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36 results about "Direct neighbor" patented technology

Centralized service based distributed peer-to-peer network implementing method and system

The invention relates to a distributed peer-to-peer network based on concentration service and a construction method thereof, wherein, the method includes the following steps: (1) establishing a concentration server for the peer-to-peer network, which is used for adding the peer-to-peer network for a new node and providing service for the exit of the peer-to-peer network and defining a data structure of a B plus tree for the server so as to save the information on a dynamic and variable node; (2) adopting a new node to search a direct neighbor through a concentration server or search the direct neighbor in a virtual link from a peer node and add the direct neighbor into a peer-to-peer network ; (3) applying a boundary node (a peer node with a precursor or a successor exiting from the direct neighbor) to search a direct precursor or a successor neighbor through the concentration server or search the direct precursor or the successor neighbor in the virtual link from the node, so as to maintain ring-shaped topology among the peer nodes. The invention integrates the concentration service in the distributed peer-to-peer network, thus obviously decreasing network fluctuation due to frequent entering or exiting of the node and greatly increasing the work efficiency of the peer-to-peer network.
Owner:BEIJING JIAOTONG UNIV

Fraud number identification method based on graph embedding

The invention discloses a fraud number identification method based on graph embedding. The method comprises the following steps: calculating a call characteristic index of a user based on a call signaling of the user in a period of time, forming a call characteristic index vector of each user, and extracting a contact person having a call relationship with the user in a period of time as a directneighbor of the user to form a direct neighbor group of each user; constructing and training a graph for identifying the fraud number, embedding the graph into a neural network, inputting conversationcharacteristic index vectors of a target user and a plurality of associated users, and outputting label information for identifying whether the number of the target user is a suspected fraud number or not; and inputting the call characteristic index vectors of the target user to be identified and the plurality of associated users into the trained graph, embedding the graph into the neural network, and then judging whether the target user number to be identified is a suspected fraud number according to the output. The invention belongs to the technical field of information, and can realize accurate identification of a fraud number based on a multi-point-point communication relationship structure mode of a fraud phone.
Owner:NAT COMP NETWORK & INFORMATION SECURITY MANAGEMENT CENT +1

Dynamic power control method in low-duty-cycle sensor network

The invention provides a dynamic power control method in a low-duty-cycle sensor network. The method comprises following steps of initializing node parameters after network nodes are deployed; evaluating wireless link qualities among the nodes according to a neighbor discovery process; exchanging dormant schedules of the nodes; according to a delay evaluating model and an energy consuming model, calculating single hop dormant delays and expected energy consumptions from a current node to direct neighbor nodes; according to the single hop dormant delays and the expected energy consumptions, through utilization of a dynamic planning method, recursively building transmission control tables; according to the transmission control tables, through routing, dynamically selecting node paths with minimum end-to-end delays and end-to-end energy consumptions to a base station node, and sending target data packets through the selected node paths. According to the method, through adoption of dynamic power adjustment and combination of topology extension of output powers, on the basis of the dynamic planning method, the routing path with the minimum delay is selected; it is unnecessary to change the existing dormant period of the nodes; the end-to-end transmission delay is ensured; and balance and optimization between the delay and the energy consumption are realized.
Owner:JINAN UNIVERSITY

Centralized service based distributed peer-to-peer network implementing method and system

The invention relates to a distributed peer-to-peer network based on concentration service and a construction method thereof, wherein, the method includes the following steps: (1) establishing a concentration server for the peer-to-peer network, which is used for adding the peer-to-peer network for a new node and providing service for the exit of the peer-to-peer network and defining a data structure of a B plus tree for the server so as to save the information on a dynamic and variable node; (2) adopting a new node to search a direct neighbor through a concentration server or search the direct neighbor in a virtual link from a peer node and add the direct neighbor into a peer-to-peer network ; (3) applying a boundary node (a peer node with a precursor or a successor exiting from the direct neighbor) to search a direct precursor or a successor neighbor through the concentration server or search the direct precursor or the successor neighbor in the virtual link from the node, so as to maintain ring-shaped topology among the peer nodes. The invention integrates the concentration service in the distributed peer-to-peer network, thus obviously decreasing network fluctuationdue to frequent entering or exiting of the node and greatly increasing the work efficiency of the peer-to-peer network.
Owner:BEIJING JIAOTONG UNIV

An optimal one-way communication path selection method between wireless sensor network nodes

The invention discloses an optimal unidirectional communication path selection method between wireless sensor network nodes. The method comprises the following four steps: a node broadcasts a relative hop test packet, and the node and a direct neighbor node thereof calculate a relative hop; the node broadcasts an optimal unidirectional communication path detection packet, and other nodes determine a minimum hop from a packet sending node to itself, an optimal unidirectional communication path and the relative hop; other nodes send an optimal unidirectional communication path notification packet to the packet sending node; and the node requests a specific node to send the optimal unidirectional communication path detection packet by a path detection packet request sending message to obtain the optimal unidirectional communication path information from the specific node to itself. According to the optimal unidirectional communication path selection method disclosed by the invention, the irregularity of the communication radiation range of the nodes and the inconsistency of node distribution are fully considered, the unidirectional communication path between the nodes is selected in combination with the minimum communication hop and the relative hop, the optimal unidirectional communication path is selected, the performance is stable, and the cost is reduced.
Owner:THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA
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