| IoV (Internet of Vehicles) has the important status in the intelligent transportation system, with the Internet of things has the very close relationship, which makes use of the sensor devices, automotive electronic device by car navigation system, mobile communication technology, information network platform service and intelligent terminal equipment such as tools, to realize real-time interaction information to cars, people, road, such as information for effective intelligent management, scheduling, measurement of the network system.IoV provides a variety of wireless mobile services, to support various types of intelligent transportation applications, because of the existing wireless network bandwidth resources are limited, bandwidth resources nervous phenomena often occur, and the rational use of bandwidth resource is particularly important, at the same time as the conflict and collision in the network can reduce the wireless network reliability, so wireless network available bandwidth measurement become a problem which need to be addressed.Bandwidth is link or path data transfer rate, with a bit rate measure its size, is one of the important parameters of network path, the development of bandwidth measurement tends to the improvement of network application and improvement of service quality, in the capacity allocation, service quality management, server routing, and other fields have a wide range of applications.In this paper, we explore for bandwidth measurement technology, introduces the bandwidth measurement technology, studied the bandwidth measurement algorithm, then studied in detail based on vehicle networking system needs two kinds of the available bandwidth measurement tools:Pathload and Pathchirp, their principle, algorithm and various parameters affect the in-depth analysis, and put forward a kind of based on dichotomy jump more wireless network available bandwidth adaptive detection method, the method using the dichotomy of ideas, not only can improve the wireless network available bandwidth measurement value of accuracy, can improve the reliability of jump more wireless network, reduce the network load and improve the performance of the network, allow the user to reasonable use of the available bandwidth, at the same time, can avoid to send too much data to make the network congestion. |
