Abstract: A communication apparatus that transmits and receives packet data by radio communication with another communication apparatus, the communication apparatus including a memory; and a processor coupled to the memory and the processor configured to: receive first packet data in a first packet transmission period; calculate data collection efficiency indicating a ratio of a reception data amount of the first packet data, to a transmission data amount of the first packet data, based on received the first packet data, and measure a first radio quality in a radio section between the communication apparatus and the other communication apparatus, based on received the first packet data; calculate a packet length and transmission count of the first packet data, based on the data collection efficiency and first radio quality; and transmit a second packet data including the packet length and transmission count.

Abstract: A communication control method executed by a processor included in a communication control device that controls communication with a communication device, the method includes, when a communication access to the communication device is detected, specifying a related characteristic corresponding to the communication device by referring to a first memory that stores communication device-related characteristics, determining a security function corresponding to the specified related characteristic by referring to a second memory that stores executable security functions for the communication device-related characteristics, and executing the security function determined at the determining for the communication device of the communication access.

Abstract: Provided is an abnormality detecting method implemented by a computer, the abnormality detecting method including: acquiring a plurality of pieces of performance information each containing performance of a management target device; determining whether abnormal performance information is included among the plurality of pieces of performance information, in accordance with a condition for determining an abnormality of the performance; when the abnormal performance information is included, identifying a type of a failure corresponding to the abnormal performance information, in accordance with a correspondence relationship that associates respective combinations of a plurality of identifiers indicating the abnormality of the performance with failure types; and deciding a degree of importance of a measure against the failure, in accordance with information related to the identified failure type.

Abstract: A communication system includes a first communication apparatus included in an ad hoc network, and a second communication apparatus included in an ad hoc network, the second communication apparatus being coupled to a gateway and being configured to receive data from the first communication apparatus, wherein the first communication apparatus includes a memory, and a processor coupled to the memory and configured to acquire first information regarding communication quality between the first communication and each of a plurality of adjacent nodes in the ad hoc network, determine, based on the first information, a number of the adjacent nodes whose communication quality with the first communication apparatus is equal to or greater than a first value, and control, based on the number, a transmission amount of the data transmitted to the second communication apparatus through the ad hoc network.

Abstract: A management device includes a counter that counts the first number of times authentication of a first communication device has been successful, a generating unit that generates a first password based on the first number of times, and a sending unit that sends a registration request that requests registration of the first password. The first communication device includes a counter that counts the second number of times authentication of the first communication device has been successful, a generating unit that generates a second password based on the second number of times, and a sending unit that sends a connection request that includes the second password. A second communication device includes a receiving unit that receives the registration request and the connection request and a determination unit that compares the first password with the second password and determines whether authentication of the first communication device is successful.

Abstract: A control device includes a processor. The processor is configured to obtain measurement data from a plurality of devices and predict prediction data of a specified timing using the obtained measurement data. The processor is configured to calculate, for each device, an error between the measurement data and the prediction data. The processor is configured to, based on the error for each device, assign a notification timing for each of such devices for which there is overlapping of timing of notifying the measurement data of the specified timing.

Abstract: A communication control apparatus includes: a processor configured to: fix a number of sets of data to be inserted into one packet by a communication apparatus according to a wireless quality with the communication apparatus; and notify the communication apparatus of the number of sets fixed at the fixing.

Abstract: A data acquisition unit repeatedly acquires pieces of notification information for executing predetermined processing from respective BLE devices. A connection controller detects a BLE device, calculates digitalized values of influences of the respective pieces of notification information acquired from the respective BLE devices on the predetermined processing on the basis of the pieces of notification information already acquired by the data acquisition unit, selects a BLE device on the basis of the calculated digitalized values of the influences, and causes the data acquisition unit to stop acquisition of the notification information from the selected BLE device and establishes connection with the BLE device.

Abstract: A gateway which is an example of a communication device includes a selecting unit and a management data collecting unit. The selecting unit selects a collection manipulation within a range not exceeding a resource amount allocated to transmission of management data among all resources of wireless communication usable by a device in accordance with an evaluation value. The evaluation value is a value calculated on the basis of a contribution degree to failure analysis and consumption resources for each of a plurality of collection manipulations for collecting management data used for the failure analysis from a device. The management data collecting unit executes the collection manipulation selected by the selecting unit on the device and collects the management data corresponding to the collection manipulation from the device through the wireless communication.

Abstract: Provided is an abnormality detecting method implemented by a computer, the abnormality detecting method including: acquiring a plurality of pieces of performance information each containing performance of a management target device; determining whether abnormal performance information is included among the plurality of pieces of performance information, in accordance with a condition for determining an abnormality of the performance; when the abnormal performance information is included, identifying a type of a failure corresponding to the abnormal performance information, in accordance with a correspondence relationship that associates respective combinations of a plurality of identifiers indicating the abnormality of the performance with failure types; and deciding a degree of importance of a measure against the failure, in accordance with information related to the identified failure type.

Abstract: A communication control method executed by a processor included in a communication control device that controls communication with a communication device, the method includes, when a communication access to the communication device is detected, specifying a related characteristic corresponding to the communication device by referring to a first memory that stores communication device-related characteristics, determining a security function corresponding to the specified related characteristic by referring to a second memory that stores executable security functions for the communication device-related characteristics, and executing the security function determined at the determining for the communication device of the communication access.

Abstract: A communication apparatus that transmits and receives packet data by radio communication with another communication apparatus, the communication apparatus including a memory; and a processor coupled to the memory and the processor configured to: receive first packet data in a first packet transmission period; calculate data collection efficiency indicating a ratio of a reception data amount of the first packet data, to a transmission data amount of the first packet data, based on received the first packet data, and measure a first radio quality in a radio section between the communication apparatus and the other communication apparatus, based on received the first packet data; calculate a packet length and transmission count of the first packet data, based on the data collection efficiency and first radio quality; and transmit a second packet data including the packet length and transmission count.

Abstract: A communication system includes a first communication apparatus included in an ad hoc network, and a second communication apparatus included in an ad hoc network, the second communication apparatus being coupled to a gateway and being configured to receive data from the first communication apparatus, wherein the first communication apparatus includes a memory, and a processor coupled to the memory and configured to acquire first information regarding communication quality between the first communication and each of a plurality of adjacent nodes in the ad hoc network, determine, based on the first information, a number of the adjacent nodes whose communication quality with the first communication apparatus is equal to or greater than a first value, and control, based on the number, a transmission amount of the data transmitted to the second communication apparatus through the ad hoc network.

Abstract: A radio communication anomaly detecting method includes: gathering and storing different kinds of parameters indicating a radio quality with a sensor node in a storage unit; classifying parameter sets, each containing specific kinds of parameters gathered during a prescribed time period among the stored parameters, into clusters; estimating that a rapid radio quality degradation has occurred during the prescribed time period when there is a cluster of which all average values of specified kinds of parameters among the different kinds of parameters degrade more than those of another cluster; and performing a trend analysis for a time period during which it is not estimated that the rapid radio quality degradation has occurred to determine whether each of the different kinds of parameters gathered during the time period exhibits a trend of degradation, and estimating that a slow radio quality degradation has occurred based on a result of the trend analysis.

Abstract: A communication control apparatus includes: a processor configured to: fix a number of sets of data to be inserted into one packet by a communication apparatus according to a wireless quality with the communication apparatus; and notify the communication apparatus of the number of sets fixed at the fixing.

Abstract: A gateway which is an example of a communication device includes a selecting unit and a management data collecting unit. The selecting unit selects a collection manipulation within a range not exceeding a resource amount allocated to transmission of management data among all resources of wireless communication usable by a device in accordance with an evaluation value. The evaluation value is a value calculated on the basis of a contribution degree to failure analysis and consumption resources for each of a plurality of collection manipulations for collecting management data used for the failure analysis from a device. The management data collecting unit executes the collection manipulation selected by the selecting unit on the device and collects the management data corresponding to the collection manipulation from the device through the wireless communication.

Abstract: A communication apparatus includes a first memory; a second memory; and a processor configured to store data acquisition requests received from the application in the first memory, acquire sensor data from a sensor, store the sensor data acquired from the sensor in the second memory, determine a system condition based on the data acquisition requests stored in the first memory and the sensor data stored in the second memory, and switch a method of acquiring sensor data from the sensor based on the determined system condition.

Abstract: A data acquisition unit repeatedly acquires pieces of notification information for executing predetermined processing from respective BLE devices. A connection controller detects a BLE device, calculates digitalized values of influences of the respective pieces of notification information acquired from the respective BLE devices on the predetermined processing on the basis of the pieces of notification information already acquired by the data acquisition unit, selects a BLE device on the basis of the calculated digitalized values of the influences, and causes the data acquisition unit to stop acquisition of the notification information from the selected BLE device and establishes connection with the BLE device.

Abstract: A control device includes a processor. The processor is configured to obtain measurement data from a plurality of devices and predict prediction data of a specified timing using the obtained measurement data. The processor is configured to calculate, for each device, an error between the measurement data and the prediction data. The processor is configured to, based on the error for each device, assign a notification timing for each of such devices for which there is overlapping of timing of notifying the measurement data of the specified timing.

Abstract: A management device includes a counter that counts the first number of times authentication of a first communication device has been successful, a generating unit that generates a first password based on the first number of times, and a sending unit that sends a registration request that requests registration of the first password. The first communication device includes a counter that counts the second number of times authentication of the first communication device has been successful, a generating unit that generates a second password based on the second number of times, and a sending unit that sends a connection request that includes the second password. A second communication device includes a receiving unit that receives the registration request and the connection request and a determination unit that compares the first password with the second password and determines whether authentication of the first communication device is successful.