-
公开(公告)号：US20190261191A1
公开(公告)日：2019-08-22
申请号：US16309023
申请日：2017-03-21
申请人： HITACHI, LTD.
发明人： Ryo NAKANO , Takuma NISHIMURA , Hirotaka MORIBE , Shinichi TSUNOO
摘要： A network management device manages a wireless multi-hop network; a network configuration management unit that manages communication quality information between wireless devices and between the wireless devices and the gateway; a repeater necessity determination unit that determines whether to add a repeater for each of the wireless devices based on the communication quality information and selects the wireless device that is required to add the repeater based on a determination result; an access point determination unit determines access points for securing a predetermined communication quality for the wireless device selected; and a repeater placement determination unit that determines whether there is a repeater installation location indicating an installation range of the repeater for relaying the wireless device selected and the access point selected by the access point determination unit based on a communication range of the wireless device selected and a communication range of the access point selected.
-
公开(公告)号：US20240215006A1
公开(公告)日：2024-06-27
申请号：US17911765
申请日：2022-02-14
申请人： Hitachi, Ltd.
发明人： Hiromu KAMEI , Mikio KUWAHARA , Ryo NAKANO , Ryosuke FUJIWARA
IPC分类号： H04W72/0457 , H04L45/851 , H04W28/04 , H04W48/18
CPC分类号： H04W72/0457 , H04L45/851 , H04W28/04 , H04W48/18
摘要： To determine a communication path satisfying communication requirements depending on an operation of an application, it is provided a management device for selecting a communication path that satisfies communication requirements for an application operating on a terminal, the management device comprising: an event detection module configured to detect, as an event, one of an operation change, an increase, or a decrease of the application which is accompanied by a change in the communication requirements; app information for managing the communication requirements for each operation of the application; communication path information for managing communication quality of each communication path; and a communication control method calculation module configured to determine, by referring to the app information and the communication path information, a communication control method that satisfies the communication requirements for the application from which the event has been detected, and notify a communication control device of the determined communication control method.
-
公开(公告)号：US20160338099A1
公开(公告)日：2016-11-17
申请号：US15111917
申请日：2014-02-05
申请人： HITACHI, LTD
发明人： Yasutaka SERIZAWA , Masayuki MIYAZAKI , Kenichiro YAMANE , Tatsuki INUDUKA , Ryo NAKANO , Satoru HARADA
摘要： In a multi-hop radio communication network including a base station (a radio station connected to a management server), each radio station in the network is given a data transmission opportunity in turn according to a predetermined transmission order, and transmits data via broadcast or multicast upon occurrence of transmission timing. The radio station having received the data adds data of the radio station to the received data and then forwards the packet via broadcast or multicast when it is the radio station's turn for transmission.
摘要翻译： 在包括基站（连接到管理服务器的无线电台）的多跳无线电通信网络中，网络中的每个无线电台根据预定的传输顺序依次被给予数据传输机会，并且经由广播或 发送发送定时时多播。 接收到该数据的无线电台将无线电台的数据添加到接收的数据，然后在无线电台的转弯时通过广播或组播转发分组。
-
公开(公告)号：US20200090424A1
公开(公告)日：2020-03-19
申请号：US16617663
申请日：2018-04-17
申请人： Hitachi, Ltd.
发明人： Jumpei HONDA , Takuma NISHIMURA , Hiroshige KASHIWABARA , Hidemasa NAKAI , Yuichi IGARASHI , Ryo NAKANO
IPC分类号： G07C5/00 , H04L12/733
摘要： An inspection target reading device includes a wireless slave station that performs communication via a wireless network, a measurement unit that measures a state of an inspection target, and an analysis unit that generates measurement data, and transmits the measurement data from the wireless slave station via the wireless network. An automatic inspection system includes a wireless master station that communicates with each inspection target reading device via the wireless network, a data acquisition unit that acquires the measurement data from each inspection target reading device through a wireless master station, a data storage unit that stores the measurement data, a determination condition storage unit that stores determination conditions related to the measurement data, and an inspection unit that outputs predetermined measurement data selected from the stored measurement data and a predetermined determination condition corresponding to the predetermined measurement data among the stored determination conditions in association with each other.
-
公开(公告)号：US20210289365A1
公开(公告)日：2021-09-16
申请号：US16468474
申请日：2017-12-22
申请人： HITACHI, LTD.
发明人： Ryo NAKANO , Yuichi IGARASHI , Takuma NISHIMURA
IPC分类号： H04W16/18 , H04B7/26 , H04B17/40 , H04B17/309
摘要： A communication system includes: storage to store location information of each of a plurality of devices capable of wireless multi-hop communication, site configuration information including location and size information of an obstacle present at a site of the plurality of devices, and communication quality information between devices; a determination unit determines whether a repeater needs to be added for each of the plurality of devices, based on communication quality information; and a decision unit calculates an expected value related to attenuation of received power between the first and second devices caused by the obstacle, and decides a location for the determination unit to add the repeater based on location information of the first device determined, location information of the second device different from the first device and communicated with the first device through the repeater, the communication quality information between the first and second device, and the site configuration information.
-
-
-
-
搜索结果
5 条记录 (耗时 0.014 秒)
