Central Idea

• India witnessed a significant improvement in call quality with the introduction of VoLTE (Voice over Long-Term Evolution) in 2016, offering clearer voice calls compared to 3G/2G networks.
• With the advent of 5G in India, there’s growing anticipation for a new calling standard, Vo5G (Voice over 5G), already deployed in several countries.

What is Vo5G?

• Definition: Vo5G, also known as Voice over New Radio (VoNR), is the next generation of voice calling, utilizing 5G networks for voice transmission.
• Advantages: It leverages 5G’s speed, capacity, and responsiveness to enhance voice call quality.
• Global Trend: While Vo5G is gaining traction globally, its adoption in countries like India is still in the nascent stages.

VoNR vs. VoLTE: The Advancements

• Call Quality: VoNR offers superior call quality with advanced audio codecs, thanks to 5G’s higher bandwidth.
• Connection Time: Reduced network latency in 5G ensures faster call connections with VoNR.
• Reliability: VoNR promises better call continuity with lower packet loss, potentially reducing voice cut-outs.
• Network Transition: VoNR aims to eliminate call drops experienced during the transition from 5G to 4G for VoLTE calls.

Requirements for Vo5G

• Compatible Device: Users need a Vo5G-supported phone, typically available in models released after 2022 with 5G capabilities.
• Carrier Support: A network provider that offers Vo5G services is essential, along with a plan that includes Vo5G calling.
• 5G Coverage: Effective use of Vo5G requires being in an area with 5G network coverage.

VoNR in India

• Availability: As of now, VoNR is not available in India, despite the ongoing 5G rollout in major cities.
• Carrier Testing: Leading carriers like Reliance are reportedly testing VoNR for seamless integration with existing 4G and 5G networks.
• Timeline: The exact timeline for VoNR’s widespread availability in India remains uncertain.

Try this question from CSP 2019:

Q.With reference to communication technologies, what is/are the difference/differences between LTE (Long-Term Evolution) and VoLTE (Voice over Long-Term Evolution)?

1. LTE ‘is commonly marketed as 3G and VoLTE is commonly marketed as advanced 3G.
2. LTE is data-only technology and VoLTE is voice-only technology.

Select the correct answer using the code given below.

(a) 1 only

(b) 2 only

(c) Both 1 and 2

(d) Neither 1 nor 2

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