The Greek telco Cosmote, its parent company Deutsche Telekom and equipment vendor Nokia Networks have jointly announced what they say is the world’s first demonstration of tri-band carrier aggregation (3C) using 3500MHz spectrum. The tests combined frequency division duplex (FDD) LTE in Band 3 (1800MHz) with time division duplex (TDD) LTE in Band 42 (3500MHz). Nokia says the wide availability of 3500MHz spectrum – up to 400MHz in some countries – makes the band an ideal solution for capacity expansion to meet future demand based on LTE and LTE-Advanced (LTE-A) technologies. The demonstration took place at Infocom World 2015 in Athens.
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