Ericsson IMS System Description

Ericsson Internal SYSTEM DESCRIPTION Prepared (also subject responsible if other)

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IMS System Description Contents 1

Revision Information ........................ ............................. ........................ 5

2

Introduction .................................................... ............................. ........... 5

2.1 2.2 2.3 3

Glossary............................ ............................. .............................. ........... 7

3.1 3.2 4

Purpose ........................................................ ........................... ........................................................... .............................. 6 Scope .............................................................................. ................................................. ........................................ ........... 6 General Reading Instruction ..................................................... ........................ ............................... 6 Terminology ....................................................... .......................... ..................................................... ........................ 7 Acronyms and Abbreviations ...................................... ............... 8

System Function Outline ............................. ............................. ........... 15

4.1 4.1.1 4.2 4.2.1 4.2.1.1 4.2.1.2 4.2.1.3 4.2.1.4 4.2.2 4.2.3 4.2.4 4.2.4.1 4.2.4.2 4.2.5 4.2.5.1 4.2.5.2 4.2.5.3 4.2.6 4.2.6.1 4.2.6.2 4.2.7 4.2.8 4.2.9 4.2.9.1 4.2.9.2 4.2.9.3 4.2.9.4 4.2.9.5

Allocation....................................................... .......................... ........................................................ ........................... 15 External Actors ......................................................... ............................ ............................................. ................ 17 Nodes ...................................................... ......................... ........................................................... ................................. ... 21 CSCF – Call Session Control Function .................................... 21 I-CSCF ................................................................... ...................................... ............................................... .................. 22 S-CSCF ........................................................ ........................... ......................................................... ............................ 23 E-CSCF (Emergency CSCF) ................................................... ........................... ........................ 25 BGCF (Breakout Gateway Control Con trol Function) Function ) ........................... .......................... . 25 EMA – Ericsson Multi Activation .......................................... ............. ................................. .... 26 HSS – Home Subscriber Server .............................................. .................. ............................ 27 SLF......................................................... ............................ .......................................................... .................................. ..... 30 Redirect Agent ......................................... ............ .......................................................... ................................ ... 31 Proxy Agent ....................................................... .......................... .................................................... ....................... 31 MTAS – Multimedia Telephony Application Server .................. 31 MMTel AS .............................................. ................. .......................................................... .................................. ..... 34 SCC AS ....................................................... .......................... .......................................................... ............................. 34 Scheduled Conference Application Server .............................. ........ ...................... 35 IPWorks....................................................... .......................... .......................................................... ............................. 36 DNS Server ................................................................ ................................... ........................................... .............. 36 ENUM Server Serve r ......................................................... ........................... ................................................ .................. 37 MRFC – Media Resource Function Controller ......................... .................. ....... 38 HP-MRFP – Media Resource Re source Function Fun ction Processor ................... 39 SBG – Session Border Gateway .............................................. .......................... .................... 40 IWF – Inter Inte r Working Function .................................. ..... ............................................. ................ 42 Internal SPDF – Service Policy Decision Function .................. . ................. 42 IBCF – Interconnection Inte rconnection Border Control Cont rol Function ..................... 42 P-CSCF – Proxy Call Session Control Function ...................... .................. .... 43 C-BGF – Core Border Gateway Function and I-BGF – Interconnection Border Gateway Gatewa y Function ............................... 45 4.2.10 SE-BGF – SmartEdge Border Gateway Function .................... 45 4.2.11 MGC – Media Gateway Controller ........................................... ........................................ ... 46 4.2.12 IS-MGW ............................................................ ............................... .................................................... ....................... 47


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4.2.13 MRS – Media Resource Resou rce System .............................................. 48 4.2.13.1 IM-MGW ....................................................... .......................... ......................................................... ............................ 48 4.2.13.2 MRFP ................................................................................... ...................................................... ................................. .... 48 4.2.13.3 BGF ........................................................ ........................... ........................................................... .................................. .... 49 4.2.14 PGM - Presence, Group and Data Management ..................... 50 4.2.14.1 AP4.2.14.1 AP- Aggregation Proxy....................................................... .......................... ................................... ...... 51 4.2.15 MSP – MultiService Proxy ....................................................... .......................... ............................... 52 4.3 Interfaces and Protocols ......................................................... ............................ ............................... 55 4.3.1 Provisioning Interfaces ...................................................... ......................... .................................... ....... 55 4.3.1.1 PR-1 (LDAP) .................................................... ....................... ..................................................... ........................ 55 4.3.1.2 PR-2 (LDAP) .................................................... ....................... ..................................................... ........................ 55 4.3.1.3 PR-3 (CAI3G) ........................................................ .......................... ................................................. ................... 55 4.3.1.4 PR-5 (CLI) ............................................................ ............................... ................................................. .................... 55 4.3.1.5 PR-6 (CAI3G) ....................................................... .......................... ................................................. .................... 55 4.3.2 Self Administration interfaces ................................................... ............................. ...................... 55 4.3.2.1 Ut (XCAP) ...................................................... ......................... ....................................................... .......................... 55 4.3.3 DNS/ENUM interfaces ..................................... ........ ..................................................... ........................ 56 4.3.3.1 DN1 (DNS) .............................................................. ................................. .............................................. ................. 56 4.3.3.2 DN2 (DNS) .............................................................. ................................ ............................................... ................. 56 4.3.3.3 DN3 (ENUM) ................................................................ .................................. .......................................... ............ 56 4.3.3.4 DN4 (ENUM) ............................................................... .................................. .......................................... ............. 56 4.3.4 Charging interfaces .................................................................. ...................................................... ............ 57 4.3.4.1 Rf (Diameter) ......................................................... ............................ ................................................ ................... 57 4.3.4.2 Ro (Diameter)........................................................ ........................... ................................................ ................... 57 4.3.5 Signaling interfaces .......................................................... ............................. ..................................... ........ 57 4.3.5.1 CDS1 (Diameter) ........................................................ ........................... ........................................... .............. 57 4.3.5.2 CNS1 (SOAP or SIP) ............................................. .................. 57 4.3.5.3 CS NNI (SS7) ........................................................ .......................... ................................................. ................... 57 4.3.5.4 Cx (Diameter) ........................................................ .......................... ................................................. ................... 57 4.3.5.5 CAP (SS7)....................................................... .......................... ...................................................... ......................... 58 4.3.5.6 CCMP (HTTP) ...................................................... ......................... ................................................. .................... 58 4.3.5.7 Dh (Diameter) ...................................................... ......................... .................................................. ..................... 58 4.3.5.8 Dx (Diameter) ...................................................... ......................... .................................................. ..................... 58 4.3.5.9 Dz (Diameter) ...................................................... ......................... .................................................. ..................... 58 4.3.5.10 Dzx (Diameter) ......................................................... ............................ ............................................. ................ 58 4.3.5.11 e2 (Diameter) ................................................. .................... ....................................................... .......................... 58 4.3.5.12 Gi (RADIUS)....................................................... .......................... ................................................... ...................... 58 4.3.5.13 Gm (SIP) ........................................................... .............................. .................................................... ....................... 59 4.3.5.14 H.323 NNI ................................................................................ 59 4.3.5.15 Ia (H.248) ..................................................... ....................... .......................................................... ............................ 59 4.3.5.16 I2 (SIP) ........................................................ ........................... .......................................................... ............................. 59 4.3.5.17 Ic (SIP) ....................................................... .......................... ........................................................... .............................. 59 4.3.5.18 If-1 (MAP) ......................................................... ............................ ..................................................... ........................ 59 4.3.5.19 If-4 (H.248) ....................................................... .......................... ..................................................... ........................ 59 4.3.5.20 ISC (SIP) ..................................... ............................................. .............................. ............... 59 4.3.5.21 Ma (SIP) ...................................... ............................................. ............................. ................ 60 4.3.5.22 Ml (SIP or HTTP/SOAP/XML) .................................................. ....................... ........................... 60 4.3.5.23 Mg, Mi, Mj, Mk, Mm, Mx (SIP) .................................................. ............................ ...................... 60 4.3.5.24 Mn (H.248) .......................................................... ............................. .................................................. ..................... 60 4.3.5.25 Mp (H.248) .......................................................... ............................. .................................................. ..................... 61 4.3.5.26 Mr (SIP) ......................................................... ............................ ........................................................ ........................... 61 4.3.5.27 Mw (SIP) ........................................................ ........................... ....................................................... .......................... 61


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4.2.13 MRS – Media Resource Resou rce System .............................................. 48 4.2.13.1 IM-MGW ....................................................... .......................... ......................................................... ............................ 48 4.2.13.2 MRFP ................................................................................... ...................................................... ................................. .... 48 4.2.13.3 BGF ........................................................ ........................... ........................................................... .................................. .... 49 4.2.14 PGM - Presence, Group and Data Management ..................... 50 4.2.14.1 AP4.2.14.1 AP- Aggregation Proxy....................................................... .......................... ................................... ...... 51 4.2.15 MSP – MultiService Proxy ....................................................... .......................... ............................... 52 4.3 Interfaces and Protocols ......................................................... ............................ ............................... 55 4.3.1 Provisioning Interfaces ...................................................... ......................... .................................... ....... 55 4.3.1.1 PR-1 (LDAP) .................................................... ....................... ..................................................... ........................ 55 4.3.1.2 PR-2 (LDAP) .................................................... ....................... ..................................................... ........................ 55 4.3.1.3 PR-3 (CAI3G) ........................................................ .......................... ................................................. ................... 55 4.3.1.4 PR-5 (CLI) ............................................................ ............................... ................................................. .................... 55 4.3.1.5 PR-6 (CAI3G) ....................................................... .......................... ................................................. .................... 55 4.3.2 Self Administration interfaces ................................................... ............................. ...................... 55 4.3.2.1 Ut (XCAP) ...................................................... ......................... ....................................................... .......................... 55 4.3.3 DNS/ENUM interfaces ..................................... ........ ..................................................... ........................ 56 4.3.3.1 DN1 (DNS) .............................................................. ................................. .............................................. ................. 56 4.3.3.2 DN2 (DNS) .............................................................. ................................ ............................................... ................. 56 4.3.3.3 DN3 (ENUM) ................................................................ .................................. .......................................... ............ 56 4.3.3.4 DN4 (ENUM) ............................................................... .................................. .......................................... ............. 56 4.3.4 Charging interfaces .................................................................. ...................................................... ............ 57 4.3.4.1 Rf (Diameter) ......................................................... ............................ ................................................ ................... 57 4.3.4.2 Ro (Diameter)........................................................ ........................... ................................................ ................... 57 4.3.5 Signaling interfaces .......................................................... ............................. ..................................... ........ 57 4.3.5.1 CDS1 (Diameter) ........................................................ ........................... ........................................... .............. 57 4.3.5.2 CNS1 (SOAP or SIP) ............................................. .................. 57 4.3.5.3 CS NNI (SS7) ........................................................ .......................... ................................................. ................... 57 4.3.5.4 Cx (Diameter) ........................................................ .......................... ................................................. ................... 57 4.3.5.5 CAP (SS7)....................................................... .......................... ...................................................... ......................... 58 4.3.5.6 CCMP (HTTP) ...................................................... ......................... ................................................. .................... 58 4.3.5.7 Dh (Diameter) ...................................................... ......................... .................................................. ..................... 58 4.3.5.8 Dx (Diameter) ...................................................... ......................... .................................................. ..................... 58 4.3.5.9 Dz (Diameter) ...................................................... ......................... .................................................. ..................... 58 4.3.5.10 Dzx (Diameter) ......................................................... ............................ ............................................. ................ 58 4.3.5.11 e2 (Diameter) ................................................. .................... ....................................................... .......................... 58 4.3.5.12 Gi (RADIUS)....................................................... .......................... ................................................... ...................... 58 4.3.5.13 Gm (SIP) ........................................................... .............................. .................................................... ....................... 59 4.3.5.14 H.323 NNI ................................................................................ 59 4.3.5.15 Ia (H.248) ..................................................... ....................... .......................................................... ............................ 59 4.3.5.16 I2 (SIP) ........................................................ ........................... .......................................................... ............................. 59 4.3.5.17 Ic (SIP) ....................................................... .......................... ........................................................... .............................. 59 4.3.5.18 If-1 (MAP) ......................................................... ............................ ..................................................... ........................ 59 4.3.5.19 If-4 (H.248) ....................................................... .......................... ..................................................... ........................ 59 4.3.5.20 ISC (SIP) ..................................... ............................................. .............................. ............... 59 4.3.5.21 Ma (SIP) ...................................... ............................................. ............................. ................ 60 4.3.5.22 Ml (SIP or HTTP/SOAP/XML) .................................................. ....................... ........................... 60 4.3.5.23 Mg, Mi, Mj, Mk, Mm, Mx (SIP) .................................................. ............................ ...................... 60 4.3.5.24 Mn (H.248) .......................................................... ............................. .................................................. ..................... 60 4.3.5.25 Mp (H.248) .......................................................... ............................. .................................................. ..................... 61 4.3.5.26 Mr (SIP) ......................................................... ............................ ........................................................ ........................... 61 4.3.5.27 Mw (SIP) ........................................................ ........................... ....................................................... .......................... 61


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4.3.5.28 NP1 (SS7) ...................................... .......................................... ............................. ............. 61 4.3.5.29 Px (Parlay X APIs) ......................................... ........... ........................................................ .......................... 61 4.3.5.30 Rq (Diameter)......................................................... ............................ ............................................... .................. 61 4.3.5.31 Rx (Diameter) ......................................................... ............................ ............................................... .................. 61 4.3.5.32 S6a (Diameter) ....................................................... .......................... ............................................... .................. 61 4.3.5.33 SiH (Diameter) ........................................ ........... .......................................................... ................................. .... 62 4.3.5.34 Sh (Diameter) ........................................................ ........................... ................................................ ................... 62 4.3.5.35 Ud (LDAP and SOAP) ....................................................... .......................... .................................... ....... 62 4.3.5.36 XDM-15 (XCAP) .......................................................... ............................ ........................................... ............. 62 4.3.5.37 Zb (IP based protocols) .......................................................... ............................. ............................... .. 63 4.3.5.38 Zh (Diameter) ........................................................ ........................... ................................................ ................... 63 4.3.5.39 Zx (Diameter) .................................................... ...................... ..................................................... ....................... 63 4.3.6 Media Interfaces .......................................................... ............................ ........................................... ............. 63 4.3.6.1 CS NNI ............................................................ ............................... ...................................................... ......................... 63 4.3.6.2 If-9 (SIP) ........................................................... .............................. ..................................................... ........................ 63 4.3.6.3 If-10 (HTTP/vXML) ...................................................... ......................... .......................................... ............. 63 4.3.6.4 If-10.1 (MSCML)......................................................... ............................ ........................................... .............. 63 4.3.6.5 If-11 (HTTP) ................................................ ................... .......................................................... ............................. 64 4.3.6.6 If-12 (MRCPv1) ................................................ ................... ..................................................... ........................ 64 4.3.6.7 Mb (RTP/RTCP/MSRP) ............................... .. ......................................................... ............................ 64 4.3.7 Lawful Intercept I ntercept Interfaces In terfaces ....................................................... ............................ ........................... 64 4.3.7.1 X1, X2, X3 (LIC) ....................................................................... ................................................... .................... 64 4.3.8 Network Management Interfaces ............................................. ................................. ............ 64 4.3.8.1 M1 ............................................. ............................................... ............................. .................. 64 4.3.9 IPv6 support ............................................................. ................................ ............................................. ................ 65 5

Detailed Description .......................... ............................. ..................... 67

5.1 End-User Services ............................................... .................. ................................................. .................... 67 5.1.1 Basic services ..................................................... ....................... ................................................... ..................... 67 5.1.1.1 Basic MM (MultiMedia) communication ................................. ... ................................ .. 67 5.1.1.2 Instant Messaging ........................................................ ........................... ......................................... ............ 67 5.1.2 MMTel Services ................................................. .................... ................................................... ...................... 67 5.1.2.1 Basic MMTel communication ................................................... .................................... ............... 67 5.1.2.2 MMTel Supplementary Services .............................................. .................................... .......... 68 5.1.2.3 Self administration ........................................................ .......................... .......................................... ............ 74 5.1.3 Scheduled Conferencing Services ........................................... ............................ ............... 76 5.2 Network Functions ....................................... .......... ......................................................... ............................ 77 5.2.1 Basic Services....................................................... .......................... ................................................ ................... 77 5.2.1.1 Numbering, Identifiers Id entifiers and Addressing .................................... .......................... .......... 77 5.2.1.2 P-CSCF Discovery ........................................................ ........................... ........................................ ........... 79 5.2.1.3 Registration ........................................................................... .............................................. ................................ ... 81 5.2.1.4 Number Normalization .................................... ...... ....................................................... ......................... 82 5.2.1.5 Basic SIP request handling ha ndling ...................................................... ............................. ......................... 83 5.2.1.6 ENUM Resolution ........................................................ ........................... .......................................... ............. 83 5.2.1.7 DNS Resolution ........................................................... .............................. .......................................... ............. 84 5.2.1.8 Service Invocation ....................................................... .......................... .......................................... ............. 84 5.2.1.9 Media Policy Control ................................................................ ..................................... ........................... 85 5.2.1.10 Transit Routing ...................................................... ......................... ................................................ ................... 85 5.2.1.11 Access 5.2.1.11 Access Control ........................................................... ............................. ............................................ .............. 86 5.2.1.12 Connectivity Loss ....................................................... .......................... ........................................... .............. 87 5.2.1.13 Number Portability ........................................................... .............................. ...................................... ......... 88 5.2.1.14 Operator Controlled Co ntrolled Barring ..................................................... ......................................... ............ 88


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5.2.1.15 Lawful Intercept ........................................................................ 89 5.2.1.16 Data Retention ......................................................................... 89 5.2.1.17 Emergency Call ........................................................................ 90 5.2.1.18 Priority Call ............................................................................... 90 5.2.1.19 IMS Centralized Services ......................................................... 91 5.2.1.20 Single Radio Voice Call continuity. .......................................... 91 5.2.1.21 Network Inter-working ......................................... ..................... 91 5.2.1.22 Announcement ......................................................................... 93 5.2.1.23 IMS System Service Enablers .................................................. 93 5.2.1.24 Security ........................................ ............................................ 94 5.2.1.25 Operations and Maintenance ................................................... 95 5.2.1.26 Charging ................................................................................... 96 5.2.1.27 Provisioning .............................................................................. 98 5.2.1.28 Scalability and Expansion ........................................................ 99 5.2.1.29 Reliability ................................................................................ 101 5.2.1.30 Wholesale .............................................................................. 101 5.2.2 MMTel Services ..................................................................... 102 5.2.2.1 Subscriber data handling ....................................................... 102 5.2.2.2 Call Admission Control ................................................ ........... 102 5.2.2.3 Network Announcement ......................................................... 103 5.2.2.4 Dial Tone Management .......................................................... 103 5.2.2.5 Gateway model ...................................................................... 103 5.2.2.6 Real-time Transfer of Tariff Information ................................. 103 5.2.2.7 Subscriber Credit Notification ................................................. 104 5.2.2.8 Video Fallback........................................................................ 104 6

References.......................................................................................... 104


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Revision Information Rev A

Date 08/05/2009

Sign. Comment ETXJOWA Introduced for the first version of IMS MNLSV, HSC 113 06 R1A

B

21/12/2009

EANTLUM

C D E F

29/05/2009 2010-11-12 2011-02-15 2011-02-15

F1

2011-02-15

G H J K L

2011-06-13 2011-08-19 2012-02-15 2012-05-10 2012-11-29

Updated for MNLSV, HSC 113 06 Q4 R3A ECEJMFG Updated for IMS MNSLV R10B ERALONN Updated for IMS MNLSV 11A EPILKRI Updated for IMS System 11B EPILKRI Updated for IMS System 11B, fixed the tracked changes XSITIAL Updated to manually store a PDF with no corrupted figures. ECEBMG ERAHLIN ERALONN ERALONN ERALONN

Updated for IMS System 12A Netconf removed for TSP. Updated for IMS System 12B Updated for IMS System 13A Additional updades for 13A, such as: 19543 MRS-MRF support if Mr 20840 IPv6 for MRS-MRFP Updated service structure MRS figure corrected Call Return added as a supplementary MMTel service. Hotline added as a supplementary MMTel service. • • • • •

•

2

Introduction The document describes the Ericsson IMS System. IMS provides end-users with advanced multimedia services including basic telecom services and conference calling. The SIP protocol together with Diameter and H.248 are used for control signaling. Support is provided for, but not limited to, RTP and MSRP for media transportation. IMS System includes a collection of IMS functions, which are built up by a number of logical nodes. IMS System is a design product, not a solution product, and can not be ordered. IMS System can be seen as a box of building blocks, from which a sub-set can form the platform for an IMS solution.


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The IMS System architecture is based on the 3GPP architecture (reference [2]).

2.1

Purpose The purpose of this document is to: •

•

•

2.2

Provide a fundamental understanding of functions enabled by IMS System. Provide an architectural overview and describe the system boundary, internal architecture and interfaces. Be a guide into more detailed documentation.

Scope In most cases when the term Home Subscriber Server (HSS) is used, the product HSS is meant. The HSS product can be used in either the HSS classic mode or the HSS Front End mode as described in chapter 4.2.2.

2.3

General Reading Instruction Within the IMS System, not all IMS System documents are updated to describe the HSS Data Layered Architecture (DLA). One must therefore understand that when reading such document, the used term “HSS” shall be interpreted as the HSS with the classic mode if nothing else is stated. Some IMS System documents might have left out SLF for drawing simplification. When reading such drawing, remember that to achieve scalability a SLF is needed when more than one HSS (classic or Front End) is deployed in the network. From a client perspective, the SLF is running in proxy mode when the HSS Front End is used. Otherwise there is no difference between a HSS in classic mode and a HSS in Front End mode. The same interfaces exist. Example; For MMTel Session Handling, it is described a three party conference creation where the Conference AS verifies that UE-A is authorized to initiate conferences by interrogating the MMTel Users service subscription data in HSS using the Sh interface. This description is correct for the classic HSS. For the Front End HSS, the same Sh request is used by the Conference AS, but it is now sent to an HSS Front End. The HSS Front End will fetch the user data from an external database, the User Data Repository (UDR), before sending the response back to the Conference AS. A reader of the IMS System documentation must be aware of the fact that when HSS is used, an SLF together with an HSS Front End can be used instead (for example in traffic flow).


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Glossary

3.1

Terminology

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For better understanding of the document following terms must be considered:

Term

Description

Function

The performance of a specific discreet action disregarding the quantity and quality of the operation.

Logical Functional Entity

It performs a specific set of functions pertaining to a logical node.

Logical Node

A Logical node consists of one or more related logical functional entities. A logical Node can be realized physically on one (or more) Network Elements.

Reference Point

A conceptual point at the conjunction of two nonoverlapping functional groups/logical nodes. It comprises one or more interfaces that describe the interactions and behavior that take place between the entities. A reference point is needed when the conforming entities can evolve independently of each other.

Interface

An Interface describes the interaction point/common Boundary between two/more Logical Nodes/logical functional entities from a particular view (for example, signaling/charging interface). It describes the semantics and behavior of the interaction. An interface has a binding to a protocol and/or Protocol stack.

Protocol

A Set of rules that allow different machines or pieces of software to coordinate with each other without ambiguity. A protocol often implies a common message format and an accepted set of primitives or commands that all parties involve understand and that transactions among them follow predictable logical sequences.

Further definitions and acronyms are found in [1].


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Acronyms and Abbreviations

Acronym

Description

3GPP

3rd Generation Partnership Project

AGCF

Access Gateway Control Function

AIN

Advanced Intelligent Network

AKA

Authentication and Key Agreement

ALG

Application Level Gateway

AoC

Advice of Charge

AP

Aggregation Proxy

AS

Application Server

A-RACF

Access Resource and Admission Control Function

AU

Application Usage

AUID

Application Unique Identity

BB

BroadBand

BCS

Business Communication Suite

BGCF

Breakout Gateway Control Function

BGF

Border Gateway Function

BSF

Bootstrapping Server Function

CAC

Call Admission Control, or Connection Admission Control

CAS

Customer Administration System

CC

Content of Communication (Call Content)

CCBS

Communication Completion on Busy Subscriber

CDF

Charging Data Function

CDS

Communication Details Server


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Acronym

Description

CDTF

Communication Details Transfer Function

CLF

Connectivity session Location and repository Function

CLI

Command Line Interface

CNP

Cross Network Proxy

CNS

Calling Name Server

CO

Conference Owner

CP

Conference Participant

CS

Circuit Switched

CSI

Circuit Switched Integration

CSCF

Call/Session Control Function

CUDB

Centralized User Database

DBL

Dynamic Black List

DHCP

Dynamic Host Configuration Protocol

DLA

Data Layered Architecture

DNS

Domain Name System

DTMF

Dual-Tone Multi-Frequency

ECIM

Ericsson Common Information Model

EMA

Ericsson Multi Activation

ENUM

E.164 Number resolution

EPS

Evolved Packet System

ERH

External Resolution Handling

eUTRAN

evolved Universal Terrestrial Radio Access Network

FQDN

Fully Qualified Domain Name

FTP

File Transfer Protocol


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Reference

Acronym

Description

FW

FireWall

GAA

Generic Authentication Architecture

GBA

Generic Bootstrapping Architecture

GETS

Government Emergency Telecommunications Service

GGSN

Gateway GPRS Support Node

GIBA

GPRS IMS Bundled Authentication

GMLC

Gateway Mobile Location Centre

GPRS

General Packet Radio Service

GUI

Graphical User Interface

HLR

Home Location Register

HSS

Home Subscriber Server

HTTP

HyperText Transfer Protocol

IAP

Intercept Access Point

IBCF

Interconnect Border Control Function

ICS

IMS Centralized Services

IN

Intelligent Network

INAP

Intelligent Network Application Part

IMPI

IMS Private User Identity

IMPU

IMS Public User identity

IMS

IP Multimedia Subsystem

IP

Internet Protocol

IRI

Intercept Related Information

IRS

Implicit Registration Set

ISC

IP multimedia Service Control


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Reference

Acronym

Description

ISDN

Integrated Services Digital Network

ISIM

IMS Subscriber Identity Module

ISM

IMS Subscription Manager

ISUP

Integrated Services User Part

ITU

International Telecommunications Union

LDAP

Lightweight Directory Access Protocol

LI

Lawful Intercept

LIC

Lawful Intercept Communication Protocol

LRF

Location Retrieval Function

LTE

Long Term Evolution

MAP

Mobile Application Part

MCID

Malicious Call Identification

MCR

Malicious Communication Rejection

MGC

Media Gateway Controller

MGCF

Media Gateway Control Function

MGW

Media Gateway

MLP

Mobile Location Protocol

MME

Mobility Management Entity

MMTel

Multimedia Telephony

MP

Media Proxy

MRFC

Media Resource Function Controller

MRFP

Media Resource Function Processor

MRS

Media Resource System

MSISDN

Mobile Subscriber ISDN Number or Mobile Station International ISDN Number


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Acronym

Description

MSP

MultiService Proxy

MSRP

Message Session Relay Protocol

MTAS

Multimedia Telephony Application Server

NAF

Network Application Function

NAI

Network Access Identifier

NAPT

Network Address & Port Translation

NAPTR

Naming Authority Pointer

NASS

Network Attachment Subsystem

NAT

Network Address Translation

NBA

NASS Bundled Authentication

NDUB

Network Determined User Busy

NGN

Next Generation Network

NNI

Network-Network Interface

NP

Number Portability

OCS

Online Charging System

OMA

Open Mobile Alliance

OTP

Operating Telephony Provider

PANI

P-Access-Network-Info

PBX

Private Branch eXchange

PCC

Policy Charging Control

PCFA

P-Charging-Function-Addresses

PCRF

Policy and Charging Rules Function

PCV

P-Charging-Vector

PDN-GW

Packet Data Network Gateway

PDP

Packet Data Protocol


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Acronym

Description

PLMN

Public Land Mobile Network

PNA

Presence Network Agent

PNI

Private Network Interface

PRS

Presence Simple

PS

Packet Switched

PSAP

Public Safety Access Point

PSI

Public Service Identifier

PSTN

Public Switched Telephone Network

QoS

Quality of Service

RACF

Resource and Admission Control Function

RACS

Resource Access Control Server

RCS

Rich Communication Suite

RDF

Routing Determining Function

RPH

Resource Priority Header

RTCP

RTP Control Protocol

RTP

Real-Time Transport Protocol

RTSP

Real-Time Streaming Protocol

RTTI

Real-time Transfer of Tariff Information

SBC

Session Border Controller

SBG

Session Border Gateway

SCC AS

Service Centralization and Continuity Application Server

SCP

Service Control Point

SCTP

Stream Control Session Protocol

SDA

Subscriber Data Access


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Acronym

Description

SDP

Session Description Protocol

SE

SmartEdge

SGC

Session Gateway Controller

SGW

Signaling Gateway

SIM

Subscriber Identity Module

SIP

Session Initiation Protocol

SLF

Subscription Locator Function

SM

Session Manager

SNM

Sub Network Manager

SNMP

Simple Network Management Protocol

SOAP

Simple Object Access Protocol

SPDF

Service Policy Decision Function

SS

Storage Server

SS7

Signaling System number 7

SRVCC

Single Radio Voice Call Continuity

SSH

Secure SHell

SSO

Single Sign On

TDM

Time Division Multiplex

TLS

Transport Layer Security

TSP

Telephony Services Platform

UDC

User Data Consolidation

UDP

User Datagram Protocol

UDR

User Data Repository

UE

User Equipment

UNI

User-Network Interface


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Reference

Acronym

Description

URI

Uniform Resource Locator

USIM

Universal Subscriber Identity Module

UTRAN

Universal Terrestrial Radio Access Network

VTP

Virtual Telephony Provider

vXML

Voice XML

WPS

Wireless Priority Service

WUIGM

Web User Interface for Group and Data Management

XCAP

XML Configuration Access Protocol

XDMC

XML Document Management Client

XDMS

XML Document Management Server

XML

eXtensible Markup Language

System Function Outline This chapter describes the architecture of IMS System, the logical nodes it contains, and external and internal interfaces.

4.1

Allocation The following two figures represent the IMS System reference Network Architecture and its external actors.

Ericsson IMS System Description

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