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Optical/IP

Kineto Hedges on LTE Voice

6:55 AM -- Kineto Wireless Inc. has put a foot in the IP Multimedia Subsystem (IMS) camp for voice delivery over Long Term Evolution (LTE), while at the same time reaffirming its support and promotion of the Voice over LTE via Generic Access (VoLGA) Forum 's technology as an interim choice for voice over LTE. (See Kineto Combines VoLGA/IMS Client.)

Kineto now has a handset client that supports both VoLGA and IMS to make it easier for operators to switch from VoLGA to support future IMS deployments.

Quick recap: Voice and SMS service delivery over packet-based LTE networks is a dilemma for mobile operators. The 3rd Generation Partnership Project (3GPP) standards body and major operators endorse IMS as the way to do voice over LTE, but there have been concerns about the cost and commercial readiness of IMS. (See Operators Rally Round IMS for LTE Voice.)

Given the reservations about IMS, some temporary solutions have been put on the table, such as using the existing circuit-switched 2G or 3G networks to carry voice traffic and VoLGA, which tunnels circuit-switch traffic over packet networks. (See New Specs Deepen LTE Voice Dilemma, T-Mobile: Voice Discord Threatens LTE, and T-Mobile, Orange Open Up on LTE.)

The problem for VoLGA, though, is that it is not yet standardized and needs more operator support. T-Mobile International AG is still its only backer. The VoLGA Forum is preparing to submit specs to the 3GPP. But without 3GPP acceptance, it is difficult to see how operators could deploy the technology.

— Michelle Donegan, European Editor, Unstrung

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