ZyXEL Communications NSA221 Manual do Utilizador descarregar pdf (Página 3)

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Digital

Home

Next Generation

Pervasive computing and ambient networks are two

major technologies for digital home applications. Reality

shows that there are three migration phases for digital

home services such as: matured communications, growing

entertainment and smart home market phase.

New Revenues with Innovative

Digital Home Services

The digital home market is one of the

major service markets for carriers. Almost

all carriers o er broadband access services

and plan next-generation FTTx access

services to meet future multi-service

requirements for digital home subscribers.

This happens in the communications

market phase.

Some tier-1 carriers start to o er high

de nition IPTV, gaming, and handy widget

applications in addition to planning 3D

gaming and 3D TV in the near future. This

happens in the entertainment market phase.

Furthermore, three pilot carriers (AT&T,

BT, and NTT DoCoMo) start to o er smart

home services for trial as a new opportunity

to generate revenue from smart home

applications. This happens in the early smart

home market phase.

Smart home services o er several bene ts.

They can generate additional higher ARPU

in addition to retaining phase-1 and phase-2

subscribers on the stick. However, it is a big

challenge for AT&T, BT, and NTT DoCoMo

because there is no standard service-on-

demand platform to extend any new

services and to reduce OPEX for many non-

standard platforms.

4

OSGi Technology Overview

Bene ts of Using OSGi: OSGi (Open Service

Gateway Initiative) is an industry standard

for a lean Java-based component system

with focus on local applications following

the service-oriented or service-on-demand

architecture. The OSGi service platform

is a mature, open and dynamic modular

software system which meets the needs of

advanced home gateways and o ers more

 exible services.

There are three main components of OSGi:

framework, bundle, and service. “Framework”

means that it is installed on a Java virtual

machine. “Bundle” means that subscribers’

applications run in the OSGi framework.

“Service” describes the interfaces of bundles.

Bundles, services, life cycle, security and

execution environment components are

brie y described as follows:

• Bundles: Bundles are OSGi components

made by the developers.

• Services: The service layer connects

bundles in a dynamic way by o ering a

publish- nd-bind model for plain old

Java objects.

• Life Cycle: Life cycle is the API (Application

Programming Interface) to install, start,

stop, update and uninstall bundles.

• Modules: This is the layer which de nes

how a bundle can import and export

codes.

• Security: This is the layer which handles

security aspects.

• Execution Environment: It de nes what

methods and classes are available on a

speci c platform.

OSGi Application Scenario

Bundles

Data Center

Service Provider

OSGi Framework

JAVA VM

OS/RTS

Gateway

Subscribers

Standard

Services

Customised

Services

AV Applications

Automation Control

Security and Safety

PC Type

Evolution of Digital Home Market

Time

Evolution

Application Infrastructure

Phase 3

Phase 2

2000 2002 2004 2006 2008 2010

Communications

Satellite DSL Access Point

Information

Entertainment

Smart Home

Cable Modem

Ethernet Active Fibre PON Router

Desktop PC PDA Printer Tablet PC Notebook Netbook

HDTV

IP TVMusic

Internet TV Online Gaming

Home

Security

Multimedia Healthcare

Home

Surveillance

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Phase 1

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