11 cdma planning procedure-45

8/8/2019 11 CDMA Planning Procedure-45

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CDMA RF Planning Unit 1

CDMA Wireless Network Planning Process

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Main Content

Reasons for Network Planning

Aim of Network Planning

Steps in Network Planning

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Reasons of Network Plan

Coverage varies with the followingparameters

System loading

Velocities of mobile users

Data rateBoundary of soft handoff is variable

Complexity of the practical system

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Main Content


Aim of Network PlanningSteps in Network Planning

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Aim of Network Plan

Best possible coverage in the service areas

Forecast traffic distribution precisely, design thebest possible Base Station topology

Optimal system parameters for best Quality of

ServiceFewest equipment and lowest cost whencapacity and QOS requirement are met

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Main Content


Aim of Network Planning


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Pre-research

of Project

Requirement

Analysis

Survey of

Provided

Sites

Reduce

Process

Network

Evaluation

Wireless

Environment

Test

Site

Distribution

Design

Survey

ReportSubmission

Site Survey

Network Plan

Simulation

PN and

NeighborPlanning

Wireless Plan

Report

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d


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Pre-research

of Project

Requirement

Analysis

Survey of

Provided

Sites

Reduce

Process

NetworkEvaluation

WirelessEnvironment

Test

SiteDistribution

Design

Survey

Report

Submission

Site Survey

Network Plan

Simulation

PN and

Neighbor

Planning

Wireless Plan

Report

Pre-Research of Project

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Examine the content and acceptance

standards of the project contract

Conduct survey of the

environment of the project site, if

necessary

Amend the items of the contract

that cannot be realized

Pre-Research of Project

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Requirement Analysis

Pre-research

of Project

Requirement

Analysis

Survey of

Provided

Sites

Reduce

Process

NetworkEvaluation

WirelessEnvironment

Test

SiteDistribution

Design

Survey

Report

Submission

Site Survey

Network Plan

Simulation

PN and

Neighbor

Planning

Wireless Plan

ReportUnRegis

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Determine the detailed customer requirementfor the network

Survey the status of the existing network and

find out the development plan

Forecast both the short-term and long-termtraffic demand

Clarify and establish the acceptance standards

Investigate the wireless propagationenvironment (such as topography &

physiognomy)

Verify the traffic distribution


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Topography &physiognomy

Population distribution

Coverage demand

Wireless frequencyoccupation

Strategy for developingsubscribers

Information of providedsites

Traffic distribution

Demand of systemparameters

Special demand

OUTPUT:

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Demand Analysis - Two key points

Coverage demand

(Coverage boundary)

Traffic demand

(Important area)Un

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Survey of Provided Sites

Pre-research

of Project

Requirement

Analysis

Survey of

Provided

Sites

Reduce

Process

Network

Evaluation

Wireless

Environment

Test

Site

Distribution

Design

Survey

ReportSubmission

Site Survey

Network Plan

Simulation

PN and

NeighborPlanning

Wireless Plan

Report

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Survey of Provided Sites

Collect information about the wirelesspropagation environment of the provided

sites.

In case these sites meet the topological

structure of the network and the users'needs, try to make these provided sitesworkable to reduce investment

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Reduce Process

Pre-research

of Project

Requirement

Analysis

Survey of

Provided

Sites

Reduce

Process

NetworkEvaluation

WirelessEnvironment

Test

SiteDistribution

Design

Survey

Report

Submission

Site Survey

Network Plan

Simulation

PN and

Neighbor

Planning

Wireless Plan

ReportUnRegis

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Reduce Process

According to the analysis report of therequirement and sites survey result, decide

suitable procedure of the project.

Some following Working content might be cut

down after this stage.

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Network Evaluation

Pre-research

of Project

Requirement

Analysis

Survey of

Provided

Sites

Reduce

Process

NetworkEvaluation

Wireless

Environment

Test

Site

Distribution

Design

Survey

Report

Submission

Site Survey

Network Plan

Simulation

PN and

Neighbor

Planning

Wireless Plan

ReportUnRegis

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Carry out some tests to

evaluate customer's existing

network, and according to the

result plan the network

construction for the next stage.

Network Evaluation

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Wireless Environment Test

Pre-research

of Project

Requirement

Analysis

Survey of

Provided

Sites

Reduce

Process

NetworkEvaluation

Wireless

Environment

Test

Site

Distribution

Design

Survey

Report

Submission

Site Survey

Network Plan

Simulation

PN and

Neighbor

Planning

Wireless Plan

ReportUnRegis

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Wireless Environment Test

Scan the planned

coverage area to make

sure the frequency

spectrum is clean

Perform correction of the

propagation model by CWT(continuous wave transmitter)

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Spectrum Scanning

Interference with wide bandwidth and 3dB more than the thermalnoise will provide strong interference with CDMA system

Narrowband Interference

Broadband InterferenceUnRegis

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Site Distribution Design

Pre-research

of Project

Requirement

Analysis

Survey of

Provided

Sites

Reduce

Process

NetworkEvaluation

Wireless

Environment

Test

Site

Distribution

Design

Survey

Report

Submission

Site Survey

Network Plan

Simulation

PN and

Neighbor

Planning

Wireless Plan

ReportUnRegis

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Site Distribution Design

Set up the BStopology according tothe results of the link

budget and capacitycalculations. Theexisting sites shouldbe used as much aspossible.

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Link budget

Determine maximum path lossallowed

Determine maximum cell radius

Downlink and uplink

Keep balance

uplink

downlink

Mobile BTSCableloss

Antennagain

Pathloss

Antennagain

Cableloss

Margin

building

Margin slow fade + penetrationloss+...

Link budget

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Capacity LimitedCall drop ratio rise

Difficult To Access

Voice quality drop

Capacity Calculation

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Blue represents 1 pilot

Green represents 2 pilot

Yellow represents 3 pilot

Ideal Topology

Red represents 4 pilot or moreWhite represents no pilot coverage

Legend:

Unideal Topology

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Site Selection Principles

The density layout of BTS should beaccording to the traffic densitydistribution

Coverage of important users and

dense areas should be guaranteedChoose existing telecom centerbuildings or microwave sites ifpossible

Perform simulation to verify pilot

pollution areas and blind spots

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Pilot Pollution and Blind Spots

The uneven distribution ofsites can cause pilotpollution to some extent.These topographical surfacefeatures (such as hills, highbuildings, etc..) bring a lot of

reflection and obstruction.Reflection causes pilotpollution while obstructioncauses blind spotsWhen we try to clear up oneblind area, usually somepilot pollution area produced.

Or when we try to clear upone pilot pollution area,some blind area produced.U

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Site Survey

Pre-research

of Project

Requirement

Analysis

Survey of

Provided

Sites

Reduce

Process

NetworkEvaluation

Wireless

Environment

Test

Site

Distribution

Design

Survey

Report

Submission

Site Survey

Network Plan

Simulation

PN and

Neighbor

Planning

Wireless Plan

ReportUnRegis

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Site Survey Principles

Final site location may deviate by no more than1/4 of the cell radius from the initial location

Convenient traffic, reliable electricity, safeenvironment should also be considered

Avoid high building obstructions, avoid strongwireless transmitter, radar or other seriousinterference

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Avoid obstruction near the site

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Avoid gorge wave-guide effectin narrow street

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Site Survey Result

Cell sites may be moved, and cellconfiguration and directions may bemodified according to the site survey result

The sites are distributed evenly ,andaccord with traffic density distributionU

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Survey Report Submission

Pre-research

of Project

Requirement

Analysis

Survey of

Provided

Sites

Reduce

Process

NetworkEvaluation

Wireless

Environment

Test

Site

Distribution

Design

Survey

Report

Submission

Site Survey

Network Plan

Simulation

PN and

Neighbor

Planning

Wireless Plan

ReportUnRegis

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Find out the customer's

suggestion on the preliminarily

selected planning sites, andsubmit the report.

Survey Report Submission

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Network Plan Simulation

Pre-research

of Project

Requirement

Analysis

Survey of

Provided

Sites

Reduce

Process

NetworkEvaluation

Wireless

Environment

Test

Site

Distribution

Design

Survey

Report

Submission

Site Survey

Network Plan

Simulation

PN and

Neighbor

Planning

Wireless Plan

ReportUnRegis

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Network Plan Simulation

Carry out simulation to verify the wirelessplanning and design.

Guarantee the plan to meet the customer'sdemand .

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Rx Power Forward Link

Pilot Coverage Forward LinkB A

B

H

LH

B

B

G

F

H

B

H

GB

A

H

B

F

F

B

F

H

B

F

K

FB

F

Tx Power Reverse Link

Simulation Result

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PN and Neighbor Planning

Pre-research

of Project

Requirement

Analysis

Survey of

Provided

Sites

Reduce

Process

Network

Evaluation

Wireless

Environment

Test

Site

Distribution

Design

Survey

ReportSubmission

Site Survey

Network Plan

Simulation

PN and

NeighborPlanning

Wireless Plan

Report

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PN and Neighbor Plan

Allocate PN offset

index to different cells.Determine available

PN and reserve PN

Determine neighborsfor each cell

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Wireless Plan Report

Pre-research

of Project

Requirement

Analysis

Survey of

Provided

Sites

Reduce

Process

Network

Evaluation

Wireless

Environment

Test

Site

Distribution

Design

Survey

ReportSubmission

Site Survey

Network Plan

Simulation

PN and

NeighborPlanning

Wireless Plan

Report

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Wireless Plan Report

Wireless network planning and design offerinformation for the following stage, construction

of the project.

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Thank You!

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11 cdma planning procedure-45

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