GBO_007_E1_1 GSM Summary of Radio Network Planning-34

7/27/2019 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






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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



Data process and documents output Site survey tools



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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






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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





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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





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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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Documents

GBO_007_E1_1 GSM Summary of Radio Network Planning-34