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Multi-User-Zugang in hocheffizienten WLANs by Brahmi, Saloua

Multi-User-Zugang in hocheffizienten WLANs

by Saloua Brahmi , Mohand Yazid
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Book cover type: Paperback
  • ISBN13: 9786206817543
  • Binding: Paperback
  • Subject: N/A
  • Publisher: Verlag Unser Wissen
  • Publisher Imprint: Verlag Unser Wissen
  • Publication Date:
  • Pages: 88
  • Original Price: GBP 52.98
  • Language: German
  • Edition: N/A
  • Item Weight: 127 grams
  • BISAC Subject(s): Networking / General

Um die MU-Kommunikation (Multi-User) in hocheffizienten WLANs zu f�rdern, hat der neue IEEE 802.11ax-Standard das Konzept der RU (Resource Unit) mit Hilfe der OFDMA-�bertragungstechnik eingef�hrt. Obwohl die OFDMA-MU-Kommunikation es erm�glicht, mehrere Benutzer gleichzeitig sowohl in DL- (Down-Link) als auch in UL-Richtung (Up-Link) zu bedienen, m�ssen noch mehrere Herausforderungen bew�ltigt werden, um ein MAC-Protokoll (Medium Access Control) zu entwickeln, das die RUs gerecht zuweist und effektiv nutzt. Die zu bew�ltigenden Herausforderungen sind: (1) Festlegung, wann und wie 802.11ax-Kontrollrahmen verwendet werden, (2) Festlegung einer fairen Sendepolitik f�r UL-Bed�rfnisse, (3) Annahme einer Strategie zur Auswahl einer Kanalstruktur und (4) Vermeidung von Verlusten bei der spektralen Effizienz und Zeit�berschreitung BA (Block Acknowledgment). In dieser Arbeit haben wir das FAEU-RUs-Protokoll (Fair Allocation and Effective Utilization of RUs) vorgeschlagen, das alle Herausforderungen der OFMDA MU-Kommunikation erf�llt. Die Leistungsbewertung zeigt, dass das FAEU-RUs-Protokoll die Gesamtleistung des Netzes, aber auch die individuelle Leistung jeder Verkehrsart (DL und UL) und jeder Stationskategorie erheblich verbessert.

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