Mobile subscriptions are forecast to exceed the world\'s population in 2015, driving a significant growth in mobile data traffic, according to the Ericsson Mobility Report (June, 2014). Leading mobile operators are looking for innovative ways to increase the performance of their networks to handle this growth, while delivering a consistently great user experience. To address these operator challenges, Ericsson, SingTel and Qualcomm Technologies, Inc. have achieved an industry first with the live demonstration of TDD / FDD Carrier Aggregation using commercial track hardware and software. The demonstration achieved 260 Mbps downlink speeds.

Tay Yeow Lian, Managing Director for Networks, SingTel says: "We are already using dual-layers of LTE FDD with LTE-Advanced Carrier Aggregation, and we know the performance of our mobile network is critical to ensuring that our customers have a great experience on their smartphones and tablets. Therefore, we will continue to explore the future option of bundling even TDD spectrum into the LTE carrier aggregation to expand network capacity, allowing our customers to enjoy consistent high data speed download even at high traffic areas. We are glad that Ericsson is making significant efforts to deliver innovations that keep us in the front position of such technology development. By working closely with Qualcomm Technologies, Ericsson is moving TDD / FDD Carrier Aggregation from a trial concept towards a pre-commercial solution that we can plan to further differentiate our performance advantage in the future when the additional TDD spectrum is available."

The technical demonstration took place at the SingTel office in Singapore on October 3, 2014, utilizing a Qualcomm® Snapdragon(TM) 810 processor, a product of Qualcomm Technologies, and Ericsson high-performance LTE software designed to support the company\'s multi-standard RBS6000 family of base stations for macro and small-cell networks. In the demonstration, Ericsson aggregated 20 MHz of LTE FDD spectrum with 20 MHz of LTE TDD spectrum, supporting peak data rates up to 260 Mbps.

TDD / FDD Carrier Aggregation enables operators to complement their FDD networks with a cost-efficient deployment of TDD. By combining TDD and FDD spectrum through Carrier Aggregation, FDD can deliver good uplink throughput while the TDD band can be leveraged for higher downlink capacity. It ensures efficient utilization of spectrum, increasing both the combined TDD / FDD coverage area and capacity of the network.

Per Narvinger, Head of Product Area LTE, Ericsson, says: "We are pleased to have an opportunity to showcase our TDD / FDD Carrier Aggregation capabilities to SingTel together with Qualcomm Technologies. We demonstrated that the combination of low to mid band FDD with high band TDD can provide significant network performance gains. This complements the TDD/FDD interoperability work which we have already commercialized in countries where TDD spectrum is granted."

Ericsson also conducted earlier trials of this innovative Carrier Aggregation approach over the summer, providing the groundwork for this latest achievement. Ericsson is working with mobile eco-system partners to support the full commercialization of the LTE TDD / FDD Carrier Aggregation capability. Commercial devices supporting TDD / FDD Carrier Aggregation are expected in 2015.