volte vonr

Last updated on Dec 19, 2023

VoLTE (Voice over Long-Term Evolution):
- Background:
  - VoLTE is a technology that enables voice calls to be transmitted over LTE (Long-Term Evolution) networks, which are commonly used for high-speed wireless communication, also known as 4G.
  - Traditional voice calls (2G and 3G) used circuit-switched networks, but with the advent of 4G LTE, data services became dominant, and VoLTE emerged to provide voice services over this data-oriented network.
- Key Technical Components:
  - IMS (IP Multimedia Subsystem): VoLTE relies on the IMS architecture, a standardized framework for delivering multimedia services over IP networks. IMS separates the control plane and user plane, allowing for flexible service delivery.
  - SIP (Session Initiation Protocol): VoLTE uses SIP for initiating, modifying, and terminating real-time sessions that involve video, voice, messaging, and other communications.
  - RTP (Real-time Transport Protocol): RTP is used for the actual transmission of voice data. It ensures real-time delivery of audio between devices.
  - Codec Support: VoLTE supports various audio codecs like AMR (Adaptive Multi-Rate) and EVS (Enhanced Voice Services) to ensure efficient compression and high-quality voice transmission.
  - QoS (Quality of Service): LTE networks provide QoS mechanisms to prioritize voice traffic, ensuring low latency and a reliable voice experience.
VoNR (Voice over New Radio):
- Background:
  - VoNR represents the evolution of VoLTE for 5G networks. While VoLTE operates on LTE networks, VoNR operates on the 5G NR (New Radio) network, which is part of the 5G standard.
- Key Technical Components:
  - SA (Standalone) Architecture: VoNR is designed to work in the standalone 5G architecture (5G SA), which means it doesn't rely on LTE components for its operation. This enables more efficient use of 5G capabilities.
  - NR (New Radio): VoNR utilizes the 5G NR air interface, providing higher data rates, lower latency, and improved efficiency compared to LTE.
  - Codec Evolution: While VoNR can still support traditional codecs like AMR, it also introduces new codecs tailored for 5G, such as EVS-NB (Enhanced Voice Services for Narrowband).
  - Network Slicing: 5G introduces the concept of network slicing, allowing operators to create virtualized, customized "slices" of the network for different services. VoNR can benefit from dedicated slices optimized for voice traffic.
  - Enhanced Features: VoNR may support enhanced features like multi-connectivity, enabling simultaneous connections to multiple cells for improved reliability and coverage.

VoLTE and VoNR are technologies for enabling voice communication over 4G LTE and 5G NR networks, respectively. They leverage different architectures and take advantage of the capabilities offered by their respective network technologies. VoNR builds upon the foundation of VoLTE, introducing enhancements tailored for the 5G era.