Fujitsu Corporation

Motoshi Hamasaki

Mitsumasa Matsuike

Satoshi Miyazaki

Kazuhiro Watanabe

Nobuhiro Rikitake

Takahisa Yoshizumi

Masahiro Yoshimoto

Hiroshi Murakawa

Kazuhiro Ohnuma

Koji Tanonaka

Masanobu Edasawa

Yasuo Iwahashi

Hisayoshi Kuraya

Nobumitsu Ishiwatari

Naoto Kidoku

Motonori Inui

A radio wave management method executed by a processor included in a radio wave management apparatus, the radio wave management method includes counting the number of first mobile terminals which exist in a first area corresponding to a measurement target of a radio wave situation; requesting second mobile terminals, which exist in a second area that is different from the first area, to move to the first area when the number of first mobile terminals is smaller than the predetermined number; requesting the first mobile terminals and the second mobile terminals to measure the radio wave situation when the second mobile terminals move to the first area; receiving the radio wave situation from the first mobile terminals and the second mobile terminals; and transmitting the received radio wave situation to a computer in response to a request from the computer which is coupled to the radio wave management apparatus.

Radio wave management method, radio wave management apparatus, and recording medium

A switching apparatus having a plurality of ports, includes: switch information storage to store an output port identifier for a combination of an input port identifier, an input virtual path identifier, and a destination address; a detector to detect a first input virtual path identifier and a first destination address assigned to an input packet; a searcher to search the switch information storage for a first output port identifier based on a first input port identifier that identifies a port to which the input packet has been input, the first input virtual path identifier, and the first destination address; and a packet switch to transfer the input packet to a port identified by the first output port identifier.

Switching apparatus and method for setting up virtual LAN

There is provided a slide rail which includes a first rail member, a second rail member provided slidably with respect to the first rail member, the second rail member including a hole portion opening at least on a surface of the second rail member on the side of the first rail member, a lock lever and a rotating shaft provided on the surface of second rail member on the side of the first rail member, the lock lever being provided to be able to rotate about the rotating shaft, the lock lever including a tongue portion, the tongue portion being formed so as to be inserted in the hole portion, and a receiving portion provided on the second rail member and configured to hold the tongue portion of the lock lever from the direction of the first rail member.

Slide rail

There is provided a node device having a plurality of transmission lines, included in a network, the node device including a first clock extracting section configured to extract a clock from a first packet used for synchronization of a clock in the node device, the first packet being received from the network through the transmission line, a second clock extracting section configured to extract a clock from a signal received from the network through the transmission line, and a clock selector to select a clock out of the clock extracted by the first clock extracting section and the clock extracted by the second clock extracting section, wherein the clock selected by the clock selector is used for synchronization of a clock in the node device.

Node device

A frame transmitting apparatus that transmits a frame via a synchronous digital hierarch network or a synchronous optical network, includes a data-amount detecting unit that detects an amount of data received from other apparatus; and a frame transmitting unit that transmits, when the amount of data detected by the data-amount detecting unit exceeds a predetermined threshold value, a frame in which information pertaining to a frame control is stored in a fixed stuff of a virtual container frame or a synchronous-transport-signal frame.

Frame transmitting apparatus and frame receiving apparatus

A network equipment (element) is provided with at least one SDH unit, connected to an SDH link or SONET link, extracting and outputting a first line clock synchronized with a received signal; at least one Ethernet unit, connected to an Ethernet link, extracting a second line clock synchronized with a received signal and converting the second line clock into a clock of a frequency of the first line clock to be outputted; and a timing processor receiving the clocks of the frequency of the first line clock from the SDH unit and the Ethernet unit, selecting among the clocks a clock of the best quality and outputting an equipment clock synchronized with the clock selected.

Network equipment

A transmission apparatus utilizing an SDH is provided. The transmission apparatus includes a processing unit controlling the transmission apparatus, an SSM extraction unit extracting a first SSM from an input signal, and a selector selecting either of the first SSM and a second SSM set by the processing unit. The transmission apparatus can add an incoming SSM function, for instance, to an external 2 Mbps SSM function in addition to an assumed SSM function. Accordingly, the transmission apparatus can conform to the ITU-T G.781 Recommendation by utilizing a related-art synchronization function.

Transmission apparatus

There is provided a communication system () such as an ATM-PON including a station-side unit () having a point-to-multipoint message generating unit (A) and a group designation message generating unit (B) and subscriber-side units (-to-N: N is a natural number) each having a point-to-multipoint message processing unit (A) and a state control unit (B). The station-side unit () sends a group designating message to some of the subscriber-side units (-=1 to N), thereby to designate some of the plurality of the subscriber-side units as a component constituting a group of units which are to receive a point-to-multipoint message, and only the subscriber-side units (-) controls to bring the reception and the processing on the point-to-multipoint message to a valid status. With this arrangement, only specified components constituting a group of units can be made to receive the point-to-multipoint message. Thus, it becomes possible to avoid unexpected erroneous operation which can be caused if information specific to a vendor of some of the subscriber-side units (-) is sent to all of the subscriber-side units. Moreover, it becomes possible to provide information to the specified components constituting a group of units within a very short period of time.

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Kawasaki, Japan

Motoshi Hamasaki