ITU / BDTBDT- COE workshop
Bangkok, Thailand,
11 – 15 November 2002
Network Planning
Lecture NP
NP-- 5.1
Supporting Network Planning Tools
November 14th
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 1
BDT - COE workshop on Network
Planning
Module 1: Introduction and Experiences in the Region
Module 2
Role of Network Planning in the current Telecom scenario
Module 3
Integrated Planning Process
Module 4
Specific Network Planning per Layer
Module 5
Supporting Network Planning Tools
November 14th
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 2
Content Chapter 5.1
Network Planning Tools
• Objectives and classification for the different tool types
• Overall techno-economical evaluation
• Network design and optimization
• Network evaluation and simulation
• Tool mapping per class
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
November 14th
Lecture NP - 5 .1 - slide 3
Network Planning
Strategic view: Network Layer Modeling
IP
SMP
SMS-C
SCP
Service and Control level
Voice Mail
IN
HLR/AuC TSC
EIR
BTS
SSP
TEX
MSC
SSP
BSC
Functional level
Int’l
POP/LEX
WLL/Mobile
POP/LEX
Fixed NB network
DATA/IP
network
LL network
Transport/SDH
Infrastructure and Cable level
November 14th
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 4
Planning Methodology:
Integrated Iterative Planning Process
Analysis of
Initial Context
Business
Assessments
Generation
of
Competitive
Scenarios
(Inputs)
Traffic Demand
Forecasting
Network Design
& Configuration
Business &
Financial Planning
Technical
and
Economic
Results
(Outputs)
Procedures and Tools
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
November 14th
Lecture NP - 5 .1 - slide 5
Network Planning Tools:
Tool categories by coverage and detail
Network Design and Optimization
Detailed Design and Configuration
+ Network coverage
+ Level of detail
Overall techno-economical evaluation
Analysis and Simulation
November 14th
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 6
Network Planning Tools :
Tool categories by coverage
Overall technoeconomical
evaluation
Multilayer,
Multitechnology
Optimization
Detailed Design and
Configuration
Network coverage
Level of detail
Design and
Specific methods for given
Network segment, and/or
Technology
Detailed alghorithms for
a given system family
Analysis and
Performance evaluation for a
given system/configuration
Simulation
November 14th
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 7
Network Planning Tools :
Tool examples per category
Overall technoeconomical
evaluation
STEM, Excel applications
Optimization
Detailed Design and
Configuration
Analysis and
Simulation
November 14th
Network coverage
Level of detail
Design and
PLANITU, NetWORKS,
VPI-Maker family,
NetQUAD, CHIRplus family
VPI-Configurator family
NetWORKS - Pro,
CIRCEE
OPNET,COMNET,
SPECTRA family
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 8
Network Planning Tools : STEM
Objective : STEM by “Analysys”
(in Cambridge) is a business
decision making support tool that
Business
enables the analysis of business
Planning
models for Telecommunication
Networks and services over a
period of time.
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
November 14th
Lecture NP - 5 .1 - slide 9
Business Planning Tools : STEM
• Coverage
–Service Demand Projection
–Evaluation of network investment
–Evaluation of revenues for given tariffs and installation rate
–Interrelation between network growth and operational cost
–Pre-programmed for Standard Telecom and Finance calculations
and for facilitating the rapid development of new models
–Produces the standard financial results like Cash Flow, Profit & Loss,
Balance Sheet.
–Interfacing to other MS Windows applications like Excel, Word,....
November 14th
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 10
Business Planning Tools : STEM
Activity Flow:
Replacement
of Resources
Demand
Parameters
Incremental
Demand
for service
Resource
Depreciation &
Decommissioning
Total
Incremental
Demand for
Resources
Tariff
and
Revenue
Resources Costs
(And trends)
Incremental
Resource
Supply
Production
& Costing
of Resources
Service
costs &
charges
Input data
Tariff
Policy
November 14th
Others costs
(Admin/mkt)
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Phase of
calculation
Lecture NP - 5 .1 - slide 11
How the STEM engine works
Time period
Definition of the the Resources (cost elements)
(capacity, physical and financial lifetime, unit costs)
Definition of the Services
(demand, tariff structure)
Definition of the dimensioning rule
(or how the demand is satisfied by some resources)
Calculation of the number of resources
Calculation of costs (capex, opex, depreciation…)
Calculation of revenues
Standard technical and financial results
(NPV, EBITDA, Cash flow,…)
November 14th
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 12
Business Planning Tools : STEM
Services
Resources
physical lifetime
n traffic-carrying capacity
n depreciation period
n economies of scale
n capital expenditure
n operating expenditure
subscribers
service rates
n annual and busyhour traffic
n Erlang or BW
demand
n resources required
n
n
n
STEM*
Time
n
cost-related tariffs and demand elasticity
n age-based cost profiling
n non-linear resourcing
STEM allows both a macroscopic and
microscopic approach to modelling
Examples:
Macroscopic
November 14th
One Resource used to model all BTSs in a
mobile network
Intermediate
approach
BTSs grouped by area type,
e.g. urban/suburban/rural/highways
Microscopic
BTSs modelled one by one
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 14
The user must choose the level of detail to
be modelled
The user decides the
best level of
granularity, which
involves a trade-off
between…
November 14th
The complexity of modelling and
the large volume of input required
when geographical factors are
considered in great detail
Inaccuracies involved in
averaging out over sites when
using the intermediate approach
(e.g. urban/suburban/
rural/highways)
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 15
STEM focuses on telecoms objects
Resource comparison and
transition
Allocation of costs to
tariffs
Subscribers
November 14th
Traffic
Tariffs
Resource requirement
Cost dependent tariffs
Price elasticity of demand
Capacity
Lifetime (physical and financial)
Costs (capex, opex)
Age profile
Economies of scale
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 16
STEM is demand driven
and allocates costs to demand
Cost
causality
chain
November 14th
Demand
causality
chain
• Demand driven
• The STEM Editor
emphasises the
demand causality
chain between
services and
resources
• The cost
causality chain
flows in the
opposite direction
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 17
Business Planning Tools : STEM
Modeling Elements
The modelling basics
Market Segment
Services
Resources
Transformations
Locations
Financial model
November 14th
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 18
Market Segment
1. Choose the Size of the Market
2. Select the Service(s) to which this
Market Segment is associated
3. You can define a set of inputs which can
be referenced in formulae, and also in the
definitions of derived results
November 14th
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 19
Understanding the Type menu
• The Type menu is a commonly-used menu for inputting
data:
– Constant
– Exponential Growth
– Floor & Multiplier
– S-Curve
– Dual S-Curve
– Interpolated Series
– Transformation
November 14th
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 20
Services
A Service is anything you can draw a revenue from, such as mobile telephony, X.25,
house rentals…
1. Define the Demand for this service
(customer base, traffic unit, penetration
rate…)
2. Define the Tariff of this service
(connection, rental usage tariff)
3. Select the Resources the operator must
install to provide that service
November 14th
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 21
Resources
A Resource is anything that will cost you something, such as switches, leased lines,
staff, a licence…
1. Define the capacity and the lifetime
(physical, financial) of the Resource
2. Define the cost (capital cost, maintenance
and operation costs…) of the Resource
November 14th
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 22
Transformations can use a variety of inputs
and can drive several elements
•
DRIVERS can be:
– Resources
– Services
– Transformations
l
November 14th
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
DRIVEN elements can be:
w Resources
w Services
w Transformations
w Locations
w Market Segments
Lecture NP - 5 .1 - slide 23
Transformations allow Resources to be
driven
by other Resources rather than by Services
• This is particularly useful when:
– there is a natural relationship
between two Resources
• e.g. towers are driven by
base stations
– Resources are distant from end
customers and Services
• e.g. in backbone networks
• However, all Resources in a
STEM model are ultimately driven
by Service demand
November 14th
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 24
The rationale for Transformations is
to act as secondary sources of demand
e.g. number of
installed units
e.g. time lag
Input
Transformation
Output
November 14th
e.g. roll-out
other
resources
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 25
Transformation: an example
Node
Link
Input: Number of Installed Units for NODES
Transformation type: Expression Transformation
Expression=Input1*(Input1-1)/2
Output: used to roll out LINKS
November 14th
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 26
Erlang B Transformations can be used to
convert Erlangs into channels
The input to the Transformation is the
Service busy hour traffic
The Erlang B formula returns the
number of channels required to meet that
level of traffic (given the GoS) and the
number of sites (because the formula is nonlinear)
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
November 14th
Lecture NP - 5 .1 - slide 27
Business Planning Tools : STEM
Example of results for business analysis
* Under licence of Analysys
November 14th
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 28
Business Planning Tools : STEM
Example of results for business analysis
November 14th
ITU/BDT-COE Network Planning/ Supporting Tools - O.G.S.
Lecture NP - 5 .1 - slide 29