tailieunhanh - Intelligent Vehicle Technology And Trends Episode 1 Part 11

Tham khảo tài liệu 'intelligent vehicle technology and trends episode 1 part 11', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 182 Cooperative Vehicle-Highway Systems CVHS Applications Based on Roadside-to-Vehicle Communications The applications shown in Table can be implemented based on a fairly consistent set of communications parameters One-way communication Point-to-multipoint communication Transmission mode periodic Minimum frequency update rate 10 Hz Allowable latency 100 msec consistent with typical automotive sensor update rates Maximum required range of communication 250-300m. For intersection situations the infrastructure system obtains information about approaching vehicles using sensors and or DSRC including parameters such as their position velocity acceleration and turning status. Relevant data can then be transmitted to the host vehicle. Road surface and weather conditions can be transmitted to assist the vehicle system in optimally estimating braking distance. In these scenarios either the roadside system or the vehicle system can estimate collision risk and takes appropriate action. Applications Based on Vehicle-to-Vehicle Communications The V-V applications shown in Table can be implemented based on the same communications parameters as Table Selected DSRC Applications Based on Roadside-to-Vehicle Communications Application Function Data communicated Traffic signal Warns the driver to stop if a traffic signal is in Traffic signal status and timing violation warning the stop phase and the system predicts that the driver will be in violation based on vehicle speed and braking status Traffic signal stopping location Traffic signal directionality Road surface condition Weather condition Stop sign violation Warns the driver if the distance to the stop Stopping location warning sign and the speed of the vehicle indicate that a high level of braking is required to properly stop Directionality Road surface condition Weather conditions Stop sign Provides a warning to a vehicle entering an Vehicle position velocity movement assistance intersection after having stopped .