Sumitomo Electric Industries, Limited

Panasonic Intellectual Property Management Co., Ltd.

Toru Inoue

Kazuhisa Yamashita

Tomohiro Fujita

Yuji Yasuoka

Chikara Nara

Makoto Itou

Takeyuki Fujii

Shingo Shiba

A magnetic core includes a winding core and first and second flanges connected to the winding core. First and second terminal electrodes are connected to a lead frame. The first flange is bonded to the first and second terminal electrodes. Third and fourth terminal electrodes are bonded to the second flange. First and second insulation-coated conductive wires are wound about the winding core. The first and second insulation-coated conductive wires are connected to the first and second terminal electrodes and the third and fourth terminal electrodes. The lead frame is bent so as to rotate the magnetic core by 90 degrees with respect to the lead frame. A magnetic plate is bonded to the magnetic core. The magnetic core is removed from the lead frame by removing the first and second terminal electrodes from the lead frame, thereby providing a common-mode choke coil. The common-mode choke coil having stable electrical performance is produced efficiently by the above method.

Method for manufacturing common-mode choke coil

A relay device includes a relay processing unit that relays a downstream frame received by a first transceiver to a second transceiver, and relays an upstream frame received by the second transceiver to the first transceiver; and a control unit that follows upstream multiple access control performed by a station side device in a first line, for transmission of the upstream frame to be transmitted by the first transceiver to the station side device, and independently performs upstream multiple access control for reception of the upstream frame received by the second transceiver from a home side device in a second line. The control unit reports an amount of data that the home side device in the second line will be allowed to transmit, to the station side device in the first line before the data arrives at the second transceiver.

Relay device, station side device, and communication system and communication method using relay device

There is provided a technique that enables a process to be performed smoothly between two processing units of an OLT after rebooting of one of the processing units even in the case where a process by the processing unit is temporarily halted. An upper processing unit can be temporarily halted when updating firmware. A basic communication unit (lower processing unit) is configured to maintain its operation even when the upper processing unit is temporarily halted. When an event occurs during a halt period of the upper processing unit, a matching unit matches a management state stored in a first storage unit with a management state stored in a second storage unit after the halt period of the upper processing unit.

Subscriber line terminal, control method, and control method for PON system

A dynamic bandwidth allocation apparatusof the present invention is mounted on, for example, an optical line terminalin a PON system that relays upstream frames Fand Freceived from optical network units, to upper networks. The dynamic bandwidth allocation apparatuscalculates, based on the reception rates of the upstream frames Fand Ffrom the optical network units, the sending rates of relay destinations of the upstream frames Fand F, and changes in the amounts of data occurring upon relaying the upstream frames Fand F, allocated bandwidth upper limits (max_bw) at which even when the amounts of data increase, the upstream frames Fand Fcan be relayed; and dynamically allocates amounts of upstream transmission for the respective optical network unitsin the range of the calculated allocated bandwidth upper limits (max_bw).

Growing community of inventors

Osaka, Japan

Toru Inoue