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1. 发明授权

US11323417B2 Network management apparatus, network management method, and non-transitory computer-readable storage medium 有权
公开(公告)号：US11323417B2
公开(公告)日：2022-05-03
申请号：US16286732
申请日：2019-02-27
申请人： FUJITSU LIMITED
发明人： Takuma Utsunomiya , Naoki Oguchi
IPC分类号： H04L61/2503 , H04L29/06
摘要： A network management apparatus configured to obtain multiple rules that each control communication in accordance with an address range of a packet, divide a full set of the address range of the multiple rules into multiple subsets that are mutually disjoint in accordance with inclusion relations of the address range among the multiple rules, extract, with respect to each rule of the multiple rules, one or more subsets that are included in the address range from the multiple subsets, and determine, with respect to each rule of the multiple rules, an inclusion relation of the one or more subsets between a particular rule and another rule of the multiple rules that is assigned higher priority than that of the particular rule and determine disposition for each of the multiple rules in accordance with a determination result of the inclusion relation of the one or more subsets.

2. 发明授权

US10693744B2 Network property verification 有权
公开(公告)号：US10693744B2
公开(公告)日：2020-06-23
申请号：US15802412
申请日：2017-11-02
申请人： FUJITSU LIMITED
发明人： Alexander Horn , Mukul R. Prasad , Naoki Oguchi , Paparao Palacharla
IPC分类号： H04L12/24 , H04L29/06 , H04L12/26
摘要： A method may include obtaining packet handling rules from at least one firewall in a network and at least one routing table in the network, and translating the packet handling rules to canonical data structures based on priority of rules at a given routing table or a given firewall. Each canonical data structure may represent a subset of packets affected by one or more corresponding packet handling rules such that each packet handling rule is covered by at least one canonical data structure. The method may also include generating a graph representation of the firewalls and the nodes corresponding to the routing tables in the network. The method may additionally include labeling vertices and edges in the graph representation based on the packet handling rules. The method may also include, using the graph representation, verifying one or more network properties to identify any network issues.

3. 发明授权

US10469352B2 Method and apparatus for available bandwidth measurement 有权
公开(公告)号：US10469352B2
公开(公告)日：2019-11-05
申请号：US15654761
申请日：2017-07-20
申请人： FUJITSU LIMITED
发明人： Chunghan Lee , Naoki Oguchi
IPC分类号： H04L12/26 , G06F9/455 , H04L12/24 , H04L12/915 , H04L12/801
摘要： An available bandwidth measuring apparatus classifies, into one group, a plurality of virtual machines communicating with a physical node. Then, the available bandwidth measuring apparatus obtains available bandwidth measurements with respect to the virtual machines belonging to the same group by transmitting, to the physical node, measuring packets emulating each of the virtual machines. The available bandwidth measurements represent available bandwidth available when each of the virtual machines performs data transmission in a different time slot. Based on the available bandwidth measurements, the available bandwidth measuring apparatus determines actual available bandwidth of each of the virtual machines, to be used when the virtual machines perform data transmission to the physical node in the same time slot, and notifies each of the virtual machines of the actual available bandwidth determined for the virtual machine.

4. 发明申请

US20140082180A1 INFORMATION PROCESSOR APPARATUS, INFORMATION PROCESSING METHOD, AND RECORDING MEDIUM 审中-公开
标题翻译：信息处理器装置，信息处理方法和记录介质
公开(公告)号：US20140082180A1
公开(公告)日：2014-03-20
申请号：US13904730
申请日：2013-05-29
申请人： FUJITSU LIMITED
发明人： Ryoichi MUTOH , Naoki Oguchi
IPC分类号： H04L12/26
CPC分类号： H04L47/193 , H04L47/40
摘要： An information processor apparatus includes a memory which stores a program, and a processor, based on the program, configured to, detect a packet that is transmitted from a management device to a second node that is included in a second network, and that triggers a request packet transmitted from the second node to a first node that is included in a first network, by monitoring communication from the management device that manages the first node and the second node that obtains data from the first node through a third network, and execute a proxy request by transmitting the request packet to the first node when the packet is detected and a connection is made with the first network.
摘要翻译：一种信息处理装置，包括存储程序的存储器和基于该程序的处理器，被配置为检测从管理装置发送到包含在第二网络中的第二节点的分组，并触发一个通过监视来自管理通过第三网络从第一节点获得数据的第一节点和第二节点的管理装置的通信，执行从第二节点发送到第一节点的第一节点的请求分组，当检测到分组并且与第一网络进行连接时，通过将请求分组发送到第一节点来进行代理请求。

5. 发明授权

US09450867B2 Apparatus and method for controlling transmission between relay devices 有权
标题翻译：用于控制中继设备之间传输的装置和方法
公开(公告)号：US09450867B2
公开(公告)日：2016-09-20
申请号：US14309718
申请日：2014-06-19
申请人： FUJITSU LIMITED
发明人： Naoki Oguchi
IPC分类号： H04L1/00 , H04L12/721 , H04L29/06
CPC分类号： H04L45/72 , H04L63/00 , H04L63/0272 , H04L63/166 , H04L67/28 , H04L69/16 , H04L69/169
摘要： A relay device is arranged on a path of a Transmission Control Protocol (TCP) packet transmitted and received between a transmission-side end device and a reception-side end device. The relay device stores packet information obtained by snooping on a first TCP packet that is addressed to the reception-side end device and received from the transmission-side end device and on a second TCP packet that is addressed to the transmission-side end device and received from another relay device that is arranged between the relay device and the reception-side end device on the path. The relay device performs, based on the packet information, first communication control between the relay device and the another relay device, where the first communication control is independent of second communication control that is performed between the transmission-side end device and the reception-side end device.
摘要翻译：中继设备被布置在传输控制协议（TCP）分组的路径上，该传输控制协议（TCP）分组在发送侧终端设备和接收侧终端设备之间发送和接收。中继装置将通过窥探获得的分组信息存储在寻址到接收侧终端装置并从发送侧终端装置接收到的第一TCP分组以及寻址到发送侧终端装置的第二TCP分组上，从设置在路径上的中继装置与接收侧终端装置之间的另一中继装置接收。中继装置基于分组信息，执行中继装置与另一中继装置之间的第一通信控制，其中第一通信控制与在发送侧终端装置与接收侧之间执行的第二通信控制无关终端设备。

6. 发明授权

US08976671B2 Information processing apparatus, congestion control method, and computer-readable recording medium 有权
标题翻译：信息处理装置，拥塞控制方法和计算机可读记录介质
公开(公告)号：US08976671B2
公开(公告)日：2015-03-10
申请号：US13717121
申请日：2012-12-17
申请人： Fujitsu Limited
发明人： Ryoichi Mutoh , Naoki Oguchi
IPC分类号： H04L12/26 , H04L12/807
CPC分类号： H04L47/27 , H04L43/00
摘要： A TCP node stores a congestion window size before congestion is detected, the congestion window size limiting the amount of data to be transmitted. If congestion is detected, the TCP node reduces a current congestion window size to a predetermined size. If path switching subsequently occurs after congestion is detected, the TCP node uses a round-trip time or bandwidth information of a path after switching to correct the congestion window size before congestion detection. The TCP node then changes the reduced congestion window size to the corrected size.
摘要翻译： TCP节点在检测到拥塞之前存储拥塞窗口大小，拥塞窗口大小限制要发送的数据量。如果检测到拥塞，则TCP节点将当前拥塞窗口大小减小到预定大小。如果在检测到拥塞之后发生路径切换，则TCP节点在切换之前使用往返时间或路径的带宽信息，以在拥塞检测之前校正拥塞窗口大小。然后，TCP节点将减少的拥塞窗口大小改变为校正的大小。

7. 发明授权

US08953484B2 Communication device and communication method 有权
标题翻译：通信设备和通信方式
公开(公告)号：US08953484B2
公开(公告)日：2015-02-10
申请号：US13720515
申请日：2012-12-19
申请人： Fujitsu Limited
发明人： Naoki Oguchi
IPC分类号： H04L12/26 , H04W24/02 , H04L1/18
CPC分类号： H04W24/02 , H04L1/0009 , H04L1/0015 , H04L1/18 , H04L1/1867
摘要： A communication device including: a processor configured to perform a wireless communication protocol including an upper layer and a lower layer, wherein the processor is configured to estimate, based on a round trip time measured at the upper layer in case of carrying out a retransmission control at the lower layer and a time taking for retransmissions at the lower layer, a first estimated round trip time, to estimate, based on the number of times of packet loss at the upper layer in case of carrying out the retransmission control at the lower layer, and the number of times of successful transmission at the upper layer being recovered by the retransmission control, a first estimated packet loss rate, and to obtain, based on the first estimated round trip time and the first estimated packet loss rate, a first estimated throughput in case of not carrying out the retransmission control.
摘要翻译：一种通信设备，包括：处理器，被配置为执行包括上层和下层的无线通信协议，其中所述处理器被配置为基于在执行重传控制的情况下在所述上层测量的往返时间估计在下层进行重传，在下层进行重传的时间，第一估计往返时间，基于在下层进行重发控制的情况下的上层分组丢失次数来估计，并且通过重传控制恢复在上层的成功发送次数，第一估计分组丢失率，并且基于第一估计往返时间和第一估计分组丢失率，获得第一估计分组丢失率在不执行重传控制的情况下的吞吐量。

8. 发明申请

US20140169164A1 COMMUNICATION DEVICE, COMMUNICATION METHOD, AND RECORDING MEDIUM 有权
标题翻译：通信设备，通信方法和记录介质
公开(公告)号：US20140169164A1
公开(公告)日：2014-06-19
申请号：US14023805
申请日：2013-09-11
申请人： FUJITSU LIMITED
发明人： Naoki Oguchi
IPC分类号： H04L12/801
CPC分类号： H04L47/193 , H04L47/27 , H04L47/283 , H04L47/365
摘要： A communication device includes a memory configured to store a program, and a processor, based on the program, configured to control a number of communication segments that are allowed to be continuously transmitted after a first communication segment to be transmitted in accordance with a number of acknowledgments that have been received, and set a communication segment length of the first communication segment based on a length of time before completion of reception of an acknowledgment for a transmitted second communication segment.
摘要翻译：一种通信装置，包括被配置为存储程序的存储器和基于该程序的处理器，该处理器被配置为根据多个处理器来控制在要发送的第一通信段之后允许连续发送的通信段的数量已经接收到的确认，并且基于在发送的第二通信段的确认的接收完成之前的时间长度来设置第一通信段的通信段长度。

9. 发明授权

US11188444B2 Abnormality detection method and abnormality detection device 有权
公开(公告)号：US11188444B2
公开(公告)日：2021-11-30
申请号：US16793016
申请日：2020-02-18
申请人： FUJITSU LIMITED
发明人： Naoki Oguchi
IPC分类号： G06F11/00 , G06F11/34 , G06F11/32 , G06F16/17 , G06F11/07 , G06F16/22 , G06F11/30
摘要： A non-transitory computer-readable recording medium stores therein a program that causes a computer to execute a process, the process comprising: acquiring update information of forwarding tables and event logs for respective relay devices at predetermined intervals; performing consistency determination of determining consistency of the forwarding tables when update completion of the forwarding tables have been confirmed for all of the relay devices; when a first relay device is determined to have a problem in consistency, associating the problem with an event log, among the event logs of the first relay device, corresponding to a time when update information of a first forwarding table of the first relay device is acquired; and outputting information including the first relay device and the event log associated with the problem.

10. 发明授权

US09847920B2 Communication control device, communication control method, and computer readable storage medium for specifying an upper limit of a network connection 有权
公开(公告)号：US09847920B2
公开(公告)日：2017-12-19
申请号：US15435486
申请日：2017-02-17
申请人： FUJITSU LIMITED
发明人： Yosuke Takano , Naoki Oguchi , Ryoichi Mutoh
IPC分类号： H04L12/26 , H04L12/825 , H04L12/863
CPC分类号： H04L43/04 , H04L43/0829 , H04L47/25 , H04L47/54
摘要： A communication control device including: a memory, and a processor coupled to the memory and the processor configured to: transmit packets from the communication control device to a network device at each of a plurality of transmission rates, acquire a plurality of index values respectively indicating amounts of packet loss at the plurality of transmission rates, specify, among the plurality of transmission rates, a first transmission rate on which a corresponding index value among the plurality of index values has a dependence, and specify an upper limit of a vacant band between the communication control device and the network device based on the first transmission rate.

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