Transcript Mapping of Wireless Data Services to Preferred Speeds

7. Convergence of fixed and mobile networks basing on
IP Multimedia Subsystem (IMS) paradigm
.
7.1. Fixed-mobile convergence, IMS definition, standardization
7.2. IMS-3GPP architecture, main building blocks
7.3. IMS-TISPAN architecture
7.4. IMS services
7.5. Conclusion
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Abbreviations
3GPP: 3G Partnership Project
AS: Application Server
BGCF: Breakout Gateway Control
Function
CDMA: Code Division Multiple
Access
CS: Circuit Switched
CSCF: Call Session Control
Function
CUG: Closed User Group
DSL: Digital Subscriber Line
GPRS: General Packet Radio
Service
GSM: Global System for Mobile
communications
GUI: Graphical User Interface
HSS: Home Subscriber Server
IETF: Internet Engineering Task
Force
IMS: IP Multimedia Subsystem
IMS-MGW: IP Multimedia
Subsystem – Media Gateway
Function
IP: Internet Protocol
ISIM: IP Multimedia Services
Identity Module
ISP: Internet Service Provider
IVR: Interactive Voice Response
LAN: Local Area Network
MAC: Medium Access Protocol
MGCF: Media Gateway Control Function
MRFC: Multimedia Resource Function
Controller
MRFP: Multimedia Resource Function
Processor
MS: Mobile Station
MVNO: Mobile Virtual Network Operator
PDF: Policy Decision Function
POC: Push-to-talk Over Cellular
PS: Packet Switched
PLMN: Public Land Mobile Network
PSTN: Public Switched Telephone Network
RAN: Radio Access Network
SCIM: Service Capability Interaction
Manager
SGF: Signaling Gateway Function
SIM: Subscriber Identity Module
SLP: Subscription Locator Function
UE: User Equipment
UMTS: Universal Mobile
Telecommunications System
WLAN: Wireless Local Area Network
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7.1. Fixed-mobile convergence, IMS
definition, standardization
A. Definition of FMC
The following definition of FMC is based on the ETSI FMC ad hoc
workgroup docs:
Fixed and Mobile Convergence (FMC) is concerned with the provision of
network and service capabilities, which are independent of the access
technique. This does not necessarily imply the physical convergence of
networks. It is concerned with the development of converged network
capabilities and supporting standards. This set of standards may be used to
offer a set of consistent services via fixed or mobile access to fixed or
mobile, public or private networks.
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B. FMC motivations
Customer motivations – more mobility with required list of services
# The FMC greatest benefits - for the end-user
# Mobility of people and the need to communicate on the move
# Conventional fixed networks continue to serve the home or the office
# Wide range of services within a uniform network
# Quality standards regarding reliability, security, etc.
Three aspects of mobility - terminal/service/personal mobility:
• Terminal mobility - the use of personal terminal at any place
• Service mobility - set of services independent of the access type and location
• Personal mobility - the customer is reachable with one number, his personal number,
everywhere.
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FMC motivations
• Operator motivations – better position on the market –increasing
revenue, gaining new users
# FMC can be understood as a marketing strategy to attract new customers by
launching new innovative products
# Offering customized set of attractive services: (VPN, VHE, …)
# IN Services developed in fixed networks - Call Forwarding, Personal Number
# Services developed in mobile networks - Prepaid Service, SMS
# Investment cost saving (HW/SW for billing, IN equipment,…)
# Operational cost savings (common OAM processes, common numbering plan,…)
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C. FMC components
Fixed-mobile convergence involves:
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unified core network
multi-radio terminals
devices such as PCs, PDAs, fixed phones
common multi-access service delivery platform
FMC is described through the four distinct
categorizations:
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service convergence
terminal convergence
network convergence
industry convergence
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Service convergence
Focus - on end-user requirements and the service experience.
The primary goal is the concurrent delivery of all media types
— voice, data, and video— to an easy-to-use graphical user
interface, with mobility, access, and device awareness.
Multitude of services (person-to-person, person-to-content, and
content-to-person) can be provided to the same user over
different access networks and to different devices.
From a service perspective, the consumer and enterprise user
expect convenience, ease of use, reliability, security and support
to be always connected in the best way.
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Terminal convergence
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Network convergence
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Industry convergence
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D. IMS Definition
• The IP Multimedia Subsystem (IMS) is a standardized NGN architecture
for telecom operator that want to provide mobile and fixed multimedia
services. It uses a VoIP implementation based on a 3GPP standardized
implementation of SIP, and runs over the standard IP. Existing both PS and
CS systems are supported.
• The aim of IMS - providing all services for fixed and mobile users.
• IMS provides the unified architecture that supports a wide range of IPbased services over both packet- and circuit-switched networks, employing
a range of different wireless and fixed access technologies.
• IMS uses open standard IP protocols.
• Interfaces for service developers are also based on IP protocols.
• For providers - the ability to control and charge for each service.
• For users – the ability to execute all their services when roaming as well as
from their home networks.
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E. IMS Standardization
IP Multimedia Subsystem (IMS) is a concept developed and
specified by the 3rd Generation Partnership Project (3GPP).
Currently 3GPP includes different SDOs:
• Alliance for Telecommunications Industry Solutions (ATIS) - USA
• Association of Radio Industries and Businesses (ARIB) - Japan
• China Communications Standards Association (CCSA)
• European Telecommunications Standards Institute (ETSI)
• Telecommunications Technology Association (TTA) – Korea
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IMS Standardization
3GPP
Release 1999 (R’99)
First 3GPP standards for UMTS. Base for al UMTS networks
Release 4 (Rel’4) – 2001
Evolution of UMTS architecture, transport and interfaces
Release 5 (Rel’5) – 2002
Next phase of UMTS evolution. Introduction of the IMS concept. Minimum
release for IMS is R'5
Release 6 (2003)
• Mobile networks and WLAN interconnection
• ММ multicasting
Release 7 (2004)
• Fixed/mobile convergence. Mobile and fixed networks interaction (together
with ETSI-TISPAN)
TISPAN - Telecoms & Internet converged Services & Protocols for
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Advanced Networks
IMS Standardization
3GPP2
• The Third Generation Partnership Project 2 (3GPP2) is a 3G
telecommunications specifications-setting project comprising North
American and Asian interests developing global specifications for
ANSI/TIA/EIA-41 network evolution to 3G
• 3GPP2 was born out of the ITU International Mobile Telecommunications
"IMT-2000" initiative, covering high speed, broadband, and IP-based mobile
systems featuring network-to-network interconnection, service transparency,
global roaming and seamless services independent of location.
• 3GPP2 is a collaborative effort between five officially recognized SDOs:
ARIB- Association of Radio Industries and Businesses (Japan)
CCSA - China Communications Standards Association (China)
TIA - Telecommunications Industry Association (North America)
TTA - Telecommunications Technology Association (Korea)
TTC - Telecommunications Technology Committee (Japan)
• 3GPP2 based their CDMA2000 Multimedia Domain (MMD) on 3GPP IMS,
adding support for CDMA2000
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7.2. IMS-3GPP architecture, main building blocks
A. IMS layered architecture
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IMS layered architecture - key assumptions
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B. IMS main building blocks
AS - Application Server
CSCF - Call Session Control Function
HSS - Home Subscriber Server
SG – Signaling Gateway
MGCF – Media Gateway Control Function
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C. IMS Elements
P-CSCF – Proxy CSCF
S-CSCF – Serving CSCF
I-CSCF – Interrogate CSCF
MGCF - Media Gateway Control Function
MGF - Media Gateway Function
MRFC - Multimedia Resource Function Controller
MRFP - Multimedia Resource Function Processor
BGCF - Breakout Gateway Control Function
HSS – Home Subscriber Server
HLR – Home Location Register
AS – Application Server
SCIM – Service Capability Interaction Manager
RAN – Radio Access Network
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7.3. IMS-TISPAN architecture
TISPAN-NGN Genesis
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A. TISPAN Standards
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TISPAN-3GPP Standards
• 􀂉 Minimum release for IMS is R'5
• 􀂉 R’1 ETSI/TISPAN (2005) is based on 3 GPPR'6 and a
part of R'7, and on TISPAN additional work
• 􀂉 2008/2009: introduction of the full IMS mobile (based on R7
which is full IP including voice, which is standardized in 2006
• 􀂉 Simultaneously, evolution of the Fixed IMS (based on
TISPAN standards by 2006/07), which will strictly comply with R7
• 􀂉 By 2008/2009, we may have the same IMS implementation
for both fixed and mobile networks
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B. 3GPP-TISPAN Architecture
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Network Attachment Subsystem (NASS)
NASS provides registration at access level and
initialization of CPE for an access to IMS services
Main functionalities:
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IP address allocation
Authentication, taking place at the IP layer (prior or during
the address allocation procedure)
Authorization of network access (based on user profiles)
Location management, taking place at the IP layer
Interactions between authentication at the network
attachment level and at the SIP level.
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Resource and Allocation Control Subsystem (RACS)
RACS provides to applications a mechanism to request and
reserve the resources from access network
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8.4. IMS services
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IMS service requirements
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List of IMS services
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Voice
Presence
Content Sharing
SMS and Multimedia Messaging
Instant Messaging
Voice Messaging
Push to Talk Over Cellular (PoC)
Real Time Video Sharing
Video Conferencing
Interactive Gaming
Media Store Access
Browsing
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PoC - new IMS-based service in wireless networks
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IMS QoS classes
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7.5. Conclusion - FMC basing on IMS is here
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Key attractions of IMS
• Access independence: IMS will eventually work with any network (fixed
or mobile) with packet-switching functions, such as CDMA2000, GPRS,
UMTS, and WLAN. Open interfaces between control and service layers
allow elements and calls/sessions from different access networks to be
mixed.
• Different network architectures: IMS allows operators and service
providers to use different underlying network architectures.
• Terminal and user mobility: The mobile network provides terminal
mobility, while user mobility is provided by IMS and SIP.
• Extensive IP-based services: IMS should make it easier to offer just
about any IP-based service. Examples include voice over IP (VOIP), pushto-talk over cellular (POC), multiparty gaming, video/audio conferencing,
and content sharing.
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FMC convergence basing on IMS architecture
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Possible FMC Macro Steps
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Abbreviations
3GPP: 3G Partnership Project
AS: Application Server
BGCF: Breakout Gateway Control
Function
CDMA: Code Division Multiple
Access
CS: Circuit Switched
CSCF: Call Session Control
Function
CUG: Closed User Group
DSL: Digital Subscriber Line
GPRS: General Packet Radio
Service
GSM: Global System for Mobile
communications
GUI: Graphical User Interface
HSS: Home Subscriber Server
IETF: Internet Engineering Task
Force
IMS: IP Multimedia Subsystem
IMS-MGW: IP Multimedia
Subsystem – Media Gateway
Function
IP: Internet Protocol
ISIM: IP Multimedia Services
Identity Module
ISP: Internet Service Provider
IVR: Interactive Voice Response
LAN: Local Area Network
MAC: Medium Access Protocol
MGCF: Media Gateway Control Function
MRFC: Multimedia Resource Function
Controller
MRFP: Multimedia Resource Function
Processor
MS: Mobile Station
MVNO: Mobile Virtual Network Operator
PDF: Policy Decision Function
POC: Push-to-talk Over Cellular
PS: Packet Switched
PLMN: Public Land Mobile Network
PSTN: Public Switched Telephone Network
RAN: Radio Access Network
SCIM: Service Capability Interaction
Manager
SGF: Signaling Gateway Function
SIM: Subscriber Identity Module
SLP: Subscription Locator Function
UE: User Equipment
UMTS: Universal Mobile
Telecommunications System
WLAN: Wireless Local Area Network
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Books
• The 3G IP Multimedia Subsystem (IMS):
Merging the Internet and the Cellular
Worlds
by Gonzalo Camarillo, Miguel-Angel GarcíaMartín (John Wiley & Sons, 2006)
• The IMS: IP Multimedia Concepts and
Services
by Miikka Poikselka, Aki Niemi, Hisham Khartabil,
Georg Mayer (John Wiley & Sons, 2006)
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