This file was created by the TYPO3 extension bib --- Timezone: UTC Creation date: 2024-10-06 Creation time: 16-00-20 --- Number of references 7 conference VTC2013_parruca_gross 2013 9 Various system tasks like interference coordination, handover decisions, admission control etc. in upcoming cellular networks require precise mid-term (spanning over a few seconds) performance models. Due to channel-dependent scheduling at the base station, these performance models are not simple to obtain. Furthermore, upcoming cellular systems will be interference-limited, hence, the way interference is modeled is crucial for the accuracy. In this paper we present an analytical model for the SINR distribution of the scheduled subcarriers of an OFDMA system with proportional fair scheduling. The model takes the precise SINR distribution into account. We furthermore refine our model with respect to uniform modulation and coding, as applied in LTE networks. The derived models are validated by means of simulations. In additon, we show that our models are approximate estimators for the performance of rate-based proportional fair scheduling, while they outperform some simpler prediction models from related work significantly. https://www.comsys.rwth-aachen.de/fileadmin/papers/2013/2013_VTC_parruca.pdf Proceedings of IEE Vehicular Telecommunications Conference (VTC-Fall 2013) Las Vegas, USA 2013 IEEE 78th Vehicular Technology Conference 2-5, September, 2013 DonaldParruca MariusGrysla SimonGörtzen JamesGross conference 2013-wowmom-punal-RFRA 2013 6 4 IEEE Proceedings of the 14th IEEE International Symposium on a World of Wireless Mobile and Multimedia Networks (WoWMoM'13) Madrid, Spain WoWMoM June, 2013 accepted OscarPuñal HanzhiZhang JamesGross inproceedings Dombrowski2013WiOpt 2013 5 13 341-348 energy minimization;quality-of-service;outage probability;deadline;optimization;multi-hop;average csi;instantaneous csi 11th International Symposium on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks (WiOpt 2013) Tsukuba Science City, Japan English 1 ChristianDombrowski NedaPetreska SimonGörtzen AnkeSchmeink JamesGross proceedings parruca_gross_2013 2013 1 25 1184,1190 Upcoming LTE networks have basically two different modes for scheduling data in the down-link by the base station. Dynamic scheduling brings the advantage of exploiting instantaneous channel state information while it puts on the other hand a significant burden on the system in terms of overhead and computation requirements. Especially for small packets that show up periodically, the overhead is typically too high. Therefore, the base station can serve such packet flows by the semi-persistent scheduling mode. In this mode, a certain resource allocation is fixed to a periodic schedule. While this does not allow any longer to exploit instantaneous channel states, it requires much less overhead. In this paper, we address the problem of selecting a modulation and coding scheme for such semi-persistent scheduling grants. The problem lies here in the stochastic characterization of the resource blocks over the next few seconds while on the other hand estimating based on such a characterization the blok error rate (and hence the average goodput). We provide a novel scheme, which outperforms all previously presented schemes significantly. The underlying model that we provide can also be used for any other long-term decision in an LTE system with semi-persistent scheduling such as interference coordination, handover decision etc. Long Term Evolution;decision making;dynamic scheduling;error statistics;modulation;radio links;resource allocation;stochastic processes;wireless channels;LTE networks;base station;blok error rate;data scheduling;down-link;dynamic scheduling;instantaneous channel state information;long-term decision;modulation selection;packet flows;periodic scheduling;rate selection analysis;resource allocation;resource blocks;semi-persistent scheduling mode;stochastic characterization www.performance.rwth-aachen.de/publications/conferences/2013ICNC_parruca.pdf http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6504261 San Diego, USA International Conference on Computing, Networking and Communications (ICNC) 2013 28-31 January 2013 English 978-1-4673-5287-1 10.1109/ICCNC.2013.6504261 DonaldParruca JamesGross inproceedings 2013-ccnc-lora-gossipmule 2013 1 11 Proceedings of the 1st Workshop on People Centric Sensing and Communications accepted 1 Mónica AlejandraLora Girón AlexanderPaulus KlausWehrle inproceedings 2013-ccncdemo-lora-gossipmule 2013 1 Proceedings of the 10th IEEE Consumer Communications & Networking Conference, CCNC Las Vegas, Nevada, USA CCNC 2013 Demonstration Track accepted Mónica AlejandraLora Girón AlexanderPaulus KlausWehrle conference EW2013_parruca_gross 2013 8 In this paper we consider the design of semi-static inter-cell interference coordination schemes for LTE networks. In this approach, base stations coordinate the power settings per resource block over long time spans such as seconds. In order to optimize the power settings, one needs to employ models which predict the rate of terminals over the next coordination period under the usage of a given power setting. However, these models are typically quite simple and neglect the impact from fading as well as from dynamic resource allocation performed at the base stations on a millisecond basis. Ignoring such properties of OFDMA networks leads therefore to suboptimal transmit power settings. In this paper, we study the impact from a precise rate prediction model that accurately accounts for fading and dynamic resource allocation. On the down-side, this more precise model leads to a much more involved optimization problem to be solved once per coordination period. We propose two different heuristic methods to deal with this problem. Especially the usage of genetic algorithm results to be promising to counteract the complexity increase. We then study the overall system performance and find precise rate prediction models to be essential for semi-static interference coordination as they provide significant performance improvements in comparison to approaches with simpler models. ICIC, proportional fair scheduling, power mask, resource block, scheduling, dynamic scheduling, inter cell interference coordination, LTE, OFDMA, WiMAX https://www.comsys.rwth-aachen.de/fileadmin/papers/2013/2013_ICIC_parruca_grysla_gross.pdf http://www.vde-verlag.de/proceedings-en/563498043.html vde-verlag vde-verlag

http://www.vde-verlag.de/

Proceedings: European Wireless 2013 Guildford, UK 2013 - 19th European Wireless Conference 04/16/2012 - 04/18/2013 English DonaldParruca MariusGrysla PetriMähönen MarinaPetrova HanZhou FarshadNaghibi JamesGross