Abstract: A device management system includes a learning unit 81 for learning a state model representing a normal state of a system including a control target device, based on a control sequence representing one or more time-series commands and data indicating a state of the control target device when the control sequence is issued.

Abstract: This wireless communication terminal is provided with: a short-range wireless communication unit; a data storage unit; a data synchronization unit that synchronizes data by using short-range wireless communications to transmit/receive to/from another wireless communication terminal data that is stored in the data storage unit; and an activation control unit that, at the same time as an activation target structure that is provided to the other wireless communication terminal is activated, activates an activation target structure that includes at least the data synchronization unit and causes the activation target structure to operate so as to synchronize data.

Abstract: A communication method and a system are provided that make it possible to transfer information between groups. The communication method is a communication method in a wireless communication network including a plurality of nodes that can form a peer-to-peer group, wherein an owner node operating as an access point in one group selects one or a plurality of client nodes within this group as delivery nodes, the delivery node disconnects from the group and connects to another group that is present in vicinity, and information is transferred between the delivery node and an owner node of the another group.

Abstract: A communication method, a communication system, a wireless terminal, and a wireless control method are provided that make it possible to share information between terminals without forming a group. In a communication method in a wireless communication network including a plurality of terminals (N1 to N3), a first terminal (N1) and a second terminal(N2 or N3) that belong to different groups, or do not belong to a group, can embed arbitrary information in a control frame (101) that is sent and received to search for a terminal or another group in vicinity, and notification information (MSG) of one of the terminals is notified to the other terminal by using the control frame.

Abstract: A first communication terminal, unconnected with a communication network, searches for a second communication terminal existing around the own communication terminal. In the communication network, one of a plurality of communication terminals functions as a master having a function of an access point, and the rest of the communication terminals function as slaves of the master. Based on the information included in a communication message received from one or more second communication terminals found through the search, the first communication terminal determines a second communication terminal which serves as a connection counterpart from among the second communication terminals, and configures a communication network with the determined connection counterpart.

Abstract: Provided are a communications state determination device, etc., capable of improving the accuracy of network state specification. This communications state estimation device comprises: a setting means that, in accordance with given communications parameters, applies the communications parameters to a communications device that determines the occurrence of communications errors in communications with a communications destination device; a detection means that sends communications instructions to the communications device that performs communications, in accordance with received communications instructions, and detects the occurrence of communications errors that have been determined in the communications that are in accordance with the instructions; and an estimation means that estimates whether or not the communications device can perform the communications, on the basis of the communications parameters and the existence or otherwise of communications errors.

Abstract: A method to reduce group reformation time and maintain seamless connectivity in a peer-to-peer network at the time of disappearance of the Group Owner (GO). Each of the nodes is provided with an emergency leader list which prioritizes a predetermined number of emergency leader nodes each of which is a client node having intent of acting as an emergency leader, wherein the emergency leader list is prepared right at the time of group formation. The emergency leader nodes broadcast beacons when a leader node disappears from the group without notice. Each of the client nodes barring a first-priority emergency leader node of the emergency leader list connects to a highest priority one of emergency leader nodes detected by the client node.

Abstract: A node device has a delivery predictability management part, a DTN communication part, and a user interface part. The delivery predictability management part stores, for each destination node, delivery predictabilities including a delivery predictability for the destination node calculated by a local node and a delivery predictability for the destination node calculated by a neighboring node. The DTN communication part refers to the delivery predictabilities for each destination node and selects a next hop node in transferring transfer data from the local node to the destination node. The user interface part allows selection of a destination node for DTN communication with the local node as a source node on a basis of the delivery predictabilities for each destination node.

Abstract: A data-storing-terminal counting unit counts the number of communication terminals in which each of a number of data are stored. Based on the results of the counts, a communication terminal count estimation unit estimates the number of communication terminals that will transmit data with the same timing. An adjustment reference value calculation unit computes an adjustment reference value for constraining the number of communication terminals estimated by the communication terminal count estimation unit to be less than or equal to a preset allowable number. On the basis of the adjustment reference value computed by the adjustment reference value calculation unit, a determination unit determines whether or not to permit transmission of data stored by a storing means. If the determination unit permits the transmission of said data, a data transmission unit transmits the data to a communication terminal in which said data is not stored.

Abstract: A wireless communication terminal of the present invention includes: a short-range wireless communication unit; a data storage unit; a data transmission/reception unit that transmits and receives data stored in the data storage unit to and from another wireless communication terminal by means of short-range wireless communication; and a terminal specifying information storage unit that stores transmission-direction-side terminal specifying information that is information specifying a transmission-direction-side wireless communication terminal being another wireless communication terminal located adjacent to an own terminal in a data transmission direction on a path established to transmit data from the own terminal via another wireless communication terminal by means of short-range wireless communication, wherein the data transmission/reception unit transmits data stored in the data storage unit of the own terminal by means of short-range wireless communication to only the transmission-direction-side wireless

Abstract: A communication terminal has a wireless communication part and a control part. The control part sequentially switches a plurality of communication channels and discovers another communication terminal existing around the communication terminal itself. In the case of connecting to the other communication terminal found in the discovery, the control part determines which of the communication terminals transmits a connection request. In a case where the communication terminal itself does not transmit a connection request, the control part stops the discovery process and waists for reception of a connection request from the other communication terminal by using a given communication channel.

Abstract: A first communication terminal, unconnected with a communication network, searches for a second communication terminal existing around the own communication terminal. In the communication network, one of communication terminals functions as a master having a function of an access point and the rest of the communication terminals function as slaves of the master. Among the one or more second communication terminals found through the search, the first communication terminal determines a second communication terminal, in which information included in a communication message received from the second communication terminal shows that it is a connected master terminal which is a terminal connected with the communication network and functions as the master, to be a connection counterpart. Then, the first communication terminal configures a network with the determined connection counterpart.

Abstract: The purpose of the present application is to provide a technique for the exchange of path information between different routing domains, which, while reducing the exchange of useless path information in the stage for constructing a hierarchical structure, can maintain robustness of path recognition that tolerates network partition.

Abstract: A communication system that improves the total throughput of the communication is provided. A communication system (1) according to the present invention includes a plurality of terminals and an access point (201) with which the terminals communicate. The terminal acquires the number of terminals in a communication network of the access point (201), and divides, based on the number of terminals, the plurality of terminals into groups so that each group includes the number of terminals equal to or smaller than the number of terminals permitted to communicate with the access point (201) within a predetermined period. The terminal allocates the group to the predetermined period, and determines, based on the group to which a terminal belongs, whether to permit data transmission within the predetermined period to which the group is allocated.

Abstract: This wireless communication terminal is provided with: a short-range wireless communication unit; a data storage unit; a data synchronization unit that synchronizes data by using short-range wireless communications to transmit/receive to/from another wireless communication terminal data that is stored in the data storage unit; and an activation control unit that, at the same time as an activation target structure that is provided to the other wireless communication terminal is activated, activates an activation target structure that includes at least the data synchronization unit and causes the activation target structure to operate so as to synchronize data.

Abstract: A request possibility determination unit 13 for a communications terminal 1-1 determines whether or not communications time required for obtaining data from a communications terminal 1-2 can be secured, between the communications terminal 1-2 and the communications terminal 1-1. A data acquisition unit 12: determines data that has not been stored in a data storage unit 14, among data on a list received as a result of a communications message from another communications terminal 1-2; and requests the determined data from the communications terminal 1-2, by using a communications message on the condition that the request possibility determination unit 13 has determined that communications time can be secured.

Abstract: A communication method and a system are provided that make it possible to transfer information between groups. The communication method is a communication method in a wireless communication network including a plurality of nodes that can form a peer-to-peer group, wherein an owner node operating as an access point in one group selects one or a plurality of client nodes within this group as delivery nodes, the delivery node disconnects from the group and connects to another group that is present in vicinity, and information is transferred between the delivery node and an owner node of the another group.

Abstract: A method, a system, and a wireless terminal are provided that can search for a neighboring terminal efficiently within a group. In a communication system in a wireless communication network including a plurality of terminals (N10 to N13) that can from a peer-to-peer group, an owner terminal (N10) operating as an access point in one group (G1) designates part (N12) of the client terminals in this group as a searching terminal, and the searching terminal searches for a terminal (N14, N15) that is present in vicinity.

Abstract: A communication method, a communication system, a wireless terminal, and a wireless control method are provided that make it possible to share information between terminals without forming a group. In a communication method in a wireless communication network including a plurality of terminals (N1 to N3), a first terminal (N1) and a second terminal(N2 or N3) that belong to different groups, or do not belong to a group, can embed arbitrary information in a control frame (101) that is sent and received to search for a terminal or another group in vicinity, and notification information (MSG) of one of the terminals is notified to the other terminal by using the control frame.

Abstract: A storage part stores the history of a failure in connection to the other communication device. A searching part performs search for the other communication device. A connection availability determination part performs determination whether or not to connect to the other communication device found in the search on the basis of the history. A connection control part causes the searching part to perform the search again in a case where it is determined not to connect. On the other hand, in a case where it is determined to connect, the connection control part executes a connection process of connecting to the other communication device and, when the connection process fails, the connection control part performs update of the history and causes the searching part to perform the search again.