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EcoNets. User’s Guide. 1. The basic design methodology 2. Description of input files (use the Textbook or Help Menu for additional details) 3. General Description of output files (use the Textbook or Help Menu for more details) 4. General Description of File Menu. EcoNets.

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Econets

EcoNets

User’s Guide

1. The basic design methodology

2. Description of input files (use the Textbook or Help Menu for additional details)

3. General Description of output files (use the Textbook or Help Menu for more details)

4. General Description of File Menu


Econets

EcoNets

-Its Capabilities

A tool that models new network topologies.

It can also model any given topology.

A network design tool based on interactive

and iterative techniques.

A tool that provides cost and performance

summaries.

A tool that provides a capability to store

and view detailed outputs and topologies.


Econets

EcoNets

-Its Requirements

A Mac/PC with 16 Mbytes of RAM for a

trial version (< 60 nodes) or 32 Mbytes (<

250 nodes) or 64 Mbytes (< 500 nodes).

System 6.05/7.0x(MAC) & Windows.

MS PPT or HTML Browser for slides.

The PC must be a 486DX/Pentium type


Econets

EcoNets

- Design Approach

Considering the facts that (1) network

topology determines total monthly costs

and performance, (2) there are almost

infinite topologies possible & (3) 70-80%

of the monthly costs are determined by

access lines and trunks, one must then

Vary design parameters to obtain a

subset of useful network topologies,

study their costs and performance

to

obtain the optimum topology.


Econets

EcoNets

- About Inputs

A maximum of 17 input files may

be required to design a network

Each input file is a sequential or a

“flat” text file

A negative number defines an end

-of-file (EOF) for each input file

The structure of data within each

input file is derived by

EcoNets

.


Econets

Econets Package

EcoNets

- Inputs & Outputs

Example

Inp

. Files

Outputs

VHD

Input files,

LINK

Output files,

Package

MAP

Topology &

NLT

Performance

TARIFF

Summaries.

EcoNets

SDF

DTP

FILES


Econets

EcoNets

:Required Input Files

1. VHD - Defines V&H coordinates of

each node and its BHR traffic value

2. LINK - Defines ALink types that connect

network nodes (e.g. CPEs)

3. MAP - Defines the map boundary

4. NLT - Defines each link type, C,

Wm

,

MF, applicable tariff number &

F

pf

5. TARIFF-Defines each tariff listed in NLT


Econets

EcoNets

:

Reqd

.Input Files(

Contd

.)

6. SDF - Defines < 60 design parameters

7. NAME - Defines < 6-character codes

for each network-node name

8. FTD - Defines detailed from-to traffic

flows for each nodal pair

9. LATA - Defines a LATA number for

each network node

10. FILES - Names all input files used

for each model


Econets

EcoNets

:

Reqd

. Input Files(

Contd

.)

11. CSABDS - Defines customer service area

bands for ACD networking

12. UTBL - Defines Virtual 800-Service tariff

13. WUTBL -WATS-Service tariff

14. MUTBL -MegaCom800-

Svc

. tariff

15. RSTBL - Rate-Step-Table for

ACDs

16. DTP - defines daily traffic profile

17.

SWF

- defines #

SWs

and SW IDs


Econets

EcoNets: Available Inp. File Types

Input Files are defined by their 2-letter prefixes of

their assigned numbers. Any input file names

without the following 2-letter prefixes will be

ignored - a FATAL Error.

1. VH 2. LI 3.MA 4. NL 5. TA

6. SD 7. NA 8. FT 9. LA 10. FI

11. CS 12. UT 13. WU 14. MU 15. RS

16. DT 17. SW


Econets

EcoNets

- File Operations

Create a new input file

View/Update an input file

Save/Duplicate file under another name

Merge 2 VHD/Map/FTD files

Multiply VHD traffic values by fixed

k

View

Output

File (text or graphics)

PrintOutputFile


Econets

EcoNets

- The VHD File

The 1st element of each vector defines the

assigned node number for a CPE

The 2nd element defines

theVertical

(V) -

Coordinate for the node CPE

The 3rd element defines the Horizontal (H)-

Coordinate for the node CPE

The 4th element defines the node’s Time

Consistent

Avg

. (TCA) of busy hour(BHR)

traffic intensity (

millierlangs

for voice, bits

per second for data). A FTD file must be

used to represent actual traffic flows.


Econets

EcoNets

- the LINK File

A LINK file defines voice/data AL types

• A LINK file is used only when Flk=1

It has a single column of numbers,

each defining the access link (AL) type

for each nodal CPE when Flk=1.

Range of AL types=1, 2, 3, 4, ..per NLT

If a LINK file is not read (i.e. Flk=0),

each CPE is assigned ALT type in SDF.


Econets

EcoNets

- Tariff file

structure

1st element of a 16-element vector defines

the average total cost of 2 local channels

(

LCs

) of each leased AL or TK,

Next 5 elements define the upper values

of mileage bands (=< 5),

Next 5 elements define the associated

fixed monthly costs,

Next 5 elements define the associated per-

mile costs.


Econets

EcoNets

- SDF file structure

Upto

60 design parameters can be

defined to either create a network

topology or affect its performance

These 60 parameters can be

divided into 4 distinct sets:

1. Common 2. Voice-related

3. Data-related 4. ACD-related


Econets

SDF File - The Common

Design Parameters

TGF (traffic growth factor)

F

,

F

,

F

,

F

file read factors

...

inp

.

.

lk

nn

ftd

lt

V

,

V

,

H

,

H

.viewing area

..

min

max

min

max

F

(print or not to print factor for nodal#s)

np

ADM, DPM (actual/days/

mo

.)

NDEC, DECT (

F

for

COGs

),

dis

Note: See TEXT for complete definitions


Econets

SDF - The ACD-Related

Design Parameters

ECD

(

Exp

. Call Duration in

Secs

.)

DREQ, PEXD

(Delay

reqd

. for design

and

prob

. of exceeding DREQ)

Clbr

(cost of labor in $/Hr.)

Frst

(rate setting factor for discounts)

ACDT

(ACD type to be modeled)

Note: See TEXT for complete definitions


Econets

EcoNets

- FTD file structure

Each vector has 3 elements:

1. From-Node (e.g. 1,2,3,....)

2. To-Node (e.g. 2, 3, 1,.......)

3. TCA of BHR traffic intensity (

milli

-

erlangs

for voice,

bps

for data)

1

2

25000

2

3

12000

-1


Econets

EcoNets- LATA file structure

The LATA input file consists of a single column with as many rows as there are CPE nodes in the network. Each element is a 3-digit Local Access & Transport Area (LATA) code. LATA file is also used for ACD/VPN network design where each element is a 2-digit geographical code (varying from 01 to 60) used by common carriers. See pages 265-267 of Text for a table relating these codes to CSABDS (varying from 1 to 6). An example for a 5-node network is as follows:

[email protected]@[email protected]@922@-1} … @=CRLF


Econets

EcoNets

:

CSABDS file structure

The CSABDS has 60 vectors, each

with 62 elements. Each vector

represents a region. Each element

represents the customer service

band# for a given pair of source &

destination regions. See Chapter 8

of Textbook “Network Design Using

EcoNets

” for further study.


Econets

MUTBL File Structure:

Hourly Usage Cost($) Vs.CSABD

CSABD

B.Day$

Evening$ N/

Wkd

$

1

11

9

8

2 12 11 9

3 13

12

10

4 14 13 11

5 15 14 12

6 16 15 13

-1. Note:CSABD may = mileage band value


Econets

EcoNets

:

RSTBL file structure

A RSTBL consists of 60 vectors, each

consisting of 6 elements.

There is one vector for each calling

region.

Each of the six elements represents a

rate step, one for each CSABD.

See Chapter 8 of Text for more help.


Econets

EcoNets

:

SWF

Structure

A

SWF

has a single

columned

vector,

with the first value,

Nsw

, defining the

number of switches followed by

Nsw

site IDs for all switches

The structure is {

Nsw

@ID(1) @ID(2)

@.........@ID(

Nsw

)@ -1}

A

SWF

may have additional values

for

ACDNets


Econets

Understanding Output Files

1. VoiceNets, ACDNets, and DataNets have unique output file structures

2. Textbook is the best source of good examples of output files for all networks

3. The Help Menu is a also a good source of hints for reading output file data


Econets

Understanding Output Files (Contd.)

4. Output files for VoiceNets describe details of each AL bundle (star topology)

5. Output files for ACDNet describe details of each virtual AL bundle (star topology) and agent force required for each hour for which calls are answered.


Econets

Understanding Output Files (Contd.)

6. Output files for StarDataNets describe each AL Bundle for a Star Topology

7. Output files for MDNets, DLNets & MSTNets describe details of each netlink (e.g. sites sharing a netlink plus delays)

8. Output files also list response times.


Econets

Understanding Output Files (Contd.)

9. Output files are saved under following names automatically: ALFSDi, ALFMDi, ALFDLi, ALFMST, ALFVN, ACDF and TKF where “i” represents the ith level of AL bundle and TKF represents an output file for a fully connected mesh backbone trunking network. To prevent overwrites, one must open it and use “Save as..”.


Econets

The Network Design Process

Understanding of input and output files

is only one aspect of the network design

process.

The

user interface

and the task of

finding optimum locations

for switch

locations are also useful for under-

standing the network design process.


Econets

Grahic

-r’s InterUseface (GUI)

for making the network design process a

truly

interactive

one. One such interface

popularly known as the graphics user

interface (GUI) is now available for all

modern

deskop WSs

. Such a GUI employs

windows, menus, dialog buttons and edit

fields to enable the user to handle all file and

networking operations in an effortless

manner.

A user friendly interface is an utmost necessity


Econets

(1) Latest Version of EcoNets (e.g. date of issue & contact info)

(2) input files-contents/structures,

(3) output files -how to read them,

(4) networking tasks and results.

(5) analysis tasks. This menu can

help reduce references to textbook.

A GUI for

EcoNets

(

Contd

.)

4. HELP MENU: It enables the user to

interpret useful data related to:


Econets

Class Assignments

1. Study SDF design parameters and divide them into 2 groups: dynamic (those affecting performance and static (those that influence presentation of results).

2. Attempt some network topologies for a given VHD17 input file ( only voice & data)

3. Study output files, ALFSD1, ALFMD1, TKF with help of Textbook and print them.

.


Econets

Class Assignments: Contd.

4. For each network modeled, study the DBF and print it. Study it for the listing of all important design parameters. Note: A structured DBF is automatically created for each network modeled.

5. Study the TKF for a 2-SW network model with the help of Chapt. 2, Eq. 2.28


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