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  • Hartmann, Christian  (19)
Type of Medium
Language
Year
  • 1
    Language: English
    In: European Transactions on Telecommunications, July 2004, Vol.15(4), pp.373-374
    ISSN: 1124-318X
    E-ISSN: 1541-8251
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  • 2
    Language: English
    In: European Transactions on Telecommunications, September 2001, Vol.12(5), pp.439-452
    Description: In this paper we discuss different Radio Resource Management (RRM) strategies for smart antenna cellular networks. The focus is on adaptive strategies which combine spatial channel reuse within the cell with dynamic inter—cell channel allocation. In particular, three different SDMA channel allocation strategies are described and compared in terms of complexity as well as traffic capacity. The comparison is done by means of system simulations of a multi—cellular environment. We show that with a growing degree of freedom the RRM strategies yield better results in terms of traffic capacity while the number of handoffs per call increases and the complexity grows.
    ISSN: 1124-318X
    E-ISSN: 1541-8251
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  • 3
    In: Frequenz, Vol.60(5), pp.111-115
    Description: This article adresses the QoS compliant delivery of packet data flows through the MAC and PHY layers of a wirless communication system. The available degrees of freedom in the call admission control, the scheduling unit, the MAC protocol as well as in the signal processing units of the PHY layer are employed to maximize the resource efficiency or equivalently minimize the amount of resources required for a quality compliant service. In order to solve the resulting cross-layer problem the authors make three contributions: First, a generic approach derives an optimum solution to the problem of jointly optimizing the radio parameters in a system that is constrained by upper layer requirements. Second, QoS aware scheduling algorithms are proposed that access the cross-layer information provided by the above scheme. Based upon these scheduling techniques a third part targets the problem of call admission control. Basing its decision on cross-layer knowledge gathered in the above schemes the admission control can be designed to maximize the number of flows that can be served QoS compliantly. The proposed compound of cross-layer techniques is evaluated numerically.
    Keywords: Ressourcenplanung ; Kommunikationssystem ; Paketvermittlung ; Drahtlose Übertragung ; Ruftechnik ; Signalverarbeitung ; Erlaubnis ; Service-Qualität ; Engineering;
    ISSN: 0016-1136
    E-ISSN: 2191-6349
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  • 4
    Book chapter
    Book chapter
    Chichester, UK: John Wiley & Sons, Ltd
    Language: English
    In: GSM – Architecture, Protocols and Services, Chapter refs, p.313-315
    ISBN: 9780470030707
    Source: John Wiley & Sons, Inc.
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  • 5
    Book chapter
    Book chapter
    Chichester, UK: John Wiley & Sons, Ltd
    Language: English
    In: GSM – Architecture, Protocols and Services, Chapter fmatter, p.i-xi
    Description: the prelims comprise: half‐title page title page copyright page table of contents preface
    ISBN: 9780470030707
    Source: John Wiley & Sons, Inc.
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  • 6
    Language: English
    In: GSM – Architecture, Protocols and Services, Appendices, Chapter app1, p.271-293
    Description: this appendix contains sections titled: reference configuration overview of data communication service selection at transitions between networks bit rate adaptation asynchronous data services synchronous data services teleservices: fax
    ISBN: 9780470030707
    Source: John Wiley & Sons, Inc.
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  • 7
    Language: English
    In: GSM – Architecture, Protocols and Services, Appendices, Chapter app2, p.295-304
    Description: this appendix contains sections titled: objectives of gsm nm telecommunication management network tmn realization in gsm networks
    ISBN: 9780470030707
    Source: John Wiley & Sons, Inc.
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  • 8
    Book chapter
    Book chapter
    Chichester, UK: John Wiley & Sons, Ltd
    Language: English
    In: GSM – Architecture, Protocols and Services, Chapter 1, p.1-7
    Description: this chapter contains sections titled: the idea of unbounded communication the success of gsm classification of mobile communication systems some history and statistics of gsm overview of the book
    Keywords: Communication System Digitalization ; Gsm (Global System For Mobile Communication) ; Gsm – Architecture, Protocols And Services ; Personal Communication Networks (Pcns) And Personal Communication Systems (Pcss) ; Digital Enhanced Cordless Telecommunications (Dect) ; Wireless Lans (Wlans) ; Satellite Communication And Low Earth Orbiting (Leo) Or Meo Satellites ; Gsm Networks And Spacial Filtering For Interference Reduction (Sfir)
    ISBN: 9780470030707
    Source: John Wiley & Sons, Inc.
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  • 9
    Book chapter
    Book chapter
    Chichester, UK: John Wiley & Sons, Ltd
    Language: English
    In: GSM – Architecture, Protocols and Services, Appendices, Chapter app3, p.305-305
    ISBN: 9780470030707
    Source: John Wiley & Sons, Inc.
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  • 10
    Language: English
    In: GSM – Architecture, Protocols and Services, Chapter 2, p.9-41
    Description: this chapter contains sections titled: characteristics of the mobile radio channel separation of directions and duplex transmission multiple access cellular principle
    Keywords: Mobile Radio Channel And Cellular Principle ; Bidirectional Communication And Duplex Transmission ; Frequency Division Multiple Access (Fdma) ; Tdma And Frequency Hopping Technique ; Space Division Multiple Access ; Line Of Sight (Los) Connection ; Spatial Multiple Access (Uplink) ; Frequency Reuse And Cluster Formation ; Sfir Interference Scenario Downlink
    ISBN: 9780470030707
    Source: John Wiley & Sons, Inc.
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