GBO_007_E1_1 GSM Summary of Radio Network Planning-34
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Transcript of GBO_007_E1_1 GSM Summary of Radio Network Planning-34
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Summary of radio network planning
ZTE University
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Objectives
At the end of this course, you will be able to: Describe the contents and flow of site survey
State the basic principle of site selection
Master the using of site survey tools
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Contents
Site survey summary
Preparation of site survey
Working flow of site survey
Data audit and documents output Site survey tools
Site survey instances
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Function
Provide basic data for planning and imitation; Make planning more reasonable and reduce risk;
Reduce the cost of network
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Goals
Know the feature of field, landform andsubscribers, estimate the subscriber number and
traffic
Integrate coverage, traffic density, site condition
and cost
Output BTS site type, site location , distribution
and antenna configuration which satisfying
customers requirements. Make site survey of each site and prepare three
candidate sites for substitution
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Working flow
Single site record
Collection andcheck
Execution
Site surveyplanreparation
Rightdata?
Requirementanalysis
OutputSite surveyreportSite surveyreport
N
Y
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Contents
Site survey summary
Preparation of site survey
Working flow of site survey
Data audit and documents output Site survey tools
Site survey instances
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Requirement analysis
Target of network (coverage and capacity) Customers suggestion on site type (micro cell,
repeater, indoor coverage etc.)
Existing network situation of coverage area (site
distribution of other operators)
Working interface with customers
Schedule and resource of site survey
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Output of requirements analysis
Collect and analyze all the requirements formcustomer, combined with network planning and
site survey documents. Output report of
requirements analysis.
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Tools Function
necessary
GPS Altitude, latitude and longitude of BTS
Compass direction and environment
Digital camera photo the environment of site
ruler For measurement
vehicle One vehicle for each team
Notnecessary
map Digital map, scan map, paper map
Range finder Measure distancetelescope Increase sight scope
test equipment Test the coverage of site
Tools
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Site survey plan
According to the project and requirements report,make detail site survey plan, including goal,
organization, personnel, tools, schedule and
outputs.
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Contents
Site survey summary
Preparation of site survey
Working flow of site survey
Data process and documents output Site survey tools
Site survey instances
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Site survey flow
Site location
selection
Information
collection and
analyzing
Site adjust Not suitable
Cell parameters
design
Site survey
record table
end
startSite initial
information
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Site initial information
Latitude and longitude of sites from planning Site location provided by operators
The location of old substitute sites
Sites of other operators
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No. Common principle for site selection1 Site should be in the ideal position of honeycomb structure
2 The BTS density should match the traffic density
3 The height of BTS should lower then the highest building and higher thenthe average building
4 Avoid high buildings or potential blocking constructions, which may affectthe coverage
5 Avoid radio station, radar or other strong interference equipments
6 Avoid choose the top of hill or woods
7 Necessary condition for site building
8 Select the equipment rooms with little expansion cost or buildings with
less rent
9 Try to select the existing telecom station, micro wave station, so to reusethe power supply
10 The feasibility, cost and performance should be considered before themicrowave is used as transmission
11 Dual band sites should be at same site in urban area
Principle of site selection
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Information collection and analysis
Traffic distribution survey Traffic distribution in serving area
Economy level, average income and consumption
habits.
Forecast subscriber increase trend
Radio propagation environment survey
Location information of BTS (longitude, latitude, altitude)
Description of the overall environment
Description of barriers
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Cell parameter design
BTS type Site configuration
Antenna parameters
Antenna heightAzimuth
Tilt down angle
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Site survey record table
Altitude, longitude and precision of GPS Geographic description of BTS
Important area
Direction Transmission system
Repeater basic information
Co-site description
Picture of site
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Contents
Site survey summary
Preparation of site survey
Working flow of site survey
Data audit and documents output Site survey tools
Site survey instances
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Data audit and documents output
After the site survey, all the documents should becollected by team leader, who will pass them to
network planning technical manager
After check and audit, Network planning manager
will pass these documents to project manager.
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Check and audit
Check and audit from technical view, make surethe site survey result is true, accurate, reasonable
and feasible:
Fill up
If there is any questions about sites, communicate withcustomers and put it into MOU.
If the environments is not good for sites, suggestion
must be given to customers for improvement.
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Output report
After gather and audit, provide the followinginformation in the final report
BTS site survey reportChinese, English
Coverage area list
BTS site information list
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Contents
Site survey summary Preparation of site survey
Working flow of site survey
Data audit and documents output Site survey tools
Site survey instances
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GPS
Main indices Receive sensitivity
Navigation
Physical index
Power
Keys on panel
Power key
Turn page Input
Exit
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GPS
Basic operate power on, light, shut down
Automatic location
Location and navigation operation
Navigation on route
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GPS
Notes for longitude/latitude measurement GPS needs 3 satellites for location
The measurement mode is WGS84
The angle unit is degree
Try close to site to measure
Deviation compared with digital map
The precision of digital map
GPS measurement deviation The test spot is not same as planned
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Compass
Main function Direction and tilt down angle
Landform measurement: include orientation, slope
degree, fix level
Vertical angle
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1viewfinder 2Aim board
3Magnetic needle 4Horizontal
dial 5Vertical dial
6Vertical scale indicator
7Vertical level organ
8batholith level organ
9Magnetic needle fix helix
10thimble 11lever
12Glass cover
13Box and needle round board
Structure
Magnetic needle Horizontal dial
Vertical dial
Aim board Viewfinder
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Compass
Antenna direction Stand under the antenna or tower with instrument in
hand
Make the upper cover face you, aim board point to
antenna Wait for the needle stop, the degree of the needle N
pole is the direction of antenna.
Antenna tiltdown
Keep the compass close to the character surface ofantenna, and keep the bleb in the middle for some time
Read the degree, which represent the tiltdown angle of
this character surface.
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Contents
Site survey summary Preparation of site survey
Working flow of site survey
Data audit and documents output Site survey tools
Site survey instances
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Unreasonable location
BTS site close to high voltage cable Wrong: One BTS is close to a high voltage cable,
antenna is at the same level as power cable and the
distance to power cable is no more than 10 meters.
Right: move the BTS 50 meters away from the powercable for safety
BTS is on the hill in urban
In order to cover a city, a BTS is built on a hill with 300
meters high. As the BTS is so high that all the MS in this city can
receive the signal, which make other BTS traffic idle,
This site is congestion, and cause many MS fail to call.
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Unreasonable planning
Less BTS sites in dense urban area Total 29 frequencies available for one city, so only 5
sites were build.
Limited by frequency resources, there is no large
capacity sites which cant satisfy the traffic requirement. Solution: Another 8 new BTS sites were built to fit the
large traffic.
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