A dynamic NAV determination protocol in 802.11 based underwater networks

Dongseung Shin, Dongkyun Kim

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

35 Scopus citations

Abstract

In underwater networks, when designing contention-based MAC protocols such as CSMA/CA, a long propagation delay should be considered. Particularly, most protocols like 802.11, the most typical CSMA/CA protocol, which utilize the RTS/CTS handshaking technique with network allocation vector (NAV), determine the NAV using a value of duration field in RTS/CTS. The duration value is determined with a fixed inter-frame space such as SIFS and message lengths of CTS/DATA/ACK. Hence, they might be revised to employ the maximum propagation delay when determining the duration value. Nevertheless, in the cases where two closely-located nodes communicate, an unnecessarily long NAV duration according to the maximum propagation delay defers their neighbor nodes' transmission for a long duration time, which results in degrading network throughput. This paper therefore proposes a novel MAC protocol which determines the NAV dynamically by considering the propagation delay between nodes in order to avoid such an unnecessary long deferring. Through ns-2 based simulations, we verify that our MAC protocol achieved the performance improvements in terms of MAC transfer delay and throughput, as compared to a modified version of 802.11 which determines the NAV with the maximum propagation delay.

Original languageEnglish
Title of host publicationISWCS'08 - Proceedings of the 2008 IEEE International Symposium on Wireless Communication Systems
Pages401-405
Number of pages5
DOIs
StatePublished - 2008
Event2008 IEEE International Symposium on Wireless Communication Systems, ISWCS'08 - ReykjavIk, Iceland
Duration: 21 Oct 200824 Oct 2008

Publication series

NameISWCS'08 - Proceedings of the 2008 IEEE International Symposium on Wireless Communication Systems

Conference

Conference2008 IEEE International Symposium on Wireless Communication Systems, ISWCS'08
Country/TerritoryIceland
CityReykjavIk
Period21/10/0824/10/08

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