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    • 2. 发明专利
    • FAULT DISCRIMINATING METHOD
    • JPH06350679A
    • 1994-12-22
    • JP13967493
    • 1993-06-11
    • FUJITSU LTD
    • HIYAMA SHINJINAKADE HIROSHITAKEDA SATOSHIKIMOTO AKIHIKO
    • H04L29/14
    • PURPOSE:To provide a fault discriminating method for inter-package interface which prevents erroneous discrimination due to the lag generated in the soft processing or the like for package mounting to correctly discriminate a package fault at the time of no response of a control object package to the control from a control package. CONSTITUTION:In each of control object packages 1 to (n), the output of a CRC check circuit 13 of a command/status processing part 10 in a control and monitor system is inputted to the SET side of the input of an F/F 15, and the output of a power-on reset part 18 is inputted to the RESET side of the input of the F/F 15, and the output of the F/F 15 which is reset to the low level till then by the reset signal of the power-on reset part 18 due to power-on is set to the high level by a signal in the low level sent at the time of normal reception of command data from the control package, thereby sending the mounting information of each of control object packages 1 to (n).
    • 3. 发明专利
    • IN-EQUIPMENT INFORMATION COLLECTION SYSTEM
    • JPH0622002A
    • 1994-01-28
    • JP17399992
    • 1992-07-01
    • FUJITSU LTD
    • NAKADE HIROSHIKAMOI NOBUHISAHIYAMA SHINJI
    • H04L29/14G06F17/40H04Q9/02G06F15/74
    • PURPOSE:To provide the system facilitating the discrimination of a fault and non-mount when a collected section dose not reply with respect to the system collecting the information of each section in the equipment. CONSTITUTION:When a main collection section 1 issues an instruction of information collection to each collected section 2 and the main collection section 1 collects the information of each collected section 2 by allowing each collected section 2 to reply the instruction, a sub collection section 3 grasping the mount state of each collected section 2 is provided with a specific reply generating means 4 and when the collected section 2 is not mounted on the reception of the information collection instruction to the collected section 2, a specific reply representing non-mount of the collected section 2 is returned to the main collection section 1. When the collected section 2 does not reply with the information collection instruction of the main collection section 1 and the main collection section 1 receives a specific reply, the main collection section 1 discriminates non-mount of the collected section 2 and when no specific reply is received, the section 1 discriminates the collected section 2 to be faulty.
    • 5. 发明专利
    • FAST SYNCHRONIZATION CIRCUIT
    • JPS63262939A
    • 1988-10-31
    • JP9773387
    • 1987-04-20
    • FUJITSU LTD
    • MIURA NORIHISATAKEO HIROSHITAKEDA SATOSHINAKADE HIROSHIYAMAZAKI HIROSHI
    • H04J3/06H04J3/00H04L7/08H04L13/10H04L25/40
    • PURPOSE:To secure TSSI(Time Slot Sequence integrity), by providing a cross- connect switch which outputs a parallel signal of (n) bits whose phase is aligned from the input of a parallel signal of (2n-1) bits outputted from a serial-parallel conversion circuit. CONSTITUTION:A frame synchronizing pattern is detected from either plural frame synchronizing pattern detection circuits(300-1-300-n) arranged in parallel is detected, and it is added on the input on one side of a signal switching means 500 as a control signal. Meanwhile, the parallel signal of (2n-1) bits outputted from the serial-parallel conversion circuit 200 is added on the input on the other side of the signal switching means 500. And a switch 5 is switched by the control signal from a frame synchronizing pattern detecting means, and the parallel signal of (n) bits in which a frame synchronizing signal is set at the front and whose phase is aligned is outputted. In such a way, the frame synchronizing signal is set at the front of the parallel output of the cross- connected switch 5, and no mixture of the data of a preceding and a succeeding frames is prevented from occurring, and the TSSI can be secured.
    • 10. 发明专利
    • CRC CHECKING METHOD
    • JPH05160809A
    • 1993-06-25
    • JP31827291
    • 1991-12-03
    • FUJITSU LTD
    • HAYASHI TOSHIAKINAKADE HIROSHIHIYAMA SHINJITAKEDA SATOSHIOBA MASASHI
    • G06F11/10H03M13/09H04L1/00
    • PURPOSE:To obtain a CRC checking method with a small circuit scale and a low cost. CONSTITUTION:A CRC arithmetic operation is implemented by 'N-1' frames based on the result of CRC arithmetic operation of data of each CH in a preceding frame and on the data of the same CH in a succeeding frame at a CRC arithmetic operation means 2 of a transmission side path to obtain a CRC code to be added and the code is written in a CRC code area of the relevant CH of the N-th frame and sent to a cross connect device 1. The CRC arithmetic operation is implemented by 'N' frames based on the half-way result of CRC arithmetic operation of the data of each CH in a received frame and on the data of the same CH in a preceding frame at a CRC arithmetic operation means 3 of a reception side path to obtain the CRC arithmetic operation. A comparison write means 4 reads the CRC arithmetic operation results up to a preceding period from the memory 5, compares the results and writes the result of comparison to the memory 5 so that the result of comparison discordance is left by M periods only when the results are discordant.