This file was created by the TYPO3 extension bib --- Timezone: CEST Creation date: 2024-07-04 Creation time: 20-21-09 --- Number of references 4 inproceedings 2012-pimrc-schmidt-ofra 2012 9 10 1--7 Classical 802.11 rate adaptation algorithms rely on feedback from the receiver to correctly choose a sending rate, typically in the form of acknowledgments (ACKs). In the absence of such frames, novel techniques are required for rate selection. We present OFRA, a receiver-based rate adaptation algorithm that works with ACK-less traffic. Feedback information is sent on-demand using a control frame to explicitly inform the transmitter about which bit rate to use on subsequent data frames. This approach guarantees standard conformity and exhibits fast and accurate bit rate adaptation at the cost of a modest overhead increase. We evaluate the performance of OFRA against various state-of-the-art rate adaptation schemes by means of simulations. If ACK frames are to be transmitted, OFRA performs better than related work in most considered scenarios, and on par in the others. In the absence of ACKs, OFRA provides large goodput gains under good channel conditions and comparable goodput in other situations. OFRA refector fileadmin/papers/2012/2012-schmidt-pimrc-ofra.pdf Online IEEE Proceedings of the 23rd IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC'12), Sydney, Australia Sydney, Australia 23rd IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC'12) 9-12 September 2012 en 978-1-4673-2566-0 2166-9570 10.1109/PIMRC.2012.6362818 1 FlorianSchmidt AnwarHithnawi OscarPuñal JamesGross KlausWehrle inproceedings 2012-aktas-new2an-AnAdaptiveCodecSwitchingSchemeforSIPbasedVoIP-conference Proceedings of the 12th International Conference on Next Generation Wired/Wireless Networking (NEW2AN 2012) 2012 8 27 1-12 Contemporary Voice-Over-IP (VoIP) systems typically ne- gotiate only one codec for the entire VoIP session life time. However, as different codecs perform differently well under certain network conditions like delay, jitter or packet loss, this can lead to a reduction of quality if those conditions change during the call. This paper makes two core contributions: First, we compare the speech quality of a set of stan- dard VoIP codecs given different network conditions. Second, we propose an adaptive end-to-end based codec switching scheme that fully conforms to the SIP standard. Our evaluation with a real-world prototype based on Linphone shows that our codec switching scheme adapts well to changing network conditions, improving overall speech quality. crawler fileadmin/papers/2012/2012-aktas-new2an-codecswitching.pdf Online LNCS Proceedings of the 12th International Conference on Next Generation Wired/Wireless Networking (NEW2AN 2012), St. Pettersburg, Russia. St. Pettersburg, Russia 12th International Conference on Next Generation Wired/Wireless Networking (NEW2AN 2012) 27-29 August, 2012 en 978-3-642-32685-1 10.1007/978-3-642-32686-8_32 1 IsmetAktas FlorianSchmidt EliasWeingaertner Caj-JulianSchnelke KlausWehrle inproceedings 2012-aktas-wowmom-CRAWLER:AnExperimentationPlatformforSystemMonitoringandCross-Layer-Coordination-conference Proceedings of the 13th International Symposium on a World of Wireless, Mobile and MultimediaNetworks (WoWMoM'12), San Francisco, USA 2012 6 25 1--9 crawler fileadmin/papers/2012/2012-aktas-wowmom-crawler.pdf Online IEEE Proceedings of the 13th International Symposium on a World of Wireless, Mobile and MultimediaNetworks (WoWMoM'12), San Francisco, USA San Francisco 13th International Symposium on a World of Wireless, Mobile and MultimediaNetworks (WoWMoM'12) 25-28 June, 2012 en 978-1-4673-1238-7 10.1109/WoWMoM.2012.6263686 1 IsmetAktas FlorianSchmidt Muhammad HamadAlizai TobiasDrüner KlausWehrle inproceedings 2012-aktas-simutools-FANTASY:FullyAutomaticNetworkEmulationArchitecturewithCross-LayerSupport-conference 2012 3 19 57-64 crawler, fantasy fileadmin/papers/2012/2012-aktas-simutools-fantasy.pdf http://dl.acm.org/citation.cfm?id=2263019&CFID=88550183&CFTOKEN=31687193 Online ICST

Brussels, Belgium

Proceedings of the 5th ACM International ICST Conference on Simulation Tools and Techniques (SIMUTools '12), Desenzano del Garda, Italy Desenzano, Italy 5th ACM International ICST Conference on Simulation Tools and Techniques (SIMUTools '12) 19-23 March, 2012 en 978-1-4503-1510-4 10.4108/icst.simutools.2012.247759 1 IsmetAktas Hendrikvom Lehn ChristophHabets FlorianSchmidt KlausWehrle