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Wireless Site Survey - Example Report

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This is the example of the wireless site survey that belongs to netcentric students, UiTM

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									Wireless Site Survey
      Conducted by Mabrook Net. Engineers :
                Hazwani bte Mohd Mohadis
                       Juliza binti Mohamad
              Nurul Hidayah bt Ahmad Zukri
         Wan Nor Hazliza bt Wan Abdul Kadir
                       Abdul Hafiz Mohamd
                  Introduction
•   process of planning and designing a wireless network, in
    particular an 802.11 Wi-Fi wireless network

•   Cisco, 2008-first step in the deployment of a Wireless
    network and the most important step to ensure desired
    operation.

•   involves a site visit to run tests to
     – determine the presence of RF interference and
     – identify optimum installation locations for access
        points.

•   requires
     – analysis of building floor plans,
     – visual inspection of the facility, and
     – usage of site survey tools.
     – interviews with IT management and the end users of
       the wireless network
      Type Of Wireless Site Survey
•RF knowledge typically not understood deeply among network engineers

•WLANs have evolved
   -push to simplify deployment
   -easier for non-RF engineers to install and manage an RF WLAN
    network.
   -Part of this push has been in deployment tools/ site survey tools.

•Today there are three general categories for such tools, as described in the
  following sections:

 1) Manual
    Main method for determine how to deploy a WLAN.

     Being at the location and taking actual RF readings throughout
     the site.

     Using logical methods for working through the site, verify the
     coverage , an AP placed in the site with the associated antenna, and
     physical walkabout is performed.

     most accurate-provides real data transfer in a live environment in a
     manner similar to that of the actual WLAN user.

     results of the survey requires a high level of RF knowledge to
     understand
            Case Study
      Type Of Wireless Site Survey
    2) Automated and assisted
      Automated
•          study installing WLANs easier
    Duringmakeweek, there are tremendous numbers of UiTM
    students coming to PTAR to do their revisions as well as having
           concept of eliminating the necessity for a site survey
    free internet access.
          altogether is being promoted heavily

         network engineer could
                                       much less site, drop APs
• However, the conditions becomewalk into aconducive eachin
         the site based strictly on location and density of users,
  year as there is more students intake, which results in
         and have the network "self-configure."
  insufficient facilities being provided.
           Some automated survey vendors claim that APs that
           must be located (in the site) and configured manually
•   In fact, recent complaints show that the internet access service
           are bad.
    is very bad which depicted that network traffic of WLAN has
           The concept for the automated survey is
    been congested due to high bandwidth utilization. that just
          place APs wherever it makes sense to achieve the type
          of coverage desired coverage based on performance,
•         to overcome this resilience, and so on and standardize
    Thus, high availability, problem PTAR is considering expanding
          on one simple antenna.
    the WLAN coverage to the outside area of buildings to create a
         provides (Figure 1.0).
    new Wi-Fi hotspotsome ability to reconfigure the RF if the
          environment changes
  Type Of Wireless Site Survey
 Assisted
    Mix between a totally manual survey and a totally
      automated survey

     Take advantage of the best features from both

     Not suited for some sites due to lower RF coverage
      and the resulting higher cost of systems installed using
      automated or assisted survey methods

     Concept here is to take a manual survey process and
      determine optimum coverage in the site for each
      different type of area.

     Works in areas where the user density or application
      bandwidth requires the AP's coverage area be lower
      than the maximum capability of the AP and the areas
      to be covered are somewhat uniform
      Type Of Wireless Site Survey
3) Theoretical
  few companies have developed tools that provide theoretical RF
    coverage plans for WLANs.

  these tools are intended to remove the necessity for walkabout
   surveys

  input such as an scaled or scanned drawing of the site is required

  The site needs to have a description of the construction and
   contents, as well as the attenuation factors entered into the system,
   and specifics about the radios and antennas that are going to be
   used.

  offer features that keep complete and easy-to-use records of all
   technical and maintenance details for each job - most indoor and
   campus networks involve hidden APs and wiring that are not easy to
   find and can be lost over time, these graphical model documents can
   prove very useful for troubleshooting

  higher overall cost
    Purpose of Conducting Wireless
              Site Survey
•   Independent studies - most of the WiFi wireless networks installed
    today are not optimally designed or installed
•   many do not provide the service that they were intended to.
•   Many issues can arise which can prevent the radio frequency (RF)
    signal from reaching all parts of the facility.
•   Examples of RF issues include multipath distortion, hidden node
    problems, and near/far (distance) issues.
•   Besides, walls, doors, elevator shafts, people, and other obstacles
    offer varying degrees of attenuation, also could cause the RF (radio
    frequency) radiation pattern to be irregular and unpredictable.
•   A site survey helps :
     – define the contours of RF coverage in a particular facility.
     – discover regions where multipath distortion can occur, areas
         where RF interference is high and find solutions to eliminate
         such issues.
     – Cisco, 2008- determines the RF coverage area in a facility also
         helps to choose the number of Wireless devices that a firm needs
         to meet its business requirements .
     – tringent wireless site surveys, planning and design exercises are
         becoming essential, especially to support the new breed of
         wireless services such as Mobile VoIP and real-time location
         services.
               Case Study

Each semester, particularly during study week, there are
tremendous numbers of UiTM students coming to PTAR to do
their revisions as well as having free internet access.
However, the conditions become much less conducive each
year as there is more students intake, which results in
insufficient facilities being provided.


In fact, recent complaints show that the internet access
service is very bad which depicted that network traffic of
WLAN has been congested due to high bandwidth
utilization. Thus, to overcome this problem PTAR is
considering expanding the WLAN coverage to the outside
area of buildings to create a new Wi-Fi hotspot (Figure 1.0).
             Figure : Propose new WiFi Hotspot

In implementing this project, PTAR has hired engineers of Mabrook
Network Sdn Bhd to provide an extension of existing WLAN network
        by installing and configuring additional AP.
In brief, the PTAR management wants:

    To established new WiFi-hotspots outside of
   PTAR 3 and PTAR 4 for student’s convenience.

     To provide larger bandwidth and high-
   performance WLAN.

       Hence, this site survey is conducted to
provide us with all the information that our
engineers need to be able to gather the materials
and make the necessary adjustments to this
existing network.
                Objectives

Based on case study described in above, this site
survey is conducted to achieve the following
objectives:

1. To identify Access Point (AP) available in PTAR 3,
PTAR 4 and in between.

2. To analyze these AP’s signal strengths.

3. To propose new location of additional APs that
are required to provide stronger signals and wider
coverage of WLAN.
                    Case Study
                    Methodology

• During study week, there are tremendous numbers of UiTM
  students coming to PTAR to do their revisions as well as having
  There are 3 major subsequent procedures:
  free internet access.
    1. Gathering Pre-site Survey Information
    1. Gathering Pre-site Survey Information
• However, the conditions become much less conducive each
                                                       in
  year as there is more students intake, which results Software
  2.     Determining           Hardware      and
  insufficient facilities being provided.
  Requirements for Wireless Site Survey

  3. Defining Steps taken that the internet access service
• In fact, recent complaints showto Conduct Wireless Site
  Survey.
  is very bad which depicted that network traffic of WLAN has
  been congested due to high bandwidth utilization.

•    Thus, to overcome this problem PTAR is considering expanding
    the WLAN coverage to the outside area of buildings to create a
    new Wi-Fi hotspot (Figure 1.0).
1. Gathering Site Survey Information
                           Objectives
Most work orders or job assignments begin with a pre-site survey form being filled out
by one or more individuals, including the customer, IT staff, facilities personnel, and
application specialists.


 • To identify Access Point (AP) available in
Benefit of using this form is that it prompts those involved in completing the form to
consider all their potential WLAN needs and discover other potential networking
needs.
   PTAR 3, PTAR 4 and in between.
                      1. Customer Information

 • To measure and analyze these AP’s signal
   strengths.

 • To propose new location of additional
   APs that are required to provide stronger
   signals and wider coverage of WLAN.
2. Site Details
Figure 5.0: Components of Science and Technology Tower
                    Case Study
                    Methodology

• During study week, there are tremendous numbers of UiTM
  students coming to PTAR to do their revisions as well as having
  There are 3 major subsequent procedures:
  free internet access.
  1. Gathering Pre-site Survey Information
• However, the conditions become much less conducive each
                                                       in
  year as there is more students intake, which results Software
  2.Determining              Hardware         and
  2.Determining Hardware and Software Requirements
  insufficient facilities being provided. Survey
                      for Wireless Site
  Requirements for Wireless Site Survey

  3. Defining Steps taken that the internet access service
• In fact, recent complaints showto Conduct Wireless Site
  Survey.
  is very bad which depicted that network traffic of WLAN has
  been congested due to high bandwidth utilization.

•    Thus, to overcome this problem PTAR is considering expanding
    the WLAN coverage to the outside area of buildings to create a
    new Wi-Fi hotspot (Figure 1.0).
2. Determining Requirements
   for Wireless Site Survey
  5.2.1 Hardware Requirement:
  Laptop
         Model : Acer Aspires 4730ZG
         HDD : 250 GB
         RAM : 4GB DDR2
         Platform: Windows Vista

  Wireless LAN Adapter
          Ralink 802.11n wireless LAN card

  5.2.2 Software Requirement:
  1. Inssider
  2. VisiWave
                    Case Study
                    Methodology

• During study week, there are tremendous numbers of UiTM
  students coming to PTAR to do their revisions as well as having
  There are 3 major subsequent procedures:
  free internet access.
  1. Gathering Pre-site Survey Information
• However, the conditions become much less conducive each
                                                       in
  year as there is more students intake, which results Software
  2.Determining              Hardware       and
  insufficient facilities being provided.
  Requirements for Wireless Site Survey

       3. Defining taken that the to Conduct
  3. Defining StepsSteps taken internet access service
• In fact, recent complaints showto Conduct Wireless Site
  Survey.         Wireless Site Survey
  is very bad which depicted that network traffic of WLAN has
  been congested due to high bandwidth utilization.

•    Thus, to overcome this problem PTAR is considering expanding
    the WLAN coverage to the outside area of buildings to create a
    new Wi-Fi hotspot (Figure 1.0).
    Steps Taken to Conduct Wireless
•
              Site Survey
    With the purpose of conducting wireless site survey, we need to consider
    several steps and tips:

     1) Obtain facility diagram
      locate a set of building blueprints or city maps. If none are available,
         prepare a drawing that depicts the location of walls and walkways.Site
         survey tools import diagrams in various image formats. Of course
         mapping software is a good source for outdoor city surveys

     2) Determine AP location
      Then we need to determine where existing AP were located. We had
         identify one existing AP at ground floor PTAR 3 and one at ground floor at
         PATR 4

     3) Determine path to be taken when conducting site survey
      The paths that we took was at ground floor of PTAR 3 to PTAR 4

     4) Conducting site survey with VisiWave
      Installation of visiwave
      Learn how to use visiwave

     5) Gather and tabulate the data
      After that, the data which is depicted from point to point signal strength
         was gathered by VisiWave and tabulated

     6) Analyze the result
      The last step is to justify and analyze the data and identify influences of
         other components toward the wireless signal strength and provide
         suggestion on improving the efficiency of wireless coverage area
Site Survey Area
Signal Strength (Networked Access
        Points) - DAYTIME
Signal Strength (Networked Access
          Points) - NIGHT
                Access Point

Channel   MAC                 SSID               Location
1         00:1e:bd:67:85:53   uitmsalamstudent   PTAR 4
1         00:1e:bd:67:85:83   uitmsalamstudent   PTAR 3
             Case Study
  Results of Signal Strength
  • During study week, there are tremendous numbers of UiTM
    students coming to PTAR to do their revisions as well as having
    free internet access.

  • However, the conditions become much less conducive each
    year as there is more students intake, which results in
    insufficient facilities being provided.

  • In fact, recent complaints show that the internet access service
    is very bad which depicted that network traffic of WLAN has
    been congested due to high bandwidth utilization.

  •   Thus, to overcome this problem PTAR is considering expanding
     the WLAN coverage to the outside area of buildings to create a
10 Random Selected Points for Signal Strength (Day)
     new Wi-Fi hotspot (Figure 1.0).
Description of Random Points
     Objectives
      during Day-Time
• Totime taken for our daytime available in
The identify Access Point (AP) was allocated
  PTAR PTAR 4 till between.
between 3,3.00pm and in6.00pm. The path
initializes from Access Point 1 (A1) which is
situated inside PTAR 4 and it is terminated at
Access Point 2 (A2) which is situated inside
• To measure and analyze these AP’s signal
PTAR 3.
  strengths.

• To propose new location of additional
  APs that are required to provide stronger
  signals and wider coverage of WLAN.
10 Random Selected Points for Signal Strength (Night)
Description of Random Points
     during Night-Time

The time taken for our night-time was
allocated between 8.00pm till 10.00pm. The
path initializes from Access Point 1 (A1) which
is situated inside PTAR 4 and it is terminated
at Access Point 2 (A2) which is situated inside
PTAR 3.
Summarization of Results
      Data Comparison between Day and Night


• The strongest signal strength daytime is at checkpoint 3
  with -50dBm and it is located along the corridor near the
  elevator shaft on the PTAR 4 side. The weakest signal
  strength during daytime detected is located at checkpoint
  8 with -109dBm and the checkpoint is situated near a
  corner of two corridors between the PTAR 3 corridor and
  the foyer corridor.

• On the other hand, during night-time the strongest signal
  strength is at checkpoint 6 which is situated inside of
  PTAR 4 with the value of -45dBm. As for the weakest signal
  strength during night-time is located at checkpoint 6
  which is the same place as checkpoint 8 during daytime.
            ANALYSIS OF SIGNAL COVERAGE BASED ON WEATHER




A
                                           Daytime




                                         *Influence of Rainy Weather to the
                                         signal coverage during Night-Time




    Night               A
  ANALYSIS OF SIGNAL STRENGTH DAY AND NIGHT




                                 Daytime




                                *Influence of Day and Night to the
                                signal strength during Night-Time




Night
ANALYSIS OF SIGNAL COVERAGE BASED ON AP MOUNTING




      Worst Signal Strength Coverage area
   ANALYSIS OF SIGNAL STRENGTH BASED ON SIGNAL-TO-NOISE RATIO (SNR)




In comparison , inside PTAR 4 SNR is 55 but the outside SNR drop to 16.
        The signal strength also drop from -45 dBm to -84 dBm.
                            SNR = Psignal
                                      Pnoise
         ANALYSIS OF uitmshahalamstudent WI-FI CHANNEL BASED ON 2.4GHz BAND




                                AP1 Wi-fi Information




                             Wi-fi Channels in 2.4 Ghz Band



Most of the “Uitmsalamstudent” Wi-fi use channel 1. The coverage from this
channel is low and it only covers small area. Channel 1 uses 2.401 GHz until
2.423 GHz of channel width where this channel can only support short range area.
As we proposed, they can use channel 6 or 11 which is stronger compare to the
channel 1.
             Recommendation
•   Have a clear understanding of the areas where
    users will require access to the wireless LAN.



    ~This helps you scope out the coverage needed
    from the access points and where you should
    place them.

•   position an access point closer or within the
    applicable area, which could then require the
    addition of another access point to cover an
    adjacent portion of the facility.

•   our recomendation area to allocate an access
    point to recover PATR 3,PTAR 4 and in between
    as shown in the figure 1.0 and 1.1 below:
 Our selected place to
allocate an access point
   in order to recover
PTAR 3, PTAR 4 and in
        between.
New access
  point
•   Think about configuration attributes, such as
    signaling method (i.e., 802.11a, 802.11b or
    802.11g), transmit power and antenna type.
    ~affect range

•   Performance requirements provide some insight
    into placement. If users need 11Mbps throughout
    the facility, access points will need to be close
    together (e.g., 100 feet).

•   Facility construction plays a role in positioning of
    access points as well.

•   choose a location that enables the access point
    antenna to have maximum line-of-sight with the
    users.

•   Locate the router(AP) off the floor and away from
    walls and metal objects (for examples metal file
    cabinet, ellevator with thick metal wall.
•   you should mount the access points (more
    importantly the antennas) as high as possible,
    unless there are obstructions. The higher vantage
    point increases the horizontal range of the RF
    signal.

•   If policies dictate that WLAN hardware must be
    completely out of sight, then you'll probably need
    to mount the access points above the ceiling.

•   Some applications, especially those requiring
    support for a large density of users and high
    throughput, need a large number of access points
    in a relatively small area.
             Conclusion

•   From conducting the survey, we could generate an
    efficient WLAN network by improving the connection
    speed, coverage area and so on.

•   Having an efficient WLAN Network is important in
    order for students and lecturers within building of
    PTAR 3, PTAR 4 and in between have a better
    enviroment and can cover hotsport area.
                  Criticism

•   Problem to download Vistumbler software from
    the internet.

•   Visiwave quite easy to use, but we need to
    convert the scale into meter.

•   We can improve our site survey by searching and
    having more reference meterials about other
    technologies or applications in order to provide
    ourselves with a more dynamic precision in
    conducting wireless site survey.

								
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