Signaling System 7 (SS7) Message Transfer Part 3 (MTP3) - User Adaptation Layer (M3UA)
RFC 4666
Document | Type |
RFC - Proposed Standard
(September 2006; Errata)
Obsoletes RFC 3332
|
|
---|---|---|---|
Authors | Javier Pastor , Ken Morneault | ||
Last updated | 2015-10-14 | ||
Replaces | draft-ietf-sigtran-m3ua-implementors-guide, draft-ietf-sigtran-m3ua-v02 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 4666 (Proposed Standard) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Jon Peterson | ||
Send notices to | (None) |
Network Working Group K. Morneault, Ed. Request for Comments: 4666 Cisco Systems Obsoletes: 3332 J. Pastor-Balbas, Ed. Category: Standards Track Ericsson September 2006 Signaling System 7 (SS7) Message Transfer Part 3 (MTP3) - User Adaptation Layer (M3UA) Status of This Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited. Copyright Notice Copyright (C) The Internet Society (2006). Abstract This memo defines a protocol for supporting the transport of any SS7 MTP3-User signalling (e.g., ISUP and SCCP messages) over IP using the services of the Stream Control Transmission Protocol. Also, provision is made for protocol elements that enable a seamless operation of the MTP3-User peers in the SS7 and IP domains. This protocol would be used between a Signalling Gateway (SG) and a Media Gateway Controller (MGC) or IP-resident Database, or between two IP- based applications. It is assumed that the SG receives SS7 signalling over a standard SS7 interface using the SS7 Message Transfer Part (MTP) to provide transport. This document obsoletes RFC 3332. Morneault & Pastor-Balbas Standards Track [Page 1] RFC 4666 SS7 MTP3-User Adaptation Layer September 2006 Table of Contents 1. Introduction ....................................................6 1.1. Scope ......................................................6 1.2. Terminology ................................................6 1.3. M3UA Overview ..............................................9 1.3.1. Protocol Architecture ...............................9 1.3.2. Services Provided by the M3UA Layer ................10 1.3.2.1. Support for the Transport of MTP3-User Messages ........................10 1.3.2.2. Native Management Functions ...............11 1.3.2.3. Interworking with MTP3 Network Management Functions ......................11 1.3.2.4. Support for the Management of SCTP Associations between the ..................11 1.3.2.5. Support for the Management of Connections to Multiple SGPs ..............12 1.4. Functional Areas ..........................................12 1.4.1. Signalling Point Code Representation ...............12 1.4.2. Routing Contexts and Routing Keys ..................14 1.4.2.1. Overview ..................................14 1.4.2.2. Routing Key Limitations ...................15 1.4.2.3. Managing Routing Contexts and Routing Keys ..............................15 1.4.2.4. Message Distribution at the SGP ...........15 1.4.2.5. Message Distribution at the ASP ...........16 1.4.3. SS7 and M3UA Interworking ..........................16 1.4.3.1. Signalling Gateway SS7 Layers .............16 1.4.3.2. SS7 and M3UA Interworking at the SG .......17 1.4.3.3. Application Server ........................17 1.4.3.4. IPSP Considerations .......................18 1.4.4. Redundancy Models ..................................18 1.4.4.1. Application Server Redundancy .............18 1.4.5. Flow Control .......................................18 1.4.6. Congestion Management ..............................19 1.4.7. SCTP Stream Mapping ................................19 1.4.8. SCTP Client/Server Model ...........................19 1.5. Sample Configuration ......................................20 1.5.1. Example 1: ISUP Message Transport ..................20 1.5.2. Example 2: SCCP Transport between IPSPs ............21 1.5.3. Example 3: SGP Resident SCCP Layer, with Remote ASP .........................................22 1.6. Definition of M3UA Boundaries .............................23 1.6.1. Definition of the Boundary between M3UA and an MTP3-User .......................................23 1.6.2. Definition of the Boundary between M3UA and SCTP ...23 1.6.3. Definition of the Boundary between M3UA and Layer Management ...................................24Show full document text