CAH-MAC: Cooperative ADHOC MAC for Vehicular Networks

Bharati, Sailesh; Zhuang, Weihua

doi:10.1109/jsac.2013.sup.0513042

Cited by 133 publications

(86 citation statements)

References 20 publications

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“…E-VeMAC [14] solved the parallel transmission problem in the Ve-MAC protocol [15] then modified by adding a collision flag [16]. Cooperative communications are one of many solutions to perform non cluster-based TDMA [17] [18]. Peng et al [19] purposed a cooperative and opportunistic TDMA transmission.…”

Section: Time Division Multiple Access (Tdma)mentioning

confidence: 99%

Pre-Emptive Traffic Management for a Cluster-Based TDMA System in Vehicular Communications

Prasetya¹,

Sheu²,

Basuki³

et al. 2017

JCC

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The IEEE 802.11p is a standard in a vehicular communication system, known as Wireless Access in Vehicular Environment (WAVE). An implementation of that standard as the MAC Protocol in a high-density of nodes in Vehicular Ad-Hoc Networks (VANETs) may create a performance drawback, in particular for packet loss and delay whenever collisions happen. Introducing Time Division Multiple Access (TDMA) schemes can improve the performance. However, TDMA scheduling is difficult to manage the case of high-density of traffic, the high mobility of vehicles, and dynamic network topology. This journal proposes a clustered-based TDMA by traffic priority in VANETs. The clustered traffic is defined as high and low traffic priority and embedded in TDMA MAC Header. The evaluation result obtained through NS3 Simulator shows that the proposed approach performed better in a high-density of nodes.

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Section: Time Division Multiple Access (Tdma)mentioning

confidence: 99%

Pre-Emptive Traffic Management for a Cluster-Based TDMA System in Vehicular Communications

Prasetya¹,

Sheu²,

Basuki³

et al. 2017

JCC

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“…Bharati and Zhuang propose in [40] a Cooperative ADHOC MAC protocol, with the aim of improving throughput for non-safety applications. The scheduling mechanism developed by the CAH-MAC protocol is based on distributed TDMA similar to the one in AD-HOC MAC in that the channel access time is divided into periodic frames and each frame is further divided into time slots.…”

Section: C) Cooperative Adhoc Mac (Cah-mac) For Vehicular Networkmentioning

confidence: 99%

A Survey and Analysis on TDMA Based MAC Protocols for VANETs

Batth¹

2017

IJRASET

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Vehicular Ad hoc Networks, known as VANETs, are deployed to decrease the probability of road accidents and to improve passenger comfort by allowing vehicles to exchange different kinds of data messages between the mobile vehicles and the installed infrastructure. VANETs facilitate improved traffic safety and efficiency. Each vehicle can exchange information to inform other vehicles about the current status of the traffic flow or a dangerous situation such as an accident. Moreover, traffic safety applications need a reliable communication scheme with minimal transmission collision, which leads to the need for an efficient and reliable MAC. Design MAC for VANETs is a complex task due to the high mobility of the nodes, the frequent changes in topology, the lack of an infrastructure, and various QoS requirements. In the past years, various Time Division Multiple Access (TDMA) based medium access control protocols have been proposed for VANETs in an attempt to assure that all the vehicles have sufficient time to send safety messages with minimum collisions and to reduce the end-to-end delay and the packet loss ratio. In this survey paper a qualitative comparison provided in order to improve the performance of TDMA-based MAC protocols for V2V communication and also focused on the detailed characteristics of these protocols, their benefits and limitations. Keywords: Ad hoc, DSRC, IEEE 802.11p, MAC Protocols, TDMA, QoS, V2V, V2I, VANET. I. INTRODUCTIONVehicular ad hoc networks (VANETs) are emerging as a promising technology for providing safety and comfort applications for vehicular transportation. VANETs are receiving growing attention from the research community and from the transportation industry because of their great potential to improve traffic safety on roads. They can also be used to improve traffic management conditions and to provide on-board infotainment such as Internet access, video streaming, etc. VANETs are an example of Mobile Ad hoc Networks (MANETs) but with their own specification: high node mobility with constrained movements and the mobile nodes have ample energy and computing power (i.e. Storage and processing) [1]. In VANETs, communications can either be between vehicles V2V (Vehicle To Vehicle) or between vehicles and roadside units V2I [2] (Vehicle to Infrastructure). The applications for V2V and V2I can be divided into the following three services: safety services, traffic management and useroriented services [3], [4]. Safety services have special requirements in terms of quality of service. In fact, bounded transmission delays as well as low access delays are mandatory in order to offer the highest possible level of safety. At the same time, useroriented services need a broad bandwidth. Medium Access Control will play an important role in satisfying these requirements. In VANETs, the nodes share a common wireless channel by using the same radio frequencies and therefore an inappropriate use of the channel may lead to collisions and a waste of bandwidth. Hence, channel sharing is the...

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“…Use of such a short ID reduces the MAC overhead. By receiving FIs from one-hop neighbors, a node can determine [15]: 1) its one-hop neighbors, 2) its two-hop neighbors, 3) each time slot owner in a frame. To contend for an unreserved time slot, a node listens to the channel for consecutive F time slots (not necessarily in the same frame), and then tries to reserves an unreserved time slot [5].…”

Section: Channel Accessmentioning

confidence: 99%

“…In the VeMAC, nodes moving in same directions are relatively stationary with respect to each other in a frame, thus the relative mobility among those nodes in a frame is negligible. Hence, the transmission fails just because of poor quality of wireless channel, and p s should be equal to p [15]. In the following, the paper calculates the successful transmission probability with cooperation communication in the current frame.…”

Section: Performance Analysismentioning

confidence: 99%