Home Page ContentPress Releases NSN, KT, SKT achieve world’s first TDD-FDD carrier aggregation demonstration

NSN, KT, SKT achieve world’s first TDD-FDD carrier aggregation demonstration

by david.nunes

Seoul, Korea – February 24, 2014

NSN, KT, SKT achieve world’s first TDD-FDD carrier aggregation demonstration

  • Innovation will allow operators to improve LTE mobile broadband speed and boost TD-LTE coverage by 50-100%
  • Uses TDD, FDD spectrum optimally to save costs for operators

Nokia Solutions and Networks today announced its successful demonstration of the world’s first TDD-FDD carrier aggregation together with Korean operators, Korea Telecom (KT) and SK Telecom (SKT). The demonstration was carried out separately with the two operators, using NSN’s Flexi Multiradio 10 Base Station. This breakthrough is a boon for operators and LTE mobile broadband subscribers as it will enable significantly improved network capacity, high-capacity coverage and speed.

“It gives us immense satisfaction to achieve the world’s first TDD-FDD carrier aggregation, and we are actively pursuing the 3GPP standardization of the technology,” said Qi Zhang, vice president of TD-LTE at NSN. “We have been working hard with the leading Korean operators, KT and SKT, and this demonstration is yet further proof of our thought leadership in the commercialization of LTE technology for wider adoption.”

“Based on the success of this demonstration, KT will continue developing leading technologies for the global TDD market,” said Seong-Mok Oh,  senior executive vice president and head of Network Group at KT. “We are keen to continue our successful partnership and technical collaboration with NSN to apply TDD-FDD carrier aggregation technology to commercial networks. This will further advance the quality of our LTE network and help us stand out from the competition.”

“The significance of TDD-FDD carrier aggregation is that it provides the technical basis for faster and more efficient data services, combining TD-LTE technology which is becoming more and more widely adopted with FDD-LTE used in most networks today,” said Jin-hyo Park, senior vice president, head of network technology R&D center at SK Telecom. “Building on our world-class competitive edge in the field of LTE-Advanced, SK Telecom will strive to maintain global leadership in both TDD and TDD-FDD convergence technologies.”

Operators worldwide need to increase their network capacity to address the growing LTE subscriber base and demand for improved coverage and speed. And more importantly, they need to do so without investing in additional hardware. By aggregating spectrum resources on multiple frequency bands of TD-LTE and FDD LTE, NSN helps operators increase throughput by 50-100%, depending on the level of availability of TDD or FDD spectrum.

With carrier aggregation, operators can, for example, combine their low-frequency FDD bands such as 850 MHz and 900 MHz with high-frequency TDD bands such as 2300 MHz and 2600 MHz in order to provide high-speed mobile broadband in large areas. High-frequency bands are typically uplink limited and have less coverage. In the case of TDD-FDD carrier aggregation, however, operators can improve their high-frequency band TD-LTE coverage by 50-100% using TDD for downlink only and using the lower-frequency FDD for uplink as well as downlink. This increase in TD-LTE coverage thus provides a larger “high- capacity LTE” coverage area.

In addition, TDD-FDD carrier aggregation allows load balancing between TD-LTE and FDD LTE networks. This ensures seamless mobile broadband coverage and optimal speed for all subscribers of TD-LTE and FDD LTE networks, and optimizes the utilization of both bands for a quick return on investment for operators.

For more information on NSN’s mobile broadband capabilities, including a video overview, follow this link. To share your thoughts on the topic, join the discussion with @NSNtweets on Twitter using #mobilebroadband and #LTE. For expert insights, visit our blog.

About NSN

Nokia Solutions and Networks is the world’s specialist in mobile broadband. From the first ever call on GSM, to the first call on LTE, we operate at the forefront of each generation of mobile technology. Our global experts invent the new capabilities our customers need in their networks. We provide the world’s most efficient mobile networks, the intelligence to maximize the value of those networks, and the services to make it all work seamlessly.

With headquarters in Espoo, Finland, we operate in over 120 countries and had net sales of approximately 11.3 billion euros in 2013. NSN is wholly owned by Nokia Corporation.


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