• Nenhum resultado encontrado

ENGENHARIA DE SERVIÇOS SERVICES ENGINEERING

N/A
N/A
Protected

Academic year: 2021

Share "ENGENHARIA DE SERVIÇOS SERVICES ENGINEERING"

Copied!
26
0
0

Texto

(1)

Cenários de Mudança 1

-Setting the Context 1

2012-2013

Mestrado em Engenharia de Redes de Comunicações

MSc in Communication Networks Engineering

ENGENHARIA DE SERVIÇOS

SERVICES ENGINEERING

(2)

Outline

Some history leading to present networks

Value-added services in fixed & mobile

(3)

Some History

By 1973 1974-83 1984-93

1994-03 2004:

Environment

Monopolistic

Monopolistic

Deregulation

Competition

Competition

Technology

Microprocessor

VLSI

Moore’s Law Rampant

Moore’s Law Rampant

Software Engineering

Software Engineering

Circuit

Switching

Mechanical

Electro-Digital

Switching &

Control

ISDN

ISDN

ISDN

Packet

Switching

ARPANET

TCP/IP

X.25

Frame Relay

ATM

IP Dominance

IP Dominance

Mobile

Networks

First Generation

Analogue

2G

2nd Generation

Digital (Voice)

3G

3rd Generation

IP Mobile Data

Value-Added

Services

Supplementary

Services

IN-based Services

IN-based Services

(4)

A Fixed Perspective*

* British Telecom

Next Generation Broadband

is the term used to

describe broadband delivered over both advanced

(5)

A Mixed Perspective*

EE (Everything Everywhere) is the company that runs the

Orange and T-Mobile brands in the UK, and will be launching

its new superfast 4G brand – EE .

Its 4G service will cover a third of the population by the end of

2012 and its fibre service will be available to more than 11

million households and businesses by the end of the year.

EE’s mobile service currently provides coverage to 99% of the

(6)
(7)

Traditional Service Models

Communications Networks and Services

Fixed Networks (Wired or Wireless)

Public Switched Telephone Network (PSTN)

Rede de Serviço Telefónico Fixo

Internet Access Provider (IAP)

Rede de Serviço de Acesso à Internet (IAP) (ADSL)

Cable Network

Rede de Cabo (Hybrid Fiber-Coax)

Mobile Networks

Mobile Network Operator

Serviço Móvel Terrestre (SMT)

Public Address Mobile Radio (PAMR)

Serviço Móvel de Recursos Partilhados (SMRP)

Mobile Virtual Network Operator (MVNO)

(8)

Traditional Service Models

Communications Services

Network Reseller (Leased-Line Service

Provider)

Serviço de Circuitos Alugados

Broadcaster

(9)

Converged Service Models

Convergent Service Providers

3Play Service

on Fixed Wireless Access (FWA)

3Play Service

on ADSL

3Play Service

on hybrid FFTx (Fiber Coax)

4Play Service

on mixed Fixed/Wireless

(WiMax/WiFi/3G/LTE and ADSL)

(10)

Fixed Networks for Voice and Data

Complex, expensive, restrictive …

... The antithesis of the Ethernet

End

User

sites

~2k

sites

~1k

~500k

sites

~200

sites

sites

~20

sites

~5

IP

Leased Lines

PDH

PSTN

SDH VC-4

SDH

VC-12

ATM

PSTN

DSL

K/stream

Acess PDH

Acess

SDH

Copper

Fibre

(11)

Cable Networks

(12)

Early Mobile Networks

(13)

2G & 3G UMTS Mobile Networks

(14)

3G/cdma2000 Mobile Networks

(15)

Analog and Digital Trunking (TETRA) systems

Mobile to Dispatch

Trunk

PABX

Dispatch

Mobile to

Mobile

Group Call

PSTN

Pager

Signaling

Trunk

Dispatcher

Host Computer

Long Data

Telemetry

Voice Communications

Data Communications

*PAMR-Public Address Mobile Radio

(16)

Present ICT Networks and Services

Public Switched Telecommunications Network

Fixed and mobile voice with

Value-added Services

Access to data networks (user-server)

Classical

Intelligent Network (IN) Services

Internet

World wide IP transport network

Distinctive services: e-mail, Web, File transfer,

Streaming…

Enterprise Networking

Private networks based on switched circuit telephony

Private networks based on Internet technology

Switched interconnection networks

ATM, Carrier Ethernet, IP

(17)
(18)

PSTN Signaling Network: SS7

Signaling System # 7

The nodes of a telecommunication network

(exchanges, processing nodes, etc.) which

communicate with each other using SS7 are

called Signaling Points (SPs).

Signaling links interconnect Signaling Points.

Signaling links are the dedicated channels used to

transfer the signaling information between the

Signaling Points. One Signaling Point can transfer

the signaling information for many speech circuits.

A collection of signaling links directly connecting

two Signaling Points is called a signaling linkset

(set of signaling links).

(19)

SS7 Architectural Elements

SP – Signaling Point

SCP – Signaling Control point

STP – Signaling Transfer Point

(20)
(21)

Business Drivers in mid-1990s

Telcos positioning themselves in competitive

markets;

Use

differentiation

services as competitive tool;

An “endless” set of service possibilities exists,

some could be “

killer applications

”;

The need for

rapid creation of services

,

reducing the lead time from conception to use of

a new service;

Move toward

value-based pricing

of services

rather than cost-based;

Separation of

network operator

and

service

provider

where appropriate;

(22)

The Dawn of the Stupid Network

"

K

eep it

S

imple,

S

tupid," is an engineering virtue.

The

Intelligent Network (IN)

, is anything but simple; it is

a

marketing concept

for scarce, complicated,

high-priced services, surrounded by features like 800

service, call waiting, and automatic calling card

validation.

The age of centralized control is ending with the rise of

the next generation of Internet.

A new network "philosophy and architecture" is

replacing the vision of an Intelligent Network.

The vision in which the public communications network

is engineered for "always-on" use, not intermittence

and scarcity.

It would be engineered for

intelligence at the

end-user's device

, not in the network.

(23)

The Rise of the Stupid Network

The the network is engineered to simply

"

Deliver the Bits, Stupid !

” not for fancy network

routing or "smart" number translation.

Fundamentally, it would be a Stupid Network.

In the Stupid Network, the data tells the network

where it needs to go.

In contrast, in the “

Intelligent Network

”, it is the

network that tells the data where to go.)

In a Stupid Network,

the Data

on it

is the Boss

.

The Stupid Network is in fact the “

All IP

Broadband Network we currently know.

(24)
(25)

References and Readings

Websites:

British Telecom - Next Generation Broadband

http://www.btplc.com/ngb/

“Building the Carrier-Class IP Next-Generation Network”,

http://www.cisco.com/en/US/products/ps5763/

products_white_paper0900aecd802e2a52.shtml

http://www.isen.com/papers/Dawnstupid.html

http://www.isen.com/stupid.html

Documents:

H. Hanrahan, “Chapter 1: Setting the Context for Evolution and

Convergence of Networks” in Network Convergence: Services,

Applications, Transport, and Operations Support, John Wiley & Sons,

2007

M. El-Sayed, J Jaffe, “A View of Telecommunications Network

Evolution”, IEEE Communications Magazine, December 2002

W. Mohr, W. Konhäuser, “Access Network Evolution Beyond Third

Generation Mobile Communications”, IEEE Communications

(26)

References and Readings

Documents:

R. Wood, Next-Generation Network Services,

Cisco Press, 2005

V. K. Gurbani and X.-H. Sun, "2: Internet

Telephony: The Evolution to a Service-Oriented

Architecture," in Architecting the

Telecommunication Evolution, Cisco Press, 2005

M. H. Reeve, C. Bilton, P. E. Holmes, M. Bross,

“Networks And Systems For BT In The 21st

Century”, IEE Communication Engineer, October/

November 2005

Referências

Documentos relacionados

Em Mato Grosso do Sul, por exemplo, algumas iniciativas agroecológicas bem-sucedidas já foram realizadas para a produção de alimentos, como a abertura de novas empresas de revenda

tratam o pano de fundo desta publicação, e nos remetem para as decisões políticas ligadas ao sector da saúde e para o modo como estas se procu ra m adeq uar às m u­ da

nosso contexto de supervisão pedagógica numa Escola Secundária, enquanto orientadora de estágio de Português, ligada à Faculdade de Letras da Universidade do

Pedro’s text analyses the transformations in the quality of life of the popu- lation relocated to formal resettlements made by the mining company Vale in Tete Province, between

Table III: Gonad fatty acid composition (%) of Paracentrotus lividus males and females collected at the Impacted Shore and the Reference Shore (Peniche, Portugal) in July,

Imbuídos de um sentimento de resgate da memória local do que foi e tem sido a Restinga para nós, livro “O Tempo e a Restinga” foi construído sob quatro olhares: o nostálgico,

I argue that the Federal Reserve was (i) able to reduce MBS default risk premium by 66 bps (22% of the total reduction in MBS yields from November 2008 to November

Although genetically related with RHDV, RHDV2 emergence in 2012 in Portugal had a tremendous impact in wild rabbit populations and was a major drawback for the re-introduction of