Abstract: A refrigeration cycle apparatus (1) is capable of performing a refrigeration cycle using a small-GWP refrigerant. The refrigeration cycle apparatus (1) includes a refrigerant circuit (10) and a refrigerant enclosed in the refrigerant circuit (10). The refrigerant circuit includes a compressor (21), a condenser (23), a decompressing section (24), and an evaporator (31). The refrigerant contains is a small-GWP refrigerant.

Abstract: A switch device includes: a switch unit configured to relay an Ethernet frame between a plurality of function units installed in a vehicle; a monitoring unit configured to monitor predetermined data in the Ethernet frame; and a specification unit configured to specify a protocol being used by a target function unit which is a function unit serving as a transmission source of the Ethernet frame, based on a monitoring result of the monitoring unit. The monitoring unit performs an operation monitoring process of selectively monitoring an operation of the target function unit according to the target protocol that is the protocol specified by the specification unit.

Abstract: An in-vehicle communication device for transmitting and receiving a signal by a predetermined communication protocol related to Ethernet® (registered trademark), the in-vehicle communication device comprising: a control circuit configured to generate transmission data including interrupt data inserted into an inter-frame gap between Ethernet frames; and a PHY unit having a communication circuit configured to convert the transmission data generated by the control circuit into a signal and transmit the signal.

Abstract: This switch device includes: a relay unit configured to perform a first relay process of relaying data between function units installed in a vehicle and belonging to different VLANs; a calculation unit configured to calculate time correction information on the basis of a transmission time of data from a first function unit serving as the function unit to the switch device, a reception time in the switch device of the data transmitted from the first function unit, a transmission time of data from a second function unit serving as the function unit to the switch device, and a reception time in the switch device of the data transmitted from the second function unit; and a notification unit configured to notify the second function unit of the time correction information calculated by the calculation unit.

Abstract: An in-vehicle communication system includes a plurality of in-vehicle devices each being connected to an Ethernet network and a CAN (Controller Area Network). Each of the plurality of in-vehicle devices transmits and receives information to and from another in-vehicle device via the Ethernet network and the CAN. At least one of the plurality of in-vehicle devices is able to transmit the same information to the Ethernet network and the CAN in parallel.

Abstract: An in-vehicle communication system includes a first switching device and a second switching device each configured to relay, via a transmission path, information between a plurality of function units mounted to a vehicle. Upon being supplied with a power source voltage via a power-source-dedicated line from a power source device mounted to the vehicle, the first switching device supplies a power source voltage via the transmission path to one or a plurality of the function units and the second switching device that are connected to the first switching device, and the second switching device extracts a power source voltage from the transmission path, and supplies a power source voltage via the transmission path to one or a plurality of the function units that are connected to the second switching device.

Abstract: A switch device installed in a vehicle is provided with: a switch unit configured to relay communication data between a plurality of function units installed in the vehicle; a storage unit configured to hold the communication data to be relayed; and a control unit configured to determine a state of the storage unit, and adjust, for each of applications, a throughput of the communication data to be transmitted from the function units, based on a result of the determination.

Abstract: In a relay device, a control unit stores, in a temporary storage unit data which is received by an Ethernet communication unit through a communication line. When the data stored in the temporary storage unit is transmitted, the control unit deletes the transmitted data from the temporary storage unit. When the control unit determines that, for the data received by the Ethernet communication unit, the amount of data stored in the temporary storage unit is equal to or greater than a threshold value, the Ethernet communication unit transmits instruction data giving an instruction to stop transmission through a communication line and to perform transmission through a communication bus.

Abstract: In a relay device, a communication unit receives a data frame transmitted cyclically through a communication line. A control unit stores, in a temporary storage unit, the data frame received by the communication unit. When the data frame stored in the temporary storage unit is transmitted, the control unit deletes the transmitted data frame from the temporary storage unit. When the control unit determines that, for the data frame received through the communication line, the amount of data relevant to the data frames stored in the temporary storage unit is equal to or greater than a threshold value, the communication unit transmits, through the communication line, a cycle change frame which gives an instruction to change a transmission cycle for transmitting the data frame to a longer cycle.

Abstract: This on-vehicle communication apparatus is configured to communicate with another on-vehicle communication apparatus by using one differential signal line, and includes: a high-band communication unit configured to generate a high-band signal including communication information and output the high-band signal to the differential signal line; and a low-band communication unit configured to generate a direct-current signal or a low-band signal and to output the direct-current signal or the low-band signal to the differential signal line.

Abstract: A switch device installed in a vehicle is provided with: a switch unit configured to relay communication data between a plurality of function units installed in the vehicle; a storage unit configured to hold the communication data to be relayed; and a control unit configured to determine a state of the storage unit, and adjust, for each of applications, a throughput of the communication data to be transmitted from the function units, based on a result of the determination.

Abstract: In a relay device, a control unit stores, in a temporary storage unit data which is received by an Ethernet communication unit through a communication line. When the data stored in the temporary storage unit is transmitted, the control unit deletes the transmitted data from the temporary storage unit. When the control unit determines that, for the data received by the Ethernet communication unit, the amount of data stored in the temporary storage unit is equal to or greater than a threshold value, the Ethernet communication unit transmits instruction data giving an instruction to stop transmission through a communication line and to perform transmission through a communication bus.

Abstract: In a relay device, a communication unit receives a data frame transmitted cyclically through a communication line. A control unit stores, in a temporary storage unit, the data frame received by the communication unit. When the data frame stored in the temporary storage unit is transmitted, the control unit deletes the transmitted data frame from the temporary storage unit. When the control unit determines that, for the data frame received through the communication line, the amount of data relevant to the data frames stored in the temporary storage unit is equal to or greater than a threshold value, the communication unit transmits, through the communication line, a cycle change frame which gives an instruction to change a transmission cycle for transmitting the data frame to a longer cycle.

Abstract: In a relay device, a control unit detects simultaneous transmission of a plurality of data through a first communication bus. When the number of times of detection of the simultaneous transmission within a predetermined time by the control unit is less than the predetermined number of times, a CAN communication unit starts transmission of data through the first communication bus. When the number of times of detection of the simultaneous transmission within the predetermined time by the control unit is equal to or greater than the predetermined number of times, an Ethernet communication unit transmits data through a first communication line.

Abstract: In a communication apparatus, an analog circuit executes an analog process to a differential signal in a condition that a potential of a first conductor is a reference. A communication circuit receives, via a connection circuit, a differential signal obtained by the execution of the analog process of the analog process is executed and generates, based on the received differential signal, a signal with a reference corresponding to a potential of a second conductor. An inductor (a connection element) is connected between the first conductor and the second conductor. The connection circuit includes a circuit element other than a capacitor.

Abstract: A communication control device used in an on-vehicle communication system including an out-of-vehicle communication device being one of a plurality of function units provided in a vehicle and being capable of communicating with an external device outside the vehicle, and a switching device being capable of relaying communication data from one of the function units to another one of the function units, comprises: an acquisition unit that acquires status information indicating a status of a queue for storing in the switching device at least communication data from the out-of-vehicle communication device; and a control unit that determines restriction of transmission of communication data from the external device to the out-of-vehicle communication device based on the status information acquired by the acquisition unit.

Abstract: This switch device is mounted on a vehicle, and comprises: a switch unit for relaying communication data communicated between a plurality of communication devices; a buffer for holding the communication data to be relayed; and a control unit for transmitting stop request to at least one communication device of the plurality of communication devices if communication data to be transmitted to a communication device in which abnormality has been detected is held in the buffer, the stop request which requests for stopping transmission of communication data to the switch device and for holding of communication data to be transmitted to the switch device.

Abstract: A switch device includes: a switch unit configured to relay an Ethernet frame between a plurality of function units installed in a vehicle; a monitoring unit configured to monitor predetermined data in the Ethernet frame; and a specification unit configured to specify a protocol being used by a target function unit which is a function unit serving as a transmission source of the Ethernet frame, based on a monitoring result of the monitoring unit. The monitoring unit performs an operation monitoring process of selectively monitoring an operation of the target function unit according to the target protocol that is the protocol specified by the specification unit.

Abstract: An on-vehicle communication system is an on-vehicle communication system mounted on a vehicle, comprises: a plurality of on-vehicle devices including a first on-vehicle device and a second on-vehicle device; an acquisition unit that acquires error information concerning an error of data received by the first on-vehicle device from the second on-vehicle device; and a determination unit that performs determination processing of determining whether or not a communication route from the second on-vehicle device to the first on-vehicle device is to be switched to another communication route from the second on-vehicle device to the first on-vehicle device by way of another on-vehicle device based on the error information acquired by the acquisition unit.

Abstract: A switch device being equipped with an acquisition section for acquiring environmental information indicating the surrounding environment of a vehicle provided with a plurality of function sections; a switching section for performing relay processing for relaying communication data from at least one of the function sections to at least one of the other function sections; and a setting section for setting the priority level of the communication data in the relay processing on the basis of the environmental information acquired by the acquisition section.