Two-way Communication for IEEE 802.11n WLANs using Decode and Forward Relays


Marc Kuhn, Azadeh Ettefagh, Ingmar Hammerström, and Armin Wittneben


Asilomar Conference on Signals, Systems, and Computers 2006, Pacific Grove, CA, Oct. 2006.

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In this paper we investigate the integration of two-way decode-and-forward (2W DF) relaying in IEEE 802.11n WLANs. Two-way DF relaying is a signalling scheme recently proposed in [2] for half-duplex relays. We compare this scheme to conventional DF relaying in two scenarios, either the Access Point (AP) acts as DF relay (“two-way AP”) or a station. After analyzing capacity and coverage in the considered scenarios for the 5 GHz band, we con-clude that 2W DF relaying is able to increase the spectral efficiency and to reduce the delay of a two hop link in an 802.11n WLAN, while the communication range is smaller than in the case of a con-ventional DF relaying scheme.


relaying, cooperative transmission, 802.11n, WLAN, two-way channels

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