01-wcdma rnp and rno procedure_20051214

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UMTS RNP and RNO introduction

1.0

Internal Use

ObjectivesObjectives

Have the general idea about the RNP and RNO;

To know the typical RNP and RNO procedures;

Upon completion of this course,you will be able to:

Internal Use

Course ContentsCourse Contents

Brief Introduction

Dimensioning

Nominal planning

Cell planning

Optimization

Internal Use

Brief IntroductionBrief Introduction

Importance of RNP and RNO

Radio Access network is more expensive than others

Different area has different radio environments and customized solution is needed

Relationship between RNP and RNO

RNP take responsible for pre-sale period

RNO take responsible for post-sale period

RNP is more important than RNO

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Target of RNPTarget of RNP

Coverage Achieve the required radio coverage with specified probability

Capacity Meet the capacity requirements with acceptable block/delay

Quality Reach good QoS by linking the capacity and coverage

Cost Minimized the overall cost of the network

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Typical Procedure of RNP and RNO (1)Typical Procedure of RNP and RNO (1)

Main Task Sub-task

Preparation

maps (aero, digital, paper)

environment character survey

definition of coverage objectives

Geo database check

Geo database acquisition

Geo database validation

Geo database modification

integration in the planning tool

CW measurements campaign

measurement sites definition (position, height, etc..)

measurement sites acquisition

definition of drive route

Measurements (preparation, field test)

CW measurement post processing (filtering and averaging, report)

Propagation model calibrationpropagation model calibration

performance assessment

CW indoor measurements CW indoor measurements

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Main Task Sub-task

pre-engineering

definition of link budget

set up of new project in planning tool

definition of coverage thresholds for each RB

detailed analysis of the planning zone

dimensioning

setup of the site naming convention

availability of friendly sites

integration of friendly sites in the project

Nominal planning

definition and issue of search rings

RF Engineering

site survey

complete search document

start of site acquisition

first set of candidates returned from acquisition

ranking of candidates

site visits

check of drawings

3g simulation for clusters

final RNP report export

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Main Task Sub-task

Parameter PlanningSC planning

system and cell parameter planning, RNP related

Optimization

Scheme for Optimization

Drive Test

Drive Test Analysis

External Interference Measurement

Traffic Statistics Analysis

Worst Cell Analysis

Alarm Analysis

CDD Analysis

CDD Adjustment

Subscriber Complaint Analysis

H/W Configuration Changes

Optimization Result Confirm

Reports and Documentation

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Brief Introduction

Dimensioning

Nominal planning

Cell planning

Optimization

Internal Use

DimensioningDimensioning

The purpose of dimensioning is basically to give an evaluation of

the number of sites required in the planning zone in order to

reach the performances and capacity objectives for each service

to be deployed.

In this phase, the RF tool is usually not available, neither the

terrain nor the clutter databases.

Dimensioning tools can help us to decide the location of sites, but

not accurate enough comparing with RF planning tools.

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Assumptions for DimensioningAssumptions for Dimensioning

The assumptions for dimensioning are usually:

The planning area is covered with a hexagonal grid for each environment.

For roads, there is no hexagonal grid, but the approach takes into account cells face to face. Usually the length of the roads is divided by twice the cell range to find the required number of cells.

The cell range is defined for each environment or for the roads by the link budget of the limiting service in this environment (service with the smallest cell range)

The different environmentes generally considered are dense urban, urban, suburban and rural.

Normally, no tuned propagation model being available in this phase, the standard propagation model or COST231 Hata model is generally used

The sites are not positioned, only a global number of sites is given

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Dimensioning Chart FlowDimensioning Chart Flow

Information of the area to be covered DU ??km^2U ?? km^2SU ??km^2RA ??km^2HW ??km

Preplan the cellloading factor

Calculate the cell loading factor for a

specific environment on the basis of the

uplink load

Configure the service properly, such as service type, proportion,

density, and trend prediction

Uplink/downlink cell loading factor for the specific environment

Compare the cell loadingfactor and the preplanned

cell loading factor

Cell range

Yes: The capacity is restricted. Reduce

the cell range.

Smaller than the preplanned loading factor: The coverage

is restricted. Reduce the preplanned cell loading factor.

Apply the propagation model

COST231-HATA,...

Decide the cell range

Reach the allowed maximal configuration?

Larger than the preplanned cell loading factor

No: Add configuration (sectorization, carriers, …)

Decide the NodeB configuration

Decide the number of sites

Information of the area to be covered DU ??km^2U ?? km^2SU ??km^2RA ??km^2HW ??km

Preplan the cellloading factor

Calculate the cell loading factor for a

specific environment on the basis of the

uplink load

Configure the service properly, such as service type, proportion,

density, and trend prediction

Uplink/downlink cell loading factor for the specific environment

Compare the cell loadingfactor and the preplanned

cell loading factor

Cell range

Yes: The capacity is restricted. Reduce

the cell range.

Smaller than the preplanned loading factor: The coverage

is restricted. Reduce the preplanned cell loading factor.

Apply the propagation model

COST231-HATA,...

Decide the cell range

Reach the allowed maximal configuration?

Larger than the preplanned cell loading factor

No: Add configuration (sectorization, carriers, …)

Decide the NodeB configuration

Decide the number of sites

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Brief Introduction

Dimensioning

Nominal planning

Cell planning

Optimization

Internal Use

Nominal PlanningNominal Planning

Nominal planning is more detailed planning based on

dimensioning results.

In the nominal planning, all sites are positioned accurately in the

RF planning tool. The output is the nominal plan and the

theoretical specification for each site. Nominal planning is also

called pre-engineering phase and pre-design phase.

From the specification of theoretical sites, a search zone will be

defined and used as the input for site search.

Internal Use

Nominal Planning Chart FlowNominal Planning Chart Flow

Radio Network

Dimensioning

Di mensi oni ng Report

Contract

Initial sites choosing

System simulation

TargetSize

Phase No.

Available sites information

Site adjustment?

Y

N

Bidding Document

Sites importingPropagation

model

Nominal planning report(Including: search ring and

Theoretical site specification)

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Initial site choiceInitial site choice

Avai l abl e si te i nformati on

Si te I mport

Fi el d Survey Report

Regi on cl assi fi cati on

Model Tuni ng Report

Confi rm i nter-si te di stance

Candi date si tes

choosi ng/ new si tes addi ng

Coverage predi cti on

Si te adj ustment

Di scuss between Operator

and Vender

Fi el d Survey

CW test and

model tuni ng

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Constraints on site choiceConstraints on site choice

Performances objectives

The performance objectives are issued by the marketing. Together with the terrain and clutter characteristics, they will determine the inter site distance and antenna height.

Antenna Height

For each clutter, the RF planners must have an idea of the average clutter height so that the nominal sites antenna heights can be fixed..

Collocated sites

These sites may be collocated with 2nd generation network sites, to decrease the deployment time (e.g. by signing frame agreements with large real estate holders).

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Search Zone DefinitionSearch Zone Definition

Search zone in dense urban, urban, sub-urbanSites are placed at the nodes of a hexagonal grid. The grid must be adapted to the terrain and clutter of the area. Theoretical search ring radius:

Where R is the cell range and d is the inter site distance as defined below:

128

dRr

d

R

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Theoretical site specificationTheoretical site specification

The theoretical site specification is output during or at the end of the pre-

engineering phase. This, together with a search ring defined for each theoretical

site, is the input to site acquisition.

Examples for the Theoretical site specification:

Date of creation of the theoretical site, name of RF planner

Name of site (naming convention to be defined for the project)

Code of site (coding convention to be defined for the project)

Type of site: New site or Existing site (friendly site)

Address of the site if any and Theoretical site coordinates

Antenna: Heights, theoretical azimuths, type of antenna, length, width,

number of antenna per azimuth.

Coverage objective of the site in words: this, together with the map of

coverage, will help site acquisition to understand the objectives of the site.

The required room for the equipment (height, area on the ground,

etc…)

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Brief Introduction

Dimensioning

Nominal planning

Cell planning

Optimization

Internal Use

Cell PlanningCell Planning

The final RNP related cell engineering parameters and reports are the

export of cell planning. To achieve this:

First, we have to do site survey according to the nominal planning results

(search ring and Theoretical site specification) and verify and rank for each

sites.

Second, the confirmed sites should also be verified by simulation, to check

they satisfy the network targets or not.

Third, export the final report and results. This report will guide the

engineering construction.

Internal Use

Cell Planning Chart FlowCell Planning Chart Flow

Sati sfi ed target or

not?

Cel l Pl anni ng Report

Frequency cl earance

test

Frequency cl earance

Report

Nominal Planning Report

Si te Search

Candi date Ranki ng

System Si mul ati o

nN

Si te Val i dati on

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Site searchSite search

Once a candidate site has been spot, the site acquisition should gather all the information that will be required for thorough evaluation of the candidate site and finally the ranking of the candidate.

The criteria for evaluation are mainly:RF related (coverage & interference)Deployment (technical work required by the site, access to the site, lightning protection, etc..)Cost of the siteProbability of obtaining all the required authorizations for the site

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Candidate rankingCandidate ranking

The following criteria will be taken into account: RF ranking: coverage and interference ranking is the most important. The site should cover the objective it is designed for and at the same time interfere as little as possible with the other sites. For example, contrarily to GSM, high-rise candidate sites for UTRAN will be systematically rejected in order not to impair the traffic capacity.

Deployment ranking: several criteria linked to the practical sites deployment will have to be taken into account:

Site sharingRoom for equipment: BTS, antennaAvailability of energy supply and leased lineNegotiation aspect: what is the probability to obtain the lease for the siteEnvironmental aspects: what is the probability to obtain the agreement from the environmental authoritiesTotal cost of the site

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Site ValidationSite Validation

Choice of candidateRF: ideally the best candidate should be chosen. Negotiation: the site chosen must be negotiable for an acceptable price lease or buyable for a reasonable price and this, in a delay compatible with the project.Final choice: the validation of the chosen candidate site will be final after the technical visit.

Technical visitThe purpose of the technical visit is to grant the final validation for the candidate site. During this visit, the conformity of the site will be checked and the work to be done on the site evaluated. This visit is the final step before the site is build, so it must be accurate. The output of this technical visit will be a technical document giving detailed information on the work to be carried out on the site. This document will be the base to prepare the work planning on the site.

Internal Use


Brief Introduction

Dimensioning

Nominal planning

Cell planning

Optimization

Internal Use

OptimizationOptimization

Cluster of sites ready?

New Sites Integrated

Re-optimisationNeeded?

No

NoYes

RF Optimisation

Single Site Verification

Services Testing &Parameter Optimisation

Regular Reference RouteTesting & Stats Analysis

Yes

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Single site verification

The first phase of optimization involves functionality verification of

every new site.

The objectives of the single site verification are to ensure there are

no faults related to site installation or parameter settings.

single site verification test

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RF optimization

Once all the sites in a given area are integrated and verified, RF

(or Cluster) optimization could begin.

This refers to the main phase of optimization which aims at

optimizing coverage while in the same time keeping interference

and pilot pollution under control over the target area.

This phase also includes the verification and optimization of the

3G neighbor lists.

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Services Testing & Parameter Optimization

The different services should be field tested in order to assess the

performance and identify any need for specific parameter

optimization.

This testing should normally be conducted in areas of good RF

conditions in order to exclude any coverage issues. Such testing

does not need to be performed for each cell but the drive route

must include different clutter types and environments.

Internal Use


Regular Reference Route Testing & Stats Analysis:

Constant monitoring and evaluation of the network performance

will be required in order to identify any new issues that could arise,

for example, as a result of increase in traffic or changes in the envi

ronment.

Such monitoring can be based on field testing as well as network

stats analysis. Stats analysis could include, among others, various

triggers that indicate the need for network upgrade and expansion.

Results of the regular analysis may necessitate re-visits to the RF

optimisation and/or parameters’ tuning.

01-wcdma rnp and rno procedure_20051214

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