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dc.contributor.authorTang, Chong
dc.contributor.authorSong, Lixing
dc.contributor.authorBalasubramani, Jagadeesh
dc.contributor.authorWu, Shaoen
dc.contributor.authorBiaz, Saad
dc.contributor.authorYang, Qing
dc.contributor.authorWang, Honggang
dc.identifier.citationChong Tang; Lixing Song; Balasubramani, J.; Shaoen Wu; Biaz, S.; Qing Yang; Honggang Wang, "Comparative Investigation on CSMA/CA-Based Opportunistic Random Access for Internet of Things," Internet of Things Journal, IEEE , vol.1, no.2, pp.171,179, April 2014en_US
dc.description.abstractWireless communication is indispensable to Internet of Things (IoT). Carrier sensing multiple access/collision avoidance (CSMA/CA) is a well-proven wireless random access protocol and allows each node of equal probability in accessing wireless channel, which incurs equal throughput in long term regardless of the channel conditions. To exploit node diversity that refers to the difference of channel condition among nodes, this paper proposes two opportunistic random access mechanisms: overlapped contention and segmented contention, to favor the node of the best channel condition. In the overlapped contention, the contention windows of all nodes share the same ground of zero, but have different upper bounds upon channel condition. In the segmented contention, the contention window upper bound of a better channel condition is smaller than the lower bound of a worse channel condition; namely, their contention windows are segmented without any overlapping. These algorithms are also polished to provide temporal fairness and avoid starving the nodes of poor channel conditions. The proposed mechanisms are analyzed, implemented, and evaluated on a Linux-based testbed and in the NS3 simulator. Extensive comparative experiments show that both opportunistic solutions can significantly improve the network performance in throughput, delay, and jitter over the current CSMA/CA protocol. In particular, the overlapped contention scheme can offer 73.3% and 37.5% throughput improvements in the infrastructure-based and ad hoc networks, respectively.en_US
dc.subjectOpportunistic accessen_US
dc.subjectInternet of thingsen_US
dc.titleComparative Investigation on CSMA/CA-Based Opportunistic Random Access for Internet of Thingsen_US
mus.citation.journaltitleInternet of Things Journal, IEEEen_US
mus.identifier.categoryEngineering & Computer Scienceen_US
mus.relation.collegeCollege of Engineeringen_US
mus.relation.departmentComputer Science.en_US
mus.relation.universityMontana State Universityen_US
mus.contributor.orcidYang, Qing|0000-0002-0683-5848en_US

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