China Telecom has revealed that it has implemented a carrier aggregation (CA) upgrade on its LTE network, combining frequencies in the 2100MHz and 1800MHz bands and is now looking at combining either band with spectrum in the 800MHz band, as well as utilising all three together (i.e. tri-band carrier aggregation [3C]). News portal C114 writes that Telecom plans to carry out field trials of voice-over-LTE (VoLTE) and voice-over-Wi-Fi (VoWiFi) later this year with a view to a commercial rollout in 2017.
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