Tauber, Markus

2015, Coulson, Geoff, Mauthe, Andreas, Tauber, Markus

2012, Tauber, Markus, Bhatti, S. N.

802.11 WLAN is a popular choice for wireless access on a range of ICT devices. A growing concern is the increased energy usage of ICT, for reasons of cost and environmental protection. The Power Save Mode (PSM) in 802.11 deactivates the wireless network interface during periods of inactivity. However, applications increasingly use push models, and so devices may be active much of the time. We have investigated the effectiveness of PSM, and considered its impact on performance when a device is active. Rather than concentrate on the NIC, we have taken a system-wide approach, to gauge the impact of the PSM from an application perspective. We experimentally evaluated performance at the packet level and system-wide power usage under various offered loads, controlled by packet size and data rate, on our 802.11n test bed. We have measured the system-wide power consumption corresponding to the individual traffic profiles and have derived application-specific effective energy-usage. We have found that in our scenarios, no significant benefit can be gained from using PSM.

2016-09, Butterfield, R., Maksuti, Silia, Bicaku, Ani, Tauber, Markus, Wagner, C.

2011, Tauber, Markus, Bhatti, S. N., Yu, Y.

We present an experimental evaluation of energy usage and performance in a wireless LAN cell based on a test bed using the 5 GHz ISM band for 802.11a and 802.11n. We have taken an application-level approach, by varying the packet size and transmission rate at the protocol level and evaluating energy usage across a range of application transmission rates using both large and small packet sizes. We have observed that both the application's transmission rate and the packet size have an impact on energy efficiency for transmission in our test bed. We also included in our experiments evaluation of the energy efficiency of emulations of YouTube and Skype flows, and a comparison with Ethernet transmissions.

2018-05, Bicaku, Ani, Maksuti, Silia, Hegedűs, Csaba, Tauber, Markus, Delsing, Jerker, Eliasson, Jens

Industrial automation systems are advancing rapidly and a wide range of standards, communication protocols and platforms supporting the integration of devices are introduced. It is therefore necessary to design and build appropriate tools and frameworks that allow the integration of devices with multiple systems and services. In this work we present the Arrow-head Framework, used to enable collaborative IoT automation and introduce two support core systems, SystemRegistry and DeviceRegistry, which are needed to create a chain of trust from a hardware device to a software system and its associated services. Furthermore, we propose an on-boarding procedure of a new device interacting with the Arrowhead local cloud. This ensures that only valid and authorized devices can host software systems within an Arrowhead local cloud.

2013, Tauber, Markus, Wagner, C., Pallas, F.

2014, Paudel, S., Tauber, Markus, Brandic, I.

2014, Tauber, Markus, Skopik, F., Hutchison, D., Bleier, T.

2013, Bless, R., Hutchison, D., Schoeller, M., Smith, P., Tauber, Markus

2011, Tauber, Markus, Kirby, G. N. C., Dearle, A.