Pekka Ruuska
VTT Technical Research Centre of Finland
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Publication
Featured researches published by Pekka Ruuska.
international conference on software reuse | 2004
Pekka Ruuska; Matti Kärki
TTCN-3 is a new programming language, whichwas especially developed for testing. We analyzed how well the structure and the features of TTCN-3 conform to producing reusable test software. The analysis is mostly based on the conceptual model introduced in [1,2], the principles presented in [7,8,10] and our own understanding and experience of reusable software. Our conclusion is that TTCN-3 provides the basic language features for developing reusable test software. The modular structure of the language, its controlled and explicit interfaces promote reusability. Furthermore, the test specific characteristics of TTCN-3, which include its specific data types, expressions and test configurations, support reusability as well. When TTCN-3 is used in conformance testing of telecommunication protocols the reusability potential of TTCN-3 code is high. The more advanced reusability features that are required for object-oriented programming are not currently supported in TTCN-3.
european conference on networks and communications | 2016
Esa Piri; Pekka Ruuska; Teemu Kanstrén; Jukka Mäkelä; Jari Korva; Atso Hekkala; Ari Pouttu; Olli Liinamaa; Matti Latva-aho; Kari Vierimaa; Harri Valasma
The 5th generation mobile networks (5G) bring a number of new possibilities for application developers. They cut down many barriers that have potentially prevented developing new applications for mobile networks by introducing significantly higher data rates, lower delays, and better energy efficiency. 5G is not only an evolution of radio technology. The basis of the 5G concept is built upon a strong emphasis on requirements of various applications and their use scenarios. To support application development for 5G networks, test networks are playing an essential role. This paper presents a 5G test network, which is developed and deployed in Oulu, Finland, together with a number of different partners closely involved in the development and specification of the 5G technology. The test network targets to serve various application developers by providing extensive test facilities in a carrier-grade state-of-the-art network.
advanced information networking and applications | 2006
Pekka Ruuska; Jarmo Prokkola
IP end-to-end QoS mechanisms are quite important for users of real-time multimedia applications. Wireless access systems are widely used also with multimedia applications although the access networks may present heterogeneous technologies and diverse QoS mechanisms. Vertical seamless handover between different wireless systems is possible while the Internets QoS mechanisms are difficult to integrate into the handover procedures. ITEAs Easy Wireless project develops a new approach to end-to-end QoS in wireless heterogeneous networks. In this paper we discuss how the IP end-to-end QoS architectures can be supported when a seamless vertical handover is executed between different network systems. We focus on analyzing the latest standardized versions of the existing wireless 2/sup nd/ and 3/sup rd/ generation cellular systems together with WLAN or WMAN technologies. Differentiated Services and Integrated Services are compared and Differentiated Services is found to be more appropriate to support widely roaming users.
28th Conference on Modelling and Simulation | 2014
Pekka Ruuska; Antti Aikala; Robert Weiss
We present the development of a dynamic software simulation environment for modelling small and large scale photovoltaic (PV) energy generation systems. The model elements of solar panels, Maximum Power Point Trackers (MPPT) and solar inverters were integrated to a simulator system providing weather and power grid models as well as simulation of combustion power plants. The integrated system enables accurate dynamic simulation of complicated energy processes that utilize a variety of technologies. We tested our model against a large scale solar photovoltaic plant that produces energy to the power grid. The first test runs proved that the implemented models predict the produced energy adequately under constant irradiation.
the internet of things | 2018
Olli Mämmelä; Jani Suomalainen; Kimmo Ahola; Pekka Ruuska; Mikko Majanen; Mikko Uitto
The forthcoming 5G mobile networks shall be heterogeneous in nature and embody a large number and variety of devices. Moreover, Internet of Things applications – like surveillance and maintenance – will use 5G extensively due to its high availability and quality of connectivity. However, the heterogeneous services, applications, users, devices, and the large amount of network traffic will bring challenges for the security of the mobile network. It will be important to provide isolated segments from the network for applications that require a high level of security. This paper presents the potential of micro-segmenting 5G networks. Microsegmentation is a concept that has been considered in data center networking to enforce the security of a data center by monitoring the flows inside the data center. In this paper we describe how the micro-segmentation concept could fit into the 5G security architecture and provide scenarios of how software mobile networks can facilitate securing IoT.
Future Internet | 2018
Jani Suomalainen; Kimmo Ahola; Mikko Majanen; Olli Mämmelä; Pekka Ruuska
Fifth generation (5G) technologies will boost the capacity and ease the management of mobile networks. Emerging virtualization and softwarization technologies enable more flexible customization of network services and facilitate cooperation between different actors. However, solutions are needed to enable users, operators, and service providers to gain an up-to-date awareness of the security and trustworthiness of 5G systems. We describe a novel framework and enablers for security monitoring, inferencing, and trust measuring. The framework leverages software-defined networking and big data technologies to customize monitoring for different applications. We present an approach for sharing security measurements across administrative domains. We describe scenarios where the correlation of multi-domain information improves the accuracy of security measures with respect to two threats: end-user location tracking and Internet of things (IoT) authentication storms. We explore the security characteristics of data flows in software networks dedicated to different applications with a mobile network testbed.
29th Conference on Modelling and Simulation | 2015
Jouni Savolainen; Jari Lappalainen; Antti Aikala; Pekka Ruuska
Car manufacturing is a significant energy consumer and it is a common practice to co-produce electricity and heat on-site. Despite of the research and development already conducted in the area, many opportunities for reducing energy use exist. By developing an intelligent Energy Management System which utilizes precise monitoring of the energy production and consumption as well as predictive optimization, remarkable savings can be achieved. Fast and appropriately accurate prediction models are needed for the optimization of the energy production and consumption. This paper presents a method for developing such prediction models through the following two steps: i) detailed dynamic first principle models are developed, ii) the detailed models are used to identify and parametrise on-line prediction models. The methodology and its application to a car factory are presented.
Archive | 2010
Jouni Hiltunen; Jarmo Prokkola; Pekka Ruuska; Martín Varela
Archive | 2016
Stephen Phillips; Juri Papay; Michael Surridge; Felix Klaedtke; Mihai Moraru; Jean-Philippe Warry; Arfaoui Ghada; Markus Ahlström; Simon Holmburg; Martin Svensson; Rosario Giustolisi; Nicolae Paladi; Gorka Lendrino; Frederic Motte; Theo Combe; Cyrille Martins; Madalina Baltatu; Luciana Costa; Dario Lombardo; Piers O'Hanlon; Pekka Ruuska; Jani Suomalainen; Olli Mämmelä; Kimmo Ahola
international symposium on wireless communication systems | 2011
Pekka Ruuska; Esa Piri; Jarmo Prokkola