Radio apparatus, processing apparatus and processing system

Abstract

A first determination unit provisionally determines collision or non-collision between a vehicle and another vehicle on the basis of positional information of the vehicle and positional information of the other vehicle. A second determination unit changes a determination result to collision when the provisional determination result has been collision N times in succession and when the determination result was previously non-collision, and changes the determination result to non-collision when the provisional determination result has been non-collision M times in succession and when the determination result was previously collision. Here, N is smaller than M. N and M are positive integral numbers.

What is claimed is: 
     
         1 . A radio apparatus configured to be mounted in a vehicle, comprising:
 an acquirer configured to acquire at least one of first positional data of the vehicle;   a receiver configured to receive at least packet signals from another radio apparatus, each of the at least packet signals including at least one of second positional data of another vehicle in which the another radio apparatus is mounted, wherein   the radio apparatus firstly determines each of provisional collisions and each of provisional non-collisions between the vehicle and the another vehicle on the basis of one of the at least one of the first positional data and one of the at least one of the second positional data, and   the radio apparatus secondly determines a collision or a non-collision between the vehicle and the another vehicle based on at least two of the provisional collisions and/or at least two of the provisional non-collisions.   
     
     
         2 . The radio apparatus according to  claim 1 , wherein after the radio apparatus secondly determines the non-collision, the radio apparatus changes the second determination result to the collision when the radio apparatus determines the provisional collisions N times in succession. 
     
     
         3 . The radio apparatus according to  claim 2 , wherein
 after the radio apparatus secondly determines the collision, the radio apparatus changes the second determination result to non-collision when the radio apparatus determines the provisional non-collisions M times in succession, and   N is smaller than M in the second determiner.   
     
     
         4 . The radio apparatus according to  claim 3 , wherein N and M are positive integral numbers. 
     
     
         5 . The radio apparatus according to  claim 1 , wherein after the radio apparatus secondly determines the non-collision, the radio apparatus changes the second determination result to the collision when a ratio of the provisional collisions to the first determination results exceeds a first threshold value. 
     
     
         6 . The radio apparatus according to  claim 5 , wherein
 after the radio apparatus secondly determines the collision, the radio apparatus changes the second determination result to the non-collision when a ratio of the provisional non-collisions in the first determination results exceeds a second threshold value, and   the first threshold value is smaller than the second threshold value in the second determiner.   
     
     
         7 . A process apparatus, comprising:
 an acquirer that acquires a first determination result regarding each of provisional collisions or each of provisional non-collisions between a first vehicle and a second vehicle, which are determined on the basis of i) one of at least one of first positional data of a first vehicle in which a first radio apparatus is mounted and ii) one of at least one of second positional data of a second vehicle that is included in a packet signal that is received from a second radio apparatus mounted in the second vehicle by the first radio apparatus and that at least includes at least one of second positional data of the second vehicle, wherein   the process apparatus secondly determines a collision or a non-collision between the first vehicle and the second vehicle based on at least two of the provisional collisions and/or at least two of the provisional non-collisions.   
     
     
         8 . The process apparatus according to  claim 7 , wherein the acquirer includes
 an inputter that inputs the one of at least one of first positional data and the one of at least one of second positional data, and   a provisional determiner that firstly determines each of the provisional collisions or each of the provisional non-collisions between the first vehicle and the second vehicle on the basis of the one of at least one of first positional data and the one of at least one of second positional data.   
     
     
         9 . The process apparatus according to  claim 7 , wherein after the process apparatus secondly determines the non-collision, the process apparatus changes the second determination result to the collision when the process apparatus determines the provisional collisions N times in succession. 
     
     
         10 . The process apparatus according to  claim 9 , wherein
 after the radio apparatus secondly determines the collision, the process apparatus changes the second determination result to non-collision when the process apparatus determines the provisional non-collisions M times in succession, and   N is smaller than M in the second determiner.   
     
     
         11 . The process apparatus according to  claim 10 , wherein N and M are positive integral numbers. 
     
     
         12 . The process apparatus according to  claim 7 , wherein after the process apparatus secondly determines the non-collision, the process apparatus changes the second determination result to the collision when a ratio of the provisional collisions to the first determination results exceeds a first threshold value. 
     
     
         13 . The process apparatus according to  claim 12 , wherein
 after the process apparatus secondly determines the collision, the process apparatus changes the second determination result to the non-collision when a ratio of the provisional non-collisions in the first determination results exceeds a second threshold value, and   the first threshold value is smaller than the second threshold value in the second determiner.   
     
     
         14 . A process system, comprising:
 a first radio apparatus that is mounted in a first vehicle, and   a process apparatus that is connected to the first radio apparatus, wherein   the radio apparatus includes   an acquirer configured to acquire at least one of first positional data of the first vehicle; and   a receiver configured to receive at least packet signals from a second radio apparatus, each of the at least packet signals including at least one of second positional data of a second vehicle in which the second radio apparatus is mounted,   the radio or process apparatus firstly determines each of provisional collisions and each of provisional non-collisions between the first vehicle and the second vehicle on the basis of one of the at least one of the first positional data and one of the at least one of the second positional data, and   the radio or process apparatus secondly determines a collision or a non-collision between the first vehicle and the second vehicle based on at least two of the provisional collisions and/or at least two of the provisional non-collisions.   
     
     
         15 . The process system according to  claim 14 , wherein after the radio or process apparatus secondly determines the non-collision, the radio or process apparatus changes the second determination result to the collision when the radio or process apparatus determines the provisional collisions N times in succession. 
     
     
         16 . The process system according to  claim 15 , wherein
 after the radio apparatus secondly determines the collision, the radio or process apparatus changes the second determination result to non-collision when the radio or process apparatus determines the provisional non-collisions M times in succession, and   N is smaller than M in the second determiner.   
     
     
         17 . The process system according to  claim 16 , wherein N and M are positive integral numbers. 
     
     
         18 . The process system according to  claim 14 , wherein after the radio or process apparatus secondly determines the non-collision, the radio or process apparatus changes the second determination result to the collision when a ratio of the provisional collisions to the first determination results exceeds a first threshold value. 
     
     
         19 . The process system according to  claim 18 , wherein
 after the radio or process apparatus secondly determines the collision, the radio or process apparatus changes the second determination result to the non-collision when a ratio of the provisional non-collisions in the first determination results exceeds a second threshold value, and   the first threshold value is smaller than the second threshold value in the second determiner.