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Modeling the medium access control layer performance of cellular vehicle-to-everything mode 4 and IEEE 802.11p

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dc.contributor.advisor Samarasinghe T
dc.contributor.author Priyankara WNBAG
dc.date.accessioned 2021
dc.date.available 2021
dc.date.issued 2021
dc.identifier.citation Priyankara, W.N.B.A.G. (2021). Modeling the medium access control layer performance of cellular vehicle-to-everything mode 4 and IEEE 802.11p [Doctoral dissertation, University of Moratuwa]. Institutional Repository University of Moratuwa. http://dl.lib.uom.lk/handle/123/22206
dc.identifier.uri http://dl.lib.uom.lk/handle/123/22206
dc.description.abstract The capability of vehicle-to-everything (V2X) communication to wirelessly exchange information on speed and location of vehicles over an ad hoc network envisions promise substantially reducing vehicle collisions, congestion, fuel usage and pollution. V2X communication plays a pivotal role in intelligent transport systems (ITS), with IEEE 802.11p and cellular V2X (C-V2X) being the two competing enabling technologies. This thesis focuses on discrete-time Markov chain (DTMC) based modeling of the medium access control (MAC)-layer performance of the two enabling technologies for evalua- tion, comparison and enhancement. Firstly, DTMC-based models for the MAC layer operations of IEEE 802.11p and C-V2X Mode 4 are developed, considering periodic and event-driven messages. The results show that IEEE 802.11p is superior in average delay, whereas C-V2X Mode 4 excels in collision resolution, which leads to its higher throughput. Then, the models are extended to support the parallel operation of four multi-priority data streams, which are crucial for quality of service (QoS). Results show that IEEE 802.11p is superior in maintaining fairness among multi-priority data streams. It is also shown that the higher delay values in C-V2X lead to unfavorable packet delays in the low priority streams. The thesis studies the allocation of multiple candidate single-subframe resources (CSRs) per vehicle as a solution. It proposes a methodology to determine the number of CSRs for each vehicle based on the number of total vehicles, and to assign the multiple data streams for simultaneous transmission. The numerical results highlight the achievable delay gains of the proposed approach and its negligible impact on packet collisions. en_US
dc.language.iso en en_US
dc.subject C-V2XMODE 4 en_US
dc.subject IEEE 802.11P en_US
dc.subject DISCRETE-TIMEMARKOV CHAIN en_US
dc.subject MEDIUM ACCESS CONTROL en_US
dc.subject MULTI-PRIORITY DATA STREAMS en_US
dc.subject ELECTRONIC & TELECOMMUNICATION ENGINEERING – Dissertation en_US
dc.title Modeling the medium access control layer performance of cellular vehicle-to-everything mode 4 and IEEE 802.11p en_US
dc.type Thesis-Full-text en_US
dc.identifier.faculty Engineering en_US
dc.identifier.department Department of Electronics and Telecommunication Engineering en_US
dc.date.accept 2021
dc.identifier.accno TH5137 en_US


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