Proposal for registration of A-MG via AGCF

Reporter ： Yan Hong

Date：2023年4月21日 星期五

Version： V1.0

Table of Contents

Introduction about AGCF Registration process

Introduction about AGCF

Oth

er IP N

etw

orks

IP Transport (Access and Core)

T-MGF

I-BGF

UPSF

BGCF

ChargingFunctions

IWF

IMS-based PES

Mw

Mx

Mr

MgMj

Mi

Mp Mn

Gm

Gq'

ISC/Ma

Cx Dx

DhSh

Ic

Rf/Ro

Rf/Ro

Ib

Iw

Gq'

PS

TN

/ISD

N

SGFMRFC MGCF

MRFP

Resource and Admission Control Subsystem

Ie

Mw IBCFMx

Mk

Other types of service logic

PSTN/ISDN Emulation logic

Application ServersRf/Ro

MG

ZZ

ZZ

AGCF

Gq'

P1Mw

P3

Ut

Ut

Network Attachment Subsystem

e2e2

MxP-CSCF

VGW

Ut

I/S-CSCF

SLF

TISPAN PSTN/ISDN Emulation Subsystem - Functional Architecture

Introduction about AGCF

AGCF is specific to the PSTN/ISDN emulation subsystem. It’s the first point of contact for residential and access media gateways.

AGCF is acting as an MGC for controlling media gateways functions (R-MGF and A-MGF) located in residential and access gateways .

Purpose of the proposal

AGCF performs signalling interworking between SIP and analog signal via the P1 reference point. When the protocol running on P1 reference point is H.248 ， the protocol doesn’t define registration for user. The document is trying to provide a practical method for registration of A-MG.

The following will represent a method “domain registration”

Registration process

AGCF

S-CSCF

UPSF

A-MG

P1Mw

PES APP

ISCCx

P1 ： H.248

Mw: ： SIP

Registration process

Domain registration:1) A-MGAGCF: When A-MG start/restart, A-MG

sends ServiceChange to AGCF;2) AGCFS-CSCF: AGCF sends SIP-register to

S-CSCF with IP address of A-MG. All the subscribers in A-MG are registered by this operation.

3) S-CSCFUPSF:S-CSCF register the domain of A-MG to UPSF. UPSF will record the related S-CSCF of the A-MG domain.

Registration process

When storing a new subscriber in HSS, get the related S-CSCF same as the domain’s.