1326 results about "Central node" patented technology

A mobile communication terminal communicates with a central node to provide automatically synchronization of user content stored on a mobile device with user content stored at a central node, such as at a synchronization server. In this way, automatic two-way synching may be provided, the user may monitor, view, update, change, add to or delete all or any field of user content using a web interface stored for a mobile device at a central node such as at a synchronization server cloud or data storage cloud, using a remote device, including an off-line device. Current location of the mobile terminal may also be tracked at the central node.

Systems and methods are provided for resolving domain name services (DNS) queries for address information about hosts on a network. The queries are posited from remote users across a satellite or other remote link to a network, and are monitored as they pass through a central node logically present between the remote link and the network. A list of statistically significant hosts on the network is maintained and transmitted from the central node to the plurality of remote users across the remote link. By providing the remote nodes with a current list of popular hosts and associated address information, subsequent domain name services queries placed for the statistically significant hosts may be resolved without communicating across the remote link.

A plurality of computer nodes communicate using seemingly random Internet Protocol source and destination addresses. Data packets matching criteria defined by a moving window of valid addresses are accepted for further processing, while those that do not meet the criteria are quickly rejected. Improvements to the basic design include (1) a load balancer that distributes packets across different transmission paths according to transmission path quality; (2) a DNS proxy server that transparently creates a virtual private network in response to a domain name inquiry; (3) a large-to-small link bandwidth management feature that prevents denial-of-service attacks at system chokepoints; (4) a traffic limiter that regulates incoming packets by limiting the rate at which a transmitter can be synchronized with a receiver; and (5) a signaling synchronizer, that allows a large number of nodes to communicate with a central node by partitioning the communication function between two separate entities.

One embodiment of the present invention provides a system that facilitates forwarding of packets in an Ethernet passive optical network (EPON), which includes a central node and at least one remote node. During operation, the system assigns a logical link identifier (LLID) to a remote node, wherein an LLID corresponds to a logical link between the central node and a remote node. The system also associates an LLID with a port of a switch within the central node, wherein the switch has a number of ports; wherein a port may be a physical port or a virtual port; and wherein the number of ports on the switch are divided into network-side ports and user-side ports. Upon receiving a downstream packet from a network-side port, the system searches a mapping table to determine whether one or more field values of the downstream packet correspond to any LLIDs or ports. If the one or more field values correspond to an LLID, the system assigns the LLID to the downstream packet and transmits the downstream packet to a remote node.

A meter data collection system in which endpoint meters are reconfigurable to operate in either a mobile mode or a fixed network mode is disclosed herein. While operating in the mobile mode, the endpoint meters transmit their meter data to a mobile device such as a “walk by” or “drive by” data collection device. While operating in the fixed network mode, the endpoint meters communicate with each other and with a central node to form a fixed wireless network. The endpoint meters may include a transceiver that enables the endpoint meters to transmit and receive data to and from the mobile device or other nodes in the fixed wireless network. The endpoint meters can be quickly and easily transitioned from operation in the mobile mode to operation in the fixed network mode (or vice versa) without changes to the endpoint meter hardware and without substantial re-configuration of the endpoint meters.

A system and method for performing file synchronization in multiple nodes. The system includes a central node (120), and a plurality of local nodes (100) connected with the central node by a common communications network (110). Each local node includes a local application server (101), a local file server (103), and a local database (104). The central node includes a central application server (121), a central file server (123), and a central database (124). A synchronization program (122) running on the central application server downloads updated copies of files from the local file servers, and uploads the updated copies of files to the central file server as latest editions of the files. A proxy (102) running on each local application server updates copies of files in its respective local file server, and downloads latest editions of files from the central node.

The invention discloses a method for use in a wireless communications system with a plurality of broadcasting nodes, comprising the step of enabling one node in the system to function as a central node in said system and letting said node enable measurements on at least one frequency in a frequency band used by the system. Said measurements are carried out to detect if said at least one frequency is being utilized by a transmitter foreign to the system. Preferably, the measurement is enabled by means of the node transmitting a message to other nodes in the system, said message being a message pre-defined within the system as a message prohibiting all nodes from transmitting during a certain interval, said message being transmitted after the system has been detected by the node to be silent during a predefined interval between frame transmissions from the nodes in the system.

The invention relates to a resonant switched capacitor direct current voltage converter which comprises a first voltage node, a second voltage node, a first switch, a second switch, a first diode, a second diode and a control circuit, wherein a first voltage exists between the first voltage node and a negative wire; a second voltage exists between the second voltage node and the negative wire; and the control circuit provides switching gate signals for the first and the second switches. The resonant switched capacitor direct current voltage converter further comprises a center-tapped inductor and a resonant capacitor, wherein the center-tapped inductor is connected between the first switch and the second switch; and the resonant capacitor is connected between the common node of the first and the second diodes and the central node of the center-tapped inductor. Compared with the conventional switched capacitor direct current voltage converter, the invention has the advantages of reducing complexity, loss and cost, improving the speed, and avoiding the limitation.

A method for synchronization and communication in a multi-hop network includes: transmitting a synchronization signal by a central node or a previously synchronized node, with a beacon slot assigned a beacon and the hop count value of the transmitting node transmitted in the frame of the synchronization signal, and, for all previously synchronized neighbor nodes of the transmitting node transmitting respective beacon slots and the hop count values in the frame of the synchronization; receiving by a first node the synchronization signal and the data transmitted in connection therewith; synchronizing the first node to the synchronization signal; detecting by the first node its neighbors and their respective beacon slot assignment and hop count values; determining the predecessor of the first node in the network by the first node in dependence of given criteria; storing by the first node the data received with the synchronization signal and data received in connection therewith and determined therefrom; and repetition the foregoing steps until synchronization of all the nodes.

One embodiment of the present invention provides a system that performs layer 3 (L3) aware switching in an Ethernet passive optical network (EPON) which includes a central node and at least one remote node. During operation, the system maintains a set of mapping information which indicates a correspondence relationship between a logical link identifier of a remote node, a medium access control (MAC) address for a subscriber coupled to the remote node, and an IP address for the subscriber. Upon receiving a packet which contains an IP address, the system selectively attaches a proper logical link identifier to the packet based on the mapping information and the IP address contained in the packet, thereby allowing only one proper remote node to receive the packet.

One embodiment of the present invention provides a system that facilitates bandwidth-efficient multicast in EPONs. The system includes a central node and at least one remote node. Downstream data from the central node is broadcast through a passive optical coupler to remote nodes. In the other direction, upstream data from a remote node is transmitted through the passive optical coupler to the central node in a unicast manner. During operation, the system first selects a common multicast LLID to represent a number of remote nodes that comprise a multicast group. Upon receiving a multicast message destined to the multicast group, the system sends the multicast message along with the multicast LLID for the multicast group, whereby the multicast message is broadcast through the passive optical coupler in the downstream direction. This allows each remote node belonging to the multicast group to receive the multicast message by matching the multicast LLID.

The invention provides a streaming media information distribution system and a method thereof and a user end. The system comprises a content distribution network central node, a content distribution network fringe node and a point-to-point autonomous domain; and the system conducts fragmentation processing to streaming media information requested by a user by a zone central server in the point-to-point autonomous domain or a point-to-point fragmentation module in the content distribution network fringe node and distributes to a user node. The invention takes a content distribution network as core content and point-to-point as the framework of service edge and conducts fragmentation processing to streaming media; and the framework of the system can effectively improve the service capability of the content distribution network without transforming the existing content distribution network or by slightly transforming the existing content distribution network.

This system is for efficient consumption of a consumable or resource such as electricity, gas or the like. Each consumer site, such as a household or business, has a consumer node. The consumer node gathers consumption data from one or more consumer devices consuming the consumable. A central node is in communication with the consumer nodes and determines a collective consumption of the consumable across the plurality of consumer sites. The central node participates in live markets in order to secure delivery of the consumable as required collectively across the plurality of consumer sites. The central node communicates market data conveying substantially live market effects to the consumer nodes, and the consumer nodes process the market data in a manner to influence consumption of the consumable, for example by deactivating devices during market peaks.

The invention discloses a system and method for implementing far-end real-time control. The method comprises the following step of setting a central node and rendering nodes at a network side, wherein the central node is used for finishing deployment of a game file in each rendering node, managing rendering node information and user information and allocates the appropriate rendering node for a user terminal and executes a game service; and the rendering nodes are used for receiving installation of game files allocated by the central node in local, receiving a control instrument sent by the user terminal through a network, operates the game file in local according to the control instrument, generates a corresponding game image, compresses the game image and sends the compressed game image to the user terminal. According to the scheme of the invention, occupancy and allocation dependence of the game operation on resources of the user terminal can be reduced, and the user terminal can be prevented from downloading and updating games frequently.

One embodiment of the present invention provides a system that facilitates dynamic allocation of upstream bandwidth in a passive optical network which includes a central node and at least one remote node. Each remote node is coupled to at least one logical entity, which corresponds to a device or a user, that transmits upstream data to the central node and receives downstream data from the central node. The central node is coupled to an external network outside of the passive optical network through a shared out-going uplink.

The invention discloses a cloud computing environment-based distributed network security pre-warning method, which belongs to the technical field of network security. The method comprises that: a plurality of management domains are set, wherein each management domain comprises a control central node and more than one security proxy node, and the control central nodes are in peer connection; the security proxy nodes discover abnormal events through peripheral equipment, extract event information, generate warning messages and transmit warning information to the corresponding control central nodes; the control central nodes receive the warning messages transmitted by the corresponding security proxy nodes and the other control central nodes and combine the central nodes meeting a combination condition into a task group; the security proxy nodes in the task group are in the peer connection and one security proxy node serves as a task coordination central node to coordinate the security proxy nodes in the group to complete tasks together; and the task group is in data connection with the control central nodes through the task coordination central node.

A central node sends a query indicating at least one key performance indicator (KPI) and a first KPI filter criterion to one or more edge nodes causing each edge node to cache subscriber data from each subscriber having a KPI value corresponding to the KPI. The central node receives subscriber data, responsive to the query, and aggregates the subscriber data according to each subscriber and the corresponding KPI value to yield an aggregated initial subscriber dataset and sends a subsequent query to each edge node that (for each edge node) indicates a subscriber from the initial subscriber dataset not returned by the edge node. The central node receives subsequent subscriber, responsive to the subsequent query, and aggregates the subsequent subscriber data with the initial subscriber dataset to yield a final subscriber dataset that indicates a total KPI value for each subscriber.

One embodiment of the present invention provides a system that reduces data burst overhead in an Ethernet passive optical network which includes a central node and at least one remote node, wherein downstream data from the central node is broadcast to the remote nodes, and wherein upstream data from a remote node is transmitted to the central node in a unicast manner. During operation, the central node transmits grant messages to a number of remote nodes, wherein a grant message for a specified remote node assigns a start time and a duration of a transmission timeslot in which the specified remote node may transmit an upstream data burst. In response to the grant messages, the central node then receives a number of upstream data bursts, wherein the time gap between two consecutive upstream data bursts is less than the summation of a default laser turn-on time, a default laser turn-off time, an AGC period, and a CDR period.

In a multinode data processing system in which nodes exchange information over a network or through a switch, the mechanism which enables out-of-order data transfer via Remote Direct Memory Access (RDMA) also provides a corresponding ability to carry out broadcast operations, multicast operations, third party operations and conditional RDMA operations. In a broadcast operation a source node transfers data packets in RDMA fashion to a plurality of destination nodes. Multicast operation works similarly except that distribution is selective. In third party operations a single central node in a cluster or network manages the transfer of data in RDMA fashion between other nodes or creates a mechanism for allowing a directed distribution of data between nodes. In conditional operation mode the transfer of data is conditioned upon one or more events occurring in either the source node or in the destination node.

The invention discloses one wireless sensor network communication method and system, which comprises the following steps: process center point sends broadcast in initial time and the point measures self and process center distance through the broadcast information; network point organism forms cluster structure and selecting cluster point front network gate and common point front cluster head in initial time; cluster member collects data in set time gap and sends to cluster head; the cluster head and front network gate transmit time gap data to process central point.

The invention provides a block chain safety storage method. The method makes each client-side Client have a name node, the data storage safety of a big data platform is greatly improved, the pressure brought by a centralized server is effectively avoided by adopting decentration design, and common apportion is performed through a whole privately-owned block chain network; Data Node of each data block of Hadoop is encrypted, and the safety of each data in big data is fully guaranteed. A data storage and management mechanism of the big data platform is further improved, a single mode relying on a central node is converted into a network environment jointly maintained jointly by all participants, and the decentration design is really achieved. By setting PKI and user permission, the shortcoming of simple and extensive plaintext storage of important data is broken through, and a safe and encrypted storage process and method are deepened.

A distributed web crawler system is suitable for the field of network information collection and comprises a management portal, a central node server and a distributed sub-node server, wherein the management portal is a Web interface provided for an administrator by the crawler system and can be used for viewing the logs of the central node server and the distributed sub-node server, setting and adding themes, updating a URL (uniform resource locator) seed of a theme, configuring a theme capture frequency parameter, and controlling a crawler state; the central node server and the distributed sub-node server are the main bodies of the system and can be used for operating the themes, learning a data extractor, analyzing pages and storing target pages. According to the distributed web crawler system, the capture of different themes can be accommodated by a crawler, the webpage capture speed is increased, and the quality meets the user requirement.

One embodiment of the present invention provides a method for facilitating asymmetric line rates in an Ethernet passive optical network (EPON) which includes a central node and at least one remote node. During operation, the system provides a downstream code-group clock, wherein each cycle thereof corresponds to a code group transmitted from the central node to a remote node. The system also provides an upstream code-group clock, wherein each cycle thereof corresponds to a code group received at the central node from a remote node. In addition, the system provides a multi-point control protocol (MPCP) clock, wherein the frequency ratio of the MPCP clock to the downstream code-group clock is different from the frequency ratio of the MPCP clock to the upstream code-group clock, thereby allowing the downstream transmission to be performed at a faster line rate than the upstream transmission line rate.

A system and method for performing file synchronization in multiple nodes. The system includes a central node (120), and a plurality of local nodes (100) connected with the central node by a common communications network (110). Each local node includes a local application server (101), a local file server (103), and a local database (104). The central node includes a central application server (121), a central file server (123), and a central database (124). A synchronization program (122) running on the central application server downloads updated copies of files from the local file servers, and uploads the updated copies of files to the central file server as latest editions of the files. A proxy (102) running on each local application server updates copies of files in its respective local file server, and downloads latest editions of files from the central node.

The invention discloses a distributive dynamic load management system and distributive dynamic load management method. The system consists of distributive processing clusters with dynamic load management function and P2P (Peer to Peer) complete equal frameworks. The processing clusters are not provided with central nodes controlled intensively but are provided with a plurality of processing nodes. Each processing node can independently provide distributive arbitral dynamic load management capacity and the nodes are completely same in right and dynamic load management function but same or different in event processing capacity. Each processing node is a control core of the dynamic load management system, and is provided with four modules, namely an event processing module, an event monitoring module, an event issuing module and a dynamic load management module. According to the system and the method, distributive dynamic load management can be realized under a distributive network environment, so that system load transfer fluctuation caused by change of data processing request hot spots and system load balance during node dynamic change can be effectively solved. The robustness of the system can be effectively ensured when the processing nodes of the distributive cluster system are overloaded under the P2P environment.

The invention discloses a method suitable for safely migrating data between storage clouds, belonging to the field of a distributed file system. The method comprises the following steps: SSL (Security Socket Layer) connection is set up between a source cluster and a destination cluster; central nodes of the source cluster and the destination cluster generate a secret key through the SSL connection, and the secret key is transmitted to a data node executing the data migration; an approved migration privilege bill is encrypted by the central node of the destination cluster, is then transmitted into the data node executing the data migration in the source cluster, and is recorded; the encrypted migration privilege bill is transmitted to the central node of the destination cluster through the data node executing the data migration to be verified, then the central node of the destination cluster transmits a destination data node address to the data node executing the data migration; and the data node executing the data migration encrypts data to be migrated by the secret key and then transmits the data to the destination data node. The method greatly improves the safety of the data migration between the storage clouds.

The invention discloses content metadata storing, inquiring method and managing system in content delivery network (CDN). In the CDN, nodes, except the CDN central node, are provided with hash functions, and the hash functions stored in each node define the corresponding relationship between content indentifying information and the address information of nodes in an autonomous system to which the mode belongs; when a new content is delivered to the nodes except the CDN central node, the node receiving the new content sends the metadata of the new content to the storing node for storage after mapping the identifying information of the new content to the address information of one storing node according to natively stored hash functions. The managing system is characterized in that in the CDN, the content metadata provided by each autonomous system is dispersedly stored in nodes of the autonomous system in the mode of distributed hashing table (DHT).