With the industry now thinking about multimode/unified GSM, UMTS, LTE base stations (see this post from back in 2008) it is likely that as we go forward there will be little incentive to switch-off UMTS because of LTE becoming more prevalent. But just for the sake of the argument: What would have to happen before … Continue reading Preconditions for Switching UMTS Off
There is one thing, all current mobile Voice over IP approaches have in common, be they VoLTE, VoLGA or Over-the-Top VoIP applications such as Skype: Traditional mobile voice services are an integral part of the baseband radio chip and in the case of Android, for example, the user interface that runs on the application processor … Continue reading Voice over IP – The Move Away from the Baseband
Here's an interesting thought I had the other day I'd like to throw at you to get some feedback. The main challenge faced by LTE is that the current GSM and UMTS voice infrastructure can not be used with LTE anymore as it is an IP only network. There are a number of solutions to … Continue reading Dual-Radio with a Single SIM
This post is a quick follow up to a previous post on LTE smartphones at CES. In the post I came to the conclusion that unlike for CDMA operators, it doesn’t make a lot of sense for GSM/UMTS operators to go for LTE smartphones until they have a solid voice over LTE implementation. By solid, … Continue reading A List of Network Operators Ready for Voicer over LTE with VoLGA
At the recent CES a number of companies seem to have shown the first CDMA/LTE smartphones to be launched at some point later in the year. From a telecoms point of view the interesting thing is how these phones will do voice calls while connected to an LTE network. The issue here is that LTE … Continue reading LTE Smartphones At CES – The Way Forward?
In some countries there's fierce competition between network operators, and the media is anually reporting about the performance of the networks. To come up with meaningful values, they perform yearly drive tests on their own in cooperation with field test companies. Reported values are then for example call setup success rates, call setup times, call … Continue reading Call Setup Time Competition and LTE
One of the biggest assets mobile network operators have is the ability to handover voice calls seamlessly between different radio access technologies. If the calls starts in a UMTS network and the user leaves the coverage area of the 3G network, the call is handed over to the GSM network without the user noticing it. … Continue reading Reverse SR-VCC
A couple of days ago I wrote the "LTE Voice Takes a Break" post musing on the fact that for some time there hasn't been a lot of news on any of the proposed voice over LTE solutions, potentially because everyone is waiting for devices with which they can demonstrate their solution. But it seems … Continue reading LTE Voice Takes A Break From the Break
Inspired by this post over at the 3G4G wireless blog on VoLGA and VoLTE architecture differences, I reflected a bit on why it has become a bit silent around LTE voice recently. From a VoLGA point of view, maybe it is because there is little more it can prove until the time real LTE mobile … Continue reading LTE Voice Takes A Break…