Adaptive Communication in Wireless LANs Using Cross-Layer Scheduling

Conference: Mobilfunk - Technologien und Anwendungen - 12. ITG-Fachtagung
05/30/2007 - 05/31/2007 at Osnabrück, Germany

Proceedings: Mobilfunk - Technologien und Anwendungen

Pages: 6Language: englishTyp: PDF

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Könsgen, Andreas; Herdt, Waldemar; Wang, Hongyou; Timm-Giel, Andreas; Görg, Carmelita (Communication Networks, Centre for Computing Technologies, University of Bremen, Germany)

In this paper, a QoS-aware cross-layer scheduler for wireless LANs is introduced which allows the control of a number of data flows according to QoS requirements of the respective applications. It is based on a two-stage concept: The MAC layer scheduler uses a utility function to calculate the priority of a particular flow, whereas the PHY layer scheduler considers the channel conditions of a MIMO-TDMA transmission. It is shown that with the concept presented here, throughput and delay requirements of time-critical applications can be met.