The document discusses 3GPP, LTE, IMS, and VoLTE. It begins with an introduction to 3GPP as the standards body that includes seven telecommunications organizations and defines cellular technologies. It then covers the evolution of 3GPP standards from 2G to 4G LTE and emerging 5G technologies. IMS is introduced as 3GPP's IP Multimedia Subsystem specification that allows the delivery of multimedia over packet networks. Finally, VoLTE is defined as using IMS to provide voice calls over an LTE network.

1. 3GPP , LTE and IMS VOLTE
By Nitin Gupta

2. ›What is 3GPP ?
›3GPP Evolution
›3GPP Specification Formation Flow
›Basic 2G , 3G architecture
›LTE (Long Term Evolution )
›IMS (IP Multimedia Subsystem )
›VOLTE (Voice over LTE )
Agenda

3. Telecom Industry
Network
equipment
Manufacture
(Ericsson ,
Huawei,Nokia
Networks)
Mobile
Equipment
manufactures
(Samsung ,
LG , HTC )
Network Simulator
Manufactures(Anite ,
R&S,Spirent,Anritsu)
Operators
(Airtel ,
Vodafone ,
Idea ,
Reliance)
Chipset
Manufactures
(Qualcomm ,
Intel,
Mediatek ,
Spreadtrum)

4. 3GPP INTRODUCTION

5. › 3rd Generation Partnership Project (3GPP) unites [Seven] telecommunications
standard development organizations (ARIB, ATIS, CCSA, ETSI, TSDSI, 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 and there organizational partners

6. • TSDSI "Telecommunications Standards Development Society, India" aims at
developing and promoting India-specific requirements, standardizing solutions for
meeting these requirements and contributing these to international standards,
contributing to global standardization in the field of telecommunications.
• "This is to announce that as of 1st January, 2015, TSDSI has become a full-fledged
Organizational Partner (OP) of the 3rd Generation Partnership Project (3GPP).”
TSDSI Organizational Partner
FROM INDIA (1st January, 2015)
S.N. Rights Corporate Associate
1
Participation in General
Yes Yes
Body Meetings, testevents, seminars,workshops
2
Inclusion in mailing list for
Yes Yes
information about events
3
Online access to initial
Yes Yes
draft Standard formulatedby TSDSI
4
Online submission of
Yes Yes
comments on initial draft Standard formulated by TSDSI
5
Participation in technical
Yes Yes
committees, workinggroups of TSDSI
6
Participation in meetings
Yes No
of standards bodies inwhich TSDSI is a Partner Organization
7
Representation in the
Yes No
Governing Council
8
Voting rights in General
Yes No
Body and in relevant specific technical issues
9
Request for formulation of
Yes Yes
a fresh Standard

7. The 3GPP Eco-system

8. 3GPP Evolution from 2G to LTE
Advanced

9. 9
Evolution of the Radio Interface and there
speed
EDGE EDGE+
W-CDMA HSPA HSPA+
20002000
LTE LTE-Advanced
9
20102010
384Kb/s 1Mb/s
384Kb/s 42Mb/s18Mb/s
100Mb/s 1000Mb/s
Standards availability

10. Evolution 4G to 5G

11. LTE Advanced Pro (4.5G)

12. Specification Formation Flow 3gpp

13. LTE UE Specifications for Big
Picture.

14. Start, Freeze and End dates
For LTE 3GPP Releases

15. LTE INTRODUCTION

16. 2G Architecture

18. • LTE stands for Long Term Evolution and it was started as a project in 2004
by telecommunication body known as the Third Generation Partnership
Project (3GPP).
• LTE evolved from an earlier 3GPP system known as the Universal Mobile
Telecommunication System (UMTS), which in turn evolved from the
Global System for Mobile Communications (GSM).
LTE

19. LTE Network Architecture

20. The E-UTRAN (The access network)

21. The Evolved Packet Core (EPC) (The core
network)

22. LTE Basic Architecture

23. LTE Protocol Stack of UE , ENB and
MME

24. LTE Channels

25. LTE Architecture in Detail

26. IMS

27. • IMS is one of 3GPP’s greatest success stories.
• Originally designed to evolve UMTS networks to deliver Internet Protocol
multimedia to mobile users.
• IMS has become the core component within 3G, cable TV and next
generation fixed telecoms networks.
• IMS specification began in 3GPP Release 5 as part of the core network
evolution from circuit-switching to packet-switching and was refined by
subsequent Releases 6 and 7.
IMS (IP-Multimedia Subsystem)

28. IMS
The IP Multimedia Subsystem
IMS
Capture the benefits of convergence
GSM/
WCDMA DSL WLAN PSTNLTE
LTE
GSM
WCDMA

29. Standardization bodies FOR IMS/VOLTE
IMS Architecture
SIP, Diameter
Presence,
MessagingVoLTE
Global System for Mobile
Communications

30. IMS Architecture

31. • User Equipment (UE) is the mobile terminal which may be a smartphone
or tablet or any communication device which is authorized to be used in
the network. An IMS powered UE has two main components.
• Universal Integrated Circuit Card (UICC)
• Session Initiation Protocol User Agent (SIP UA)
Special User Equipment (UE)

32. • Each UE must contain one UICC and each UICC may have one or more of
the following modules.
• Subscriber Identity Module (SIM): SIM identity information used by a
GSM network.
• UMTS Subscriber Identity Module (USIM): USIM information used by a
UMTS or LTE network.
• IP Multimedia Services Identity Module (ISIM): ISIM identity information
used by the IMS subsystem.
Universal Integrated Circuit (UICC)

33. • SIP User Agent resides in the UE to transmit and receive SIP messages.
SIP-UA provides basic telephony functionality. It can act in two different
roles:
• User Agent Client (UAC): As a client to send SIP request
• User Agent Server (UAS): As a server to receive requests and send
response
SIP User Agent (SIP-UA)

34. THE IMS CORE

35. • Call Session Control Function (CSCF)
CSCF is responsible for establishing, monitoring, supporting and releasing multimedia
sessions. It has three different functional elements which may or may not be separate
physical entities.
• Proxy CSCF: P-CSCF is seen as the initial point of contact from any SIP User Agent. It
handles all requests from the UE and is, from the UE’s point of view, the “SIP proxy”
to the entire subsystem.
• Interrogating CSCF: I-CSCF is the entity that initiates the assignment of a user to an S-
CSCF (by querying the HSS) during registration.
• Serving CSCF: S-CSCF has knowledge about the user and what applications are
available to the user. It acts as a decision point and it’s main job is to decide whether
or not the user’s SIP messages will be forwarded to the application servers.
IMS core has the following important nodes

36. • Home Subscriber Server (HSS) :HSS is a database that maintains user profile and
location information and is responsible for name/address resolution. HSS is also
responsible for authentication and authorization.
• Subscriber Location Function (SLF) :SLF is responsible for assigning HSS to user in
home network. To achieve this function SLF keeps track of all HSS.
• Media Gateways :Media Gateway resides at the interface between SIP based IMS
network and traditional PSTN network.
• Media Gateway Control Function(MGCF) :Media Gateway Control Function controls
media gateways, converts codecs where necessary and may serve as a breakout to a
circuit-switched network.
• Breakout Gateway Control Function (BGCF) :When Media Gateway Control Function
does not include breakout to circuit-switched network, BGCF takes care of this
functionality.
Other IMS nodes

37. IMS BIG PICTURE

38. • IMS is made up of a lot of different set of specification interplaying each other which
create a lot of confusions.
IMS Specifications

39. VOLTE

40. VoLTE Architecture

41. VoLTE QOS

42. THANK YOU