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1. 发明专利

JPH11220475A COMMUNICATION PROTOCOL PROCESSING METHOD AND COMMUNICATION PROTOCOL PROCESSOR 失效
公开(公告)号：JPH11220475A
公开(公告)日：1999-08-10
申请号：JP2201398
申请日：1998-02-03
申请人： HITACHI LTD
发明人： SUZUKA TETSUYA , NAKAYASHIKI SUSUMU , ABE MOTOI , YOKOYAMA TATSUYA
IPC分类号： H04L29/06 , H04L12/28 , H04L12/70 , H04Q3/00
摘要： PROBLEM TO BE SOLVED: To attain high speed protocol processing with a small logic amount by using a programmable logic device. SOLUTION: A Reconfiguration conversion section 2 identifies an event generated in an event reception part 7 and a connection type of a protocol processing object, selects a Configuration Data in which inter-transmission connection to realize the processing to be executed for the generated event depending on identification contents and loads the Data to a Program SRAM 3S. A programmable logic element 3L forms connection among internal elements and executes the processing according to loaded Configuration Data.

2. 发明专利

JPH09107392A COMMUNICATION METHOD 失效
公开(公告)号：JPH09107392A
公开(公告)日：1997-04-22
申请号：JP28927195
申请日：1995-10-11
申请人： HITACHI LTD
发明人： NAKAYASHIKI SUSUMU , ABE YOSHITSUGU , KOHAZU MITSUGI , TAKEMI KIYOYUKI , KINOSHITA OSAMU
IPC分类号： G06F13/00 , H04L1/00 , H04L1/18 , H04L12/28 , H04L12/66 , H04L29/08
摘要： PROBLEM TO BE SOLVED: To improve the communication performance such as a computer throughput and a turnaround time by processing the communication with a communication controller via a local connection as communication with a terminal equipment. SOLUTION: At application of power, a boot program stored in a ROM 104 is started and information to control a communication controller 100 and control information for a LANA 130 and a CHA 140 are loaded from a storage device 122 to an MM 105 as initial program processing. Then the program is down-loaded from the MM 105 to the LANA 130 and the CHA 140 under the control of a CPU 101. For example, data sent from a HOST 200 are stored once in the CHA 140. Then the data reception from the CHA 140 is made by the CPU 101, which transfers the data in the CHA 140 to the MM 105 via a main bus 110 and sends the data to the LAN 301 via the LANA 130.

3. 发明专利

JPH0251306B2 失效
公开(公告)号：JPH0251306B2
公开(公告)日：1990-11-07
申请号：JP4232181
申请日：1981-03-25
申请人： HITACHI LTD
发明人： NAKAYASHIKI SUSUMU , KIDA MASAHIKO , HASHIMOTO TOYOKAZU
IPC分类号： H04L1/22 , H04L12/42

4. 发明专利

JPH02234534A CONTENTION CONTROL SYSTEM BETWEEN NETWORK TENTATIVE MASTER STATIONS 失效
公开(公告)号：JPH02234534A
公开(公告)日：1990-09-17
申请号：JP5386089
申请日：1989-03-08
申请人： HITACHI LTD , HITACHI SOFTWARE ENG
发明人： NAKAYASHIKI SUSUMU , SAKO YOSHITO , MATSUURA FUMIAKI , USHIJIMA KAZUHIRO , KAJITANI IHEI , NIWA TOKUHIRO
IPC分类号： H04L12/42
摘要： PURPOSE:To reduce the intermittent time of a tentative master station based on an identifier by allowing the tentative master station to give the identifier specific to the tentative master station to a management frame, allowing the tentative master station receiving the management frame to discriminate the priority of the tentative master station based on the identifier and to decide the operation in its own station. CONSTITUTION:A ring network consists of a double ring device 1 and a communication control device MAC 2 and a switch device 3. For example, when a time loss fault takes place, a PRG (purge frame) transmission maximum time monitor timer TNT is started. After the PRG is sent, whether or not TNT timeout is checked. When the PRG having a sender address SA 24 larger its own address MAC is received, a station becomes a tentative slave station. when a PRG sent from its own MAC (communication control device) is received, the station becomes a tentative master station, and when the PRG is not received, the transmission of PRG is continued.

5. 发明专利

JPS62258536A CONSTITUTION CONTROL SYSTEM FOR RING NETWORK 失效
公开(公告)号：JPS62258536A
公开(公告)日：1987-11-11
申请号：JP10090286
申请日：1986-05-02
申请人： HITACHI LTD
发明人： NAKAYASHIKI SUSUMU , KASHIO JIRO , HARAKAWA TAKESHI , TOTSUGI YOSHINORI
IPC分类号： H04L12/437
摘要： PURPOSE:To suppress the effect of a fault onto the entire ring system by disconnecting substantially a line concentrator including an abnormal location from a duplicated system transmission line when a ring abnormality is detected and applying the internal diagnostic processing to specify the abnormal location. CONSTITUTION:All terminal stations (ST) 2 are connected to the duplicated system transmission line 3 via an internal transmission line in each line concentrator 1 constituting the ring network system and when it is confirmed that a fault takes place in the inside of a specific line concentrator including the station ST 2 and a branch line 4, the line concentrator 1 disconnects the internal transmission line from the duplicated system transmission line 3 and the internal transmission line itself forms a closed local ring in the line concentrator. Since the local ring including the faulty location is disconnected quickly from the duplicated system transmission line, other normal concentrators 1 are connected to the ring network not including the faulty location and the system is restored immediately to the normal communication state.

6. 发明专利

JPS61248639A SUPERVISORY SYSTEM FOR RESTORATION FROM TRANSMISSION-LINE-FAULT 失效
公开(公告)号：JPS61248639A
公开(公告)日：1986-11-05
申请号：JP8854485
申请日：1985-04-26
申请人： HITACHI LTD
发明人： NAKAYASHIKI SUSUMU , HARAKAWA TAKESHI
IPC分类号： H04B3/46 , H04L12/42 , H04L12/437
摘要： PURPOSE:To simplify supervisory procedures of restoring from a fault by so forming the titled system that the detection of the restoring from the fault is able to be executed only by one station with ring-form transmission line that is adjacent to the location of the fault. CONSTITUTION:In case when a fault occurs in the location 9, the neighboring station 1-B returns a signal from a currently using transmission line 2 to a spare line 3 while a station 1-C does it in the opposite direction. Though the station 1-B is transmitting to the station 1-C the signal received through the line 2, this signal does not need to be the said signal, and the signal 1-B is allowed to transmit a supervisory data for restoration from fault. The station 1-C is returning the reception data through the line 2 as it is, to the station 1-B through a transmission line 3. And the station 1-B transmits from its supervisory-data transmission mechanism 7, which is received by a supervisory- data reception mechanism 8 in order to detect the restoration from the fault. The station 1-C also is provided with the same mechanisms as 7 and 8.

7. 发明专利

JPS61239745A CONTROL METHOD FOR CONSTITUTION OF NETWORK 失效
公开(公告)号：JPS61239745A
公开(公告)日：1986-10-25
申请号：JP8012785
申请日：1985-04-17
申请人： HITACHI LTD
发明人： NAKAYASHIKI SUSUMU , HARAKAWA TAKESHI
IPC分类号： H04L12/42
摘要： PURPOSE:To specify a faulty port without using a mechanism for adding a port number identifier by sending data for constitution control out of a constitution control station when a network becomes abnormal and performing constitution control over a transmission line by a constitution control station which never receives the data until the data is received. CONSTITUTION:A control station ST2 which detects abnormality sets a mode wherein a frame RCF for constitution control is sent out to a downstream side continuously, and an RCF reception monitor timer (TWR) is started to monitor the reception of the RCF, thereby judging whether the control ST should perform constitution control or not. When the RCF is received, it is evident that there is another control ST which should perform constitution control at the upstream side of the control ST, so the TWR is stopped, the continuous transmission mode of the RCF is reset, and the received RCF is relayed to the downstream side. If the TWR enters a time-out state without receiving the RCF, it is judged that there is a faulty port in a line concentrator under the control of the control ST, and the constitution control is started.

8. 发明专利

JPS61193533A STATION RECOGNIZING SYSTEM 失效
公开(公告)号：JPS61193533A
公开(公告)日：1986-08-28
申请号：JP3265485
申请日：1985-02-22
申请人： HITACHI LTD
发明人： NAKAYASHIKI SUSUMU , HARAKAWA TAKESHI
IPC分类号： G06F13/00
摘要： PURPOSE:To allow each station (ST) in a network to grasp existing location information by allowing each ST to grasp relation of information corresponding to the connection order in the data transmitting direction. CONSTITUTION:In a network having a ring transmission line, the upperstream ST in the data transmission direction receives a communication frame earlier than the downstream ST. The ST receiving a frame sets a reception display to apply relaying and the existence of the ST receiving the frame at the upperstream than the own ST is recognized because the reception display is set and it is possible to discriminate a specific ST. The ST sends a frame having a value 'N' by multiple address designation and the ST receiving the frame at first sets the reception display, generates freshly a frame having information incremented by, e.g., '1' to the value and sends the result with multiple address designation. Then each ST repeats the operation. Since the location address in the network of the own ST is recognized, highly efficient operation and maintenance are attained.

9. 发明专利

JPS6184935A Station identification system 失效
标题翻译：站点识别系统
公开(公告)号：JPS6184935A
公开(公告)日：1986-04-30
申请号：JP20621584
申请日：1984-10-03
申请人： Hitachi Ltd
发明人： NAKAYASHIKI SUSUMU , HARAKAWA TAKESHI
摘要： PURPOSE: To allow an inquiry station to identify easily its location by allowing a fixed station receiving a location address inquiry at first to change a frame reception state from non-reception into reception and inform the location address to the location address inquiry station.
CONSTITUTION: When a station capable of moving 1-B transmits a location address request frame including an FC10: line circuit management frame, a SA12: its own ST1-B address, a VI17: location address information request, and an FS16: nonreception, the frame is received at first by a fixed frame station 2-A. This station relays the FS16 as it is already received. Then this frame is received by a fixed station 2-B. Then stations 2-A, 2-B check the frame and the station 2-B in which the FS16 is received already gives up the frame, neglects the request of location address, and a location address information frame is transmitted from the station 2-A when the FS16 is not received.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：允许查询站轻松识别其位置，允许首先接收位置地址查询的固定站将帧接收状态从非接收改变为接收，并将位置地址通知给位置地址查询站。构成：当能够移动1-B的站发送包括FC10：线路电路管理帧的位置地址请求帧时，SA12：其自己的ST1-B地址，VI17：位置地址信息请求和FS16：非接收，该帧首先由固定帧站2-A接收。该站继续接收FS16。然后该帧由固定站2-B接收。然后站2-A，2-B检查帧，接收FS16的站2-B已经放弃该帧，忽略位置地址的请求，并且从站2-B发送位置地址信息帧 A，当FS16没有收到。

10. 发明专利

JPS60132442A SEARCHING SYSTEM FOR ABNORMAL POINT OF NETWORK 失效
公开(公告)号：JPS60132442A
公开(公告)日：1985-07-15
申请号：JP23974683
申请日：1983-12-21
申请人： HITACHI LTD
发明人： NAKAYASHIKI SUSUMU , KASHIO JIROU , YAGIYUU KAZUO , NAKASE HIROMU
IPC分类号： H04L12/437
摘要： PURPOSE:To improve the reliability of a ring-shaped network having a uniform and decentralized structure by making clear a constitution control station when the network has an abnormal. CONSTITUTION:In case an abnormal arrises at a general station ST1, for example and it is impossible for data to make a round along a ring, all general stations ST1 connected to the ring transmit ''Beacon II''. While a constitution control station ST202 transmits ''Beacon I '' and starts a timer for reception of ''Beacon''. When all ST transmit ''Beacon'', the stations ST excepting the downstream one next to the faulty station receive the ''Beacon'' transmitted from other ST at the upstream side. In case the own ST is not equal to the ST202, the received ''Beacon'' is sent to the downstream side. When the own ST is equal to the ST202, the transmission of the received ''Beacon I '' is stopped and the timer is stopped.

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