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1. 发明专利

JPH04199933A NETWORK MANAGEMENT SYSTEM AND ITS OPERATION METHOD 失效
公开(公告)号：JPH04199933A
公开(公告)日：1992-07-21
申请号：JP33160790
申请日：1990-11-29
申请人： HITACHI LTD , HITACHI INF & CONTROL SYST , HITACHI INFORMATION NETWORK
发明人： SUZUKI MICHIO , SASAKI RYOICHI , SHINNAI KOSUKE , NAGAI YASUHIKO , KAGEI TAKASHI , TANAKA YASUHIRO , MIZUGUCHI KEIZO , SAITO MASATO , IKEBA GORO , IIOKA KENZO , HAYASHI MASAYUKI , NIINOBE SADAO
IPC分类号： G06F17/30 , G06F13/00 , H04L12/24 , H04L12/26
摘要： PURPOSE:To economically realize a management system by defining a management object instance becoming a management object through the use of the management system of totally same constitution and the same function at the time of managing an information network by means of dividing it into plural sub-networks different in the functions. CONSTITUTION:A management information definition template 11 is set to be a management information base 10 for managing the network and the attribute of the object existing in respective units is defined by object identifier information 12 and the management object instance 13 of tree structure, which is the real management object, is stored. The management object instance tree is composed of totally same hardware and software excluding a case when it is composed only of the management object instance 13 within a self management range. At the time of managing the management object instance 13, the class is obtained and the management function corresponding to class information is executed. Thus, the economical management system can be obtained.

2. 发明专利

JPH02277334A CONTROL SYSTEM FOR CONSTITUTED INFORMATION OF INFORMATION NETWORK 失效
公开(公告)号：JPH02277334A
公开(公告)日：1990-11-13
申请号：JP9735189
申请日：1989-04-19
申请人： HITACHI LTD , HITACHI INFORMATION NETWORK
发明人： SUZUKI MICHIO , SASAKI RYOICHI , SHINNAI KOSUKE , HAYASHI MASAYUKI , KAGEI TAKASHI , MIZUGUCHI KEIZO
IPC分类号： H04L12/00
摘要： PURPOSE:To easily control constituted information of the entire network by reporting constituted information to an integrated network controller. CONSTITUTION:A unifying controller 100 requests the transmission of the constituted information provided to sub-network management equipments 200-500. A transmission request and the constitution information are received by communication control programs 101a-d. The received constituted information of each subnetwork is given to a constituted information edit program 102. The program 102 defines it to which exchange or application device a subscriber line port of a multiplex allotting distribution equipment connects. A port list of a subscriber line is displayed on a display device 10-2 by using a man-machine interface control program 104. The inputted value is checked by a constituted information check program 103 and when the processing is finished for all exchanges, this processing is finished.

3. 发明专利

JPH02131044A POLLING SEQUENCE DECIDING SYSTEM 失效
公开(公告)号：JPH02131044A
公开(公告)日：1990-05-18
申请号：JP28358288
申请日：1988-11-11
申请人： HITACHI LTD
发明人： KAGEI TAKASHI , SASAKI RYOICHI , SUZUKI MICHIO , SHINNAI KOSUKE , NAKAMURA TSUTOMU , KAGATA TAKASHI
IPC分类号： H04L5/22 , H04L12/24 , H04L12/26 , H04M11/10
摘要： PURPOSE:To decrease a fault detection time caused in a high speed digital line by averaging a state monitor interval relating to a high speed digital line, and deciding the order of polling in the monitor system giving polling to a high speed multiplex concentration and distribution device so as to monitor the state of a high speed digital network. CONSTITUTION:Based on the priority of high speed digital lines 30-43, a line subject to polling (called a polling line to high speed multiplex concentrating and distribution device) is decided to a relevant multiplex concentration and distribution device among high speed multiplex concentrating and distribution devices 20-27 till a polling table is circulated. Then any of the high speed multiplex concentrating and distribution device connecting to a high speed digital line is subjected the polling. Then a time interval required for the polling to any of the high speed multiplex concentrating and distribution device connecting to the high speed digital line again (called the state monitor interval relating to the high speed digital line) is selected to be a quotient of the polling period divided by the sum of number of times of polling to the high speed multiplex concentrating and distribution device connecting to the high speed digital line (called the average state monitor interval of high speed digital line).

4. 发明专利

JPH01243746A FAULT DIAGNOSTIC SYSTEM 失效
公开(公告)号：JPH01243746A
公开(公告)日：1989-09-28
申请号：JP6939688
申请日：1988-03-25
申请人： HITACHI LTD
发明人： NAKAMURA TSUTOMU , SHINNAI KOSUKE , SUZUKI MICHIO , SASAKI RYOICHI
摘要： PURPOSE:To clearly display candidate parts of fault parts from the ones at higher probability by separating the fault part in a fault state generated in a network based on fault information and the fault generation history information of the fault parts. CONSTITUTION:A center device 100 successively execute polling to multiplexing devices 101 and 102, and the fault information is collected as its response data. At such a time, the center 100 first exchanges commands to set a connection with the multiplexing device 101 and 102, and after the completion of the connection setting, it collects the fault information. Based on the fault information and the fault generation history information of the fault part, the fault part in the fault state generated in the network is separated.

5. 发明专利

JPS62108625A SATELLITE COMMUNICATION SYSTEM 失效
公开(公告)号：JPS62108625A
公开(公告)日：1987-05-19
申请号：JP24794185
申请日：1985-11-07
申请人： HITACHI LTD
发明人： YAGI HIROYUKI , SASAKI RYOICHI , SHINNAI KOSUKE
IPC分类号： H04B7/15 , H04B7/208
摘要： PURPOSE:To improve the deterioration in the communication state caused by the variation in the frequency deviation of each earth station by selecting an earth station irradiating an optimum pilot signal automatically. CONSTITUTION:The 1st earth station 10, the 2nd earth station 20 and the 3rd earth station 30 send respectively transmission signals 14, 24, 34 respectively to a satellite 40 and receive reception signals 16, 26, 36 from the satellite for the communication. Further, a signal (pilot signal) being a reference of the communication is sent in the transmission signal from any station and each station decides the frequency and reception level of the signal received by the own station in matching with the frequency and output of the pilot signal. When a station irradiating the more optimum pilot signal than that of the own station is found out in the earth stations irradiating the pilot signal, the transfer request of the pilot signal is supplied to the said earth station.

6. 发明专利

JPS61212139A ABNORMAL CONGESTION PREVENTING SYSTEM FOR PACKET SWITCHING NETWORK 失效
公开(公告)号：JPS61212139A
公开(公告)日：1986-09-20
申请号：JP5221085
申请日：1985-03-18
申请人： HITACHI LTD
发明人： SASAKI RYOICHI , TAKARAGI KAZUO , MIYAZAKI SATOSHI , SHINNAI KOSUKE , YAGI HIROYUKI
IPC分类号： H04B7/15
摘要： PURPOSE:To prevent a congestion, to decrease a scraping, packet, and to improve the communication efficiency by sending a part of a packet which has encountered the congestion, and a relaying failure informing packet, to an object station or its periphery utilizing a satellite communication. CONSTITUTION:In case when a value of a relaying switchboard number counter exceeds an allowable value of a packet network by a packet relaying processing, or an alternate station relaying circuit to the next switchboard cannot be determined, a packet is sent to an antenna 41 of the other communication exchange through an antenna 44 and a communication satellite 50, and the packet is delivered to a switchboard 11. In case when the packet cannot be sent to the object station, it is sent to its adjacent station, and if it is also impossible, this packet is scrapped. At the same time, a relaying failure informing packet is edited, and transmitted to a transmitting origin switchboard 15 and a purpose switchboard 11 through the communication satellite 50.

7. 发明专利

JPH0476651A INFORMATION NETWORK CONTROL SYSTEM 失效
公开(公告)号：JPH0476651A
公开(公告)日：1992-03-11
申请号：JP18394590
申请日：1990-07-13
申请人： HITACHI LTD
发明人： SHINNAI KOSUKE , NAGAI YASUHIKO , SUZUKI MICHIO , SASAKI RYOICHI , MIZUGUCHI KEIZO , IKEBA GORO , IIOKA KENZO
IPC分类号： G06F13/00 , G06F17/30 , H04L12/24 , H04L12/26
摘要： PURPOSE:To easily and efficiently recognize the state of a network by referring to, selecting, and gathering necessary information in a control information data base, converting information from a network controller into data in a list, and displaying the data. CONSTITUTION:This system consists of the network controller 101 and a display device 103. A control object is leveled according to the geographic position of the control object, the classifications of an object device, the controller, etc., and the model where they are arranged logically in a tree shape is used by the network controller 101 to refer to, select, and gather the necessary information in the control information data base 105 stored with the control attribute of the control object body. Further, the list is outputted on the screen of a display device 103 and information from the network controller 101 is converted into data in the list and displayed. Consequently, necessary constitution information of the control attribute information on the control object body constituting the control network can be displayed on the display device by specifying the level of an optional control tree.

8. 发明专利

JPS6422137A HIGH RELIABILITY SYSTEM FOR NETWORK SYSTEM 失效
公开(公告)号：JPS6422137A
公开(公告)日：1989-01-25
申请号：JP17699487
申请日：1987-07-17
申请人： HITACHI LTD
发明人： SHINNAI KOSUKE , NAKAMURA TSUTOMU , SASAKI RYOICHI
IPC分类号： H04B7/155 , H04L7/00
摘要： PURPOSE:To prevent out-of-synchronism when plural clock sources exist by supplying a general common clock usually and supplying a private station clock when the clock is at fault, to the interface of respective lines. CONSTITUTION:Usually, one side of clocks 117 and 118 extracted from receiving data 106 and 111 by clock extracting devices 33 and 43 in NTT interfaces 31 and 41 is selected as a master clock 119 with a clock selecting part 52 in a clock deciding device 5. The clock 119 is supplied through PLLs 25, 35 and 45 to transmitting receiving LSI 22, 32 and 42, and transmitting data 102, 107 and 112 are transmitted by using the clock. On the other hand, when the losing of the clocks 117 and 118 is detected by a clock deciding part 53, a main/sub- switching part 6 is switched, and a clock 116 extracted from receiving data 101 with a clock extracting device 23 in a private station interface 21 is selected as the master clock 119 by a selecting part 52.

9. 发明专利

JPS63280537A FAULT STATE REPORTING SYSTEM 失效
公开(公告)号：JPS63280537A
公开(公告)日：1988-11-17
申请号：JP11461187
申请日：1987-05-13
申请人： HITACHI LTD
发明人： NAKAMURA TSUTOMU , SHINNAI KOSUKE , SASAKI RYOICHI , SUZUKI MICHIO , AKIYAMA FUMIO
IPC分类号： G06F11/30 , G06F13/00 , H04L13/00 , H04L29/14
摘要： PURPOSE:To quicken the detection of fault occurrence by providing a function generating a fault status report where an instantaneous failure status of each communication line and each node, a fault status based on the result of monitor within a prescribed time while being roughly classified depending on the fault status and a function sending the report to a network management center to each node. CONSTITUTION:Multiplexers 1,2 are connected to a ground high speed digital line 4 by a satellite line 7. The fault information at the instantaneous time and withinprescribed time collected by the multiplexer 1 is classified depending on the fault state and communicated to the center 11 in a form of a status word, for example. Moreover, the multiplexer 1 is provided with a function monitoring the state of the communication line and the multiplexer 1 itself at a sampling time interval, a function generating the fault status report comprising the result of monitor of a specified time and the instantaneous value at present in a form of status word, for example, aud a function returning the report in a form of the status word in response to the polling from the center 11. Thus, the time till the detection of fault occurrence is shortened.

10. 发明专利

JPS62114346A SYSTEM FOR OPTIMIZING TRANSMISSION EFFICIENCY 失效
公开(公告)号：JPS62114346A
公开(公告)日：1987-05-26
申请号：JP25272285
申请日：1985-11-13
申请人： HITACHI LTD
发明人： SHINNAI KOSUKE , NAKAMURA TSUTOMU , SASAKI RYOICHI
IPC分类号： H04L29/08 , H04L1/00 , H04L13/00
摘要： PURPOSE:To optimize the transmission efficiency by calculating a transmission parameter, which maximizes the effective transmission speed, in accordance with the state of a communication line to set the length of a frame in a communication controller of a computer network. CONSTITUTION:A transmission data processing part 53 and a reception data processing part 56 are controlled by a main control part 54 of a communication controller 4 to supply a data transmission time and a reception response time corresponding to this data to a transmission frame length calculating part 55. The calculating part 55 calculates the information frame length parameter, which maximizes the effective transmission speed, in accordance with the difference between both times and sets the frame length. Variable length information frames are transmitted in this manner to optimize the transmission efficiency.

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