slide1 n.
Skip this Video
Loading SlideShow in 5 Seconds..
Prof. Giorgio Ventre Studenti Marotta Antonio 885/000484 Sorrentino Maurizio 885/000472 Traficante Nicola 885/000492 Se PowerPoint Presentation
Download Presentation
Prof. Giorgio Ventre Studenti Marotta Antonio 885/000484 Sorrentino Maurizio 885/000472 Traficante Nicola 885/000492 Se

Loading in 2 Seconds...

play fullscreen
1 / 11

Prof. Giorgio Ventre Studenti Marotta Antonio 885/000484 Sorrentino Maurizio 885/000472 Traficante Nicola 885/000492 Se - PowerPoint PPT Presentation

  • Uploaded on

Prof. Giorgio Ventre Studenti Marotta Antonio 885/000484 Sorrentino Maurizio 885/000472 Traficante Nicola 885/000492 Sergio Picirillo 885/000537. What’s Next Generation Access. What is NGN?

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
Download Presentation

PowerPoint Slideshow about 'Prof. Giorgio Ventre Studenti Marotta Antonio 885/000484 Sorrentino Maurizio 885/000472 Traficante Nicola 885/000492 Se' - stevie

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Prof.Giorgio Ventre


Marotta Antonio 885/000484

Sorrentino Maurizio 885/000472

Traficante Nicola 885/000492

Sergio Picirillo 885/000537

what s next generation access

What’s Next Generation Access

What is NGN?

NGN, next generation networks, is a term referring to the evolution that is interesting telecommunication networks. A Next Generation Network is a packet-based network able to provide telecommunication services to make use of multiple broadband, QoS-enabled transport technologies and in which service-related functions are independent from underlying transport-related technologies.


The objective in the next 5-10 years is to converge all the multimedial services in the IP paradigm.


the bigger concurrency among tlc operators;

the increase of digital traffic;

the intense use of the Internet;

the need for mobility.

It’s expected a great growth of the demand for new services with features of:




It will be possible to introduce new multimedial services that can be personalized according to customer’s needs.

who is francesco caio

Who is Francesco Caio?

Francesco Caio has a long experience in the telecommunication field:

he was one of the managers who created Omnitel and contributed in the so-called “Omnitel” miracle;

he worked for Olivetti and then for Merloni;

he founded “Netscalibur”;

he managed important English telecommunication societies such as Cable and Wireless.

Caio has become very famous because of the call he received by English prime minister Gordon Brown, who asked him to elaborate a review about the state of English telecommunication system.


The objective was to collect ideas and suggestions for the development of next generation access (NGA) network in the UK.


Brown’s call derived from a practical issue: BBC launched a web-service, called “i-Player”, that has had a great success but has also created some problems for the network. The access was not under stress, but the backhaul was: it is the central part of the network and the point where there is less concurrency. There was a big preoccupation about the inadequacy of the network for supporting new services that deal with videos. The big question risen, was if market could support the development of the infrastructure in order to guarantee the born of new services; another issue concerned the government’s intervention in support of the investments in optical fiber.


The studies and the researches proved so far that the existing infrastructure, based mainly on ADSL, is very appropriate for the application based on the web. So there is no worry about the presence, because the network is sufficient today, but you cannot say so in the future.

introduction to nga

Introduction to NGA

The Caio Report is to be intended as a review of how to use NGA to invest in its development. Using NGA, the advantages that can be exploited are faster and more reliable downloads speed, a lower latency and a greater degree of symmetry between the down- and up-links for the end user.

 Fiber access networks are often described according to the nature of three variables:

Nature of components: they can be active or passive. An active component of a broadband network is usually a piece of electrically-powered switching equipment which manages signal distribution and directs signals to specific customers. Passive component of the network refers to physical infrastructure needed to carry the signal to different points of the network.

Extent of fibre reach:

FTTH, “fibre to the home”, that extends from the core network to the premises (speed of

100 Mb/s);

FTTC, “fibre to the cabinet”, in which fibre connections only reach street cabinets and

copper provides the connection from the street cabinet to the home (speed of 24-50 Mb/s).

Network configuration and design: FTTH networks have two main types of configuration:

point-to-point (P2P), in which a single dedicated fibre runs from each home;

Passive Optical Network (PON, the most common variant of which is GPON) in which bandwidth

is shared between users in a series of thinning pipes, and directed via optical splitters.


NGA network can be thought of as three layers:

-Services e.g. voice, broadband, TV

-Active transport and switching of traffic.

-Passive dark fibre, ducts, etc.

The development of NGA and, in particular, of fibre-based access networks, poses a series of challenges in term of large investment:

the cost of deploying fibre access using FTTH/P2P (i.e. a single fibre to each home) on a national basis is almost £29 billion;

a GPON configuration (in which a fibre connection is shared between several homes) would cost around £24.5 billion;

if fibre was deployed only to street cabinets (FTTC), the cost would be around £5 billion. FTTC would though deliver a lower level of performance.

uk s role in developing nga

UK’s role in developing NGA

UK has a leading role in the development of NGA:

the UK enjoyed a rapid growth in broadband penetration between 2003 and 2007. There are now over 16 million broadband lines in the UK;

the UK is now among the world leaders in broadband coverage, with 99.6% of homes connected to an ADSL-enabled exchange;

the UK has high levels of digital TV take-up through satellite, cable, and digital terrestrial television;

consumers of broadband are the most active users of the internet in Europe, and are among the biggest contributors to the online economy.

The principle actors in this development are:

Virgin Media


In July 2008, BT announced plans to invest £1.5 billion over five years on an NGA network that will deliver download speeds up to 40 Mb/s to 10 million homes by 2012. The deployment will involve a mix of fibre-to-the-home (FTTH) and fibre-to-the-cabinet (FTTC).


The Government’s role in the longerterm

  • The Government should seek to remove obstacles that could compromise the development of new network.
  • A competitive NGA is essential for the UK to retain its leadership in the online economy. Because the broadband is increasingly central to society and business.
  • The government can create an environment that supports private investment. The quality of networks and services attract investment.
  • The rapid adoption of internet technology as the new standard for communication has driven a profound transformation in many industries. The growth in household broadband penetration has rapidly extended this transformation to consumers who have come to use the telecom network as a permanent source of news, entertainment and services.

There are differentsinitiativesthatgovernmentshould put in placenowforsupportroll-outof NGA. The initiatives can be clustered in three groups.

  • The Governmentshould:
  • Create stimulustoinvest
    • Work withOfcomto accelerate the releaseof radio spectrumfor mobile broadband.
    • Mandate trasparency on network capacity management policies. The objectiveofthiswouldbetwofold, first, itwould create some pressure on ISPsto upgrade theirexistingcapacity, second, itmight help providers and consumerstovaluedifferences in qualityof service.
    • Supportanagreed minimum specificationfornewbuild NGA.
  • Facilitate the implementationof NGA byremovinguncertainties and lowering the costofbuild-out
    • Identify a specificimplementationpath.
    • Lowercostofcivilworksthrough a bettercoordinationofstreetworks.
    • Relax constraint on overheaddeploymentoftelecomslines.
    • Addressbarriersto alternative ductingmethods.
    • Provideclarityoverapplicationof business ratesto fibre.
  • Create the conditionstofavourdevelopmentofnewinvestmentmodels
    • Establish a network ofsupportforlocal NGA developments
    • Focus resources on open-accessnetworks
  • The Governmentshould monitor progress of NGA in hercountry and in othercountry. The goodpracticeistoinstituteanannualeventtodiscuss progress with full rangeofstakeholders and update priorities.

Is there a real need for NGA?

Most of internet-based video streaming have needs in terms of bandwidth that can be accomplished by normal DSL connections (300-500 Kb/s). The core and backhaul networks of ISPs around the world were designed to support the pattern of use typical of web browsing (short burst of data flowing primarily in one direction) or continued streaming of relatively narrow band applications.

  • There is evidence of consumer demand for applications which require greater bandwidth, and of this placing a strain on the network. There are though ways in which that demand can be met without NGA, in particular by addressing the bottleneck in backhaul, which is where the constraints generally lie, but also by further innovation in the copper network. 
and in italy
...and in Italy?
  • Italy is one of the few countries that are characterized by a big delay in the deployment of NGN.
  • Actually, at the moment there is no broadband offer beyond the 20Mb/s for residential customer.
  • There is only one consumer of NGN in Italy, that is Fastweb.
  • There is no cuncurrency for increasing speeds.

Anyway the first steps have been made:

There was the first operational meeting in Rome of Italy NGN Committee, which approved

the plan of activities and launched the idea of a multi-operator trial program to promote

the rapid development and sharing of NGN (Next Generation Networks) in Italy.

The plan, as agreed, will be continued through five thematic groups:

  • evolution of NGN and its regulation;
  • network architecture of next-generation access and transport;
  • evaluation of cost-benefit and funding models of access networks;
  • models of interconnection and access to next generation networks;
  • evolution of services and new business models.