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 |