Multi-user OFDMA Frame Aggregation for Future Wireless Local Area Networking

Authors:
James Gross;Oscar Puñal;Marc Emmelmann
Affiliations:
Mobile Network Performance Group, UMIC Research Centre, RWTH Aachen University, Aachen, Germany 52065;Mobile Network Performance Group, UMIC Research Centre, RWTH Aachen University, Aachen, Germany 52065;Telecommunication Networks Group, Berlin, Germany 10587
Venue:
NETWORKING '09 Proceedings of the 8th International IFIP-TC 6 Networking Conference
Year:
2009

Citing 2
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Abstract

State-of-the-art wireless local area networking enables frame aggregation as approach to increase MAC efficiency. However, frame aggregation is limited to the aggregation of packets destined for the same station. In order to serve different stations, the access point still has to contend for the channel multiple times. In this paper we propose and evaluate a novel approach that enables multi-user frame aggregation. We combine this concept with channel-dependent OFDMA resource assignments, yielding a higher PHY efficiency (by exploiting multi-user diversity and instantaneous channel state information) as well as a higher MAC efficiency. The downside to this approach is the increase in protocol overhead to enable such multi-user OFDMA frame aggregation. However, we show that the proposed approach outperforms state-of-the-art 802.11n for different packet sizes and stations to be served.