Nec Corporation

Masaharu Morimoto

Hayato Itsumi

Yohei Iizawa

Hiroaki Inoue

Kazuya Suzuki

Kiyohisa Ichino

Yu Okano

Tomohisa Yamabe

In an object tracking device, an object detection unit detects an object from video data using a plurality of object detection programs of different detection accuracy. The object tracking unit tracks the object from the detected position of the object by the object detection unit. The control unit controls the object detection programs used by the object detection unit based on the detection result of the object by the object detection unit and the tracking result of the object by the object tracking unit.

Object tracking device, object tracking method, and recording medium

Provided is a data analysis device comprising: an analysis subject acquisition part for acquiring data to be analyzed (analysis subject data); a precision estimation part for estimating the analysis precision of the analysis subject data; a selection part for selecting an analysis module to be used in analyzing the analysis subject data on the basis of the result of estimating the analysis precision of the analysis subject data and information indicating the analysis time of the analysis subject data; and an analysis execution part for analyzing the analysis subject data using the analysis module having been selected by the selection part. According to this configuration, in cases where a data analysis device configures a data analysis processing method, the operator of the data analysis device does not have to preset a determination standard for configuring the processing method.

Data analysis device, precision estimation device, data analysis method, and storage medium

A network-diagram rendering system for rendering a network diagram including nodes and links as elements of a network configuration is provided with: an index calculation unit () which calculates, for each node, an index indicating a degree that the node is a primary node in the network configuration, using network configuration information as information to be obtained from the network configuration; and a primary node coefficient setting unit () which sets a primary node coefficient for the node to be higher as the index increases, the primary node coefficient being a value indicating a degree of not changing a rendering position of a network diagram associated with a change in the network configuration.

Network-diagram rendering system, network-diagram rendering method, and network-diagram rendering computer readable medium

A control apparatus comprises: a network management unit that holds topology information and flow information; a network division unit that divides a plurality of switches into a core switch(es) and edge switches; a core network management unit that holds topology information about a core network including the core switch(es); an edge network management unit that holds topology information about an edge network including the edge switches; a core control logic that generates flow information based on the topology information about the core network and stores the flow information in the core network management unit; and an edge control logic that generates flow information based on the topology information about the edge network and stores the flow information in the edge network management unit. When the flow information about the core network or the edge network is generated, the flow information held in the network management unit is updated.

Network control apparatus, network system, network control method, and program

The objective of the invention is to enable sharing, between layers in a network in which the layers are used to perform communications, resource information and information required for using paths. A network control system includes: a lower layer information storage unit, a lower layer control information conversion unit, an upper layer information storage unit, an upper layer control information conversion unit, an integrated layer information storage unit and a layer integration unit. The layer integration unit integrates, as virtual links, the information of flows, which are representative of communications among terminals in the lower layer, with the network information of the upper layer, thereby constituting the network information of the integrated layer. Further, the layer integration unit performs reciprocal exchanges of network information among the integrated layer information storage unit, the lower layer information storage unit and the upper layer information storage unit, said reciprocal exchanges including a process of giving, as the attribute information of the ports of the upper layer, label information required for using the virtual link provided by the lower layer.

Network control system, control device, network information management method, and storage

A communication system includes: a network configuration memory that stores network configuration information of a first layer in which an area of the first layer whose low level configuration is desired to be concealed is represented by a preset symbol and that also stores network configuration information of a second layer showing the area represented by the preset symbol. The system also includes a network configuration management section that allows a first user to manage a network of the first layer using the network configuration information of the first layer and that also allows a second user to manage a network of the second layer using at least the network configuration information of the second layer.

Communication system, virtual network management apparatus, virtual network management method and program

A switch apparatus includes a storage storing a table, the table including rules and actions corresponding to the rules, and a controller including a memory storing instructions, and a processor configured to execute the instructions to receive the rules and the actions from a control apparatus, identify, based on the rules, a received packet, duplicate a part of a header of the identified packet as an additional header when the identified packet includes a target of encapsulation, encapsulate the identified packet by the additional header, and process, based on the actions, the identified packet.

Network system and network flow tracing method

A network appliance redundancy system includes: a first switch arranged upstream of two different models of network appliances each of which switchably operates in an active system and a standby system; a second switch arranged downstream of the two different models of network appliances; and a control apparatus comprising a translation rule management unit learning a header translation rule(s) of a network appliance operating in the active system on the basis of header information of a packet transmitted from the first switch and header information of a packet received by the second switch via the network appliance operating in the active system and instructing, when the appliances in the active and standby systems are switched, the second switch to rewrite header information on the basis of the header translation rule(s) so as to obtain the same output packet as that from the network appliance operating in the active system.

Network appliance redundancy system, control apparatus, network appliance redundancy method and program

In a flow-based network such as an open flow network system, even when a network appliance such as NAT and NAPT for translating a packet header is passed through, a correspondence relation of two flows before and after the passing can be grasped to make it possible to trace the flow in end-to-end. Specifically, a packet is encapsulated in a switch (or in a controller requested from the switch). By encapsulating by using the same header as a current header, two kinds of headers before the translation and after the translation are attached to the packet after the packet phases through the network appliance.

A central control verifying apparatus includes a plurality of quasi switches respectively corresponding to a plurality of switches in a network; a connection data managing section which manages connection data between the plurality of switches; and a verifying section. Each of the plurality of quasi switches is communicably connected with the network central control section through a control link. A requesting quasi switch of the plurality of quasi switch transmits a route setting request to the network central control section. A target quasi switch of the plurality of quasi switches receives the route indication data generated in response to the route setting request from the network central control section. The verifying section refers to the connection data and the route indication data received by the target quasi switch to verify whether or not a desired route setting is performed according to the route setting request by the network central control section.

Central control verifying apparatus, central control verification program, and central control verifying method

A switch transfers a predetermined packet to an appliance. The appliance generates a rewritten packet by carrying out the packet header rewriting on the predetermined packet and forwards the rewritten packet back to the switch. The switch transfers the rewritten packet received from the appliance to a controller. In a case when the rewritten packet meets a predetermined condition, the controller generates entry setting data which instructs to set a new entry on the basis of a destination of the rewritten packet and the predetermined rewriting mode, and sends the entry setting data to the switch. The new entry indicates that packets belonging to the same flow as the predetermined packet are transferred to the destination without being routed through the appliance. The switch adds the new entry to the flow table in accordance with the entry setting data received from the controller.

Network system, controller, and network control method

A proxy apparatus includes a multi-core CPU comprising a plurality of CPU cores; and an extended listen socket comprising a plurality of queues provided for the plurality of CPU cores respectively. A kernel thread and a proxy thread operate on each of the plurality of CPU cores. The kernel thread executes a receiving process of an establishment request packet of a first connection with a client terminal, assigned to a corresponding one of the plurality of CPU cores, and registers an establishment waiting socket which contained information of the first connection, on a corresponding one of the plurality of queues. The proxy thread refers to the corresponding queue, and establishes the first connection based on the establishment waiting socket when the establishment waiting socket is registered on the corresponding queue.

Proxy apparatus and operation method thereof

Provided is a socket library for monitoring that allows the communication data of a process A to be easily shared by the other processes by way of a socket API. The gateway device uses a socket library for monitoring in which communication content of an application can be shared by a plurality of other applications, the gateway device including a shared memory space provided in the socket library for monitoring; a listen socket controlling section provided in the shared memory space, the listen socket controlling section being for storing a listen socket of an owner process; a process controlling section provided in the shared memory space, the process controlling section being for transmitting and receiving the owner process and the monitoring process; a connected socket controlling section provided in the shared memory space, the connected socket controlling section being for storing a connected socket; a session controlling section for storing a communication session; and a message controlling section for storing communication data that have been actually transmitted and received.

Gateway device having socket library for monitoring, communication method of gateway device having socket library for monitoring, and communication program of gateway device having socket library for monitoring

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Tokyo, Japan

Masaharu Morimoto