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公开(公告)号：US09900240B2
公开(公告)日：2018-02-20
申请号：US14632501
申请日：2015-02-26
申请人： FUJITSU LIMITED
发明人： Taiji Kondo , Hiroshi Towata , Eizou Ishizu
IPC分类号： H04L12/721 , H04L12/751 , H04L12/851 , H04W28/02
CPC分类号： H04L45/123 , H04L45/026 , H04L45/124
摘要： A node apparatus calculates the arrival rate in a link, discretizes the calculated arrival rate according to thresholds that are set so that the intervals between thresholds in the range in which a large number of the arrival rates in the links with a high frequency of usage exist become narrower, and calculates the link cost according to the value after the discretization. The node apparatus then obtains, from adjacent node apparatuses, the route cost for each route to each final destination that may be reached, and integrates the obtained route cost by the calculated link cost to calculate the route cost to each final destination that can be reached from the local node apparatus via the adjacent node apparatus. The node apparatus then selects the adjacent node apparatus to be the transmission destination according to the route cost of the route to the final destination of a data frame.
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公开(公告)号：US20180062696A1
公开(公告)日：2018-03-01
申请号：US15648115
申请日：2017-07-12
申请人： FUJITSU LIMITED
发明人： TOSHIO KAWASAKI , Nobuhisa Aoki , TORU MANIWA , Tadahiro Sato , Yusuke Tobisu , Hiroshi Towata
CPC分类号： H04B1/525 , H04B1/0475 , H04B1/50 , H04L5/143 , H04L5/1461 , H04L27/2601
摘要： A passive intermodulation (PIM) canceller of a communication device includes a combining unit, a replica generating unit, and a delay measuring instrument. The replica generating unit generates an intermodulation signal based on the amount of delay of each transmission signal. The combining unit cancels out the intermodulation signal from the reception signal using the generated intermodulation signal. The delay measuring instrument delays a transmission signal x2 included in a plurality of transmission signals by different first amounts of delay. The delay measuring instrument generates an intermediate signal Sm1 by multiplying the delayed transmission signal x2 to the reception signal. The delay measuring instrument calculates, based on the correlation values of the intermediate signal Sm1 corresponding to each first amount of delay and a transmission signal x1 included in the plurality of transmission signals, the amount of delay of the transmission signal x1 with respect to the intermodulation signal.
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公开(公告)号：US20170207862A1
公开(公告)日：2017-07-20
申请号：US15401476
申请日：2017-01-09
申请人： FUJITSU LIMITED
发明人： Nobuhisa Aoki , TOSHIO KAWASAKI , TORU MANIWA , Tadahiro Sato , Yusuke Tobisu , Hiroshi Towata
摘要： A distortion cancellation device includes a first acquiring unit that acquires a plurality of transmission signals that are wirelessly transmitted at different frequencies; a second acquiring unit that acquires a reception signal to which an intermodulation signal generated due to the plurality of the transmission signals is added; and a processor that executes a process including acquiring a gain difference between the plurality of the transmission signals generated when the plurality of the transmission signals acquired by the first acquiring unit is sent to a generation source of the intermodulation signal, generating, by an arithmetic expression using both the acquired gain difference and the plurality of the transmission signals, a cancellation signal associated with the intermodulation signal, and combining the generated cancellation signal with the reception signal acquired by the second acquiring unit.
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公开(公告)号：US20150271053A1
公开(公告)日：2015-09-24
申请号：US14632501
申请日：2015-02-26
申请人： FUJITSU LIMITED
发明人： Taiji Kondo , Hiroshi Towata , Eizou ISHIZU
IPC分类号： H04L12/721 , H04L12/851 , H04W28/02 , H04L12/751
CPC分类号： H04L45/123 , H04L45/026 , H04L45/124
摘要： A node apparatus calculates the arrival rate in a link, discretizes the calculated arrival rate according to thresholds that are set so that the intervals between thresholds in the range in which a large number of the arrival rates in the links with a high frequency of usage exist become narrower, and calculates the link cost according to the value after the discretization. The node apparatus then obtains, from adjacent node apparatuses, the route cost for each route to each final destination that may be reached, and integrates the obtained route cost by the calculated link cost to calculate the route cost to each final destination that can be reached from the local node apparatus via the adjacent node apparatus. The node apparatus then selects the adjacent node apparatus to be the transmission destination according to the route cost of the route to the final destination of a data frame.
摘要翻译： 节点装置计算链路中的到达速率，根据设定的阈值离散化计算出的到达速率，使得存在高频率的链路中存在大量到达率的范围内的阈值间的间隔 变得更窄，并根据离散化后的值计算链路成本。 然后，节点装置从相邻节点装置获取到达可到达的每个最终目的地的每个路由的路由开销，并将获得的路由成本与所计算的链路成本进行积分，以计算到达可达到的最终目的地的路由成本 从本地节点设备经由相邻节点设备。 然后，节点装置根据到数据帧的最终目的地的路由的路由开销，选择作为发送目的地的相邻节点装置。
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公开(公告)号：US20170208598A1
公开(公告)日：2017-07-20
申请号：US15401371
申请日：2017-01-09
申请人： FUJITSU LIMITED
发明人： Nobuhisa Aoki , TOSHIO KAWASAKI , TORU MANIWA , Tadahiro Sato , Yusuke Tobisu , Hiroshi Towata
IPC分类号： H04W72/08 , H04B7/0413
CPC分类号： H04W72/082 , H04B1/126 , H04B1/525 , H04B7/0413
摘要： A distortion cancel device includes: a first acquiring unit that acquires a plurality of transmission signals including at least two transmission signals that are wirelessly transmitted at an identical frequency; a second acquiring unit that acquires a reception signal to which an intermodulation signal generated due to the transmission signals is attached; and a processor that executes a process including: determining a ratio of the transmission signals acquired by the first acquiring unit and wirelessly transmitted at the identical frequency; generating a ratio signal for each frequency from the transmission signals in accordance with the determined ratio; generating a cancel signal corresponding to the intermodulation signal by using an arithmetic expression that uses the generated ratio signal; and combining the generated cancel signal with the reception signal acquired by the second acquiring unit.
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公开(公告)号：US20170207886A1
公开(公告)日：2017-07-20
申请号：US15377999
申请日：2016-12-13
申请人： FUJITSU LIMITED
发明人： TOSHIO KAWASAKI , Nobuhisa Aoki , TORU MANIWA , Tadahiro Sato , Yusuke Tobisu , Hiroshi Towata
CPC分类号： H04L1/206 , H04B1/1027 , H04B1/123 , H04B17/0085 , H04B17/364 , H04L1/242 , H04L5/14
摘要： A delay measuring instrument includes a generating unit and a calculating unit. The generating unit is, for example, a multiplier. The calculating unit is, for example, a maximum value detecting unit. The generating unit generates an intermediate signal by multiplying one of transmission signals or the complex conjugate of the one of the transmission signals included in the plurality of transmission signals that are transmitted at different frequencies by a reception signal that includes therein an intermodulation signal generated by the plurality of the transmission signals. The calculating unit calculates, based on a correlation value between the intermediate signal and the other one of the transmission signals included in the plurality of the transmission signals, an amount of delay of the other one of the transmission signals with respect to the intermodulation signal.
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公开(公告)号：US09621451B2
公开(公告)日：2017-04-11
申请号：US14630343
申请日：2015-02-24
申请人： FUJITSU LIMITED
发明人： Taiji Kondo , Hiroshi Towata , Eizou Ishizu
IPC分类号： H04L12/26 , H04L12/721 , H04L12/707
CPC分类号： H04L45/124 , H04L43/0894 , H04L45/123 , H04L45/22
摘要： Node device calculates reception rate of frames of particular frame type transmitted from adjacent node device, calculates arrival rate of unicast frames on the basis of calculated reception rate and frame length, and calculates inverse number of calculated arrival rate as link cost. Node device obtains from adjacent node device route cost for each route from adjacent node device to each node device that is reachable final destination, calculates route cost of route from node device itself to each node device that is final destination reachable via adjacent node device by integrating calculated link cost and obtained route cost. Node device selects adjacent node device that is transmission destination of data frame on the basis of route cost of route from node device itself to node device that is final destination of data frame when data frame is transmitted.
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公开(公告)号：US20150271054A1
公开(公告)日：2015-09-24
申请号：US14630343
申请日：2015-02-24
申请人： FUJITSU LIMITED
发明人： Taiji Kondo , Hiroshi Towata , Eizou ISHIZU
IPC分类号： H04L12/721 , H04L12/26 , H04L12/707
CPC分类号： H04L45/124 , H04L43/0894 , H04L45/123 , H04L45/22
摘要： Node device calculates reception rate of frames of particular frame type transmitted from adjacent node device, calculates arrival rate of unicast frames on the basis of calculated reception rate and frame length, and calculates inverse number of calculated arrival rate as link cost. Node device obtains from adjacent node device route cost for each route from adjacent node device to each node device that is reachable final destination, calculates route cost of route from node device itself to each node device that is final destination reachable via adjacent node device by integrating calculated link cost and obtained route cost. Node device selects adjacent node device that is transmission destination of data frame on the basis of route cost of route from node device itself to node device that is final destination of data frame when data frame is transmitted.
摘要翻译： 节点设备计算从相邻节点设备发送的特定帧类型的帧的接收速率，基于计算的接收速率和帧长度计算单播帧的到达速率，并将计算出的到达速率的倒数作为链路成本进行计算。 节点设备从相邻节点设备到可达最终目的地的每个节点设备的每个路由的相邻节点设备路由开销，从节点设备本身计算到通过相邻节点设备到达的最终目的地的每个节点设备的路由开销 计算链路成本和获得路由成本。 基于从发送数据帧的节点设备本身到数据帧的最终目的地的节点设备的路由开销，节点设备选择作为数据帧发送目的地的相邻节点设备。
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