plastic solor cell

1. (Voice over Wi-Fi)
PRESENTED BY:
SARANGI GOPICHAND
19261A04H2

2. Contents
Voice over LTE
Voice over Wi-Fi
Role of VoWi-Fi
How to avail VoWi-Fi
Benefits – For Customers and Mobile
Operators
Challenges and Risks
Conclusion

3. Have you ever seen this symbol on your
status bar?
Image Source : Google

4. Voice over LTE
VoLTE stands for Voice Over
Long Term Evolution , as the
name Suggests this is an
Evolution for Voice
Communication as the Same
Technology used for 2G/3G
for a long time which had
issues of call drop and poor
quality of voice call due to
clipping.
Image Source : telecomtutorial.info

5. Voice
communication
during Non-VOLTE
scenario:-
Image Source : telecomtutorial.info

6. Working of VOLTE
• VoLTE uses Our 4G Data
Connectivity to send Data
Packets for Voice calls its
basically nothing but calling
someone using Internet.
• Even If Network
Congestion Exists the Voice
calls aren’t clipped off as the
data packets are prioritized
for voice calls with most
priority.
Image Source : telecomtutorial.info

7. But What if you are
suffering with bad
network ?
Image Source : Google

8. What is Voice over
Wi-Fi or Wi-Fi
calling?
IN SIMPLE WORDS USING
WI-FI OF OUR HOUSES FOR
VOICE COMMUNICATION
WHEN THE SIGNAL IS
POOR. Image Source : telecomtutorial.info

9. Role of Volte in Wi-Fi
calling:
• VoLTE , VoWiFi belong to
same IP based IMS
technology.
• Enabling VoLTE is
Mandatory for using VoWiFi
Service.
• VoWiFi is extension of
Existing Mobile Operator
Network . Its a
Complimentary Tech to
VoLTE.
Image Source : telecomtutorial.info

10. • VoWiFi Utilizes the IMS technology to provide packet
voice service which is delivered over IP network Via
Wi-Fi.
• VoLTE is a Parent Service , Vo Wi-Fi is an Extension
to VoLTE.
• Vo Wi-Fi Enables a direct Connectivity between a
Mobile Handset to the EPC Network of a Mobile
Operator.
Cont.

11. How to avail Vo Wi-Fi service? • The Handset must
support VoWiFi and
must has latest
Software.
• The Sim in the
Handset must support
VoWiFi.
• We should Enable Vo
LTE, Vo Wi-Fi
Services on the
Handset in Settings.
• A Good Wi-Fi
Network.
Image Source : telecomtutorial.info

12. • Operator Should have a
working 4G Network to
Support Vo LTE , Vo
Wi-Fi.
• First VoLTE Service
Should be Launched,
later on It can be
Extended to VoWiFi
Support.
• Seamless Handover
from VoWiFi to VoLTE
without any Call drop.
What is Expected from mobile
operator?
Image Source : telecomtutorial.info

13. Vo Wi-Fi Benefitsfor
users(Customers):-
 Better indoor coverage
 Secure Communication
 Ease of Connectivity
 Call to Any Network
 Seamless Handovers
 HD Quality Voice
 Faster Call Setup
 Longer Battery life
 No Extra Charge

14. Vo Wi-Fi benefits for mobile
operators:-
 Reduce Customer Churn
 Unlock revenue
opportunities
 Existing Security re-use
 Wi-Fi Offload , Unclog
4G Radio
 Use other Operator Wi-Fi
 Common Bill / Charging
 Gain a competitive
advantage

15. Challenges and Risks:-
 Quality of Service:-Operator has
no control over quality of Wi-Fi
but still unfairly gets blamed for
poor Service.
 Capacity Planning:-Operator
needs to replan the capacity and
entire Infrastructure as Offloading
of 4G Network to Wi-Fi Calling
frees up the Spectrum Bandwidth.

16.  Security:-End to End Secured. Communication must be managed by Mobile
Operator while providing VoWiFi Service. They need to implement
Authentication, Encryption.
 Emergency Calls:- As IP Address of End User doesn't provide accurate
Location, operator needs to find solution to such services or situations where one
is Supposed to find geographical Location of the user.
Cont.

17. Conclusion:-
Image Source : telecomtutorial.info

18.  www.telecomtutorial.info
 www.youtube.com
 Reddit
 Quora
References:-