Evaluation of Multi-Channel Schemes for Vehicular Safety Communications

Hong, Kezhu; Kenney, John B.; Rai, Vinuth; Laberteaux, Kenneth P.

doi:10.1109/vetecs.2010.5494185

Cited by 19 publications

(7 citation statements)

References 4 publications

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“…Techniques to solve this problem have been broadly studied. Kenney et al [26] propose a new design of WAVE 1609.4 protocol, which includes an extra bit in the packet header to show the nodes' intention to keep staying on CCH or to operate on multi-channels. This work enables the co-existence between single radio nodes and multi-radio nodes and guarantees the reliability of safety related messages.…”

Section: Algorithms Improving Dsrc Performance and Reliabilitymentioning

confidence: 99%

Solving the performance puzzle of DSRC multi-channel operations

Xiong

Chen

Rao

et al. 2015

2015 IEEE International Conference on Communications (ICC)

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The key goal of our work is to provision sufficient reliability for real-time safety messages in CCH while optimising non-safety service delivery in SCH. We have developed analytical models for both broadcasting and unicasting to explore the relationship among traffic density, CCH packet loss ratio, SCH throughput, and the duration of each kind of intervals.Unlike assigning fixed channel interval in error-prone default channel access approach, we develop a multi-channel coordination algorithm which adaptively adjusts the duration of intervals to achieve better performance and reliability based on these models. Theoretical analysis and extensive simulation results demonstrate the accuracy of our model and the efficacy of the proposed algorithm. The algorithm almost doubles SCH throughput in low traffic density scenario and reduces packet loss ratio by up to 30%. We also show that the proposed algorithm converges rapidly to the optimal channel interval division. Many thanks go to Dr. Lei Rao, for her time to organize weekly meeting to discuss this project and her constructive and insightful comments on my work.

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Section: Algorithms Improving Dsrc Performance and Reliabilitymentioning

confidence: 99%

Solving the performance puzzle of DSRC multi-channel operations

Xiong

Chen

Rao

et al. 2015

2015 IEEE International Conference on Communications (ICC)

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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.…”

Section: Channel Switching Principlesmentioning

confidence: 99%

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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“…The impact of fixed ratio between CCH and SCH on network performance is discussed in [17,18] concluding that this fixed ratio is a bottleneck for throughput under varying traffic conditions. The main objective of this paper involves dynamically varying the multichannel access scheduling to achieve optimal performance and to provide an interference free network for the propagation of event driven messages.…”

Section: Channel Switching Between Cch and Schmentioning

confidence: 99%