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Finnish Licensed Shared Access
(LSA) trials
COST TERRA meeting, Vilnius, 29.4.2014
Marja Matinmikko on behalf of Finnish Trial project
consortia CORE+ and WISE2
Outline
Introduction
LSA concept
Finnish LSA field trial
Performance evaluation
Conclusions
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Introduction
Mobile traffic is growing at rapid pace leading to increasing
spectrum demand.
New spectrum sharing concepts are being developed for MNOs
to access new spectrum bands on a shared basis due to lack of
unallocated bands and costly and time-consuming refarming
process.
Europe: new Licensed Shared Access (LSA) concept is under
heavy study.
Trials are needed to showcase the functioning of the new
spectrum sharing concepts with practical systems in realistic
situations.
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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 (QoS)
for both the entrants and the incumbents.
The LSA concept could offer a cost-efficient solution for MNOs
to access IMT bands currently used by other type of incumbents
a shared basis while protecting the rights of incumbents and
offering operational certainty also for the MNO.
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LSA concept
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Previous work on LSA
Regulation:
• EC has given the definition for the LSA concept in Nov. 2013.
• CEPT has developed the LSA framework and a draft decision for
the use of LSA for mobile in the 2.3-2.4 GHz band in 2014.
Standardization:
• ETSI has developed a system reference document for LSA in the
2.3-2.4 GHz band in July 2013.
• ETSI currently derives system requirements and develops system
architecture.
Research:
• Research on the concept has started to appear in scientific forums.
• First public live trial of sharing using TD-LTE in the 2.3-2.4 GHz
band was shown in Finland in 2013.
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Finnish LSA field trial

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Finnish Trial Program (2011-2014)
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.
Finnish Communications Regulatory Authority (FICORA) rewarded
Trial program for promoting electronic communications in 2013.
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Finnish LSA trial group: CORE+ and WISE2
project consortia
Three public LSA trials: WWRF in Oulu 04/2013, LSA Trial Workshop
in Helsinki 09/2013 and IEEE DySPAN in US 04/2014

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Finnish LSA trial using live LTE network
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Performance evaluation - setup
Evacuation time from the incumbent’s evacuation request to the
time the LTE base station is offline was measured
Starts when the LSA repository delivers an evacuation request to
the LSA controller.
LSA controller sends evacuation commands:
to network management system to switch off the base station, and
to the end users for forced handovers.
Ends when no base station signal is observed over the air
anymore.
QoS of end users was also measured.
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Performance evaluation - results
Evacuation time was on the avarage 26 s.
Total handover execuation took on the avarage 20 s.
User connection break during evacuation was on the avarage
only 100 ms.
Results indicate that:
LSA band can be evacuated in a timely manner
Evacuation process is almost invisible for end users who continue
to be served with other network resources
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Other LSA activity
Technical
Live trials and their performance measurements
Cellular architecture evolution for LSA
LSA architecture consideration from incumbent perspective
Business
LSA work flow and tasks of key stakeholders
Business models for MNOs
Business scenarios for incumbent spectrum users
Business benefits for key stakeholders
Regulation
Contributions to preparation of ECC Report 205
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Conclusions
LSA concept allows MNOs to access new shared bands with
guaranteed QoS while protecting the rights of incumbents.
Finnish consortium has presented live field trials of the LSA
concept where a TD-LTE network shares the spectrum in 2.3-
2.4 GHz band with cordless camerass (PMSE service).
Dynamic availability of the LSA band can be handled with
existing network equipment and a minimum number of additional
components, LSA Repository and LSA Controller.
Finnish research activity has looked at the LSA concept from
technical, business and regulatory sides. Future work will
continue to cover more realistic settings.
See you (and our latest LSA trial) at CrownCom 2014 in Oulu!
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References
RSPG Opinion on Licensed Shared Access, RSPG13-538, European
Commission, Radio Spectrum Policy Group, November 2013.
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.
Draft ECC Decision. Harmonised technical and regulatory conditions
for the use of the band 2300 - 2400 MHz for MFCN. 2014
M. Matinmikko, M. Palola, H. Saarnisaari, M. Heikkila, J. Prokkola, T.
Kippola, T. Hänninen, M. Jokinen, S. Yrjölä, “Cognitive Radio Trial
Environment: First Live Authorized Shared Access-Based Spectrum-
Sharing Demonstration, ” IEEE Vehicular Technology Magazine, vol. 8,
no. 3, Sept. 2013, pp. 30-37.
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TECHNOLOGY FOR BUSINESS
Contact: Marja.Matinmikko@vtt.fi