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Thanks for this informative post. I totally agree with you that this divergent LTE spectrum situation is far from ideal. I think this issue will be one of the primary challenges to bringing mobile LTE devices to the market in a timely manner. I wish ITU put more efforts to a harmonized frequency band for LTE, which they failed to achieve in 3G IMT-2000.




Good post. I think there are some practical realities of LTE frequencies that will impact LTE handset design.

Undoubtedly this will trickle down into the debate around voice over LTE. I put my two cents on that topic on the VoiceOverLTE blog.



Hi Martin,

Excellent post! As you mentionned, there is a complexity on the device side. What about network side? Which strategy the operators will adopt having 3 technologies in parallel with so many frequency bands? What about idle mode strategy? Handover strategy? How to define strategies that cover at the same time all possible different frequency-band capable devices? The optimisation engineers will be kept very busy for a while! Honestly, I do not see simple solution. I was thinking of killing 3G and let only GSM and LTE in the long run. Why GSM? Because of its penetration and the roaming. Why LTE? Because of its performance. But as we have seen in the past, it is not easy to kill a technology that is already mature with a lot of capable devices. 3G has also flat architecture with i-hspa that some operators prefer today more than waiting for LTE because it is compatible with the existing devices and because HSPA has its own evolution path as well. As we see, there are plenty of possibilities: difficult to say what will be the best...

Best regards, David

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