Impact of Platoon Size on the Performance of TDMA-Based MAC Protocols

Aslam, Aqsa; Almeida, Luís; Santos, Frederico

doi:10.1109/glocomw.2018.8644433

Cited by 3 publications

(5 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our analysis in [19], we observed that relationships between network performance metrics and the number of vehicles in a platoon could be captured and described by empirical models. Such results motivated our interest in searching for a wider range of empirical relationships between network topology and performance metrics, to provide information to application designers.…”

Section: Motivation and Methodology For Empirical Models Of Mac Protomentioning

confidence: 97%

“…In previous work [19], we reported network performance in a highway platooning scenario (such as that of Figure 2) when only coordinated beaconing traffic exists, i.e., no other data or control flows existed apart from periodic beacons transmitted by platoon members. Periodic beaconing is a network functionality that is often explored to enable safety and infotainment applications, and it is provided by design by the two regional protocol stacks, with beacons being called cooperative awareness messages (CAM) in ETSI ITS-G5 [9] and basic safety messages (BSM) in WAVE [8].…”

Section: Motivation and Methodology For Empirical Models Of Mac Protomentioning

confidence: 99%

“…Note that, among all protocols reviewed in the previous section, these are the only ones that are readily available or implementable on commercial off-the-shelf (COTS) IEEE 802.11p network interfaces, without need for any hardware or device-modifications. We review briefly the operation of these protocols in the following section, and then review the conclusions reported in [19] that sustain our approach of producing empirical models.…”

Section: Motivation and Methodology For Empirical Models Of Mac Protomentioning

confidence: 99%

“…In [19], we presented vehicular simulations to explore the behaviour of relevant network performance metrics, namely the rate of collisions and the ratio of medium accesses during which the medium was busy (after [24]), with the three aforementioned protocols, i.e., CSMA/CA, PLEXE-slotted and RA-TDMAp. The studied scenario encompassed 16 platoons travelling side-by-side in four parallel lanes at the same speed.…”

Section: Network Metrics As a Function Of Scenariomentioning

confidence: 99%

“…The observations reported in the following section were obtained from simulations in the discrete event simulator OMNeT++, paired with the road traffic simulator SUMO, the vehicular IEEE 802.11p simulation framework Veins [25] and the Veins extension for platooning, PLEXE [24]. As in [19], we have simulated a stretch of a 10 km of a highway with five lanes where (only) 16 platoons travel. The speed of all the platoons is set to 100 km/h and the length of each car is 4 m long.…”

Section: Global Metricmentioning

confidence: 99%

See 4 more Smart Citations

Empirical Performance Models of MAC Protocols for Cooperative Platooning Applications

Aslam

Santos

et al. 2019

Electronics

Self Cite

View full text Add to dashboard Cite

Vehicular ad-hoc networks (VANET) enable vehicles to exchange information on traffic conditions, dynamic status and localization, to enhance road safety and transportation efficiency. A typical VANET application is platooning, which can take advantage of exchanging information on speed, heading and position to allow shorter inter-vehicle distances without compromising safety. However, the platooning performance depends drastically on the quality of the communication channel, which in turn is highly influenced by the medium access control protocol (MAC). Currently, VANETs use the IEEE 802.11p MAC, which follows a carrier sense multiple access with collision avoidance (CSMA/CA) policy that is prone to collisions and degrades significantly with network load. This has led to recent proposals for a time-division multiple access (TDMA)-based MAC that synchronize vehicles’ beacons to prevent or reduce collisions. In this paper, we take CSMA/CA and two TDMA-based overlay protocols, i.e., deployed over CSMA/CA, namely PLEXE-slotted and RA-TDMAp, and carry out extensive simulations with varying platoon sizes, number of occupied lanes and transmit power to deduce empirical models that provide estimates of average number of collisions per second and average busy time ratio. In particular, we show that these estimates can be obtained from observing the number of radio-frequency (RF) neighbours, i.e., number of distinct sources of the packets received by each vehicle per time unit. These estimates can enhance the online adaptation of distributed applications, particularly platooning control, to varying conditions of the communication channel.

show abstract

Section: Motivation and Methodology For Empirical Models Of Mac Protomentioning

confidence: 97%

Section: Motivation and Methodology For Empirical Models Of Mac Protomentioning

confidence: 99%

Section: Motivation and Methodology For Empirical Models Of Mac Protomentioning

confidence: 99%

Section: Network Metrics As a Function Of Scenariomentioning

confidence: 99%