公开(公告)号：US11695702B2

公开(公告)日：2023-07-04

申请号：US17284930

申请日：2019-10-16

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Hiroki Iwasawa ,  Kenta Kawakami ,  Takeshi Kuwahara

IPC: H04L47/2441 ,  H04L47/24 ,  H04L47/52

CPC classification number: H04L47/2441 ,  H04L47/2458 ,  H04L47/52

Abstract: A packet transfer device 100 includes a packet classification unit 120 configured to classify received packets, queues 140 for respective classifications, priorities being set to the queues, a dequeue processing unit 150 configured to extract packets from the queue under a predetermined rule based on the priorities set to the queues, and a queue priority control unit 130 configured to perform control, upon detecting that a reception amount of packets related to a communication flow temporarily or intermittently increases from a reception amount under a normal condition, such that a priority of one of the queues holding the packets related to the communication flow is temporarily raised from a priority under the normal condition, during a period while the reception amount of packets related to the communication flow temporarily or intermittently increases.

公开(公告)号：US11477121B2

公开(公告)日：2022-10-18

申请号：US17261917

申请日：2019-07-26

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Hiroki Iwasawa ,  Kazuhiro Tokunaga ,  Shinya Tamaki ,  Takeshi Kuwahara

IPC: H04L47/215 ,  H04L47/2441 ,  H04L47/52 ,  H04L47/62

Abstract: A packet transfer apparatus is configured to perform packet exchange processing for exchanging multiple continuous packets with low delay while maintaining fairness between communication flows of the same priority level. The packet transfer apparatus includes: a packet classification unit; queues that holds the classified packets for each classification; and a dequeue processing unit that extracts packets from the queues. The dequeue processing unit includes a scheduling unit that controls the packet extraction amount extracted from the queue for a specific communication flow based on information on the amount of data that is requested by the communication flow and is to be continuously transmitted in packets.

公开(公告)号：US12040995B2

公开(公告)日：2024-07-16

申请号：US18253671

申请日：2020-11-25

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Hiroki Iwasawa ,  Nobuhiro Azuma ,  Takahide Kitsu ,  Hitoshi Masutani ,  Takeshi Kuwahara

IPC: G06F15/173 ,  H04L47/70

CPC classification number: H04L47/826

Abstract: A control device that performs resource allocation to a network including a transmission device, one or more transfer devices, and a reception device as nodes, the control device including a schedule database unit that holds schedules of time slots not allocated to specific communication, the schedules being set in advance for respective nodes of the network, and a schedule processing unit that, in a case where a communication request is received, selects a time slot that satisfies a transmission request amount of the transmission device on the basis of remaining transmittable amounts of respective time slots in the schedules and notifies the transmission device of a selected time slot.

公开(公告)号：US12039655B2

公开(公告)日：2024-07-16

申请号：US17802394

申请日：2020-02-28

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Daishi Aiura ,  Hiroki Iwasawa ,  Kenta Kawakami ,  Takeshi Kuwahara

IPC: G06T15/00

CPC classification number: G06T15/005

Abstract: A resource estimation device is configured to estimate a resource for a virtual terminal. The resource estimation device includes: a resource estimation unit configured to calculate a resource value corresponding to a VR image output scheme and a characteristic value of 3D data, using resource relation information, the resource value causing the virtual terminal to operate at the characteristic value, the VR image output scheme being a scheme for outputting the VR image and being input, the 3D data being data about an object that is drawn by a VR application program, the resource relation information being set for each VR image output scheme and indicating a relation about change between the characteristic value and the resource value, and configured to calculate the resource value as the resource necessary for the virtual terminal; and a relation correction unit configured to alter the resource value included in the resource relation information.

公开(公告)号：US20220366629A1

公开(公告)日：2022-11-17

申请号：US17623964

申请日：2019-07-01

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Shinya Tamaki ,  Takeshi KUWAHARA ,  Kenta KAWAKAMI ,  Yusuke URATA ,  Hiroki Iwasawa

IPC: G06T15/00 ,  G06F11/34

Abstract: A delay measurement device that is to be connected, via a communication network, to a rendering server that performs rendering processing on an image, includes: transmission means for transmitting, to the rendering server, sensor information acquired from a sensor included in the delay measurement device and trigger information acquired in a predetermined time period; receiving means for receiving a rendered image generated through the rendering processing performed in the rendering server based on the sensor information and the trigger information; and measurement means for measuring a predetermined delay based on a difference between a first time indicating a time when the trigger information was transmitted to the rendering server and a second time indicating a time when the rendered image or a predetermined image was displayed.

公开(公告)号：US20210352020A1

公开(公告)日：2021-11-11

申请号：US17284930

申请日：2019-10-16

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Hiroki Iwasawa ,  Kenta Kawakami ,  Takeshi Kuwahara

IPC: H04L12/851 ,  H04L12/873 ,  H04L12/833

Abstract: For an application collectively transmitting a group of packets desired to be transmitted at once, the group of successive packets are transferred with low latency, while fairness is maintained among communication flows with the identical priority. A packet transfer device 100 includes a packet classification unit 120 configured to classify received packets, queues 140 for respective classifications, priorities being set to the queues, a dequeue processing unit 150 configured to extract packets from the queue under a predetermined rule based on the priorities set to the queues, and a queue priority control unit 130 configured to perform control, upon detecting that a reception amount of packets related to a communication flow temporarily or intermittently increases from a reception amount under a normal condition, such that a priority of one of the queues holding the packets related to the communication flow is temporarily raised from a priority under the normal condition, during a period while the reception amount of packets related to the communication flow temporarily or intermittently increases.

公开(公告)号：US20210314267A1

公开(公告)日：2021-10-07

申请号：US17261917

申请日：2019-07-26

Applicant: Nippon Telegraph and Telephone Corporation

Inventor： Hiroki Iwasawa ,  Kazuhiro Tokunaga ,  Shinya Tamaki ,  Takeshi Kuwahara

IPC: H04L12/819 ,  H04L12/873 ,  H04L12/863 ,  H04L12/851

Abstract: Provided is a packet transfer apparatus configured to per form packet exchange processing for exchanging multiple continuous packets with low delay while maintaining fairness between communication flows of the same priority level. A packet transfer apparatus 100 includes: a packet classification unit 120; queues 130 that holds the classified packets for each classification; and a dequeue processing unit 140 that extracts packets from the queues 130. The dequeue processing unit 140 includes a scheduling unit 141 that controls the packet extraction amount extracted from the queue 130 for a specific communication flow based on information on the amount of data that is requested by the communication flow and is to be continuously transmitted in packets.