Abstract: A communication node relays data between equipment communicating with each other via a multi-hop network based on a multi-hop manner, records a predetermined kind(s) of data among the relayed data, checks validity of the equipment by matching the predetermined kind(s) of data against past data recorded by the recording part, and outputs a check result of the validity of the equipment to a predetermined output destination(s).

Abstract: An electric power storage amount by type calculating apparatus includes: an acquisition unit configured to acquire charging/discharging history information in which a charge/discharge electric power amount of a storage battery of a mobile object and a type of electric power are correlated and electric power storage amount information indicating an amount of electric power stored in the storage battery; and a calculation unit configured to calculate the amount of electric power stored in the storage battery by types of electric power on the basis of the charging/discharging history information and the electric power storage amount information.

Abstract: A communication node relays data between equipment communicating with each other via a multi-hop network based on a multi-hop manner, records a predetermined kind(s) of data among the relayed data, checks validity of the equipment by matching the predetermined kind(s) of data against past data recorded by the recording part, and outputs a check result of the validity of the equipment to a predetermined output destination(s).

Abstract: A control device (100) includes a communication unit (102) which receives power consumption information of a power control target from an electric energy meter, an acquisition unit (104) which acquires demand control information from at least one power supply source, and a control unit (106) which controls operation of the power control target based on the power consumption information and the demand control information.

Abstract: A node is included in a communication control system including a plurality of nodes 31, and a master device 30 for performing flow control of multihop communication in a network including the plurality of nodes 31. To the node 31 in use of second service, a time obtained by subtracting, from a frame period of the network, a total one frame transmission time of each node, used for first service is allocated as one frame transmission time used for second service having a priority set lower than that of the first service.

Abstract: A control device (100) includes a communication unit (102) which receives power consumption information of a power control target from an electric energy meter, an acquisition unit (104) which acquires demand control information from at least one power supply source, and a control unit (106) which controls operation of the power control target based on the power consumption information and the demand control information.

Abstract: A node is included in a communication control system including a plurality of nodes 31, and a master device 30 for performing flow control of multihop communication in a network including the plurality of nodes 31. To the node 31 in use of second service, a time obtained by subtracting, from a frame period of the network, a total one frame transmission time of each node, used for first service is allocated as one frame transmission time used for second service having a priority set lower than that of the first service.

Abstract: An optical communication system includes a first optical communication apparatus configured to insert a wavelength control signal in a main signal to produce a modified main signal; convert the modified main signal into a first optical signal; and transmit the first optical signal, and a second optical communication apparatus configured to receive the first optical signal; extract the wavelength control signal from the received first optical signal; determine a wavelength of a second optical signal based on the extracted wavelength control signal; and transmit the second optical signal to the first optical communication apparatus.

Abstract: An optical communication system includes a first optical communication apparatus configured to insert a wavelength control signal in a main signal to produce a modified main signal; convert the modified main signal into a first optical signal; and transmit the first optical signal, and a second optical communication apparatus configured to receive the first optical signal; extract the wavelength control signal from the received first optical signal; determine a wavelength of a second optical signal based on the extracted wavelength control signal; and transmit the second optical signal to the first optical communication apparatus.

Abstract: While continuously providing a service in an existing optical communication system, a service at another communication speed is realized at low cost. For this reason, a station-side optical network terminal apparatus is configured so that to one light-emitting unit connected are a first processing unit that performs a process to output an optical signal at one communication speed by the light-emitting unit and a second processing unit that performs a process to output an optical signal at another communication speed by the light-emitting unit.

Abstract: The present invention provides a communication control system that monitors a status of a transmission line, and can dynamically change a communication band used by a communication device included in an access line based on the monitored result. Line terminal devices (200-1 to 200-n) monitor a status of transmission lines (1, 2) connected to the line terminal devices (200-1 to 200-n), and control a communication band used for performing data communication in accordance with the status of the transmission lines (1, 2). A line aggregation device (300) monitors a status of transmission lines (2, 3), and controls a communication band used for performing data communication in accordance with the status of the transmission lines (2, 3).

Abstract: An optical communication system includes a first optical communication apparatus configured to insert a wavelength control signal in a main signal to produce a modified main signal; convert the modified main signal into a first optical signal; and transmit the first optical signal, and a second optical communication apparatus configured to receive the first optical signal; extract the wavelength control signal from the received first optical signal; determine a wavelength of a second optical signal based on the extracted wavelength control signal; and transmit the second optical signal to the first optical communication apparatus.

Abstract: While continuously providing a service in an existing optical communication system, a service at another communication speed is realized at low cost. For this reason, a station-side optical network terminal apparatus is configured so that to one light-emitting unit connected are a first processing unit that performs a process to output an optical signal at one communication speed by the light-emitting unit and a second processing unit that performs a process to output an optical signal at another communication speed by the light-emitting unit.

Abstract: The present invention provide an optical network termination apparatus and method which connects a user network to an optical access network for monitor control from a user network and performs a part of functions of a user terminal such as a personal computer connected to a user network, thereby monitor control on the apparatus from the user network can be realized. The apparatus has a connection unit for connection with the user network. An address of the user network is set in the connection unit, and information from the user network is inputted, and transmitted to the user network, in accordance with the address.

Abstract: An optical line termination (OLT) comprises a dynamic cell allocation section, a control section, a message transmitter-receiver section and a cell allocation section. The dynamic cell allocation section sets upstream bands based on existence of an alarm and a type thereof transmitted by each optical network termination(ONT). The alarm from each ONT is detected, and a detection result detected this time, a detection result detected for the last time and the number of empty cells in the cell allocation cycle are referred to. Thus, a new band is set for each ONT. The dynamic cell allocation section computes a cell allocation for a frame with respect to three types of upstream bands for each ONT. When the band is changed, cell allocation positions corresponding to all ONTs are computed.

Abstract: An ATM dual system wherein the intervals between couplers and ONUs are dualized comprises a dualized line termination device loading a PLOAM cell transmitter/receiver within an OLT, the PLOAM cells being used for monitoring and being transmitted and received between the OLT and the ONU, and a PST message transmitter/receiver which loads and allocates switch controlling information to K1/K2 byte areas of the aforementioned PLOAM cells, and a VP/VC switch which switches each of the relevant VP or VC on the basis of the aforementioned K1/K2 byte information.