A Novel Adaptive TDMA-Based MAC Protocol for VANETs

Cao, Shengbin; Lee, Victor C. S.

doi:10.1109/lcomm.2017.2785378

Cited by 58 publications

(26 citation statements)

References 4 publications

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“…In [16], a three-dimensional Markov chain-based analytical model was proposed to investigate the throughput performance of the drive-thru internet considering the impact of the access procedure. In [17], the authors proposed a TDMA-based scheme, which can ensure the fairness of channel access. However, their TDMA-based scheme is hardly compatible with the contention-based IEEE 802.11 networks.…”

Section: Related Workmentioning

confidence: 99%

Modeling and Analysis of Multichannel Drive-Thru Internet Systems and Performance Improvement

et al. 2020

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Recently, the interest regarding Drive-thru Internet systems has been rapidly arising in industrial and academic fields in view of the widespread adoption of IEEE 802.11 networks and its great potential to provide cost-effective Internet access. Drive-thru Internet systems are multiple-access wireless networks in which users in moving vehicles request/receive services such as digital map update and MP3 download to/from a Road Side Unit (RSU) as the vehicles pass through the coverage range of the RSU. For the purpose of efficiently supporting various services, Wireless Access in Vehicular Environment (WAVE), which is the standard for VANETs communications, specifies multichannel utilization, where the overall bandwidth is subdivided into seven channels, namely, one Control Channel (CCH) and six Service Channels (SCHs). However, originally designed for quasi-static single-channel-based small-scale indoor applications, the performance of IEEE 802.11 in the outdoor vehicular environment, where a large number of fast-moving vehicles simultaneously contend for channel access in the multichannel environment, is still unclear. In this paper, a unified analytical framework is established to study the performance of multichannel Drive-thru Internet systems. Specifically, taking account of channel access contention of vehicles and power reception probability of an RSU, the message arrival rate at the RSU on the uplink channel (i.e., CCH) is derived. Then, a multiserver queueing model, which plays the role of a bridge connecting the uplink and downlink (i.e., SCHs) communications, is developed for the purpose of accurately capturing the dynamics of the multichannel environment. Based on the developed framework, it can be noticed that as the intensity of channel contention increases, the saturated throughput of SCHs decreases rapidly, and the system becomes unstable due to the reason that vehicles have to wait for a very large amount of time to receive the requested service messages, or even worse, cannot receive the messages before leaving the coverage of RSU. In order to keep the throughput at the maximum level regardless of the channel contention intensity while maintaining the system stability, we propose a centralized coordination mechanism. Simulation experiments are carried out to validate the accuracy of the developed analytical framework and the effectiveness of the proposed centralized coordination mechanism. INDEX TERMS performance modeling, performance analysis, Drive-thru network, IEEE 802.11 DCF, vehicular ad-hoc networks (VANETs).

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Section: Related Workmentioning

confidence: 99%

Modeling and Analysis of Multichannel Drive-Thru Internet Systems and Performance Improvement

et al. 2020

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“…In VeMAC each node must acquire exactly one slot in a frame to transmit data and slot allocation information of neighbors for implicit acknowledgement. Authors in [2] present a novel Adaptive TDMA based MAC (VAT-MAC) in VANET. In VAT-MAC, the frame length is adjusted based on the estimated number of competing nodes in the subsequent time frame, and the adjusted frame length will be announced in each frame.…”

Section: Introductionmentioning

confidence: 99%

A Permutation-Based Model for Analysis of Resource Allocation Overheads in Vehicular Ad Hoc Networks

Zhang

Shen

2021

IEEE Access

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This paper considers the theoretical limits of resource allocation overheads in vehicular ad hoc networks (VANET), where the resource allocation procedure may consume extensive system resources. A permutation-based model is proposed to analyze the overhead limits where the unordered resource allocation patterns are considered as a permutation process. The minimum bits to represent the resource allocation information can be derived based on the permutation-based model. The bipartite graph is applied to describe the resource reuse in the respective domains for practical scenarios, and the dynamicity is taken into consideration. The proposed permutation-based model is applied to analyze the resource allocation overheads of two typical resource allocation schemes in vehicular ad hoc networks: time-division multiple access (TDMA) and cluster-based algorithms. The proposed methodology provides new insights in tradeoff analysis between overheads and system efficiency when analyzing the capacity of vehicular ad hoc networks. INDEX TERMS Overhead, resource allocation, vehicular ad hoc networks, and theoretical limit.

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“…Compared with the related works, [12][13][14][15][16] the main contributions of this article are summarized as follows.…”

Section: Introductionmentioning

confidence: 99%

A logically centralized slotted ALOHA‐based scheme for broadcast services in vehicular ad hoc networks

Peng

Zhou

Du³

et al. 2020

Trans Emerging Tel Tech

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In the vehicular ad hoc networks, a slotted ALOHA-based scheme for effective broadcast services is essential to disseminate the control and safety packets since it can avoid the slot collision issues. Existing slotted ALOHA-based schemes, for example, VeMAC, simply abandon the conflicting slots for all the collided nodes, which leads to a high collision probability and low wireless resource utilization. To address this issue, a logically centralized slotted ALOHA-based (LC-SA) scheme is proposed in this article. Different from the traditional slotted ALOHA-based schemes, the proposed LC-SA scheme solves the slot release problem and improves the rate of successful channel access. In the LC-SA scheme, a control node is enabled to reserve time slots for its neighbor nodes. In this way, a collided node within the communication range of the control node will continue to acquire this time slot if a collision is implied, while other collided nodes out of range will release this time slot to prevent another collision. Simulation results in both perfect and imperfect channel conditions are presented. The LC-SA scheme is verified to have higher throughput than VeMAC, due to more a rapid channel access speed and fewer access collisions.

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A Novel Adaptive TDMA-Based MAC Protocol for VANETs

Cited by 58 publications

References 4 publications

Modeling and Analysis of Multichannel Drive-Thru Internet Systems and Performance Improvement

Modeling and Analysis of Multichannel Drive-Thru Internet Systems and Performance Improvement

A Permutation-Based Model for Analysis of Resource Allocation Overheads in Vehicular Ad Hoc Networks

A logically centralized slotted ALOHA‐based scheme for broadcast services in vehicular ad hoc networks

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