M. Z. Ahmad, D. Turgut, and R. Bhakthavathsalam. Circularity-based Medium Access Control in Mobile Ad hoc Networks. In Proceedings of 5th International Conference on AD-HOC Networks \& Wireless (AdHocNOW-2006), pp. 337–348, August 2006.
The RTS/CTS access scheme, designed to reduce the num- ber of collisions in a IEEE 802.11 network, is known to exhibit problems due to masked nodes, the imbalance between the interference range and the communication range of the nodes, and scenarios in which nodes are unnecessarily silenced, thus preventing parallel transmissions to take place. We present an approach for enhancing the performance of the IEEE 802.11 MAC protocol by selectively discarding or delaying specifi- cally marked RTS and CTS packets. By dropping the circularity-satisfied RTS, we allow certain parallel transmissions to proceed, even if there is a non-zero risk of collision. By delaying the circularity-satisfied CTS, we allow a neighboring parallel transmission to continue. One important feature of the circularity approach is that it is fully compatible with the IEEE 802.11 standard. We implemented the circularity approach in ns-2 simulator. Through a series of experiments, we show that the circular- ity approach provides a significant improvement in the throughput and end-to-end delay of the network, and contributes to a reduction of the number of collisions in most scenarios.
@inproceedings{Zubair-2006-AdhocNow,
author = "M. Z. Ahmad and D. Turgut and R. Bhakthavathsalam",
title = "Circularity-based Medium Access Control in Mobile Ad hoc Networks",
booktitle = "Proceedings of 5th International Conference on AD-HOC Networks \& Wireless (AdHocNOW-2006)",
location = "Ottawa, Canada",
pages = "337-348",
volume = "LNCS 4104",
month = "August",
year = "2006",
abstract = {
The RTS/CTS access scheme, designed to reduce the num- ber of collisions
in a IEEE 802.11 network, is known to exhibit problems due to masked
nodes, the imbalance between the interference range and the communication
range of the nodes, and scenarios in which nodes are unnecessarily
silenced, thus preventing parallel transmissions to take place. We
present an approach for enhancing the performance of the IEEE 802.11 MAC
protocol by selectively discarding or delaying specifi- cally marked RTS
and CTS packets. By dropping the circularity-satisfied RTS, we allow
certain parallel transmissions to proceed, even if there is a non-zero
risk of collision. By delaying the circularity-satisfied CTS, we allow a
neighboring parallel transmission to continue. One important feature of
the circularity approach is that it is fully compatible with the IEEE
802.11 standard. We implemented the circularity approach in ns-2
simulator. Through a series of experiments, we show that the circular-
ity approach provides a significant improvement in the throughput and
end-to-end delay of the network, and contributes to a reduction of the
number of collisions in most scenarios.
},
}
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