Submitted to :- Presented by :- Mr. Suraj Sharma Bhavik Jain Mr. Saurabh Sharma (13EIAEC015)

INSTITUTE OF ENGINEERING & TECHNOLOGY , ALWAR

Institute of Engineering & Technology College , Alwar

.

Institute of Engineering & Technology College, Alwar

Reliance Jio Infocomm Ltd, Ahmedabad

Introduction

Reliance Jio Infocomm Limited (RJIL), a subsidiary of Reliance

Industries Limited (RIL), India’s largest private sector company, is

the first telecom operator to hold pan India Unified License. This

license authorises RJIL to provide all telecommunication services

except Global Mobile Personal Communication by Satellite

Service.

Contents

1. IP Multimedia Sub System(IMS)2. VoLte3. SIP4. Call Testing5. Call Flow Chart6. Conclusion

1. What is IMS ? IMS is a global, access independent and standard based IP connectivity

and service control architechture that enables various types of

multimedia services to end-users common Internet based protocols.

IMS is the 3GPP standard architecture for delivering multimedia services

in next generation networks. IMS is a logical layer that runs over IP and

uses SIP for sessions’ initiation. Besides, sessions’ initiation and

multimedia delivery, IMS will provide very efficient accounting and

charging services for operators. The major strength of IMS is that it is a

multi-operator and multi-handset-vendor platform that will allow end

users to connect regardless of their location (i.e., operator) and their

handset type.

IMS Architecture

P-CSCF

• Proxy-Call Session Control Function (P-CSCF)

– The first contact point for users within the IMS

– All SIP signaling traffic from or to the UE go via the P-CSCF

• P-CSCF may behave as a user agent (UA)

– release sessions in abnormal conditions e.g.,when a bearer loss

is detected according to service-based local policy

– generate independent SIP transactions

• There can be one or many P-CSCFs within an operator's network

I-CSCF• Interrogating-CSCF (I-CSCF)

– a contact point within an operator's network for all connections

destined to a subscriber of the network operator

– there may be multiple I-CSCFs within an operator's network

• Functions performed by I-CSCF

– contact the HSS to obtain the name of the S-CSCF that is serving a

user

– assign an S-CSCF based on received capabilities from the HSS

– forward SIP requests or responses to the S-CSCF

– send accounting-related information to the CCF (Charging Collection

Function)

S-CSCF

• Serving-CSCF (S-CSCF)

– the brain of the IMS

– located in the home network

– performs session control and registration services for UEs

• There may be multiple S-CSCFs, and S-CSCFs may have different

functionalities within an operator's network

• Functions performed by S-CSCF

- handle registration requests by acting as a registrar

- download user information and service-related data from the HSS during

registration or when handling a request to an unregistered user

Home Subscriber Server• Home Subscriber Server (HSS)

– the main data storage for all subscriber and service-related data of

the IMS

• The main data stored in HSS - user identities

1. private user identity - the user identity that is assigned by the home

network operator and is used for such purposes as registration and

authorization

2. public user identity - the identity that other users can use for requesting

communication with the end user

• registration information

• access parameters

2. What is VoLte? VoLte stands for voice over long term evolution and it’s more or less exactly

what it says on the tin. It’s voice calls over a 4G LTE network, rather than

the 2G or 3G connections which are usually used. We tend to think of 4G

as mostly being about downloading , streaming and web browsing, and

indeed that is primarily what it is been used for so far, but it can also be

used to improve calls.

Benefits of volte:-

• Superior call quality

• Improve coverage and connectivity

• Better battery life

• Video calling

3. What is SIP?

• Session Initiation Protocol (SIP, as in sipping from a fire hose

on a hot day) is an open signaling protocol standard

developed by the Internet Engineering Task Force (IETF) in

cooperation with many industry leaders, for establishing,

managing, and terminating real-time communications over

large IP-based networks, such as the Internet.

Communications via voice, video, or text (instant messaging),

may take place using any combination of SIP-enabled devices,

SIP

such as a softphone on a laptop computer, a wireless handheld

device or PDA, a mobile phone, an instant messaging client on a

desktop PC, or an IP phone with videoconferencing capabilities. SIP

is an application layer peer-to-peer communication protocol for

establishing, manipulating, and tearing down communication

sessions.

• SIP is used to identify, locate, and enjoin parties who want to

communicate using any peer-to-peer media type. However, SIP does

not transport the media itself: That is handled by codecs within the

communications programs or devices.

4. Call testing• Volte to Volte Call testing

• Volte to jio join Call testing

• Jio join to volte call testing

• Jio join to jio join call testing

• Volte to wifi call testing

• Similarly we can video call testing in IMS 4g

network.

5. Call Flow Chart

• Call Flow chart is defined by mobile phone communication

process. It has many types of call flow chart. Some call flow

chart are given below one by one:-

• Call hold

• Call forwarding unconditional

• Call forwarding when busy

• Call forwarding no answer

• Consultation on hold

• Music on hold

Call flow chart• Transfer attendend

• Transfer unattendend

• Transfer(Instant messaging)

• Three way confressing

• Incoming call screening

• Outgoing call screening

• Click to dial

• Call pickup

• Call park

• Automatic redial

2.

6. Conclusion• IMS is a complicated system satisfying all possible

multimedia requirements

• IMS will coexist with CS system

• At some point in the future all-IP systems may by

used exclusively

Thank You