Communication device, communication system, communication program, and communication control method

An on-vehicle device installed in a vehicle, the on-vehicle device comprising:

• a non-transitory computer readable memory;
• and
• a hardware processor coupled to the non-transitory computer readable memory and configured to read instructions from the non-transitory computer readable memory to cause the on-vehicle device to perform operations comprising:
• receiving feature information having a data amount smaller than a total of data amounts of a plurality of types of status information each indicating a status of the vehicle, the feature information including a feature amount of a traveling status of the vehicle, and correspondence information indicating a correspondence relationship between a numeral value range of the feature amount and a traveling status of the vehicle;
• and
• determining a traveling status of the vehicle on the basis of the feature information and the correspondence information that have been received, wherein
• the feature information is a flag value indicating the traveling status of the vehicle corresponding to the numerical value range to which the feature amount belongs,
• the feature information is generated based on an intermediate data and has a data amount smaller than that of the intermediate data, and
• the intermediate data is generated based on the respective pieces of the status information and has a data amount smaller than the total of data amounts of the respective pieces of the status information.

A communication system comprising:

• a first communication apparatus installed in a vehicle;
• and
• a second communication apparatus wherein
• the first communication apparatus comprises:
• a first non-transitory computer readable memory;
• and
• a first hardware processor coupled to the first non-transitory computer readable memory and configured to read instructions from the first non-transitory computer readable memory to cause the first communication apparatus to perform operations comprising:
• generating, based on a plurality of types of status information each indicating a status of the vehicle, intermediate data having a data amount smaller than a total of data amounts of the respective pieces of the status information;
• generating, based on the intermediate data, the feature amount of a traveling status of the vehicle having a data amount smaller than the data amount of the intermediate data;
• determining which of a plurality of numerical value ranges the feature amount belongs to, and acquiring, as feature information of the traveling status of the vehicle, a flag value indicating a traveling status of the vehicle corresponding to the numerical value range to which the feature amount belongs;
• and
• transmitting vehicle information based on the feature information, and
• the second communication apparatus comprises:
• a second non-transitory computer readable memory;
• and
• a second hardware processor coupled to the second non-transitory computer readable memory and configured to read instructions from the second non-transitory computer readable memory to cause the second communication apparatus to perform operations comprising receiving the vehicle information transmitted by the first communication apparatus.

A non-transitory computer readable storage medium storing a computer program to be used in an on-vehicle device installed in a vehicle, the on-vehicle device comprising a hardware processor configured to execute the computer program to cause the on-vehicle device to perform operations comprising:

• acquiring, via a network installed in the vehicle, a plurality of types of status information each indicating a status of the vehicle;
• and
• creating, on the basis of each piece of the acquired status information, feature information having a data amount smaller than a total of data amounts of the respective pieces of the status information, the feature information including a feature amount of a traveling status of the vehicle, wherein
• the creating operation includes:
• generating, based on the respective pieces of the status information, intermediate data having a data amount smaller than the total of data amounts of the respective pieces of the status information;
• generating, based on the intermediate data, the feature amount having a data amount smaller than the data amount of the intermediate data;
• and
• determining which of a plurality of numerical value ranges the feature amount belongs to, and acquiring, as the feature information, a flag value indicating a traveling status of the vehicle corresponding to the numerical value range to which the feature amount belongs, and
• the feature information is used to create vehicle information to be transmitted to another vehicle.

A non-transitory computer readable storage medium storing a computer program to be used in an on-vehicle device installed in a vehicle, the on-vehicle device comprising a hardware processor configured to execute the computer program to cause the on-vehicle device to perform operations comprising:

• receiving feature information having a data amount smaller than a total of data amounts of a plurality of types of status information each indicating a status of the vehicle, the feature information including a feature amount of a traveling status of the vehicle, and correspondence information indicating a correspondence relationship between a numeral value range of the feature amount and a traveling status of the vehicle;
• and
• determining a traveling status of the vehicle on the basis of the feature information and the correspondence information that have been received, wherein
• the feature information is a flag value indicating the traveling status of the vehicle corresponding to the numerical value range to which the feature amount belongs,
• the feature information is generated based on an intermediate data and has a data amount smaller than that of the intermediate data, and
• the intermediate data is generated based on the respective pieces of the status information and has a data amount smaller than the total of data amounts of the respective pieces of the status information.

A control method to be used in an on-vehicle device installed in a vehicle, the control method comprising the steps of:

• acquiring, via a network installed in the vehicle, a plurality of types of status information each indicating a status of the vehicle;
• and
• creating, on the basis of each piece of the acquired status information, feature information having a data amount smaller than a total of data amounts of the respective pieces of the status information, the feature information including a feature amount of a traveling status of the vehicle, wherein
• the creating step includes:
• generating, based on the respective pieces of the status information, intermediate data having a data amount smaller than the total of data amounts of the respective pieces of the status information,
• generating, based on the intermediate data, the feature amount having a data amount smaller than the data amount of the intermediate data, and
• determining which of a plurality of numerical value ranges the feature amount belongs to, and acquiring, as the feature information, a flag value indicating a traveling status of the vehicle corresponding to the numerical value range to which the feature amount belongs;
• and
• the feature information is used to create vehicle information to be transmitted to another vehicle.

A control method to be used in an on-vehicle device installed in a vehicle, the control method comprising the steps of:

• receiving feature information having a data amount smaller than a total of data amounts of a plurality of types of status information each indicating a status of the vehicle, the feature information including a feature amount of a traveling status of the vehicle, and correspondence information indicating a correspondence relationship between a numeral value range of the feature amount and a traveling status of the vehicle;
• and
• determining a traveling status of the vehicle on the basis of the feature information and the correspondence information that have been received, wherein
• the feature information is a flag value indicating the traveling status of the vehicle corresponding to the numerical value range to which the feature amount belongs,
• the feature information is generated based on an intermediate data and has a data amount smaller than that of the intermediate data, and
• the intermediate data is generated based on the respective pieces of the status information and has a data amount smaller than the total of data amounts of the respective pieces of the status information.