27results about "Star/tree networks" patented technology

The invention discloses a downlink message control method of a star topology network and a server for executing the control method. The star topology network comprises a server, a plurality of gateways and a plurality of nodes. The nodes communicate with the server through the gateway, and the server allocates a timer for each of the gateways. The control method comprises the following steps: 1, judging whether a node is newly accessed to the star topology network; if so, entering the step 2; Step 2, establish a node-gateway topology relationship to determine a coverage area of each gateway and a coverage area of each node; 3, allocating one of a plurality of downlink frequency points to a newly access node; 4, requesting the gateway to send the message request when the frequency requiredfor the message request to be sent by the gateway is not used by the gateway in the coverage area of the destination node of the message request. The invention can more efficiently solve the problem of co-frequency interference of downlink communication of star topology network.

The present disclosure relates to the technical field of bus communication, and provides a networking system and method based on IEEE 1394 protocol. The system comprises a central hub, a target hub and a target terminal device. The central hub comprises a plurality of central connection ports, and there is an intercommunication data link between each two of the central connection ports. The target hub comprises a target uplink port, which is connected to one of the central connection ports through a target cable complying with IEEE 1394 technical specification. The target terminal device is connected to one of the target downlink ports of the target hub through a target cable. If a first connection port of the central connection ports receives a data packet sent by the target terminal device, the central hub forwards the data packet to a second connection port of the central connection ports based on a load balancing algorithm. The technical scheme provided by one or more embodiments of the present disclosure can effectively integrate the device resources of multiple hubs.

A communication system includes a connection module, a processing module, and K nodes. The connection module is configured to connect the processing module and the K nodes. The processing module includes L communication units, where each of the L communication units corresponds to one node, the L communication units include a first communication unit, and the K nodes include a first node. The first communication unit is configured to process a packet of the first node that corresponds to the first communication unit.

A communication system according to the present invention includes a first control device and a second control device. The first control device includes: a first communication device control unit that controls the activation of communication devices and generates state information for the communication devices; a first storage device that stores the state information for the communication devices; and a first activation control unit that determines whether or not the first communication device control unit has failed. The second control device includes: a second communication device control unit; a second storage device; and a second activation control unit in which a circuit for activating the second communication device control unit and the second storage device is held in a non-transitory recording medium. When it is determined that the first communication device control unit has failed, the first activation control unit instructs the second activation control unit in cold standby to activate the second communication device control unit and the second storage device, the second activation control unit activates the second communication device control unit and the second storage device, and the second communication device control unit controls activation of the communication devices on the basis of the state information for the communication devices.

Systems, methods, and devices for offloading network data to a datastore. A system includes a publisher device in a network computing environment. The system includes a subscriber device in the network computing environment. The system includes a datastore independent of the publisher device and the subscriber device, the datastore comprising one or more processors in a processing platform configurable to execute instructions stored in non-transitory computer readable storage media. The instructions includes receiving data from the publisher device. The instructions include storing the data across one or more of a plurality of shared storage devices. The instructions include providing the data to the subscriber device.

A vehicle data communication system includes a server-side electronic control unit and a client-side electronic control unit configured to communicate data with each other via a communication path. The server-side electronic control unit includes a server-side communication band setting unit configured to work in conjunction with server-side service discovery. The client-side electronic control unit includes a client-side communication band setting unit configured to work in conjunction with client-side service discovery. The server-side communication band setting unit and the client-side communication band setting unit are configured to dynamically set a predetermined communication band.

A communication device comprising: a transmission request analysis unit that, on the basis of a transmission request transmitted from each of one or more termination devices connected to the communication device, classifies each of the one or more termination devices as either a communicating terminal or a non-communicating terminal; and a communication control unit that performs communication control on the communicating terminal and does not perform communication control on the non-communicating terminal.　

The application provides a large-scale networking method for cross-domain communication based on a soft bus, and relates to the field of communication networks.The method comprises the following steps: configuring roles for all nodes in the network, including a summary node, a group leader node and a group member node; each communication node performs initial networking according to its own role to form a tree-shaped network architecture; during the network operation, the networking topology is dynamically adjusted according to the network condition; and the connectivity state of the nodes is maintained through inter-layer heartbeat keep-alive.The application avoids the problem of limited networking scale caused by a single center node, realizes load sharing, can dynamically change the access topology, and can guarantee the service quality under the condition of large-scale networking.

The invention discloses network equipment and a networking method and device, relates to the technical field of cluster networks, and is used for solving the problem that the network equipment cannot change network topology. According to the scheme provided by the invention, the switching board is replaced, so that the network equipment supports mesh networking and also supports clos networking. According to the scheme provided by the embodiment of the invention, a plurality of SW boards are consistent or normalized under clos networking and mesh networking, and convenience can be provided for deployment, so that the network equipment is suitable for a small-scale networking scene and is also suitable for a large-scale networking scene.

A system for bandwidth estimation includes an interface and a processor. The interface communicates with a fat-tree (FT) network including leaf switches belonging to a bottom level, spine switches belonging to a top level and intermediate switches belonging to one or more intermediate levels. The processor estimates an available bandwidth between first and second leaf switches, by identifying a first bottom-to-top sub-tree to which the first leaf switch belongs, and a second bottom-to-top sub-tree to which the second leaf switch belongs, determining path counts for at least some of the switches in the intermediate levels, wherein a path count for a switch is indicative of a number of paths that each passes via the switch, reaches the first leaf switch via the first bottom-to-top sub-tree, and reaches the second leaf switch via the second bottom-to-top sub-tree, and estimating the available bandwidth based on the path counts.

A system for supporting activities in a shipyard during construction of a ship has at least one local electronic computer installed in a watchtower of the ship and operatively connected to at least one central electronic computer remote from the ship, a first plurality of electronic apparatuses operatively connected by respective wired connection backbone cables to form one or more tree network topologies, each electronic apparatus representative of a root node of a respective tree network topology being operatively connected to the at least one local electronic computer, and a plurality of sensors adapted to detect information representative of the shipyard and operatively connected by respective wired connection cables to form one or more network topologies from one or more electronic apparatuses. Each electronic apparatus is configured to manage network connectivity and safety of the shipyard based on the information representative of the shipyard detected by the plurality of sensors.

This security device comprises: a plurality of communication ports that can be connected to apparatuses; a switch unit that is able to communicate with a plurality of the apparatuses through the plurality of communication ports; and an authentication unit that acquires a connection command for at least any one of the apparatuses among the plurality of apparatuses, the connection command including authentication information, and that authenticates the connection command on the basis of the authentication information. When the authentication is successful, the authentication unit sets a communicable range, which is formed by the switch unit, of the at least any one of the apparatuses through the switch unit, in accordance with the connection command.

The application belongs to the field of multi-fork tree virtual network construction, and discloses a multi-fork tree virtual network construction method on a single host, comprising the following steps: S1: abstract definition of a multi-fork tree virtual network node, definition of a network attribute set of the multi-fork tree virtual network node based on a logical node model; S2: standard encapsulation of atomic actions, decomposition of a multi-fork tree virtual network creation process into minimum granularity indivisible operations, i.e. atomic actions, based on a preset atomic action library; S3: topology arrangement and heterogeneous node configuration generation based on layer sequence traversal, completion of multi-fork tree virtual network topology generation by inputting an atomic action list and executing atomic actions on corresponding nodes; and S4: instantiation execution of the multi-fork tree virtual network and mounting on underlying resources, conversion of the corresponding configuration of step S3 into entity resources in a host kernel by a virtual instantiation engine. Thus, the application realizes construction of a large-scale, high-fidelity and easily reconfigurable multi-level tree-shaped virtual network.

The purpose of the present disclosure is to make it possible to perform sensing data matching even in environments in which data is delayed or damaged on its way over a network.　The present disclosure is a data collection system that collects sensing data acquired at a plurality of sensor terminals at a management node. The data collection system is characterized by comprising a time-series information source that distributes time-series information that makes it possible to identify a time series. The data collection system is also characterized in that the plurality of sensor terminals use an extension area of a layer 2 communication protocol to transmit the time-series information from the time-series information source.

A network device, a network deployment method and an apparatus, relating to the technical field of cluster networks, and used for solving the problem that network devices cannot change network topologies. In the solution provided in the present application, a switch board is replaced, so that a network device supports both a mesh network deployment and a clos network deployment. In addition, by means of the the solution provided in the embodiments of the present application, in clos network deployments and mesh network deployments, a plurality of SW boards are consistent or normalized, which can provide convenience for deployments, so that network devices are applicable to both small-scale network deployment scenarios and large-scale network deployment scenarios.

Restrict users from viewing and changing the settings of the optical transceiver. [Solution] The optical transceiver includes a register for storing control information relating to the control of the optical transceiver, a register management unit for setting the control information stored in the register in response to remote control from an optical network, a connector including connection terminals for connecting the optical transceiver to a device, and an authentication unit for authenticating that the device connected to the connector is a control device capable of controlling the optical transceiver. The register management unit restricts the reading or modification of the register storing the control information from the device connected to the connector if the authentication unit does not authenticate that the device connected to the connector is a control device.

A hybrid reconfiguration scheme can allow for fast partial network reconfiguration with different routing algorithms of choice in different subparts of the network. Partial reconfigurations can be orders of magnitude faster than the initial full configuration, thus making it possible to consider performance-driven reconfigurations in lossless networks.

Connecting multiple communication devices requires changing IP address settings, which places a significant burden on on-site work. Furthermore, configurations using switching hubs can result in mixed communication paths, potentially leading to unintended communication or configuration problems. [Solution] Between the first optical transmission device and the second optical transmission device, multiple communication ports are mapped one-to-one based on their port numbers, and the input communication signal is transmitted to the corresponding communication port without changing its content. According to the present invention, even if multiple communication devices have the same IP address, they can be used without performing any configuration changes, which significantly reduces the burden of on-site work.

The application provides a bus communication system and method based on a compound wing unmanned aerial vehicle power system, which comprises a bus repeater, a standard bus interface module, a double bus communication protocol module and a bus topology structure module; the bus repeater comprises a data transceiving module, a data processing module and a data storage module; the data transceiving module comprises a non-isolation unit and an isolation unit; the non-isolation unit is connected with a flight control navigation system; the isolation unit is connected with the standard bus interface module; the double bus communication protocol module comprises a bus competition processing protocol unit, a data analysis and distribution protocol unit and a fault processing protocol unit; the bus topology structure module adopts a tree topology and comprises a main bus and a plurality of branch buses; and the application can realize safe and efficient transmission of data between the power system and the flight control navigation system, improve the anti-interference ability, expandability and fault tolerance of the system.

The invention belongs to the field of battery management, and particularly relates to an inter-unit communication method in a battery management system and a communication system in a BMS. In the hardware layer, a distributed communication module is arranged at each battery cell unit; the communication modules at the battery cell units are in communication connection by adopting a daisy chain architecture to form a CMU, and a chain head unit in the CMU is in communication connection with the BMU; when the BMU issues a data acquisition instruction, a message containing an effective address segment, a command segment, a data segment, an effective load segment and a verification segment is sent to the CMU; the object receiving the message firstly judges whether to execute an instruction and forward an original message or an updated message according to the information of the effective address field; and according to the information of the effective load segment, selecting to forward the message to a unit in a next chain or to return. And the BMU extracts data segment information according to the returned message to complete a data acquisition task. The problem that a BMS system of an existing battery pack cannot realize wire harness simplification and communication efficiency improvement at the same time is solved.

The invention relates to methods 103, 121 for transmitting data in a network 176 using TTrE (Transport-layer Tree Extension) data packets 112, 117, wherein the network 176 has a plurality of physical nodes 102, one of which acts as a server 100. Methods 103, 121 describe how TTrE data packets 112, 117 can be exchanged between the server 100 and the physical nodes 102. The physical nodes 102 are arranged as nodes 102, 114, 116, 118, 120, 130, 132, 134 in a binary search tree 111 with the server 100 as the root, with each node 102, 114, 116, 118, 120, 130, 132, 134 being assigned a key.This allows routing 108,126 of TTrE data packets 112,117 such that a node 102, 114, 116, 118, 120, 130, 132, 134, which receives or sends the TTrE data packet 112,117, decides by means of a comparison 122 between a destination address and the key assigned to it, to which of the nodes 102, 114, 116, 118, 120, 130, 132, 134 connected to it the TTrE data packet 112,117 is forwarded until it reaches the destination node.

The application provides a multi-node broadcast configuration method. A host configures a value of a broadcast countdown timer in a master node and sends configuration data to the master node. The master node sends broadcast data to each slave node, and then decreases the value of the broadcast countdown timer in the master node by 1 every preset time length and repeatedly sends the broadcast data to each slave node. The broadcast data comprises the value of the broadcast countdown timer in the master node before the broadcast data is sent and the configuration data. Each slave node configures a value of a broadcast countdown timer in the slave node based on the value of the broadcast countdown timer in the master node. The value of the broadcast countdown timer in each slave node decreases by 1 every preset time length. When the value of the broadcast countdown timer in the master node decreases to 0, the master node and each slave node writes the configuration data into a register in each node. In the scheme, all nodes are simultaneously configured and take effect through multiple times of sending the broadcast data, and the problem of broadcast write failure caused by code error can be solved, and the robustness of the broadcast write operation is improved.

A network device of a motor vehicle network structure is described, comprising an Ethernet switch and a defined total number of network devices to be connected via the Ethernet switch, wherein a port expander is connected to the Ethernet switch, the port expander having a number of device ports corresponding to the difference between the total number and the number of device ports provided for network devices on the Ethernet switch.