公开(公告)号：JPH0145782B2

公开(公告)日：1989-10-04

申请号：JP23262882

申请日：1982-12-25

Applicant: FUJITSU LTD

Inventor： TAKEYAMA AKIRA ,  TAZAKI TAKASHI ,  NOJIMA SATOSHI ,  MITA TERUYOSHI

IPC: H04B10/035 ,  H04B10/07 ,  H04B10/079 ,  H04B10/275 ,  H04B10/29 ,  H04B17/40 ,  H04L25/02

公开(公告)号：JPS6232559A

公开(公告)日：1987-02-12

申请号：JP17210385

申请日：1985-08-05

Applicant: FUJITSU LTD

Inventor： MITA TERUYOSHI

IPC: G06F13/374 ,  G06F13/26

Abstract: PURPOSE:To detect a double selection due to some reason by making a signal line to be a processing-request signal line together with a selection line and by inspecting the sigularity of a signal on the signal line. CONSTITUTION:The signal lines 25, 35, 45, and 55 are the lines for the processing-request signals which are the outputs from a priority-selection circuit transmitted by respective adaptors 2, 3, 4 and 5, and they output logical '0' when a request is made. These processing-request signal lines 25, 35, 45 and 55 are connected to a NAND gate 10 and an exclusive logical sum gate 11 comprised in a common part 1, and also connected to the AND gates 34, 44 and 55 of respective adaptors 3, 4 and 5 as shown in the figure. As a result, when there is a processing-request cause LRQ or HRQ and there is not a more significant processing-request, a logical '0' is outputted, and therefore, the only processing-request is selected by each adaptor of priority selection signal and is transmitted.

公开(公告)号：JPS6126693B2

公开(公告)日：1986-06-21

申请号：JP2379681

申请日：1981-02-20

Applicant: Fujitsu Ltd

Inventor： HOSHI FUMIO ,  MITA TERUYOSHI ,  SATO MASAO

IPC: G06F9/38

CPC classification number: G06F9/3802 ,  G06F9/3889

公开(公告)号：JPS6170832A

公开(公告)日：1986-04-11

申请号：JP19301984

申请日：1984-09-14

Applicant: Fujitsu Ltd

Inventor： MITA TERUYOSHI

Abstract: PURPOSE: To apply frequency synchronism between communication networks without using a special line by detecting a frequency included in data or a clock flowing to a line connected to the 2nd communication network to change the frequency of a master node.
CONSTITUTION: Data terminal devices 11, 12 of the 1st communication network and data terminal devices 13, 14 of the 2nd communication network are coupled via lines 20, 21. A slave node 31 extracts a clock from a frame signal inputted from a feeder 40 and compares the frequency of the extracted clock and the frequency of a clock line of the line 20. Then the result of comparison is transmitted to a master node 30 inserted to a frame. The master node 30 changes the frequency of a frequency variable oscillator 50 according to received frequency information to synchronize the frequency of the 1st communication network with that of the 2nd communication network.
COPYRIGHT: (C)1986,JPO&Japio

Abstract translation: 目的：通过检测数据中包含的频率或者流向连接到第二通信网络的线路的时钟来改变主节点的频率，来在通信网络之间不使用专线来应用频率同步。 构成：第一通信网络的数据终端设备11,12和第二通信网络的数据终端设备13,14经由线路20,21耦合。从节点31从从馈线40输入的帧信号中提取时钟， 将提取的时钟的频率和线20的时钟线的频率进行比较。然后将比较结果发送到插入到帧的主节点30。 主节点30根据接收的频率信息改变频率可变振荡器50的频率，以使第一通信网络的频率与第二通信网络的频率同步。

公开(公告)号：JPS617661B2

公开(公告)日：1986-03-07

申请号：JP15251881

申请日：1981-09-25

Applicant: Fujitsu Ltd

Inventor： HIGUCHI TAIHO ,  MITA TERUYOSHI

IPC: G06F13/38 ,  G06F13/12

CPC classification number: G06F13/122

公开(公告)号：JPS60253336A

公开(公告)日：1985-12-14

申请号：JP10982884

申请日：1984-05-30

Applicant: FUJITSU LTD

Inventor： NAKAMURA OSAMU ,  MITA TERUYOSHI ,  KITANO YOSHIHIRO ,  NAKAHARA YASUHIRO ,  NEGISHI HITOSHI

IPC: H04B10/572 ,  H04B10/00 ,  H04B10/07 ,  H04B10/275 ,  H04B10/293 ,  H04B10/564

Abstract: PURPOSE:To keep the photodetecting levels of each node within an optimum range respectively and at the same time to change easily the number, arrangement, etc. of nodes, by informing the corresponding photodetecting level to the corresponding node through a monitor node that received the information on the photodetecting levels from each node and controlling the level to be sent by the node. CONSTITUTION:Terminal nodes 2-4 can detect reception levels and also control the transmission levels. In case the level received by a node 3 is outside a prescribed range, the node 3 gives the information on the photodetecting level to a monitor node 1. The node 1 retrieves a node 2 sent to the node 3 through a table, etc. and delivers the information on the corresponding photodetecting level. Thus the node 2 transmits an optical signal according to the informed level. Thus the photodetecting levels received by nodes 2-4 or the node 1 can be kept within a prescribed range.

公开(公告)号：JPS60245339A

公开(公告)日：1985-12-05

申请号：JP10196384

申请日：1984-05-21

Applicant: FUJITSU LTD

Inventor： KITANO YOSHIHIRO ,  MITA TERUYOSHI ,  NAKAHARA YASUHIRO ,  NEGISHI HITOSHI ,  NAKAMURA OSAMU

IPC: H04L12/433

Abstract: PURPOSE:To use a packet of appropriate length, and to improve the use efficiency of a communication line and the service by selecting one of packets from a communication frame containing plural packets having plural data lengths, writing a transmitting data in this packet, and transmitting it. CONSTITUTION:When a transmission request from a subsystem 3 is detected by an interface controlling circuit 37, and informed to a controlling circuit 34, data is received from the subsystem 3 and accumulated in a buffer 39. When the data of length at a data part of the longest packet is accumulated in the buffer 39, or the transmitting data is ended, the control part 34 inspects each packet of a communication frame received successively in the buffer 35, and searches a packet in which a busy display bit is an idle display, and the length of a data part determined by a data length part 25 is not shorter than the transmitting data of the buffer 39. A short packet arrives first interms of time, therefore, the short packet is selected automatically and preferentially, and sent out to a communication line 4 through a repeater 30.

公开(公告)号：JPS60245336A

公开(公告)日：1985-12-05

申请号：JP10196284

申请日：1984-05-21

Applicant: FUJITSU LTD

Inventor： NAKAHARA YASUHIRO ,  MITA TERUYOSHI ,  KITANO YOSHIHIRO ,  NEGISHI HITOSHI ,  NAKAMURA OSAMU

IPC: H04B1/74 ,  H04L12/437

Abstract: PURPOSE:To execute easily and quickly a rise of a communicating system of a ring- shaped circuit by providing a means for sending out an intrinsic identification code to a communicating circuit, and a means for receiving the identification code from the communicating circuit, and entering a holding state when a receiving identification code and a sending-out identification code do not coincide with each other. CONSTITUTION:Circuit supervisory devices 26, 27 are devices of the same constitution, have a function for always sending out a signal frame of a prescribed format by a prescribed timing, and a function for supervising a circuit, etc., both of them become existing and stand-by devices, respectively, and only the existing device is operated actually so as to send out the signal frame to a transmitting circuit. An intrinsic identification code for displaying the own device is inserted into the signal frame sent out of the circuit supervisory devices 26, 27 and sent, and in case the identification code fed back through a ring-shaped circuit is different from the identification code sent out of the own device, the circuit supervisory device which has detected it is held as a stand-by device, and the device whose identification code has coincided continues a circuit supervisory operation as an existing device. In this way, control of an existing/stand-by conversion is executed automatically.

公开(公告)号：JPS60128742A

公开(公告)日：1985-07-09

申请号：JP23726383

申请日：1983-12-16

Applicant: FUJITSU LTD

Inventor： NAKAHARA YASUHIRO ,  MITA TERUYOSHI ,  KITANO YOSHIHIRO ,  NEGISHI HITOSHI ,  NAKAMURA OSAMU

IPC: H04L12/00 ,  H04L11/00

Abstract: PURPOSE:To reduce ineffective operations of a data terminal device and improve efficiency of data communication by reporting the data communication impossible state to the data terminal device when a highway monitor device performs transmission line operations because of occurrence of troubles of the transmission line or external indications. CONSTITUTION:A highway monitor device SV is provided with a trouble processing control part ERC16, and a trouble processing bit LNPB17 is provided in an FH5. If the SV detects troubles and a transmission line operation occurs by the transmission operation for trouble recovery processing or an operator's indication, the LNPB17 in the FH5 is set by the ERC. A common control part 10 of a station node 2 identifies the transmission line trouble or the transmission line operation due to it by recognition of abnormality of a select system due to reporting of an abnormality signal S2 from a receiving and transmitting part 7, reporting of the counted value from a frame counter part 9, or setting of the LNPB19 in the FH5 and detects that data communication is impossible, and the common control part 10 outputs a trouble occurrence signal 18 to each line control part 12.

公开(公告)号：JPS6068742A

公开(公告)日：1985-04-19

申请号：JP17722883

申请日：1983-09-26

Applicant: FUJITSU LTD

Inventor： NEGISHI HITOSHI ,  MITA TERUYOSHI ,  KITANO YOSHIHIRO ,  NAKAHARA YASUHIRO ,  NAKAMURA OSAMU

IPC: H04L12/437

Abstract: PURPOSE:To disconnect only a faulty node by connecting a transmission line of an active system and a spare system by means of the (k-1)-th and (k+1)-th nodes if the k-th node is faulty in a data highway system having a duplicated ring transmission line. CONSTITUTION:If a fault occurs in a node 20k in a duplicated data highway comprising the active system 4 and the spare system 5, a supervisory device 1a detects it and gives a command to a node 20k-1 to connect the active system transmission line 4 and the spare system transmission line 5 via the active system transmission line 4. Then the device 1a gives a command to a node 20k+1 to connect the active system transmission line 4 and the spare system transmission line 5 via the spare system transmission line 5. Thus, the operation of a communication system is continuted by disconnecting the faulty node 20k only.