公开(公告)号：US20210282052A1

公开(公告)日：2021-09-09

申请号：US17261272

申请日：2019-07-19

申请人： Nippon Telegraph and Telephone Corporation

发明人： Kenji Miyamoto ,  Keita Takahashi ,  Hirofumi Yamamoto ,  Noriyuki Ota ,  Jun TERADA

IPC分类号： H04W28/08 ,  H04L12/933 ,  H04W40/34 ,  H04W84/20

摘要： Provided is a control apparatus that controls any one or all of a plurality of slave station apparatuses communicating with a terminal apparatus, a plurality of master station apparatuses that control the slave station apparatuses, and a transfer apparatus that transfers data transmitted and received between the master station apparatuses and the slave station apparatuses, the control apparatus including an information acquisition unit that acquires information regarding traffic of the data transmitted and received between the master station apparatuses and the slave station apparatuses, and a switching control unit that performs, on the basis of the information regarding the traffic acquired by the information acquisition unit, switching-control of an assignment relationship between the master station apparatus and the slave station apparatus and switching-control of a transfer path of data between the master station apparatus and the slave station apparatus.

公开(公告)号：US11923950B2

公开(公告)日：2024-03-05

申请号：US17291254

申请日：2019-10-25

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Naotaka Shibata ,  Hirofumi Yamamoto ,  Keita Takahashi ,  Noriyuki Ota ,  Jun Terada

IPC分类号： H04B7/155 ,  H04W28/16 ,  H04W88/12

CPC分类号： H04B7/15507 ,  H04W28/16 ,  H04W88/12

摘要： A relay device that relays between a plurality of radio devices that perform radio communication with terminals, and at least one radio control device that controls the radio devices, the relay device including: a replication necessity determination unit that determines whether or not to replicate a downlink signal received from the radio control device; a signal replicating unit that makes the same number of copies of a downlink signal as the number of destination radio devices only when the replication necessity determination unit determines that the downlink signal is to be replicated; and a downlink signal assignment unit that transfers a downlink signal that has been determined by the replication necessity determination unit as a signal that is not to be replicated, and downlink signals replicated by the signal replicating unit, to the radio devices respectively corresponding thereto.

公开(公告)号：US11757788B2

公开(公告)日：2023-09-12

申请号：US17910277

申请日：2020-03-09

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Hiroko Nomura ,  Naotaka Shibata ,  Keita Takahashi ,  Tomoya Hatano

IPC分类号： H04L47/62 ,  H04L47/6275

CPC分类号： H04L47/6215 ,  H04L47/6275

摘要： In a signal transfer system including a signal transfer management apparatus and a plurality of signal transfer apparatuses connected in multiple stages and forming a network between a distribution station apparatus and a central station apparatus, a signal transfer apparatus on an upper side among the plurality of signal transfer apparatuses transmits a timing adjustment request to at least one of a plurality of signal transfer apparatuses on a lower side among the plurality of signal transfer apparatuses upon determining that there is a possibility that a microburst occurs according to mobile scheduling information received from the plurality of signal transfer apparatuses on the lower side, and the signal transfer apparatus on the lower side that has received the timing adjustment request from the signal transfer apparatus on the upper side adjusts opening and closing timings of a gate based on the timing adjustment request. This can prevent the occurrence of a microburst.

公开(公告)号：US20240323746A1

公开(公告)日：2024-09-26

申请号：US18578805

申请日：2021-10-12

申请人： Nippon Telegraph and Telephone Corporation

发明人： Kenji Miyamoto ,  Yoshihito SAKAI ,  Tatsuya SHIMADA ,  Keita Takahashi

IPC分类号： H04W28/02 ,  H04L47/22

CPC分类号： H04W28/0236 ,  H04L47/225

摘要： A communication system including one or more base stations that accommodates wireless terminals, one or more transfer apparatuses that transfer uplink communication of the wireless terminal received via the base station to an upper side, and a transfer apparatus controller that controls the one or more transfer apparatuses includes an information acquisition unit that acquires information on wireless communication between the base station and the wireless terminal for each traffic flow, a rate determination unit that determines a shaping rate of the traffic shaping for each traffic flow, so that delay jitter in the base station is mitigated on an upper side with respect to the base station, on the basis of the information on the wireless communication for each traffic flow, and a communication control unit that executes traffic shaping on the upper side with respect to the base station on the basis of the shaping rate determined by the rate determination unit.

公开(公告)号：US20240171521A1

公开(公告)日：2024-05-23

申请号：US18283044

申请日：2021-03-23

申请人： Nippon Telegraph and Telephone Corporation

发明人： Takamitsu TOCHINO ,  Tatsuya SHIMADA ,  Keita Takahashi ,  Yoshihito SAKAI

IPC分类号： H04L47/6275 ,  H04L47/56 ,  H04L49/9047

CPC分类号： H04L47/6275 ,  H04L47/56 ,  H04L49/9047

摘要： A signal transfer device according to an embodiment receives a plurality of signals including an aperiodic signal having a higher priority than other signals, respectively holds the plurality of received signals by a plurality of buffers according to the priority, acquires signal information including at least one of a time at which the aperiodic signal is transmitted or received and a data length of the aperiodic signal, predicts a timing at which the aperiodic signal arrives at the buffer based on the acquired signal information, sets reservation of a period for transmitting the aperiodic signal with priority over other signals based on the predicted timing, controls the plurality of buffers to output the aperiodic signal with priority over other signals in the period in which the reservation is set, and transmits the signal output by the buffer.

公开(公告)号：US11804920B2

公开(公告)日：2023-10-31

申请号：US17800136

申请日：2020-02-18

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Keita Takahashi ,  Naotaka Shibata ,  Jun Terada

IPC分类号： H04J3/06 ,  G06F13/00 ,  G06F13/38 ,  G06F13/42

CPC分类号： H04J3/0667 ,  G06F13/38 ,  G06F13/42 ,  H04J3/0682

摘要： A signal transfer management apparatus manages operations of a plurality of signal transfer devices. The signal transfer management apparatus includes a gate calculation unit configured to calculate a gate start time of each of uplink time gates and a gate start time of each of downlink time gates of a plurality of signal transfer devices and open each of the time gates, a comparison unit configured to compare uplink time synchronization messages from the plurality of slave devices to a master device and detect a conflict between the uplink time synchronization messages, and an offset unit configured to, when the comparison unit detects a conflict, adjusts the gate start time of each of the uplink time gates and the gate start time of each of the downlink time gates of the signal transfer devices and set the adjusted gate start times in the signal transfer devices.

公开(公告)号：US20230291492A1

公开(公告)日：2023-09-14

申请号：US18011580

申请日：2020-06-29

申请人： Nippon Telegraph and Telephone Corporation

发明人： Naotaka SHIBATA ,  Hiroko Nomura ,  Keita Takahashi ,  Tomoya HATANO

IPC分类号： H04J14/02 ,  H04L45/00 ,  H04L49/25

CPC分类号： H04J14/0267 ,  H04L45/62 ,  H04L49/25

摘要： Provided is a multiplex transmission system capable of preventing occurrence of a mistake on connection of a client device to a multiplex transmission device. The multiplex transmission system includes: an extraction means configured to extract identification information from a signal inputted to a client port of each of a first multiplex transmission device 100 and a second multiplex transmission device 200; and a switch control unit 340 configured to control a switch unit 330 to connect the client port of the first multiplex transmission device 100 with the client port of the second multiplex transmission device 200 on the basis of a result of collation between identification information extracted from a signal inputted to the client port of the first multiplex transmission device 100 and identification information extracted from a signal inputted to the client port of the second multiplex transmission device 200.

公开(公告)号：US11509357B2

公开(公告)日：2022-11-22

申请号：US17261814

申请日：2019-07-23

申请人： Nippon Telegraph and Telephone Corporation

发明人： Kenji Miyamoto ,  Keita Takahashi ,  Hirofumi Yamamoto ,  Noriyuki Ota ,  Jun Terada

IPC分类号： H04B7/026 ,  H04B7/155 ,  H04W88/08 ,  H04W92/04

摘要： A relay device for relaying communications between a plurality of radio devices that perform radio communications with a terminal and a radio control apparatus that controls the plurality of radio devices, the relay device including a plurality of signal combiners that are each provided for one of functional splitting points between the plurality of radio devices and the radio control apparatus, and are each configured to convert signal data transmitted from one of the plurality of radio devices based on a signal format in accordance with the one of the functional splitting points, and transmit the converted signal data to the radio control apparatus, and a signal switcher configured to output the signal data transmitted from the one of the plurality of radio devices, to one of the plurality of signal combiners supporting one of the functional splitting points that corresponds to the one of the plurality of radio devices.