Understanding STDMA via computer simulation: feasibility to vehicular safety applications, configurations, and time synchronization errors

Lim, Jae-Han

doi:10.1186/s13638-016-0680-7

Cited by 2 publications

(2 citation statements)

References 35 publications

(83 reference statements)

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“…Slotted protocols, e.g., STDMA, MS ALOHA, RR ALOHA and UTRA TDD, show good scalability, high reliability, and fair use of chanel resources [8], [15]- [21]. However, these time slotted protocols require precise absolute time synchronization for time slot coordination [22]. 4) Security: is a significant concern in VANET.…”

Section: Significance and Requirements Of Time Synchronizationmentioning

confidence: 99%

GNSS Time Synchronization in Vehicular Ad-Hoc Networks: Benefits and Feasibility

Hasan

Feng

Tian

2018

IEEE Trans. Intell. Transport. Syst.

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Time synchronization is critical for the operation of distributed systems in networked environments. It is also demanded in vehicular ad-hoc networks (VANETs), which, as a special type of wireless networks, are becoming increasingly important for emerging cooperative intelligent transport systems. Global navigation satellite system (GNSS) is a proven technology to provide precise timing information in many distributed systems. It is well recognized to be the primary means for vehicle positioning and velocity determination in VANETs. However, GNSS-based time synchronization is not well understood for its role in the coordination of various tasks in VANETs. To address this issue, this paper examines the requirements, potential benefits, and feasibility of GNSS time synchronization in VANETs. The availability of GNSS time synchronization is characterized by almost 100% in our experiments in high-rise urban streets, where the availability of GNSS positioning solutions is only 80%. Experiments are also conducted to test the accuracy of time synchronization with 1-PPS signals output from consumergrade GNSS receivers. They have shown 30-ns synchronization accuracy between two receivers of different models. All these experimental results demonstrate the feasibility of GNSS time synchronization for stringent VANET applications.

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Section: Significance and Requirements Of Time Synchronizationmentioning

confidence: 99%

GNSS Time Synchronization in Vehicular Ad-Hoc Networks: Benefits and Feasibility

Hasan

Feng

Tian

2018

IEEE Trans. Intell. Transport. Syst.

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“…Besides 802.11p, other MAC protocols have been proposed for the IoV scenario, mainly based on a TDMA scheme, such as VeMAC, STDMA, VC-MAC, and DMMAC. [38][39][40][41] VeMAC assigns disjoint sets of time slots to vehicles moving in opposite direction and to RSUs. 38 In the proposed scheme, nodes acquire a time slot by listening the control channel.…”

Section: Introductionmentioning

confidence: 99%

A fuzzy control system for energy‐efficient wireless devices in the Internet of vehicles

et al. 2021

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Embedded systems are common in the Internet of Things domain: their integration in vehicles and mobile devices is being fostered in the Internet of vehicles (IoV). IoV has direct applications on intelligent transportation systems and smart cities. Besides basic requirements, such as ease of installation, cost-effectiveness, scalability, and flexibility, IOV applications need to guarantee energyefficient and good-quality communication. In fact, IoV implementations are commonly based on wireless nodes, which rely on a limited energy source; therefore, an efficient communication among the nodes is desirable to prolong the lifetime of the devices. In particular, the alternation of active and sleep states and the regulation of the transmission power represent two common approaches to save energy. Based on this strategy, an effective fuzzy control system is presented in the paper to manage power consumption and quality of services of IoV applications. Two fuzzy controllers increase the battery life while keeping a good throughput to workload ratio. This technique has been simulated with two leading technologies in IoV: IEEE 802.11b/g/n and IEEE 802.11p. Experimental results show a network lifetime improvement ranging from 30% to 40%, according to the adopted medium access control protocol.

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Understanding STDMA via computer simulation: feasibility to vehicular safety applications, configurations, and time synchronization errors

Cited by 2 publications

References 35 publications

GNSS Time Synchronization in Vehicular Ad-Hoc Networks: Benefits and Feasibility

GNSS Time Synchronization in Vehicular Ad-Hoc Networks: Benefits and Feasibility

A fuzzy control system for energy‐efficient wireless devices in the Internet of vehicles

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