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NGN Architecture andFramework
Jeong Yun KIM
ETRI
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Contents
Introduction
NGN Components
NGN Architecture
Transport Stratum
Service Stratum PSTN/ISDN Emulation Service Component
Call Server-based
IMS-based
Next Step
Appendix : ETRIs BcN Products
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Introduction
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NGN
NGNCAPEX/OPEX efficiency
Fast service creation/delivery
Multi-terminal support
Enabling integrated/blended service
Current Network
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Definition of NGN
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Support for Multiple Access Technologies
Distributed control distributed processing nature of IP networks
location transparency for distributed computing
Open control support service creation, service updating, and incorporation of
service logic provision by third parties
Independent service provisioning Separation network operation from distributed, open control
mechanismpromote a competitive environment for NGN development in order
to speed up the provision of diversified value-added services
General principles of NGN
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Support for the services in a converged network This is needed to generate flexible, easy-to-use multimedia services,
by tapping the technical potential of the converged, fixed-mobile
functional architecture of the NGN.
Enhanced security and protection
This is the basic principle of an open architecture. It is imperative toprotect the network infrastructure by providing mechanisms for
security and survivability in the relevant layers
Functional entity characteristics Functional entities may not be distributed over multiple physical
units but may have multiple instances
General principles of NGN
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NGN functions are divided into service stratum functions and
transport stratum functions
Transport stratum
Service stratum
Control
Media
ManagementFunctions
Management
ANI
Transport Control Functions
Resource andAdmission
Control Functions
Network AttachmentControl Functions
Network AttachmentControl Functions
NNIUNI
Application Support Functions & Service Support Functions
Applications
Transport Functions
End-User
FunctionsOther
Networks
Service Control
Functions
Service User
Profiles
Service User
Profiles
Transport UserProfiles
Transport UserProfiles
NGN Architecture Overview
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NGN Components
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Legacy
Terminals
Note: Gateway (GW) may exist in either Transport Stratum
or End-User Functions.*
Legacy
Terminals
Transport Stratum
Service Stratum
End-User
Functions
Application Functions
Core transport
FunctionsNGN
Terminals
Customer
Networks
O
therNetworks
Application Support Functions and Service Support Functions
Core TransportFunctions
O
therNetworks
Edge
Functions
Access Transport
Functions
Access Transport
Functions
Service
Control
Functions
Network Access
Attachment Functions
Network Attachment
Control Functions
(NACF)
Access Network
Functions
Resource and Admission
Control Functions
(RACF)
User
Profile
Functions
T. User
Profile
Functions
User
Profile
Functions
T. User
Profile
Functions
GWGWGWGW
Other NGN Service
Components
PSTN / ISDN Emulation
Service Component
IP Multimedia Component&PSTN/ISDN Simulation
IP Multimedia
Service Component
S. User
Profile
Functions
GWGWGWGW
Applications
NGN Components
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IP Multimedia Service component
It supports mediated multimedia services
voice or video telephony or PSTN/ISDN simulation,
subscribe/notify for presence information and the message method for
message exchange
PSTN/ISDN Emulation Service component It refers to the provision ofPSTN/ISDN service capabilities and
interfaces using adaptation to an IP infrastructure.
It enables the support of legacy terminals connected through a
gateway to an IP network.
All PSTN/ISDN services remain available and identical, such that endusers are unaware that they are not connected to a TDM-based
PSTN/ISDN.
NGN service-specific components
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Other NGN service components
The definition of other NGN service-specific components is for
further study.
Service specific components may be required in order for the NGN
to support services such as content delivery services, multimedia
multicast or broadcast services , push services, data retrieval
applications, data communication services, online applications,sensor network services, remote control services, and over-the-
network device management
NGN service-specific components
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Network Attachment Control Function component
Network-level Authentication, Authorization and IP addressallocation for a user/terminal
Resource Admission Control Function component
QoS management according to the service request from a user
NGN transport-specific components
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NGN Architecture
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The transport functionsprovide the connectivity for all
components and physically separated functions within theNGN
Access Network functions
End-users access to the network
collecting and aggregating the traffic coming from these accessestowards the core network
perform QoS control mechanisms dealing directly with user traffic
Edge functions
used for media and traffic processing when aggregated traffic
coming from different access networks is merged into the coretransport network
Transport Functions
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Core transport functions
ensuring information transport throughout the core network
Gateway functions
interwork with end user functions and other networks including
other NGNs and many existing networks
Media handling functions
media resource processing for the services provision, such as
generation of tone signals and trans-coding
Transport Functions
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Resource and admission control functions (RACF)
provide QoS control (including resource reservation, admissioncontrol and gate control),NAPT and/or FW traversal control
Functions over access and core transport networks.
Admission control involves checking authorisation based on user
profiles, SLAs, operator specific policy rules, service priority, and
resource availability within access and core transport act as the arbitrator for resource negotiation and allocationbetween
Service Control Functions and Transport Functions
interacts with Service Control Functions and Transport Functions for
Session-based applications (e.g. SIP call or video streaming)
interact with Network Attachment Control Functions (NACF,including network access registration, authentication and
authorization, parameters configuration) for checking user profiles
and SLAs held by them
Transport Control Functions
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Network Attachment Control functions (NACF)
provide registration at access level and initialization of End-userfunctions for accessing to the NGN services
provide network level identification/authentication, manage the IP
address space of the Access Network and authenticate access sessions
announce the contact point of the NGN Service/Applications
functions to the end user Functionalities
Dynamic provisioning of IP addresses and other user equipment configuration
parameters.
By endorsement of user, auto-discovery of user equipment capabilities and other
parameters.
Authentication of end user and network at the IP layer (and possibly other layers). Authorization of network access, based on user profiles.
Access network configuration, based on user profiles.
Location management at the IP layer
Transport Control Functions
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Service Control Functions
include resource control, registration, and authentication andauthorization functions at the service level for both mediated and non-
mediated services
include functions for controlling media resources, i.e., specialized
resources and gateways at the service-signaling level
accommodate service user profile
Application Support Functions and Service Support
Functions (ASF&SSF)
include functions such as the gateway, registration, authentication and
authorization functions at the application level
work in conjunction with the Service control functions toprovide
end-users and applications with the value added services they request
Functions of Service Stratum
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End User Functions
No assumptions are made about the diverse end-user interfaces andend-user networks that may be connected to the NGN accessnetwork. End-user equipment may be either mobile or fixed
Management Functions
manage the NGN in order to provide NGN services with theexpected quality, security, and reliability
are allocated in a distributed manner to each functional entity (FE)
interact with network element (NE) management, networkmanagement, and service management FEs
Fault management
Configuration management
Accounting management: include charging and billing functions Performance management
Security management
The others
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Three distinct domains Applications
Application Support functions and Service Support functions in the
service stratum of the NGN
certain NGN resources and capabilities, including those in the transport
stratum, capabilities such as presence, location information, charging
function, security schemes
Applications domain those trusted by network/server providers: network/server providers
themselves and subordinate organizations or partners
those that are not: independent service providers
Application Network Interface (ANI) the functional area of ASF&SSF offers service-enabling resources to the
Applications area, independently of the underlying network technologies
NGN Service Architecture
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T-6: InterconnectionBorder Gateway FE
T-8:Media
Resource Processing FE
T-1: Access Media
Gateway FE Core Transport Functions
TC-T1
T-U1
T-9:Signalling
Gateway FE
S-T2
T-U2
T-U3
S-T3S-T1 S-T5 S-T4
T-ON1
T-ON2
T-ON3
T-2:Access Node FET-3: Edge Node
FE Access Transport Functions
TC-T2 TC-T5
Core Transport Processing
T-4:Access Relay
FE
T-5:Access Border
Gateway FE
T-7:Trunking Media
Gateway FE
TC-T9TC-T6
Access Transport Processing
TC-T4TC-T3 A-T1
FEs of Transport Functions
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Access Media Gateway Functional Entity (AMG-FE)
provides interworking between the packet-based transport used inthe NGN and analogue lines or ISDN access
provides bi-directional media processing functions for user plane
traffic between PSTN/ISDN and the NGN under the control of the
AGC-FE
provides adequate transfer functions for PSTN/ISDN user callcontrol signalling to the AGC-FE for processing.
optionally supports payload processing functions (e.g., codecs and
echo cancellers).
provides the TDM/IP interworking function (refer to Y.TDMIP ) to
support ISDN emulation service in case ISDN unrestricted bearer isneeded.
FEs of Transport Functions
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Access Node Functional Entity (AN-FE)
directly connects to End user functions and terminates thefirst/last mile link signals at the network side.
Generally, it is a Layer 2 device that may be IP capable
may perform packet filtering, traffic classification, marking,
policing and shaping at flow level or user level under the control of
the RACF
should support the functions of Policy Enforcement Functional
Entity (PE-FE) and controlled by the RACF
FEs of Transport Functions
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Access Relay Functional Entity (AR-FE)
a relay between End-User functions and the NAC-FE that inserts localpre-configuration information when necessary
For example when using DHCP, the AR-FE acts as a DHCP Relay Agent
Access Border Gateway Functional Entity (ABG-FE)
A packet gateway between an access network and a core network used
to mask a service providers network from access networks, through
which End-user functions accessing packet-based services
may include opening and closing gate, packet filtering based firewall,
traffic classification and marking, traffic policing and shaping, network
address and port translation, media relay (i.e. media latching) for NAT
traversal, and collecting and reporting resource usage information
support the functions of PE-FE controlled by the RACF
FEs of Transport Functions
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Interconnection Border Gateway (IBG)-FE
a packet gateway used to interconnect an operators corenetwork with another operators core networksupporting the
packet-based services
shall support the functions of PE-FE (except for remote NAPT
Traversal) controlled by the RACF
Media conversion (e.g., G.711 and AMR, T.38 and G.711) Inter-domain IPv4/IPv6 conversion
Media encryption
Fax/modem processing
FEs of Transport Functions
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Trunking Media Gateway (TMG)-FE
provides interworking between the packet-based transport used inthe NGN and trunk lines from the circuit-switched network.
It is under the control of the MGC-FE.
may support payload processing (e.g., codecs, echo cancellers, and
conference bridges)
optionally provides the TDM/IP interworking function (refer toY.1453 ) in order to support ISDN emulation service in case ISDN
unrestricted bearer is needed
Signalling Gateway (SG)-FE
is responsible for signaling transport interworking between theNGN and existing networks such as PSTN, ISDN, IN networks, and
Signaling System No.7
FEs of Transport Functions
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Media Resource Processing (MRP)-FE
provides payload processing of packets used in the NGN allocates specialized resources (such as announcement server,
notification tone, and voice recognition resources, and voice menu
and conference resources).
provides media mixing functions under the control of the MRC-
FE. receives and generates DTMF signals.
generates tone signals (e.g., ring back).
generates announcements.
provides trans-coding, text-to-speech, video mixing, conference
bridge, data conference, fax, voice and video recording, and voicerecognition capabilities.
FEs of Transport Functions
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NACF
T-12: T. User
Profile FE
T-14:
Access Management FE
T-11: T. Authentication
& Authorization FE
T-13: T. Location
Management FE
RACF
TC-T6 (Note 4)
T-16: Policy Decision FETC-TC1
TC-T1
S-TC1 S-TC2 S-TC3 S-TC4
TC-T2 (Note 3)
TC-T9 (Note 4)
TC-T5 (Note 3)
T-17: TransportResource Control FE
S-TC5
TC-T3 (Note 1)
TC-T4 (Note 2)
TC-ON1
TC-U1
T-10: Network
Access Configuration FE
T-15: Home GateWay
Configuration FE
TC-Ux
Note 1: applicable when TRC-FE operates in the access network domain
Note 2: applicable when TRC-FE operates in the core network domain
Note 3: applicable when PD-FE operates in the access network domain
Note 4: applicable when PD-FE operates in the core network domain
FEs of Transport Control Functions
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Network Access Configuration (NAC)-FE
IP address allocation to terminalsmay also distribute other network configuration parameters, such as
the addresses of DNS servers and signalling proxies (e.g., the
address of the P-CSC-FE in order to have access to service stratum
functions)
should be able to provide an access network identifier to aterminal This information uniquely identifies the access network to
which the terminal is attached
discovery function to support auto configuration
Transport Authentication and Authorization (TAA)-FE
provides authentication and authorization functions in the transportstratum, based on user profiles (TUP-FE), for network access
FEs of Transport Control Functions
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Access Management (AM)-FE
translates network access requests issued by the User Equipments.It forwards the requests for allocation of an IP address and possibly
additional network configuration parameters to/from the NAC-FE
forwards requests to the TAA-FE to authenticate the user,
authorize or deny the network access, and retrieve user-specific
access configuration parameters
Home GateWay Configuration (HGWC)-FE
is used during initialization and update of the HGW
provides to the HGW with additional configuration information (e.g.
configuration of a firewall internally in the HGW, QoS marking ofIP packets etc.)
FEs of Transport Control Functions
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Policy Decision (PD)-FE
provides a single contact point to the SCF and hides the details oftransport network to the SCF
makes the final decision regarding network resource and
admission controlbased on network policy rules, SLAs, service
information provided by the SCF, transport subscription
information provided by the NACF in access networks, and
resource-based admission decision results provided by TRC-FE.
controls the gates in the PE-FEs at per flow level.
consists of transport technology-independent resource control
functions and is independent of the SCF as well.
The policy rules used by PD-FE are service-based and are assumedto be provided by the network operators
FEs of Transport Control Functions
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Transport Resource Control (TRC)-FE
deals with the diversity of underlying transport technologies andprovides the resource-based admission control decision results
to PD-FE
is service-independent and consists of transport technology-
dependent resource control functions.
The PD-FE requests the TRC-FE instances in the involved transportnetworks through the Rt reference point to detect and determine the
requested QoS resource along the media flow path
may collect and maintain the transport network topology and
the transport resource status information and authorize
resource admission control of a transport network based on
network information such as topology and/or connectivity, network
and element resource availability, as well as the transport
subscription information in access networks
FEs of Transport Control Functions
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S-U1
S-ON2
S-TC5S-TC1 S-T3
S-12 Network
Signaling
Interworking FE
S-ON1
S-4: Subscription
Locator FE
S-5: Service User
Profile FE
S-TC2
S-ON3
S-U2
S-11: User
Signaling
Interworking FE
S-T5
Service Control
S-1: Serving Call Session
Control FE
S-T2S-TC3S-T1 S-TC4 S-T4
A-S1 A-S3 A-S4 A-S5 A-S6
Application Support Functions & Service Support Functions
S-15 General Services
Control FE
S-14: Media Resource
Broker FE
S-6: Service
Authentication
& Authorization FE
A-S2
S-3: Interrogating
Call Session Control FE
S-8: Access
Gateway Control
FE
S-7: Interconnection
Border Gateway
Control FE
S-2: Proxy Call
Session Control FE
S-13: Media
Resource
Control FE
S-10 Breakout
Gateway Control
FE
S-9: Media Gateway
Control FE
FEs of Service Control Functions
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Serving Call Session Control (S-CSC)-FE
handles functionality related to session control, e.g., registration,origination of sessions (session setup, modification, and teardown),
and routing of session messages
Registration: It can learn that a particular user and/or terminal
identifier is currently in service and can interact with the SUP-FE
(possibly via the SL-FE) to obtain relevant service profile and
address information
Service Triggering: Based on an analysis of the session control
messages it can route session control messages to appropriate
Application Support and Service Support functions
Determination of Routing of session control messages: It can
determine the routing for session control messages based on routing(location) information
FEs of Service Control Functions
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Proxy Call Session Control (P-CSC)-FE
acts as the contact point to the user terminal for session-based services forward session control requests related to registration to an appropriate I-
CSC-FE
forward session control requests received from the terminal to the S-CSC-
FE
forwards session control requests or responses to the terminal
detects and handles emergency session establishment requests.
maintains a security association between itself and each terminal.
perform message compression/decompression
may perform inter-domain topology hiding
may perform inter-domain protocol repair
participate in the authorisation of media resources and QoS management
supports an NAPT Proxy Function (NPF) for network address hiding and
remote NAPT traversal
FEs of Service Control Functions
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Interrogating Call Session Control (I-CSC)-FE
the contact point within an operator's network for all serviceconnections destined to a user of that network operator
Registration
Assigning an S-CSC-FE to a user performing SIP registration
Session-related and session-unrelated flows
Obtaining from the SUP-FE the address of the currently assigned S-CSC-FE.
Forwarding a SIP request or response to the S-CSC-FE determined by
the above step for incoming sessions.
Subscription Locator (SL)-FE
may be queried by the S-CSC-FE, I-CSC-FE, or AS-FE to obtainthe address of the SUP-FE for the required subscriber
is not required in networks that utilise a single logical SUP-FE
element
FEs of Service Control Functions
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Service User Profile (SUP)-FE
storing user profiles, subscriber-related location data, and presencestatus data in the Service stratum
It performs basic data management and maintenance functions
User profile management functions
authentication/authorization/service subscription information
subscriber mobility/location/presence (e.g., online/offline status) charging
It is responsible for responses to queries for user profiles
It provides access to user data
It may also be used for support of commonly AAA and security
schemes
FEs of Service Control Functions
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Service Authentication and Authorization (SAA)-FE
provides authentication and authorization in the service stratum It ensures that the end-user has valid utilization rights for the
requested service.
It performs policy control at the service level by using policy rules
contained in a user profile database.
It works as the first step in the mobility management process and isused for authentication, authorization, and accounting of
users/terminals.
The result of the authorization function is a yes/no response to a
user connection request
FEs of Service Control Functions
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Interconnection Border Gateway Control (IBGC)-FE
controls Interconnection Border Gateway Functional Entities (IBG-FEs) via RACF to interwork with other packet-based networks
Inter-domain network topology hiding
Control of IBG-FEs to implement session-based processing (E.g.
media conversion and NA(P)T).
Inter-domain protocol repair Interaction with PD-FE for resource reservation, resource allocation
and/or other resource related information (e.g., the available
resource parameters if the required resources are not available, QoS
label etc.)
FEs of Service Control Functions
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Access Gateway Control (AGC)-FE
controls one or more AMG-FEs to access PSTN or ISDN users andhandles registration, authentication, and security for the user
It originates and terminates session control signaling.
It originates and terminates gateway control flows to control AMG-
FE.
It may initiate and terminate UNI control flows in order to provideISDN (supplementary) services.
It forwards the session control flow to the S-CSC-FE.
It processes and forwards requests from the AMG-FE to the S-CSC-
FE
It may process and forward service requests from the AMG-FE tothe AS-FE through the S-CSC-FE
It supports an NAPT Proxy Function (NPF) for network address
hiding and remote NAPT traversal
FEs of Service Control Functions
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Media Gateway Control (MGC)-FE
controls the TMG-FE to interwork with PSTN/ISDN It processes and forwards requests from the SG-FE to the S-CSC-
FE through the I-CSC-FE
It may process and forward value-added service requests from
PSTN/ISDN to the AS-FE through the BGC-FE and S-CSC-FE.
Breakout Gateway Control (BGC)-FE
selects the network in which PSTN breakout is to occur and selects
the MGC-FE
FEs of Service Control Functions
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User Signalling Interworking (USIW)-FE
the interworking and information screening functions fordifferent types of application signalling at the subscriber side
(access-to-core), which can be located at the border of the access
and core networks for subscriber-side signalling interworking
Network Signalling Interworking (NSIW)-FE the interworking and information screening functions for
different types of application signalling at the trunk side (inter-
operator), which can be located at the border of the core networks
for trunk-side signalling interworking
FEs of Service Control Functions
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Media Resource Broker (MRB)-FE
assigns specific media server resources to incoming calls at therequest of service applications (i.e., an AS)
acquires knowledge of media server resource utilization that it can
use to help decide which media server resources to assign to
resource requests from applications.
employs methods/algorithms to determine media server resourceassignment.
acquires knowledge of media server resources status related to in-
service and out-of-service status and reservations via an operational
type of reference point
FEs of Service Control Functions
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General Services Control (GSC)-FE
It is expected to provide a platform for all envisaged services overpacket-based networks
GSC-FE acts as a contact point for application support and service
support functional entities, as well as user terminals
GSC-FE authenticates communications from these, and based on
those communications, the GSC-FE provides information onsession flows and their required QoS characteristics to the PD-FE,
as well as to the IBC-FE when appropriate.
The GSC-FE maintains session-related state as needed to assist in
policy actions.
FEs of Service Control Functions
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A-3: APL-SCM-FE*A-2: APL-GW-FE*
Applications
A-4: SS-FE
A-1: AS-FE*A-1: AS-FE*
Ap
plica
tionSu
pp
ortF
unctio
ns
and
Se
rvice
Suppo
rtFun
ction s
ANI
S-1: S-CSC-FE S-4: SL-FES-15: GSC-FE
S-6: SAA-FES ervice
C o n tro l
F u n cti o
n s
S-14: MRB-FE
Note: * may include Authentication, Authorization, and Accounting
S-5: SUP-FE
A-S4A-S1 A-S2 A-S6A-S5A-S3
T-9: SG-FE
T ra n sp o r t
P ro cess in
g
F u n ct io n s
End User
Functions
A-U1 A-T1
UNI
S-13: MRC-FE
FEs of ASF&SSF
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provides control for services accessed by interacting with
the S-CSC-FE, GSC-FE, or end-user directly may reside either in the End-users home network or in a
Third Party location
may comprise the following Functional Entities:
Application Server FE, Application Gateway FE,
Application Service Coordination Manager FE, and Service
Switching Functional Entity
generate session control requests and dialogs on behalf of
users
FEs of ASF&SSF
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It executes service logicbased on the subscribers service profile
and/or on the terminal capability (device profile)
It acts via four session interaction models with respect to the S-CSC-FE
(terminating user agent/originating user agent/SIP proxy/Third-Party
Call Control)
It interacts with the AGC-FE through the S-CSC-FE to provide access
to the applications required to support the legacy terminal users
It interacts with the MRC-FE directly or via the S-CSC-FE in order to
control MRP-FE
Optionally, it interacts with the MRB-FE in order to attain an MRC-FE
resource.
It interacts with the End-User Functions via UNI to allow the end-users
to securely manage and configure data for their application services.
FEs of ASF&SSF
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Application Support (AS)-FE
supports generic application server functions including hosting andexecuting services
The examples of AS-FE are call feature application servers,
presence servers, various messaging servers, conferences servers,
home application servers, and so on
Application Gateway (APL-GW)-FE
serves as an interworking entity between the Application and the S-
CSC-FE of the Service stratum
APL-GW-FE provides a secure open interface for the Applications
to use the capabilities and resources of the NGN
The Applications connected to APL-GW-FE are usually realized by
OSA Application Servers
FEs of ASF&SSF
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Application Service Coordination Manager (APL-
SCM)-FEManages interactions between multiple application services (or
servers).
The functional entities of ASF&SSF might interwork with each
other via APL-SCM-FE to provide convergent services to the end
users.
Service Switching Functional Entity (SS)-FE
Provides access and interworking to a legacy IN SCP
For the IN services, the S-CSC-FE is connected through SS-FE to
SG-FE to interact with a legacy IN SCP It provides IN service switching functions including service trigger
detection, service filtering, call state management, etc and the
protocol adaptation function between INAP and SIP
FEs of ASF&SSF
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PSTN/ISDN Emulation Service Component
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PSTN/ISDN emulation provides the emulation of
PSTN/ISDN services for legacy terminal connected viaresidential gateways and access gateways to the NGN
PSTN/ISDN Emulation Architecture
Call Server based PIEA
IMS based PIEA
The two solutions are suitable for different network
situations, but can provide equal emulation services
Overview
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Call Server-Based PIEA
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Call Control Function (CCF)
Two party call control function and multi-party call control;Access to IN capabilities (e.g. passes events to the SSF);
Access to PSTN/ISDN supplementary services in SPF;
Access to applications (e.g. passes events to the SIF for AS-FE)
Access Gateway Control Function (AGCF)
controls one or more AMG-FEs to access PSTN or ISDN users
Media Resource Control Function (MRCF)
controls MRP-FE and allocates resources which are needed for
services such as streaming, announcements, and Interactive
Voice Response (IVR) support
Call Server-Based PIEA
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Media Gateway Control Function (MGCF)
controls the TMG-FE to allow interworking with thePSTN/ISDN
Routing Function (RF)
analysis user characteristics (such as called party number,
service profile) and chooses the route to the destination user
include a routing policy function (such as routing based onaverage load sharing or time of the day etc. ), and the routing
database
Service Provider Function (SPF)
provide the PSTN/ISDN supplementary services to user
also provides the services logic about PSTN/ISDN
supplementary services
Call Server-Based PIEA
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Service Switching Function (SSF)
provides to access to IN service logic programs hosted in legacyService Control Points (SCPs)
Signaling Interworking Function (SIF)
is associated with CCF and performs the function ofProtocol
adapter
Call Server-Based PIEA
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Call Server-Based PIEA
R l i hi b CS PIEA d NGN
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CS based PES function and
functional entity NGN functional entity
CCF S-CSC-FE
RFRF is particular to CS Based
PSTN/ISDN Service component
SIF NSIW-FE
SSF SS-FE
SPF AS-FE
AGCF AGC-FE
MRCF MRC-FE
MGCF MGC-FE
Legacy Terminal Terminal Functions
Relationship bet. CS-PIEA and NGN
IMS b d PIEA
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Legacy terminals and/or legacy access nodes are connected to VoIP
Gateways (VGW) or Access Media Gateways (AMG) using
standard interfaces.
AMG or VGW connect to the IMS based PES via either the P1
reference point or the Gm reference point.
The P1 reference point enables an AMG without session control
capabilities to be accommodated in the architecture whilst the Gm
reference point extends IMS session control to a VGW.
PSTN/ISDN islands may also be connected via trunking media
gateway, controlled using the Mn reference point
IMS-based PIEA
IMS b d PIEA
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IMS-based PIEA
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Next Step
NGN S i C t i NGN R2
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NGN Service Components in NGN R2
N F ti i NGN R2
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New Functions in NGN R2
IPTV A hit t l O i
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IPTV Architectural Overview
IPTV S i C t
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IPTV Service Component
IPTV Functions
End-user functions Application functions
Service control functions
Content delivery functions
Network functions
Management functions Content provider functions
Content provider functions
It provides the content and associated metadata to content preparation
functions, which contain content & metadata sources.
IPTV S i C t
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IPTV Service Component
Content delivery functions
It performs cache and storage functionalities and deliver the contentaccording to the request from the end-user functions.
Content distribution & location control functions
Handling interaction with the IPTV service control functional block
Controlling the distribution of content from the content preparation functions
to the content delivery & storage functions
Gathering the information regarding content delivery & storage functions
Performing the selection of a suitable content delivery & storage functions to
serve end-users functions according to some criteria
Content delivery & storage functions
It stores, caches, process the content under the control of content preparation
functions and distribute it among instances of content delivery & storagefunctions
It is responsible for delivering content to the content delivery client functions
using the network functions
MMCF T t C t
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MMCF Transport Component
MMCF Transport Component
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MMCF Transport Component
MMCF: Mobility Management Controk Function
MMCF describes an architecture of Mobility Managementand Control Functions for the NGN transport stratum,
which includes the definitions of the functional entities of
MMCF and the scenarios for interactions with the other
NGN functional components
Mobile Location Management Function (MLMF) are used to providelocation registration of the UE
Handover Control Functions (HCF) are used to provide session
continuity for ongoing sessions of the moving UE
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Appendix : ETRIs BcN Products
Key Result: Open API
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Key Result: Open API
Key Result: NCP & QSR Series
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Key Result: NCP & QSR Series
Key Result: PON based FTTH
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Key Result: PON-based FTTH