A Differentiated Cooperative MAC for QoS enhancement in Wireless LANs

Guo, Tao, Carrasco, Rolando and Woo, Wai Lok (2008) A Differentiated Cooperative MAC for QoS enhancement in Wireless LANs. In: PIMRC 2008 - 19th International Symposium on Personal, Indoor and Mobile Radio Communications, 15th - 18th September 2008, Cannes, France.

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Abstract

The quality of service (QoS) support in wireless local area networks (WLANs) faces a big challenge due to time-correlated fading channel. Conventional automatic repeat reQuest (ARQ) schemes based on time diversity may result in consecutive retransmission failures degrading QoS severely. This paper proposes a novel Differentiated cooperative medium access control (MAC) protocol, called DC-MAC, to enhance QoS in WLANs based on the IEEE 802.11e architecture. The retransmission is initiated from an appropriate transmission queue of an appropriate relay node instead of the original source to exploit spatial diversity. A novel negative acknowledgement (NAK) feedback mechanism is introduced for loss distinguishing and channel estimation such that cooperative retransmission will be employed only when necessary and only by competent nodes. Simulations conducted on the OPNET platform show that the proposed scheme significantly improves the performances of both multimedia applications and data applications in terms of throughput and delay while supporting service differentiation.

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	Quality of Service, cooperative communication, wireless LAN
Subjects:	G400 Computer Science
Department:	Faculties > Engineering and Environment > Computer and Information Sciences
Depositing User:	Paul Burns
Date Deposited:	24 May 2019 17:10
Last Modified:	10 Oct 2019 18:47
URI:	http://nrl.northumbria.ac.uk/id/eprint/39402

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