Abstract: This invention provides a vehicle compartment radio LAN system for communicating with a terminal installed in a vehicle compartment through a repeater, wherein a repeater is provided in front of each seat row. Thus, a terminal installed in a front seat communicates by radio through a repeater, a terminal installed in a second seat communicates by radio through another repeater and a terminal installed in a third seat communicates by radio through still another repeater.

Abstract: Disclosed is an information network system which comprises a plurality of functional appliances, a plurality of relaying appliances each provided with respect to its corresponding functional appliance, a data transfer path for enabling the relaying appliances to be communicated with each other, an operation part for selecting a desired one from among the functional appliances so as to select a desired function from among a plurality of functions of the selected functional appliance, and a command conversion part provided between a predetermined one of the functional appliances and the relaying appliance corresponding thereto and having a command conversion table having stored therein function commands corresponding to the functions of the functional appliances.

Abstract: Upon executing data exchange between a pair of LAN's via a gate way, a root hub transmits the communication data, in an address describing area of which source/destination addresses are described, and a gate way decodes the source/destination addresses included in received communication data, decides whether or not the source and the destination belong to the same LAN based on decoded source/destination addresses and attribution identification information, selects an appropriate route as the destination of the communication data based on a result of this attribution decision, and then transmits the communication data to the destination via selected route.

Abstract: According to this invention, instead of a conventionally used wire, a radio transmitting medium is employed as a transmitting medium for transmitting information containing sound signal between a sound input unit for inputting the sound signal generated in a sound generating source and at least one sound output unit.

Abstract: When data is exchanged between a pair of LANs (3, 5) via a pair of route hubs (RH4, RH6), one of the route hubs (RH4) sends an address assignment frame to a first LAN (3) in a clockwise direction, assigns an address to each route hub (RH) and each node terminal (N), based on an address value, sequentially from the route hub (RH1) to route hub (RH4), and sends the address assignment frame, which has been returned, to the other route hub (RH6) of the pair. The other route hub (RH6) assigns the address to itself based on the address value contained in the received address assignment frame, sends the address assignment frame to a second LAN (5) in the clockwise direction, assigns the address to each route hub (RH) and each node terminal (N), based on the address value, sequentially from the route hub (RH7), and returns the address assignment frame, which has been returned, to the route hub (RH4). Thus, addresses are automatically assigned to each route hub (RH) and node terminal (N).

Abstract: A radio communication system of this invention includes: terminals for sending a connection request through broadcast, detecting a reception condition when a connection request echo sent back is received as a terminal reception condition and sending it through broadcast; plural repeaters for detecting a reception condition when the connection request is received as a repeater reception condition, sending a connection request echo including this repeater reception condition and sending back a terminal reception condition echo to a master repeater when it receives a terminal reception condition; and a master repeater for when receiving the connection request echo and terminal reception condition, selecting a repeater securing an optimum communication state based on the repeater reception condition and terminal reception condition.

Abstract: A communication system including a plurality of communication apparatuses connected via a data transmission line to execute data exchange between any of the communication apparatuses. The communication apparatuses include a transmitter/receiver configured to access said data transmission line at timing periods peculiar to respective communication apparatuses in synchronism with a common system clock among respective communication apparatuses. Further, the timing periods peculiar to respective communication apparatuses are set to be mutually shifted such that accesses to said data transmission line are not simultaneously generated from said plurality of communication apparatuses, and at least two communication apparatuses have communication speeds different from each other.

Abstract: Instead of central management of communication paths between repeating installations using a conventional central managing device, in plural repeating installations, a repeating installation compares and refers to another path information where use/free state of plural channels of the other repeating installations comprised in communication data received from the other repeating installations other than the repeating installation itself and use/free state of channels corresponding to one or more node terminal connected with the repeating installation itself, and decides path information of input-output data inputted/outputted into/from the repeating installation itself so that the respective repeating installations perform allocating management of communication channels for the input-output data individually and dispersively.

Abstract: A communication system includes a plurality of repeating devices connected with each other through a data transmitting path. One or more node terminals are connected to each repeating device. In a communication frame of communication data to be sent, an address description area is provided to describe either one of a terminal address of the node terminal related to the communication data and a device address of the repeating device also related to the communication data. In case of data communication between one node terminal and the other node terminal, the respective addresses of the node terminals are described in the address description area to designate a sender and a destination. Owing to the provision of the address description area, it is possible to certainly transmit the communication data from the sender to the nominated destination without reducing data volume transmitted per unit time.

Abstract: When a route hub receives device data synchronized with a device reference clock set in a source device connected to the route hub from the source device, the route hub modulates the device data to communication data synchronized with a transmission reference clock; adds a phase information to be used to demodulate the modulated communication data into the device data, to an empty area which is equivalent to a difference between a number of bits of each unit block of the device data and a number of bits of each unit block of the communication data synchronized with the transmission reference clock, at the time of the modulation.

Abstract: A communication system includes a plurality of repeating devices connected with each other through a data transmitting path. One or more node terminals are connected to each repeating device. In a communication frame of communication data to be sent, an address description area is provided to describe either one of a terminal address of the node terminal related to the communication data and a device address of the repeating device also related to the communication data. In case of data communication between one node terminal and the other node terminal, the respective addresses of the node terminals are described in the address description area to designate a sender and a destination. Owing to the provision of the address description area, it is possible to certainly transmit the communication data from the sender to the nominated destination without reducing data volume transmitted per unit time.

Abstract: Upon executing data exchange between a pair of LAN's via a gate way, a root hub transmits the communication data, in an address describing area of which source/destination addresses are described, and a gate way decodes the source/destination addresses included in received communication data, decides whether or not the source and the destination belong to the same LAN based on decoded source/destination addresses and attribution identification information, selects an appropriate route as the destination of the communication data based on a result of this attribution decision, and then transmits the communication data to the destination via selected route.

Abstract: The information blocks are converted into the code blocks by dividing the information blocks, which are extracted sequentially from an information sequence and acts as a conversion unit, into a plurality of original subblocks, generating a plurality of inverted subblocks containing inverted information, which are obtained by inverting all original information being allocated to one or more segments contained in original subblocks, while correlating the original subblocks with the inverted subblocks respectively, and converting the information blocks into the code blocks by combining the plurality of original subblocks and the plurality of generated inverted subblocks together. Then, the code blocks derived by conversion are restored to the original information blocks by sampling the original information, which are allocated to one or more segments contained in the original subblocks respectively, from respective original subblocks of the code blocks obtained by the conversion.

Abstract: When each of a plurality of repeaters receives emergency data including an emergency command informing the occurrence of an emergency from a node terminal connected to own repeater or the like, it temporarily suspends the processing of inputting and outputting communication data which is not emergency data for itself, preferentially permits the processing of inputting and outputting emergency data and transmits the received emergency data to at least one destination terminal.

Abstract: First, communication data are transmitted from an arbitrary originating source communication device to the other plural destination communication devices. When receiving the communication data, the respective destination communication devices which receive the communication data make responses including the receiving states of the communication data to the originating source communication device, and thereafter change a next destination of the communication data into a next address according to the description contents of a destination identifier read from the memory as next address storage means so as to transmit the communication data whose destination was changed to the communication device corresponding to the next address.

Abstract: A radio communication system of this invention includes: terminals for sending a connection request through broadcast, detecting a reception condition when a connection request echo sent back is received as a terminal reception condition and sending it through broadcast; plural repeaters for detecting a reception condition when the connection request is received as a repeater reception condition, sending a connection request echo including this repeater reception condition and sending back a terminal reception condition echo to a master repeater when it receives a terminal reception condition; and a master repeater for when receiving the connection request echo and terminal reception condition, selecting a repeater securing an optimum communication state based on the repeater reception condition and terminal reception condition.

Abstract: This invention provides a vehicle compartment radio LAN system for communicating with a terminal installed in a vehicle compartment through a repeater, wherein a repeater is provided in front of each seat row. Thus, a terminal installed in a front seat communicates by radio through a repeater, a terminal installed in a second seat communicates by radio through another repeater and a terminal installed in a third seat communicates by radio through still another repeater.

Abstract: An addressing area is provided to a data area of communication data serving as a transmission object, then root addresses which are constructed by aligning addresses of the relay units existing at branch points in communication routes in passing order are written previously into the addressing area if one-to-one communication between node terminals is to be executed, otherwise broadcast group addresses of node terminal groups as broadcast destinations are written previously in place of the root addresses into the addressing area if one-to-plural broadcast communication between node terminals is to be executed.

Abstract: Upon sequentially transmitting plural data frames to one destination address, each communication apparatus inverts “1” or “0” of a switch flag to add a new switch flag to a source address and a destination address, in a flag setting section, and the source address and the destination address added with the new flag are transmitted as a monitor data. Each communication apparatus receives all data frames on a network, and the monitor data of the data frames received in a preceding time and in a present time are compared with each other, in a malfunction detecting section. By the inversion control of the switch flag, the monitor data of the data frames received in the preceding time and in the present time cannot be equal to each other. Therefore, a malfunction specifying section detects a comparison result output indicating coincidence between the monitor data, thereby to detect occurrence of a trouble.

Abstract: In a communication system wherein a collecting communication unit of a plurality of communication units collects state information from report communication units to manage the state information, each of the report communication units comprises a state information memory for storing the state information of own communication unit, a state monitoring portion for monitoring the state information of own communication unit and then rewriting the stored state information into new state information after change if the state information has been changed, and a transmitting/receiving portion for adding the stored state information and own address to the recovery command and then transmitting the recovery command when respective report communication units receive the recovery command for recovering the state information, whereby the collecting communication unit can receive the recovery command to which changed state information and their own addresses of respective report communication units are added collectively.