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.
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.
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* 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.