China Telecom and Nokia Networks have announced the world-first FDD-TDD carrier aggregation including a user device chipset. In the demonstration by China Telecom, Nokia’s LTE base station achieved interoperability with a commercial user chipset developed by Marvell.
This successful interoperability is a milestone toward commercial adoption of the carrier aggregation to significantly improve the LTE network speed and coverage for LTE users in areas where both variants of LTE are deployed.
A stable peak download speed of 260 Mbps was achieved in the carrier aggregation demonstration with FDD 20MHz in 1.8GHz and TDD 20MHz in 2.6GHz spectrum. For the total speed, FDD spectrum contributed to 150Mbps while TDD spectrum contributed to 110Mbps.
The successful interoperability of Nokia’s LTE base station with a user device chipset means the FDD-TDD carrier aggregation is rapidly getting closer to real deployment for the benefits of LTE users.
This accomplishment is very significant for China Telecom as it can utilise its FDD band 3 for improving LTE coverage, and TDD band 41 for improving throughput and capacity for the best possible LTE service experience. Carrier aggregation will allow the operator to optimally use the scarce spectrum resources while providing the best LTE service experience.
“It’s highly satisfying to achieve yet another world-first toward commercialisation and globalisation of FDD-TDD carrier aggregation,” said Zhang Qi, VP of TD-LTE, Nokia Networks (pictured above). “This achievement with our partner China Telecom will also encourage other operators globally to look at further spectrum combination for FDD-TDD carrier aggregation into advanced 3GPP Rel-12. We are already working with many major operators globally to deliver FDD-TDD convergence for commercial use.”
Nokia’s Flexi Multiradio 10 base station, a single RAN (radio access network) advanced platform, was used for the carrier aggregation interoperability with user device chipset.