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PENGENALAN NGNPENGENALAN NGN

Sekolah Tinggi Teknologi Telkom

2007

Latar Belakang Kehadiran Softswitch

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Jaringan yang ideal adalah jaringan full packet (mulai Jaringan yang ideal adalah jaringan full packet (mulai dari tingkat access hingga core network), terintegrasi dari tingkat access hingga core network), terintegrasi (PSTN, PLMN, data), multi service dengan protokol open (PSTN, PLMN, data), multi service dengan protokol open standard, multi vendor dan mudah dikembangkan. standard, multi vendor dan mudah dikembangkan. Jaringan ini dikenal sebagai NGN (Next Generation Jaringan ini dikenal sebagai NGN (Next Generation Network)Network)

Untuk menuju NGN, pembangunan gerbang-gerbang Untuk menuju NGN, pembangunan gerbang-gerbang VoIP dianggap solusi yang bersifat parsial (tambal sulam) VoIP dianggap solusi yang bersifat parsial (tambal sulam) karena tidak dirancang untuk jangka panjang (long term) karena tidak dirancang untuk jangka panjang (long term) dalam tahapan evolusi/migrasi menuju NGN dalam tahapan evolusi/migrasi menuju NGN

Teknologi baru sebagai pengembangan VoIP yang Teknologi baru sebagai pengembangan VoIP yang dirancang mampu mengawaldirancang mampu mengawal menuju NGN, baik secara menuju NGN, baik secara smooth (bertahap) maupun radikal adalah teknologi smooth (bertahap) maupun radikal adalah teknologi softswitch.softswitch.

Mengapa Softswitch ?

Circuit-Switched

· Solutions come from a single vendor that supplied everythingin one proprietary box : software, hardware and applications

· Customer were locked – in to their vendor – no room for innovation, expensive to implement and maintain

Protocols APIsProtocols APIs

Open

APIs

Soft-Switched

Service & Applications

Call Control & Switching

Transpotrt Hardware

PROPIETARY

Services, Applications & Features (Management, Provisioning and

Back Office)

Softswitch Call Control

Transport Hardware

Protocols APIsProtocols APIs

Open

APIs

· Solutions come from multiple vendors, at a levels who supply open standards – based products

· Customer are free to choose best-in-class product to build their network. Open standards enable innovationand reduce costs

vs

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Berikut adalah beberapa kelemahan mendasar dalam Berikut adalah beberapa kelemahan mendasar dalam elemen switch pada jaringan circuit switched (TDM), elemen switch pada jaringan circuit switched (TDM), yang kemudian diperbaiki oleh teknologi softswitchyang kemudian diperbaiki oleh teknologi softswitch

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Overview• Definisi (Sun Microsystem)

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The precise definition of a Softswitch is somewhat controversial due to its numerous service offerings and implementation options.

Here is one general definition:

The Softswitch is a collection of products, The Softswitch is a collection of products, protocols, and applications that enable any protocols, and applications that enable any device to access telecommunication and/or device to access telecommunication and/or Internet services over an IP network.Internet services over an IP network.

Overview

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• Softswitch technology enables connectivity between the Softswitch technology enables connectivity between the Internet, wireless networks, cable networks and the Internet, wireless networks, cable networks and the traditional telephone networks.traditional telephone networks.

• TThe network convergence that can be achieved using he network convergence that can be achieved using Softswitch.Softswitch.

• Softswitch enables the Telephone network to Softswitch enables the Telephone network to communicate with the internet world, and vice versa.communicate with the internet world, and vice versa.

• The scheme of connectivity, directory numbering system The scheme of connectivity, directory numbering system and billing mechanism of the telephony world is made and billing mechanism of the telephony world is made available to other networks (including the internet) using available to other networks (including the internet) using Softswitch.Softswitch.

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• The traditional telephone network uses Class 5 and The traditional telephone network uses Class 5 and Class 4 circuit switches along with Time Division Class 4 circuit switches along with Time Division Multiplexing (TDM) technology to transport voice Multiplexing (TDM) technology to transport voice data. It also uses the SS7 signaling network to handle data. It also uses the SS7 signaling network to handle call setup and teardown, plus other functions.call setup and teardown, plus other functions.

• The traditional telephone network is integrated with The traditional telephone network is integrated with the IP network by using certain Softswitch the IP network by using certain Softswitch components, including Media Gateways (which move components, including Media Gateways (which move voice data between dissimilar networks) and voice data between dissimilar networks) and Signaling Gateways (which move call signaling data Signaling Gateways (which move call signaling data between dissimilar networks).between dissimilar networks).

• Typically, a privately managed IP network is used to Typically, a privately managed IP network is used to handle voice data. handle voice data.

• A privately managed IP network is similar to the A privately managed IP network is similar to the public Internet, except it provides a higher quality of public Internet, except it provides a higher quality of service for voice data, and is usually implemented service for voice data, and is usually implemented with IP over ATM technology.with IP over ATM technology.

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• The International Softswitch Consortium (ISC) is a body The International Softswitch Consortium (ISC) is a body represented by various technology leaders, represented by various technology leaders, telecommunication equipment manufacturers, ITU and IETF. telecommunication equipment manufacturers, ITU and IETF. ISC views Softswitch as a collection of technologies (not a ISC views Softswitch as a collection of technologies (not a specific product) that enable next generation specific product) that enable next generation telecommunication services based on open standards.telecommunication services based on open standards.

• This is quite different from the traditional model where This is quite different from the traditional model where services, call control and transport hardware are proprietary.services, call control and transport hardware are proprietary.

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Tipe Koneksi Panggilan

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•The telephone network follows the 10 digit numbering plan in the US, while the IP network uses naming conventions like Someone@Sun.com.

•Some of the types of call connections that Softswitches can support, for example :

•From a telephone to another telephone. Both the calling party and the caller is part of the Public Switched Telephone Network (PSTN).•From an IP telephone or a multimedia computer to a (PSTN) telephone. For example, Person@Sun.com might call 925-555-9360. This call traverses the IP network as well as the PSTN, and might be made with an Internet application such as Net2Phone. In such cases the IP network connects to the PSTN using gateways.•From a multimedia computer or IP telephone to a multimedia computer For example, Someone@Home.com might call a Person@Sun.com. This call remains within the IP networks, and might be made with applications such as NetMeeting, Internet Chat, or Instant Message. In this case the (PSTN) Telephone network is not used

Tipe Koneksi Panggilan– From a video conferencing terminal to a regular telephone

or a wireless phone.– From a PC to a two-way pager or a WAP-capable wireless

phone.• There are many other possible types of call connections or

message delivery mechanisms supported by Softswitch technologies.

• In the IP network, the Signaling information is carried over the TCP/IP for its reliable delivery, and the digitized voice is carried over UDP/IP for its delivery with low overhead.

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Komponen SoftswitchKomponen Softswitch

Komponen Utama

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A Softswitch can consist of one or more of these components.These functions can reside in one system or span across several systems. The later chapters in this paper will look at implementation decisions in more detail.

1. The Gateway Controller is one of the key functional units of the Softswitch. The Gateway Controller holds the call processing rules, but uses the Media Gateway and Signaling Gateway to perform the job. It is the responsibility of the Signaling Gateway to perform call set-up and teardown. In addition, it interfaces to the OSS and BSS systems. Often this unit is referred as Call Agent or Media Gateway Controller interchangeably. Sometimes the Call Agent by itself is referred as a Softswitch. This component communicates within other parts of the Softswitch and also the external networks using different protocols.

2. The Signaling Gateway serves as the gateway between the SS7 Signaling network and the nodes managed by the Softswitch in the IP network. A Signaling Gateway requires physical connectivity to the SS7 network and must be aware of the required protocol suites.

Komponen Utama• 3. The Media Gateway handles the voice media data payload (the digitized

samples of speech during conversation). In the future, video data will also need to be supported. In the current model, the Media Gateway must support connectivity to a TDM bus carrying voice media data to the Telco switch side. Applicable voice data encoding, decoding, and compression are also performed by the Media Gateway. It also supports legacy telephony (PSTN) interfaces and protocols such as CAS and ISDN.

• 4. The Media Server performs peripheral functions, to enrich the Softswitch with media capabilities. If required, it supports digital signal processing (DSP) resources. If IVR functionality is needed (eg: to prompt voice responses), those tasks would be performed by the Media Server. Video Media also would be served by a Media Server when applicable.

• 5. The Feature Server provides all the revenue generating features and services such as billing, multi-party conferencing, etc. The Feature Server uses the resources and related services located on other components of the Softswitch. It may also support certain services to meet certain implementation necessity e.g.: GateKeeper.

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Contoh implementasi softswitch

AGW (CMTS)

TGWPSTN

SGWSoftswitch

•xDSL•FTTB

Aplication Server

Packet Network

SS7

ResidentialGreen Field

AGW (CGW)

AGW (xDSL/IAD)

HFC

CDMAMSC

Internet

oss

Softswitch Implementation Configuration

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Summary

• NGN• Jaringan VoIP• PLMN• ISDN• ATM• Jaringan IP• IN

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