enabling architectures protocols and frameworks for today’s service provider networks etc group,...

Enabling ArchitecturesProtocols and Frameworks

For Today’s

Service Provider Networks

ETC GROUP, LLC | David J . Malfara, Sr.

Institute of Public Utilities, Michigan State University

2014 Annual Regulatory Studies Program

Agenda• Network Evolution: Beyond the OSI Model• IMS – A New “Control” Layer• Applications: Network-centric or OTT?• Discussion - Futures

Protocols & Frameworks

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Operational View

Voice Internet

“Old World” Monolithic Stovepipe

Structure

“New World” Layered Next-Gen Structure

Flat Growth of Voice Market

Massive Growth ofData Traffic

Maturity ofConvergence Technology

Drivers

OSS

/BSS

New Service Opportunities

New Efficient OAM&P

New Network Architecture

Outcome

Order Processing

Account Provisioning

Service Provisioning

Administration

Maintenance

Sales/VendorBSS

Order Processing



Administration

Maintenance

Sales/VendorBSS

Private/VPN Networking

Order Processing



Administration

Maintenance

Sales/VendorBSS

Service/Application Layer

Control Layer

Transport Layer

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Service Provider Nirvana

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©2010 SeaChange

Competing Models

OSI vs. NGN

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The Encapsulation of Functions in a Packet Architecture (OSI Model)

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Comparing TDM to VoIPThe OSI Reference Model

TDM VoIP

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Current “Option”:TDM Interconnection

Every Access TandemEvery LATA

Competitor RBOC

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TDM Interconnection(Dedicated High Cost – CapEx and OpEx)

TDM – Minimum Interconnection Points

SignalingGateway

IPNetwork

IP

IP

UserEnd Points

IP

Soft Switch

Media Gateway

Media Gateway

Media Gateway

Media Gateway

LATA 1

Media Gateway

LATA 2

LATA 4

LATA 5

LATA 3

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VoIP-to-TDM Interconnection Transition

Media Gateway:TDM/IP (Circuit to Packet)

Signaling Gateway:SS7/SIP (Packet to Packet)

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Inter-carrier VoIP Call Interconnection Using SBC Functionality

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Multimedia Networks

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EvolutionOSI to IMS-enabled NGN

Application

Presentation

Session

Transport

Network

Data Link

Physical

OSI MODEL NGN MODEL

© 2011 ETC Group, LLC

Application

Transport

Control

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IMS – A New “Control” Layer

Converging Network Intelligence

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IMS - Industry Adoption

• 3GPP (3rd Generation Partnership Project including ATIS)

• IETF (Internet Engineering Task Force)

• European Telecommunications Standards Institute

(TISPAN)

• ITU-T (ITU-Telecommunications Standardization Sector)

• CableLabs® (PacketCable 2.0)

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IMS-enabledConvergence

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IPMultimedia Subsystem

© Radvision

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CableLabs®

PacketCable 2.0 Reference Architecture

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ETSI – TISPANIMS-Oriented NGN Architecture

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IMSTerminal

IMS Network Provider

IP Connectivity Access Network

1. Establishment of an IMS service contract

3. P-CSCF address discovery

2. Getting IP access connectivity

Acquiring an IP address

4. IMS level registration

From The 3G IP Multimedia Subsystem (IMS), Third EditionGonzalo Camarillo and Miguel A. García-Martín

© 2008 John Wiley and Sons, Ltd.

Prerequisites to get the IMS service

IMS PrerequisitesIMS

TerminalIMS Network

ProviderIP Connectivity Access

Network









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IMSTerminal

(1) REGISTER

P-CSCF

(10) 401 Unauthorized

S-CSCF

(2) REGISTER


(11) REGISTER

(20) 200 OK

(12) REGISTER

(19) 200 OK

I-CSCF HSS

(3) Diameter UAR

(4) Diameter UAA

(5) REGISTER


(6) Diameter MAR

(7) Diameter MAA

(13) Diameter UAR

(14) Diameter UAA

(15) REGISTER

(18) 200 OK

(16) Diameter SAR

(17) Diameter SAA



Registration at the IMS level

IMS RegistrationIMS

TerminalIMS Network


Network









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IMSTerminal #1

(1) INVITE

P-CSCF

(18) 183SessionProgress

P-CSCF

(3) INVITE

(17) 183 Sesssion Progress(19) 183Session Progress

(21) PRACK

S-CSCF S-CSCF

(7) Diameter LIR

(8) Diameter LIA

(15) 183 Session Progress

(22) PRACK

(26) 200 OK(27) 200 OK

(37) 200 OK

(25) PRACK(24) PRACK

(32) UPDATE

(36) 200 OK

(30) 200 OK

(31) UPDATE

(40) 200 OK

I-CSCF HSSIMS

Terminal #2

(5) INVITE

(2) 100 Trying (4) 100

Trying

(6) 100 Trying

(9) INVITE

(10) 100 Trying

(11) INVITE

(12) 100 Trying (13) INVITE

(14) 100 Trying

OriginatingVisited

Network

OriginatingHome

NetworkTerminating Home Network

TerminatingVisited

Network

(16) 183 Session Progress

(20) 183 SessionProgress

(29) 200 OK

Resou

rce Reservatio

n

Resou

rce Reservatio

n

(34) UPDATE(35) UPDATE

(38) 200 OK(39) 200 OK

Pre-alert user

Alert user

(33) UPDATE

(28) 200 OK

(23) PRACK

Evaluation of initial filter criteria

Evaluation of initial filter criteria



Basic session setup, part 1

Session Setup (1)IMS

TerminalIMS Network


Network









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IMSTerminal #1

(63) ACK

P-CSCF

(44) 180Ringing

P-CSCF

(64) ACK

(43) 180 Ringing

(45) 180Ringing

(47) PRACK

S-CSCF S-CSCF

(41) 180Ringing

(48) PRACK

(52) 200 OK(53) 200 OK

(58) 200 OK

(51) PRACK(50) PRACK

(57) 200 OK(56) 200 OK

(61) 200 OK

I-CSCF HSSIMS

Terminal #2

(66) ACK

OriginatingVisited

Network

OriginatingHome

NetworkTerminating Home Network

TerminatingVisited

Network

(42) 180Ringing

(46) 180Ringing

(55) 200 OK

(67) ACK

(59) 200 OK(60) 200 OK

Alert user

(54) 200 OK

(49) PRACK

Acceptsession

(62) 200 OK

Media plane

(65) ACK



Basic session setup, part 2

Session Setup (2)IMS

TerminalIMS Network


Network









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User Profile

Service Profile n

Service Profile 2

Service Profile 1

Public Identification n1 to n

Public Identification 2

Private User Identity

1 to n

Public Identification 1

Shared Initial Filter Criteria n

Shared Initial Filter Criteria 2

Shared Initial Filter Criteria 1

0 to n

Initial Filter Criteria n

Initial Filter Criteria 2

Initial Filter Criteria 1

0 to n



Simplified representation of the structure of the user profile

IMSHSS User Profile

IMSTerminal











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S-CSCF

IMSHome

Network

AS

P-CSCF

1. INVITE 2. INVITE

3. IN

VIT

E

4. 200 OK

5. 200 OK6. 200 OK



An Application Server acting as a terminating SIP UA is providing services in the originating call leg

IMS Application ServerInitial Filter Criteria

IMSTerminal











Initial Filter Criteria

Application Server

Trigger Point

Trigger Point

Service Point Trigger

SIP URI

Default Handling

1 to n

Priority



Request-URI

SIP Method

SIP Header

Session Case

Session Description

0 to 1

Service Information



Structure of initial filter criteria

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S-CSCF

IMSHome

Network

AS

I-CSCF

1. INVITE 2. INVITE

9. 200 OK10. 200 OK

3. IN

VIT

E 4. IN

VIT

E 8. 2

00 O

K 7. 2

00 O

K

RTP

MRFC

MRFP



An example of a service

IMS Application ServerService Announcement Example

IMSTerminal











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S-CSCF

IMSHome

Network

AS #2

I-CSCF

1. INVITE 2. INVITE

19. 200 OK20. 200 OK

5. IN

VIT

E

6. IN

VIT

E

16. 20

0 O

K

15. 20

0 O

K

AS #1 AS #3

9. INVITE

P-CSCF

10. INVITE

12. 200 OK 11. 200 OK



A few Application Servers providing services

IMS Application ServerMulti-service Session

IMSTerminal











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Access Network

XDMC

Shared XDMS

Shared Group XDMS

Shared Profile XDMS

Shared Lists XDMS

Shared Policy XDMS

XDM-3/XDM-5

P-/S-CSCF

Application 1Specific XDMS

Application 2Specific XDMS

Application nSpecific XDMS

XDM-1

XDM-2

XDM-6

XDM-4

XDM-7

Application 1 Application 2 Application n

SearchProxy

XDM

Remote Aggregation

Proxy

AggregationProxy XDM-8

XDM-9



XML Document Management (XDM) architecture

Service Configurationin the IMS (Open Mobile Alliance -XDM)

IMS Services PresenceLocationInstant MessagingConferencingMultimedia Session Continuity

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Future ApplicationsUsing IMS “Enablers”

• Broadcast with Awareness

• Workflow Conferencing

• Co-existent Location based Sharing

• Location-based Advertising

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Questions?

[email protected]

ETC GROUP, LLC | David J . Malfara, Sr.

enabling architectures protocols and frameworks for today’s service provider networks etc group,...

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