Abstract: In a case where it is determined that communication data indicates a first data attribute in a transmitter, that communication data is transmitted and an acknowledgement signal is requested to be sent back from a receiver. If the acknowledgement signal is not sent back, that communication data is retransmitted. In a case where it is determined that the communication data indicates a second data attribute in the transmitter, that communication data is transmitted and an acknowledgement signal is requested to be sent back according to an allowable number of retransmissions corresponding to the second data attribute. And that communication data is retransmitted in accordance with the allowable number of retransmissions and presence or absence of the acknowledgement signal sent back. The allowable number of retransmissions corresponding to the second data attribute is smaller than that corresponding to the first data attribute.

Abstract: Estimates of a position of a communication device after a specific time are determined according to a position detecting unit that detects a current position of the communication device, a communication status storage unit that stores communication status data indicating a wireless communication status at each position, and the position detected by the position detecting unit. The communication device includes a prediction unit that predicts the wireless communication status at the position with reference to the communication status data, and a prediction processing unit that executes a handling process for disconnection of the communication due to deterioration of the wireless communication status based on a prediction result by the prediction unit.

Abstract: A communication system 10 is comprised of a communication device 11 and a relay device 12 that is connected to the communication device 11 by radio at close range and an other communication device 15 via a network and that relays a communication between the first device 11 and the other communication device 15. Such communication system 10 comprises local communicating units 112 and 121 and a network communicating unit 123 that detect a disconnection of a radio channel between the communication device 11 and the relay device 12 and a disconnection of a radio channel between the relay device 12 and the other communication device 15. The communication device 11 includes a notifying unit 113 that notifies a user of that a disconnection of which radio channel of a plurality of the radio channels is detected.

Abstract: A hands-free device includes a communication unit that obtains a Media Access Control (MAC) address of a portable terminal device from the portable terminal device, and an address storing unit that registers one of the MAC addresses that is obtained by the communication unit into the address storing unit itself in response to a registration trigger signal. The hands-free device also includes a control unit that reads the registered MAC address from the address storing unit and specifies a portable terminal device having the read registered address as a communication target device in response to a search trigger signal.

Abstract: A hands-free telephone conversation system includes a communication device having a microphone that receives a voice from a user, a speaker that outputs the other party's voice, a control unit that detects the status of the wireless communication, and a local wireless communication unit that wirelessly communicates with a relay device. The relay device includes a microphone that receives the voice from the user, a local wireless communication unit that wirelessly communicates with the communication device, a communication control unit that detects the status of the wireless communication, a microphone switch unit that switches the voice input reception of the microphone, and a network communication unit that sends and receives the voice to and from the other party's communication device through a network.

Abstract: Estimates a position of a communication device 200 after a specific time according to a position detecting unit 207 that detects its own position, a communication status storage unit 202 that stores communication status data 202a indicating a wireless communication status at each position, and the position detected by the position detecting unit 207, and includes a prediction unit 204 that predicts the wireless communication status at the position with reference to the communication status data 202a and a prediction processing unit 205 that executes a handling process for disconnection of the communication due to deterioration of the wireless communication status based on a prediction result by the prediction unit 204.

Abstract: When a user unlocks a door of the vehicle, a door unlocking detecting unit 118 transmits an unlocking signal to a power control unit 115. The power control unit 115, which has received the unlocking signal, uses a built-in secondary battery 119 to supply power to a CPU 111, and causes the CPU 111 to boot up a vehicle-installed apparatus 11. When the user gets in the vehicle and turns an ignition key ON, a key state detecting unit 117 notifies the power control unit 115 that the ignition key is turned ON, and the power control unit 115 switches a power supply from the built-in secondary battery 119 to a vehicle-installed battery 116. Thus, it is possible to provide a vehicle-installed system including a power control unit saving the user from the inconvenience of waiting for a vehicle-installed apparatus to perform an initial boot-up when he/she gets in the vehicle.

Abstract: A communication system 10 is comprised of a communication device 11 and a relay device 12 that is connected to the communication device 11 by radio at close range and an other communication device 15 via a network and that relays a communication between the first device 11 and the other communication device 15. Such communication system 10 comprises local communicating units 112 and 121 and a network communicating unit 123 that detect a disconnection of a radio channel between the communication device 11 and the relay device 12 and a disconnection of a radio channel between the relay device 12 and the other communication device 15. The communication device 11 includes a notifying unit 113 that notifies a user of that a disconnection of which radio channel of a plurality of the radio channels is detected.

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: 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: A hands-free telephone conversation system comprises the communication device 11 and the relay device 12.

Abstract: A hands-free device 130 includes the following units: a communication unit 131 that obtains an MAC address of a portable terminal device 110 from the portable terminal device 110; an address storing unit 133 that registers one of MAC addresses obtained by the communication unit 131 into the address storing unit 133 itself in response to a registration trigger signal; and a control unit 136 that reads the registered MAC address from the address storing unit 133 and specifies a portable terminal device 110, which has the read registered address, as a communication target device in response to a search trigger signal.

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: A signal decoding method comprises the steps of: receiving multiplexed signals in which coded signals of plural pieces of information to be recorded or transmitted have been multiplexed; obtaining priority information of respective information from the multiplexed signals; and decoding coded signals of respective information included in the multiplexed signals in the order in accordance with the obtained priority information.

Abstract: A signal decoding method comprises the steps of: receiving multiplexed signals in which coded signals of plural pieces of information to be recorded or transmitted have been multiplexed; obtaining priority information of respective information from the multiplexed signals; and decoding coded signals of respective information included in the multiplexed signals in the order in accordance with the obtained priority information.

Abstract: A handsfree video phone system that includes a video phone terminal 106 and a car device in which a microphone 101, a speaker 102, a camera 103 are connected with an instrument panel 105 via a cable 104. The video phone terminal 106 is connected with the instrument panel 105 via a wireless communication medium 107. When the video phone terminal 106 is brought into the vehicle, the instrument panel 105 informs the video phone terminal 106 of the attribute information on the system structure. According to the attribute information, the video phone terminal 106 switches the paths of multiplexed audio-video data so as to replace a microphone, a speaker, a camera, and a display that have been built in the video phone terminal 106 with the microphone 101, the speaker 102, the camera 103, and a display of the instrument panel 105 when the status changes to the communication status.

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 network control system is provided which includes: a network terminal; and a control terminal. The network terminal transmits to the control terminal manipulation information indicating a type of at least one manipulation component and a manipulation requesting signal corresponding to the manipulation component, receives from the control terminal the manipulation requesting signal, and performs an operation corresponding to the manipulation requesting signal upon receipt of the manipulation requesting signal from the control terminal.

Abstract: There is disclosed a polycarbonate composition which comprises having a melt flow rate of 5 to 50 g/10 min and composed of:(a) 30 to 65 parts by weight of a thermoplastic aromatic polycarbonate,(b) 70 to 35 parts by weight of glass fibers with an average diameter of 3 to 15 .mu.m, and(c) 0.01 to 15 parts by weight of at least one component selected from the group consisting of (c-1) to (c-3) shown below formulated therein based on 100 parts by weight of the total amount of (a) and (b):(c-1) 0.3 to 10 parts by weight of a brominated polystyrene with an average particle size of 0.1 to 50 .mu.m;(c-2) 0.3 to 10 parts by weight of zinc sulfide with an average particle size of 0.1 to 50 .mu.m; and(c-3) 0.01 to 5 parts by weight of a melamine-cyanuric acid adduct with an average particle size of 0.1 to 50 .mu.m.