IMS tutorial

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IMS tutorial

  1. 1. October 11-13, 2006 • San Diego Convention Center, San Diego, CA IP Multimedia Subsystems: A Tutorial C.V. Chakravarthy EMBARQ Corporation Overland Park, Kansas Cadathur.Chakravarthy@Embarq.com www.imsexpo.com
  2. 2. Agenda • Definition of IMS – Features & Benefits – Standards Support & Timeline – Architecture – Elements of Core IMS • IPv6 requirements for IMS • IMS and Service Delivery Platforms (SDP) • IMS for wire-line carriers • References www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  3. 3. What is IMS • What is IP Multimedia Subsystem (IMS)? • An Architecture for real time multimedia (Voice, Data , Video and Messaging) services using a common IP network. It defines a layered architecture • Relies solely on SIP as the primary Session Control Protocol (Some interfaces may use H.248 etc.) • Developed initially by the 3GPP (GSM community) standards group. • The core IMS elements use IP only. • The original 3GPP specification assumed a wireless access network and mandated the use of IPv6 alone (because of the number of end points that must have IP addresses) www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  4. 4. What is IMS • Later releases relaxed this requirements to include IPv4, though the ultimate goal is to still use only IPv6. • Other organizations adopted the IMS design with slight modifications. – 3GPP2, European Telecommunications Standards Institute (ETSI)’s Telecoms and Internet converged Services & Protocols for Advanced Networks (TISPAN) group, Alliance for telecommunications Industries Solutions (ATIS), Packet Cable , Open Mobile Alliance to name the major efforts. • TISPAN laid emphasis on the need to support wire-line in addition to wireless access. • 3GPP releases now are access agnostic i.e. not confined to wireless access alone. www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  5. 5. What is IMS • The intelligence is pushed to the end device making it easier to create new services. • Is IMS absolutely necessary ? – No. Most of the services can be offered without IMS. – However using IMS may make the process less expensive, shortens the deployment time frame. – Much easier to have 3rd party developed applications to be offered. – Next Generation services like Fixed/Mobile convergence are much easier with IMS. – Initial outlay will be expensive, especially in the transition period, requiring Media gateways, Signaling gateways etc. www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  6. 6. IMS Requirements • 3GPP TS 22.228 – High-level requirements • Negotiable QoS for IP multimedia applications – At session establishment and during session • End-to-end QoS for voice – A quality equal to or better than that of mobile CS voice call – Roaming • Inter-operator QoS negotiation • Use services provided by home- and by serving network • Mandatory default set of media types to ensure interoperability – Codec (audio: AMR, video: H.263), header compression – Access independence (GPRS, fixed, LAN) – Support for session-oriented non-3GPP Internet apps www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  7. 7. Pros • Transport, Control & Applications are separated into independent layers • Access agnostic. • Same application runs over many different infrastructures • Deploy real-time applications to be deployed along with ensuring QoS, customized billing, using SIP as the main signaling protocol. • Quicker & cheaper to enable new applications www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  8. 8. Cons • Complex Service Delivery in IMS • Significant Capital outlay for the Service Provider (The expectation is that this is offset by the efficiencies & speed to market) • Diverse Access technologies: xDSL, Radio Network etc. • SIP does not currently support Gaming, Video on Demand, IPTV etc. • Interconnection among layers (Network, service ) is not easy to manage • Billing is complex www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  9. 9. 3GPP Time Line • Pre IMS Releases – Release 99 March 2000 – Release 4 Q2 2001 • IMS Releases – Release 5 March-June 2002 – Release 6 3Q 2005 – Release 7 (Various Specs being released in 2006) www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  10. 10. Support for IMS from other Bodies • 3GPP2 (CDMA community) - 3rd Generation Partnership Project 2 – 3GPP defined the IP Multimedia Subsystem (IMS) – 3GPP2 defines almost that same architecture but calls it Multimedia Domain (MMD). • OMA - Open Mobile Alliance – Defining services for IMS architecture, e.g. Instant Messaging, Push-to-Talk • ETSI - – TISPAN Release 1 is an architecture similar to IMS, but specifically includes support for Non-SIP based applications (e.g. Gaming, P2P applications, IPTV, VoD etc.) www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  11. 11. IMS Support • ITU - International Telecommunication Union – Defines many of the protocols used by IMS – H.248 for media control – Q.1912.SIP for SIP – ISUP inter-working (in conjunction with IETF) • ATIS - Alliance for Telecommunications Industry Solutions – Addressing end-to-end solutions over wire-line and wireless – Nearing agreement to use 3GPP/3GPP2 IMS • Packet cable –Support for IMS from Packet Cable 2.0 onwards www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  12. 12. IMS-NGN Timeline ATIS NGN FG ITU-T NGN FG TISPAN R1 R2 –’07, R3 ‘09 3GPP2 MMD Update 3GPP Release 7 3GPP IMS Release 6 3GPP IMS Release 5 3GPP2 MMD 3GPP Release 4 2000 2001 2002 2003 2004 2005 2006 www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  13. 13. IMS Architecture IM-SSF: IMS Service Switching Function Service AS- Application Server SIP-AS IM-SSF OSA-SCS CSCF = Call SCS Service Capability Session Control Server Function MRF = Media MRF Resource Function BGCF = Border Gateway CSCF Control Function HSS Home Subscriber BGCF Service Control HSS MGCF = Media SLR MGW Media Gateway Control MGCF gateway SLF Core IMS Subscriber Function Location SIP-T/BICC HLR Home Function SGW MGW HLR Location Registry SGW Signaling GGSN gateway GGSN: Gateway PSTN P2G/3G GPRS Support Wireless Node NW SD meridian Ptr Feature Protect ABC DEF 1 2 3 Line 1 C onf./Trans GH I JKL M NO 4 5 6 PRS TU V WXY Line 2 Last No. 7 8 9 QZ * 0 # Line 3 C all Fw d. Line 4 Intercom Page H andfree Mute www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  14. 14. 3GPP/TISPAN IMS architecture Rr/Ro IMS Elements Sh HSS, Application Server Charging Function Dh TISPAN Additions ISC Cx SLF Cx Dx Rf/Ro Mw S-CSCF Ia S-CSCF = Serving CSCF Mw IWF I-CSCF Mw I-CSCF = Interrogating CSCF /Mk Mi /Mm Mi Ib P-CSCF = Proxy CSCF BGCF IBCF Ic P Mr Mg SI Mw SEG Other IP Network Mj SGF Id UE P-CSCF - MRFC MGCF SGW Gm Ie PSTN/ISDN If Gq Mp Mn NASS PDF RACS RACS H.248 H.248 H.248 H.248 MRFP T-MGF A-BGF SGW I-BGF I-BGF IP transport (access and core) www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  15. 15. Convergence as it is today Old Model Current move to Triple Play T V I C I E Back Office o N D N L I T I Applications P H M P T E E P / S A S E V C R T I / T R I Service Delivery D A V G N N S Session Control M C S E I A T M T O TDM N Transmission +IP/MPLS Transmission NW meridian SD Terminals Ptr Feature Protect ABC DEF 1 2 3 Line 1 Conf./Trans GH I JKL MN O 4 5 6 Line 2 Last No. PRS TUV WXY 7 8 9 QZ # * 0 Line 3 Call Fwd. Line 4 Intercom Page Handfree Mute www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  16. 16. Pure IMS Vision Collaboration Collaboration CCF = Call Presence Presence Control Function IPTV IPTV VoIP VoIP CGF = Charging Back Office Gateway CCF/CGF Function Applications SIP SIP SIP Service Delivery Session Control = S-CSCF Diameter HSS SIP P-CSCF Transmission Transport Terminals SIP User Agents www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  17. 17. Major Protocols used in IMS SIP Application OSA CSE (SCP) Application Servers ER) Sh (DIAMET Server Si IM-SSF OSA-SCS ) (SIP IS C HSS Sh (DIAMETER) ) (SIP Cx ( D ISC IP) BGCF IAME TE R Mi (S ) P-CSCF S-CSCF I-CSCF Mw (SIP) IP) Mw (SIP) Mr (S Mg (SIP) Mw (S MRF SIP-T Gi (IP) MGW MGCF T-SGW H.248 BICC IP) IP Gi ( ) ) TDM (SS7 CC GGSN P/BI P-CSCF Home Access IP ISU Network Visited IMS Network PSTN/PLMN IP Network GGSN Visited Access PSTN = Public Switched Telephone NW Network PLMN = public land mobile NW www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  18. 18. IPv6 Support • Originally IMS mandated IPv6 only (IMS Release 5) – However all end points & network elements are mostly IPv4 – So requirements relaxed to include IPv4 (Release 6) – Still the goal is for IPv6 only and this is consistent with the need for end to end operation (Public or private) without NAT • Some form of IPv4/IPv6 inter-working will be necessary, if possible without compromising end to end security. www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  19. 19. IPv6 Support • IMS nodes must support IPv6 • GGSN (Gateway GPRS Support Node) must run IPv6 on its Gi interface • SGSN (Serving GPRS Support Node) modifications necessary to store IPv6 addresses • RNC may need to support IPv6 header compression • IPv6 packets can be tunneled through access network using IPv4 • Capability for inter-working IPv6 and IPv4 critical www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  20. 20. IPv6 requirements Legacy Mobile Applications Signaling NW & Services R-SGW v6 Multimedia IP I-CSCF v6 NW Ms Mw Mg HSS v6 S-CSCF v6 Gi EIR Mr MRF v6 T-SGW v6 Gf Gr Gi MGCF v6 SS7 UTRAN SSGN GGSN v6 Iu Gn Mc PSTN/Legacy TDM External MGW v6 www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  21. 21. IMS with Minimum IPv6 support Legacy Applications CSCF v6 Mobile & Services v6 Signaling Mw IPv4 Mn R-SGW v4 NW HSS NAT-PT v4/v6 Ms v4 Mm Cx Multimedia Mg MGCF v4 IP Network EIR v4 CSCF v4/v6 Gr Mr T-SGW v4 MRF v6 Gi Gi Gf Gi Mc Gi SGSN v4 GGSN v4/v6 MGW v4 PSTN Gi NAT-PT www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  22. 22. IPv6 in IMS • Introduction of SIP-based peer-to-peer services is an important step after current client-server based services. • IP Multimedia Subsystem (IMS) is a service infrastructure based on the use of Session Initiation Protocol (SIP). – 3GPP Release 5 and 6 specifications – 3GPP2 specifications • In order to make peer-to-peer services work between different operators' networks, IPv6 is needed - peer-to-peer services work well only with public IP addresses. – Small scale IMS deployment / piloting can be started with IPv4. – IPv6 is vital for wider scale, global IMS deployment. www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  23. 23. IPv6 in IMS • Today’s Internet is predominantly IPv4-based • Mobile Multimedia services based on IMS will aim to interoperate with emerging Internet network services (SIP Internet Clients) • Early IMS Systems will support IPv4 • Other IMS systems will support dual-stack (IPv6 and IPv4) • IMS will need to support IPv6-IPv4 inter-working www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  24. 24. IPv6 in IMS • The problem seems simpler if one considers inter-working between IPv4-only systems and dual-stack (IPv6 & IPv4) systems – IPv4 is always minimum common denominator, no translation – Still needs some SIP/SDP features like ALT (and potentially ICE) for mobiles to offer both IPv6 and IPv4 address to peers • A more complete IPv6-IPv4 inter-working is needed – Two main approaches being considered for IPv6 IMS mobile to IPv4 IMS mobile communication: – Classical SIP/SDP/IP Header Translation (i.e. a “translator” replacesIPv6 addresses with IPv4 addresses or vice versa) – More end-to-end mechanism to enable security www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  25. 25. IP version Inter-working DNS S-CSCF I-CSCF HSS Mx Mx Signaling P-CSCF Bearer g lin IMS-ALG g na Si Ix IPv4 IPv4 SIP SIP IP IP NW NW Connectivity GGSN Connectivity UE IPv6 Access Access Tr-GW Network Network Translation Gateway www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  26. 26. Service Delivery Platform (SDP) • The SDP is a software architecture that enables rapid deployment of services • The service provider can plug in various applications into a common management system. • These can be home grown or supplied by a third party. – SDPs exist in some form or other in all Telecomm Services, but are probably dedicated to a specific service. – Next generation SDPs support multiple services and enable convergence – Microsoft’s Connected Services Framework (CSF) An SDP must be capable of supporting any business model. www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  27. 27. Traditional SDP Vs Next Gen SDP Gaming Text Messaging IPTV Gaming Text Messaging IPTV Services Services Services Services Control Control Control Control Transport Transport Transport Transport Traditional NG-SDP • Horizontal layered model • Any Service on any Network • Supports any given business model www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  28. 28. Role of an SDP Services (Service End User Provider supplied & Third Party (SDP) Supplied) Internet Wireless Phone Service Wire-line Phone Creation, E mail, SMS, SMS Delivery, News, Weather Messaging Management Gaming, Music, Entertainment Ring Tones etc. www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  29. 29. SDP Business & Operation Support Systems Content & Applications Service Delivery Platform Core & Access network www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  30. 30. SDP and IMS • SDP can be used with non IMS (i.e. non-SIP) architectures as well. • Full fledged IMS and SDP have overlaps. • IMS architecture promises the same thing as does an SDP i.e. rapid deployment of new services and support for billing etc. • An operator will most likely deploy an SDP before migrating to full IMS. www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  31. 31. SDP and IMS • In the interim the SDP will enable the co-existence of traditional and new packet based services. • IMS will reuse the common elements of an SDP like content delivery and the associated interfaces, Billing and management functions, inter-working of legacy & new services. • Deploying an SDP is just the first step towards a migration to IMS. www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  32. 32. IMS for Wire-line Providers Voice, Data, Private 1. The first step in the migration will be to Line. FR/ATM cap the growth of the NW for traditional services like FR & ATM. 2. Transition those to an IP/MPLS core VoIP, IP/MPLS build using Pseudo wires by starting the build- out, IP Centrex out of the IP core 3. Start to offer IP Centrex services FMC, Minimal IMS, 4. Deploy Fixed Mobile Convergence Anywhere Access, More IP centric NW 5. IPTV and other Multimedia services will push the growth of the IP network (May need the deployment of VDSL2 that is IP IPTV, MM Services based (IP DSLAMs etc.) 6. Convert lines to VoIP as per the business plan. Full IP (Access & Core) 7. Move to a full IP core as soon as feasible www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  33. 33. References • 3G PP Specifications http://www.3gpp.org/specs/specs.htm • 3GPP2, “All-IP Core Network Multimedia Domain” http://www.3gpp2.org/Public_html/Misc/X.P0013-016- 0_VV_Due_30_October-2006.pdf • http://www.motorola.com/networkoperators/flash/ims-flash.swf • Gonzalo Camarillo, “The 3G IP Multimedia Subsystem (IMS) Merging the Internet and Cellular Worlds”, John-Wiley & Sons, 2004 • “Application Services in an IP Multimedia Subsystem” www.dataconnection.com/inetapps/download/imsapps.pdf www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  34. 34. References • Amit Mukhopadhyay, “IP Multimedia Core Network Subystem” www.ewh.ieee.org/r1/njcoast/events/IMS.ppt • D Boswarthick, “Helping NGN become a reality” www.etsi.org/ABOUT_ETSI/30_minutes/documents/Sem30-01.ppt • “IP Multimedia Subsystems (IMS) Functional Architecture, ETSI ES 282 007 V1.1.1 (2006-03)” http://webapp.etsi.org/action/MV/MV20060526/es_282007v010101m.pdf#s earch='TISPAN%20NGN%20Functional%20Architecture%20release%201‘ • Brough Turner “Fixed Mobile Convergence” http://www.nmscommunications.com/file/WebinarNov05FixedMobileConve rgence.pdf www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  35. 35. References • George Kontopidis, “Demystifying IMS” http://www.nmscommunications.com/webinar/webinar071106/WebinarJul0 6DemystifyingIMS.pdf • “IMS and SDPs must work together” www.lightreading.com/document.asp?doc_id=85361&WT.svl=news1_1 • Ulf Olsson, “Towards an all IP Vision” http://www.ericsson.com/ericsson/corpinfo/publications/review/2005_01/01 6.shtml • Karim El Malki, “Mobile Multimedia Opportunities (IMS) and IPv6-IPv4 Interworking” www.sicta.ch/files/pdf134.pdf?4593 • “Diameter Session Initiation Protocol (SIP) Application” http://people.nokia.net/~miguel/drafts/pre/pre-draft-ietf-aaa-diameter-sip- app-12.txt www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  36. 36. Interfaces and Protocols Interface IMS Elements Protocol Usage Cx S/I-CSCF, HSS DIAMETER S/I-CSCF to HSS message exchange SIP AS, OSA SCF, Dh IM-SSF, HSS DIAMETER Used by an AS to locate the correct HSS S/I-CSCF query to SLF for locating the Dx S/I-CSCF, SLF DIAMETER correct HSS Gi GGSN GGSN Gm UE, P-CSCF SIP UE to CSCF message exchange Go PDF, GGSN COPS Gq P-CSCF, PDF DIAMETER ISC S/I-CSCF, AS SIP CSCF to AS communication ISUP to SIP conversion between MGCF Mg MGCF, I-CSCF SIP and the I-CSCF Mi BGCF, S-CSCF SIP S-CSCF to BGCF message interchange Between the BGCF and MGCF on the Mj BGCF, MGCF SIP same IMS network. www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  37. 37. Interfaces and Protocols IMS Interface Elements Protocol Usage S/I-CSCF, IP IMS network to External IP network Mm NW None communication MGCF, IM- Mn MGW H.248/MeGaCo MGCF control of one or more MGW MRFC, Mp MRFP H.248/MeGaCo MRFC control of the MRFP S-CSCF, Mr MRFC SIP S-CSCF to MRFC communication Mw S/I/P-CSCF SIP Inter CSCF communication SIP AS, OSA Information exchange between SIP- Sh SCS, HSS DIAMETER AS/OSA SCS and the HSS Communication between HSS and IM- Si IM-SSF, HSS MAP SSF UE, SIP AS, OSA SCS, Ut IM-SSF HTTP UE Service related data. www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  38. 38. Glossary • 1 x EV-DO 1x Evolution-Data Optimized • 2G Second Generation Technology (GSM, iDEN etc.) • 3G Third Generation Technology (UMTS, 1x EV-DO etc.) • 3GPP Third generation Partnership Program (GSM based) • 3GPP2 Third generation Partnership Program 2(CDMA based) • AMR Adaptive Multi-rate (Codec) • AS Application Server • ATIS Alliance for Telecommunications Industry Solutions • ATM Asynchronous Transfer Mode • BICC Bearer Independent Call Control www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  39. 39. Glossary • BG(F) Border Gateway (Function) • BGCF Breakout Gateway Control Function • CAMEL Customized Application Mobile Enhanced Logic • CAP CAMEL Application Part • CCF Charging Control Function • CDR Call Detail Record • CGF Charging gateway Function • CODEC CODer-DECoder • CS Circuit Switching • CSF Connected Services Framework www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  40. 40. Glossary • CSCF Call Session Control Function • CSE CAMEL Service Environment • DHCP Dynamic Host Configuration Protocol • DNS Domain Name System • DSLAM Digital Subscriber Loop Access Multiplexer • ENUM E.164 Number • EIR Equipment Identity Registry • ETSI European Telecommunications Standards Institute • FMCA Fixed Mobile Convergence Alliance • FR Frame Relay www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  41. 41. Glossary • FTTN Fiber to the Node • FTTP/B/H Fiber to the Premises/Building/Home • GGSN Gateway GPRS Support Node • GMLC Gateway Mobile Location Centre • GUP Generic User Profile • HLR Home Location Registry • HSS Home Subscriber Server • I-BCF Inter-Connect Border Control Function • I-BGF Inter-Connect BGF • I-CSCF Interrogating-CSCF www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  42. 42. Glossary • IETF Internet Engineering Task Force • IMS-ALG IMS Application Level Gateway • IMSI International Mobile Subscriber Identifier • IPv4/v6 Internet Protocol version 4/version 6 • ISP Internet Service Provider • ISUP ISDN User Part • ITU-T International Telecommunications Union- Telecom Std • IWF Inter working Function • MAP Mobile Application Part • MGCF Media Gateway Control Function www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  43. 43. Glossary • MGF Media Gateway Function • MMD Multimedia Domain • MRF –C/P Media Resource Function-Controller/Processor MPLS Multi Protocol Label Switching • MVNO Mobile Virtual Network Operator • NAI Network Access Identifier • NAT-PT Network Address Translation-Protocol Translation • OSA Open Services Architecture • P-CSCF Proxy-CSCF • PDF Policy Decision Function www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  44. 44. Glossary • PDN Packet Data Network • PDP Packet Data Protocol • PEF Policy Enforcement Function • PLMN Public Land Mobile Network • PSTN Public Switched Telephone Network • QoS Quality of Service • RACS Resource and Admission Control Subsystem • RADIUS Remote Authentication Dial In User Service • RTP Real Time Transport Protocol • RTCP Real Time Control Protocol www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  45. 45. Glossary • SCS Service Capability Server • S-CSCF Serving-CSCF • SCIM Service Capability Interaction Manager • SDP Session Descriptor Protocol • SDP Service Delivery Platform • SEG Security gateway • SGSN Serving GPRS Support Node • SLF Subscription Locator Function • SSF Service Switching Function SGW Signaling Gateway • SGF Signaling Gateway Function www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  46. 46. Glossary • SIM Subscriber Identity Module • SIP/SIP-T Session Initiation Protocol/SIP-for Telephony SIP-S SIP Secure • SRTP Secure Real Time Prptocol • SSL Secure Socket Layer SS7 Signaling System 7 • Tr-GW Translation Gateway • THIG Topology Hiding Inter-network Gateway • TLS Transport Level Security • T-MGF Transport Media Gateway Function • UE User Equipment www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA
  47. 47. Glossary • UMTS Universal Mobile Telecommunications System • UTRAN UMTS Radio Access Network • VDSL2 Very High Data Rate Subscriber Loop2 www.imsexpo.com October 11-13, 2006 • San Diego Convention Center, San Diego, CA

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