Abstract
The sender-centric medium access has been widely deployed to avoid interference in vehicular ad hoc networks, even though sender-centric physical carrier sensing suffers from exposed terminal problems and sender-centric virtual carrier sensing is relatively vulnerable to interference. In this paper, we propose a new receiver-centric MAC protocol, called RIMAC, to increase spatial reuse and network capacity. In RIMAC, the receivers accurately assess their channel status opposed to the sender initiated approach where senders can only heuristically infer that of their receivers. Therefore, the receiver-centric approach achieves a better level of spatial reuse with the same degree of interference prevention. Through both extensive numerical analysis and simulation studies, we find that the proposed receiver-centric MAC achieves up to 68 % higher network capacity than traditional sender-initiated approaches.
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Notes
Although ACK frames are generally small in size, it may contribute up to 21 % of the total transmission duration in 802.11a with 54Mbps data rate and 1kbyte payload due to the inter-frame spaces and the physical layer headers.
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Acknowledgments
This work was supported by the Gachon University research fund of 2013 (GCU-2013-R285).
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A preliminary version of this paper appeared in the International Workshop on Convergence Information System and Applications (IWCISA), Pattaya, Thailand, June 2013. This version adds detailed description, extended mathematical analysis, and simulation results on the performance of the proposal.
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Yoo, J. Receiver-centric physical carrier sensing for vehicular Ad Hoc networks. Multimed Tools Appl 74, 2405–2415 (2015). https://doi.org/10.1007/s11042-014-1851-3
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DOI: https://doi.org/10.1007/s11042-014-1851-3