System of dynamically adjusting generation frequency of messages in vehicular networks and method thereof

摘要

A method of dynamic adjusting a generation frequency of messages in vehicular networks is provided, including: receiving updating requests and emergent degree of the vehicle event, and then determining whether the generation frequency of messages meets the dynamic change of the vehicle, if not satisfied, selecting a different adjustment method according to the event emergent degree. When the event is emergent, its generation frequency can be raised immediately by an interruptive adjustment and to suppress the generation frequency of messages of the others. Conversely, adjusting its generation frequency by a progressive adjustment and reducing the generation frequency of messages of the other lower-priority vehicles. According to the present disclosure, it prevents lower priority messages from occupying the channel overly, and emergency messages with higher priority can be satisfied immediately when it needed.

主权项

1. A system of dynamically adjusting a generation frequency of messages in vehicular networks arranged in a carrier, comprising:
a message receiver configured for receiving a message priority and a minimum update frequency of messages from an application and an event indication generated by the carrier when moving dynamically; and a processor configured for determining whether a generation frequency of messages of the carrier meets the minimum update frequency and generating a frequency adjustment instruction when the generation frequency does not meet the minimum update frequency; determining whether the event indication is an emergent event after receiving the frequency adjustment instruction, and generating an interruptive adjustment instruction when the event indication is determined to be the emergent event, or a progressive adjustment instruction when the event indication is determined to be not the emergent event; and adjusting the generation frequency based on the interruptive adjustment instruction or the progressive adjustment instruction, wherein the processor, based on the progressive adjustment instruction, reduces a generation frequency of messages of another carrier, detects a channel load of a message transmitting channel in the carrier, and adjusts the generation frequency based on the channel load, and wherein the processor, based on the interruptive adjustment instruction, adjusts the generation frequency to be no lower than the minimum update frequency, and reduces a generation frequency of messages of another carrier according to one or more channel access parameters which are set based on the message priority.