公开(公告)号：US20190230577A1

公开(公告)日：2019-07-25

申请号：US16123454

申请日：2018-09-06

Applicant: Hitachi, Ltd.

Inventor： Toshiaki SUZUKI ,  Taro OGAWA ,  Tomoko MOTOHASHI ,  Jun NAKAJIMA ,  Takatoshi KAJIWARA

IPC: H04W48/02 ,  H04W76/30 ,  H04W28/10 ,  H04W36/22 ,  H04L12/851 ,  H04L12/26 ,  H04L29/06

Abstract: A network management system includes a plurality of server units. A first management server included in a first server unit transmits a disconnection setting request for disconnecting an abnormal flow to each of a communication node connected to a self-region covered by the first management server, and one or more second server units covering one or more primary adjacent regions adjacent to the self-region. Disconnection setting is executed in response to the disconnection setting request. Each of a plurality of regions includes two or more areas each of which is covered by corresponding one of two or more base stations connected to an identical communication node.

公开(公告)号：US20170288973A1

公开(公告)日：2017-10-05

申请号：US15471100

申请日：2017-03-28

Applicant: HITACHI, LTD.

Inventor： Toshiaki SUZUKI ,  Hayato HOSHIHARA ,  Taro OGAWA

IPC: H04L12/24 ,  H04L12/721

CPC classification number: H04L41/12 ,  H04L41/0896 ,  H04L45/124

Abstract: A network management device retains path information of paths as a list of node identifying information to identify nodes, the path information including information on paths sharing a link regarding a relation in which one path shares a link with another path. According to the information on paths sharing a link, the network management device determines a path setup timing for a path to be the same for a group of one or more paths that do not share a same link with the path and determines a different path setup timing for a group of one or more paths that share a same link with the path than the timing for the group including the path, and executes path setup via communication devices existing on paths constituting each group of paths as per path setup timing determined for each group.

公开(公告)号：US20180213600A1

公开(公告)日：2018-07-26

申请号：US15880047

申请日：2018-01-25

Applicant: HITACHI, LTD.

Inventor： Toshiaki SUZUKI ,  Taro OGAWA ,  Jun NAKAJIMA

IPC: H04W88/18 ,  H04W40/20 ,  H04W72/12 ,  H04W24/02 ,  H04W28/02 ,  H04W28/10 ,  H04W40/36 ,  H04W36/14

CPC classification number: H04W88/18 ,  H04L41/0836 ,  H04L43/0811 ,  H04W24/02 ,  H04W28/021 ,  H04W28/10 ,  H04W36/14 ,  H04W40/026 ,  H04W40/20 ,  H04W40/36 ,  H04W72/121 ,  H04W84/12 ,  H04W88/08

Abstract: The network system includes a plurality of communication nodes, a network that is connected to the plurality of communication nodes, and a network management server that is connected to the network. The network management server accepts information of a plurality of regions in each of which a plurality of areas that are assigned to the respective communication nodes are grouped, and the network management server executes setting of controlling an abnormal flow on the communication nodes to which the areas grouped in a first region in which the areas assigned to the communication node notifying detection of the mobile unit that transmits the abnormal flow are grouped and at least one second region adjacent to the first region are assigned.