ngn white paper

7/27/2019 NGN White Paper

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NGN White Paper-Ashutosh Pandey

Next generation network(NGN)

Next generation network (NGN) is a broad terms used to describe key architectural

evolutions in telecommunicationcore and access networks. The general idea behind the

NGN is that one network transports all information and services (voice, data, and all sorts of

media such as video) by encapsulating these into packets, similar to those used on

the Internet. NGNs are commonly built around the Internet Protocol, and therefore the

term all IP is also sometimes used to describe the transformation toward NGN.

According to ITU-T, the definition is:

A Next generation network (NGN) is a packet-based network which can provide services

including Telecommunication Services and able to make use of multiple broadband, Quality

of Service-enabled transport technologies and in which service-related functions are

independent from underlying transport-related technologies. It offers unrestricted access by

users to different service providers. It supports generalized mobility which will allow

consistent and ubiquitous provision of services to users.

NGN involves three main architectural changes that need to be looked at separately:

NGN implies a consolidation of several (dedicated or overlay) transport networks

each historically built for a different service into one core transport network (often

based on IP and Ethernet).

In the wired access network, NGN implies the migration from the dual system of

legacy voice next to x-DSL setup in local exchanges to a converged setup in which

the DSLAMs integrate voice ports or VoIP, making it possible to remove the voice

switching infrastructure from the exchange

NGN convergence implies migration of constant bit rate voice to Cable Labs Packet

Cable standards that provide VoIP and SIP services. Both services ride over DOCSIS

as the cable data layer standard.

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http://en.wikipedia.org/wiki/Telecommunicationhttp://en.wikipedia.org/wiki/Core_networkhttp://en.wikipedia.org/wiki/Access_networkhttp://en.wikipedia.org/wiki/Packet_(information_technology)http://en.wikipedia.org/wiki/Internethttp://en.wikipedia.org/wiki/Internet_Protocolhttp://en.wikipedia.org/wiki/ITU-Thttp://en.wikipedia.org/wiki/ITU-Thttp://en.wikipedia.org/wiki/Packet_(information_technology)http://en.wikipedia.org/wiki/Computer_networkhttp://en.wikipedia.org/wiki/Broadbandhttp://en.wikipedia.org/wiki/Quality_of_Servicehttp://en.wikipedia.org/wiki/Quality_of_Servicehttp://en.wikipedia.org/wiki/Access_networkhttp://en.wikipedia.org/wiki/DSLAMhttp://en.wikipedia.org/wiki/PacketCablehttp://en.wikipedia.org/wiki/PacketCablehttp://en.wikipedia.org/wiki/Session_Initiation_Protocolhttp://en.wikipedia.org/wiki/Telecommunicationhttp://en.wikipedia.org/wiki/Core_networkhttp://en.wikipedia.org/wiki/Access_networkhttp://en.wikipedia.org/wiki/Packet_(information_technology)http://en.wikipedia.org/wiki/Internethttp://en.wikipedia.org/wiki/Internet_Protocolhttp://en.wikipedia.org/wiki/ITU-Thttp://en.wikipedia.org/wiki/Packet_(information_technology)http://en.wikipedia.org/wiki/Computer_networkhttp://en.wikipedia.org/wiki/Broadbandhttp://en.wikipedia.org/wiki/Quality_of_Servicehttp://en.wikipedia.org/wiki/Quality_of_Servicehttp://en.wikipedia.org/wiki/Access_networkhttp://en.wikipedia.org/wiki/DSLAMhttp://en.wikipedia.org/wiki/PacketCablehttp://en.wikipedia.org/wiki/PacketCablehttp://en.wikipedia.org/wiki/Session_Initiation_Protocol


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Next Generation Networks are based on Internet technologies including Internet

Protocol (IP) and Multiprotocol Label Switching (MPLS). At the application level, Session

Initiation Protocol (SIP) seems to be taking over from ITU-T H.323.

Initially H.323 was the most popular protocol, though its popularity decreased in the "local

loop" due to its original poor traversal ofNetwork address translation (NAT) and firewalls.

What Do We Know? NGN Service Characteristics

1. Ubiquitous, real-time, multi-media communications

2. More personal intelligence distributed throughout the network

3. More network intelligence distributed throughout the network

4. More simplicity for users

What Dont We Know?

1. Specialized resource services

2. Processing and storage services

3. Middleware services

4. Application-specific services

5. Content provision services that provide or broker information content

6. Interworking services for interactions with other types of applications, services,

networks, protocols, or formats.

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http://en.wikipedia.org/wiki/Internet_Protocolhttp://en.wikipedia.org/wiki/Internet_Protocolhttp://en.wikipedia.org/wiki/MPLShttp://en.wikipedia.org/wiki/Session_Initiation_Protocolhttp://en.wikipedia.org/wiki/Session_Initiation_Protocolhttp://en.wikipedia.org/wiki/H.323http://en.wikipedia.org/wiki/Network_address_translationhttp://en.wikipedia.org/wiki/Internet_Protocolhttp://en.wikipedia.org/wiki/Internet_Protocolhttp://en.wikipedia.org/wiki/MPLShttp://en.wikipedia.org/wiki/Session_Initiation_Protocolhttp://en.wikipedia.org/wiki/Session_Initiation_Protocolhttp://en.wikipedia.org/wiki/H.323http://en.wikipedia.org/wiki/Network_address_translation


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Next Generation Service Architecture

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Open Service Interfaces

Why are NGNs important for service providers? - Public network carriers should (and

must) pursue NGNs to offer value-added services. This will be their new strategic

Differentiator!

What are the most important trends, characteristics, and specific services in an NGN

Environment? Although it is difficult to predict what the next killer applications will

be,this paper lists service characteristics and capabilities that will be important in the

NGNEnvironment based on service-related industry trends.

What attributes should a Next Generation Service Architecture possess? - One of the

primary goals of NGNs is to provide a common, unified, and flexible service

architecturethat can support multiple types of services and management applicationsover multipletypes of transport.

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Points To Ponder:

Issues to be kept in mind while planning for NGN deployment

Latency (delay) Jitter

Bandwidth

Packet loss

Reliability

Security

Inter-operability

NGN drivers

Converged network

Fixed and mobile

Multiple services

Conversational VoIP & video

IPTV and content streaming

Bandwidth on demand

Dynamic VPN

Gaming and other real-time applications

Differentiated service offerings

Enterprise and residential services

Bandwidth Manager Values

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New services and business models Speed to market (voice, video, data, etc)

Increased network efficiency

Increased operational efficiency Reduced MPLS provisioning End-to-end Qos

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