Abstract: Provided is an optical communication system configured as an optical ring network including: a first optical communication device configured to transmit a first optical signal having a first wavelength in a first direction, and to transmit a second optical signal having a second wavelength in a second direction opposite to the first direction; and a second optical communication device configured to generate a first reflected signal by reflecting the first optical signal when the first optical signal is received, to generate a second reflected signal by reflecting the second optical signal when the second optical signal is received, and to transmit the first and second reflected signals to the first optical communication device, wherein the first optical communication device analyzes a connection state of the second optical communication device based on the first and second reflected signals.

Abstract: Provided are a processing method, device, and system for an overlapped multiplexing system. The method includes: receiving encoded information output by a transmit end, where the encoded information is information obtained by performing error-correcting code encoding and overlapped multiplexing encoding on input information; decoding the encoded information according to an overlapped multiplexing decoding algorithm, to obtain a first decoding result; performing error-correcting processing on the first decoding result according to an error-correcting code decoding algorithm, to obtain a second decoding result; and outputting the second decoding result.

Abstract: An Ethernet network access device includes a wired Ethernet network port and a wireless network module. The wired Ethernet network port facilitates a wired network connection to a network via a wired network line. The wireless network module includes a wireless transceiver to selectively establish a wireless connection to the network, and a wireless network repeater to selectively provide wireless access to the network for other devices when the wired network connection is established.

Abstract: A method for detecting control information in a wireless communication system is provided. The method includes checking a cyclic redundancy check (CRC) error by monitoring control channels, determining whether a value of an error check field is equal to a specific value, and, if the value of the error check field is equal to a specific value, detecting the control information on the control channel.

Abstract: Methods of operating a memory having a first pool of memory cells having a first storage density and a second pool of memory cells having a second storage density greater than the first storage density, as well as apparatus configured to perform similar methods, might include determining whether a value of an indication of available power is less than a threshold, and, in response to determining that the value of the indication of available power is less than the threshold, increasing a size of the first pool of memory cells, limiting write operations of the memory to the first pool of memory cells, and postponing movement of data from the first pool of memory cells to the second pool of memory cells.

Abstract: Data location-based query optimization for scan operators in a large-scale distributed database system is disclosed. In various embodiments, a set of query processing segments to be used to process a query is identified. It is determined for each of a plurality of data blocks to be scanned to process the query a corresponding storage location in which the data block is stored in a distributed storage system. Each of the plurality of data blocks is assigned to be scanned by a query processing segment selected based at least in part on a location of the query processing segment relative to the corresponding storage location in which the data block is stored.

Abstract: A data center network node comprising at least one server connection for connecting to a server 6, a connection 7 for connecting the at least one server 6 to a first subnetwork. The first subnetwork is a conventional subnetwork which comprises at least one of a switch or a router. The node further comprises an optical receiver array 20 for connecting the node to an optical offload subnetwork, wherein the optical receiver array 20 comprises a plurality of optical receivers. The array is configured such that each receiver is connectable to an optical path within a multi-path optical connection. The node further comprises an optical transmitter array 23 for connecting the node to an optical offload subnetwork. The optical transmitter array comprises a plurality of optical transmitters. The array is configured such that each receiver is connectable to an optical path within a multi-path optical connection.

Abstract: Apparatuses and methods of data communication between semiconductor chips are described. An example apparatus includes: a first die including a first switch circuit that receives a plurality of data signals, and further provides the plurality of data signals to a plurality of corresponding first ports among a plurality of first data ports and a first data redundancy port; and a second die including a second switch circuit that receives the plurality of data signals from the first die at a plurality of corresponding second ports among a plurality of second data ports and a second data redundancy port and further provides the plurality of data signals to a memory array.

Abstract: Some embodiments provide a method for a first DCN operating in a first datacenter as a logical network gateway that processes messages between other DCNs of the logical network and external entities, which address the logical network gateway using a first address. The first DCN has an interface with a second address for use in the first datacenter. The method stores a mapping between the second address and a third address. A second DCN operates the logical network gateway in a second datacenter and has an interface with the third address for use in the second datacenter. From the second DCN, the method receives connection state data, describing connections between the external entities and the DCNs of the logical network, that uses the third address. The method replaces the third address with the second address in the connection state data using the stored mapping and stores the connection state data.

Abstract: Embodiments generally disclosed herein include a computer-implemented method for monitoring and correlating network traffic data associated with a primary network that is in communication with a plurality of secondary networks. The method generates a network traffic data set by monitoring network traffic between the primary network and the plurality of secondary networks. The method also determines a mapping of network connectivity by monitoring inter-network routing information between the primary network and the plurality of secondary networks. In addition, the method generates a traffic measurement data set by monitoring network utilization statistics between the primary network and the plurality of secondary networks. With the collected data sets, the method then calculates a relational network mapping between the primary network and the plurality of secondary networks by correlating the network traffic data set, the mapping of network connectivity, and the traffic measurement data set.

Abstract: Read-only (“RO”) data consisting of a physically unclonable function (“PUF”) pattern is written to a ferroelectric random-access memory (“FRAM”) memory array. The FRAM array is baked to imprint the PUF pattern with a selected average depth of imprint and a corresponding average read reliability. The average depth of imprint and corresponding average read reliability are determined during testing after baking. The PUF pattern as read after baking is compared to the PUF pattern as written prior to baking. Additional PUF pattern writing and baking cycles may be performed until the average depth of imprint and associated read reliability reach a first selected level. Integrated circuits determined to be over-imprinted by exceeding a second selected level may be rejected. The first and second levels of PUF pattern imprint are selected such as to produce FRAM arrays with a unique fingerprint for each individual FRAM array-containing integrated circuit.

Abstract: A node failure recovery tool includes an interface and one or more processors. The interface is configured to receive one or more portions of state information from a first node, each of the one or more portions of state information comprising data corresponding to a user and an action and an indication of whether the portion of state information is related to one or more other portions of state information. The one or more processors are configured to determine a time corresponding to each of the one or more portions of state information and determine that the first node has crashed. The one or more processors are further configured to determine the portion of state information that was last received from the first node and send, to the first node, the portion of state information that was last received from the first node.

Abstract: An automation system includes a first control facility with a first fieldbus connection, a second control facility with a second fieldbus connection, a fieldbus, a peripheral board with at least one I/O peripheral module, wherein the peripheral board has an interface module with a third fieldbus connection, where the interface module has at least one I/O module which stores interconnection information featuring an assignment of input/outputs of the I/O peripheral module(s) to the control facilities, where the interface module additionally has a virtual I/O module, in which an output region is assigned to the first control facility, and furthermore an input region is assigned to the second controller, and where the virtual I/O module is configured such that the output data is copied from the output region of the first control facility into the input region as input data for the second control facility.

Abstract: A first system manager operating on a first node of a distributed computing system, receives data indicating a current state of the distributed computing system. The first system manager may determine, based at least in part on the current state of the distributed computing system and a set of rules for an application, an updated state of the distributed computing system. Furthermore, the first node may send the updated state of the distributed computing system to a second node of the distributed computing system. Responsive to receiving the updated state of the distributed computing system, a second system manager on the second node may modify a state of the second node. Modifying the state of the second node may comprise at least one of: starting the application on the second node, stopping the application on the second node, or modifying a state of the application on the second node.

Abstract: A first system manager operating on a first node of a distributed routing system, receives data indicating a current state of the distributed routing system. The first system manager may determine, based at least in part on the current state of the distributed routing system and a set of rules for an application, an updated state of the distributed routing system. Furthermore, the first node may send the updated state of the distributed routing system to a second node of the distributed routing system. Responsive to receiving the updated state of the distributed routing system, a second system manager on the second node may modify a state of the second node. Modifying the state of the second node may comprise at least one of: starting the application on the second node, stopping the application on the second node, or modifying a state of the application on the second node.

Abstract: There is provided a control apparatus including: a determination unit configured to determine whether a control target apparatus drivable with first power supplied from an external power supply and second power supplied from a battery is driven with the second power, on the basis of a supply state of the first power and a transmission signal acquired via a power line from an external communication apparatus connected to the power line through which the first power is transmitted; and a target control unit configured to drive the control target apparatus with the second power when the control target apparatus is determined to be driven with the second power.

Abstract: There is provided a processing machine line in which it is possible to confirm predetermined information on one machine tool at one time in a plurality of screens, a plurality of machine tools are disposed being lined up, respective control devices of the plurality of machine tools are connected to each other via a line concentrator, display units of the plurality of machine tools are connected to the control devices, and the display unit displays predetermined information on a machine tool on which the display unit is mounted out of the plurality of machine tools, and displays predetermined information on another machine tool.

Abstract: Apparatuses and methods of data communication between semiconductor chips are described. An example apparatus includes: a first die including a first switch circuit that receives a plurality of data signals, and further provides the plurality of data signals to a plurality of corresponding first ports among a plurality of first data ports and a first data redundancy port; and a second die including a second switch circuit that receives the plurality of data signals from the first die at a plurality of corresponding second ports among a plurality of second data ports and a second data redundancy port and further provides the plurality of data signals to a memory array.

Abstract: A system and method are described for establishing a secondary communication channel between an IoT device and a client device. For example, one embodiment of a method comprises: establishing a primary secure communication channel between the IoT device and an IoT service using a primary set of keys; performing a secondary key exchange using the primary secure communication channel, the client device and the IoT device each being provided with a secondary set of keys following the secondary key exchange; detecting that the primary secure communication channel is inoperative; and responsively establishing a secondary secure wireless connection between the client device and the IoT device using the secondary set of keys, the client device being provided with access to data and functions made available by the IoT device over the secondary secure wireless connection.

Abstract: A system and method for connectivity configuration of a network node permits an optical signal to be passed through the node and shifted from a first connector position to a second connector position that is offset from the first connector position. The shifted optical signal permits a number of distant nodes in the network to be reached with a direct optical connection, which can be configured to be bidirectional. The disclosed connectivity configuration reduces the cabling requirements for the network and simplifies the interconnections.

Abstract: A technique includes receiving a first signal from a first bus, and receiving a second signal from a second bus. The first and second buses are used for redundant communications. The technique includes interpreting the first and second signals to derive a bus data input signal for a controller based at least in part on detection of a predetermined bus fault.

Abstract: A semiconductor device includes a plurality of chips including first and second chips, each of the first and second chips including a first input terminal receiving a first token input signal, a first output terminal outputting a first token output signal, a second input terminal receiving a second token input signal, and a second output terminal outputting a second token output signal. The first and second chips are coupled to each other in a bi-directional ring structure such that the first output terminal of the first chip is coupled to the first input terminal of the second chip and the second output terminal of the second chip is coupled to the second input terminal of the first chip. Each of the first and second chips performs a corresponding peak zone operation according to the first token input signal and the second token input signal.

Abstract: For allocating resources in a mesh communications network for setting up a data stream transmission from a talker device to a listener device via at least one node device, data paths being defined throughout the mesh communications network following a link-state routing protocol, each node device performs receiving, obtaining, determining, and checking. And when there are enough said resources, temporarily reserving and propagating. And when receiving for said data stream transmission a stream reservation response representative of a positive acknowledgement to said stream reservation request, effectively allocating and propagating.

Abstract: The PLC communication system associated with the invention is characterized in that the system comprises a programmable logic controller (PLC), a plurality of processing devices, at least three communication processing nodes provided at the PLC and at the plurality of processing devices respectively to establish communication of the PLC and each of the processing devices and an interconnecting device and a plurality of communication lines for connecting the communication processing nodes with one another to establish data communication among the communication processing nodes. The PLC detects a state of communication failure and a display device displays an abnormal portion in a communication route based on the number of occurrences of the state of communication failure in respective interconnecting device and plurality of communication lines.

Abstract: A PLC communication system includes a PLC; a plurality of devices; three or more communication processing nodes that are provided respectively in the PLC and the devices to allow the PLC to communicate with each of the devices; and a plurality of communication lines that connect the communication processing nodes to each other to allow data communication. The PLC detects an incommunicable state between two of the communication processing nodes. The PLC communication system further includes a display device, and in a case where there are a plurality of types of incommunicable states detected by the PLC, the display device displays a portion where communication lines constituting the incommunicable states among the plurality of communication lines overlap with each other, as a line failure portion.

Abstract: This transmission network for transmitting information, of the type comprising at least two associated loops (2, 3) for transmitting information, in each of which functional nodes (4, 5) are integrated, each comprising at least one distribution module for distributing messages (6, 7) between the input and output ports of the node and at least one network interface module (8, 9) associated with this distribution module, is characterized in that the network interface modules (8, 9) of at least certain of the nodes of at least one of the loops (2, 3) are connected to the distribution modules (6, 7) for distributing the nodes of at least one other loop.

Abstract: Embodiments of the present invention provide a protection switching method, comprises: determining that the bandwidth of at least one of the transmission paths changes; obtaining a final path bandwidth combination according to the bandwidth of the transmission path whose bandwidth changes, wherein the final path bandwidth combination is formed by bandwidths of the at least two transmission paths after the bandwidth of at least one transmission path changes; querying the stored mapping relationship between the path bandwidth combination and the channel allocation policy according to the final path bandwidth combination, and determining the channel allocation policy corresponding to the final path bandwidth combination; and performing channel switching according to the channel allocation policy corresponding to the final path bandwidth combination.

Abstract: The present disclosure identifies topologies of a computer network where one network appliance may be configured as a master network appliance and where that master network appliance may communicate over a network communication interface with one or more slave network appliances. Computer networks of the present disclosure may include a switch and a firewall where the switch may be coupled to several network appliances via different network communication interfaces.

Abstract: In an example system, a first interface has a first address and a first port number. A second interface has a second address and a second port number. A router is in communication with the first and second interfaces over a network. The router is configured to request, a first set of failover information from the first interface. The router is further configured to receive the first set of failover information from the first interface. The first set of failover information includes the second address and the first port number. The router is configured to detect a failure on the first interface. The router is further configured to modify a network access translation (NAT) table stored within the router by replacing the first address of the first interface with the second address of the second interface while retaining the first port number, such that the first port number remains unchanged.

Abstract: Node devices of a mesh communications network are interconnected by links. Forwarding tables are initially built following a link-state routing protocol. Each node device performs, upon detecting a link failure or a link recovery, determining and transmitting. Each end-point, when receiving said message(s) representative of said link failure or said link recovery, records an indication of whether each data path identified in the received message(s) can be activated or not. When the received message(s) is(are) representative of a link failure, each end-point performs selecting and transmitting.

Abstract: In some embodiments, a link monitoring system (“LMS”) is configured to obtain link status metrics and packet transmission metrics for network links forming a network channel between a first network device and a second network device. The LMS can obtain link status metrics from the first network device and the second network device and can also initiate the generation of packets on the network links to obtain the packet transmission metrics. Based on the status metrics and packet transmission metrics, the LMS can determine if the network links are malfunctioning.

Abstract: A method includes: acquiring messages output by items in the system, each of messages including an output time; referring to the messages and setting item pairs which combine two items among the items, as target item pairs; determining, for each of the item pairs, a strength of relevancy between the target item pairs based on a co-occurrence probability which indicates that a message is output from one of the target item pair within a prescribed time period before or after the output time of a message output from other of the target item pair; and determining a priority ranking for investigating one or more the items among the items other than a certain item based on the strength of relevancy of each of item pairs, as a response to an input of an investigation ranking determination instruction which designates the certain item among the items as an investigation start position.

Abstract: A system, method, and safety unit provide safety assurance for a multiple redundant system controlling a plant or complex. A unit active line (UAL) status indicates the presence of at least one redundant active unit within the system. A safety verification line (SVL) status verifies the powered down status of all redundant units not active within the system. A safety unit is associated with a vital supervision card (VSC) and vital power bus and the safety unit controls switchable connections from the vital power bus to the UAL and the SVL. Based on verification of UAL and SVL status, system control includes energizing the UAL.

Abstract: A system and method can provide a data service in a network environment. The network environment can include a node, which supports a data service component that can provide a data service. Additionally, a filter can be provided on a networking device, such as a host channel adaptor (HCA) that is associated with the node. The networking device operates to use the filter to identify one or more packets targeting the data service component without protocol termination. Furthermore, the filter can forward said one or more packets to the data service component.

Abstract: A wireless communication system and methods for automatically switching device identifications are disclosed, where the device identifications are automatically determined by a plurality of work devices connected to a cable network after a connection time, respectively, and the one among the plurality of work devices becomes a main device may transmit a survive message to the work devices becoming a backup device, and the main device is determined as failing to work normally and a new main device is automatically determined again when the backup device fails to receive the survive message transmitted by the main device or a switch notification transmitted by the main device, so that the wireless communication on a carrier may have an improved stability and the technical efficacy may be achieved that the work device may automatically and rapidly determine the main device when no main device existing in the wireless network environment.

Abstract: A method of programming a flash memory is described. The method includes partitioning a flash memory into a first group having a first level of write-protection, a second group having a second level of write-protection, and a third group having a third level of write-protection. The write-protection of the second and third groups is disabled using an installation adapter. The third group is programmed using a Software Installation Device.

Abstract: A terminal allows immediate receipt of notification, while holding down the load on a management control device. The terminal has a timer value storage for storing a timer value, a counter for counting the cycle indicated by the timer value, a connection request part for transmitting a connection request to the management control device every time when the counting is finished, an event detector for detecting an event, and a timer value modifier for modifying the timer value to a value indicating a shorter cycle, upon occurrence of the event. The connection request part further transmits the connection request to the management control device, upon occurrence of detecting the event, and the timer value modifier modifies the timer value a value indicating a longer cycle, upon receiving a message indicating that there is no processing request from the management control device.

Abstract: Partition configuration and creation mechanisms for network traffic management devices. In some implementations, the present invention enhances the predictability of partition hierarchies that use weighting values and fixed rate guarantees. In some implementations, the present invention includes a configuration interface that constrains the manner in which partitions can be configured to achieve predictable and efficient results. In some implementations, the present invention includes a partition creation and deletion layer that operates to dynamically create partitions based on one or more partition patterns.

Abstract: A communication network system includes a processor, and a plurality of node apparatuses using a protocol to establish paths therebetween, wherein the processor determines each of the node apparatuses to be a packet source or a packet destination, and operates to detect an occurrence of failure in two paths being established between the packet source and the packet destination in the communication network system, and wherein the processor transmits packet data including user data through one of the two paths, and when one of the node apparatuses detects an occurrence of a failure in one of the two paths, the processor changes the path to the other path.

Abstract: A network device forwards a Session Initiation Protocol (SIP) setup request from an originating user device toward a destination user device via multiple network elements and intercepts a message-too-large error message sent from one of the multiple network elements to the originating user device. The network device automatically splits the session setup request into smaller SIP messages, where a size of each of the smaller SIP messages is less than or equal to a particular size of message that the network element will accept. The network device then notifies another one of the multiple elements that the session setup request has been split into the smaller SIP messages and sends, via the multiple network elements, the smaller SIP messages toward the destination user device on behalf of the originating device.

Abstract: A computer command processor to prepare a data processing pipeline where an output of a first process is provided as an input of a second process, wherein the first process and the second process execute at different computer systems. Systems (and the processes that are to occur there) are identified by Uniform Resource Locators (“URLs”).

Abstract: A network enabled computer receives connection profile information in a generic form and creates one or more native mode profiles to establish connections. By accepting profile information in a generic form, profile information can be readily provided from one or more ways, including from a policy server, through a user interface or from a third party application. The profile information can be provided with an order of precedence so that profile information from different sources may be combined appropriately. Additionally, the profile information may be provided in an extensible format to allow profile information to be distributed to multiple computers, even if some have different hardware or software configurations and are not programmed to recognize extensions of the profile information.

Abstract: A redundancy control method is disclosed that controls a first redundancy function that switches between a working line and a protection line in response to a detection of a line error and a second redundancy function that performs a path switching in response to a detection of a path error in a ring network operating at a path rate lower than a line rate thereof. The method comprises a step of masking the path error detection within a period from a time of the detection of the line error to an expected time of the detection of the path error.

Abstract: In a work machine, a communication system is provided, in which, when damage of disconnection or the like of a communication line occurs, desired communication is enabled without requiring manual replacement of the damaged communication line. The communication system is provided in a hydraulic excavator and comprises a vehicle body controller 12 and a monitor controller 13, serving as a first controller coupled to each of a drive-system communication line 10 and an information-system communication line 11. The communication system also comprises an engine controller 14, serving as a second controller coupled to either one of the communication lines 10 and 11.