On the Impact of Multi-Channel Technology on Safety-Message Delivery in IEEE 802.11p/1609.4 Vehicular Networks

Felice, Marco Di; Ghandour, Ali; Artail, Hassan; Bononi, Luciano

doi:10.1109/icccn.2012.6289273

Cited by 18 publications

(12 citation statements)

References 11 publications

(15 reference statements)

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“…For example, in [20], Hong et al investigated the performance of safety-related applications and proposed slight modifications to the IEEE 1609.4 standard to improve it. A similar study has been conducted by Di Felice et al in [7], which proposed a modification of the MAC procedures to mitigate the influence of the switching mechanism. In [31] Wang and Hassan instead evaluated the 1609.4 capacity to support non-safety related DSRC traffic.…”

Section: Channel Switching Principlesmentioning

confidence: 56%

Multi-Channel Operations, Coexistence and Spectrum Sharing for Vehicular Communications

Härri

Kenney

2015

Vehicular Ad Hoc Networks

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DSRC has been allocated (three in EU, seven in US) dedicated channels at 5.9 GHz for vehicular communications. Although resource allocations on the common control channel (CCH) reserved for safety-related applications have been well investigated, efficient usage of the other SCHs is less developed. With new ITS safety-related applications appearing, such as autonomous driving or truck platooning, as well as the expected coexistence between ITS and non-ITS technologies for smart mobility applications, operating on multiple channels and efficiently sharing the ITS spectrum become critical. First, multi-channel operations aim at mitigating the communication load on specific channels by offloading part of traffic to alternate channels. Second, multi-channel operations aim at providing mechanisms to dynamically change channels and fit to the service requirements as function of external interferences or to varying traffic conditions. In this chapter, we describe the regulations and mechanisms for ITS multi-channel operation and coexistence in the US and in the EU. We first provide an overview of the frequency allocations and access restrictions for ITS, and then describe the protocols available in standards and R&D for multi-channel operations.

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Section: Channel Switching Principlesmentioning

confidence: 56%

Multi-Channel Operations, Coexistence and Spectrum Sharing for Vehicular Communications

Härri

Kenney

2015

Vehicular Ad Hoc Networks

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“…This problem arises because of limited bandwidth of DSRC channels. The cognitive radio and dynamic spectrum access solutions discussed by Di Felice et al (2012b) seem to be suitable approaches to increase the DSRC bandwidth for safety-applications. El Ajaltouni et al (2013) propose an efficient multichannel QoS cognitive MAC (MQOG) protocol.…”

Section: Protocol Enhancement In Transmission Operations At the Mac Lmentioning

confidence: 99%

Clustering-based enhanced safety message dissemination medium access control protocol for vehicular ad hoc network

Gupta

Prakash

Tripathi

2017

IJAHUC

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Wireless access in vehicular environment employs the IEEE 802.11p/1609.4 standard wherein a multichannel architecture is envisioned to concurrently support both time-sensitive safety-related applications and value-added entertainment services. Although a standard now, the IEEE 802.11p protocol has known shortcomings of not being capable of providing reliable broadcast services. To address this issue, clustering-based enhanced safety message dissemination MAC protocol (CESD-MAC) is proposed in this paper which is an enhancement over the existing IEEE 802.11p/1609.4 protocol. CESD-MAC adopts mobility aware clustering and channel access scheduling. It rules out the concept of switching between the control channel and the service channel as implemented in the legacy standard. Simulation results are presented to verify the effectiveness of the proposed protocol and comparisons are made with the existing IEEE 802.11p MAC. The results demonstrate the superiority of CESD-MAC in terms of reduction of end-to-end delay, and increased throughput, channel utilisation and packet delivery ratio (PDR).Keywords: channel switching; clustering; contention window; DSRC; dedicated short-range communications; IEEE WAVE 1609.4; IEEE 802.11p; MAC; medium access control; multichannel; QoS; quality of service; safety; V2V; vehicle-to-vehicle; VANET; vehicular ad hoc network.Reference to this paper should be made as follows: Gupta, N., Prakash, A. and Tripathi, R. Arun Prakash received his BE from the

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“…For instance, the authors of [4] have proposed to introduce random delays in the backoff process in order to distribute the transmissions over all the CCH interval. Similar, in [5] we have described a distributed scheme that enables each vehicle to adjust its Contention Window (CW) size at the MAC layer based on the actual traffic load on the CCH. However, while increasing the CW size at MAC layer can be considered an effective solution to reduce the probability of synchronous collisions, it might also increase the channel access delay in high load network scenarios, so that some packets might be discarded because of the end of the CCH interval.…”

Section: Ieee 80211p/16094 Enhancementsmentioning

confidence: 99%

DySCO

Felice

Bedogni

Bononi

2012

Proceedings of the 10th ACM International Symposium on Mobility Management and Wireless Access

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Recently, the IEEE 1609.4 protocol has been defined to enable multi-channel operations in a vehicular environment, and to guarantee interference-free co-existence of safety-related and non-safety related applications in the same network. To meet these goals, the protocol assumes strict time synchronization among vehicles, and time/frequency separation in the Dedicated Short Range Communication (DSRC) band. However, recent studies have demonstrated that this approach might not be suitable for safety-related broadcast applications with strict Quality-of-Service (QoS) requirements. In this paper, we investigate the potentials of Cognitive Radio (CR) technology to enhance the delivery ratio of safety-related broadcast applications in a multi-channel vehicular scenario. In this research field, we propose three novel contributions: (i) we introduce an analytical model to study the delivery ratio of broadcast applications in IEEE 802.11p/1609.4 multi-channel vehicular networks, and the impact of MAC and PHY parameters on the system performance; (ii) we propose a framework to jointly decide the optimal values of the Contention Window size (CW) at the MAC layer and of the Control CHannel (CCH) bandwidth at PHY layer, so that each vehicle is able to transmit all its safety data during the CCH interval with a minimum MAC collision probability, and (iii) we discuss the framework implementation in a realistic vehicular scenario. Our on-demand bandwidth allocation algorithm utilizes vacant frequencies in the DSRC band to increase the bandwidth of the CCH, leveraging the spectrum agile capabilities offered by the CR technology. Simulation results confirm the effectiveness of our proposal in enhancing the delivery rate of broadcast applications under varying network scenarios and load conditions.

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On the Impact of Multi-Channel Technology on Safety-Message Delivery in IEEE 802.11p/1609.4 Vehicular Networks

Cited by 18 publications

References 11 publications

Multi-Channel Operations, Coexistence and Spectrum Sharing for Vehicular Communications

Multi-Channel Operations, Coexistence and Spectrum Sharing for Vehicular Communications

Clustering-based enhanced safety message dissemination medium access control protocol for vehicular ad hoc network

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