Kỹ thuật IMS part 66

Evolution of IMS Idea of TISPAN NGN Support for a broad spectrum of services Conversational Streaming broadcasting messaging Internet Support for fixed and mobile network convergent services APIs Control Packet transport Core network DSL/ATM DSL/Ethernet CATV UTRAN/GPRS WLAN TISPAN NGN architecture: subsystems idea Applications Service Layer User profiles Other subsystems Core IMS Network Attachment Subsystem Other networks User Equipment PSTN/ISDN Emulation subsystem Resource and Admission Control Subsystem Transport Layer Transfer Functions Use of IMS in NGN TISPAN Specific for NGN Rf /Ro changes Sh AS Network NASS (Network Attachment Attachment Subsystem) Subsystem SIP Cx « Core IMS SLF Mw » S - CSCF Cx Rf/Ro Mw/Mk/Mm I - CSCF Mi IBCF Ic Mi Mj Mg MRFC Id MGCF Ie Mp Mn SGF PSTN/ISDN Gq Gm Ia IWF Other IP Networks Other IP Networks BGCF Mr P - CSCF Dx Mw Mw H.248 DIAMETER HSS Ib Core IMS If Dh ISC Charging Functions Resource and Admission Admission Control Subsystem) RACS (Resource and Control Subsystem A - BGF UE MRFP IP Transport (Access and Core) T -MGF I-BGF FG NGN –Release Service Stratum Application Functions User Profile Functions Other Multimedia Components … Streaming Services Service and Control Functions Other Networks PSTN / ISDN Emulation IP Multimedia Component Legacy Terminals Network Access Attachment Functions NAAF GW Customer Networks NGN Terminals Customer and Terminal Functions Access Functions Access Transport Functions Resource and Admission Control Functions RACF Edge Functions Core transport Functions Transport Stratum UNI QoS and QoS control aspects FG NGN Release NNI Partially Internet as a threat for operators   Plethora of available services and applications Openness to new services  VoIP, instant messaging, presence, videocommunication   P2P services   SIP extensions and other protocols Operator as transport infrastructure utility   E.g Skype and other applications Also in case of 3G – UMTS 90% IMS services and applications could be implemented without IMS IMS – opinions   IMS – defense of operators against open Internet An attempt at monetizing Internet and IP networks     „IMS = IP/Internet Monetizing System” ! IMS leaves control over services to operators QoS differentiation Charging based on type of service, QoS, access, content, etc NGN/IMS applications Service Brokers: The Definition A network element that efficiently manages service interaction and service composition and resides between the service layer and the converging network and is traditionally decoupled from the core switch and the service execution or service creation environment Purpose: To efficiently manage service interaction and network orchestration Key Functions: •IM-SSF •Reverse IM-SSF •SCIM •IN to IN Trigger Management •Protocol/Call Flow Management •Subscriber Data Management Interaction Position of a Service Broker Service Composition / Blending Innovation + Cost Reduction Introducing an independent Social Networking service (Community) to any legacy Prepaid user (residing either on Vendor or Vendor IN Prepaid system) In addition and in order to save costs on Prepaid IN, independent Bonus & Promotion services are used to offload the two legacy IN Prepaid systems IN Prepaid Vendor Bonus Voice Vendor 4b Community Vendor 4a Core Vendor 1 Core Vendor - A call is made The Service Broker decides which set of services to involve for that call - Community (Social NW) is invoked first to check if the call is made within the community (special announcements, pricing, barring rules may apply) - The Bonus & Promotion independent Service is then invoked to check if the call can be allowed for free or not (with max call duration) 4a - The call is allowed free of charge 4b - The call needs to be charged - The charged call goes on Protocol Conversion & NW Capabilities Exposure ANY Service to ANY User + Telco 2.0 / Web 2.0 Evolution  Initially deployed  IN Prepaid Vendor Bonus SMS Vendor   INAP CS1x CAP v3  Web Services (Parlay X)   CAP v2 Core Vendor INAP CS1x Core Vendor  Future   Usage Usage CAP X to CAP Y CAP to INAP CS1x INAP CS1x to CAP CAP to Web Services INAP to Web Services MAP to Web Services  CAP/INAP to SIP (re-IMSSF) SIP to CAP/INAP (IM-SSF) Any NW protocol to WS Full Service to Network Layer Integration Today         Bringing together disparate service layer platforms following rationalisation and/or acquisition Possible to offer same set of services to fixed and mobile subscribers Achieves inter-operator roaming for complex services Supports future migration needs through horizontal architecture approach Orchestration across multiple service layer domains Provide real-time service orchestration - not possible with ESB and BPEL technologies Faster launch of new and changed services Re-use of proven components/ services Migrating Towards NGN Service & Network Layers • Networks begin to migrate towards an all-IP core • Access layer evolves to broadband wireless and LTE • SDP’s now becoming commonplace • Hosted services and 3rd party exposure business models • Charging now on-line and in realtime • SOA/Web Apps in service compositions IP Core with Telecom and Web Convergence • Network core now all-IP, access layer continues to evolve to provide greater bandwidth and service reach • Convergence across networks and technologies including web components to build hybrid or mixed services • Horizontal set of capabilities both at network and service layer – removal of “stove-pipe” platforms • Creation of new telecom services using “uber building blocks – for faster composition of new services • Merging of boundaries between telecom and web worlds • Mash-ups of telecom services (in addition to telecom capabilities) with web applications Most popular web API „All time” Last weeks Telefonica FindUs!  Facebook (widget) finding friends using Google Maps  Integration of telco resources  User context   Location and presence Interaction with user  Source: Telefonica IM & click-to-call Find Us! - implementation Source: Telefonica Find Us! - implementation Source: Telefonica Deployment of IMS services  Who deploys IMS?   > 200 operators has pilot projects or tests Examples:      BT - 21st Century Network Telecom Italia Mobile BellSouth KPN TeliaSonera 21