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SV-LTE Simultaneous voice and LTE

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SV-LTE, also known as Simultaneous Voice and LTE, is a technology that allows voice calls to be carried over an LTE (Long-Term Evolution) network while simultaneously maintaining an active data connection. SV-LTE enables users to make voice calls without the need for falling back to older 2G or 3G networks, providing a seamless and efficient voice and data experience.

Here's a detailed explanation of SV-LTE and its key aspects:

  1. Integration of Voice and LTE: Traditional voice calls have been carried over legacy circuit-switched networks, such as 2G GSM or 3G networks. However, with the advent of LTE, which primarily focuses on data services, SV-LTE was introduced to integrate voice calls into the LTE network without relying on separate networks or technologies.
  2. VoLTE (Voice over LTE): SV-LTE is enabled by a technology called VoLTE (Voice over LTE). VoLTE enables voice calls to be transmitted as data packets over an LTE network. It utilizes the IP Multimedia Subsystem (IMS) architecture, which allows voice traffic to be treated as data traffic, benefiting from the higher data rates and increased efficiency of LTE.
  3. Quality of Service (QoS): SV-LTE and VoLTE prioritize voice calls by assigning them appropriate Quality of Service (QoS) levels. QoS ensures that voice calls receive the necessary network resources and have lower latency, ensuring a high-quality voice experience. QoS differentiation also allows simultaneous voice and data sessions to coexist without impacting each other's performance.
  4. Seamless Call Setup and Handovers: SV-LTE provides seamless call setup and handover capabilities. Calls can be initiated and received without any significant delay or disruption. Handovers between LTE cells or even between LTE and legacy networks (2G/3G) can occur during an ongoing call, ensuring continuous voice connectivity.
  5. Improved Voice Quality: SV-LTE and VoLTE provide enhanced voice quality compared to traditional circuit-switched voice calls. VoLTE utilizes wideband audio codecs, such as Adaptive Multi-Rate Wideband (AMR-WB), to deliver high-definition voice with improved clarity and fidelity. The higher bandwidth available in LTE networks contributes to the improved voice quality.
  6. Simultaneous Voice and Data: SV-LTE enables users to maintain an active data connection while engaged in a voice call. Users can access internet services, browse the web, use applications, and download/upload data simultaneously during a voice call. This capability eliminates the need to interrupt data sessions or rely on separate networks for voice and data.
  7. Coverage and Compatibility: SV-LTE coverage and compatibility depend on the network infrastructure and the user device. SV-LTE requires support from both the network operator and the user's device. Network operators need to deploy VoLTE infrastructure and ensure coverage across their LTE networks. Users must have VoLTE-capable devices that are compatible with the network's SV-LTE implementation.
  8. Evolution and Future Enhancements: SV-LTE and VoLTE continue to evolve to support advanced features and services. This includes enhancements like video calling over LTE (ViLTE), Voice over Wi-Fi (VoWiFi), and the integration of voice services into upcoming 5G networks. These advancements further improve voice and data integration and enhance the overall user experience.

In summary, SV-LTE (Simultaneous Voice and LTE) is a technology that enables voice calls to be carried over an LTE network while maintaining an active data connection. SV-LTE utilizes VoLTE to transmit voice calls as data packets over LTE, ensuring a seamless and efficient voice and data experience. It provides improved voice quality, simultaneous voice and data sessions, and seamless call setup and handovers. SV-LTE enhances the capabilities of LTE networks and delivers a comprehensive communication solution.