01-Wcdma Rnp and Rno Procedure_20051214
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Transcript of 01-Wcdma Rnp and Rno Procedure_20051214
Huawei Confidential. All Rights Reserved
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
Internal Use
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
Internal Use
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
Internal Use
Typical Procedure of RNP and RNO (2)Typical Procedure of RNP and RNO (2)
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
Internal Use
Typical Procedure of RNP and RNO (3)Typical Procedure of RNP and RNO (3)
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
Internal Use
Course ContentsCourse Contents
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.
Internal Use
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
Internal Use
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
Internal Use
Course ContentsCourse Contents
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)
Internal Use
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
Internal Use
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).
Internal Use
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
Internal Use
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…)
Internal Use
Course ContentsCourse Contents
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
Internal Use
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
Internal Use
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
Internal Use
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
Course ContentsCourse Contents
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
Internal Use
OptimizationOptimization
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
Internal Use
OptimizationOptimization
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.
Internal Use
OptimizationOptimization
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
OptimizationOptimization
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.
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