公开(公告)号：JPS5621446A

公开(公告)日：1981-02-27

申请号：JP9820679

申请日：1979-07-31

Applicant: FUJITSU LTD

Inventor： AKIBA TADASHI ,  IIJIMA KOUJI ,  SAKAI KEN ,  KUSAYANAGI SHIYUUFUU

IPC: H04L29/06 ,  H04L12/951

Abstract: PURPOSE:To realize high-efficiency transmission with an economical constitution, by inserting information, which indicates whether the data length is a fixed length or not, and information, which indicates the data length or the dummy data length only for the data length of a fixed length or less. CONSTITUTION:Transmission data is segmented by every prescribed length and is divided into data P1-Pn of one-packet share. Prescribed-length data P1-Pn-1 are provided with flag Q, which indicates whether data is a prescribed length or not, following to the synchronizing flag F, address information A, packet control information, and other information; and if data is a prescribed length, flag Q is set to ''1'', and data is inserted after the flag, and check bit CRC is added, and synchronizing flag F is added at last. Meanwhile, if data is shorter than the prescribed length like data Pn, flag Q is set to ''0'', and information N indicating the length of data is inserted after flag Q, and dummy data D is inserted after data Pn, thus constituting a fixed-length packet.

公开(公告)号：JPS59191957A

公开(公告)日：1984-10-31

申请号：JP6674383

申请日：1983-04-15

Applicant: Fujitsu Ltd

Inventor： IIJIMA KOUJI ,  EDA SUSUMU ,  MATSUDA TAKASHI

IPC: H04B3/46 ,  H04L12/00

CPC classification number: H04L12/00

Abstract: PURPOSE:To facilitate easy detection for a short break of a power supply of an end office by always transmitting a signal showing that the power supply of a terminal is turned on to a central end office device. CONSTITUTION:An initial program load (IPL) request is given when the power supply of an end office 2 is turned on for transfer of signals between a central end office device 1 and the end office device 2. The device 1 gives an IPL to a desired station. Then the device 1 stores the end of the IPL of the device 2 when receiving an ACK signal from the device 2. Hereafter the above-mentioned operation is repeated between the device 1 and all end office devices. Then the communication is carried out among end offices. If the device 2 has a short break of the power supply during operation, the device 2 delivers an IPL (IPL') request. Thus the device 1 knows the short break of the device 2 since the IPL' request is the second IPL request.

Abstract translation: 目的：通过总是发送一个表示终端的电源被接通到中央终端设备的信号，便于轻松检测终端电源的短路。 构成：在终端办公室2的电源被接通以在中央终端办公室设备1和终端设备2之间传送信号时给出初始程序加载（IPL）请求。设备1给出IPL 所需车站。 然后，当从设备2接收到ACK信号时，设备1存储设备2的IPL的结束。之后，在设备1和所有终端设备之间重复上述操作。 然后在终端机构之间进行通信。 如果设备2在操作期间电源短暂，则设备2递送IPL（IPL）请求。 因此，设备1知道设备2的短暂中断，因为IPL请求是第二IPL请求。

公开(公告)号：JPS58130648A

公开(公告)日：1983-08-04

申请号：JP1301282

申请日：1982-01-29

Applicant: FUJITSU LTD

Inventor： IIJIMA KOUJI ,  KOBAYASHI OSAMU ,  UOZUMI ITSUKAN

IPC: H04B3/46 ,  H04B3/462 ,  H04L12/42 ,  H04L12/437

Abstract: PURPOSE:To simplify the reduction and control of a memory and at the same time to eliminate a change of the contents of a memory region or the replacement of an ROM in case an RTE is increased or shifted, by transmitting again a loop-back instruction to fix the loop-back after detecting a step-out and then having the same control in the backward direction. CONSTITUTION:When a central end office device CTE10 detects a step-out at both sides of the using and spare systems, a remote end office device CTE1 and an RTE4 transmit a command via using and spare transmission lines 12 and 13' respectively to all RTE1-5 to fold the loop-back. Receiving this command, the RTE1 is set in a loop-back folding state and at the same time tranmits an instruction to the next RTE2. In a folding state, each of RTE1-5 delivers an answer signal to a CTE10. For this answer signal, a physical address of own station is written to an address region 6 as shown in the diagram. Otherwise the information showing the state of own station is written to a response region 7, and at the same time a flag is set up in a signal region 8 showing that a loop-back is being folded. Thus the transmission is carried out to the CTE10.

公开(公告)号：JPS5833340A

公开(公告)日：1983-02-26

申请号：JP13192881

申请日：1981-08-22

Applicant: FUJITSU LTD

Inventor： IIJIMA KOUJI

IPC: H04J3/24 ,  H04L12/42

Abstract: PURPOSE:To attain the automatic confirmation of addresses and to facilitate the detection of an error for the double address in a data way system, by having a reply from a device of a remote and office with a test command given from a central monitor station. CONSTITUTION:A central monitor station CT and plural remote end office devices RT1-RTn form a loop data way system. When the address is confirmed, the station CT turns on a test flag, clears the counting of nodes and the counting at the own station and adds the physical addresses of the devices RT1-RTn. The devices RT1-RTn extract the test time slot regardless of the physical address, increases the count value of nodes if the test flag is turned on, turns off the test flag for the devices RT1-RTn which are designated by the physical addresses and increases the count value of nodes and the count value at the own station to feed these values to the subsequent remote end office devices.

公开(公告)号：JPS57212848A

公开(公告)日：1982-12-27

申请号：JP9758581

申请日：1981-06-25

Applicant: FUJITSU LTD

Inventor： IIJIMA KOUJI

IPC: H04B3/46 ,  H04B3/462 ,  H04L12/42 ,  H04L12/437

Abstract: PURPOSE:To simplify the processing to be remedied only with one sort of loop back command, by performing loop back to other loop lines after the catching of the other loop lines is detected owing to out of synchronism derived from a line failure. CONSTITUTION:If two lines have a failure at a point X, out of synchronism is caused at remote terminal devices 4 and 5 catching a loop line 6 of the #0 system, and resulting into a catching of a loop line 7 of the #1 system. In this state, remote terminal devices 3 and 4 are prepared to receive a loop back command. Thus, in the remote terminal device 3, the catching of the loop line 6 of the #0 system and the instruction of the loop back are informed to a line control section. Then, the line control section performs loop back from the loop line 6 of the #0 system to the loop line 7 of the #1 system. Similarly, in the remote terminal device 4, the loop back from the loop line 7 of the #1 system to the loop line 6 of the #0 system is performed.

公开(公告)号：JPS5765038A

公开(公告)日：1982-04-20

申请号：JP14161180

申请日：1980-10-09

Applicant: Fujitsu Ltd

Inventor： IIJIMA KOUJI ,  MITA TERUYOSHI

IPC: H04L1/00 ,  H04L12/43

CPC classification number: H04L12/43

Abstract: PURPOSE:To monitor circulating data simply with good transmission efficiency, by concentratingly monitoring the data at the monitor station and performing the abolition of the circulating data completely, through the provision of two types of 2-bit flag area in the data format. CONSTITUTION:A monitor station SV monitoring data and a plurality of node stations ND1-ND4 are connected in loop with a transmission line to constitute the loop network. In the data format of the time slot used for this network, a control area 1, opposing party address area 2, data area 3 and check bit area 4 are provided, and the area 1 is provided with a monitor station passing flag bit SV flag and a usage display flag bit B/I flag. When data are transmitted at stations ND1- ND4, the B/I flag is set, and the SV flag is set when the time slot passes through the monitor station SV, and when both the SV and B/I flag are detected at the monitor station SV, the data of the time slot is abolished.

Abstract translation: 目的：通过集中监控监控站的数据，完全废除循环数据，通过提供数据格式的两种类型的2位标志区域来监控循环数据。 构成：监视站SV监视数据和多个节点站ND1-ND4与传输线环路连接，构成环路网络。 在用于该网络的时隙的数据格式中，提供控制区域1，对方地址区域2，数据区域3和校验位区域4，并且区域1设置有通过标志位SV标志的监视站 和使用显示标志位B / I标志。 当数据在站点ND1- ND4发送时，设置B / I标志，并且当时隙通过监视站SV时设置SV标志，并且当监视器检测到SV和B / I标志时 站SV，时隙的数据被取消。

公开(公告)号：JPS55161449A

公开(公告)日：1980-12-16

申请号：JP6839279

申请日：1979-05-31

Applicant: FUJITSU LTD

Inventor： TAKAHASHI OSAMU ,  AKIBA TADASHI ,  MORIKAWA HISASHI ,  IIJIMA KOUJI

IPC: H04L1/22 ,  H04B1/74

Abstract: PURPOSE:To improve reliability of an auxiliary transmission line, by transmitting a monitor signal to not only the current transmission line but also the auxiliary transmission line to monitor always faults. CONSTITUTION:Synchronizing parts 3 and 4 extract the synchronizing signal from the frame signal for monitor included in signals of current input transmission line 11 and auxiliary input transmission line 13 and apply it to control part 6. Control part 6 controls switching part 5 by this syncronizing signal so that frame signals for monitor of the current transmission line and the auxiliary transmission line can be input to control part 6 correctly. The current transmission line and the auxiliary transmission line are constituted in a loop, and frame signals for monitor transmitted from current output transmission line 12 and auxiliary output transmission line 14 of monitor station 10 respectively circulate once through transmission lines and come to transmission lines 11 and 13 respectively. Consequently, when a fault occurs in any of both transmission lines, control part 6 performs processings such as alarm immediately.