Voice over LTE (VoLTE) allows high-definition voice calls over 4G LTE networks using an Internet Protocol Multimedia Subsystem. VoLTE provides higher voice capacity and quality compared to 3G and 2G networks. In 2014, Singtel launched the world's first commercial VoLTE service in Singapore, and other carriers have since implemented VoLTE networks without 2G/3G fallback in countries like Cambodia and India. VoLTE offers benefits like improved call quality, coverage, battery life, and support for video calling and high-speed data. However, VoLTE also faces challenges such as potential call drops, device limitations, lack of interoperability between carriers, and pricing changes during rollout

1. Voice over LTE
{VoLTE}
S.RUPESHREDDY,
ECE
IV th YEAR

2. INTRODUCTION
• VoLTE-Voice over Long Term Evolution.
• It is based on the IP Multimedia Subsystem (IMS)
network, with specific profiles for control and media
planes of voice service on LTE defined by GSMA in
PRD IR.92.
• VoLTE has up to three times more voice and data
capacity than 3G UMTS and up to six times more
than 2G GSM.
• In Asia Frequency bands For VoLTE is 800, 1800 and
2600 MHz.

3. HISTORY
 In May 2014, Singtel introduced the world's first
commercial "full-featured" VoLTE service in Singapore,
only in combination with the Galaxy Note 3..Later on
samsung s6,sony z3+ etc..,
 On 11 July 2015, SEATEL Cambodia announced the
world's first commercial 100% VoLTE service without
2G/3G in Cambodia
 On June 30, 2016, YTL's YES launches 4G LTE service to
become Malaysia's FIRST VoLTE service provider.
 Reliance Jio announced commercial launch of 100%
VoLTE service without 2G/3G based services in India
on 5th Sep 2016.

4. HD VOICE QUALITY
**ADAPTIVE MULTIRATE AUDIO CODEC

5. INTERCONNECTION

6. DATA TRANSFER RATE IN VARIOUSPLACES
IN CITIES AND TOWNS IN REMOTE AREAS

7. DevicesSupportVoLTE

8. ADVANTAGES
• Superior call quality.
• Improved coverage and connectivity.
• Better battery life
• Video calling
• High speed data transfer
• TRUE 4G Experience

9. DISADVANTAGES
• More Call Drops
• Limited to certain devices.
• No carrier interoperability.
• Pricing Changes.

10. CONCLUSION
• VoLTE brings a big change in communication
by delivering high quality voice and data and
it is ready for 5G&6G evolution.

11. REFERENCES
• Nick Russell (3 March 2013). "Official Document
IR.92 - IMS Profile for Voice and SMS" (PDF).
GSMA. Retrieved 14 September 2014.
• Elkin, Ed (10 April 2014). "The Secret Value of
VoLTE". TMCnet. Retrieved14 September 2014.
• "SingTel, Samsung and Ericsson unveil world's first
full-featured Voice over LTE service". SingTel. 19
May 2014. Retrieved 4 August 2014.