2. 3GPP - The 3rd Generation Partnership Project (3GPP) unites [Six] telecommunications
standard development organizations (ARIB, ATIS, CCSA, ETSI, TTA, TTC), known
as “Organizational Partners” and provides their members with a stable environment to
produce the Reports and Specifications that define 3GPP technologies.
3GPP specifications and studies are contribution-driven, by member companies, in
Working Groups and at the Technical Specification Group level.
The Four Technical Specification Groups (TSG) in 3GPP are;
Radio Access Networks (RAN),
Service & Systems Aspects (SA),
Core Network & Terminals (CT) and
GSM EDGE Radio Access Networks (GERAN).
Remember: 3GPP do not produce standards. Instead, they produce Technical
Specifications (TS) and Technical Reports (TR) that are approved by TSGs (above). Once
approved they are submitted to the organizational partners to be submitted to their
respective standardization process.
3GPP names its specification by Release. For example, 3GPP release 5 contains the first
version of the IMS.
The responsibility for producing the Common IMS specifications in 3GPP lies largely with
the Services and System Aspects (SA) group.
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3. Since its creation in 2003, ETSI TISPAN (Telecommunications and Internet converged Services
and Protocols for Advanced Networking) has been the key standardization body in creating the
Next Generation Networks (NGN) specifications.
TISPAN is the ETSI core competence centre for:
• Next generation networks
• Fixed network interconnection
• Fixed network evolution and next generation network access, and etc.
TISPAN is responsible for coordination of NGN functions
• where an IP Multimedia Subsystem is referenced; this is in conjunction with 3GPP and in
accordance with the agreements regarding Common IMS
• which require cooperation with appropriate ETSI bodies or external organisations.
Source: http://portal.etsi.org/tispan/TISPAN_ToR.asp
NGN Release 1 was finalized in December 2005, provided the robust and open standards that
industry required for the development, testing and implementation of the first generation of
NGN systems. NGN Release 1 specifications adopt the 3GPP IMS (IP Multimedia Subsystem)
standard for SIP-based applications, but also add further functional blocks and subsystems to
handle non-SIP applications. Initially TISPAN worked on harmonizing the IMS core for both
wireless and wireline networks.
However in early 2008, the common IMS specifications were transferred back to 3GPP so that
one unique standards organization be responsible for providing a Common IMS fitting any
network (fixed, 3GPP, CDMA2000, etc.).
NGN Release 2 was finalized early 2008, and added key element to the NGN such as IMS and
non IMS based IPTV, Home Networks and devices, as well as NGN interconnect with Corporate
Networks.
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4. Initially, IMS was an all-IP system designed to assist mobile operators deliver next
generation interactive and interoperable services, cost-effectively, over an architecture
providing the flexibility of the Internet.
Session Initiation Protocol was selected as the signalling mechanism for IMS, thereby
allowing voice, text and multimedia services to traverse all connected networks. 3GPP
works closely with experts in the IETF to ensure maximum re-usability of internet
standards, preventing fragmentation of IMS standards.
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5. Note: TS 23.002 presents the possible architectures of the 3GPP System, covering both
UTRAN, GERAN radio access technologies, Evolved Packet System, IMS etc. Source:
3GPP TS 23.002 V12.5.0 (2014-06) http://www.3gpp.org/DynaReport/23002.htm
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8. IMS architecture can be simplified for understanding by applying ‘layer’. Separation of
service from session control, transport and access in the general architecture is enabling
the capabilities for fixed mobile convergence into single core network, and empower
speedy service development and deployment on the top most layer.
The proposed architecture is meant to simplify the delivery of these services regardless
of subscriber access method weather connecting via LAN, , WiMAX/WiFi, 3G, or home
broadband services.
The architecture itself invites vendors to compete and offer IMS components to the
carriers. This natural market behavior will help carriers with the IP communications
services build out process by providing multiple vendors, several technology choices and
price comparison for IMS technology.
As RFC standards provide some assurance that protocols will behave as expected
regardless of the software delivering the service
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11. The S-CSCF (IMS Core) shall decide whether an Application Server is required to receive
information related to an incoming SIP session request to ensure appropriate service handling..
The decision at the S-CSCF is based on (filter) information received from the HSS.
Source : 3GPP TS 23.228 V5.15.0 (2006-06), Technical Specification Group Services and System
Aspects
SIP AS Definition:
SIP Application Server: Host and execute IMS specific services;
IM-SSF Definition:
IP Multimedia Service Switching Function. Interfaces SIP to CAP to communicate
with CAMEL Application Servers;
OSA CSC Definition:
OSA Service Capability Server (OSA SCS) : Interfaces SIP to the OSA framework;
CAMEL Definition:
The CAMEL Application Part (CAP) is a signalling protocol used in the Intelligent Network
(IN) architecture. CAP is based on a subset of the ETSI Core and allows for the implementation of
carrier-grade, value added services such as unified messaging, prepaid, fraud control and
Freephone in both the GSM voice and GPRS data networks. CAMEL is a means of adding
intelligent applications to mobile (rather than fixed) networks.
Source : Wikipedia
OSA Definition:
The Open Service Access or OSA is part of the third generation
mobile telecommunications network or UMTS. OSA describes how services are designed in a
UMTS network.
The standards for OSA are being developed as part of the 3rd Generation Partnership Project
(3GPP). The standards for OSA are published by ETSI and 3GPP.
The API for OSA is called Parlay, (or Parlay/OSA or OSA/Parlay) as the APIs are developed jointly
in collaboration by 3GPP, ETSI, and the Parlay Group.
Source : Wikipedia
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![3GPP - The 3rd Generation Partnership Project (3GPP) unites [Six] telecommunications
standard development organizations (ARIB, ATIS, CCSA, ETSI, TTA, TTC), known
as “Organizational Partners” and provides their members with a stable environment to
produce the Reports and Specifications that define 3GPP technologies.
3GPP specifications and studies are contribution-driven, by member companies, in
Working Groups and at the Technical Specification Group level.
The Four Technical Specification Groups (TSG) in 3GPP are;
Radio Access Networks (RAN),
Service & Systems Aspects (SA),
Core Network & Terminals (CT) and
GSM EDGE Radio Access Networks (GERAN).
Remember: 3GPP do not produce standards. Instead, they produce Technical
Specifications (TS) and Technical Reports (TR) that are approved by TSGs (above). Once
approved they are submitted to the organizational partners to be submitted to their
respective standardization process.
3GPP names its specification by Release. For example, 3GPP release 5 contains the first
version of the IMS.
The responsibility for producing the Common IMS specifications in 3GPP lies largely with
the Services and System Aspects (SA) group.
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