SOFTSWITCH PROTOCOL INTERWORKING

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1 High Performance Switching and Routing IEEE Workshop 2003 SOFTSWITCH PROTOCOL INTERWORKING Gumier Matteo Customer Engineer

2 Status of packet network Best-effort traffic is highly growing, but the revenues are not enough to justify new investments Rapidly evolving customer expectations, migrating from single service to multi-service needs High pressure on Cost per bit requires Market needs something different 2

3 . a convergent Network New high grade services must be introduced to increase revenues and customers but they require a QoS Network while.. Optimizing operating efficiency Opportunity for packet networks to reduce costs Voice Data Leased Lines Mobile Video Unified Multi-service Carrier Class Scalable Evolvable Today s networks 21st Century New Public Network 3

4 The convergent network: providers requirements Service Control : Who s using the service What service is being used Usage based billing model Service Interworking Service Diffusion Carrier Class Solution Session Management Open standards Low cost new service introduction Interworking with existing network Network scalability Distributed Systems Meshed networks topology 4

5 The convergent network: a vehicle for the new services Carrier Class Marconi Softswitch: takes Control of the Service: User session control (MGCP, FWCP) Firewall & Gateways control guarantees the interworking with existing protocols and services, i.e.: Voice Protocols Data Protocols enhances Service Diffusion enabling traditional Voice Network integration and new service introduction 5

6 Firewall: control of the service To guarantee a Carrier Class Control of the Service, Marconi defined a new component called: Firewall Boundary between unsecure & secure IP Traffic is allowed through the Firewall under the control of the SoftSwitch Call Agent (FWCP) Guarantees quality of Service for each user Secures network against hacking, protects privacy of customers data, Policy usage of bandwidth by means of Pinhole concept NAT/PAT Supports Bandwidth Reservation protocol (RSVP) hundreds of calls (set up and clear down) per second 6

7 Firewall: bringing networks together A traditional Solution IN The Marconi SoftSwitch Solution controlled Area GW MFW ToIP Networks GW Voice Network GW MFW MFW POTS, ISDN, xdsl MFW SCA INTERNET BroadBand Access (xdsl, nx2mbit, Cable etc.) ASP etc IP Data Network 7

8 Firewall how it works Works with Call Agent to impose policies Provides Caller ID features to match PSTN Controls volumes of packets Application Firewall acts as proxy Signalling Protocol, MGCP, H.323, H.248, SIP Control Protocol, FWCP Packet Access Network Call Agent Firewall Control Protocol - Pinhole Control RGW MGCP Firewall Can t use pinhole or get to other IP address Management Billing/Stats. Controlled Area Firewall User B MGCP H RGW

9 Protocol Interworking User Authentication, Call Control E.164 Call Routing, Call Detail Record Generation, IP Address Translation Coord. Protocol Interworking Dynamic NAT/PAT Bandwidth Control IP Access Announcement System Firewall (MFW) POTS, ISDN, xdsl, Ethernet Gateway and and Firewall SoftSwitch Call Call Agent (SCA) IP Multi-protocol IP IP Transport Interworking MPLS, RSVP-TE Management Server Softswitch Zone PSTN Feature Set IN-SSP Service Support VPN Feature Set Network Manager Enables signalling connectivity between SCA and TDM signalling network Interface to the SS7, Q.931 Network Interface over IP to the SCA Signalling Gateway (SGW) Gateway (MGW) TDM Network Interfaces Performs media conversion between TDM and IP 9

10 Protocol Interworking complexity For performance reasons, Distributed and Dynamic Protocols are needed on the Edge Node (Intelligent edge), but technical and economical reason favor a Centralized Architecture Centralized Control and Distributed forwarding Marconi breaks this circle Controlling edge devices using a Centralized System, while offering a scalable and performing architecture. ToIP / Control Signalling Protocol (E.g. MGCP, H.323, H.248) E1 (TDM) Gateway Gateway Voice & Signalling Call Call Agent Agent IP IP Transport Transport Management Management System System Multimedia Flow Softswitch Billing System Gateway Gateway E1 (TDM) Voice & Signalling 10

11 Focussing Voice Services (1) target infrastructure for a Multiservice NGN situation today: majority of public voice services are TDM based, V.5 interfaces dominate in access networks voice-over-ip diffusion in corporate networks VoIP transport is starting to replace TDM class 4 near future: voice-over-data services are implemented cost reductions mainly in OPEX new services can be introduced faster and easier network intelligence is moving to the Edge 11

12 Focussing Voice Services (2) target infrastructure for a Multiservice NGN SoftSwitches wide usage: Access network elements are migrating to media gateways and get integrated into SoftSwitch systems IP-services dominate Legacy POTS, ISDN VoIP/ VoATM IADs feat. POTS/ ISDN VoIP Phone or PC VoIP IADs feat. POTS/ ISDN and/or VoIP phones IAD Private IP Network IP connection SGW and MGW functionality DSLAM Voice Data Video VoIP Access Gateway IP connection MGCP, H.248, IUA transport IP / MPLS Core 12 MGCP Pure Class 5 SoftSwitch System TGW PSTN

13 The convergent network: a vehicle for the new services Carrier Class Marconi Softswitch: takes Control of the Service: User session control (MGCP, FWCP) Firewall & Gateways control guarantees the interworking with existing protocols and services, i.e.: Voice Protocols Data Protocols enhances Service Diffusion enabling traditional Voice Network integration and new service introduction 13

14 High Performance Switching and Routing IEEE Workshop 2003 SOFTSWITCH PROTOCOL INTERWORKING Thank you

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