摘要:
Digital data which are transmitted from a plurality of external devices to execute data exchange at their natural communication speeds respectively via a data transfer line are multiplexed, and multiplexed digital data are transmitted to an external network. The multiplexed digital data received from the external network are distributed by inverse multiplexing, and distributed digital data are received by target external devices via the data transfer line. Accordingly, the digital data having different communication speeds mutually can be communicated via a common data transfer line.
摘要:
Digital data which are transmitted from a plurality of external devices to execute data exchange at their natural communication speeds respectively via a data transfer line are multiplexed, and multiplexed digital data are transmitted to an external network. The multiplexed digital data received from the external network are distributed by inverse multiplexing, and distributed digital data are received by target external devices via the data transfer line. Accordingly, the digital data having different communication speeds mutually can be communicated via a common data transfer line.
摘要:
When each of a plurality of repeaters(RH1-RH5) receives emergency data including an emergency command informing the occurrence of an emergency from a node terminal(N) connected to own repeater(RH) 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.
摘要:
A first speed switching portion switches a transfer speed of digital data on a transmitter side into a predetermined transfer speed. A first command transmitter/receiver transmits to a receiver side a speed switching command which makes switch a transfer speed of the digital data on a receiver side into a transfer speed which coincides with the predetermined transfer speed. A source data reader transnits the digital data to the receiver side at the predetermined transfer speed after the transfer speed of the digital data on the receiver side has been switched into the transfer speed which coincides with the predetermined transfer speed. A second speed switching portion switches the transfer speed of the digital data on the receiver side into the predetermined transfer speed in compliance with the speed switching command which is transmitted from the transmitter side. A second command transmitter/receiver informs thc transmitter side of an end of switching after the transfer speed of the digital data on the receiver side has been switched into the predetermined transfer speed. An image memory receives the digital data transmitted from the transmitter side at the predetermined transfer speed after the transmitter side has been informed of the end of switching.
摘要:
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(GW1-GW3, RH1-RH10, H1) 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(N1-N18) 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(N1-N18) is to be executed.
摘要:
Communication stations(3) whose own addresses coincide with a destination address of communication data(31) received via data transmission lines(5) and whose write enable/disable states of their own addresses stored in their address/flag memory(21) are in their write enable states can update their own addresses to variably set address values of the communication data, then update their own address write enable/disable states to their write disable states, then execute predetermined calculations for the variably set address value in the communication data(31), and then transmit the communication data(3) whose variably set address value has been rewritten into the variably set address value obtained by the calculations to succeeding stations(3) so as to circulate between a plurality of communication stations(3) sequentially.
摘要:
In a communication system in which an asynchronous mode is employed as a media access control system, a synchronizing signal of digital data, which are sent out from a sender terminal apparatus(9 or 13) and separated into the synchronizing signal and the bit stream data, is converted into block synchronizing signals which consist of a start signal indicating head position of bit stream data and an end signal indicating end position thereof, then the bit stream data and converted block synchronizing signals are converted into compressed block data by multiplexing them not to be overlapped on a time base respectively, and then the compressed block data are transmitted to a destination terminal apparatus(17 or 21) via a data transmission line(7).
摘要:
A plurality of serial-in/parallel-out shift registers can input n-tuple speed data (where n is a positive integer) in series in synchronism with an n-tuple speed sampling clock sequentially via input ports to store them within one period of an M·n-tuple speed frame clock (where M is a positive integer and M≧2), and then output the n-tuple speed data in parallel every period of the M·n-tuple speed frame clock. A plurality of parallel-in/serial-out shift registers can input in parallel the n-tuple speed data which are output from the plurality of serial-in/parallel-out shift registers respectively, and then demodulate the n-tuple speed data into M·n-tuple speed data in synchronism with an M·n-tuple speed sampling clock and outputting the M·n-tuple speed data in serial.
摘要:
In a system wherein a plurality of communication units are connected to a bus to exchange mutual communication and a collecting communication unit collects state information indicating respective states from report communication units to manage their state information, the collecting communication unit includes an address setting portion for setting information indicating that own unit is a unit for collecting state information as identification information, and each of the report communication units includes a report command setting portion for setting identification information as a destination address and also a report command including a destination address and the state information and a transmitting portion for transmitting the report command to the collecting communication unit based on the destination address in the set report command.
摘要:
Digital data which are transmitted from a plurality of external devices to execute data exchange at their natural communication speeds respectively via a data transfer line are multiplexed, and multiplexed digital data are transmitted to an external network. The multiplexed digital data received from the external network are distributed by inverse multiplexing, and distributed digital data are received by target external devices via the data transfer line. Accordingly, the digital data having different communication speeds mutually can be communicated via a common data transfer line.