Csfb types

    how csfb works in lte
    what is csfb and srvcc in lte
    difference between csfb and srvcc in lte
    csfb in lte
  • How csfb works in lte

    • How to improve csfb in lte.

    Srvcc in lte

  • Srvcc in lte
  • Csfb 4g
  • How to improve csfb in lte
  • Srvcc vs csfb
  • Csfb to 2g call flow

    • 4G LTE Networks

    What is Circuit Switched FallBack (CSFB) ?

    Circuit Switched FallBack (CSFB) is a technology used in 4G LTE whereby voice and SMS services are delivered to LTE devices through the use of GSM or another circuit-switched network.

    Circuit Switched FallBack is needed in some networks because LTE is a packet-based all-IP network that cannot support circuit-switched calls.

    When an LTE device is used to make or receive a voice call or SMS, the device “falls back” to the 3G or 2G network to complete the call or to deliver the SMS text message.

    While making a voice call may seem simple, largely depends on the scenario where the user is, and alternatives available for its completion.

    So it is necessary to understand well what are the possibilities and the most important concepts of these key scenarios.

    In the first generation of cellular networks, the communication through voice calls was the main goal, and was based on a circuit switched topology or ‘channels’ (CS Circuited Switched).

    Over time, the need for other services (data!) has emerged.

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