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SCCP User Adaptation Layer

SCCP User Adaptation Layer. 47 th IETF Meeting: Adelaide, Australia draft-loughney-sigtran-sua-00.txt John A. Loughney. Why. SCCP-users can run over IP. There are existing, proprietary solutions (i.e. - TCAP over IP).

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SCCP User Adaptation Layer

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  1. SCCP User Adaptation Layer 47th IETF Meeting: Adelaide, Australia draft-loughney-sigtran-sua-00.txt John A. Loughney

  2. Why • SCCP-users can run over IP. • There are existing, proprietary solutions (i.e. - TCAP over IP). • All IP 3G Networks are currently in development, which use application protocols over SCCP, but IP for transport. • Point-to-point and via Signaling Gateways. • Simplifies the protocol stack.

  3. How • Keep SCCP-User lower interface intact. • Allow protocol options. • Connection-less & connection oriented, etc. • Transfer SCCP-User messages over SCTP/IP. • CAP/TCAP, MAP/TCAP, RANAP, etc. • Allow flexible protocol & architectural implementation. • Support for distributed IP-based signaling nodes. • Inter-work with legacy SS7 networks.

  4. General Architecture Protocol Stack ******** SS7 *************** IP ******** * SEP *---------* *--------* * * or * * SG * * ASP * * STP * * * * * ******** *************** ******** +------+ +------+ | AP | | AP | +------+ +------+------+ +------+ | SCCP | | SCCP | SUA | | SUA | +------+ +------+------+ +------+ | MTP3 | | MTP3 | | | | +------| +------+ SCTP | | SCTP | | MTP2 | | MTP2 | | | | +------+ +------+------+ +------+ | L1 | | L1 | IP | | IP | +------+ +------+------+ +------+ | | | | +----------------+ +-------------+

  5. Signaling Gateway AS1 AS3 ASP1 ASP1 ASP2 ASP2 ASP3 AS2 ASP1 ASP2 AS4 ASP1 ASP2 General Architecture Example SCTP Associations SS7 Network Note: The Signaling Gateway may be realized as a cluster. Application Servers may be distributed as well.

  6. All-IP Architecture Protocol Stack ******** IP ******** * *--------* * * AS * * AS * *(ASP) * *(ASP) * ******** ******** +------+ +------+ | AP | | AP | +------+ +------+ | SUA | | SUA | +------+ +------+ | SCTP | | SCTP | +------+ +------+ | IP | | IP | +------+ +------+ | | +---------------+

  7. AS3 ASP1 AS1 ASP2 ASP1 ASP3 AS2 ASP2 ASP1 AS4 ASP1 ASP2 ASP2 ASP3 All-IP Architecture Example SCTP Associations

  8. Messages • Data Transfer Messages Data Transfer (DATRA) Data Acknowledge (DAACK) • Connection Messages connection request (CONRE) connection acknowledge (CONAK) release request (RELRE) release complete (RELCO) reset confirm (RESCO) reset request (RESRE) • Application Server Process Maintenance (ASPM) Messages ASP Up (ASPUP) ASP Down (ASPDN) ASP Active (ASPAC) ASP Inactive (ASPIA) ASP Takeover (ASPTO) Notify (NTFY) No Active ASP (NAASP) • SUA Management Messages Error (ERR) Audit (AUD) Stream Configuration (SCO) Stream Configuration Acknowledge (SCA) • SS7 Signaling Network Management (SSNM) Messages Destination Unavailable (DUNA) Destination Available (DAVA) Destination State Audit (DAUD) SS7 Network Congestion State (SCON) Destination User Part Unavailable (DUPU) • Other Vendor-Specific Message (VEND)

  9. To Do • Improve all-IP architecture. • Administrative resources for AS. • Avoid dual client & server ASP. • Specify in a more detailed way which protocols features are mandatory and those that are optional. • Add more use cases & examples. • Rework management messages. • Application Server Process Maintenance Messages. • SS7 Management Messages • Approve draft for WG status (yes / no)?

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