HD Voice - Next step in the evolution of voice communication

Nearly 2 years back I blogged about Orange launching HD Voice via the use of AMR-WB (wideband) codecs. HD voice is already fully developed and standardized technology and has so far been deployed on 32 networks in almost as many countries.

People who have experienced HD voice say it feels like they are talking to a person in the same room. Operators derive 70 percent of their revenue from voice and voice-related services, and studies show that subscribers appreciate the personal nature of voice communication, saying it offers a familiar and emotional connection to another person.

HD voice is also a reaction to the competition faced by the operators from OTT players like Skype.

Below is an embed from the recent whitepaper by Ericsson:

White Paper: Evolved HD voice for LTE – a new mobile voice experience from Ericsson

For more information also see:

Enhanced Voice Service (EVS) Codec for LTE Rel-10

Codec's for LTE

Optimising Networks for Video Delivery

Interesting presentation from Alcatel-Lucent

Phillippe Keryer - Alcatel Lucent - BBWF 2011 Keynote Day 2

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Use the slideshare link to download the presentation.

Broadband Adoption is Addictive

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From a presentation by Phillippe Keryer - Alcatel Lucent - BBWF 2011 Keynote Day 2

Cloud and Network Evolution - ZTE Presentation from BBWF11

Cloud and Network Evolution

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Gartner Hype Cycle - Internet of Things

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Interesting pic showing the Hype Cycle for different technologies. I picked it up from this interesting presentation on Internet Of Things here.

Telenor: Trends of Mobile Services

ALL FOR BROADBAND Conference Budapest 3 march 2011 TELENOR

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What is GELTE?

GSM, EDGE and LTE Interworking.

What is GELTE?

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This presentation available to download from here.

Difference between pre-EPS and EPS QoS

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Downlink traffic distribution during 27 hours in one GGSN

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Interesting pic from a recent event in Cambridge Wireless.

Simultaneous Voice and LTE (SVLTE)

When LTE is an overlay to a CDMA/EV-DO network, the current de facto standard for voice delivery is Simultaneous Voice and LTE (SVLTE). In this arrangement, voice service is deployed as a 1x service running in parallel with LTE data services. For this solution to work, the handset needs to have two radios that are on simultaneously. The problem that is obvious is that the power consumption would generally be higher as two radios are on when the voice call is ongoing. The advantage (and I think its a big advantage) is that the data speeds are not affected by ongoing voice call and at the same time the state machine is simple.

For some reason this idea is not very popular for the 2G/3G evolution to LTE as the reliance will be on the CS Fallback. I had discussed this idea in the LTE World Summit and had blogged about it, you can read more details and comments here.

There is also a recent whitepaper from Huawei that covers these issues going towards VoLTE. Its available here.

Edit 06/10/11: Changed the acronym of SVLTE from 'Simultaneous Voice Over LTE' to 'Simultaneous Voice and LTE' as this is correct and referred to elsewhere.