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1. 发明专利

JPH0470143A SYSTEM FOR EXTENDING LOOP-SHAPED TRANSMISSION LINE 失效
公开(公告)号：JPH0470143A
公开(公告)日：1992-03-05
申请号：JP18223590
申请日：1990-07-10
申请人： HITACHI CABLE
发明人： HENMI TOMOHISA
IPC分类号： H04B10/27 , H04B10/035 , H04B10/07 , H04B10/275 , H04B10/291 , H04L12/42
摘要： PURPOSE:To improve ability for removing a fault by making the input/output of each port selectable and switchable and constituting a loop while executing transmission/reception between stations by using one optical fiber. CONSTITUTION:One master station and plural slave stations are connected in the shape of the loop by the two cores of optical fibers, and the repeating part of each station is equipped with four ports 13-15. By switching the input 1 output of each port, the loop is extended while making confirmation mutually between the adjacent stations. When the fault between the respective stations is generated at one spot, the loop is not backed but made normal, and since the loop can be returned by successively changing over respective optical switches 13 from the station opposite to the station detecting an optical signal for the slave stations, the stations are not disconnected from the loop even when the double fault is generated. Thus, ability for removing the fault is improved.

2. 发明专利

JPS62150454A DIRECT MEMORY ACCESS SYSTEM 失效
公开(公告)号：JPS62150454A
公开(公告)日：1987-07-04
申请号：JP29043985
申请日：1985-12-25
申请人： HITACHI CABLE
发明人： TAKAGI YOSHIKI , HENMI TOMOHISA
IPC分类号： G06F13/28
摘要： PURPOSE:To restart the operation of a microprocessor by outputting a signal being identical to a transfer request signal to a direct memory access (DMA) control section when an operation stop time of the microprocessor exceeds a prescribed value. CONSTITUTION:When a transfer request signal S1 from an input/output control section 1 goes to a low level due to noise, since an output signal S5 of an OR circuit 6 goes to a low level, no transfer enable signal S4 is outputted from a DMA control section 2. When a count of the counter section 7 exceeds a prescribed value, an output signal S7 is outputted. Thus, since the transfer enable signal S4 is outputted from the DMA control section 2 by an output signal S5 of the OR circuit 6, the counter section 7 is reset and the output signal S7 restores to a low level. Thus, since the output signal S5 of the OR circuit 6 goes to a low level, the stop request signal S2 from the DMA control section 2 goes to a low level and the operation of the microprocessor is restarted.

3. 发明专利

JPH05153146A TERMINAL INTERFACE CONTROL SYSTEM FOR LAN 失效
公开(公告)号：JPH05153146A
公开(公告)日：1993-06-18
申请号：JP31264991
申请日：1991-11-27
申请人： HITACHI CABLE
发明人： HENMI TOMOHISA
IPC分类号： H04L12/42
摘要： PURPOSE:To prevent unnecessary data from being outputted to a terminal equipment by multiaddress-communicating the reconstitution of a network to each station by the same frame constitution as a normal time, at the time of reconstituting the network. CONSTITUTION:At the time of receiving a frame 19, each station 1 transmits the frame 19 through a signal line 15 to a frame decomposing part 16, and an address, control information part, and reception data to the terminal equipment are respectively separated to a signal line 5, signal line 17, and signal line 6. Whether the address is for its own station or for the entire station is identified by an address comparing part 7, and a gate circuit 12 with an output control terminal is opened by setting an FF circuit 10 by a signal line 11 when the address is for its own station. On the other hand, when the address is for the entire station, it is interpreted as a network constitution, and the gate circuit 12 is closed by resetting the FF circuit 10, so that the reception data can be prevented from being outputted from a data field 4 to the terminal device.

4. 发明专利

JPH0522319A TIME DIVISION MULTIPLEX CHANNEL ACCESS SYSTEM 失效
公开(公告)号：JPH0522319A
公开(公告)日：1993-01-29
申请号：JP17017391
申请日：1991-07-10
申请人： HITACHI CABLE
发明人： HENMI TOMOHISA
IPC分类号： H04J3/06 , H04L12/42
摘要： PURPOSE:To increase a maximum connection line number of a loop transmission line by providing an in-station circulation frame circulation in stations to the stations connected to a loop transmission line so as to reduce the number of frames in the loop circulating frame. CONSTITUTION:An in-station circulation frame 14 consists of a header 15 and plural slots 16 and is circulated through a ring FIFO 13 when the header 5 of a loop circulation frame reaches. In this case, a data in a data slot 16 from a terminal equipment 1 is delivered to a reception register 82 for a terminal equipment 12 and the succeeding data of a terminal equipment 11 is stored in an idle slot 16. Thus, only one frame in a loop circulating frame 4 is used to exchange a data between the terminal equipment 11, 12.

5. 发明专利

JP2001075914A MULTIDROP CONNECTION SYSTEM FOR RS-232C LINE 失效
公开(公告)号：JP2001075914A
公开(公告)日：2001-03-23
申请号：JP25506499
申请日：1999-09-09
申请人： HITACHI CABLE
发明人： HENMI TOMOHISA
IPC分类号： G06F13/14
摘要： PROBLEM TO BE SOLVED: To provide a multidrop connection system for RS-232C line with which it is not necessary for a slave station to control an RS signal without requiring an additional device for performing a multidrop connection. SOLUTION: Concerning the multidrop connection system for RS232C line with which the multidrop connection between terminals connected by an RS-232C interface circuit 2 is performed by outputting a line connection request signal to a transmission base part 5 inside a transmitter while using the RS signal of an RS-232C signal line, in this case, the line connection request signal is generated while using a start bit in the character format of asynchronous data in place of the said RS signal.

6. 发明专利

JP2000078100A Multi-drop connecting method for multiframe interface and interface device therefor 审中-公开
标题翻译：多通道接口及其接口设备的多通道连接方法
公开(公告)号：JP2000078100A
公开(公告)日：2000-03-14
申请号：JP24559698
申请日：1998-08-31
申请人： Hitachi Cable Ltd , 日立電線株式会社
发明人： HENMI TOMOHISA
IPC分类号： H04J3/00 , H04J3/08 , H04L12/42 , H04Q3/58
摘要： PROBLEM TO BE SOLVED: To provide a multi-drop connecting method for multiframe interface improved in the availability of PBX, and to provide the interface device therefor.
SOLUTION: At the time of mutually connecting plural stations 61, 62 and 63 connected with PBX 64, 65 and 66 through a transmission path 67 to send a multiframe from the PBX between the respective stations, the header and data of the multiframe from the PBX are decomposed into the headers and data of individual channels to form a rotation frame consisting of plural time slots housing a pair of the header and data of one channel in one time slot, this rotation frame is sent to the transmission path 67 and the respective stations 61, 62 and 63 are multi-drop-connected to this path 67.
COPYRIGHT: (C)2000,JPO
摘要翻译：要解决的问题：为提供PBX可用性的多帧接口提供多点连接方法，并提供其接口设备。解决方案：在通过传输路径67将与PBX64,65和66连接的多个站61,62和63相互连接以在各个站之间从PBX发送多帧时，来自PBX的多帧的报头和数据被分解为单个通道的头部和数据，以形成一个旋转框架，该旋转框架包含一个时隙中的一对头部和一个通道的数据的多个时隙，该旋转帧被发送到传送路径67和各个站 61,62和63是多点连接到该路径67。

7. 发明专利

JPH08130548A SYSTEM AND METHOD FOR TIME-DIVISION MULTIPLEX TRANSMISSION 失效
公开(公告)号：JPH08130548A
公开(公告)日：1996-05-21
申请号：JP26676094
申请日：1994-10-31
申请人： HITACHI CABLE
发明人： HENMI TOMOHISA
IPC分类号： H04J3/08 , H04L12/42
摘要： PURPOSE: To improve the capacity of transmission without increasing a transmission speed by connecting respective equipments having terminal interface parts provided with plural transmitting/receiving parts, decoding parts, encoding parts, and transmission control parts by transmission lines corresponding to the number of transmission parts. CONSTITUTION: A terminal interface part 6 in each time-division multiplex transmission equipment 11 is constituted of two receiving and transmitting registers 5, 7 and two receiving and transmitting buses 4, 8, a transmission control part 3, a decoding part 2 and a receiving part 1 are connected to each of the two receiving buses 4 and a transmission control part 3, an encoding part 9 and a transmission part 10 are connected to each of the two transmitting buses 8. Plural transmission equipments 11 arranged on required positions are mutually connected like a ring through two transmission lines 12 and a time-division multiplex PCM signal in each frame constituted of plural time slots is circulated through the transmission lines 12. Transmitting data from a terminal equipment are inputted to the interface part 6 and temporarily stored in the two transmitting registers 7 to transmit/receive the data in accordance with the circulation of transmission frames.

8. 发明专利

JP2002185483A FAULT AVOIDANCE SYSTEM FOR LOOP-LIKE COMMUNICATION CIRCUITS 失效
公开(公告)号：JP2002185483A
公开(公告)日：2002-06-28
申请号：JP2000377415
申请日：2000-12-12
申请人： HITACHI CABLE
发明人： HENMI TOMOHISA
IPC分类号： H04L12/28 , H04L12/437 , H04L12/46
摘要： PROBLEM TO BE SOLVED: To provide a fault avoidance system of loop-like communication circuits, which suppresses a communication service interruption due to a fault from propagating. SOLUTION: In a time division multiplex transmission system using loop-like communication circuits a key station monitors the operation of sub-stations and, if detecting a abnormal sub-station in operation, restructures a loop-like communication circuit, except this sub-station. This restructuring of the loop-like communication circuit, except the abnormal station, prevents the communication service interruption from propagating to other sound stations.

9. 发明专利

JPH10164112A SYSTEM FOR CONTROLLING NETWORK CONFIGURATION 失效
公开(公告)号：JPH10164112A
公开(公告)日：1998-06-19
申请号：JP32392396
申请日：1996-12-04
申请人： HITACHI CABLE
发明人： HENMI TOMOHISA
IPC分类号： H04L12/437
摘要： PROBLEM TO BE SOLVED: To provide a network consfiguration controlling system whereby a processing for constituting a network is simplified and executed at high speed. SOLUTION: Respective stations 1 and 2 detect a fault in the transmission path of an immediately upper stream, turning-back is executed by the stations 1 and 2 which detect the fault, a self-station number is reported to a master station 1 and the master station 1 gives an instruction to the stations 1 and 2 which have to execute the turning-back of an opposite side based on the reported station number. The master station 1 recognizes the station with the fault by a report so that the network is quickly re-constituted.

10. 发明专利

JPH08265351A TIME DIVISION MULTIPLEX TRANSMISSION SYSTEM 失效
公开(公告)号：JPH08265351A
公开(公告)日：1996-10-11
申请号：JP6368595
申请日：1995-03-23
申请人： HITACHI CABLE
发明人： TAKAHATA AKIRA , HENMI TOMOHISA
IPC分类号： H04L12/42
摘要： PURPOSE: To improve the utilizing efficiency of the time slot in a time division multiplex transmission system. CONSTITUTION: In a time division multiplex transmission system, the frame 3 composed by including a frame header 4 showing the head and the time slot 5 to be transmitted after the frame header 4 is defined as a transmission unit, and the delivery and receipt of the information are performed between the stations 2 connected to a transmission line 1. In this transmission system, the frame number 6 for specifying the frame 3 is added between the frame header 4 and the time slot 5. On a station transmission line 1, plural frames 3 can simultaneously exist.

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