Cognitive Radio Enabled Multi-Channel Access for Vehicular Communications

—The IEEE 1609.4 standard has been proposed to provide multi-channel operations in wireless access for vehicular environments (WAVE), where all the channels are periodically synchronized into control and service intervals. The communication device in each vehicle will stay at the control channel for negotiation and contention during the control interval, and thereafter switch to one of the service channels for data transmission in the service interval. The inefficiency of WAVE system comes from the fact that half of the time intervals of the service channels remain idle since all the stations are performing message contention within the control channel. In this paper, the cognitive radio-enabled multi-channel access (CREM) protocol is proposed to increase the channel utilization of IEEE 1609.4 standard. Based on the concept of cognitive radio, the vehicular stations are categorized into primary stations with safety-related messages and secondary stations with non-safety information ...

• Type: Journal
• Year: 2010
• Where: VTC
• Authors: Jui-Hung Chu, Kai-Ten Feng, Chen-Nee Chuah, Chin-Fu Liu
• Keywords: Channel Utilization, Communications, IEEE 1609.4 Standard, Time Intervals, VTC 2010