Abstract: First node stores completion information on second node that is adjacent to the first node, the completion information indicating whether or not a route between a target destination and the second node has been constructed using an address with a specified size; acquire a first address with the specified size that specifies the first node, and transmits to adjacent nodes the completion information on the first node indicating that the route between the target destination and the first node has been constructed using an address with a specified size, when the completion information on the second node has indicated that the route between the target destination and the second node has been constructed using the address with the specified size and when the first address has been acquired; and transmits a data frame by using the first address, when the completion information on the first node is transmitted.

Abstract: A node apparatus that establishes a wireless communication network through wireless communication with other node apparatuses adjacent to the node apparatus includes a memory configured to store node alive-or-dead information, which represents whether or not a node apparatus is in an abnormal state, a controller configured to perform processes including receiving a data frame, performing determination regarding an alive-or-dead state for a transmission destination node apparatus obtained from the data frame on the basis of the node alive-or-dead information stored in the memory, and determining a destination of the data frame from a transmission destination node apparatus obtained from the data frame and a transmission source node apparatus obtained from the data frame on the basis of a result of the determination, and a transmission unit configured to transmit the data frame in which the determined destination is set.

Abstract: Each of the nodes included in an ad-hoc network determines whether an identifier indicative of high-priority data is included in data received from another node. When the identifier is included in the received data, each of the nodes determines whether the subject node is a device that relays the received data to a destination. When determining that the subject node is a device that relays the received data to the destination, each of the nodes transmits the received data to the destination. When determining that the subject node is not a device that relays the received data to the destination, each of the nodes suppresses data transmission to the nodes included in the ad-hoc network.

Abstract: First node stores completion information on second node that is adjacent to the first node, the completion information indicating whether or not a route between a target destination and the second node has been constructed using an address with a specified size; acquire a first address with the specified size that specifies the first node, and transmits to adjacent nodes the completion information on the first node indicating that the route between the target destination and the first node has been constructed using an address with a specified size, when the completion information on the second node has indicated that the route between the target destination and the second node has been constructed using the address with the specified size and when the first address has been acquired; and transmits a data frame by using the first address, when the completion information on the first node is transmitted.

Abstract: A node apparatus that establishes a wireless communication network through wireless communication with other node apparatuses adjacent to the node apparatus includes a memory configured to store node alive-or-dead information, which represents whether or not a node apparatus is in an abnormal state, a controller configured to perform processes including receiving a data frame, performing determination regarding an alive-or-dead state for a transmission destination node apparatus obtained from the data frame on the basis of the node alive-or-dead information stored in the memory, and determining a destination of the data frame from a transmission destination node apparatus obtained from the data frame and a transmission source node apparatus obtained from the data frame on the basis of a result of the determination, and a transmission unit configured to transmit the data frame in which the determined destination is set.

Abstract: Each of the nodes included in an ad-hoc network determines whether an identifier indicative of high-priority data is included in data received from another node. When the identifier is included in the received data, each of the nodes determines whether the subject node is a device that relays the received data to a destination. When determining that the subject node is a device that relays the received data to the destination, each of the nodes transmits the received data to the destination. When determining that the subject node is not a device that relays the received data to the destination, each of the nodes suppresses data transmission to the nodes included in the ad-hoc network.

Abstract: In a data communication system which reduces traffic on a wireless network by reducing Ack responses, on a transmitting side, an Ack request provided within a wireless data frame is validated (turned “ON”) to be transmitted; and an Ack request cycle is extended when an Ack in response to the Ack request has been received within a fixed time (timeout period “To”) during a cycle for transmitting the Ack request while if otherwise, the cycle is shortened. On a receiving side, only in case that a frame identifier indicating a sequence of an Ack request is found to be an expected one and the present Ack request receiving interval is found to be longer than the last Ack request receiving interval, a redundant transmission frequency of the Ack in response to the Ack request is decreased while the Ack request receiving interval is updated to the present interval in either case.

Abstract: A wireless terminal and wireless communication method that can improve data transfer efficiency and reduce traffic. A frame transmitter of a wireless terminal transmits a frame by wireless. A wireless terminal receives the frame transmitted from the frame transmitter and transmits the received frame by wireless to a wireless terminal. A frame receiver receives the frame transmitted from the succeeding wireless terminal to the wireless terminal. When the frame is received by the frame receiver, a frame reception recognizer recognizes that the frame has been received by the succeeding wireless terminal. It is therefore unnecessary for the wireless terminal to receive, from the succeeding wireless terminal, a frame indicative of reception of the frame, so that the data transfer efficiency improves and the traffic reduces.

Abstract: In a location identification/management system, a portable medium reader reads a moving object identifier stored in a portable medium and relays the moving object identifier. A radio frequency identification (RFID) reader receives relayed moving object identifier and transmits a notification containing the moving object identifier and a unique RFID-reader identifier assigned thereto. A management server receives the notification and identifies a location of the moving object from the moving object identifier and the unique RFID-reader identifier contained in the notification.

Abstract: In a data communication system which reduces traffic on a wireless network by reducing Ack responses, on a transmitting side, an Ack request provided within a wireless data frame is validated (turned “ON”) to be transmitted; and an Ack request cycle is extended when an Ack in response to the Ack request has been received within a fixed time (timeout period “To”) during a cycle for transmitting the Ack request while if otherwise, the cycle is shortened. On a receiving side, only in case that a frame identifier indicating a sequence of an Ack request is found to be an expected one and the present Ack request receiving interval is found to be longer than the last Ack request receiving interval, a redundant transmission frequency of the Ack in response to the Ack request is decreased while the Ack request receiving interval is updated to the present interval in either case.

Abstract: A wireless terminal and wireless communication method that can improve data transfer efficiency and reduce traffic. A frame transmitter of a wireless terminal transmits a frame by wireless. A wireless terminal receives the frame transmitted from the frame transmitter and transmits the received frame by wireless to a wireless terminal. A frame receiver receives the frame transmitted from the succeeding wireless terminal to the wireless terminal. When the frame is received by the frame receiver, a frame reception recognizer recognizes that the frame has been received by the succeeding wireless terminal. It is therefore unnecessary for the wireless terminal to receive, from the succeeding wireless terminal, a frame indicative of reception of the frame, so that the data transfer efficiency improves and the traffic reduces.

Abstract: A storage device that is detachably attachable to an information processing apparatus, comprises an IC chip; a first control unit extracting a control command for the IC chip included in a control command for the storage device from the information processing apparatus; and a second control unit performing interface conversion corresponding to the IC chip on the control command for the IC chip extracted by the first control unit and giving the converted control command to the IC chip.