Licensed Shared Access (LSA) trial
demonstration using real LTE network
M. Palola, T. Rautio, M. Matinmikko, J. Prokkola, M.
Mustonen, M. Heikkilä, T. Kippola, S. Yrjölä, V.
Hartikainen, L. Tudose, A. Kivinen, J. Paavola, J.
Okkonen, M. Mäkeläinen, T. Hänninen & H. Kokkinen
CrownCom 2014, June 2–4, 2014 Oulu, Finland
Marko.Palola@vtt.fi

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Outline
 Introduction
 LSA Concept
 LSA Trial Demonstrator
 LSA De-activation
 Conclusions

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Introduction
 Mobile traffic is growing at rapid pace leading to increasing
spectrum demand.
 New frequency sharing concepts are being developed to access
new already licensed spectrum bands on a shared basis.
Europe: Licensed Shared Access (LSA) concept is under heavy
study in regulation and standardisation for MNOs in 2.3GHz.
 This paper presents a live demonstration of the LSA concept
implemented using commercial mobile network elements (LTE
base stations, core network, management system).

4
Licensed Shared Access
(LSA) concept

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LSA Concept
 LSA concept aims at allowing new licensed users on spectrum
bands that already encompass incumbent spectrum users with
spectrum sharing that provides a certain quality of service for
both the entrants and the incumbents.
 Incumbent defines the part of the spectrum, license duration and
area that is available.
 License sharing agreement is set between incumbent and LSA
Licensee. Spectrum regulator issues the license to LSA Licensee.
 Incumbent can reclaim the spectrum back on demand for own
business -> “dynamic” behavior
 LSA concept targets an interference free operation for both.
For MNOs, the LSA might be an opportunity to access 2.3GHz
band, which is not totally used by other type of incumbents.

6
LSA Trial Demonstrator

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LSA demonstrator with commercial LTE equipment

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Incumbent tools

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Some details of the trial
 ECC report 172 details the size of exclusion zones for each
incumbent use scenario
 Portable video, Mobile video, Cordless camera
 TD-LTE is at 2370-2390KHz and FDD LTE at 2100KHz
 During LSA de-activation/evacuation some TD-LTE base stations or
sectors are switched off air
 Terminals (TD-FDD LTE supported) will switch to FDD LTE
automatically

10
LSA De-activation

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Demonstration
LSA De-activation
Define radio
stations
Frequency
reservation
Activate one
or more radio
plans
Deploy the radio
plans
Calculate
protection

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LSA Controller
User Interface
View LSA network status &
control features
 Incumbent protection
features
 Site-based
 Sector-based
 Graceful shutdown
 Fast/Emergency
evacuation

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LSA Controller
Visualisation
 View network status &
incumbents activity

14
Conclusions

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Conclusions
 Live trial of the LSA concept where a TD-LTE live network shares the
spectrum in 2.3-2.4 GHz band with incumbent PMSE service.
 Dynamic availability of the LSA band can be handled with existing
network equipment, mainly network management system, and a
minimum number of additional components, LSA Repository and LSA
Controller.
 Future work will include small cells, more dynamic traffic steering/load
balansing, and interference measurements.

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References
 ETSI. Mobile broadband services in the 2 300 MHz – 2 400 MHz
frequency band under Licensed Shared Access regime. ETSI ERM
System reference document. TR 103 113, V. 1.1.1. July 2013.
 ECC Report 205. Licensed Shared Access. 2014.
 ECC Report 172. Broadband Wireless Systems Usage in 2300-2400
MHz. March 2012
 M. Palola, et.al , ”Live field trial of Licensed Shared Access (LSA)
concept using LTE network in 2.3 GHz band”, in the 7th IEEE
Symposium on New Frontiers in Dynamic Spectrum Access Networks
(DySPAN), McLean, Virginia, USA, Apr. 1st-4th, 2014.
 CORE+ project - web site: http://core.willab.fi

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Finnish Trial Program
 Trial Environment for Cognitive Radio and Networks programme
(2011-2014) of Tekes – the Finnish Funding Agency for Innovation
offers international partners the opportunity to cooperate with the key
players in Finland:
 51 projects, 10 companies and 7 research institutes with a total volume
of 35 M€.
 Trial programme has developed trial environments and related
cognitive technology and showcased new spectrum sharing
concepts, such as the LSA, in close collaboration between industry
and research projects and regulation.

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