摘要:
A flow control device constructed at a switch device for connecting a plurality of ring networks for exchanging data of a cell among the ring networks. A user device for transmitting a cell carrying data is connected to each ring network, and it can transmit cells within a window counter number. Such flow control device comprises a buffer monitoring unit for monitoring the number of data in an output buffer, a regulation judging unit for comparing the number of data in each buffer with a first threshold value representing state of the buffer which is in danger of overflow, with a second threshold value representing state of the buffer which is not in danger of overflow, and outputting a regulation notice when the data number is grater than the first threshold value while outputting a regulation notice when the data number is smaller than the second threshold value, and a plurality of traffic controlling units for transmitting to the respective ring network a reset cell at a first interval when no regulation notice is received or the release notice is received while transmitting a reset cell at a second interval which is longer than the first interval when the regulation notice is received.
摘要:
A packet communications network for transmitting data between nodes by the use of cell slots circulating the network includes a center node inserted in the ring network for sequentially generating, at a selected rate, first and second types of cell slots interleavingly for transmitting first and second types of data, respectively. Each cell slot has a type code for identifying either one of the first and second types, and a status code for identifying the different status of the cells. Each node detects whether the received cell is the first type or the second type. If the received cell is the first type, it is used for transmitting the connection-oriented data under MARS system. If the received cell is the second type, it is used for transmitting the connectionless data under ATMR system.
摘要:
A data transmission unit for use in a system wherein data to be transmitted is organized into packets which are assigned one of three states: idle, occupied, or released, and transmitted among interconnected units. Each unit is assigned a window limit on the number of packets it may transmit and has one or more terminals associated therewith, which may or may not have data to transmit. The unit responds to the state of a received packet, the state of the window limit, and the presence or absence of transmit data to control whether the packet transmitted out of the unit is a packet from an internal switching buffer, a released packet from a released cell producing circuit, an occupied packet containing data from the unit's own terminals, or a dummy cell. A released packet contains the address of the unit which generated it and is generated when there is no data to be transmitted and an idle cell is received by the unit. Any unit other than the generating unit can occupy a released packet with data from its terminal, even though its allocated window is exhausted, thereby increasing data throughput.
摘要:
A video server in which each media segment file sever (MSFS) stores media segment files (MSFs) forming video data, and sequence control brokers (SCBs) installed between the video server and subscribers terminals receive video requests from the subscriber terminals, and read out the requested MSFs from the MSFSs. The readout MSFs are exchanged by an ATM switch to be transmitted to the SCBs respectively, which outputs the MSFs at predetermined intervals to the request-sender subscriber terminals.
摘要:
A growable interconnect fabric cell switch module including a plurality of first cell switches for interconnecting cells; a plurality of second cell switches for interconnecting the cells outputted from the first cell switches; a plurality of third cell switches for interconnecting the cells outputted from the second cell switches; and a path arbitrating device for making a decision on cell transfer permission and on which second cell switch ought to be used in a cell transfer, based on a demanded cell number, which indicates a number of the cells which demand to be transferred from each first cell switch to each third cell switch.
摘要:
A transmission system for packaging and transmission digital video data divides the data into a first group of components which would cause image quality to be drastically damaged if discarded, and a second group of components which would cause little damage if discarded. Data cells are composed for each group of components, and a priorty level is assigned giving a high priority to the first group of components and a low priority to the second group of components. The data is sent and received, and the received data is classified in accordance with the priority levels. If it is necessary to discard low priority components, a compensating device compensates for the discarded cells to ensure a constant image transmission across a congested channel.
摘要:
An image processing apparatus has a line memory for writing and reading image data of one line. A write/read controller controls writing and reading the image data of one line in and from the line memory. A white line determiner determines whether an image corresponding to image data of one line being written in the line memory is a white line. An image processor performs specified image processing on the image data of one line read from the line memory by the write/read controller. An image processing controller generates an operation clock used in the image processor and causes the image processor to perform the specified image processing for the image data of one line determined not to be a white line and stops generating the operation clock and reads white data from a white data storage for the image data of one line determined to be a white line.
摘要:
A lubricating oil feeding structure that permits an adequate amount of lubricating oil to be fed to those parts around the transmission while avoiding an excess supply of lubricating oil to the lubricating oil passage in the shaft of the transmission. The transmission has a space (as a recess to hold the shaft therein) in which is arranged the oil guide part. The oil guide part has the bottomed cylinder, with its one end opened, the flange that flares outward at the open end of the bottomed cylinder, and the oil holes that communicate between the inside and the outside of the bottomed cylinder. The oil guide part is arranged in the space in such a way that the flange comes into contact with the outer race of the bearing.
摘要:
A wireless apparatus includes an antenna, a circuit board configured to form a wireless communication circuit that is connected to the antenna, and a housing configured to accommodate the circuit board and formed by resin molding. A linear conductor extends from a ground of the circuit board.