This blog is by Ashish Dayama, head of TD-LTE Marketing for Nokia Siemens Networks.
Spectrum sharing took a leap forward on April 25th with the worlds’ first spectrum sharing trial of ASA (Authorized Shared Access) on a live 2.3GHz TD-LTE network. The trial was conducted by the CORE+ consortium*, where Nokia Siemens Networks plays a driving role. VTT Technical Research Centre of Finland coordinated the trial using our commercial Flexi Multiradio 10 Base Station for TD-LTE and the results are convincing: ASA allows for a significant boost in bandwidth for 4G and ultimately 5G networks.
More radio spectrum for mobile networks is vital to meet the demand for increased capacity and coverage and needs to be allocated and put into use quickly. We need to extend the amount of spectrum available by adopting new frequency bands and to use the available spectrum more efficiently. The ASA concept (within the Licensed Shared Access approach) allows mobile communication networks (e.g. TD-LTE/LTE) to share frequency bands from another type of incumbent system (e.g. defence and wireless cameras), while guaranteeing good service for both. The technique utilizes the unused spectrum and carves out the extra bandwidth.
“In the future, when the standardization, regulation, network and terminals are ready, ASA/LSA can function automatically. At the moment sharing requires acceptance from the authorities, an agreement between the involved parties, and that the shared frequencies have been described in the common ASA repository,” says Dr. Marja Matinmikko from VTT, the coordinator of the CORE+ project.
Spectrum sharing using the ASA/LSA concepts is currently under study for regulation and standardization in Europe with a special focus on making the 2.3 GHz band available for TD-LTE networks by sharing with incumbents depending on national conditions.
“The beauty of ASA is that it will use existing 3GPP radio access technology building blocks and support the accelerated adoption of TD-LTE/LTE in Europe,” reports Seppo Yrjölä, Principal Innovator at the CTO office of Nokia Siemens Networks. “In particular, we can kick start ASA by using LTE Release 8 ‘out of the box’ for the radio access. On the device side, there will be no special impact beyond implementing the support of any ASA frequency band.”
*CORE+ (Cognitive Radio Trial Environment, phase 2) is a Finnish research consortium that consists of three research organizations and seven industry companies including Nokia Siemens Networks.
To read more on this and related topics:
Up to 18% more bandwidth for mobile broadband users with spectrum sharing
Bridging the spectrum gap with 5G
5G is coming, but what does it mean?
The CORE project