ~112Mbps per STA (16x1080P), delay is < 200ms, 1.0E-3 PER.

The application is able to buffer up to 2s of the content to avoid interruptions of the service, allowing relaxed delay requirements

Web browsing requirements for Social Networking are: ~20Mbps, PER 1e-3, delay<50ms, 1.0E-3 PER

150 active video users and 100 active web browsing users in the building with an aggregate data rate requirement of 18.8Gbps in the building.

The service requirements should be met for 98% of the users in the building.

Traffic ConditionsStrong interference from overlapping networks (neighboring apartments, and outdoor Wi-Fi network). Multiple video display are operational simultaneously.

Use CaseUser starts cloud video service on a fixed or mobile device with 8k display.

The cloud service streams the video in 8k format.

Doc. No. IEEE 11-13-0538-00-0hew-r2

Submission

Scenario

• Indoor environment

• Multi-floor building (100 apartments)

– 5 floors

– 2x10 rooms in each floor

– Room size:10m x 10m x 3m

• 1-100 AP in the middle of the room

• 2 STA/AP– Randomly placed in the same room as AP

• Constant Bit Rate traffic both DL and UL

– 10Mbps/10Mbps

• AP TxP 23dBm, STA TxP 16dBm

• One 20MHz channel @ 5GHz

Slide 5

May 2013

Klaus Doppler, Nokia

Doc. No. IEEE 11-13-0538-00-0hew-r2

Submission

Evaluation criteria

• Average user throughput– Averaged over all STA in building

• 5 Percentile of User Throughput Cumulative Distribution Function– 95% of STA in building have a higher throughput

May 2013

Klaus Doppler, NokiaSlide 6

Doc. No. IEEE 11-13-0538-00-0hew-r2

Submission

Results 10Mpbs/10Mbps

• Throughput drops fast if #active BSS higher than 10• Lowest 5% of users get less than 1Mbps if #active BSS higher than 17

Slide 7 Klaus Doppler, Nokia

20Mbps

Average User Throughput (Mbps)

5 percentile of user throughput CDF

20Mbps

May 2013

Doc. No. IEEE 11-13-0538-00-0hew-r2

Submission

Input for 5 criteria

• HEW shall achieve 2-3 times the average BSS throughput compared to 802.11ac in a multi-floor building with dense deployment of Wi-Fi networks

• HEW shall increase 4-10 times the 5 percentile of the user throughput Cumulative Distribution Function compared to 802.11ac in a multi-floor building with a dense deployment of Wi-Fi networks

May 2013

Klaus Doppler, NokiaSlide 8

Doc. No. IEEE 11-13-0538-00-0hew-r2

Submission

Appendix

Simulation scenario details

May 2013

Klaus Doppler, NokiaSlide 9

Doc. No. IEEE 11-13-0538-00-0hew-r2

Submission

Network topology and device locations

• Multi-floor building– 5 floors

– 2x10 room in each floor

– Room size:10m x 10m x 3m

• AP locations (assuming n APs):1. Randomly select n rooms in the

building

2. Place an AP in the middle of each selected room

3. Re-randomize for each simulation run

• STA locations:– In each room that has an AP, place two

STAs in random xy-locations (uniform distribution) at 1.5m above floor level

May 2013

Klaus Doppler, NokiaSlide 10

Doc. No. IEEE 11-13-0538-00-0hew-r2

Submission

Pathloss model

May 2013

𝐿ሺ𝑑ሻ= 𝐿𝐹𝑆ሺ𝑑ሻ= 20𝑙𝑜𝑔10ቀ4𝜋𝑑𝑓𝑐𝐶 ቁ 𝑓𝑜𝑟 𝑑≤ 𝑑𝐵𝑃 𝐿ሺ𝑑ሻ= 𝐿𝐹𝑆ሺ𝑑ሻ+ 35𝑙𝑜𝑔10ቀ 𝑑𝑑𝐵𝑃ቁ 𝑓𝑜𝑟 𝑑> 𝑑𝐵𝑃

where d is the xy-distance in meters and break point distance dBP is 5m. If i and j are on different floors, we further add floor attenuation factor according to the table below.**

Pathloss between antenna i and antenna j is calculated with the following formula*:

Total number of floors, Q

σ 𝐹𝐴𝐹𝑞𝑄𝑞=1 (dB) (dB)

1 12.9 7 2 18.7 2.8 3 24.4 1.7 4 27.7 1.5

* V. Erceg and et. al., TGn Channel Models, IEEE P802.11 Wireless LANs Std. IEEE 802.11-03/940r4, May 2004** S. Y. Seidel and T. S. Rappaport, “914 MHz path loss prediction models for wireless communications in multifloored buildings,” IEEE Trans. Antennas Propagat., vol. 40, no.2, pp. 207-217, Feb. 1992. (used in .11ah)

Note1: Distances below dBP considered LOS, above NLOS.Note2: Steeper slope after dBP includes the effect of indoor walls and no other wall attenuation factors are added.

Klaus Doppler, NokiaSlide 11

Doc. No. IEEE 11-13-0538-00-0hew-r2

Submission

Misc parameters and settings

• System: IEEE 802.11n

• Bandwidth: 20MHz

• Carrier frequency: 5GHz

• Traffic model

– Constant Bit Rate both uplink and downlink 10Mbps/user

• Generate a packet of 1000 bytes once every 0.8ms

• Antenna configuration

– 2x2

• Aggregation

– MPDU: max 20

– MSDU: max 2

May 2013

• RTS/CTS: off

• TxP

• AP 23dBm

• STA 16 dBm

• Block Acknowledgement: Enabled

• Link Adaptation: enabled

• CW

• AP max 511

• AP min 31

• STA max 1023

• STA min 63

• Access class Best Effort

• AIFSN

• AP 6

• STA 6

Klaus Doppler, NokiaSlide 12