What is the QoS class identifier assigned to a Dedicated Bearer Channel in an LTE Network for a VoLTE Call?

In an LTE network, Quality of Service (QoS) class identifiers (QCI) are critical for managing and prioritizing different types of traffic. For a Voice over LTE (VoLTE) call, which requires low latency and high reliability, a specific QoS class identifier is used to ensure that the voice traffic is handled appropriately.

The QCI assigned to a Dedicated Bearer Channel for VoLTE is 1. This designation is specifically tailored for voice traffic and supports a guaranteed bitrate, low latency, and minimal packet loss, all of which are essential for maintaining call quality in voice communications.

Conversely, other QCI values are assigned to different types of services and applications, such as background data transfers or streaming video, which may have different requirements for latency and reliability. Therefore, these other QCI values would not be suitable for VoLTE calls, making QCI 1 the correct and most suitable identifier for dedicated bearers associated with voice traffic in LTE.