456 results about "Network clustering" patented technology

The invention is directed to network management systems and methods that provide substantially real-time network management and control capabilities of multimedia streaming traffic in telecommunications networks. The invention provides pre-emptive and autonomous network management and control capabilities, and may include shared intelligence of embedded systems—Heterogeneous Sensor Entities (HSE) and the Sensor Service Management (SSM) system. HSEs are distributed real-time embedded systems provisioned in various network elements. HSEs performs fault, configuration, accounting, performance and security network management functions in real-time; and real-time network management control activations and removals. SSM facilitates automated decision making, rapid deployment of HSEs and real-time provisioning of network management and control services. The service communication framework amongst various HSEs and the SSM is provided by the Heterogeneous Service Creation system. The proposed network management procedure provides real-time network management and control capabilities of multimedia traffic in wireless networks and clusters of independent networks respectively.

The present invention facilitates cluster formation within a communications network by utilizing network topology information to designate network nodes that are crucial for relaying traffic as cluster head nodes, while remaining network nodes are designated as member nodes. A beacon packet transmission rate of a network node or the interval between successive beacon packet transmissions by that node is adjusted by the present invention to facilitate cluster formation independent of network size and varying initial start times of network nodes. In addition, the present invention utilizes the above described cluster formation technique to form a three tier architecture for transmission or flooding of routing information from head node databases throughout the network. The cluster formation technique is applied to cluster head nodes to form an additional network tier of super nodes that distribute routing information, while cluster head nodes route network data traffic. The databases of cluster head nodes are examined subsequent to flooding of head node database information by super nodes, where data missing from a head node database is requested from a corresponding super node, thereby eliminating transmissions of acknowledgment messages.

A system, method and computer program for enforcing network cluster proximity requirements using a proxy is useful in preventing unauthorized devices from receiving encrypted broadcast content intended for only authorized users within a network cluster. The current art allows users to remotely establish trust via a cryptographic handshake. This results in encrypted broadcast content being delivered to unauthorized devices. The present invention assures that encrypted broadcast content is delivered to only authorized devices, allowing authorized remote devices to receive encrypted broadcast content while preventing unauthorized remote devices from doing so. The present invention enforces network proximity requirements to authorized devices within a defined area by timing the cryptographic handshaking, and by authorizing device proxies within a geographic area for retransmitting to authorized remote devices outside said geographic area.

The invention discloses a routing method for the wireless sensor network with efficient energy, which is suitable for the layered sensor network structure. The routing method is composed of initialization, cluster building, adjacent clusters routing and routing maintenance, wherein, an initialization process of the protocol makes a Sink node obtain a topology and network average energy of the sensor network, and each node obtains hop counts from the node to the Sink node; in the stage of the cluster building, a repeated division method is used to divide sensor network clusters, the divided clusters are even, and a leader cluster node is undertaken by nodes with higher residual energy; the adjacent clusters routing uses an ant colony algorithm to determine the probability of using a link to send information according to the link pheromone concentration, and the link pheromone concentration is increased with the information transmission on the link and is reduced with the time going; and the routing maintenance stage is responsible for updating link pheromone concentration, and makes the nodes inside the cluster with higher residual energy undertake the leader cluster in turn. The routing method can reduce the consumption of the network total energy, can balance the consumption of the node energy and can prolong the network life cycle.

The invention relates to one efficient wireless sensor network topological control method, which combines topological control cluster division method and power control method and comprises the following steps: a, dividing the network clusters and selecting cluster head point; b, forming cluster inner network; c, processing power control on cluster point to form final network topological structure; after failure, re-establishing network topological structure.

A cluster-based, delegated software upgrade scheme facilitates software upgrade for radio base station nodes comprising a cluster of a flat radio access telecommunications network. The plural radio base stations are grouped into clusters (30), and a master radio base station (RBS_M) designated for each cluster. The master radio base station (RBS_M) is used to initiate software upgrade of the radio base stations comprising the cluster. The master radio base station (RBS_M) can also perform a monitoring of implementation of the software upgrade at the radio base stations of the cluster, and on the basis of the monitoring, determine whether a cluster-wide software upgrade is successful. In one of its example modes, the master radio base station can further prepare a software upgrade report which confirms/summarizes implementation of the software upgrade at the radio base stations of the cluster.

The invention discloses a clustering method for the in-vehicle Ad hoc network based on the signal strength, and provides a network clustering and maintaining method which starts with the vehicle directional information, and enables the vehicles running along the same direction to participate in the process that the same cluster is formed and maintained. After a node is initialized, tentative cluster-heads are established among the vehicles running along the same direction, neighbor linked lists are formed in the two-hop range of the tentative cluster-heads, the node which has the maximum nodal connection signal strength is a cluster-head node, and other nodes are common nodes or gateway nodes of the cluster; the maintenance process is based on the vehicle directional information and the nodal connection signal strength. As considering the vehicle directional information and the nodal connection strength signal, the invention has the advantages that the in-vehicle Ad hoc network clustering structure is stable by comparing with other methods under the urban traffic environment, the node alternating times and the clustering related control information quantity are less, the problem that the in-vehicle Ad hoc network performance is low under the urban traffic environment is solved, the cluster service life is prolonged, and the network state is improved.

Applications can be deployed concurrently across a network cluster by utilizing a phased approach to deployment. A preparation operation is invoked each node on which an application is to be deployed. The preparation operation can utilize two phases, in which the deployment descriptors for an application are analyzed and in which each node is initialized for deployment. For each node that is successfully initialized, an activation phase is started in which the node is informed that it should prepare for requests on the application. The deployed application is then started on each successful node. For each node on which the preparation operation was unsuccessful, the deployment can be rolled back or attempted again.

A method includes determining, at a first device of a neighbor aware network (NAN), a proximity of the first device to a second device of the NAN. The method further includes determining whether to change a NAN operating mode of the first device based on the proximity.

The invention provides an electric vehicle intelligent interactive charging network cluster system, comprising multiple electric vehicle charging post nodes (11,..., 1N), multiple electric vehicles (21,..., 2N), an electric vehicle charging post cluster central control node (10), a grid control management system (30), and a user information service system (31). The electric vehicle charging post node (1N) is connected with the electric vehicle (2N) to charge the power batteries of the electric vehicle; the electric vehicle charging post cluster central control node (10) and the electric vehicle charging post nodes (11,..., 1N) realize networking connection by means of wireless Zigbee communication; the power system control management system (30) and the electric vehicle charging post cluster central control node (10) are connected by means of Internet wired communication or GPRS (general packet radio service), CDMA (code division multiple access) and WIFI (wireless fidelity) wireless communication; and the user information service system (31) and the electric vehicle charging post cluster central control node (10) realize wireless connection by means of GPRS, CDMA and WIFI.

The invention relates to the technical field of computer security, and in particular to a security defensive system and a defensive method based on a software-defined network. The security defensive system comprises a network control module, an attack analysis module, a progress detection module and a network flow detection module, wherein the network control module is used for intercepting a network data packet between virtual machines and used for forwarding acquired flow information to the attack analysis module; the attack analysis module is used for receiving flow information from the virtual machines of the network control module, used for scheduling the progress detection module to detect whether the progress is questionable, and used for scheduling the network flow detection module to execute deep detection on questionable flow if necessary. Aiming at expansion of virtual switches for flow forwarding among virtual machines in a conventional virtual machine server, the invention discloses a deep defensive system which is capable of intercepting, detecting and reorienting the flow, and the purposes of preventing and stopping attack behaviors of virtual machines of a network cluster are achieved.

An IPv4 host is able to maintain connectivity within an access network while moving among access points of the access network, based on receiving a unique assigned IPv4 address from a clusterhead of the access network. Any DHCP request by the IPv4 host is sent via the connecting access point to the clusterhead. The clusterhead, providing connectivity for hosts in the access network to a wide area network based on respective entries, assigns the IPv4 address to the IPv4 host, based on storing an entry including the IPv4 address and an IP-based identifier of the connecting access point, and sends a DHCP response to the IPv4 host via the connecting access point. A second DHCP request from the IPv4 host to a second access point causes the clusterhead to update the entry with the second access point identifier, enabling the IPv4 host to continue use of the assigned IPv4 address.

The invention belongs to the technical field of a wireless sensor network system, and discloses a wireless sensor network data transmission method based on a LEACH protocol. By setting an energy threshold Va, a data transmission process is divided into whole-network cluster head election and in-cluster cluster head election; when energy is smaller than the energy threshold Va in all cluster heads, a whole-network election method is adopted, so that each node in a region has the chance to become a cluster head; and when energy is greater than the energy threshold Va in all the cluster heads, in-cluster election is carried out, new in-cluster cluster heads are selected according to constraint conditions of residual energy, a node density and a distance to an in-cluster mass center, a structure of a cluster is unchanged, and a non-cluster-head node is elected in the cluster to be used as a new cluster head. According to the invention, by an optimal cluster head rate of a wireless sensor network, all subsequent simulation experiments can be carried out, and various practice scenes can be more accurately and reliably simulated.

A network cluster is provided herein having a plurality of cluster members. In order to control the admission of client requests sent to the cluster, one member of the cluster is elected “reservation coordinator.” The reservation coordinator runs a reservation algorithm for controlling the distribution of rate capacity across members of the cluster. For example, each member of the cluster may reserve some amount of rate from the coordinator to allow for passing of client requests. To ensure that each member is provided with the appropriate rate capacity, each member of the cluster runs an estimation algorithm to determine whether or not additional rate capacity should be reserved from the reservation coordinator, or released back into the cluster for redistribution. The estimation algorithm is run in real-time and allows the admission control algorithm to adapt to changes in rate distribution.

The invention discloses a multi-channel video playing and large-screen display method, which comprises the following steps: (1) starting a main control computer and a player in a computer network cluster; (2) opening multi-channel video playing software, establishing a video file which needs to be played, and selecting an operating mode by the multi-channel video playing software according to information such as configuration parameters, the attribute of the video file, and the attribute of output equipment; (3) entering a blocking mode for the multi-channel video playing software which operates on the player, synchronously playing the video file at the position specified by the main control computer until the main control computer is started to send an instruction of beginning playing, and continuously playing, and outputting images generated by the player to display equipment, and finally outputting the images to a large screen to be spliced into an intact picture; and (4) when the main control computer resends a synchronous instruction of playing, resynchronizing the playing position of the video file on the multi-channel video playing software which operates on the player until the playing of a video is finished or a user manually exits from the video playing software.

The invention discloses a user abnormal behavior detection method based on neural network clustering. The method comprises: firstly, performing SVD decomposition and denoising on a behavior data set matrix of a user, and inputting the denoised matrix to an input layer of a neural network, and then calculating weight of all attributes of each user in a hidden layer of the neural network, and standardizing the weight, outputting the weight in an output layer, and finally respectively calculating similarity value of each user and each user in a normal behavior model database and a threshold value, if the similarity value is larger than the threshold value, behavior being abnormal behavior, and carrying out corresponding prompt and precautionary measures, otherwise, the behavior being normal behavior, and combining the behavior in the normal model database to upgrade the database in real time. Through cooperation of each part, the method effectively realizes high detection rate and low false alarm rate.

A server for deploying virtual machines (VMs) in a network cluster is provided. The server sets template information for creating VMs, creates a VM based on the template information, receives an IP address assigned to the VM by a dynamic host configuration protocol (DHCP), and deploys the VM into the network cluster. The server then monitors a resource utilization ratio of the network cluster. When the ratio of the network cluster is more than a first preset ratio, the server creates a new VM based on the template information and deploys the new created VM into the network cluster. When the ratio of the network cluster is less than a second preset ratio , the server decreases available resource of the network cluster by suspending or deleting a created VM in the network cluster.

A network includes a plurality of network clusters. Each network cluster includes a plurality of nodes. At least one of the plurality of nodes includes a portal node. A portal node is a node with at least one link that crosses a boundary of the network cluster. Each portal node is configured to communicate detection packets for detecting the existence of other portal nodes within the network cluster. Each portal node is configured to communicate with nodes within the network cluster associated with the respective portal node to indicate that the respective portal node is a predetermined number of hops away from a virtual root bridge associated with the network cluster.

The invention provides a measurement and control communication method and a measurement and control communication system based on a low-altitude unmanned aerial vehicle self-network, which are wide in acting coverage range and can realize cooperative matching and dynamic stabilization. The method comprises the steps of performing self-network clustering on low-altitude unmanned aerial vehicles at different heights in different regions; respectively linking the low-altitude aerial vehicles to an airborne communication platform and a ground communication terminal by taking a cluster as a unit; regularly updating and maintaining clusters in the low-altitude unmanned aerial vehicle self-network. The system comprises the airborne communication platform and a plurality of low-altitude unmanned aerial vehicles; the space-based communication platform is communicated with the low-altitude unmanned aerial vehicles, the ground communication terminal and other airborne communication platforms; the low-altitude unmanned aerial vehicles carry task loads and are used for being communicated with the airborne communication platform, the ground communication terminal and other low-altitude unmanned aerial vehicles. The airborne communication platform and all the self-networked low-altitude unmanned aerial vehicles are organized to form a two-layer composite three-dimensional information network. Therefore, the integral efficiency of the system is improved, and the stability is high.