公开(公告)号：JPH0352434A

公开(公告)日：1991-03-06

申请号：JP18803589

申请日：1989-07-20

Applicant: FUJITSU LTD

Inventor： MATSUDA MASAHIRO

IPC: H04L12/70 ,  H04L12/727 ,  H04L12/751

Abstract: PURPOSE:To stabilize a network by employing such constitution that a minimum delay table and a routing table are dynamically updated when the generated content of the minimum delay table shows a difference larger than a prescribed threshold value from a preceding content. CONSTITUTION:A network delay table 7 is generated based on the minimum delay table informed from a neighboring node, and when the minimum delay table 8 which takes out the minimum delay quantity out of the delay quantities of plural routes of the network delay table 7 and the routing table 9 which takes out the route to supply the minimum delay quantity stored in the minimum delay table 8 are updated, the delay quantity and the route of the routing table 9 are updated when each delay quantity of the minimum delay table 8 is provided with the difference larger than the prescribed threshold value from previous each delay quantity. In other words, the minimum delay table 8 and the routing table 9 can be dynamically updated. In such a manner, the network can be stabilized without changing the route in spite of fluctuation in traffic to some degree.

公开(公告)号：JPH0241095A

公开(公告)日：1990-02-09

申请号：JP19054288

申请日：1988-08-01

Applicant: FUJITSU LTD

Inventor： MATSUDA MASAHIRO ,  TAKEYAMA AKIRA

IPC: G06F7/22 ,  G06F12/00 ,  H04L12/02 ,  H04Q11/04

Abstract: PURPOSE:To quicken data retrieval by selecting the content of a counter representing the bit location of an input text when an expected value read out of a table is zero as the head location so as decide the presence of data of n-bit (0 or 1) consecution in the input text. CONSTITUTION:The system consists of a counter 11 representing the bit location of input position, a memory 12 segmenting and reading the content of the counter 11 for each n-bit from the input text as the head location, a table 13 reading an expected value S of 0 or 1 consecution based on the n-bit read from the memory 12 and an adder circuit 14 adding the expected value S to the content of the counter 11. When the expected value S read from the table 13 is zero, the content of the counter 11 is used as the head position and it is decided that the data of n-bit of consecutive 0s or 1s exists in the input text by taking the content of the counter 11 as the head location. Thus, the high speed of (n-1) times in comparison with a conventional method applying 1 bit processing.

公开(公告)号：JPS63136855A

公开(公告)日：1988-06-09

申请号：JP28374186

申请日：1986-11-28

Applicant: FUJITSU LTD

Inventor： KANOUCHI JUNICHI ,  NOJIMA SATOSHI ,  SAKAKAWA KAZUO ,  AWAZU TOMOHIKO ,  MATSUDA MASAHIRO

IPC: H04L13/08

Abstract: PURPOSE:To attain a high speed processing with an extremely simple constitution and with low cost by detecting the leading end of frame data through the use of a FIFO (First-In.First-Out) memory, and detaching a frame generation circuit which is used at the time of starting. CONSTITUTION:If a reception circuit 1 receives a packet, it outputs a signal informing a write control part 3 of the reception. In answer to this, the write control part 3 generates to the FIFO memory 2 a control signal for writing the received packet of the reception circuit 1 into the FIFO 2 and it executes writing. If the FIFO memory 2 is full, a read/transmission control part 5 reads the packet from the FIFO memory 2 and temporarily stores it in a transmission circuit 4. The read/transmission control part 5 checks whether data in the transmission circuit 4 is the leading end of the frame or not. If it is, said part changes over a transmission selection switch 6 from the side of a frame generation circuit 61 to the side of the transmission circuit 4.

公开(公告)号：JPS6354041A

公开(公告)日：1988-03-08

申请号：JP19845286

申请日：1986-08-25

Applicant: FUJITSU LTD

Inventor： MATSUDA MASAHIRO ,  FUKUDA HARUKI ,  TAZAKI TAKASHI ,  AWAZU TOMOHIKO ,  HIGUCHI MASAHIRO

Abstract: PURPOSE:To facilitate the network management by allowing a communication equipment to insert a data from a terminal equipment when a circulated time slot exclusive use for the terminal equipment of the carrier detection multiplex access collision system is not in use and allowing the control equipment to branch the data and send it to a terminal equipment when in use, thereby eliminating for the need of decoding an address. CONSTITUTION:When a circulated slot is not in use and a control circuit 23' detects a transmission flag of the carrier detection multiple access collision detection (CSMA/CD) system and a transmission request from a transmission FiFo, a control circuit 10 inserts a data stored in the transmission FiFo to a slot by a data insertion circuit and sends the flag while it is changed in the busy flag from that no in use. A slot state control circuit changes the flag from the transmission use into the reception use and sends the result to a transmission line. When the control circuit 10 detects it that the slot circulated with the presence of a data from a terminal equipment of the CSMA/CD system is in use, the circuit 10 sends the data to a reception FiFo via a data branch circuit.

公开(公告)号：JPS6282746A

公开(公告)日：1987-04-16

申请号：JP22199885

申请日：1985-10-07

Applicant: FUJITSU LTD

Inventor： TAZAKI TAKASHI ,  FUKUDA HARUKI ,  MATSUDA MASAHIRO ,  KURITSU TOMOHIKO

Abstract: PURPOSE:To attain an efficient packet transmission even to a synchronous consecutive communication data using one packet per plural frames by providing a reservation flag and a band counter area to the control section of a packet header of a packet. CONSTITUTION:In case of the synchronizing continuous communication, packet exchanges 2-1-2-n set the reservation flag of a packet, band counter set sections 7-1-7-n set initially a count corresponding to a required band to a band counter area to send a reservation packet. A supervisory controller 1 supervises the packet of a ring transmission line 8 and a band counter control section 6 applies the count control of addition or subtraction of the band counter area. When the count of the band counter area reaches the specified value of '0' or the like, the packet exchange uses a reservation packet to send the synchronizing continuous communication data. Thus, the synchronizing continuous communication of one packet per 2-frame is applied and even when the reservation flag is set, the packet where the count of the band counter area is not a specified value is used for the burst communication.

公开(公告)号：JPS6261445A

公开(公告)日：1987-03-18

申请号：JP20108385

申请日：1985-09-11

Applicant: FUJITSU LTD

Inventor： TAZAKI TAKASHI ,  FUKUDA HARUKI ,  MATSUDA MASAHIRO ,  AWAZU TOMOHIKO

Abstract: PURPOSE:To start the transmission of a packet even when the state of a reception side communication control equipment is unknown for a communication control equipment being a sender by providing an attribute information addition means, a sender address storage means and a reception condition comparison means. CONSTITUTION:The communication control equipment being the sender having the attribute information addition means 101, the sender storage means 102 and the reception condition comparison means 103 sends the information representing that to which among the head, middle and last part of the transmission data the transmission packet corresponds while being added to the packet, and the communication control equipment being the reception side stores the sender address of the packet when the head packet is received until the reception of the last packet and receives the arrival packet only when the sender address of the arrived packet and the sender address stored are coincident. Thus, the sender starts the transmission of data independently of the state of the incoming destination and when no transmission right is given by the packet arrival order priority control at the reception side, the transmission is stopped.

公开(公告)号：JPS61144944A

公开(公告)日：1986-07-02

申请号：JP26792684

申请日：1984-12-19

Applicant: FUJITSU LTD

Inventor： MATSUDA MASAHIRO ,  YATSUHOSHI AKIMASA

Abstract: PURPOSE:To select a channel in response to communication object and to improve the operating efficiency by providing a means storing an identification number of a channel usable for each transmission destination of transmission information to a communication controller connected in a loop and using the means to decide the selecting range of the operating communication line. CONSTITUTION:A communication controller 2 is provided with a slot number storage circuit 16 storing an identification number of a usable communication line at each transmission destination of transmission information and a usable slot number (n) is stored corresponding to an incoming address DA of a transmission packet P. The number (n) is transmitted to a comparator circuit 14, which transmits a switching signal to a gate 9 when the incoming slot number and the number (n) are coincident. Since a usable slot S is designated by the storage circuit 16 depending on the added incoming address DA, the idle slot S is selected among lots of slots S in the packet P addressed to a terminal device calling for real time performance and the idle slot S is selected among a few slots S in the packet P addressed to the other device.

公开(公告)号：JPS61134141A

公开(公告)日：1986-06-21

申请号：JP25627284

申请日：1984-12-04

Applicant: Fujitsu Ltd

Inventor： MATSUDA MASAHIRO ,  FUKUDA HARUKI ,  TAZAKI TAKASHI ,  AWAZU TOMOHIKO

Abstract: PURPOSE: To prevent influences given on actual communication when a node in which power source disconnection is generated cuts off a connected subloop by providing a junction box in a transmission line, setting the subloop to off- state and keeping the transmission line ring state when power source disconnection takes place in a node connected to the subloop.
CONSTITUTION: When power source disconnection occurred in a node 5, a monitor node 1 interprets this by a signal from the node and sends out a disconnection command and address to a junction box 2 to cut off a subloop to which the node is connected. At this time, each node acts not to write data in the frame when the node interprets the disconnection command. Accordingly, the junction box 2 to which the node 5 in which power source disconnection is generated interprets the address and executes the disconnection command, and cuts off a subloop 11 to which the node 5 that caused troubles while maintaining a double loop of the transmission line by constituting a by-pass circuit as shown by a dotted line in the figure.
COPYRIGHT: (C)1986,JPO&Japio

Abstract translation: 目的：为了防止在发生电源断开的节点时对实际通信造成的影响，通过在传输线路中提供接线盒来切断连接的子环，将电源设置为关闭状态，并在发电时保持传输线环状态 源断开发生在连接到子环路的节点中。 构成：当在节点5中发生电源断开时，监视节点1通过来自该节点的信号来解释这一点，并将断开命令和地址发送到接线盒2以切断节点所连接的子环路。 此时，当节点解释断开连接命令时，每个节点都不会在帧中写入数据。 因此，产生电源断​​开的节点5的接线盒2解释地址并执行断开指令，并且在保持传输线的双回路的同时切断引起故障的节点5的子环路11 通过构成如图中虚线所示的旁路电路。

公开(公告)号：JPS6018040A

公开(公告)日：1985-01-30

申请号：JP12481583

申请日：1983-07-11

Applicant: FUJITSU LTD

Inventor： AZUMA MITSUHIRO ,  TAKEYAMA AKIRA ,  MATSUDA MASAHIRO ,  TAZAKI TAKASHI

IPC: H04L29/14 ,  H04L12/42 ,  H04L11/00 ,  H04L13/00

Abstract: PURPOSE:To attain the assured transmission of data by performing communication while confirming mutually the states of a communication controller and a terminal serving as the remote side of communication. CONSTITUTION:A decentralized control loop network contains communication controllers 2 and 3 having terminals and a communication circuit which connects controllers 2 and 3 to each other. When a transmission request is given from a terminal, a carry detection bit CD of a transmission data style 15A is set at 1. A state confirming device 11B sets a display bit A of the transmission side in a ready mode. While a display bit B of the reception side is set at 0, and the data SD is transmitted. At the reception side the bits A and CD contained in a reception data style 16B are checked. Then a ready state is informed to a terminal of the reception side via a confirmation mechanism 13B. At the same time, the reception data is converted by a P/S converter 14B and sent to a terminal.

公开(公告)号：JP2005218129A

公开(公告)日：2005-08-11

申请号：JP2005061855

申请日：2005-03-07

Applicant: Fujitsu Ltd ,  富士通株式会社

Inventor： MATSUDA MASAHIRO

IPC: H04M11/00

Abstract: PROBLEM TO BE SOLVED: To solve the problem that it is difficult to switch a case where a user wants to call a specific voice communication terminal and a case where the user wants to call a plurality of voice communication terminal because a telephone number representative of a plurality of terminals is assigned or the same telephone number is assigned to the plurality of terminals while requiring the telephone number to be registered beforehand in an exchange in order to communicate to the plurality of voice communication terminals in the conventional circuit switched network. SOLUTION: A broadcast means of the packet switching network is used to facilitate switching of calling processing only to a specific voice communication terminal and calling processing to a plurality of voice communication terminals including the specific voice communication terminal. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题为了解决难以切换用户想要呼叫特定语音通信终端的情况以及用户想要呼叫多个语音通信终端的情况的问题，因为电话号码 分配多个终端的代表或者相同的电话号码被分配给多个终端，同时要求在交换中预先登记电话号码，以便在传统的电路交换网络中与多个语音通信终端进行通信。 解决方案：分组交换网络的广播方式用于仅促使呼叫处理仅切换到特定语音通信终端，并且对多个包括特定语音通信终端的语音通信终端进行呼叫处理。 版权所有（C）2005，JPO＆NCIPI