Fujitsu Corporation

Canon Kabushiki Kaisha

Masayuki Ono

Yasuyuki Mitsumori

Kanta Yamamoto

Kazuhiro Shibuya

Tetsuya Hanawa

Yoshihiro Matsumoto

Masanori Kondo

Toshihide Tsuzuki

Akinori Miyata

Tatsuya Kawasumi

Yutaka Takashima

Shogo Sawamura

Yuji Kuga

An apparatus includes a first port coupled to a first apparatus through a ring line, a second port coupled to a second apparatus through a second line, the second apparatus disposed external to the ring line, the second line configured redundantly with a first line between the first apparatus and the second apparatus, a third port coupled to the first apparatus through a control line for a control signal concerning the first line, and circuitry that detects a fault in the control line, wherein the circuitry detects a fault in the second line, switches the second line from an active line to a standby line in accordance with the detection of the fault in the second line, and while the fault in the control line is detected, shuts down the first port in accordance with the detection of the fault in the second line.

Communication apparatus, communication system, and communication control method

A device includes a first port in which a first address as a monitoring point is set and which is connected to one communication line belonging to a link aggregation group to which another communication line for another device also belongs, and a processor configured to transmit and receive a monitoring frame based on the first address through the first port, switch an operating state of the first port to an active state or a standby state, and restrict the transmission and the reception of the monitoring frame through the first port when the operating state of the first port is switched to the standby state, wherein the first address is identical to a second address which is set as a monitoring point in a second port of the other device connected to the other communication line belonging to the link aggregation group to which the one communication line belongs.

Communication device, communication method and communication system

A transmitter used in a transmission system in which a first network is connected, via a second network, to a third network, the transmitter being arranged between the first network and the second network, the transmitter includes: a generator configured to specify an identifier of data area in which communication data affected by a failure occurred in the first network are stored, in a frame transmitted from the second network, and to generate failure information associated with the identifier specified; and a transmitter configured to transmit the failure information generated by the generator, via the second network, to another transmitter arranged between the second network and the third network.

Transmitter and transmission system

A transmission device includes: a signal receiving part configured to receive a time division multiplexing signal in which a plurality of packets are stored; a separating part configured to separate the plurality of packets from the time division multiplexing signal; an assigning part configured to assign an identifier corresponding to a stored position in the time division multiplexing signal to each of the plurality of packets; and a packet transmitting part configured to transmit at least two packets having different identifiers out of the plurality of packets through a common transmission path.

Transmission device and transmission system for transmitting and receiving time division multiplexing signal in optical transport network

A shape-measuring method accurately performs fitting between measured data of a surface to be measured, which is formed based on a design shape having multiple periodical design-level differences, and a design shape. A level-difference region and a level-difference height are specified from a measured point sequence of the surface to be measured. A point sequence is moved by a level-difference height. In other words, a process for eliminating the level difference is performed, and fitting target data without a level difference is obtained. On the other hand, a reference shape without multiple design-level differences is obtained from the design shape. Fitting between the fitting target data and the reference shape is performed by the least square method or the like.

Shape measuring method

A portable radio communication device has an antenna which can be extended for use and retracted for storage, and can transmit a signal at the same level of electric energy when the antenna is stored as when the antenna is extended. When the antenna is retracted and stored, the stored condition is detected by a detecting switch. In response to a detected signal from the detecting switch, a transmission output controller produces an increased transmission output control signal to increase the level of electric energy of the signal to be transmitted which is higher than a normal level of electric energy of signals transmitted from the antenna. When the increased transmission output control signal is generated, a power amplifier amplifies a signal to be transmitted which is supplied from a transmission signal generator, and supplies the amplified signal to the antenna. Therefore, even when the antenna is stored, it can radiate the signal at the same level of electric energy as when the antenna is extended. The antenna comprises an antenna which operates as a loaded antenna when it is extended and as a helical antenna when it is stored.

Growing community of inventors

Kawasaki, Japan

Masayuki Ono