B04 WCDMA RNP Site Survey feature parameter description

B04 WCDMA RNP Site Survey feature parameter description

1. Wireless Curriculum Development SectionWireless Curriculum Development Section
ISSUEISSUE
OWJ101101 WCDMA RNP Site OWJ101101 WCDMA RNP Site
SurveySurvey
1.01.0

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 Site survey is the base of a mobile communication
network. So it is very important.
 On a mobile communication network as a whole,
whether an appropriate place has been selected for
a NodeB will affect not only its own coverage but
also the locations of all other NodeBs and even the
coverage of the entire network.
Review

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Radio network
nominal
planning report
Output SEARCH
RINGS
List of sites
Is it a 2G site
or not?
Is it a new site or
not (name prefix
NewSite)
Select candidate
sites
Can site conditions
be determined?
Site survey
Site survey
report
Frequency
scanning test
Frequency scanning
test report
Are site
requirements
satisfied or not?
Flow of Site SurveyFlow of Site Survey

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Objectives

Know how to select candidate
sites

Know the preparation of site
survey

Know how to survey sites

Know about the survey report
Upon completion of this course,you will be able to:

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Course Contents
Selection of Candidate Sites
Site Survey Preparation
Details of Site Survey
NodeB Site Survey Report

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
1.1 Precondition for the 1.1 Precondition for the
Selection of Candidate SitesSelection of Candidate Sites
1.2 Principles for the Selection
of Candidate Sites
1.3 Select Candidate Sites
Selection of Candidate Sites

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Precondition for the Selection of Candidate Sites
System Simulation Personnel provide the following materials
based on the nominal planning report prepared in the radio
network nominal planning phase:
Engineering Parameters Sheet
A topographic map or city map, contains the
BS topology information, antenna azimuth
information and coverage prediction information
Selection of Candidate Sites

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Precondition for the Selection of Candidate Sites

Ideal site location
Search Ring
1/8R
Typical 3-sector Search Ring
Selection of Candidate Sites

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1.1 Precondition for the
Selection of Candidate Sites

1.2 Principles for the Selection 1.2 Principles for the Selection
of Candidate Sitesof Candidate Sites
1.3 Select Candidate Sites
Selection of Candidate Sites

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Principles for the Selection of Candidate Sites
1. Fulfill requirements as specified in the
nominal planning report whenever possible
 Appropriate cell structure
 Antenna height requirement
 Installation environment requirements
 Ensure coverage of key areas
Selection of Candidate Sites

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Principles for the Selection of Candidate Sites
2.Do not select a location on a high
mountain in a urban or suburban area
3.Avoid environmental influence
high-power radio transmitter, radar
station, etc
4.Among buildings in a downtown area,
take advantage of building heights to
construct a layered network
5.Give consideration to negotiations on
candidate sites.
Selection of Candidate Sites

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1.1 Precondition for the
Selection of Candidate Sites
1.2 Principles for the Selection
of Candidate Sites

1.3 Select Candidate Sites1.3 Select Candidate Sites
Selection of Candidate Sites

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Select Candidate Sites
Candidate sites are usually supplied by third parties
based on the site requirements provided by Network
Planning Survey Personnel . A third party may be a
property agency.
Selection of Candidate Sites

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Course Contents
Selection of Candidate Sites
Site Survey Preparation
Details of Site Survey
NodeB Site Survey Report

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Preparation before Set-out
Collect project documents as below:
- Project documentation
- Network background
- Local map
- NodeB site Survey Form
- Contract Configuration List
- Existing network information
Site Survey Preparation

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Digital camera
GPS
Compass
Laptop computer
Map
Tape measure
Telescope Laser ranger
Preparation before Set-out :Tools
Site Survey Preparation

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Site Survey Coordination Meeting
Find out about the local electromagnetic environment and perform
frequency scanning tests if necessary.
Identify survey and cooperation personnel.
Prepare vehicles and equipment.
Develop a survey plan and identify the survey routes. If the area to
be surveyed is large, divide the personnel into several groups and
conduct surveys at the same time.
Develop initial solutions for power supply and transmission
systems, etc.
Obtain information on frequency bands, maximum transmit powers
as well as azimuth and down tilt of the existing co-site antennas.
Site Survey Preparation

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Course Contents
Selection of Candidate Sites
Site Survey Preparation
Details of Site Survey
NodeB Site Survey Report

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
3.1 NodeB Site and Surroundi3.1 NodeB Site and Surroundi
ng Environmentng Environment
3.2 Survey and Design of the
Antenna & Feeder System
3.3 Feeder Cable Selection
Details of Site Survey

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NodeB Site and Surrounding Environment
1.Take pictures of the site overview
2.Collect the latitude and longitude of the site
3.Surrounding environment
4.Roof information (If roof available)
Details of Site Survey

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NodeB Site and Surrounding Environment
Sample photos of surrounding Environment
Details of Site Survey

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NodeB Site and Surrounding Environment
PICTURE 1 PICTURE 2
PICTURE 3 PICTURE 4
Sample photos of surrounding Environment
Details of Site Survey

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Sample
drawing of
Roof infor
mation
NodeB Site and Surrounding Environment
Details of Site Survey

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3.1 NodeB Site and Surroundi
ng Environment

3.2 Survey and Design of the 3.2 Survey and Design of the
Antenna & Feeder SystemAntenna & Feeder System
3.3 Feeder Cable Selection
Details of Site Survey

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Survey & Design of the Antenna & Feeder System
1.Antenna type selection
2.Antenna height
3.Antenna azimuth
4.Antenna down tilt
5.Antenna installation and co-site antenna
isolation
6.Space diversity distance
7.Omni antenna installation requirements
Details of Site Survey

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Survey & Design of the Antenna & Feeder System
Antenna type selection
 in a urban area
 in a suburban area
 in a rural area
 along a highway
 in a mountainous area
 in a tunnel
 indoor
-For details, see remark for this page
Details of Site Survey

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Survey & Design of the Antenna & Feeder System
Antenna high
Heights of antennas for different cells of the same NodeB are allowed to
be different from one another.
In a plain urban area, the effective antenna height above the ground
should be within the range of 25m-30m.
For a NodeB in a suburban area, the effective antenna height above the
ground should be within the range of 40m-50m.
The antenna height of an isolated site should not exceed 70m.
If an antenna is too high, the signal level received from under the antenna
maybe very poor (so-called "blind under tower"). This phenomena is more
obvious in the case of an omni antenna.
Too high an antenna is likely to cause such problems as cross coverage
and intra/inter-frequency interference, which will degrade the network
quality.
Details of Site Survey

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Survey & Design of the Antenna & Feeder System
Antenna azimuth
Azimuth of antennas have been determined in the
nominal planning phase. During the site survey, we
should make adjustments of these azimuth
according to obstacles around the site to prevent
them from affecting the signal propagation.
-For details, see remark for this page
Details of Site Survey

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Survey & Design of the Antenna & Feeder System
Antenna down tilt
 The antenna tilting control the coverage and reduce intra-
system interference.
 Down tilt angles should be set in consideration of such factors
as the transmit power, antenna height, cell coverage and radio
propagation environment.
 The down tilt angle of an antenna should be determined
based on the actual condition to reduce interference on other
cells, ensure the coverage and avoid unnecessary blind areas.
 If the mechanical down tilt angle is too large, the horizontal
antenna pattern will be distorted.
Details of Site Survey

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Survey & Design of the Antenna & Feeder System
Antenna installation and co-site antenna isolation
-60° relative to
antenna azimuth
-60° relative to
antenna azimuth
+60°
+60° relative to
antenna azimuth
> 30°
<=30°
Antenna azimuth
Antenna
azimuth
WallWall
See remark
Details of Site Survey

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Survey & Design of the Antenna & Feeder System
Antenna installation and co-site antenna isolation
d
h

 = down Tilt
’ = guard angle
 = ( -10dB angle of vertical diagram)/2
To check: h/d=tg(α) with α=(ß+Γ+Γ’)
building
Directional
antenna
Shadow
zone
Details of Site Survey

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Survey & Design of the Antenna & Feeder System
Isolation of GSM900 antenna and UMTS antenna
　
890
MHz
902.5
MHz
915
MHz
935
MHz
947.5
MHz
960
MHz
1920
MHz
1950
MHz
1980
MHz
2110
MHz
2140
MHz
2170
MHz
0.5m 65dB68dB68dB71dB65dB 70dB55dB58dB 62dB49dB52dB62dB
1.0m 70dB72dB73dB71dB71dB 71dB57dB61dB 67dB62dB66dB63dB
1.5m 72dB71dB70dB69dB72dB 72dB65dB66dB 68dB57dB58dB60dB
2.0m 71dB73dB73dB69dB71dB 73dB71dB67dB 70dB58dB63dB63dB
Details of Site Survey

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Survey & Design of the Antenna & Feeder System
　
1710
MHz
1747.
5MHz
1785
MHz
1805
MHz
1842.5
MHz
1880
MHz
1920
MHz
1950
MHz
1980
MHz
2110
MHz
2140
MHz
2170
MHz
0.5m 63dB61dB 56dB62dB68dB 62dB51dB58dB60dB66dB57dB57dB
1.0m 62dB67dB 66dB67dB66dB 62dB54dB54dB68dB60dB55dB58dB
1.5m 63dB66dB 62dB61dB60dB 60dB59dB59dB58dB62dB66dB68dB
2.0m 70dB62dB 62dB67dB62dB 63dB60dB62dB61dB66dB69dB66dB
Isolation of DCS1800900 antenna and UMTS antenna
Details of Site Survey

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Survey & Design of the Antenna & Feeder System
Space diversity distance
space diversity distance(2--3m for wcdma)
actual installed distance
Note:
Details of Site Survey

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Omni antenna installation requirements
Survey & Design of the Antenna & Feeder System
The isolation distance between an omni antenna and tower
is required to be more than 2m, and the effective horizontal
diversity distance between omni antennas is required to be
more than 2m (3m is recommended).
Omni antenna should be perpendicular to the horizontal
plane.
Details of Site Survey

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36Omni antenna installation requirements
Survey & Design of the Antenna & Feeder System
Details of Site Survey

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3.1 NodeB Site and Surroundi
ng Environment
3.2 Survey and Design of the
Antenna & Feeder System

3.3 Feeder Cable Selection3.3 Feeder Cable Selection
Details of Site Survey

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If a feeder cable is longer than 50m, a 5/4'' feeder cable sho
uld be used; if it is shorter than 50m, a 7/8″ feeder cable sho
uld be used. 1/2″ feeder cables are used to connect the jum
pers between antennas and feeder cables as well as betwe
en feeder cables and cabinet-top connectors.
Feeder cables must not be over bent, and their external con
ductors should be well grounded。
Feeder Cable Selection
Details of Site Survey

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Course Contents
Selection of Candidate Sites
Site Survey Preparation
Details of Site Survey
NodeB Site Survey Report

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To avoid information errors due to failed memories,
identify problems of each candidate site in a timely
manner and develop a solution for them, the survey
personnel should output on site a XXX Project XXX Site
Survey Report for each site. The survey personnel should
then submit these data to the regional office and Network
Planning Dept. as well as to the Operator to be signed
and archived by the latter. All the items must be
completed and the signature field must be filled with the
signatures of survey personnel.
NodeB Site Survey Report

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