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

Abstract

Recently, several researchers have proposed to employ self-organized time division multiple access (STDMA) as an alternative Medium Access Control (MAC) protocol of vehicular communications and have studied STDMA to verify its feasibility to vehicular safety applications. However, most of studies have mainly focused on comparing STDMA with enhanced distributed channel access (EDCA) and have several limitations to reveal the feasibility: (1) they have not considered time synchronization error and (2) they have evaluated STDMA with only a single set of configurable parameters. Thus, the feasibility of STDMA to vehicular safety applications still remains unexplored and is an open issue. In this paper, we examine the performances of STDMA to confirm two points: (1) whether or not STDMA is feasible to safety applications even with time synchronization error and (2) whether or not proper configuration really helps to improve the performances. Our simulation results corroborate that current form of STDMA is not feasible to vehicular safety applications and we can improve STDMA via proper parameter configurations.

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

“…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.…”

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

“…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.…”