专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

61. 发明专利

JPH11355281A MOBILE COMMUNICATION SYSTEM, MOBILE TERMINAL, PACKET GATEWAY AND IP PACKET ROUTING METHOD 失效
公开(公告)号：JPH11355281A
公开(公告)日：1999-12-24
申请号：JP15585798
申请日：1998-06-04
申请人： HITACHI LTD
发明人： MIZUTANI MIKA , MATSUI SUSUMU , OUCHI TOSHIYA , SHIBATA JIRO , HIRAYAMA KOJI , SHIRAI KEISUKE
IPC分类号： H04L12/66 , H04L12/701 , H04L29/06 , H04W8/26 , H04W28/00 , H04W40/20 , H04W40/24 , H04W40/28 , H04W40/32 , H04W40/34 , H04W40/36 , H04W80/04 , H04W84/12 , H04W92/02 , H04L12/28 , H04L12/56 , H04Q7/38
摘要： PROBLEM TO BE SOLVED: To realize IP packet transfer through an efficient route within a system in a mobile communication system connected to an IP network. SOLUTION: A mobile communication system 101 and the internet 109 are connected by plural packet gateways(PGW) 108a and 108b to constitute IP sub-networks 100a and 100b corresponding to the PGWs. In-zone location registers(VLR) 107a and 107b report the position information of mobile terminals (MS) 102a to 102c and the IP addresses of data terminals connected to the MSs to the PGWs and if the IP address reported to the PGW belongs to another IP sub-network, the PGW informs the PGW corresponding to another IP sub- network that the PGW itself is the transfer destination. The PGW manages the position information of the MS to which the data terminals are connected based on the reported contents and performs packet routing based on the management contents.

62. 发明专利

JPH07115469A VOICE COMMUNICATION SYSTEM 失效
公开(公告)号：JPH07115469A
公开(公告)日：1995-05-02
申请号：JP25959093
申请日：1993-10-18
申请人： HITACHI LTD
发明人： TAKAHARA KEIKO , IWAMI NAOKO , HOSHI TORU , MATSUI SUSUMU
IPC分类号： H04M3/42
摘要： PURPOSE:To recognize a transmission opponent by a reception side and to recognize a reason for no response of a speech opponent by a transmission side by integrating the communication channel of a data system and that of a voice system with a LAN, and displaying the name and address of the transmission side and the speech refusal reason of the reception side, etc. CONSTITUTION:When a transmitter clicks a transmission button by selecting a communication opponent, a 'screen in calling' is displayed on the reception side, and the name, department, and address of the transmitter are displayed on a field 601. A receiver can hold speech with the transmitter by clicking a reception button 1602 replying to the call of the transmitter. When the receiver desires to refuse the call, the name of the opponent is displayed on the field 1701 of a display screen at the transmission side by clicking refusal reason informing buttons 1603-1605, and also. the speech refusal reason is displayed. Therefore, the case to interrupt a job can be reduced, which improves convenience.

63. 发明专利

JPH05207544A COMMUNICATION SYSTEM IN RADIO PORTABLE TERMINAL EQUIPMENT SYSTEM 失效
公开(公告)号：JPH05207544A
公开(公告)日：1993-08-13
申请号：JP1475092
申请日：1992-01-30
申请人： HITACHI LTD
发明人： MATSUI SUSUMU , TAKAHASHI YASUHIRO , YANO TADASHI , HOSHI TORU
IPC分类号： H04Q7/38 , H04B7/26 , H04Q7/24 , H04Q7/26 , H04Q7/30
摘要： PURPOSE:To allow the user to select an available communication class by judging the availability of voice communication and of data communication based on measured communication quality and judging a possible highest modulation demodulation speed when the data communication is available. CONSTITUTION:A reception circuit 104 sends a signal level to a communication quality judging circuit 106, which judges the communication quality from electric field strength information and numerizes the quality as, e.g. 10-step evaluation and stores the result to an internal register in a form decoded by a CPU 116. The relation between the electric field strength and the communication quality is registered in advance in the circuit 106. Upon the request of the user, the CPU 116 reads a value of the register in the circuit 106 and displays the availability of data communication, that of voice communication and a maximum data communication speed when the data communication is available onto a display device 120 according to the value. The communication quality expressed in the 10-step evaluation is stored in a memory 117 as data after an evaluation experiment is implemented. The CPU 116 references the data and makes evaluation. The user receives the data to implement the communication.

64. 发明专利

JPH03273350A HIGH-SPEED PROTOCOL PROCESSOR 失效
公开(公告)号：JPH03273350A
公开(公告)日：1991-12-04
申请号：JP31149490
申请日：1990-11-19
申请人： HITACHI LTD
发明人： YOKOYAMA TATSUYA , HIRATA TETSUHIKO , MIZUTANI MIKA , MATSUI SUSUMU , TERADA MATSUAKI
IPC分类号： G06F13/00 , H04L29/06
摘要： PURPOSE:To accerate data transfer by executing a protocol processing by a processor part, which is formed to an exclusive hardware, in the case of a normal data transfer processing and executing the other processing by a proces sor part under the control of a software. CONSTITUTION:The data transmitted from a computer 1 and the data received from a network 3 are stored through a data path 21 of the protocol processor (communication control unit) 2 to a buffer memory 30. The primitives such as a transmission request from the computer 1 to a high-speed processing mecha nism 10 and a reception announcement or the like from a MAC control proces sor 50 are exchanged through a primitive path 22. When the primitive is re ceived from the path 22, the processing mechanism 10 performs access through the path 23 to protocol control information on the memory 30 and executes the protocol processing. In such a way, the processor 2 forms a 3-port memory so as to simultaneously execute three processings as mentioned above. Then, the processing mechanism 10 executes a processing concerning the prescribed layer of the hierarchized protocol.

65. 发明专利

JPH02131073A HIGH SPEED STILL PICTURE TRANSFER SYSTEM 失效
公开(公告)号：JPH02131073A
公开(公告)日：1990-05-18
申请号：JP28360088
申请日：1988-11-11
申请人： HITACHI LTD
发明人： HIRATA TETSUHIKO , MIZUTANI MIKA , MATSUI SUSUMU , TERADA MATSUAKI
IPC分类号： H04N1/00 , G06F17/30 , G06T1/00 , H04N1/21
摘要： PURPOSE:To quicken a response to the retrieval request of a user by processing data transfer by a LAN and a data readout from an optical disk in parallel. CONSTITUTION:When a request comes from a retrieval station 7, a file station 7 reads a compression picture data from an optical disk 6 to a control memory 18a. Then a data for LAN transfer is transferred from the control memory 18a of a picture control section to the main instruction 13a of a general-purpose work station section. The readout instruction of the optical disk is not implemented sequentially at every page from the picture control section slave processor 19b of the retrieval station and the slave processor 19a of the file station applies the management. Thus, the readout of the optical disk, the data transfer by the LAN and the data expansion display are processed in parallel to shorten the display time.

66. 发明专利

JPH01256248A HIERARCHICAL PROTOCOL PARALLEL PROCESSOR 失效
公开(公告)号：JPH01256248A
公开(公告)日：1989-10-12
申请号：JP8293588
申请日：1988-04-06
申请人： HITACHI LTD
发明人： MATSUI SUSUMU , YOKOYAMA TATSUYA
IPC分类号： H04L29/02 , H04L13/00
摘要： PURPOSE:To speed up parallel processing of a hierarchical protocol by devising the unit so that plural protocol processings are implemented in parallel through hierarchical protocol configuration. CONSTITUTION:The protocol processing for each communication layer can be implemented with the presence of address information for connection recognition, service request information and protocol header information in a frame. Then a control section 6 gives information simultaneously to a protocol processing section for each communication hierarchical layer processing sections 8A-8C to apply the parallel operation of each protocol processing. Since one protocol processing in hierarch is regarded as 'automatic action', the state is stored before the protocols processing start in each hierarch and the state is restored when any interruption is required after the start of processing so as to avoid malfunction. Thus, the processing of plural hierarchical communication protocol is accelerated.

67. 发明专利

JPH01122230A DATA TRANSMISSION SYSTEM FOR NETWORK SYSTEM 失效
公开(公告)号：JPH01122230A
公开(公告)日：1989-05-15
申请号：JP27919687
申请日：1987-11-06
申请人： HITACHI LTD
发明人： HIROZAWA MAKOTO , MATSUI SUSUMU , YAGYU KAZUO , FUKUZAWA JUNJI
IPC分类号： H04L12/46
摘要： PURPOSE:To effectively distribute a load in multistage bridges by relaying frames, which meet relay conditions stored in a bridge itself, out of reception frames from one LAN to another. CONSTITUTION:Information indicating relay conditions of frames 11-14 to be transmitted from one LAN to the other are preliminarily stored in bridges 3 and 4, and each bridge relays only frames, which meet the relay condition stored in the bridge itself, out of reception frames from one LAN to the other. Thus, it is unnecessary for each station which transmits frames to pay attention to bridges which should relay frames, and the CPU time for bridge selection and the change of an already set frame format due to bridge designation are unnecessary. Further, it is unnecessary for the station to pay attention to entrance and secession of bridges.

68. 发明专利

JP2002354045A GATEWAY DEVICE 失效
公开(公告)号：JP2002354045A
公开(公告)日：2002-12-06
申请号：JP2001158106
申请日：2001-05-28
申请人： HITACHI LTD
发明人： NODA MITSUHIRO , MATSUI SUSUMU , HONDA AKINORI
IPC分类号： H04L12/66
摘要： PROBLEM TO BE SOLVED: To provide a gateway device which enables reduction of network bands between web servers for making a web access faster. SOLUTION: A gateway device connects the first and second networks in the network which has a construction that the first network to which user terminals are connected is connected to any of the third networks having information terminals by way of the second network. A cash terminal is connected to the gateway device so that it has a determination method to determine packet command contents sent to an information provision terminal from a user terminal. It also has a method to send the data stored in the cash terminal to a user terminal if data required by a packet is in the cash terminal, but if not, a connection to an information provision terminal from the gateway device is established within the second network, and it has a transferring method for transferring the information contained in packets from a user terminal through the connection, and another method for sending data obtained from an information provision terminal to the cash terminal.

69. 发明专利

JPH11187010A METHOD AND SYSTEM FOR DELIVERING KEY IN CRYPTOGRAPHIC COMMUNICATION 失效
公开(公告)号：JPH11187010A
公开(公告)日：1999-07-09
申请号：JP34931397
申请日：1997-12-18
申请人： HITACHI LTD
发明人： NISHIOKA GENJI , YAMAZAKI MASANORI , MATSUI SUSUMU
IPC分类号： H04L9/08 , G09C1/00
摘要： PROBLEM TO BE SOLVED: To provide a key delivering method which is effective for conspiracy attack while shortening the length of key delivery data for sharing a key even when there are many recipients. SOLUTION: Equipment 100 on the side of a key preparing person prepares a finite set S composed of the secret information of the key preparing person and a finite set P composed of disclosed information. A step is provided for preparing and delivering key information Kx of an entry (x) corresponding to a partial set Sx in the finite set S. Equipment 200 on the entity side of a transmitter prepares a finite set W from the element and random number of the finite set P and transmits this set to the equipment 200 on the entity side of a recipient as transmission data. The equipment on the entity side of the recipient (x) extracts a partial set Wx of the relevant set W corresponding to a set predetermined by the key preparing person from the finite set W, calculates a peculiar value Ix of the recipient from each element and calculates a common key K with the transmitter based on this peculiar value Ix and key information Kx.

70. 发明专利

JPH10164644A MOBILE RADIO COMMUNICATION SYSTEM 失效
公开(公告)号：JPH10164644A
公开(公告)日：1998-06-19
申请号：JP31590696
申请日：1996-11-27
申请人： HITACHI LTD
发明人： HAYASHI MASATO , MATSUMOTO NORINAO , MATSUI SUSUMU , TANAKA KAZUHISA
IPC分类号： H04M3/42 , H04Q3/58 , H04W36/14 , H04W48/18 , H04W60/06 , H04W84/10 , H04Q7/34 , H04Q7/38
摘要： PROBLEM TO BE SOLVED: To let a source office PBX surely recognize the move of a mobile terminal, to grasp whether the mobile terminal turns off its power source or leaves outdoors and to reduce the possibility of non-coincidence between position information managed by the PBX at the time of outdoor movement and the real position of mobile terminal by immediately reporting that the mobile terminal leaves the office to the moving source office as leaving announcement. SOLUTION: Concerning an office mobile radio communication system, when a mobile terminal 14 moves 21 outdoors, a terminal radio communication mode is turned to a public mode, a position register request 20a is outputted to a public mobile terminal 1 and corresponding to this request, the mobile network 1 transmits a certificate request 20b. The mobile terminal 1 receiving a certificate response 20c from the terminal 14 compares the certified result of terminal 14 with the result calculated by the mobile terminal 1 and when they are coincident, a position register accept 20d is transmitted to the terminal 14 as certificate OK 22. Besides, a leave announcement 20e is transmitted to a PBX 10 in the moving source office.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式