<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>5166</id>
    <completedYear/>
    <publishedYear>2014</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>75</pageFirst>
    <pageLast>89</pageLast>
    <pageNumber/>
    <edition>EMS Series in Industrial and Applied Mathematics</edition>
    <issue/>
    <volume>1</volume>
    <type>incollection</type>
    <publisherName>European Mathematical Society</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Mathematics for telecommunications</title>
    <parentTitle language="eng">MATHEON - Mathematics for Key Technologies</parentTitle>
    <identifier type="doi">10.4171/137</identifier>
    <enrichment key="PeerReviewed">no</enrichment>
    <submitter>Axel Werner</submitter>
    <author>Axel Werner</author>
    <editor>Peter Deuflhard</editor>
    <editor>Martin Grötschel</editor>
    <author>Frank Aurzada</author>
    <editor>Dietmar Hömberg</editor>
    <author>Andreas Bley</author>
    <editor>Ulrich Horst</editor>
    <author>Andreas Eisenblätter</author>
    <author>Hans-Florian Geerdes</author>
    <editor>Jürg Kramer</editor>
    <editor>Volker Mehrmann</editor>
    <author>Mijail Guillemard</author>
    <author>Gitta Kutyniok</author>
    <editor>Konrad Polthier</editor>
    <author>Friedrich Philipp</author>
    <editor>Frank Schmidt</editor>
    <author>Christian Raack</author>
    <editor>Christof Schütte</editor>
    <author>Michael Scheutzow</author>
    <editor>Martin Skutella</editor>
    <editor>Jürgen Sprekels</editor>
    <collection role="institutes" number="optimization">Mathematical Optimization</collection>
    <collection role="projects" number="DESI">DESI</collection>
    <collection role="projects" number="FTTX-PLAN">FTTX-PLAN</collection>
    <collection role="projects" number="MATHEON-B3">MATHEON-B3</collection>
    <collection role="institutes" number="aopt">Applied Optimization</collection>
  </doc>
  <doc>
    <id>5622</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>97</pageFirst>
    <pageLast>113</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>13</volume>
    <type>conferenceobject</type>
    <publisherName>Springer</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Optimal battery control for smart grid nodes</title>
    <abstract language="eng">Energy storages can be of great value when added to power grids. They introduce the possibility to store and release energy whenever this is favorable. This is particularly relevant, for example, if power supply is volatile (as is the case with renewable energy) and the network is small (so that there are few other nodes that might balance fluctuations in consumption or production). We present models and methods from mathematical optimization for computing an optimized storage schedule for this purpose. We look at alternative optimization objectives, such as smallest possible peak load, low energy costs, or the close approximation of a prescribed load curve. The optimization needs to respect general operational and economic constraints as well as limitations in the use of storage, which are imposed by the chosen storage technology. We therefore introduce alternative approaches for modeling the non-linear properties of energy storages and study their impact on the efficiency of the optimization process. Finally, we present a computational study with batteries as storage devices. We use this to highlight the trade-off between solution quality and computational tractability. A version of the model for the purpose of leveling peaks and instabilities has been implemented into a control system for an office-building smart grid scenario.</abstract>
    <parentTitle language="eng">Optimization in the Real World - Towards Solving Real-World Optimization Problems</parentTitle>
    <identifier type="doi">10.1007/978-4-431-55420-2_6</identifier>
    <enrichment key="Series">Mathematics for Industry</enrichment>
    <enrichment key="PeerReviewed">yes</enrichment>
    <enrichment key="PreprintUrn">urn:nbn:de:0297-zib-53550</enrichment>
    <author>Andreas Draegert</author>
    <editor>Katsuki Fujisawa</editor>
    <submitter>Axel Werner</submitter>
    <author>Andreas Eisenblätter</author>
    <editor>Yuji Shinano</editor>
    <author>Inken Gamrath</author>
    <editor>Hayato Waki</editor>
    <author>Axel Werner</author>
    <collection role="institutes" number="optimization">Mathematical Optimization</collection>
    <collection role="projects" number="DESI">DESI</collection>
    <collection role="persons" number="inken.gamrath">Gamrath, Inken</collection>
    <collection role="institutes" number="aopt">Applied Optimization</collection>
  </doc>
  <doc>
    <id>3276</id>
    <completedYear>2003</completedYear>
    <publishedYear>2003</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>report</type>
    <publisherName>MOMENTUM</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Describing UMTS Radio Networks using XML</title>
    <author>Andreas Eisenblätter</author>
    <author>Hans-Florian Geerdes</author>
    <author>Thorsten Koch</author>
    <author>Ulrich Türke</author>
    <collection role="persons" number="koch">Koch, Thorsten</collection>
  </doc>
  <doc>
    <id>3277</id>
    <completedYear>2003</completedYear>
    <publishedYear>2003</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue>TD(03) 167</issue>
    <volume/>
    <type>report</type>
    <publisherName>COST 273</publisherName>
    <publisherPlace>Prague, Czech Republic</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">MOMENTUM Public Planning Scenarios and their XML Format</title>
    <author>Andreas Eisenblätter</author>
    <author>Hans-Florian Geerdes</author>
    <author>Thorsten Koch</author>
    <author>Ulrich Türke</author>
    <collection role="persons" number="koch">Koch, Thorsten</collection>
  </doc>
  <doc>
    <id>3244</id>
    <completedYear>2003</completedYear>
    <publishedYear>2003</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>Kluver</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Modelling Feasible Network Configurations for UMTS</title>
    <parentTitle language="eng">Telecommunications Network Design and Management</parentTitle>
    <identifier type="url">http://opus.kobv.de/zib/volltexte/2002/684/</identifier>
    <enrichment key="PreprintUrn">urn:nbn:de:0297-zib-6837</enrichment>
    <author>Andreas Eisenblätter</author>
    <editor>G. Anandalingam</editor>
    <editor>S. Raghavan</editor>
    <author>Thorsten Koch</author>
    <author>Alexander Martin</author>
    <author>Tobias Achterberg</author>
    <author>Armin Fügenschuh</author>
    <author>Arie M.C.A. Koster</author>
    <author>Oliver Wegel</author>
    <author>Roland Wessäly</author>
    <collection role="persons" number="achterberg">Achterberg, Tobias</collection>
    <collection role="persons" number="fuegenschuh">Fügenschuh, Armin</collection>
    <collection role="persons" number="koch">Koch, Thorsten</collection>
  </doc>
  <doc>
    <id>3246</id>
    <completedYear>2003</completedYear>
    <publishedYear>2003</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>31</pageFirst>
    <pageLast>38</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>Springer</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Optimisation Methods for UMTS Radio Network Planning</title>
    <parentTitle language="eng">Operation Research Proceedings 2003</parentTitle>
    <identifier type="doi">10.1007/978-3-642-17022-5_5</identifier>
    <enrichment key="PreprintUrn">urn:nbn:de:0297-zib-7637</enrichment>
    <author>Andreas Eisenblätter</author>
    <editor>Dino Ahr</editor>
    <author>Armin Fügenschuh</author>
    <editor>Roland Fahrion</editor>
    <author>Hans-Florian Geerdes</author>
    <editor>Marcus Oswald</editor>
    <author>Daniel Junglas</author>
    <editor>Gerhard Reinelt</editor>
    <author>Thorsten Koch</author>
    <author>Alexander Martin</author>
    <collection role="persons" number="fuegenschuh">Fügenschuh, Armin</collection>
    <collection role="persons" number="koch">Koch, Thorsten</collection>
  </doc>
  <doc>
    <id>296</id>
    <completedYear/>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>reportzib</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>1997-06-20</completedDate>
    <publishedDate>1997-06-20</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">A Frequency Assignment Problem in Cellular Phone Networks</title>
    <abstract language="eng">We present a mathematical formulation of a \emph{frequency assignment problem} encountered in cellular phone networks: frequencies have to be assigned to stationary transceivers (carriers) such that as little interference as possible is induced while obeying several technical and legal restrictions. The optimization problem is NP-hard, and no good approximation can be guaranteed---unless P = NP. We sketch some starting and improvement heuristics, and report on their successful application for solving the frequency assignment problem under consideration. Computational results on real-world instances with up to 2877 carriers and 50 frequencies are presented.</abstract>
    <identifier type="serial">SC-97-27</identifier>
    <identifier type="opus3-id">297</identifier>
    <identifier type="urn">urn:nbn:de:0297-zib-2965</identifier>
    <enrichment key="SourceTitle">Appeared in: Network design: connectivity and facilities location. P. M. Pardalos, D. Du (eds.) Providence, RI: American Mathematical Society 1998. DIMACS series in discrete mathematics and theoretical computer science, 40. Pp. 109-115</enrichment>
    <author>Andreas Eisenblätter</author>
    <series>
      <title>ZIB-Report</title>
      <number>SC-97-27</number>
    </series>
    <collection role="ddc" number="000">Informatik, Informationswissenschaft, allgemeine Werke</collection>
    <collection role="institutes" number="">ZIB Allgemein</collection>
    <file>https://opus4.kobv.de/opus4-zib/files/296/SC-97-27.ps</file>
    <file>https://opus4.kobv.de/opus4-zib/files/296/SC-97-27.pdf</file>
  </doc>
  <doc>
    <id>304</id>
    <completedYear/>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>reportzib</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>1997-07-11</completedDate>
    <publishedDate>1997-07-11</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Frequency Assignment in Cellular Phone Networks</title>
    <abstract language="eng">We present a graph-theoretic model for the \emph{frequency assignment problem} in Cellular Phone Networks: Obeying several technical and legal restrictions, frequencies have to be assigned to transceivers so that interference is as small as possible. This optimization problem is NP-hard. Good approximation cannot be guaranteed, unless P = NP. We describe several assignment heuristics. These heuristics are simple and not too hard to implement. We give an assessment of the heuristics' efficiency and practical usefulness. For this purpose, typical instances of frequency assignment problems with up to 4240 transceivers and 75 frequencies of a German cellular phone network operator are used. The results are satisfying from a practitioner's point of view. The best performing heuristics were integrated into a network planning system used in practice.</abstract>
    <identifier type="serial">SC-97-35</identifier>
    <identifier type="opus3-id">305</identifier>
    <identifier type="urn">urn:nbn:de:0297-zib-3044</identifier>
    <identifier type="doi">10.1023/A:1018908907763</identifier>
    <enrichment key="SourceTitle">Appeared in: Annals of OR 76 (1998), 73-93</enrichment>
    <author>Ralf Borndörfer</author>
    <author>Andreas Eisenblätter</author>
    <author>Martin Grötschel</author>
    <author>Alexander Martin</author>
    <series>
      <title>ZIB-Report</title>
      <number>SC-97-35</number>
    </series>
    <collection role="ddc" number="000">Informatik, Informationswissenschaft, allgemeine Werke</collection>
    <collection role="institutes" number="">ZIB Allgemein</collection>
    <collection role="persons" number="borndoerfer">Borndörfer, Ralf</collection>
    <collection role="persons" number="groetschel">Grötschel, Martin</collection>
    <file>https://opus4.kobv.de/opus4-zib/files/304/SC-97-35.ps</file>
    <file>https://opus4.kobv.de/opus4-zib/files/304/SC-97-35.pdf</file>
  </doc>
  <doc>
    <id>717</id>
    <completedYear/>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>reportzib</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2002-12-19</completedDate>
    <publishedDate>2002-12-19</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Load Balancing in Signaling Transfer Points</title>
    <abstract language="eng">Signaling is crucial to the operation of modern telecommunication networks. A breakdown in the signaling infrastructure typically causes customer service failures, incurs revenue losses, and hampers the company image. Therefore, the signaling network has to be highest reliability and survivability. This in particular holds for the routers in such a network, called \textit{signaling transfer points\/} (STPs). The robustness of an STP can be improved by equally distributing the load over the internal processing units. Several constraints have to be taken into account. The load of the links connected to a processing unit changes over time introducing an imbalance of the load. In this paper, we show how integer linear programming can be applied to reduce the imbalance within an STP, while keeping the number of changes small. Two alternative models are presented. Computational experiments validate the integer programming approach in practice. The GSM network operator E-Plus saves substantial amounts of time and money by employing the proposed approach.</abstract>
    <identifier type="serial">02-50</identifier>
    <identifier type="opus3-id">718</identifier>
    <identifier type="urn">urn:nbn:de:0297-zib-7179</identifier>
    <author>Andreas Eisenblätter</author>
    <author>Arie M.C.A. Koster</author>
    <author>Randolf Wallbaum</author>
    <author>Roland Wessäly</author>
    <series>
      <title>ZIB-Report</title>
      <number>02-50</number>
    </series>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Signaling network</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>STP</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>load-balancing</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>integer programming</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>computations</value>
    </subject>
    <collection role="ddc" number="000">Informatik, Informationswissenschaft, allgemeine Werke</collection>
    <collection role="msc" number="90B18">Communication networks [See also 68M10, 94A05]</collection>
    <collection role="msc" number="90C10">Integer programming</collection>
    <collection role="msc" number="90C90">Applications of mathematical programming</collection>
    <collection role="institutes" number="">ZIB Allgemein</collection>
    <file>https://opus4.kobv.de/opus4-zib/files/717/ZR-02-50.ps</file>
    <file>https://opus4.kobv.de/opus4-zib/files/717/ZR-02-50.pdf</file>
  </doc>
  <doc>
    <id>683</id>
    <completedYear/>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>reportzib</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2002-04-02</completedDate>
    <publishedDate>2002-04-02</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Modelling Feasible Network Configurations for UMTS</title>
    <abstract language="eng">A model for the optimisation of the location and configuration of base stations in a UMTS network is described. The focus is primarily on modelling the configuration problem sufficiently accurate using mixed-integer variables and (essentially) linear constraints. These constraints reflect the limited downlink code capacity in each cell, the interference limitations for successful up- and downlink transmissions, the need for sufficiently strong (cell) pilot signals, and the potential gain for mobiles from being in soft(er) hand-over. It is also explained how to use the model as a basis for rating network configurations.</abstract>
    <identifier type="serial">02-16</identifier>
    <identifier type="opus3-id">684</identifier>
    <identifier type="urn">urn:nbn:de:0297-zib-6837</identifier>
    <enrichment key="SourceTitle">Appeared in: Telecommunications Network Design and Management. G. Anandalingam, S. Raghavan (eds.) Boston: Kluwer Academic Publ. 2002. ISBN 1-4020-7318-6, pp. 1-24</enrichment>
    <author>Andreas Eisenblätter</author>
    <author>Armin Fügenschuh</author>
    <author>Thorsten Koch</author>
    <author>Arie M.C.A. Koster</author>
    <author>Alexander Martin</author>
    <author>Tobias Pfender</author>
    <author>Oliver Wegel</author>
    <author>Roland Wessäly</author>
    <series>
      <title>ZIB-Report</title>
      <number>02-16</number>
    </series>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>UMTS</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>radio interface</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>network planning</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>configuration</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>perfect power control</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>mathematical model</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>mixed integer programming</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>MOMENTUM</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>IST-20</value>
    </subject>
    <collection role="ddc" number="000">Informatik, Informationswissenschaft, allgemeine Werke</collection>
    <collection role="msc" number="90B18">Communication networks [See also 68M10, 94A05]</collection>
    <collection role="msc" number="90C11">Mixed integer programming</collection>
    <collection role="institutes" number="">ZIB Allgemein</collection>
    <collection role="persons" number="achterberg">Achterberg, Tobias</collection>
    <collection role="persons" number="fuegenschuh">Fügenschuh, Armin</collection>
    <collection role="persons" number="koch">Koch, Thorsten</collection>
    <file>https://opus4.kobv.de/opus4-zib/files/683/ZR-02-16.ps</file>
    <file>https://opus4.kobv.de/opus4-zib/files/683/ZR-02-16.pdf</file>
  </doc>
  <doc>
    <id>763</id>
    <completedYear/>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>reportzib</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2003-12-03</completedDate>
    <publishedDate>2003-12-03</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Optimization Methods for UMTS Radio Network Planning</title>
    <abstract language="eng">The UMTS radio network planning problem poses the challenge of designing a cost-effective network that provides users with sufficient coverage and capacity. We describe an optimization model for this problem that is based on comprehensive planning data of the EU project MOMENTUM. We present heuristic mathematical methods for this realistic model, including computational results.</abstract>
    <identifier type="serial">03-41</identifier>
    <identifier type="opus3-id">764</identifier>
    <identifier type="urn">urn:nbn:de:0297-zib-7637</identifier>
    <enrichment key="SourceTitle">Appeared in: Operation Research Proceedings 2003, pp. 31-38, D. Ahr, R. Fahrion, M. Oswald and G. Reinelt (eds.), Springer, ISBN 3-540-41445-3</enrichment>
    <author>Andreas Eisenblätter</author>
    <author>Armin Fügenschuh</author>
    <author>Hans-Florian Geerdes</author>
    <author>Daniel Junglas</author>
    <author>Thorsten Koch</author>
    <author>Alexander Martin</author>
    <series>
      <title>ZIB-Report</title>
      <number>03-41</number>
    </series>
    <collection role="ddc" number="000">Informatik, Informationswissenschaft, allgemeine Werke</collection>
    <collection role="institutes" number="">ZIB Allgemein</collection>
    <collection role="persons" number="fuegenschuh">Fügenschuh, Armin</collection>
    <collection role="persons" number="koch">Koch, Thorsten</collection>
    <file>https://opus4.kobv.de/opus4-zib/files/763/ZR-03-41.ps</file>
    <file>https://opus4.kobv.de/opus4-zib/files/763/ZR-03-41.pdf</file>
  </doc>
</export-example>
