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| Number | Title | Issue Date |
| 7277910 | System and method for balancing rings coupling routing platforms A ring access system, for use in system having a plurality of routing platforms coupled by redundant rings, that allows access to either ring when a token is received at a first ring if all outstanding locally-sourced data has been stripped from the second ring.... | 10/02/2007 |
| 7269186 | Protocol for framing a payload Systems and techniques for establishing a communication link wherein a transmission source delimits frame boundaries of a payload, calculates a value as a function of a subset of the payload, and appends the value to the payload within the frame boundaries before tr... | 09/11/2007 |
| 7117264 | Method and system for peer to peer communication in a network environment A method for communicating among a plurality of peer nodes in a network environment is provided. A discovery command is communicated from a current peer node to at least one neighbor peer node, the neighbor peer node in communication with the current peer node. An a... | 10/03/2006 |
| 7107498 | System and method for identifying and maintaining reliable infrastructure links using bit error rate data in an ad-hoc communication network A system and method for determining the reliability of at least one communication link between nodes in an ad-hoc communication network. The system and method perform the operations of receiving at a first node data sent by a second node over a link from the second ... | 09/12/2006 |
| 7076715 | Safety network using phantom address information Messages in a high reliability industrial control system are associated with safety addresses preventing errors caused by misdirected messages. The safety address, however, is not transmitted with the message, but instead only the data of the message and an error de... | 07/11/2006 |
| 6947978 | Method for geolocating logical network addresses Method for geolocating logical network addresses on electronically switched dynamic communications networks, such as the Internet, using the time latency of communications to and from the logical network address to determine its location. Minimum round-trip communic... | 09/20/2005 |
| 6920508 | WDM ring network A WDM ring network and method for distributing within such ring network for feeding in data and for distributing both working signals and protection signals on different transmission paths and in oppositely directed transmission directions, and for forwarding data f... | 07/19/2005 |
| 6904048 | Sanitizing fiber channel frames A system and method of sanitizing a data frame from a node in a network loop includes receiving the data frame from the node, and, when the data frame includes invalid data, replacing a first word of the invalid data with a frame termination primitive and subsequent... | 06/07/2005 |
| 6684258 | Stackable ring network including burst transmission of data packet A stackable network unit which can form a ring with other units has a master mode in which it can place packets on the ring, so that they can be ultimately forwarded from other units, and a repeat mode in which it can make a request for transfer of master... | 01/27/2004 |
| 6512777 | Communication method and system involving distributed management of channel allocation 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 s... | 01/28/2003 |
| 6400760 | Apparatus and method for an error signal compression technique in a fast adaptive equalizer circuit In a transceiver unit including an adaptive equalizer filter unit, apparatus is provided for reducing or compressing the number of bits representing an error signal. The apparatus replaces a plurality of the most significant logic signal bits with a singl... | 06/04/2002 |
| 6167059 | Apparatus and method for transmitting data A communication system (100) comprises a processor (150), a channel memory (160), a communication line (180), a transmit connect table (146), a transmit scheduler table (144), and a program memory (148). The channel memory (160) stores channels (161) with... | 12/26/2000 |
| 6091740 | Bandwidth management method and circuit, communication apparatus, communication system, and dual-queue network unit A bandwidth management circuit in a communication system assigns time slots to constant-bit-rate signal sources and burst signal sources sharing a common communication channel. When a burst signal source has information to transmit, it is assigned time sl... | 07/18/2000 |
| 5991831 | High speed serial communications link for desktop computer peripherals The system described provides a reconfigurable serial interconnection among a processor, whether in a workstation or a server, and user class I/O devices, such as video display terminals, storage devices, and other peripherals. Sustainable I/O throughput ... | 11/23/1999 |
| 5894470 | Floating cell removing device using generic flow control and a method thereof A floating cell removing device using a generic flow control includes a processor having a generic flow control processing logic for transmitting/receiving a signal cell, checking a generic flow control field of an operation and maintenance cell and remov... | 04/13/1999 |
| 5838687 | Slot reuse method and arrangement The present invention relates to a slot reuse method and arrangement for increasement of the throughput in a DTM (Dynamic Synchronous Transfer Mode) network. The slot reuse according to the invention comprises extending the DTM block token format to inclu... | 11/17/1998 |
| 5638515 | Method for stripping dataframes from the communicating medium in an FDDI communications network A dataframe filter is provided a local area network bridge to monitor the dataframes transmitted on one network to determine those dataframes destined to be communicated to another network by the network bridge. The filter receives and examines the destin... | 06/10/1997 |
| 5537413 | Frame removal mechanism for token ring networks In accordance with principles of the invention, a frame removal mechanism for token ring networks is disclosed. The disclosed system uses strip delimiter frames. The system transmits one or more information frames onto a computer network. The system furth... | 07/16/1996 |
| 5504748 | Method of erasing slots A station for a network using a DQDB communications protocol. A counting unit for maintaining an erased count of erased slots, an erasing unit for determining, erasing and outputting slots received on a transmit bus which have been used to transmit data t... | 04/02/1996 |
| 5481538 | Frame removal mechanism for token ring networks using one or more start strip delimiter frames or circulation time interval Frame processing apparatus, and a related method for its operation, for use in a station connected to a token ring network, to ensure rapid stripping of frames from the network without reference to source addresses in the frames, and in spite of the possi... | 01/02/1996 |
| 5477540 | Frame removal mechanism using end delimiter frames for token ring networks A system for stripping frames transmitted by a station on a token ring network is disclosed. During operation of the system, the station receives a grant of permission to transmit onto the network. In an example embodiment, the grant of permission is a to... | 12/19/1995 |
| 5461625 | Frame stripping method and circuit in FDDI (fiber distributed data interface) bridge system A frame stripping method and circuit for judging whether or not of source address matching by comparing the source address of the frame returing after registering the source addresses to CAM chip upon transmitting the frame in FDDI bridge system and trans... | 10/24/1995 |
| 5400323 | Method for controlling the insertion of stations into FDDI network A concentrator which couples stations to a communications network includes internal devices connected to form a primary loop which merges with the communications network if the concentrator is connected to said communications network. The internal devices... | 03/21/1995 |
| 5396493 | Local area network bridge apparatus with dedicated packet filtering mechanism A local area network (LAN) bridge apparatus capable of carrying out the address learning and the packet filtering at a high speed, without requiring the program execution on the micro-processor for these purposes. The apparatus provides, besides the usual... | 03/07/1995 |
| 5377190 | Frame removal mechanism using frame count for token ring networks A system for stripping frames transmitted by a station on a token ring network is disclosed. During operation of the system, the station receives a grant of permission to transmit onto the network. In an example embodiment, the grant of permission is a to... | 12/27/1994 |
| 5349582 | Scheme for source assisted partial destination release of slots in slotted networks A slotted communications network by using a source node to indicate in every slot whether that slot is going to the same destination node as the immediately preceding slot. This is done by setting a flag, referred to as the continuation flag, in the heade... | 09/20/1994 |
| 5280582 | No-owner frame and multiple token removal mechanism for token ring networks A ring purging station for a token-ring network is disclosed. The station performs purging operations to remove no-owner frames and frame remnants from the network. The station begins a purging operation by detecting the token on the network and removing ... | 01/18/1994 |
| 5228034 | Ring communication network station A station (ST) of a multi-station ring communications network (RN), wherein data are transmitted in a predetermined direction includes a frame receiving device (DRX) for frames received from the ring, and a frame transmission device (DTX) for transmission... | 07/13/1993 |
| 5163047 | Time division multiplex system and method having a time slot reuse capability A multi-user Time Division Multiplex (TDM) system includes a plurality of stations and at least one erasure node located between groups of the stations. When a station reads the destination identification bits of a received time slot and determines that i... | 11/10/1992 |
| 5142530 | Multi-frame stripping protocol for token ring networks A multi-frame stripping method for use in a token ring network utilizing early token release with multiple frames transmitted by multiple stations circulating around the ring. The method recovers the ring with minimum loss of data after detection of an er... | 08/25/1992 |
| 5121388 | Time division multiplex system and method having a time slot reuse capability A multi-user Time Division Multiplex (TDM) system includes a plurality of stations and at least one erasure node located between groups of the stations. When a station reads the destination identification bits of a received time slot and determines that i... | 06/09/1992 |
| 4941142 | Frame erasing method for token ring networks without last frame indication within the frame format In a token ring transmission method wherein a plurality of nodes are interconnected in a ring form by a transmission path through which information are sent as frames in one direction, a right-to-send in said transmission path is obtained by a sender node... | 07/10/1990 |
| 4932023 | Frame stripping protocol for early token release in a ring communication network A frame stripping algorithm for use in a ring communication network utilizing early token release wherein multiple frames can exist on the ring at one time. The algorithm introduces two new strip terminating conditions which supplement two of the three co... | 06/05/1990 |
| 4575846 | Data communication system A data communication system with plural terminals in which efficient data communication without collision can be ensured by transferring the right of communication from one station to another in a determined procedure and by detecting a station which has ... | 03/11/1986 |
| 4494233 | Method and apparatus for the detection and regeneration of a lost token in a token based data communications network A token-passing, ring-based data communications network provides a distributive method and apparatus for detecting and regenerating a lost token. The method includes, after detection of the loss of the token, transmitting at a detecting node a data packet... | 01/15/1985 |
| 4300231 | Digital system error correction arrangement There is disclosed an arrangement for removing error signals from a digital loop. A binary subtraction circuit is inserted in the loop and all signals passing through the circuit are reduced by a value which is dependent upon the magnitude of the accumula... | 11/10/1981 |
| 4288871 | Digital loop conferencing signal correction arrangement There is disclosed an arrangement for removing error signals on a loop conferencing system. A decay circuit is inserted in the conference loop and all signals passing through the decay circuit are reduced by a constant factor. Those signals which are not ... | 09/08/1981 |
