MATERI KULIAH 6 SP 2005 PENJASTEL

Next Generation Networks ( NGN ) Adapted from PT. INTI internal documents for teaching purposes

Next-G networks: Definitions Realization of Convergence of the telecommunication networks Realization of Convergence of the telecommunication networks Using Distributed Control Architecture instead of Traditional common control architecture Using Distributed Control Architecture instead of Traditional common control architecture

Traditional Networks CL5 Switch PSTN CL5 SwitchCL4 SwitchC4 Switch SS7 Network Corp PBX PRI IMT MSCPSTN CL5 Switch Traditional Networks: Separated Networks Traditional Networks: Separated Networks –Distinct services: voice, mobile, data –Different equipment for different services –Different regulations ISP Internet ISP ISP RAS Separated Networks

Traditional Networks Separated Networks DLC Central Office Switch PSTN Access Switch Point of Presence PSPDN PSTN uses a circuit-switched network to carry voice PSTN uses a circuit-switched network to carry voice –Proven, reliable, QoS, feature rich, intelligence is in network PSPDN uses a packet-switched network to carry data PSPDN uses a packet-switched network to carry data –Open interfaces, flexible bandwidth, lower costs, intelligence is in CPE

Traditional Networks This situation is expensive and inefficient: This situation is expensive and inefficient: –Many solutions are proprietary –Many resources are duplicated and cannot be shared –Separate management system for each network The future belongs to data networks but the money is in voice! The Data Network expands, but voice is still the main revenue-generator The future belongs to data networks but the money is in voice! The Data Network expands, but voice is still the main revenue-generator Problems

Data: Superior “Traffic Volume” Total Average Bit rate (Gbit/s) Source: Siemens

Voice: Key “Revenue Generator” Operator Revenues (billion DM ) 29 % 25 % 20 % Source: Siemens

Convergence Network Corporate Network PSTN ATM Core Internet Convergence Switch PRI End Office Switch IMT PRI Corp PBX IMT ATMISP RAS IAD End Office Switch The next-generation network seamlessly blends the public switched telephone network (PSTN) and the public switched packet data network (PSPDN), creating a single multi-service network. This is called convergence The next-generation network seamlessly blends the public switched telephone network (PSTN) and the public switched packet data network (PSPDN), creating a single multi-service network. This is called convergence Definition

Convergence Multi-service for the subscriber Multi-service for the subscriber –POTS services, Central Office switching »Telephony, Videoconferencing, VPN, Prepaid Cards, etc. –Packet data service, routing, traffic concentrating Cheaper to build and operate Cheaper to build and operate –Everything is based on open standards –No resource duplication –Single network management Traditional and new services can be accessed using the same devices Traditional and new services can be accessed using the same devices –Integrated devices for television, telephony, and personal computing Advantages

Convergence To fill the missing link between voice & data networks, you need wirespeed, cost efficient mediation devices at the junction points of networks, controlled by centralized intelligence of a powerful call and feature server To fill the missing link between voice & data networks, you need wirespeed, cost efficient mediation devices at the junction points of networks, controlled by centralized intelligence of a powerful call and feature server Missing Link Data Networks Voice Networks... Switch Intelligence is in network Intelligence is in CPE Proven Reliable QoS Feature Rich Multimedia Service Platform OpenI I/F Flexible bandwidth Lower costs

Convergence Examples Internet services delivered to TV sets via systems like Web TV Internet services delivered to TV sets via systems like Web TV Web casting of radio and TV programs on the Internet Web casting of radio and TV programs on the Internet Voice telephony over the Internet Voice telephony over the Internet Unified messaging: using one application for all communication needs Unified messaging: using one application for all communication needs –E.g. & voice mail opened with Outlook Express

Convergence Explosion in data traffic Explosion in data traffic –Internet traffic increases at a rate of almost 300% annually ( voice traffic growth: 5 % ) –Proliferation of bandwidth-intensive client/server application (e.g. multimedia streaming) –E-business applications –User demands for richer content Telecommunications deregulation Telecommunications deregulation –Opening up of telecommunications market to competition –Integration of various industries (TV, Internet, telephone) into one ‘information industry’ Reasons

Convergence Enabling Technologies The Internet The Internet –Connects everyone, everywhere –Originally designed only for transferring data, now also used for telephony & multicasting Broadband access technologies Broadband access technologies –Send and receive lots of data quickly –Enables multimedia-based communication Next-Generation Networks Next-Generation Networks –High-speed, packet based infrastructure with QoS guarantee –Built to integrate voice & data

Distributed Control Architecture Old Architecture: Old Architecture: –Larger –Centralized (common) –Expensive –Proprietary Intelligence ATM TDM IP Intelligence New Architecture: New Architecture: –Smaller –Distributed –Cheaper –Open

Circuit Switch (50,000 calls) Sonus GSX9000 (50,000 calls) Lower real estate costs Easier administration Reduced power requirements New Architecture: Smaller

Distributed Control Architecture Common Control Architecture ATM TDM IP –Proprietary H/W and S/W –Wait for generic S/W release to launch application/services –Long application development time –More applications, more revenues –Service creation at network edge, close to the customer –Lower cost, faster application development Open Distributed Architecture

ITU Layer Model of Next-G Network Access GW Mobile Packet Network IP or IP over ATM PhoneWAPCATV ANPSTNVoice-data Int access Core Network GW (SS7 Network) Gateway Call Server Central Service Server App Server OSS Control Signal to SS7 GW Softswitch APIs for 3rd party app development Control Signal to Internet GW Interconnect GW to the Internet CATVFixed Access Layer Service & Control Layer Transport & Connectivity Layer

PROPRIETARYPROPRIETARY Circuit-Switched Transport Hardware Call Control & Switching Services & Applications Soft-Switched Transport Hardware Softswitch Call Control Services, Applications & Features (Management, Provisioning and Back Office) Open Protocols APIs Circuit-switch vs. Softswitch Flexible distribution of switching functionality Flexible distribution of switching functionality Interoperability among functional elements Interoperability among functional elements Carrier selection of best-in-class components Carrier selection of best-in-class components Rapid introduction of innovative new services Rapid introduction of innovative new services Softswitch Objectives The Softswitch will play a strategic role in the next-generation public network infrastructure for voice, video and data communications

Softswitch Cellular Station Media Gateways IAD with DSL/Cable Modem Digital Cross Connect SS7 Gateway SS7 Application Servers Q.931/Q.2931 CPL SIP MGCP MEGACO SIP H.323 MGCP Softswitch Softswitch At Work