site survey verification mah 4_5 - verifier… · addpro ab has conducted a site survey...

Site Survey Verification MAH

Dokumentnamn: Site Survey Verification MAH

Dokumentansvarig: Martin Johansson

Version: 1.0

Klassificering: Externt

Utgivningsdatum: den 18 mars 2013

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AddPro | www.addpro.se

Malmö: 040-59 24 00 | Stockholm: 08-555 366 00 | Göteborg: 031-89 04 00

Helsingborg: 042-25 06 60 | Kalmar: 0480-296 56 | Örebro: 019-761 45 00 | Kristianstad: 044-781 42 00

Index

1 . Introduction ................................................................................................................................3

1.1 Contact Information ........................................................................................................................................ 3

1.2 Scope of Survey ............................................................................................................................................... 3

1.3 Validity ............................................................................................................................................................. 3

2 . Report .........................................................................................................................................4

2.1 Coverage .......................................................................................................................................................... 4

2.2 Signal Strength vs. Signal to Noise ration – S/N .............................................................................................. 5

3 . Notes ..........................................................................................................................................6

3.1 Signal Strength ................................................................................................................................................. 6

3.2 Signal to Noise ratio......................................................................................................................................... 6

3.3 Spectrum ......................................................................................................................................................... 6

3.4 Number of AP .................................................................................................................................................. 6

3.5 Interference ..................................................................................................................................................... 6

3.6 Other WLAN..................................................................................................................................................... 6

3.7 Possition of AP ................................................................................................................................................. 6

4 . Summary .....................................................................................................................................7

5 . Document Information ...............................................................................................................8

5.1 Version ............................................................................................................................................................. 8



Version: 1.0



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AddPro AB has conducted a Site Survey Verification of floor 4 in the building Orkanen held by Malmö Hög-

skola to review the changes made in accordance with the Site Survey performed during the summer of 2012.

This report is to compare the WLAN based on the same prerequisite as the last report and conclude the re-

sult.

This Site Survey was performed by:

Martin Johansson

AddPro AB

Stenbärsgatan 6

21231 Malmö

[email protected]

+46736255321

Site Survey is a method used to collect data from present Wi-Fi Access Point to determine coverage, signal to noise ratios, co-channel interference and Access Point placements in the existing Wi-Fi Environment. Spec-

trum analysis is a tool to identify none 802.11 interferences caused by other equipment or environment.

The validity of this report is based on todays and the days of the site surveys current situation. If there is any changes made to current environment or infrastructure it could affect the conclusions of this report and

must so be taken into account.

1 Introduction

1.1 Contact Information

1.2 Scope of Survey

1.3 Validity



Version: 1.0



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Attached below is 2,4Ghz and 5.0 GHz showing the current (date of survey) coverage.

2,4 Ghz

5,0 Ghz

2 Report

2.1 Coverage



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Below is the current (date of site survey) S/N ratio.

2,4 Ghz

5,0 Ghz

2.2 Signal Strength vs. Signal to Noise ration – S/N



Version: 1.0



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The signal strength is now between 35 and 65 dBi throughout 98% of the floor which is to consider nominal.

The Signal to Noise ratio is now between 30 and 55 dBi throughout 95% of the floor which is good.

None 802.11 RF disturbances were not measured during this survey as the area remain unchanged regarding

installation of other systems or products that could interfere.

The number of Aps has been increased by about 25-30% compared to before. Overall the AP count is high in

my experience for covering this area. The Signal Strength of this model of AP is lower than, from what my

experience gives, one would expect requiring an increase in Access Points.

The interference has increased as a toll for adding sufficient coverage to all parts of the floor. This will pro-

vide slower overall throughput but in this case is necessary to provide sufficient coverage to the area.

There is still an ESSID present on Floor 5 called “Perspective Free WiFi” that is provided by another set of APs

from another manufacturer. This contributes a lot to Co-Channel interference especially since its communi-

cation is on odd channels as Channel 4 and Channel 13 which is not recommended. See Signal Strength from

this WLAN below:

All AccessPoints are changed to be mounted in accordance with best practice for signal propagation. This

meaning the position, height and direction of the AP.

3 Notes

3.1 Signal Strength

3.2 Signal to Noise ratio

3.3 Spectrum

3.4 Number of AP

3.5 Interference

3.6 Other WLAN

3.7 Possition of AP



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It is my opinion that under the current circumstances the Wireless LAN at floor 4 Orkanen Malmö Högskola

is planned in accordance with Best Practice of Wireless regardless of choice in manufacturer if disregarding

the WLAN with ESSID “Perspective Free WiFi”. The survey shows that recommended levels regarding Signal

Coverage and S/N ratio are meet. The amount of APs required to provide adequate coverage is higher than I

expected comparing my experience using other product vendors. The amount of APs is also higher then

when customer upgraded from their old 802.11b/g network even tough 802.11n is considered to provide

atleast the same or better range as it uses MIMO technology.

4 Summary



Version: 1.0



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Version Description Author Date

1.0 First version Martin Johansson 2013-03-18

5 Document Information

5.1 Version

site survey verification mah 4_5 - verifier… · addpro ab has conducted a site survey...

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