Decentralized Congestion Control Techniques for VANETs

Smely, Dieter; Rührup, Stefan; Schmidt, Robert; Kenney, John B.; Sjöberg, Katrin

doi:10.1007/978-3-319-15497-8_6

Cited by 9 publications

(4 citation statements)

References 12 publications

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“…A number of parameters can be modified in order to impact on the channel occupation. Among them, those that are mostly considered are power, packet rate generation, and data-rate [4], [16].…”

Section: B Modified Parametersmentioning

confidence: 99%

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Congestion Control Mechanisms in IEEE 802.11p and Sidelink C-V2X

Bazzi

2019

2019 53rd Asilomar Conference on Signals, Systems, and Computers

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1 Connected vehicles are expected to play a major role in the next future to improve safety and traffic efficiency on the road and short-range technologies have been defined to enable the direct exchange of information. To this aim, two solutions are currently the subject of a debate that goes beyond the technician, i.e., IEEE 802.11p and sidelink cellular-vehicle-to-anything (C-V2X). Tested and mature for deployment the first, possibly more efficient the second. In both cases, one of the main aspects is the management of channel congestions, which can cause serious packet losses and have a critical impact on the reliability of applications. Congestions can be managed through different approaches, including the control of transmission power, packet generation frequency, and the adopted modulation and coding scheme. Congestion management has been well studied in IEEE 802.11p, with consolidated algorithms included in the standards, whereas it appears somehow as a new topic looking at C-V2X. In this work, a review of the main congestion control mechanisms and a discussion of their applicability and efficiency in the two technologies is provided. This topic is addressed without focusing on specific algorithms and with the aim to provide general guidelines as a starting point for new proposals.

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Section: B Modified Parametersmentioning

confidence: 99%

“…Congestion control algorithms have thus been defined to modify some parameters before the conditions become critical [4]. Several options have been considered for this scope, among which the main ones are acting on the transmission power, beacon frequency, and datarate.…”

Section: Introductionmentioning

confidence: 99%

Congestion Control Mechanisms in IEEE 802.11p and Sidelink C-V2X

Bazzi

2019

2019 53rd Asilomar Conference on Signals, Systems, and Computers

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“…Some studies focus on the comparison between the Cellular-V2X Mode 4 and IEEE 802.11p standards, such as DSRC or ITS-G5 [25], [26], [27], and [28].…”

Section: A Related Workmentioning

confidence: 99%

Congestion Control in Autonomous Resource Selection of Cellular-V2X

Sabeeh

Wesołowski

2023

IEEE Access

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Intelligent transportation systems have recently become a promising technology for future industry to provide safe, green, and automated driving. In this regard, the Third Generation Partnership Project (3GPP) has proposed to utilize cellular communication to enable direct communication between vehicles with and without cellular infrastructure assistance. 3GPP has introduced the Sensing-Based Semi-Persistent Scheduling (S-SPS) technique when coverage of the cellular system is absent. S-SPS faces resource collision and performance degradation problems when channel load increases in the network. This paper suggests a decentralized congestion control and transmission power control mechanism (TPC-DCC) with an adaptive threshold for the received signal as a combination method to decrease channel load in the network. Furthermore, this work introduces a novel channel load adjustment. The new adjusting algorithm is based on a constant difference between the upper and lower boundaries of channel load at each level to handle channel overload and provide more flexibility using DCC mechanisms. The interactions of the proposed algorithm with S-SPS and the Extended-Estimation Reservation Resource Allocation (E-ERRA) algorithms that the authors previously proposed are investigated. The results indicate that system performance can be substantially improved when the transmission power and reception threshold are adaptively adjusted to the proposed channel load adjustment. The results of E-ERRA with the proposed channel load adjustment method show promising results compared to S-SPS.INDEX TERMS C-V2X, decentralized congestion control, resource collision, S-SPS, E-ERRA. I. INTRODUCTIONIntelligent transportation systems and automated vehicles will soon be an essential part of future technologies used every day. For many years, dedicated short-range communications (DSRC) based on the IEEE 802.11p standard have been used as the only solution that supports vehicular communication [1]. 3GPP in Release 14 standardized new advanced LTE features to enable basic safety applications using direct information exchange through the SideLink (SL) communication link. SL communication takes place between vehicles themselves and between vehicles and surrounding nodes, such as roadside units, cellular and road infrastructure, and cellular devices. Vehicle communication can be supported by cellular infrastructure or not [2]. This technology is known as Cellular-Vehicle-to-Everything (C-V2X) orThe associate editor coordinating the review of this manuscript and approving it for publication was Hassan Omar .

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“…Neighboring UEs listen to this information at CP time and allocate resources other than the informed resources. CSMA/CA is used to transmit RR and RG, but CSMA/CA is not suitable in an environment with a high density of UEs [26], [27], where the competition window is not easily adjusted, and a long competition window lowers the channel efficiency. Besides, the authors did not consider the error rates of RR and RG.…”

Section: Related Workmentioning

confidence: 99%

Evolved Wireless ad Hoc Network: Design and Operating Principle for Wireless Resource Management of Mobile Terminals

Hwang

Ahn

2022

IEEE Access

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This paper proposes an evolved wireless ad hoc network (WANET) in which user equipment (UE) can manage radio resources by itself without the control by infrastructure. There are two independent channels in the proposed WANET, one is a data channel, the other is a tone channel for resource management. UEs allocate, occupy, and return resources by using tones in the tone channel. Although UEs do not exchange channel information with each other, they are able to occupy a clear one-hop area without a hidden node problem by setting the data communication area and the tone communication area differently. A UE occupying a resource performs a real time collision check on the occupied resource, and if a collision is detected, it is able to re-occupy a resource without collision. In this paper, we present the operating principle of the proposed WANET, and design its communication area, and analyze the average resource occupation time. Since the proposed WANET operates in a general communication environment that is not limited to special assumptions, it supports periodic and aperiodic communication and broadcast links and unicast links without hidden node problem, and could be utilized to various communication fields such as drones, vehicles, ships, and smartphones.INDEX TERMS Ad hoc networks, hidden node, medium access control, packet collision resolution.

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Decentralized Congestion Control Techniques for VANETs

Cited by 9 publications

References 12 publications

Congestion Control Mechanisms in IEEE 802.11p and Sidelink C-V2X

Congestion Control Mechanisms in IEEE 802.11p and Sidelink C-V2X

Congestion Control in Autonomous Resource Selection of Cellular-V2X

Evolved Wireless ad Hoc Network: Design and Operating Principle for Wireless Resource Management of Mobile Terminals

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