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5276898 System for selectively compressing data frames based upon a current processor work load identifying whether the processor is too busy to perform the compression  
A method and computer system having a processor are provided for selectively compressing a data communication frame for data transfer between the computer system and at least one other system. A...
5276866 System with two different communication mediums, transmitting retrieved video and compressed audio information to plural receivers responsively to users' requests  
An interactive video based communication system provides apparatus and methods for user guided information retrieval in video frame format and transmission of the selected and retrieved...
5274768 High-performance host interface for ATM networks  
A host interface 1 for an asynchronous transfer mode (ATM) network comprises a Segmenter 2 and Reassembler 3. The host interface 1 is connected to a Sunshine ATM switch 7 via an electrical to...
5268846 Method and apparatus for nonsequential multimedia data interchange in a data processing system  
The method and apparatus may be utilized for the efficient interchange of multimedia data in a data processing system. A sequential data stream is established which includes multiple variable...
5249292 Data packet switch using a primary processing unit to designate one of a plurality of data stream control circuits to selectively handle the header processing of incoming packets in one data packet stream  
A high speed data packet switching circuit has a software controlled primary processing unit, a plurality of network interface units connected to a plurality of networks for receiving incoming...
5247626 FDDI controller having flexible buffer management  
A network interface interconnects a processor and a memory residing on a system bus having a predetermined average bus latency to a network containing other processors and memories. The interface,...
5247657 Serial data transmission including idle bits  
A serial data interface communicates data between a control processor (1) and one or more slave processors (2) via a serial bus (3). Typically the control processor (1) may be formed in a hand...
5239584 Method and apparatus for encryption/authentication of data in energy metering applications  
In one embodiment, the present invention is an encryption/decryption and authentication algorithm. The algorithm has three major steps. The first step is generating cipher text. The second step is...
5237659 Gateway device for connecting a computer bus to a ring network  
A gateway device for connecting a computer bus to a high-speed fiber optic ring network including an I/O host module of the computer connected to the computer bus and having at least one external...
5226121 Method of bit rate de-adaption using the ECMA 102 protocol  
A method of bit rate de-adaption between an adapted data rate and a user data rate using the ECMA 102 protocol. The user data is transmitted from a data adapter to a user terminal at a first data...
5214779 Variable construct representation embedded in data stream which references definition for dynamically generating data used in processing the data stream  
A system represents a variable construct within a structured data stream. Structured data streams typically include a plurality of components, each component having multiple parameters therein. A...
5185862 Apparatus for constructing data frames for transmission over a data link  
An outbound frame state machine (OFSM) which generates data frames for transmission over a data link. The OFSM is microcode controlled and includes an outbound frame header buffer for containing...
5175818 Communication interface for independently generating frame information that is subsequently stored in host memory and sent out to transmitting fifo by dma  
A communication system including a communication control unit connected through a communication line to a different system, a high-ranking processor for control of the communication control unit,...
5175817 Data representation protocol for communications between different networks  
A data representation and protocol are provided to interface two networks. A plurality of information units to be transmitted from one network to another are formatted into a variable size block...
5146572 Multiple data format interface  
An interface circuit for providing an interface with the parallel data bus that transfers information in a multiple of formats. The interface includes a control circuit that receives or sends...
5142623 High performance memory imaging network for a real time process control system  
A data communications arrangement for a distributed processor control system having a number of stations which can send and receive control data, includes a communications processor at each...
5119478 Parallel processing method and device for receiving and transmitting HDLC SDLC bit streams  
The bit streams, transporting the frames, received from lines (6) are placed in register 12 in such a way that n bits are processed in parallel during a time interval T. Parallel processor 10...
5086498 Parallel computer with asynchronous communication facility  
In a multiprocessor digital computer system ID data, coupled with data for which inter-processor communication is desired, is communicated from one processor and held temporarily with data in a...
5077655 Communication control device in computer system  
A communication control device connected through at least one network to a computer system for carrying out transmitting processing and receiving processing of data in accordance with a...
5063494 Programmable data communications controller  
The present invention provides a novel programmable data communications controller employed to accept data from a host computing system and for transmitting the data to a terminal designated by...
5063500 System for executing segments of application program concurrently/serially on different/same virtual machine  
A method to preserve system resources during the execution of distributed application programs in an SNA type data processing network that supports program to program communication between an...
5056058 Communication protocol for predicting communication frame type in high-speed processing system  
A protocol high-speed processing method to be used in a first communication control equipment for communications with a second communication equipment connected through a transmission line in...
5047927 Memory management in packet data mode systems  
A memory management system for a packet data mode system is used in conjunction with a direct memory access controller. The management system is of the type for communicating packet data into and...
5031095 Data transmission apparatus  
When an input data of a slave station makes any change, the slave station transmit a serial information (in serial data frame, FIG. 2) which is made by altering an information continuously...
5021949 Method and apparatus for linking an SNA host to a remote SNA host over a packet switched communications network  
The invention disclosed herein provides the basic operating capabilities of SNA data communications for host based application-to-application sessions across a packet switched network such as the...
5007017 Method and apparatus for data communication through composite network  
Data communication through a composite network constituted by a plurality of mutually connected individual networks. When a center connected to a first network such as a wide-area telephone...
4975830 Computer communication system having supplemental formats  
A computer communication system including a comunication medium, a plurality of nodes coupled to the communication medium, and a transfer format selection means for selecting a format for the...
4954965 Enhanced frame utilization for CSMA/CD communication protocol  
In a CSMA/CD communication protocol, data to be sent from one device on a communication network to another is put into frames, or predetermined sized pieces of information. One of the fields in a...
4945471 Message transmission system for selectively transmitting one of two colliding messages based on contents thereof  
A multiprocessor system intercouples the processors wtih an active logic network having a plurality of priority determining nodes. Messages applied concurrently to the network in groups are...
4941089 Input/output network for computer system  
An I/O network channel achieves relatively high rates of data communication between a plurality of widely physically dispersed devices interconnected by a LAN-type media. A processor connected to...
4935869 File transfer control method among a plurality of computer systems  
In a file transfer control among a plurality of computer systems, a plurality of data sets to be transferred are stored in a transaction file by executing transfer and receiving processings by use...
4918644 System containing loop shaped transmission paths for transmitting data packets using a plurality of latches connected in cascade fashion  
A data processing apparatus includes two data transmission paths formed likewise in a loop fashion. These data transmission paths include a plurality of latch registers connected in a cascade...
4893231 Multi-node data processing system  
Multi-node data processing apparatus is described, in which the nodes are interconnected by multiple transmission links. Before a node can transmit a message, it must acquire a unique transmission...
4870571 Intercomputer communications based on message broadcasting with receiver selection  
An apparatus and method of intercomputer communications based on message broadcast with receiver selection is taught. A distributed computer system is described in which each computing element...
4777595 Apparatus for transferring blocks of information from one node to a second node in a computer network  
Method and apparatus for transfer of packet-type information from the memory (24B) of one node (14) in a computer network to the memory (24C) of another node (16) in the network. The invention is...
4773043 ADCCP communication processor  
An ADCCP communication processor apparatus operates on-line between the PARCS data transmission controller (DTC) and the NORAD Cheyenne Mountain complex. The ADCCP communication processor...
4750115 Data communication system between two different data transmission systems  
A data communication system for the communication between two different data transmission systems, the SDT system and the RDT system. The SDT system includes a host CPU having an output terminal...
4727495 Data communication system  
The 16 kbit/s HDLC formatted signalling channel for each of 256 ISDN subscribers is separated from the data channel(s) at the exchange line circuit and TMD multiplexed into a 4 Mbit/s stream...
4648061 Electronic document distribution network with dynamic document interchange protocol generation  
An electronic document distribution network is provided having dynamic document interchange protocol generation. The electronic document distribution network has a dynamically variable number of...
4644547 Digital message format for two-way communication and control network  
A communication network digital message format is provided in which on message start signal has a logic "1" value for two bit intervals to provide improved noise immunity in transmission of a...
4586134 Computer network system and its use for information unit transmission  
In a computer network a communication session established between a user node such as a data terminal (31) and an application program (13) in a host processor (1) node defines the communication...
4513373 Local area network  
A local area network (10) includes a communications switch multi-port selector (12) which functions as the hub of the network. There are connected to the selector (12) various types of stations...
4493021 Multicomputer communication system  
A local area network is provided for a plurality of autonomous computers (10) which operate at different rates and under different protocols coupled by network bus adapters (12) to a global bus...
4471466 Apparatus for conforming the length of a data stream through a transmission line  
A data ring circulates a serial stream of data bits between ring stations. The data stream is made of packets and each station may add data to and extract data from the packets. As the number of...
4346440 Advanced data link controller  
A bit-oriented data link controller provides the interface between a microcomputer or terminal and a data communications link. The data link controller is capable of accommodating the three most...
4261035 Broadband high level data link communication line adapter  
A hardware/firmware communication line adapter for interfacing a communication processor to a broadband high level data link communication channel. Transmit and receive data and control characters...
4241398 Computer network, line protocol system  
A line protocol format with a low bit overhead provides for the high accuracy, asynchronous exchange of digital signal information between processing units in a supervisory control system having a...
4034351 Method and apparatus for transmitting common information in the information processing system  
In an information processing system of the type having widely dispersed terminals tied together by a series communications link, common data which is of interest to all stations is collected and...
4019176 System and method for reliable communication of stored messages among stations over a single common channel with a minimization of service message time  
A characteristic message exchange procedure is performed by a set of contler units at separate stations and of functionally identical design. The combination of a controller unit and a utilization...
3842405 COMMUNICATIONS CONTROL UNIT  
A communications control unit, integrated into a processor, enables lines and modems to be changed or replaced by different types of lines and modems without changing the control unit hardware. A...