Nec Corporation

Kiyohisa Ichino

Satoshi Kamiya

Noriaki Kobayashi

Norio Yamagaki

Masato Yasuda

Hiroaki Inoue

Yoshinori Miyamoto

Masaharu Morimoto

Toshiya Okabe

Akihiro Motoki

A power identification device at least includes a measurement information acquisition unit for acquiring the amount of power generation by a power producer and the amount of power consumption by a consumer respectively as measurement information, a rule management unit for managing a generation rule for generating attribute information, a distribution rule and a loss rule for distributing the attribute information to the consumer, the attribute information containing a primary attribute related to each of the amount of power generation and the amount of power consumption and an additive attribute related to the amount of power generation, an attribute computation unit for generating the attribute information from the measurement information based on the generation rule and distributing the attribute information from the power producer to the consumer based on the distribution rule and the loss rule, and an attribute output (visualization) unit for outputting the attribute information to the outside.

Power identification device, power identification method, and non-transitory computer readable medium storing power identification program

[Problem] To provide a power router, a power transmitting and receiving system, a power transmitting and receiving method, and a storage medium storing a power transmitting and receiving program capable of automatically selecting a power supply destination in accordance with a power supply amount. [Solution] Based on power consumption information indicating the power consumed by loads and priority information indicating the priority of the loads, a power supply destination selection means () selects, from among the loads, a supply destination of the power supplied from a power supply source, said power consumption information and said priority information being stored in an information storage means (). A power transmitting and receiving means () supplies the power received from the power supply source to a load selected by the power supply destination selection means ().

Power router, power transmitting and receiving system, and power transmitting and receiving method

At least one grid () distributes power to a consumer (). The grid () transmits power to the other grid (). A grid integrated control apparatus () includes a supply and demand energy information receiver unit () that receives supply and demand energy information indicating a difference between energy supplied to the other grid () and energy supplied from the other grid () with respect to each grid (), a cost information receiver unit () that receives cost information indicating a power transmission cost between the grids (), and a grid control unit () that determines a transmitted energy between each grid () so as to reduce the total of power transmission costs while satisfying power demand of each grid (), on the basis of the supply and demand energy information and the cost information.

Grid integrated control apparatus, grid control system, grid control apparatus, program, and control method

Disclosed is a power network system etc. which can safely detach a power router whose communication with a control apparatus becomes interrupted, from other power routers and power cells, the power network system including a second control apparatus controlling one of or plural of the power cells, when the second control apparatus detects abnormality in communication between the apparatus itself and the power router, the second control apparatus performs control so as to stop transmission/reception between the power router in which the abnormality is detected and another power router which is connected to the power router, and when the first control apparatus included in the power router detects abnormality in communication between the power router and the second control apparatus, the first control apparatus performs control so as to stop transmission/reception of the power conversion leg connected to the another power router.

Power network system, power control method, power router, control apparatus, and storage medium

The purpose of the invention is to provide a guideline for, when adding a new power cell to a power network, solving the problem of how to set an operation mode of a power conversion leg. Assuming that a power conversion leg (JRL) of the power router (JR) of a power cell (J) and a power conversion leg (KRL) of the power router (KR) of a power cell (K) are connected to each other and power is transferred from the power cell (J) to the power cell (K) when the utility grid breaks down, the leg operation modes of the leg (JRL) of the power router (JR) and leg (KRL) of the power router (KR) are set as follows: the power conversion leg (JRL) of the power router (JR) is set to a stand-alone mode; and the power conversion leg (KRL) of the power router (KR) is set to a designate power transmission/reception mode when the utility grid does not break down and to a master mode from the designate power transmission/reception mode when the utility grid breaks down.

Power network system operation method

A packet retransmission control device has a flow table and a processing determination unit. The flow table indicates, with respect to each of flows to which packets belong, retransmission management information for managing retransmission control. The retransmission management information includes, as a retransmission management parameter, at least one of a packet retransmission count and a delay excess count. The processing determination unit refers to the flow table to determine whether or not to apply the retransmission control to packets. Specifically, when receiving a packet from the upper layer, the processing determination unit refers to the flow table to obtain the retransmission management parameter associated with a flow to which the received packet belongs. If the retransmission management parameter is not more than a threshold value, the processing determination unit determines to apply the retransmission control to the received packet. If the retransmission management parameter exceeds the threshold value, the processing determination unit stops application of the retransmission control to the received packet.

Packet retransmission control device, packet retransmission control method, and packet retransmission control program

A network system has: a communication device configured to perform frame transmission and reception; a network configured to transfer the frame; a gateway connected between the communication device and the network; and a controller configured to perform management of the communication device and the network. The frame is classified into a control frame for communicating control information necessary for communication and a data frame for communicating data between communication devices. The gateway determines whether a frame received from a source communication device is the control frame or the data frame, forwards the control frame to the controller, and forwards the data frame to the network. The controller performs the management based on the control frame received from the gateway. The network transfers the data frame received from the gateway to a destination communication device without through the controller.

Network system and frame communication method

A network system has: a node performing transmission/reception of a frame based on FCoE; a network; a controller performing management of the node and the network; and a gateway provided with respect to the node. The frame is classified into a control frame and a data frame. The gateway determines whether a frame received from the node is the control frame or the data frame, forwards the control frame to the controller, and forwards the data frame to the network. The controller performs the management based on the control frame received from the gateway. The network transfers the data frame received from the gateway to a destination node without through the controller. The node has a retransmission control and reordering unit configured to perform retransmission control and reordering processing with respect to the data frame.

The present invention provides a packet retransmission control technique in which the communication performance can be improved in a state that the load of a network is high. The packet retransmission control apparatus includes a priority determining section configured to set a packet kind to each of transmission packets to indicate a kind of the transmission packet, and determine a priority level based on the packet kind to indicate an transmission order of the transmission packets; a packet buffer comprising a plurality of queues respectively assigned with priority levels, and configure to store the transmission packet in one of the plurality of queues which is determined based on the priority level of the transmission packet; and an arbitrating section configured to output the transmission packets from one assigned with the highest priority level of the plurality of queues to a lower layer in order of higher priority level.

Packet retransmission control apparatus and packet retransmission controlling method

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

In a network protocol processing system in which variables of each of TCP transmission processing and TCP reception processing depend on each other, asynchronous parallel processing is realized between a transmission processing block and a reception processing block for updated protocol processing. Specifically, the system includes a high priority queue for transferring control data to be processed with high priority, a low priority queue for control data other than the above control data, and priority control means for distributing the control data to two kinds of queues. When a request for session establishment and the session disconnection of a new TCP session is issued from an application during transmission of TCP data, data related with the session establishment and the session disconnection is notified preferentially through the high priority queue, and other control data is transferred through the low priority queue.

Network protocol processing system and network protocol processing method

A packet retransmission control system has: a network control block configured to perform packet retransmission control in an upper layer; and a packet retransmission control block configured to perform packet retransmission control with a shorter retransmission timeout than the upper layer in a lower layer that is lower than the upper layer. If the network control block receives a duplicate acknowledge packet being an acknowledge packet notifying a same sequence number for a predetermined number of times, the network control block performs packet retransmission. The packet retransmission control block determines whether or not retransmission of a same packet is performed earlier in the upper layer than in the lower layer. If retransmission of the same packet is performed earlier in the upper layer than in the lower layer, the packet retransmission control block prohibits retransmission of the same packet in the lower layer.

Packet retransmission control system, method and program

A packet sorting device includes: a buffer for storing packets belonging to a plurality of communication flows; and a control section which determines, when receiving one of a series of packets, whether the one of the received packets is a disorder packet by a determination process, and sorts the received packets in a correct order by storing the disorder packet and communication flow information thereof in the buffer so that the disorder packet and communication flow identification information are correlated. The disorder packet is one of the received packets which is received in an order different from a transmission order of the packets. The communication flow information identifies the plurality of communication flows.

Packet sorting device, receiving device and packet sorting method

Provided is a pattern matching device comprising memories. On each of the combinations of the values of an N number (N: a natural number) of pattern detection signals outputted from a circuited NFA (Non-deterministic Finite Automaton), the memories store both identifiers indicating patterns corresponding to effective patterns of the N number of pattern detection signals and flags indicating the definitions of the combinations, individually in addresses set according to the combinations. Further comprised are an address creating unit for determining the address of the memory corresponding to the combination of the values of the pattern detection signals, by using the combination of the values of the pattern detection signals outputted from the circuited NFA, and a read control unit for reading the identifiers and the flags stored in the address from the memories while incrementing the addresses determined by the address creating unit, until the flags take a specific value.

Pattern matching device and method using non-deterministic finite automaton

Disclosed is a system in which Aan NFA conversion meansunit, receives the number of simultaneous/parallel processing characters from an input deviceand, using a one-character transition finite automaton description matrix stored in an NFA description matrix storage unitand a description matrix which is stored in an NFA conversion result matrix storage unitas an intermediate conversion result, converts the finite automaton to a finite automaton whose transition condition is described in the number of characters subjected to simultaneous/parallel processing. The NFA conversion meanssequentially stores the intermediate result in the NFA conversion result matrix storage unit. When the conversion is completed, a result output meansunitreads the resulting NFA description matrix from the NFA conversion result matrix storage unitand outputs it to an output device

Growing community of inventors

Tokyo, Japan

Kiyohisa Ichino