Fujitsu Corporation

Kenji Maeda

Yuji Higashihara

Akihiro Horiuchi

Hirofumi Mitome

Shunichi Shibata

Kenji Yamada

Hiroshi Yamamoto

Taiji Kondo

Tatsuya Soneda

Katsuhiko Yamatsu

Satoshi Esaka

Koki Mie

Yoshinobu Shimokawa

Hiromitsu Kajiyama

Mitsuharu Amano

Yoshiyuki Jufuku

Kazuhisa Matsumoto

Tsuyoshi Takehiro

Fumikiyo Kikukawa

Syouichi Urata

Ryoji Matsuno

Toshiharu Eto

Mitsuhiro Noyama

Kiyoshi Nakagawa

Kenji c/o Fujitsu Limited Yamada

A node device includes: a communication unit to transmit a data frame containing frequency information and receive the data frame; a storage unit to store a table in which frame identification information and the frequency information are associated; and a control unit to: determine whether a destination of the received data frame is its own node device; determine whether the frame identification information of the received data frame is registered in the table; determine whether the number of transmission times is less than or equal to the number of transmission times corresponding to the frame identification information registered in the table; update the frequency information corresponding to the frame identification information registered in the table with the frequency information of the received data frame; and increase the number of transmission times, wherein the communication unit transmits the data frame for which the number of transmission times is increased.

Node device and data relaying method

A network relay node device for relaying communication between a first network and a second network having a protocol different from a protocol of the first network through a switch, the network relay node device includes an identical segment information generation control unit that generates identical segment information for identification of another relay node device belonging to a same segment as a local device in the second network and a loop suppression control unit that suppresses a loop of a communication including the switch by broadcasting a received broadcast frame only to a connection port of the first network if the identical segment information is detected in identification source node information acquired from a header of the broadcast frame when the broadcast frame is received from a connection port of the first network.

Network relay node device, network relay method, and recording medium

A node apparatus includes a receiving unit receiving a data frame from one of adjacent nodes apparatuses; a storing unit storing an identification information management table in which frame identification information with which the data frame may be uniquely identified, and overlapped data identification information; a processor which performs a process including: judging whether or not a final destination of the received data frame is the node apparatus itself; judging whether or not a registration that matches the frame identification information of the received data frame exists in the identification information management table; judging whether or not the overlapped data identification information of the received data frame and the overlapped data identification information corresponding to the registration match; and discarding the received data frame; and performing a retransmission of the received data frame to another adjacent node that has not been a transmission destination of the data frame.

Node apparatus, data relay method and computer-readable recording medium

In a system including a plurality of node devices that form an ad hoc network (), a node device (N) receives, from another node device (N; N), first frame data including identification information of a source node device and a destination node device. If node related information of only the node device can be additionally stored in the received first frame data, the node device generates second frame data including the identification information of the source node device (N; N) or the destination node device (N; N) as destination identification information, node related information within the first frame data, and the node related information of the node device, also generates third frame data that does not include the node related information within the first frame data, and transfers the generated second and third frame data to another node device (N, N; N).

Node related information collecting system, node device and frame processing method

A method of connecting a line concentrator to other line concentrators in a switching system, wherein a switching unit accommodates the line concentrator is provided. The method includes the steps of analyzing a call received by the switching unit through the line concentrator, and connecting lines that are accommodated by the line concentrator and are connected to the other line concentrators without connecting through the switching unit when the call is detected to be made between the line concentrator and the other line concentrators. Thus, a call can be made to a specific dial number without connecting through the switching unit provided in the switching system. Additionally, a call can also be made by use of another switching unit when a communication path between the switching unit and the line concentrator is overcrowded.

Method and apparatus for connecting lines in line concentrator of switching system

A method of controlling affiliation of a remote line-collection device with a plurality of switches connected via a network includes the steps of providing each switch with a backup-storage area in advance in addition to a normal storage area, and transferring control data of the remote line-collection device from the normal storage area of a first switch to the backup-storage area of a second switch when affiliation of the remote line-collection device is changed from the first switch to the second switch.

Method and device for controlling affiliation of remote line-collection device with switch

Growing community of inventors

Kasuga, Japan

Kenji Maeda