ISC Reference Architecture – Functional Planesv1.0, Jan 2002
Application/Feature Servers (SCP, Service Logic), Media Server
Service/Application Plane
Call Agents, MGC, Softswitch
Control & Signaling Plane
InterworkingDomain:TG (MG), SG, Interworking GW
Transport Plane
Non-IP Access Domain:Wireline Access (AG, Access Proxies)Mobile Access (RAN AG)Broadband Access (IADs, MTAs)
Subscriber & Service Provisioning, Network Management, Operational Support,Billing Support
Management Plane
Open APIs (Parlay, Jain, CAMEL, SIP, AIN/INAP)
IN/AIN
Signaling (ISUP, MAP, RANAP, MGCP, MEGACO, SIP)
Inter-Network Switch
PSTN/SS7/ATM Networks
Non-IP Terminals/Mobile Networks
SS7; TDM/ATM
SIP/SIP-T; H.323
IP Transport Domain:IP Backbone, Routers, Switches, BGsQoS Mechanisms (RSVP, Diffserv, MPLS …) IP
IP Phones (H.323, SIP, MGCP, …), IP Terminals, IP PBXs
Other VoIPNetworks
ISC Reference Architecture – Functional Entitiesv1.0, Jan 2002
ISC Functional Definitions:AS-F: Application Server Function; SC-F: Service Control Function; CA-F: Call Agent Function;
MGC-F: Media Gateway Controller Function; SPS-F: SIP Proxy Server Function; R-F: (Call) Routing Function;
A-F: Accounting Function (e.g., AAA); MS-F: Media Server Function; SG-F: Signaling Gateway Function;
MG-F: Media Gateway Function; IW-F: Interworking Function; AGS-F: Access Gateway Signaling Function;
AG: Access Gateway; TG: Trunking Gateway
Service & Application
Other IP Network
(SIP, H.323)
Access Network(Wireline/Wireless)
PSTN/INIPSG-F
TG (MG-F)IW-F
(MGC-F)
AGS-FIP Phone (MG-F)(SIP, H.323, …)
MS-F
CA-F/MGC-FSPS-F/R-F/A-FCall Control & Signaling
Transport
Media Signaling
SS7
TDM
AS-F/SC-F
NOTE: Management Function Not Shown for Simplicity
MG-FAG
ISC Reference Architecture – MGC Building Blocksv1.0, Jan 2002
Open Service Access Gateway (a.k.a. 3rd Party Application Gateway)
Application Server
OEM AgentOSS Agent
Access Session Manager & Mobility
(R-F/A-F)
AAA
ENUM
HSS
Interworking/Border Connection Manager
(IWF/Inter-Operator Proxy))
Call Control & Signaling
(CA-F)
Connection Session Manager
(QoS/MGC-F)
TG/MG/AG (MG-F), MS (MS-F)
SG (SG-F),AG (AGS-F)
Proxies
( WAP, CLI…)
Terminal agents, Network agents
ISC Reference Architecture – Physical Examplev1.0, Jan 2002
Access Network(Wireline/Wireless)
SIP or H.323 Network
IN SCP
ExternalSoftSwitch
SS7/BICC Network
ENUM/TRIP
OSS Back Office
NMSSNMP
ENUM/TRIP
MGC/CA
SPS-FCA-F
MGC-F
AS-F
ASe.g., Voicemail Application Server
SIP MS
MS-Fe.g., Media server for digit collection & announcement
SIP/MGCP
SG
SG-F
Sigtran (ISUP, INAP)
SS7/BICC
SIP or H.323
TGMG-F
TDM
PSTN
MGCP/Megaco
SIP/SIP-T
IP Phone
SIP/MGCP/ Megacop
AGAGS-F
Sigtran
RTP/RTCP
IMPORTANT NOTE: the dashed lines represent the realization of information flows achieved by selecting specific protocol and interfaces to meet service requirements; this figure and its associated protocol choices is informative only.
OSS
IW-F
(MAP, IS41)
(IUA, V5UA)
MGCP/Megaco
MG-F
RTP/RTCP
R-F
SIP/MGCP
AccessProxy
RTP/RTCP
A-F
Access Gateway
SIP/SIP-T, H.323, Q.BICC
RTP/
RTCP
Media
Media Gateway Controller/Call Agent
Access Network
Signaling
Media Gateway Controller/Call AgentSignaling
WirelineWireline
WirelessWirelessTrunk Media
Gateway
Media Gateway Control
MGCP
Megaco
Media Gateway Control
MGCP Megaco
PSTN/IN
SS7/BICCSS7/BICC
PSTN/IN SignalingSS7/BICC
ISUP
INAP
TDM/ATMTDM/ATM
IN SCPIN SCP
Sigtran
(M3UA, IUA, V5UA)
IP Phone or Terminal
(H.323, SIP, MGCP, Megaco)
H.323, SIP, MGCP, Megaco
Application Server
Third Party Service
Open APIs
Media
RTP/RTCP
Media Server MGCP, H.248, SIP
MGCP, H.248,
SIP
System Example – Wireline network
Signaling Gateway
Sigtran(M3UA/ SCTP)
IP Network
Examples – POTS Carried over IPv1.0, Jan 2002
Access Gateway
Analog Line
Media Gateway Controller
MGCP/Megaco
Trunking GatewayRTP
PSTN
NOTE: The Access Gateway here is also commonly called:
a. Media Gateway (MG), or
b. Residential Gateway (RG)
IP Network
Signaling Gateway
Examples – Access Network (V5, ISDN) over IPv1.0, Jan 2002
Access Gateway
Analog Line or ISDN BRI/PRI
MGCMGCP/Megaco
Trunking Gateway
RTP
Signaling Gateway
PSTNAN
Media + V5 (V5.2) or ISDN (Q.921) Signaling
Sigtran Signaling:V5UA or IUA
Access Gateway (AG) includes both MG-F and AGS-F
AN: Access Network
BRI: Basic Rate Interface; PRI: Primary Rate Interface
IP Network
Examples – Cable Network (PacketCableTM)v1.0, Jan 2002
DOCSIS Network
IP over HFC
Analog Line
Cable Modem
CMTS
IP Network
CA/MGC
Ethernet
Trunking Gateway
Signaling Gateway
PSTN
NCS or SIP
RTP
NOTE: The Access Gateway here is called:
a. Multimedia Terminal Adaptor (MTA), or
b. Residential Gateway (RG)
AG: MTA
DOCSIS: Data over Cable System Interface Specification
CMTS: Cable Modem Termination System
NCS: Network Control Signaling (modified MGCP for PacketCable)
Examples – VoDSL and IAD over IPv1.0, Jan 2002
DSL Network
IP over ATM
Analog Line
AG: IAD
DSLAM
Packet Network (IP or ATM)
MGC
Ethernet
Trunking Gateway
PSTN
MGCP or Megaco
RTPATU-R
NOTE: The Access Gateway here is called:
Integrated Access Device (IAD)
DSLAM: Digital Subscriber Line Access Multiplexer
ATU-R: Asymmetric Digital Subscriber Line (ADSL) Terminal Unit – Remote
Examples – Wireless (3GPP R99 special case a la NGN)
v1.0, Jan 2002
AG: Media Gateway
E1/T1/ATM: Signaling + Media
MSC Server
Megaco
Media GatewayRTP
PSTN/PLMNRAN
GMSC ServerSigtran Signaling:BSSAP or RANAP over M3UA/SCTP
NOTE: The Access Gateway here is referred to as:
Media Gateway (MG)
RAN: Radio Access Network (GSM or 3G)
MSC: Mobile Switching Center; GMSC: Gateway MSC
Note: MSC Server or GMSC Server is equivalent to MGC
HSS Application Server
PSE
Signaling Gateway
IP Network
Examples – Wireless (3GPP R2000 All IP General Case)
v1.0, Jan 2002
IP:Signaling + Media
MMCS/MMAS
SIP, Megaco
Media GatewayRTP
PSTN/PLMNnon IPRAN
Sigtran Signaling:BSSAP or RANAP
NOTE: The Access Gateway here is referred to as:
Media Gateway (MG) and can be in the terminal (SIP mobiles) or at the Radio Node Controllers
RAN: Radio Access Network (3G)
MMCS: MultiMedia Call Server
MMAS: MultiMedia Application Server
HSS3rd Party Application Server
PSE
MGC
SGSN/GGSN
SIP
Non SIPIP Network
Media & Signaling Gateways
SIP/SIP-T, H.323
Q.BICC
RTP/RTCP
Media
MSC Server
RAN
Signaling
GMSC Server
Signaling Conversion
Sigtran
(M3UA/SCTP)
SS7SS7
BSSAP
RANAP
TDMTDMMedia
Gateway
Media Gateway Control Megaco
Media Gateway Control
Megaco
Signaling Gateway
PSTN/PLMN
Signaling Conversion
Sigtran
(M3UA/SCTP)
SS7/BICCSS7/BICC
PSTN Signaling
SS7/BICC
ISUP
CAP
TDM/ATMTDM/ATM
ATMATM
ATMATM
VLR
Signaling
HLR
MAP Signaling
Sigtran (M3UA/SCTP)
MAP Signaling
Sigtran (M3UA/SCTP)
Application Server
Third Party Service
Open APIsOSA
Open APIs
OSA
Application Server
Third Party Service
Open APIs
OSA
System Example – WCDMA mobile network
IP Network
AcronymsAAA – Authentication, authorization, and accounting (IETF)BSSAP – Base station subsystem application part (GSM, 3GPP)BICC – Bearer independent call control (ITU)CAP – CAMEL application part (GSM, 3GPP)CMTS – Cable modem termination system (DOCSIS, PacketCableTM)ENUM – E.164 number (IETF)HSS – Home subscriber system (3GPP)IAD – Integrated access device (DSL)MAP – Mobile application part (GSM, 3GPP)MEGACO – Media gateway control (IETF/ITU)MGCP – Media gateway control protocol (IETF)MMCS/MMAS – Mobile multimedia call server/Mobile multimedia application server (3GPP)MSC/GMSC – Mobile service center/Gateway MSC (GSM, 3GPP)MTA – Multimedia terminal adaptor (PacketCableTM)NCS – Network call signaling (PacketCableTM)PLMN – Public land mobile network (3GPP, UMTS)PSE – Personal service environment (3GPP)OSA – Open service access (3GPP)RANAP – Radio access network application part (3GPP)SGSN/GGSN – Serving GPRS system node/Gateway GPRS system node (GPRS, 3GPP)SIGTRAN – Signaling transport application network? (IETF)TRIP – Telephony routing interworking protocol (IETF)VLR/HLR – Visitor location register/Home location register (GSM, 3GPP)