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MWIF Gap Analysis

MWIF Gap Analysis. MWIF BOD Led Core Network Standard Initiative Nov. 13th, 2001. Contents. Overview of 3GPP/3GPP2/MWIF NRAs Brief comparison of 3GPP and 3GPP2 legacy components Comparison of functionality of 3GPP/3GPP2/MWIF Core Network Reference Architectures Summary of Gaps.

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MWIF Gap Analysis

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  1. MWIF Gap Analysis MWIF BOD Led Core Network Standard Initiative Nov. 13th, 2001

  2. Contents • Overview of 3GPP/3GPP2/MWIF NRAs • Brief comparison of 3GPP and 3GPP2 legacy components • Comparison of functionality of 3GPP/3GPP2/MWIF Core Network Reference Architectures • Summary of Gaps

  3. Multimedia IP Networks Multimedia IP Networks 3G-SGSN 3G-GGSN UTRAN BSS/ GERAN MSC Server G-MSC Server 3G-HLR 3G-HLR 3G-HLR CSCF MGCF BGCF CSCF Emergency Services Network Fundamental requirement to support evolution from current GSM Circuit switched and GPRS Packet switched network in support Of an IP Multimedia Domain for IP based services support for UMTS. *this diagram has been modified from that in the specification for illustrative purposes. Any inaccuracies are unintentional 3GPP Network Reference Architecture – R5* Applications & Services Mm IP Multimedia Subsystem Mw SCP Mg Legacy mobile signalling Network T-SGW Mj Mi Cx Mc CAP Mr Ms PSTN/ Legacy/External Gi MRF MGW UMS R-SGW HSS Mb Gi Gi Gr CS Domain Gc Gn Application Lg Service Gi PS Domain GMLC Control Transport RAN Signaling only User Data and Signaling MT TE

  4. IP Network PSTN MAP 41 & GSM 3GPP2 All IP Network Reference Architecture Application Service Application Databases EIR DSI Sub Poli 2 5 6 Service 8 Roaming Signaling Gateway Subscription QoS Manager Network Capability Gateway 11 13 14 10 Control Trunk Signaling Gateway 1 9 12 Position Server AAA 26 4 Session Control Manager 16 15 24 Transport 25 17 20 21 Media Gateway Control 23 Core QoS Manager 18 3 29 Position Determining Entity 28 CDMA selection for Packet Switch support was much more Internet friendly than the GSM GPRS choice. Thus, the CDMA All IP architecture (aka 3GPP2) defines more discrete IP based functional elements. 27 30 19 Media Resource Function Access Gateway FA/ Attendant Media Gateway 34 33 Access Net. 31 32 BSC + PCF BTS 36 35 38 37 40 MM 22 Mobile IP Home Agent Border Router 43 42 Other Access Networks 44 41 45 47 39 MS Legacy MS Domain Support 46 Signaling-Control 48 Bearer Radio

  5. INTERNET Intranet PSTN MAP 41 & GSM Enterprise MWIF NRA (MTR-004v2.0) Directory Services Application Functional Entities Resource Directory Policy Repository Profile Server Core Network Application(s) 3rd Party Application(s) Location Server Global Name Server Application Geographic Location Manager Service Discovery Server AAA Functional Entities Service Authentication Server Authorization Server Accounting Server Control Communications Session Manager (CSM) Home Mobility Manager Multimedia Resource Controller Resource Manager Transport Session Proxy Session Anchor Home IP Address Manager Multimedia Resource Function Media Gateway Controller MWIF’s objective was to define an Access Independent Core Network architecture based on IP. Access Gateway Mobile Attendant Transport Gateway Functional Entities Access Transport Gateway i l Signaling Gateway IP Gateway Media Gateway IP Address Manager Bearer Access Network Signaling-Control Terminal UIM

  6. Functional Comparison of 3GPP & 3GPP2-Legacy

  7. Functional Comparison of 3GPP-3GPP2-MWIF

  8. Functional Comparison of 3GPP-3GPP2-MWIF

  9. Functional Comparison of 3GPP-3GPP2-MWIF

  10. Summary of Gaps • Areas with largest gaps: • Legacy support – support for this in a generic manner isn’t possible due to differences in signaling mechanisms, databases, etc. Requires specific protocol inter-working elements. • Mobility support – in order to support heterogeneous access across the different networks (and with additional flavors of access networks), an access independent Mobility mechanism (e.g. IETF Mobile IP based) would be needed to be supported by 3GPP.

  11. Summary of the Gaps • Areas with gaps that could prove significant: • The degree to which 3GPP and 3GPP2 deviate or require additions to the IETF SIP protocol could further increase the delta between the 2 networks. • Common mechanism for Geographic Location across the networks (access independent) for support of such things as Emergency calls. • Subtle differences in functional elements like MRF increases the likelihood of services and applications NOT being consistent across the platforms. • Lack of a more formalized AAA infrastructure in the IM Subsystem for 3GPP increases the likelihood that this functionality is not clearly separated from Session Control, Databases (and even areas like Service Authorization).

  12. Summary of the Gaps • Areas with workable gaps: • QoS mechanisms and control flow in an access independent manner where possible (with alignment to IETF mechanisms).

  13. Conclusion and next steps • Create a set of operation and business requirements from MWIF’s gap analysis for harmonization • Utilize requirements to formally and informally influence standardization – Initial activities will include: • Provide operation and business requirements for OHG’s harmonization meeting in 1Q02 • MWIF operators will work behind the scenes to proactively garner support for the requirements • Develop realistic incremental steps to meet harmonization requirements

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