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1. 发明专利

JPH0738573A TEST SYSTEM FOR ATM EXCHANGE AND ATM NETWORK 失效
公开(公告)号：JPH0738573A
公开(公告)日：1995-02-07
申请号：JP18270693
申请日：1993-07-23
申请人： NIPPON TELEGRAPH & TELEPHONE , NEC CORP , HITACHI LTD , OKI ELECTRIC IND CO LTD , FUJITSU LTD
发明人： TAKAGI KOJI , ITO ARATA , MIYAYASU KENJI , TAKENAKA TOYOFUMI , SUZUKI KOJI , SHIBATA JIRO , SHIMOE TOSHIO , SAKAMOTO HIROYUKI
IPC分类号： H04Q3/00 , H04L12/26 , H04L12/28
摘要： PURPOSE:To improve the reliability and performance of an ATM exchange and an ATM network by efficiently testing active and reserve systems. CONSTITUTION:Concerning the test system for ATM exchange and ATM network composed of that ATM exchange or the like provided with plural function blocks 1-6 made redundant into the active and reserve system so as to transfer cells and plural system crossings 20 and 21 for performing path setting between the respective function blocks, this system is provided with first system crossing control parts 101 and 103 for setting a path between the respective function blocks of the reserve system independently of the path of the active system by controlling the system crossings 20 and 21, and a test circuit 200 for performing the cell conduction test of the reserve system to which path setting is performed based on the control of these first system crossing control parts 101 and 103, and the reserve system is tested while providing service at the active system.

2. 发明专利

JP2000049940A TRAFFIC MEASURING METHOD 失效
公开(公告)号：JP2000049940A
公开(公告)日：2000-02-18
申请号：JP21737798
申请日：1998-07-31
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KASAI KENICHI , ISHIBASHI HIROSATO , TAKAHASHI YOSHITAKA , TAKENAKA TOYOFUMI
IPC分类号： H04M3/36 , H04L12/24 , H04L12/26 , H04M3/00
摘要： PROBLEM TO BE SOLVED: To accurately grasp the loaded condition of an exchange device despite a large number of broadcasting destinations and also to reduce the load on a traffic measuring device by making the exchange device which received the broadcast communication notify the traffic measuring device of the number of broadcasting destinations of the broadcast communication and the message length at an originating time point. SOLUTION: When an information input/output terminal 3-1 transmits a message, the message transmitted from the terminal 3-1 is sent to a communication network 1 and then temporarily stored in an exchange device 2-1. In a broadcast communication mode, the device 2-1 refers to the number of its broadcasting destinations and compares it with the threshold that is previously set. If the number of broadcasting destinations of broadcast communication is larger than the threshold, the device 2-1 immediately notifies a traffic measuring device 4 of the number of broadcasting destinations and the message length. Meanwhile, the device 2-1 temporarily stores the number of broadcasting destinations and the message length when the number of broadcasting destinations is smaller than the threshold.

3. 发明专利

JPS6436179A TRANSFER SYSTEM FOR INTER-FRAME CODING PICTURE INFORMATION 失效
公开(公告)号：JPS6436179A
公开(公告)日：1989-02-07
申请号：JP19119787
申请日：1987-07-30
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TAKAMI KAZUMASA , TAKENAKA TOYOFUMI , AKAIKE TAKESHI , HIROSHIGE MASAAKI
IPC分类号： H04N19/423 , H04N19/46 , H04N19/503 , H04N19/65 , H04N19/70 , H04N19/85
摘要： PURPOSE:To attain the suppression of the frequency of refresh control due to transfer error by selecting a reference frame as a frame ensuring transmittal confirmation without fail so as to avoid waste of transferred information. CONSTITUTION:A reference frame stored it an incoming terminal set is extracted from a memory 22 based on a reference frame number set to a block at the incoming terminal set and picture information is reproduced from the reference frame and difference information. Moreover, a transmittal acknowledge exclusive block set with a reception number field is generated from the transmission frame number of the information transfer block received normally and the result is returned to the outgoing terminal set. The outgoing terminal set discriminates the time sequence between the frame to the reception frame number of the recent transmittal acknowledge block with and the frame stored in the memory 20 before N-period and selects a newer frame in both the frames as the reference frame. Since the reference frame is the frame ensuring transmittal acknowledge without fail, no waste exists in the transferred information and the frequency of occurrence of refresh control due to transfer error is suppressed.

4. 发明专利

JPS6313535A HYBRID MULTIPLEXING SYSTEM 失效
公开(公告)号：JPS6313535A
公开(公告)日：1988-01-20
申请号：JP15596486
申请日：1986-07-04
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TAKENAKA TOYOFUMI
IPC分类号： H04J3/00
摘要： PURPOSE:To effectively utilize a dead capacity by providing a multiplex area variable means varying the time division multiplex area and the packet multiplex area of a signal path. CONSTITUTION:A sending permission is given to the input source of a corresponding address for a time corresponding to a predetermined sending capacity depending on the control information set in a consecutive sending counter table 16 and an address table 17 to an input source applying time division multiplex in a time division multiplex circuit 12 provided to a transmission right control circuit 10. Then a wind circuit 18 in a packet multiplexing circuit 11 disabling the transmission request from a packet multiplexing input source is activated and a selection circuit 19 in the packet multiplexing circuit 11 selects one sending request among plural sending requests and gives a sending permission to a packet multiplexing input source corresponding to the selected sending request. Then hybrid multiplex is applied by repeating the disabled circuit depending on the periodic signal periodically.

5. 发明专利

JPS5797248A SATELLITE SIMULTANEOUS COMMUNICATION SYSTEM 失效
公开(公告)号：JPS5797248A
公开(公告)日：1982-06-16
申请号：JP17274380
申请日：1980-12-08
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TAKENAKA TOYOFUMI , MASE KENICHI
IPC分类号： H04L1/08 , H04B7/15 , H04L1/00 , H04L1/16 , H04L1/18
摘要： PURPOSE:To retransmit data blocks, after retransmission start informing blocks are transmitted, by stopping the continuous transmission of the data blocks from a transmission earth station, when the number of response of normal reception confirmation from a plurality of reception earth stations is less than the predetermined number. CONSTITUTION:When a transmitter 11 recieves a response from a plurality of reception stations via a line 12, the types of response is discriminated at a specific block generation detection section (BGD)22 and the number of responses A for normal reception confirmation is informed to a data block reception success discriminating section (ACT)24. The ACT24 receiving the information compares the number of responses of normal reception confirmation with the number of reception guarantee earth stations, and when the former is less than the latter, the retransmission request is informed to a transmission control section (DTC)15. The DTC15 receiving the information of the retransmission request abolishes the data block of a data block buffer (DBM)19 and requests for retransmission of data block to a terminal via a line 13. The DTC15 requests for transmission of a retransmission start informing block R to a BGD22 and transmits the R via the line 12.

6. 发明专利

JPS61245653A SELECTING SYSTEM FOR TRANSMISSION CIRCUIT OF PACKET EXCHANGE 失效
公开(公告)号：JPS61245653A
公开(公告)日：1986-10-31
申请号：JP8723585
申请日：1985-04-23
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： ASAMURA MITSURU , KURIBAYASHI SHINICHI , TAKENAKA TOYOFUMI
IPC分类号： H04L12/70 , H04L12/741 , H04L12/803
摘要： PURPOSE:To prevent the concentration of load to a specified transmission circuit owing to the traffic variance or circuit fault, by distributing cyclically the detouring traffic supplied from the 1st selection circuit to all transmission circuits within the same course. CONSTITUTION:A circuit selection table CIRT is set by allocating cyclically the circuit numbers within a course. The 1st selection circuit is obtained from the table CIRT by means of CIDX. Then the 2nd selection circuit is selected as follows by means of the table CIRT. That is, the transmission circuit bearing a circuit number obtained by adding the alternative counter value alpha to the CIDX via modulo N is selected. Then 1 is added to an alternative counter alphavia the modulo N. If the selected circuit is already selected, 1 is added again to the counter alpha via the modulo N to obtain a detouring transmission circuit with the same selection logic as the 2nd selection circuit. Thus the detoured packets can be scattered to all circuits within the same course.

7. 发明专利

JPS5793746A SATELLITE SIMULTANEOUS COMMUNICATION SYSTEM 失效
公开(公告)号：JPS5793746A
公开(公告)日：1982-06-10
申请号：JP17069080
申请日：1980-12-03
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： MASE KENICHI , TAKENAKA TOYOFUMI
IPC分类号： H04L1/08 , H04B7/15 , H04L1/16 , H04L1/18
摘要： PURPOSE:To prevent duplicated reception of data block, by abolishing a retransmission block due to misreception of other reception earth station, taking into a chance a retransmission start informing block, at a reception earth station. CONSTITUTION:A transmission earth station transmits the message of the same content to a plurality of reception earth stations (a), (b) continuously at the same time in the unit of data block of a fixed length. Further, the stations (a), (b) detects the presence of transmission error to received data block and returns the results A, N to a transmission earth station. When the transmission earth station receives the response N of misreception, a retransmission start informing block R is transmitted and succeedingly, the data block is retransmitted by retroacting by a fixed number. In the station (a), the blocks from a transmission error block 1 to the block R are abolished. At the same time, in the station (b), blocks from the block R to retransmitted data blocks 1-3 are abolished.

8. 发明专利

JPS5687962A TRANSMISSION*RECEPTION CONTROL SYSTEM FOR DATA FRAME 失效
公开(公告)号：JPS5687962A
公开(公告)日：1981-07-17
申请号：JP16460379
申请日：1979-12-18
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YOSHIDA YUTAKA , SAITOU JIYOUICHI , TAKENAKA TOYOFUMI , WATANABE NAOYA
IPC分类号： H04L29/08 , G06F13/00 , H04J3/16
摘要： PURPOSE:To enable a data frame transmission with an arbitray size, by the combination of a transmission command not added with a frame end display in continuous operation mode with the transmission mode added with the frame end display in noncontinuous operation mode. CONSTITUTION:The data processor 1 and the data frame transmitter 2 are connected with the control line 31 and the data bus 32, and the transmitter 2 is connected to the data line 4. The processor 1 can be set in the command storage area 15 by assuming the reception command of continuous execution mode and the reception command for frame reception state read, as one set. As the transmission command, the transmission command added with a frame end display in the noncontinuous state execution mode is used to set in the storage area 15. Thus, in case that long data and short data are mixed, the long data can be transmitted without examination.

9. 发明专利

JPS5620361A MULTIPLE DATA FRAME TRANSMISSION SYSTEM 失效
公开(公告)号：JPS5620361A
公开(公告)日：1981-02-25
申请号：JP9560579
申请日：1979-07-26
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YOSHIDA YUTAKA , SAITOU JIYOUICHI , TAKENAKA TOYOFUMI , WATANABE NAOYA
IPC分类号： H04L1/00 , H04L7/04 , H04L29/06 , H04L29/08
摘要： PURPOSE:To facilitate control over transmission and reception by using specific patterns for the start pattern of a data frame and then by displaying the kind of the data frame by combining them together. CONSTITUTION:Transmission control function part 6 consists of control part 1, transmitting-receiving buffer 2, character arithmetic part 3, composed of specific pattern generation-detection part 30, ''0'' insertion-removal part 31 and frame check sequence FCS arithmetic check part 32, interface line 4, and data circuit 5. Then, circuit 30 generates and detects pattern F, pattern (f), a resignation pattern, and on- hook pattern. For transparent transmission, circuit 31 inserts ''0'' after every 5th ''1'' when sending data containing not less than five continuous ''1''s and then remove inserted ''0'' in reception. Further, circuit 32 adds FCS to a transmitted data frame and checks FCS of a received data frame to inspect an error.

10. 发明专利

JPS6013628B2 失效
公开(公告)号：JPS6013628B2
公开(公告)日：1985-04-08
申请号：JP9560579
申请日：1979-07-26
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YOSHIDA YUTAKA , SAITO JOICHI , TAKENAKA TOYOFUMI , WATABE NAOYA
IPC分类号： H04L1/00 , H04L7/04 , H04L29/06 , H04L29/08

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