ITS 2010 - Extended presentation slides

A First Glance Comparison of Next and New Generation Network Approaches

Antônio M. Alberti (INATEL)Tania R. Tronco (CPqD)

Christian E. Rothenberg (CPqD & Unicamp)

ITS 2010

Motivation Current Scenario (1/3)

The Internet became a vital part of today economy, society and institutions infrastructure.

However, requirements for the Internet have changed considerably since its conception.

Despite its huge success, Internet lacks on: Convergent multimedia experience for their users; Improved support for mobility and unfettered service access; Improved support for security, privacy, QoS; Improved network attachment and service control.

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Unsatisfied with such limitations, telecommunication operators standardized Next Generation Networks (NGN or NxGN). E.g.:

IMS (IP Multimedia Subsystem) from 3GPP. NGN-GSI (Next Generation Networks Global Standards Initiative) from

ITU-T.

Despite the promises behind SIP/UDP/TCP/IP convergent networks, many researches started to ask if they are ready to support:

A multimedia global information infrastructure? The tremendous increasing of new applications traffic? The drastically increasing in the number of

nodes/networks/applications? New 3D and immersive applications? Rich e-media and content distribution?

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The Internet and NGN limitations and uncertainties motivated what is being called Future Internet Design or New Generation Network (NwGN).

Many research initiatives started to reinvent or rethink Internet, so it can fully assume the role we are assigning to it. E.g.:

Japanese project Akari; European Future Internet Assembly initiatives; U.S. National Science Foundation Future Internet Design (FIND).

This paper provides a first glance comparison between key aspects of NxGN and NwGN proposals.

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Next Generation Networks At the heart of the NGN, sits 3GPP´s original IMS, which was

embraced by ETSI and ITU-T as the common control architecture.

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Next Generation Networks ITU-T NGN-GSI architecture was standardized in

Recommendation Y.2012, “Functional Requirements and architecture of the NGN”.

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NGN – ITU-T Standard. Source: Y.2012.

Next Generation Networks Main features of NGN-GSI (1/3):

Decouples transport from services and applications.

Application gateways provide third-party applications access to exposed NGN capabilities through the ANI.

Uses IP as the main transport protocol (everything over IP).

Provides support to a diversity of access and core technologies (IP over everything).

Media transference as well as control and management information are controlled directly by the “Transport Control Functions” based on information from the “Transport User Profiles.”

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Provides integrated QoS control, traffic and security management.

Admission control involves verifying authorization based on use profiles, SLA (Service Level Agreement), operator rules, service priority and resource availability in core and access segments.

The “Service Control Functions” are componentized, i.e., new service control components can be implemented in future releases and deployed to provide new functionality.

“Service Control Functions” include gateway controllers and SIP proxies (very similar to IMS).

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SIP message routing creates an overlay over IP routing.

Virtually every service depends on SIP proxies and session establishment.

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New Generation Networks

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What about the main features that are common in Future Internet Design approaches?

New Generation Networks Main features of NwGN (1/4):

Mobility and Ubiquity Refer to anywhere/anytime communications wherever/whenever a

person (or an object) is.

Capacity, reliability and availability Refer to network features to provide the services required by the users

and, security and privacy refer to safety in using the network.

Real-virtual world integration Aims at contextualizing real world information to enhance virtual world

services and applications.

Network Enabled Devices with Internet access form what is being called Internet of Things.

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Generality It is to provide means to use generically network substrate (hardware)

resources, such as transport, storage and processing capabilities.

This can be implemented by means of virtualization techniques.

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Content/Information-centrism It means the ability to handle content/information itself as a first-class

citizen in the architecture.

Service-centrism Can be referred as the capability of handling services themselves as

addressable entities in the architecture, pushing the principles behind Service-Oriented Architectures (SOA) to be at the core of future inter-networking.

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Autonomic networking It is the so-sought attribute that could minimize human activity in

network operation.

The idea is to design networks capable to self-manage, self-control, self-optimize, self-configure, self-heal, etc., generically speaking, networks with self-* properties.

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Comparison

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Conclusion Both developments have different timing scopes.

There is a need for steering networking research agendas.

Migration, interoperability and co-existence need more investigation.

NwGN constitute a never-ending set of promissory solutions for these limitations and others, but currently lacks on integrated proposals.

Overarching and pragmatic research steps seem necessary to convey the requirements and incentives of the multiple parties.

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ITS 2010 - Extended presentation slides

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