| 摘要 |
<p>Disclosed is a method for improving an coverage area where security information about the Internet of Vehicles is broadcasted, comprising designing a method for a non-uniform backoff-window restraint sequence X r to dynamically adjust initial value selection probability of a backoff-window of forwarding nodes at different distances from a source node, and conditions that the restraint sequence X r is required to satisfy in a practical security-information forwarding application scenario; according to the relative distance D r between a forwarding node and the source node, calculating a distance restraint factorγr , and constructing the restraint sequence X r through theγr ; and with the restraint of the restraint sequence X r , each forwarding node generating an initial value for a respective backoff-window, then initializing a backoff-window counter initial value to enter a backoff process, so as to realize access control to shared media. The present invention has the advantage of achieving the purpose of improving an effective coverage area where security information is multi-hop broadcasted in a CCH channel time-slot, by means of improving the probability of forwarding a data packet by a node with a relatively far distance in a time-slot unit within a one-hop range of a source node.</p> |
