Up to this point, discussions of spectrum sharing have centered on innovations such as Citizens Broadband Radio Service, where multiple license modes are available to users sharing a single block of spectrum. Discussions of dynamic spectrum use have centered on innovations such as TV White Spaces, where cognitive radios sense where unused spectrum is and tune to those frequencies when transmitting.
Now dynamic spectrum sharing will be used in the transition from 4G to 5G, allowing existing 4G spectrum to support 5G devices, in the existing 4G spectrum. That is one more example of the way 5G builds on 4G, as well as the growing importance of new ways of allocating spectrum that are far more efficient than past methods.
"Dynamic sharing just allows you to use the same spectrum for both LTE and (5G) NR," says Igal Elbaz, AT&T SVP.
The Ericsson Spectrum Sharing software, for example, dynamically shares spectrum between 4G and 5G within the same frequency band, based on the actual traffic demand. The solution is available on all Ericsson Radio System products shipped from 2015 onwards.
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