RAMC : A RSU-Assisted Multi-Channel Coordination MAC Protocol for VANET
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概要
- 論文の詳細を見る
Dedicated Short Range Communication (DSRC) employs one control channel for safety-oriented applications and six service channels for non-safety commercial applications. However, most existing multi-channel schemes require all neighboring vehicles periodically (e.g. every 100 milliseconds) tune to the control channel for a full update of safety-oriented data before they can switch to the service channels for non-safety services. The safety exchange interval increases with the increase of traffic density. Consequently, under high traffic densities, the service channels are often completely idle while the control channel is congested. We propose a RSU Assisted Multi-channel Coordination MAC (RAMC) protocol that fully utilizes all channels to provide simultaneous safety and non-safety communications. Within the radio range of a roadside unit (RSU), vehicles are free to tune to any service channel. The RSU monitors all the safety messages being transmitted in both the control and service channels. Periodically, the RSU broadcasts a consolidated traffic view report to all neighboring vehicles in all channels. Therefore, a vehicle can operate in a service channel as long as it needs to achieve high throughput for non-safety applications, while maintaining adequate and timely safety awareness. Our simulation results show that the proposed RAMC protocol consistently achieves very high percentage of non-safety usage, while maintaining high safety message delivery ratios in various traffic density conditions.
- 2011-01-01
著者
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Liu Kai
School Of Chemistry And Chemical Engineering Huazhong University Of Science And Technology
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Liu Kai
School Of Electronics And Information Engineering The Key Laboratory Of Embedded System And Service
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GUO Jinhua
Department of Computer and Information Science, University of Michigan-Dearborn
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LU Ning
School of Electronics and Information Engineering, The Key Laboratory of Embedded System and Service
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LIU Fuqiang
School of Electronics and Information Engineering, The Key Laboratory of Embedded System and Service
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WANG Xinhong
School of Electronics and Information Engineering, The Key Laboratory of Embedded System and Service
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WANG Ping
School of Electronics and Information Engineering, The Key Laboratory of Embedded System and Service
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Wang Ping
School Of Electronics And Information Engineering The Key Laboratory Of Embedded System And Service
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Guo Jinhua
Department Of Computer And Information Science University Of Michigan-dearborn
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Liu Fuqiang
School Of Electronics And Information Engineering The Key Laboratory Of Embedded System And Service
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Wang Xinhong
School Of Electronics And Information Engineering The Key Laboratory Of Embedded System And Service
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Lu Ning
School Of Electronics And Information Engineering The Key Laboratory Of Embedded System And Service
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