Design and performance analysis on adaptive reservation-assisted collision resolution protocol for WLANs |
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Authors: | Jia-Shi Lin Kai-Ten Feng |
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Affiliation: | (1) Department of Electrical Engineering, National Chiao Tung University, Hsinchu, Taiwan |
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Abstract: | In conventional IEEE 802.11 medium access control protocol, the distributed coordination function is designed for the wireless
stations (WSs) to perform channel contention within the wireless local area networks (WLANs). Packet collision is considered
one of the major issues within this type of contention-based scheme, which can severely degrade network performance for the
WLANs. Research work has been conducted to modify the random backoff mechanism in order to alleviate the packet collision
problem while the WSs are contending for channel access. However, most of the existing work can only provide limited throughput
enhancement under specific number of WSs within the network. In this paper, an adaptive reservation-assisted collision resolution
(ARCR) protocol is proposed to improve packet collision resulting from the random access schemes. With its adaptable reservation
period, the contention-based channel access can be adaptively transformed into a reservation-based system if there are pending
packets required to be transmitted between the WSs and the access point. Analytical model is derived for the proposed ARCR
scheme in order to evaluate and validate its throughput performance. It can be observed from both analytical and simulation
results that the proposed protocol outperforms existing schemes with enhanced channel utilization and network throughput. |
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