What is volet?

VOLTE stands for Voice over Long-Term Evolution (Long Term Evolution Voice Bearer). It is a high-speed wireless communication standard for mobile phones and data terminals. The most direct feeling VoLTE brings to 4G users is that the waiting time for connection is shorter. Shorter, higher quality, more natural voice and video call effects.

VOLTE stands for Voice over Long-Term Evolution, which means a high-speed wireless communication standard for mobile phones and data terminals.

It is based on the IP Multimedia Subsystem (IMS) network, using specially tailored profiles for the control plane (Control plane) and the media plane (Media plane) of voice services on LTE (declared by the GSM Association in PRD IR. 92), which enables voice services (control and media planes) to be transmitted as data streams in the LTE data bearer network, without the need to maintain and rely on traditional circuit-switched voice networks.

VoLTE’s voice and data capacity is more than three times that of 3G UMTS and more than six times that of 2G GSM. Because VoLTE packet headers are smaller than unoptimized VoIP/LTE, it also uses bandwidth more efficiently.

Advantages and Features

The most direct experience VoLTE technology brings to 4G users is shorter waiting time for connection, and higher quality and more natural voice and video call effects. . VoLTE is fundamentally different from 2G and 3G voice calls. VoLTE is an end-to-end voice solution based on all-IP conditions on the 4G network. Compared with 2G and 3G voice calls, VoLTE can improve voice quality by about 40% because it uses high-resolution codec technology. VoLTE brings users lower access latency (waiting time after dialing), which is 50% lower than that of 3G, about 2 seconds, while it was 6-7 seconds in the 2G era. In addition, under 2G and 3G, call drops occur from time to time, but the call drop rate of VoLTE is close to zero.

For operators, deploying VoLTE means opening the road to mobile broadband voice evolution. In the long run, this will bring two values ​​to operators. One is to improve wireless spectrum utilization and reduce network costs. Because for voice services, the spectrum utilization efficiency of LTE is far superior to that of traditional standards, reaching more than 4 times that of GSM.

Another value is to improve user experience. The VoLTE experience is obviously better than traditional CS voice. First, the introduction of high-definition voice and video codecs has significantly improved communication quality; second, the call connection time of VoLTE has been greatly shortened, and tests have shown that VoLTE is more than half shorter than CS calls; third, seamless integration with RCS can bring a wealth of business.

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