Abstract: A file sharing method executed by a first terminal, and including selecting from among multiple terminals including the first terminal and based on a remaining battery level of the terminals and a processing time of a shared process, a second terminal to execute the shared process for sharing multiple files among the terminals; and assigning the shared process to the second terminal.

Abstract: A given communications apparatus is included among plural first communications apparatuses, among which at least execution results of data processing of the given communications apparatus is communicated by multi-hop communication whereby, the execution results are transmitted to a second communications apparatus that performs a process based on the execution results.

Abstract: A position estimation apparatus acquires, for base devices, the number of hops from a target sensor node to a base device. The position estimation apparatus calculates, for each base device, a distribution of estimated distances corresponding to the total hops, based on the number of hops and a distribution of estimated distances stored in a storage device. The position estimation apparatus calculates, for each base device, a distribution of estimated positions within a given region, based on the distribution of estimated distances, information concerning a range of the given region, and information concerning a position of the base device. The position estimation apparatus calculates an index that indicates a probability of a position of the target sensor node within the given region, based on the sum of distributions of estimated positions concerning the base stations.

Abstract: A communications apparatus includes a reception signal processor that receives a wireless signal; a processor that controls a wait time that the reception signal processor waits for reception of wireless signals that include data to be transmitted and information of transmission paths; extracts from the information of the transmission paths included in the wireless signals received by the reception signal processor during the wait time, information of a common relay point in the transmission paths; determines a network state according to a ratio of transmission paths that include the common relay point, among a total count of the transmission paths; and generates based on the determined network state, a signal that includes information of a relay point; and a transmission signal processor that transmits the generated signal.

Abstract: A thread processing method is executed by a specific apparatus included among a plurality of apparatuses, and includes assigning one thread among a plurality of threads to the apparatuses, respectively; acquiring first time information that indicates a time at which the specific apparatus receives an execution result of a corresponding thread from each of the apparatuses; and setting a priority level of an access right to access shared memory that is shared by the apparatuses and the specific apparatus, the setting being based on the first time information and second time information that indicates a time at which reception of execution results of the threads from the apparatuses ends.

Abstract: A synchronization method of multiple threads is executed by a computer. The synchronization method includes determining a type of a synchronization process of a first thread performing the synchronization process for synchronization with a second thread; starting time measurement when the type of the synchronization process of the first thread is a first type; performing the synchronization process of the first thread and a synchronization process of the second thread based on a synchronization process history of the second thread when the measured time exceeds a permitted response period of the first thread; and updating the permitted response period and performing the synchronization processes of the first thread and the second thread based on the synchronization process history of the second thread, when another processing request is received.

Abstract: A scheduling method includes determining whether priority of an application to be activated is of a given priority, the determining being performed by a first data processing apparatus that is included in a first group having at least one data processing apparatus; transferring to a second data processing apparatus that is included in any one among a second group and the first group, a predetermined function of the first data processing apparatus so as to execute the application by the first data processing apparatus, the transferring being performed when the priority of the application is of the given priority, and the first and the second groups being among a plurality of groups that each includes at least one data processing apparatus; and placing the application in an execution queue of the first data processing apparatus, when the priority of the application is not the given priority.

Abstract: A system includes a CPU; an accelerator; a comparing unit that compares a first value that is based on a first processing time period elapsing until the CPU completes a first process and a second processing time period elapsing until the accelerator completes the first process, and a second value that is based on a state of use of a battery driving the CPU and the accelerator; and a selecting unit that selects any one among the CPU and the accelerator, based on a result of comparison by the comparing unit.

Abstract: A first node included in a first layer determines whether there has occurred a failure in a sink node included in a second layer subordinate to the first layer. The first node requests a second node included in the second layer to collect information of a third node included in a third layer subordinate to the second layer when the first node determines that there has occurred a failure in the sink node. The first node determines a fourth node serving as a substitute for the failed sink node included in the second layer on a basis of the information of the third node collected by the second node.

Abstract: A data communication method includes determining by a first terminal apparatus that is included among plural terminal apparatuses capable of direct communication with one another, whether a communication volume of data received from a second terminal apparatus that is included among the terminal apparatuses exceeds a processable communication volume; and transmitting by the first terminal apparatus to the second terminal apparatus, a portion of the data of a given communication volume, when the communication volume of the data exceeds the processable communication volume.

Abstract: A power control apparatus includes a processor configured to collect first information related to operation of a performing unit configured to perform data processing and information related to operation of a bus configured to transfer data; determine an operating frequency and an operating voltage for the performing unit, based on the collected information; estimate based on the collected information, a period elapsing until the performing unit suspends operation and a period elapsing until the bus suspends operation; derive a discriminant that obtains a difference of total power consumption and power consumption pre-switching; and execute a switching of an operating frequency and an operating voltage of the performing unit, based on a value of the discriminant.

Abstract: An exclusive access control method is executed by a computer having an operating system that when an excluded thread accesses a shared resource, executes a first exclusive access control process of prohibiting the excluded thread from attempting to access the shared resource until exclusive access control is released, the exclusive access control process being executed according to a number of attempts, by the excluded thread, to access the shared resources. The exclusive access control method includes counting by at least one second thread, including the excluded thread and different from a first thread, the number of attempts to access the shared resource, when the first thread executes a second exclusive access control process of allowing the excluded thread to attempt to access the shared resource until the excluded thread is permitted access; and storing to a memory area by the second thread, the counted number of attempts.

Abstract: A scheduling method includes acquiring first information, second information, and third information from a first terminal located in a service area of a first base station; determining based on the first information, the second information, and the third information, whether a first process assigned to the first terminal is to be collected; and assigning the first process to a second terminal located in the service area of the first base station, when at the determining the first process is determined to be collected.

Abstract: A communications network control method by a computer includes obtaining measurement area information indicating a measurement area of a sensor included in a communications node, the computer obtaining the measurement area information for each communications node in a communications node group that is included in a communications network and that is among plural communications nodes arranged in an arrangement area; obtaining divided area information indicating plural divided areas obtained by dividing the arrangement area; deriving for each divided area among the plural divided areas, a first value corresponding to a count of communications nodes that are in the communications node group and at least partially include the divided area in the measurement area indicated by the obtained measurement area information; and providing control of changing among the plural communications nodes, communications nodes included in the communications network, according to the first value derived for each divided area.

Abstract: A sensor network system includes: a plurality of sensor nodes; and a server configured to collect data from the plurality of sensor nodes. When a first sensor node among the plurality of sensor nodes obtains data, the first sensor node selects a first transmission mode to directly transmit the data to the server or a second transmission mode to transmit the data to another sensor node among the plurality of sensor nodes based on a first energy to directly transmit the data to the server, a second energy to transmit the data to the other sensor node, and a third energy to store the data in the first sensor node, and the first sensor node transmits the data to the server or the other sensor node in the selected transmission mode.

Abstract: A scheduling method executed by a scheduler that manages multiple processors, includes detecting based on an application information table when a first application is started up, a processor that executes a second application that is not executed concurrently with the first application; and assigning the first application to the processor.

Abstract: A multi-task scheduling method includes assigning a first thread to a first processor; detecting a second thread that is executed after the first thread; calculating based on a load of a processor that is assigned a third thread that generates the second thread, a first time that lasts until a start of the second thread; calculating a second time that lasts until completion of execution of the first thread; and changing a first time slice of the first processor to a second time slice when the second time is greater than the first time.

Abstract: A communication apparatus includes a processor configured to access memory of the communication apparatus; communicate with a second apparatus; detect an access request generated by the communication apparatus; determine whether an address of access targeted data indicated in the detected access request is an address allocated to the memory of the communication apparatus; and perform control for selecting and executing based on a determination result, any one among a process of accessing the memory of the communication apparatus based on the access request and a process of communicating with the second apparatus based on the access request.

Abstract: A synchronization method is executed by a multi-core processor system. The synchronization method includes registering based on a synchronous command issued from a first CPU, CPUs to be synchronized and a count of the CPUs into a specific table; counting by each of the CPUs and based on a synchronous signal from the first CPU, an arrival count for a synchronous point, and creating by each of the CPUs, a second shared memory area that is a duplication of a first shared memory area accessed by processes executed by the CPUs; and comparing the first shared memory area and the second shared memory area when the arrival count becomes equal to the count of the CPUs, and based on a result of the comparison, judging the processes executed by the CPUs.

Abstract: A data sharing method includes detecting by a first data processing apparatus that is among multiple data processing apparatuses that share data, any one among a shortage of available memory, a change in remaining battery power, a change in a relative positional distance of the first data processing apparatus to a second data processing apparatus that is among the data processing apparatuses, a change in a communication speed of communication with the second data processing apparatus, and an interruption of communication with the second data processing apparatus; and transmitting by the first data processing apparatus to a third data processing apparatus that is among the data processing apparatuses, a shared portion of the data saved in the first data processing apparatus.