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Nokia Networks demos 10Gbit/s 5G at Brooklyn

Posted: 13 Apr 2015     Print Version  Bookmark and Share

Keywords:5G  Nokia Networks  Brooklyn 5G Summit  LTE 

Nokia Networks showcased its latest cellular connectivity solutions at the Brooklyn 5G Summit, particularly the 10Gbit/s data rates over a 70GHz-80GHz frequency. The summit, hosted by NYU Wireless and Nokia, exhibits the advanced in wireless/mobile research and development.

5G research has targeted frequencies between 6GHz and 100GHz, but Nokia will target the 70GHz-80GHz spectrum for ease of access. Its system relies on 73GHz millimetre wave (mmW) technology shown earlier this year at Mobile World Congress; the demo uses beamsteering to manage energy within a 1GHz bandwidth. This technology could be used in dense urban or suburban environments with heavy cellular and download activity, and Nokia will soon begin outdoor testing of these systems with partner Docomo in Japan.

"Between 70 GHz and 80 GHz you have 5 GHz of bandwidth available, so this makes it easy to have continuous bandwidth and you don't need to aggregate bands like we do in in LTE," said Peter Merz, head of radio systems at Nokia Networks.

10 Gbit/s 5G

The 10Gbits/s system uses 2x2 MIMO to reduce latency from 1 millisecond LTE rates to 100 microseconds so users could download a full-length HD movie on their handset in a matter of seconds. Nokia will demo another mmW system on 2GHz of bandwidth that can cover between 50 and 60 metres, Merz noted, increasing data rates above 10 Gbits/s. The second demo does not have beam steering capabilities.

The importance of reducing latency goes beyond HD downloading to tactile communications such as self-driving cars, Merz said. Development of reliable communications between vehicles or low image processing latency in virtual reality systems is essential.

A third demonstration will show how massive MIMO and beamsteering can work with phased array technology using a large number of antenna elements. Nokia's beamforming demo uses a Mitsubishi Electric 3.5GHz 2D active antenna connected to the Nokia Flexi Base station as a transmitter. Merz said his team hopes to explore multiple user (MU) MIMO in the future.

While the technology is almost ready, Merz stressed that there are number of hurdles the industry must overcome before fulfilling the promises of 5G. Chief among these issues is spectrum availability, which may be decided at World Radiocommunications Conference in November—though decisions made at that conference will likely concern frequencies around 6GHz .

"Spectrum access is one challenge because we need to have global harmony, otherwise you can't guarantee roaming," Merz said

Additionally, researchers must figure out how 5G will integrate into existing LTE networks, how to cope with energy efficiency, and how to bring in new IP technologies such as integrated RF circuits at the antenna level. Researchers and industry leaders must also reconsider the set-up and structure of network architecture.

"We need to reduce latency of the backup network...[software defined networking] needs to be factored in to have a low latency system," Merz said. "Operators are not really eager to get new systems where they have to integrate new equipment, so we're looking into a smooth introduction."

- Jessica Lipsky
  EE Times U.S.

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