Channel Access Probability in Unslotted IEEE 802.15.4 csma Under Correlated Clear Channel Assessments

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dc.article.number136671
dc.catalogadorgjm
dc.contributor.authorEspinoza Henríquez, Miguel Antonio
dc.contributor.authorOberli Graf, Christian Robert
dc.contributor.authorGutiérrez Gaitán, Miguel José
dc.contributor.authorMaass Martínez, Alejandro Ignacio
dc.date.accessioned2025-08-29T14:38:52Z
dc.date.available2025-08-29T14:38:52Z
dc.date.issued2025
dc.description.abstractCorrelation between successive clear channel assessments in unslotted carrier sense multiple access with collision avoidance (CSMA/CA) is commonly assumed in the literature to be negligible for modeling the medium access control algorithm. However, in previous research, the authors found this assumption to be questionable under certain realistic conditions. In this paper, the correlation between successive clear channel assessments is studied and its effect on the probability and delay of accessing the medium by a node following the IEEE 802.15.4 Standard is modeled for the unslotted CSMA/CA mode. The results obtained are used for evaluating the delay probability distributions of the three outcome events of the CSMA/CA algorithm: frame transfer success, channel access failure and frame transfer failure. For scenarios in which the duration of contentions is similar to, or shorter than, the duration of the frames propagating in the air, the correlation effect is strong, making classical models to yield results that deviate from a realistic scenario. The theoretical results are validated by simulations. It is shown that neglecting correlation between successive clear channel assessments leads to overestimating the expected delay of frame transfer success and channel access failure by up to 15%. The results also reveal that the probability of frame transfer success can be overestimated by up to 30%, the probability of frame transfer failure by up to 80% and the probability of channel access failure is underestimated by up to a factor 6 when clear channel assessment correlation is ignored.
dc.fechaingreso.objetodigital2025-08-29
dc.format.extent16 páginas
dc.fuente.origenORCID
dc.identifier.doi10.1109/ACCESS.2025.3593810
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/105363
dc.identifier.urihttps://doi.org/10.1109/ACCESS.2025.3593810
dc.information.autorucEscuela de Ingeniería; Espinoza Henríquez, Miguel Antonio; S/I; 1065119
dc.information.autorucEscuela de Ingeniería; Oberli Graf, Christian Robert; 0000-0003-3068-096X; 63125
dc.information.autorucEscuela de Ingeniería; Gutiérrez Gaitán, Miguel José; 0000-0002-3307-8731; 1352133
dc.information.autorucEscuela de Ingeniería; Maass Martínez, Alejandro Ignacio; S/I; 1352967
dc.language.isoen
dc.nota.accesocontenido completo
dc.revistaIEEE Access
dc.rightsacceso abierto
dc.rights.licenseCC BY-NC-ND 4.0 Attribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectAccess protocols
dc.subjectDelay estimation
dc.subjectProbability distribution
dc.subjectWireless mesh networks
dc.subject.ddc620
dc.subject.deweyIngenieríaes_ES
dc.titleChannel Access Probability in Unslotted IEEE 802.15.4 csma Under Correlated Clear Channel Assessments
dc.typeartículo
dc.volumen13
sipa.codpersvinculados1065119
sipa.codpersvinculados63125
sipa.codpersvinculados1352133
sipa.codpersvinculados1352967
sipa.trazabilidadORCID;2025-08-22
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