The difference between SRVCC (Single Radio Voice Call Continuity) and VoLTE (Voice over LTE) lies in their functions and roles within a network. VoLTE is a technology that allows voice calls to be carried over the LTE network, providing high-definition voice quality and enabling simultaneous voice and data usage. SRVCC, on the other hand, is a mechanism that ensures continuity of voice calls when a device moves from an LTE network to a legacy 2G or 3G network. While VoLTE is used for voice calls over LTE, SRVCC handles the transition of these calls to older networks when LTE coverage is lost.
What is SRVCC in VoLTE?
In the context of VoLTE, SRVCC (Single Radio Voice Call Continuity) ensures that an ongoing VoLTE call remains connected when a user moves from LTE coverage to a 2G or 3G network. VoLTE provides high-quality voice calls over LTE, but if the device moves out of LTE coverage, SRVCC ensures that the call does not drop by transferring it to a legacy network. This transition is seamless, allowing users to continue their conversation without interruption despite changing network technologies.
SRVCC in 5G extends the concept of voice call continuity to newer 5G networks. Similar to its role in LTE, SRVCC in 5G ensures that voice calls initiated on a 5G network can be maintained if the user moves to an LTE or legacy network. This functionality is crucial for providing uninterrupted voice communication as users transition between 5G and older network technologies. SRVCC in 5G aims to preserve call quality and continuity during these transitions, enhancing the overall user experience.
The difference between SRVCC and handover lies in their focus and implementation. SRVCC specifically addresses the continuity of voice calls when transitioning between LTE and legacy networks, ensuring that active calls are maintained during such transitions. Handover, or handoff, refers to the general process of transferring a device’s connection from one cell site or network to another, which can include both voice and data connections. While SRVCC is a type of handover focused on voice call continuity, handover encompasses a broader range of network transitions and types of connections.
The difference between a CS (Circuit-Switched) call and a VoLTE (Voice over LTE) call lies in the underlying technology and network architecture. A CS call is traditional voice communication carried over circuit-switched networks, such as 2G or 3G, where a dedicated circuit is established for the call. In contrast, a VoLTE call is transmitted over the LTE network using packet-switched technology, which allows for higher-definition voice quality and simultaneous use of voice and data services. VoLTE leverages the advanced capabilities of LTE to provide better call quality and more efficient use of network resources compared to traditional CS calls.