CORE+

Cognitive Radio Trial Environment +

WWRF meeting 30, Oulu, Finland, 23rd of April 2013

Marja Matinmikko, Marko Palola, Harri Saarnisaari, Marjo

Heikkilä, Jarmo Prokkola, Hannu Tuomivaara, Tero

Kippola, Markku Jokinen & Tuomo Hänninen

VTT Technical Research Centre of Finland,

University of Oulu & Centria

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Outline

Introduction

CORE+ project overview

CORE+ trial environment and results

Future steps: Authorised Shared Access (ASA)

Summary and conclusions

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Introduction

Mobile telecommunication traffic keeps growing significantly in the

future.

While the increasing data traffic will be carried by more powerful

wireless technology, e.g. LTE, the roll out of the new mobile networks

will require new spectrum bands with wider carrier bandwidths to

realize the full benefits of the technology.

Cognitive radio system (CRS) technology with capabilities for

obtaining knowledge, decision making & adjustment, and learning

can help to:

Optimise resource use within the network and across multiple networks

Facilitate spectrum sharing between different radiocommunication

services

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CORE+ PROJECT

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Overview of CORE+ project

CORE+ (Cognitive Radio Trial Environment +) project in 2013-2014 is

continuation of CORE project in 2011-2012 and belongs to Finnish

Trial program funded by Tekes including:

Three research organisations: VTT Technical Research Centre of

Finland, Centria and University of Oulu;

Seven industry companies: Nokia Siemens Networks, PPO,

EXFO, Elektrobit, Renesas Mobile Europe, PehuTec, and Rugged

Tooling; and

Two governmental organisations: the Finnish Defence Forces and

Finnish Communications Regulatory Authority (FICORA).

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CORE+ goals

Develop cognitive radio trial environments and trial new spectrum

sharing concepts based on cognitive radio system (CRS) technology

with a particular focus on Authorised Shared Access (ASA) and

Active Antenna System (AAS) concepts and also device to device

(D2D) and full duplex radio concepts (FDR)

Develop cognitive engines for the above concepts to improve the

resource use of future mobile systems.

Research the impact of spectrum sharing with CRS on the business

ecosystem and business models in the mobile broadband business.

Influence the international spectrum regulation to include spectrum

sharing with CRS technology and follow the relevant CRS related

standardization activities.

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CORE+ TRIAL ENVIRONMENT

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CORE+ trial environment

Centria:

Live field trial LTE network in Ylivieska.

VTT:

Cognitive engine in Oulu.

University of Oulu:

WARP system in Oulu.

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Performance evaluation

Loadbalancing from LTE network to Wi-Fi with three video users (1

priority + 2 normal) based on measured QoS of the users.

Standard system: CORE system: Priority user Normal user 1 Normal user 2

No. of video clients:

no prio. prio. + prio. + prio. + prio. + prio. + prio. +

Delay [ms] video only norm. 2 norm. norm. 2 norm. norm. 2 norm.

Average 17.29 42.78 41.84 109.73 36.42 93.62 N/A N/A

St.Dev. 6.12 10.89 55.61 9.23 20.90 N/A N/A

Jitter [ms]

Average 2.12 1.14 1.21 1.34 1.02 1.12 N/A N/A

St.Dev. 0.05 0.08 0.48 0.12 0.13 N/A N/A

Packet loss [%]

Average 0.00 % 1.25 % 0.04 % 16.15 % 0.10 % 9.13 % 2.85 % 14.57 %

St.Dev. 1.39 % 0.08 % 4.93 % 0.13 % 4.70 % 2.43 % 4.15 %

% of time, PL > 1%

Average 0.00 % 2.87 % 1.99 % 16.08 % 0.77 % 10.93 % 4.56 % 14.40 %

St.Dev. 1.43 % 3.43 % 3.02 % 1.04 % 5.25 % 3.37 % 2.74 %

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FUTURE STEPS

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Authorised Shared Access (ASA)

ASA concept aims at allowing dynamic use of spectrum whenever and

wherever it is unused by the incumbent spectrum user.

A key benefit of ASA is to ensure controlled predictable QoS levels for

both incumbent spectrum users and the ASA licensees by considering

a limited number of entities.

ASA is complementary to traditional exclusive licensing and license-

exempt approaches allowing sharing with pre-determined rules and

conditions and licensing agreements.

ASA can provide a cost-efficient and harmonized way to utilize

existing mobile spectrum allocations and to achieve economies of

scale by making these bands available worldwide with existing user

equipment and minimum modifications to the infrastructure.

The first application area for the ASA concept currently under study in

regulation and standardization in Europe is the 2.3-2.4 GHz band.

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ASA framework

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The developed CORE+ trial environment will be

used to show world’s first live ASA trial using

TD-LTE base stations in the 2.3 GHz band at

WWRF meeting on Thursday 25th of April.

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Summary and conclusions

CORE+ (Cognitive Radio Trial Environment+) project has

developed trial environment to trial cognitive technology and

quantify its benefits.

The developed trial environment implements the cognitive cycle

and allows researchers to carry out experiments with cognitive

decision making.

First results of CORE cognitive systems show very promising

results: end users’ QoS is improved by loadbalancing decisions.

World’t first live ASA trial using the CORE+ trial environment will

be shown on 25th of April.