351 results about "Balancing network" patented technology

A content delivery and global traffic management network system provides a plurality of caching servers connected to a network. The caching servers host customer content that can be cached and stored, and respond to requests for Web content from clients. If the requested content does not exist in memory or on disk, it generates a request to an origin site to obtain the content. A DNS Server load balances network requests among customer Web servers and directs client requests for hosted customer content to the appropriate caching server. The customer pays a service that provides the content delivery and global traffic management network system a fee for usage of the content delivery and global traffic management network system.

An admission control and load balancing system controls admission of packet streams or calls to a network and balances the packet traffic across the network, improving quality of service. The system includes a central database which stores information including cost data associated with individual paths and links across the network. A processor, in communication with the database, coordinates the admission control and load balancing decisions, and updates of the database cost data to reflect the dynamic network conditions, based on input from appropriate data sources. In one embodiment, referred to as the exact algorithm, the database is consulted by the admission control points or gatekeepers prior to admitting each arriving packet stream, and the database contents are updated call-by-call to reflect the allocation of resources to each admitted stream. In another embodiment, referred to as the inexact algorithm, control decision as well as database updates occur on a periodic rather than on a call-by-call basis to promote better scalability. In this embodiment, the processor periodically calculates admission decisions based on cost data in the central database. These admission decisions are then periodically forwarded to a satellite database associated with each gatekeeper, for storage and use in admission decisions until the next update epoch.

A method for balancing load among firewall security devices in a network is disclosed. Firewall security devices are arranged in multiple clusters. A switching device is configured with the firewall security devices by communicating control messages and heartbeat signals. Information regarding the configured firewall security devices is then included in a load balancing table. A load balancing function is configured for enabling the distribution of data traffic received by the switching device. A received data packet by the switching device is forwarded to one of the firewall security devices in a cluster based on the load balancing function, the load balancing table and the address contained in the data packet.

A series of methods of driving multiple LED devices with high efficiency balancing technique is disclosed. The regulation of the LED current is accomplished by switching operation to compensate the difference of the LED operating voltage. Reactive components are also employed to construct non-dissipative balancing networks to drive multiple LED strings with low losses. Additionally, a series of concept is presented to drive the LED devices from PFC voltage directly with low cost circuit architecture.

A radio front end includes an antenna tuning unit, a duplexer, a balancing network, and a processing module. The antenna tuning unit is operably coupled to an antenna and operable to tune an operational characteristic of the antenna based on an antenna tuning signal. The duplexer is operably coupled to the antenna tuning unit and operable to provide electrical isolation between an outbound wireless signal and an inbound wireless signal. The balancing network is operably coupled to the duplexer and operable to establish an impedance that substantially matches an impedance of the antenna. The processing module is operable to estimate the impedance of the antenna to produce an estimated antenna impedance and to generate the antenna tuning signal based on the estimated antenna impedance.

A system for balancing network loads among a group of computer servers. A load balancing module is provided for each server and includes multiple network ports for receiving network traffic and coupling messages to its server or to another module. The interconnect map for the modules is automatically determined by a topology discovery system and maintained by a topology update system. Each module monitors the loading and health of its server and provides this information to the other modules. One or more master modules are directly connected to an external network and route received traffic to their own servers and other servers through other modules or a networking switch based on a priority system. The priority system may be based on dynamic conditions of server capacities and current loading.

The invention discloses a method, device and system of voting super node, searching for network node or resource, it used to resolve problem of poor stability of network induced by unbalanced load and checking node in local part, in the scheme, the common node in network compares the property parameter value with said threshold value set by said condition based on condition that common node becomes to super node, and when it assures that property of this node fulfills the condition of super node, it sends message that the node becomes super node; and when searching for network node or resource, super node is first checked; adopting the invention can balance network load, increase the efficiency of searching for node and stability of network.

A method and system for directing data packets from an origin node to a destination node in a multipath communication network having a plurality of nodes, where each node is connected to at least one other node by links. The apparatus includes a processor for obtaining cost information relating to each link in the network and for determining the least-cost route between the origin node and the destination node based on the cost information relating to each link. The processor establishes a cost margin representing a range of costs above the cost of the least cost route and identifies one or more alternate routes. A data storage device stores the cost information, and a network interface selectively routes the data packets through one or more of the least cost route and the one or more alternate routes falling within the established cost margin thus balancing the network load and providing alternate data paths in case the least-cost path is unavailable.

To reduce power consumption and heat generation, an active idle system is proposed that monitors for an idle period and then, after a predetermined time, initiates a silent period. During the silent period data and idle frames are not transmitted. During the silent period, one or more transceiver components may be turned off or forced into some other power saving mode. The predetermined time may be any amount of time and is selected to balance network usage and power savings. Periodically during the silent period, such as at predetermined times, one or more sync or idle frames are transmitted. Received sync or idle frames are processed to maintain receiver settings, synchronization or equalizer adaptation. Restoring active data communication may occur by monitoring the channel during silent periods for a request or only during the predetermined times when sync or idle frames are sent.

A power conversion apparatus, comprising: a power conversion circuit comprising an AC source; a power conversion unit with DC terminals and AC terminals; a filter inductor unit including first and second terminals, the first terminals of the filter inductor unit being connected to the AC source, the second terminals of the filter inductor unit being connected to the AC terminals of the power conversion unit; a common mode noise suppression circuit comprising a capacitive impedance network including first and second terminals; an impedance balancing network including first and second terminals; the second terminals of the capacitive impedance network are connected to the first terminals of the impedance balancing network, the first terminals of the capacitive impedance network are connected to the first terminals of the filter inductor unit, and the second terminals of the impedance balancing network are connected to the DC terminals of the power conversion unit.

A method for balancing network load among mobile hosts includes determining and monitoring a performance of a first access point connected to a mobile host by an infrastructure network, determining that the performance of the first access point is undesirable, and virtualizing a network interface of the mobile host connected to the first access point, wherein an ad hoc network are established in addition to the infrastructure network. The method further including determining a route to a second access point through at least one cooperating mobile host, and switching a connection of the mobile host to the second access point via the route to the second access point, wherein the connection is established via the ad hoc network.

The invention relates to a network load balancing method based on energy information of a wireless sensor, comprising the following steps: (1) Sink broadcasts an energy report message; (2) nodes receive an energy report of the Sink and then update and maintain local load forwarding tables; (3) the load allocation proportion born by various forwarding nodes and the load born by the various nodes are calculated; (4) the message is forwarded when local nodes are far away from convergent nodes compared with the forwarding nodes or are brother nodes of the same layer with the forwarding nodes; (5) various field values in the message are modified by self energy information and the message is forwarded to all the lower-level neighboring nodes or all the brother nodes of the same layer except the forwarding nodes; (6) when all the nodes receive the energy report message, the message forwarding is stopped; (7) after the energy report message is forwarded within a single period, propagation paths which reversely use the energy report message establish a load convergent route from sensing nodes to the convergent node Sink hop by hop; and (8) the convergent node Sink periodically sends out the energy report message and completes allocation and convergence of sensing data. The method solves the problems of network load balancing and network life cycle of a large-scale wireless sensor.

We propose an efficient procedure, namely disjoint pair procedure based cloud service embedding procedure that first maps working and backup virtual nodes over physical nodes while balancing computational resources of different types, and finally, maps working and backup virtual links over physical routes while balancing network spectral resources using the disjoint pair procedure.

A system that drives multiple MOSFETs in parallel for direct current and alternating current solid state power controller applications may include networks connected to the gates of the MOSFETs to protect the MOSFETs from being damaged during high current interruption. For direct current applications, the system may include a switching protection and damping network and a gate drive balancing network. For alternating current applications, the system may include two switching protection and damping networks and a gate drive balancing network.

A method and system for determining an output port upon which to transmit a packet in a router having a plurality of output ports adapted to be coupled with an adjacent router. In one embodiment, a list is created of output ports that are coupled with the adjacent router, and the list is modified based on network traffic. A port is selected from the list of ports, and the packet is transmitted over the selected port. In one example, the list is modified continuously as a background process based on network traffic. The list may be modified by determining a port which is under-utilized, determining a port which is over-utilized, and substituting in the list one or more instances of the port which is over-utilized with one or more instances of the port which is under-utilized. In this manner, a router can adaptively and evenly distribute the packet transmission traffic over the output ports.

The invention discloses an energy adaptive charging method combined with geographical location routing in WRSNs. The energy adaptive charging method is used for ensuring that all nodes in the networks can be supplemented with electricity in time to balance network energy and prolong the network life cycle. Charging characteristics of a charger and geographical location information of the nodes are combined to design a routing protocol, and on the basis of determining the algorithm routing protocol, according to the actual energy distribution situation in the networks, the nodes with larger energy consumption are supplemented with more energy to balance the network energy by adjusting the moving speed of the charger. Therefore, the network service life can be effectively prolonged, sufficient rest of the charger can be ensured, and the charging efficiency is improved.

A system and method identifies the costs to be assigned to each link in a network that can more evenly balance the utilization of links in the network.

The invention discloses a mobile charging method based on clustering and energy relay in WSNs. The method comprise the following steps: firstly, nodes of the whole network are clustered, a cluster head is selected according to the energy consumption speed of the node, the residual energy and the distance from the base station node, and the corresponding cluster radius is computed, wherein the cluster head node is used as a resident point of the charger for performing energy transmission and data collection; secondly, the base station plans the corresponding charging path according to a charging request sent by the node, and dispatches a charger to charge the node; the node in the cluster performs the effective energy transmission through an energy relay way; when the nodes needs the emergency charging, the base station can determine the charger in response to a node emergency charging request. The charging process and the data collection process are combined, the data is divided into the sensitive data and insensitive data, and the different collection strategies are adopted. By using the mobile charging method disclosed by the invention, the energy consumption among the clusters in the network can be balanced, the charging validity and the network expandability are improved, thereby maximizing the network life.

In a wireless sensor network, the coverage degree of a target area and the energy consumption of the network are important indexes for measuring the property of the wireless sensor network. The reasonable arrangement of nodes is in favor of ensuring the network coverage and balancing the energy consumption of the network. Specific to the wireless sensor network with an adjustable node sensing distance, the invention provides a balancing optimizing strategy for the energy consumption of the coverage of the wireless sensor network. According to the strategy, meeting a certain coverage quality of network area is taken as a condition, the balancing of the energy consumption of the coverage is taken as an optimizing target, and a particle swarm optimization is adopted for firstly dynamically optimizing the layout of the nodes in the network and then accordingly and reasonably adjusting the node sensing distance, thereby causing the property of the energy consumption of the coverage of the network to be optimal. A simulated result shows that compared with a traditional energy-saving coverage scheme, the strategy has the advantages that the sensing overlapping area and the sensing blind area are effectively reduced, the coverage quality of network area is increased and the energy consumption of the network is reduced.

The invention relates to a credible security route of a wireless sensor network on the basis of a quantum ant colony algorithm. A method for determining the route specifically includes steps of 1), setting initial information elements; 2), determining a credibility function; 3), selecting paths; 4), recording and updating the optimal solution; 5), updating the information elements; 6), jumping to the step 3) to repeatedly implement the steps until iteration is terminated; and 7), outputting the optimal solution. As shown by analysis, the method for determining the route is superior to the traditional ant colony algorithm in the aspects of convergence rate and global optimization, energy consumption of network nodes can be globally balanced, the network is prevented from being divided into a plurality of islands due to premature death of certain critical nodes, and the credible security route can effectively resist energy black hole attack such as Wormholes attack which is typical for the wireless sensor network, and is beneficial to building a credible network environment.