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1. 发明专利

JPH10229415A ROUTER USING ATM SWITCH 失效
公开(公告)号：JPH10229415A
公开(公告)日：1998-08-25
申请号：JP3064397
申请日：1997-02-14
申请人： HITACHI LTD
发明人： MIKI KAZUHO , TAKATORI MASAHIRO , TAKASE MASAHIKO , MURAKAMI MASARU , WAKAYAMA KOJI , YOSHIMOTO TETSUO , KUNIMOTO MASAO
IPC分类号： H04Q3/00 , H04L12/28 , H04L12/66 , H04L12/931 , H04L12/935 , H04L12/56
摘要： PROBLEM TO BE SOLVED: To allow the router to have provision for communication of diversified forms by improving multiplexity of communication conducted, via an asynchronous transmission mode(ATM) switch and reducing dispersion in communication delays between multiplexed communication. SOLUTION: This router 5 is provided with an ATM switch 52, an IP control section 53 conducting routing control, a plurality kinds of interface sections 512-517 provided individually to a plurality of transmission line through which diversified communication is conducted, and a cell multiplexer/demultiplexer section 511 to manage identification information of communication of cells between sections. An IP packet sent from an IP node 41 is subject to IP processing by the interface section 512 and converted into cells of a common form. Then the cells are subject to serial multiplex processing at the cell multiplexer/demultiplexer section with cells from other interface sections in the unit of cells and the result is fed to an ATM switch 52. Each interface section and the cell multiplexing/demultiplexing section have a table in which a cross-reference of identification information is registered and set/convert the identification information to a header of an IP packet and cells to be communicated.

2. 发明专利

JP2577746B2 失效
公开(公告)号：JP2577746B2
公开(公告)日：1997-02-05
申请号：JP20811487
申请日：1987-08-24
申请人： HITACHI LTD
发明人： TAKASE MASAHIKO , TAKASAKI YOSHITAKA
IPC分类号： H04L12/52 , H04Q11/04 , H04L12/50

3. 发明专利

JPH0851432A ROUTE SELECTING SYSTEM 失效
公开(公告)号：JPH0851432A
公开(公告)日：1996-02-20
申请号：JP18701194
申请日：1994-08-09
申请人： HITACHI LTD
发明人： SAGARA KAZUHIKO , ENDO NOBORU , TAKASE MASAHIKO
IPC分类号： H04M3/00 , H04L12/28 , H04Q3/00
摘要： PURPOSE:To select a route while considering call traffic characteristics and a call request band in an ATM network by comparing a call request band with a network line band, selecting receivable line and network topology and selecting a route maximizing line capacity from the combination of lines. CONSTITUTION:The number of idle virtual pathes (VP) and virtual channels (VC) are calculated for every virtual path (VP) and whether route selection is possible or not is judged (101). A call request band is removed from line bands on all links to find out remaining bands (102). If negative nodes exist in the remaining bands, a link between the negative nodes is removed to constitute new network topology (103). Then route selection is executed (104). All available routes from a start point up to an end point are selected at first, a link speed is found out by the use of the line bands on a link included in each route and a route having a maximum value out of the found line bands is selected as an optimum route.

4. 发明专利

JPH06303248A LOOPED BUS SYSTEM 失效
公开(公告)号：JPH06303248A
公开(公告)日：1994-10-28
申请号：JP9106593
申请日：1993-04-19
申请人： HITACHI LTD
发明人： YANAGI JUNICHIRO , TAKASE MASAHIKO , TAKAHASHI SETSUO
IPC分类号： H04L12/28 , H04L12/40 , H04L12/42 , H04L12/437 , H04L29/14 , H04Q11/04
摘要： PURPOSE:To provide a looped bus system simple in constitution and capable of facilitating a loop reconstitution at the time of a fault. CONSTITUTION:In the looped bus system where plural nodes 10-1 to 10-n are connected to each other with single direction buses 20a and 20b having signal transmission directions in mutually opposite directions, the head function 30a of one bus and the head function 30b of the other bus are positioned on the different nodes. The bus head function 30a and the other bus terminal function 31b are positioned on the same node. The head function 30b of the bus and the terminal function 31a of the other bus are positioned on the same bus. At normal time, a bus part in an unused state exists at a part of the looped bus and the reconstruction of the bus and the addition of the node can freely be executed by using the part.

5. 发明专利

JPH06104917A CONGESTION CONTROL METHOD AND CALL RECEPTION CONTROL METHOD 失效
公开(公告)号：JPH06104917A
公开(公告)日：1994-04-15
申请号：JP24918692
申请日：1992-09-18
申请人： HITACHI LTD
发明人： OUCHI TOSHIYA , TANABE SHIRO , TAKASE MASAHIKO , ENDO NOBORU
IPC分类号： H04L12/28 , H04L12/873 , H04L12/877 , H04L12/911 , H04L12/48 , H04L12/56
摘要： PURPOSE:To obtain the congestion control method with less deterioration in communication quality due to a cell with low priority in which congestion is quickly recovered in a packet communication network. CONSTITUTION:A congestion control circuit 9 measures a missing rate of cells for each of queues 12-1-12-n provided corresponding to quality class/output line and allocates momentarily a standby band to a queue whose missing rate exceeds an allowable cell missing rate depending on the quality class in advance. Furthermore, when a cell missing rate is larger than a requested rate and very smaller than the request value, the congestion control circuit 9 informs it to a call reception control section 11 that the missing rate is not optimized and optimizes the operating band of each queue so that the cell missing rate is optimized by the control section 11.

6. 发明专利

JPH0685915A NETWORK CONTROL SYSTEM 失效
公开(公告)号：JPH0685915A
公开(公告)日：1994-03-25
申请号：JP23562692
申请日：1992-09-03
申请人： HITACHI LTD
发明人： TANABE SHIRO , TAKASE MASAHIKO
IPC分类号： H04M3/42 , H04L12/28 , H04M3/00 , H04Q3/545 , H04W8/26 , H04W48/20 , H04W68/00 , H04W84/12 , H04Q7/04
摘要： PURPOSE:To provide the network control system in which the personal number service is realized without concentrating loads and data bases onto a host service control point of a network. CONSTITUTION:In the network where plural nodes 10A-10D accommodating terminal equipments, the caller node 10A multi-casts number information received from a terminal equipment Ta to plural other nodes (10B, 10C, 10D) and only the node 10B accommodating a terminal equipment Tb-j of number information replies the caller node to set up a call between a caller and a called node as the network control system. Thus, the more the area for multi- casting number information is increased, the less the processing capability of the service control point, the file capacity is reduced and when the area reaches a national area, no SCP is required (complete distribution system).

7. 发明专利

JPH05336147A 失效
公开(公告)号：JPH05336147A
公开(公告)日：1993-12-17
申请号：JP14453292
申请日：1992-06-04
申请人： NIPPON TELEGRAPH & TELEPHONE , FUJITSU LTD , HITACHI LTD
发明人： YAMANAKA NAOAKI , SATO YOICHI , SATO KENICHI , IGUCHI KAZUO , TAKEO HIROSHI , KUSAYANAGI MICHIO , OGURA TAKAO , TAKASE MASAHIKO , SHINADA SHIGEO , TAKANO MITSUHIRO , SAITO KIYOSHI , HOBARA KAZUHIKO , OKABE TETSUHIRO
IPC分类号： H04L12/28 , H04L12/48
摘要： PURPOSE:To obtain the high accuracy not causing a problem practically onto the management of an asynchronous communication network with small hardware configuration by executing repetitively traffic monitor for each T cell time and another T cell time whose phase is deviated by a T/2 cell time. CONSTITUTION:A counter circuit 4-1 is a circuit discriminating it that number of cells arrived within a T cell time starting from a time t0 exceeds X. A counter circuit 4-2 is a circuit discriminating it that number of cells arrived within a T cell time starting from a time [t0+T/2] exceeds X. A control circuit 2 applies a reset signal R to the counter circuits 4-1, 4-2 to reset the count for each T cell time and whose phase is deviated by a T/2 cell time alternately. When the count of the two counter circuits 4-1, 4-2 exceeds the value X, the control circuit 6 sends a discrimination output to a terminal 7.

8. 发明专利

JPH0574048B2 失效
公开(公告)号：JPH0574048B2
公开(公告)日：1993-10-15
申请号：JP6186584
申请日：1984-03-29
申请人： HITACHI LTD
发明人： IMOTO KATSUYUKI , TAKASE MASAHIKO , AOKI SATOSHI , YOSHA TSUTOMU , YAMADA YOSHIHARU
IPC分类号： H04B10/00 , G02B6/28 , G02B6/293 , G02B6/34

9. 发明专利

JPH04123544A PRIORITY CONTROL METHOD FOR MEDIUM ACCESS 失效
公开(公告)号：JPH04123544A
公开(公告)日：1992-04-23
申请号：JP24242390
申请日：1990-09-14
申请人： HITACHI LTD , HITACHI COMMUNICATION SYSTEM
发明人： YANAGI JUNICHIRO , TAKASE MASAHIKO , SHIMIZU KAZUHIRO , KATO YUICHI
IPC分类号： H04L12/40
摘要： PURPOSE:To attain priority control whose number of priority is made variable by connecting access controllers each having a single class through the use of a simple addition circuit. CONSTITUTION:Access controllers 10-1-4 connect to buses A100, B1O1 and the access controllers 10-1-4 corresponding to higher priority are connected toward upperstream of the buses. Moreover, the access controllers 10-1-4 have data inputs 106-1-4, 107-1-4 to receive a data sent from a terminal equipment to the buses. In order to apply priority control, the access controllers 10-1-4 have control input/output 200-1-4, 201-1-4 with respect to the buses A100, B101 and the control output connects to the control input of the access controllers 10-1-4 and control inputs 201-1, 202-1 of the access controllers 10-1 being the highest order controller are connected to ground. Thus, the priority control employing plural access controllers is attained.

10. 发明专利

JPH0413328A ACCESS CONTENTION CONTROL METHOD 失效
公开(公告)号：JPH0413328A
公开(公告)日：1992-01-17
申请号：JP11575390
申请日：1990-05-07
申请人： HITACHI LTD
发明人： TAKASE MASAHIKO , YANAGI JUNICHIRO , TAKASAKI YOSHITAKA
IPC分类号： H04L12/40
摘要： PURPOSE:To realize versatility of an adaptive transmission band between terminal equipments by adding information representing an information transfer request after a prescribed time to a header of an ATM cell, sending the resulting cell and sending information in an information buffer to a selector when the information of transfer request does not collide with the information transfer request of other terminal equipment. CONSTITUTION:When transmission information exists in an information buffer 41, a transfer request transmission circuit 421 sends a transfer request. A selector 43 sends a transfer request so as to be synchronously with a header of a prescribed cell. An optical reception circuit 46 receives an optical signal from a loopback signal fiber 25 and converts it into an electric signal. As soon as an optical reception level detection circuit 47 detects presence of transfer request collision in a cell header based on an electric signal level, the circuit 47 detects a cell phase. When no collision takes place, the information detection circuit 42 sends the information in the information buffer 41 to the selector 43, which sends the information to an optical transmission timing adjustment circuit 44 synchronously with a slot of the ATM cell.

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