Abstract: In a network of a topology of a loop and a bus, occurrence of a failure is detected and a location of the failure is specified. Occurrence of the failure is detected by detecting that a specific signal pattern to be received at regular time intervals within a fixed time period is not received. A node which has detected occurrence of the failure transmits or receives a specifying signal among the nodes, and decide whether or not the failure has occurred adjacently to itself. A packet indicating a decided location of the failure is transmitted or received among nodes, and thereby respective nodes specify the location of the failure. When the failure has occurred at the master node, a node having a smallest node ID after waiting time according to the node ID operates as the alternative master node.

Abstract: A communication system, a vehicle-mounted communication system, a communication device, and a vehicle-mounted device, which can easily and simultaneously set plural devices which are connected by a network. A communication terminal (server) comprises a storage medium interface to or from which a storage medium can be inserted or removed, and each of a plurality of devices comprises a control means for controlling reading of setting information from the storage medium which has been inserted into the storage medium interface of the communication terminal (server) or writing of the setting information to the storage medium, via a network, and a setting part for setting the self-device on the basis of the setting information read from the storage medium.

Abstract: A bidirectional remote control system including a bidirectional remote controller and first and second devices controlled thereby, wherein the first device is for receiving a request of device information from the bidirectional remote controller and for sending the device information to the bidirectional remote controller. The bidirectional remote controller is also for sending the request of the device information to the first device, receiving the device information from the first device and sending the device information to the second device, which is for receiving the device information from the bidirectional remote controller.

Abstract: An in-vehicle communication device 300 that automatically answers a caller device that sends a call when a telephone device 100 located in a vehicle receives the call comprising: in-vehicle sensors 311˜316 that detect vehicle conditions, a communication interface 340 for the telephone device 100, and a control device 380 that controls the telephone device 100 via the communication interface 340, wherein the control device 380 acquires the vehicle conditions which are detected by the in-vehicle sensors 311˜316, judges whether a driver's answering the call is dangerous or not based on the acquired vehicle conditions when the control device 380 detects the call to the telephone device 100, prepares an answer message including vehicle information that depends upon a running condition of the vehicle at the time when the driver's answering the call is judged to be dangerous, and sends the prepared answer message to the caller device.

Abstract: The present invention provides a communication system, a vehicle-mounted communication system, a communication device, and a vehicle-mounted device, which can easily and simultaneously set plural devices which are connected by a network. A communication terminal (server) 11 comprises a storage medium interface 112 to or from which a storage medium 111 can be inserted or removed, and each of devices 12a to 12c comprises a control means 122 for controlling reading of setting information 115 from the storage medium 111 which has been inserted into the storage medium interface 112 of the communication terminal (server) 11 or writing of the setting information 115 to the storage medium 111, via a network 15, and a setting means 124 for setting the self-device on the basis of the setting information 115 read from the storage medium 111.

Abstract: A master station 11 produces a token packet for isochronous data in which a slave station 12 and slave stations 13 and 14 serving as a sending station and receiving stations are designated using IDs for isochronous data “#2” and “#3” in accordance with contents described in a table 161 held in its inner part so as to manage a transmission bandwidth using a token packet sending/analysis executing device 16, and sends out the produced token packet to a transition path 15 on the downstream side. The slave station 12 sends out an isochronous data packet 42 using the token packet for isochronous data 41. According to the token packet for isochronous data 41, the slave stations 13 and 14 are designated as receiving stations using the ID for isochronous data “#3”, so that the slave stations 13 and 14 perform the above-mentioned operations, to receive the isochronous data packet 42.

Abstract: A network system comprises a main loop in which one master node which issues a token packet for data communication, and at least one slave node are connected in a loop; a first sub loop in which the master node, one sub-master node, and at least one slave node are connected in a loop; and at least one second sub loop in which the master node, at least two sub-master nodes including the sub-master node of the first sub loop, and at least one slave node are connected in a loop. In this network system, each node has an analysis execution unit which performs analysis of the token packet, control of data transmission and data reception, and a switch for changing the connection. When each node receives and analyzes the token packet, it controls the switch so as to output, transmit, or discard the token packet and a data packet. Therefore, addition of nodes and loops is facilitated while maintaining the transmission efficiency, without increasing the packet transmission time.

Abstract: A network system in which at least one loop comprising plural loop-connected nodes and at least one loop comprising either a single node or plural loop-connected nodes are directly connected to a common transmission line, wherein a signal output from one of the nodes is transmitted to all the nodes, and then is discarded by one of the nodes in each loop.