Retransmission cut-off half-duplex slotted aloha for wireless ad hoc and sensor networks

Authors:
Jahangir H. Sarker;Hussein T. Mouftah
Affiliations:
University of Ottawa, Ottawa, ON, Canada;University of Ottawa, Ottawa, ON, Canada
Venue:
Proceedings of the 6th ACM international symposium on Mobility management and wireless access
Year:
2008

Citing 4
Cited 0

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Effect of exponential backoff scheme and retransmission cutoff on the stability of frequency-hopping slotted ALOHA systems

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Abstract

Communication in wireless Ad Hoc and sensor networks may be achieved without a central entity (base station) and nodes communicate with each other in a half-duplex manner. In those kinds of networks each node either will be in a transmitting mode or in a receiving mode or in an idle mode. A transmission policy algorithm for half-duplex Slotted ALOHA is studied in terms of the node transmitting probability, the node receiving probability and the number of retransmission attempts. Results show that the retransmission cut-off is not required for the stable operation of half-duplex Slotted ALOHA, if the new packet transmission probability from each transmitting node is less than e-1/ (1+e-1) packet per time slot. The stability can also be achieved by decreasing the number of retransmission attempts sharply, when new packet transmission probability from each transmitting node is more than e-1/(1+e-1) packet per time slot. The results of this study are portrayed on graphs and may be used as a guideline of half-duplex contention-based multiple access schemes with and without retransmission cut-off.