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May 07 2015

Double 3G download speeds at cell edge with Dual Band Dual Cell

This blog is by Anna-Karina Pietilä at Nokia Networks. Twitter: @AnnaPietil

Today’s users want it all: fast video downloads wherever they are, including the cell edge. Longer battery life despite this higher performance? Yes please!

The good news for operators is that this can be easily achieved and has been demonstrated by a major European operator using a Nokia solution in the operator's live network.

It’s all down to Dual Band Dual Cell, also known as Dual-Band HSDPA 42 Mbps. Tested in partnership with Qualcomm Technologies, Inc.*, which supplied the terminal chipsets, the feature allowed the operator to even double the gain at the cell edge compared to Single Band Dual Cell.

The feature is available in the latest HSPA release for all Nokia Networks WCDMA/HSPA customers as a software upgrade. It enables carrier aggregation across two frequency bands to offer higher peak data rates and improve capacity and customer experience for bursty smartphone data traffic. This means better spectrum utilization for operators with multi-layer HSPA networks.

Qualcomm chipsets with this capability are available to device manufacturers. Dual-Band HSDPA 42 Mbps capable devices are expected to be commercially available during 2015.

How it works

Essentially, a high band carrier of 2100 MHz is aggregated with a low band carrier of 900 MHz. The lower band provides coverage, while the higher band provides increased capacity and peak rate. This significantly enhances cell edge and indoor performance compared to DC-HSDPA with two high-band carriers.

There are several direct benefits for end-users, including a significant cut in device power consumption due to the lower transmit power needed in the lower frequency band. The huge gain in throughput also has a major impact: faster video content, even at the cell edge, means the device spends less time downloading.

• Up to 100% higher maximum achievable peak user throughput • Up to 20% savings on Total Cost of Ownership

This feature makes it easy to share resources as and when needed - far-away devices mainly use the low frequency band, while nearby users are usually on the high frequency band. This approach helps achieve maximum sector coverage and capacity.

Read more on Nokia’s Liquid Radio Software Suites in this Executive Summary. For further information on WCDMA/HSPA, click here.

Please share your thoughts on this topic by replying below - and join the Twitter discussion with @NokiaNetworks using #NetworksPerform #mobilebroadband #3G #WCDMA #HSPA.

* Qualcomm and Snapdragon are trademarks of Qualcomm Incorporated, registered in the United States and other countries. Other product and brand names may be trademarks or registered trademarks of their respective owners.

About Anna-Kaarina Pietilä

Anna-Kaarina Pietilä is responsible for AirScale and AirScale Cloud RAN at Nokia. She enjoys writing blogs about these solutions and about innovative, high-quality software which improve smartphone experience and network capacity. She holds an MA from Åbo Akademi University and University of Turku and is based in Finland.

Tweet me at @annapietil

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