公开(公告)号：US20240063902A1

公开(公告)日：2024-02-22

申请号：US18498545

申请日：2023-10-31

Applicant: NEC Corporation

Inventor： Yohei HASEGAWA

IPC: H04B10/079 ,  H04B10/29

CPC classification number: H04B10/0795 ,  H04B10/29

Abstract: Provided are a communication device, a communication controlling method, and a non-transitory computer-readable medium storing a communication controlling program that each make it possible to grasp the condition of communication quality. A communication device (1) includes acquiring means (2) configured to acquire quality information concerning a burst error that has occurred in an optical communication line. The communication device (1) includes estimating means (3) configured to estimate a first index value based on the quality information acquired by the acquiring means (2), the first index value indicating a degree of influence of the burst error on communication quality in a first communication device.

公开(公告)号：US20210006952A1

公开(公告)日：2021-01-07

申请号：US16975622

申请日：2019-03-28

Applicant: NEC CORPORATION

Inventor： Yohei HASEGAWA

IPC: H04W4/38 ,  H04W52/34 ,  H04W72/04 ,  H04L1/18

Abstract: A sever transmits an acknowledgement in response to data transmission from first and second terminals, respectively, among a plurality of terminals. The server controls the first and second terminals so that the first and second terminals open a reception slot at substantially the same timing. The server transmits a collective acknowledgement shared by the first and second terminals during both of the first and second terminals open the reception slot.

公开(公告)号：US20200028631A1

公开(公告)日：2020-01-23

申请号：US16488869

申请日：2018-02-20

Applicant: NEC Corporation

Inventor： Yohei HASEGAWA

IPC: H04L1/18 ,  H04L5/00 ,  H04L1/16

Abstract: A receive terminal setting a non-delivery determination time for determining that a next data packet is not delivered after transmitting an acknowledgement (ACK) packet for a received data packet; when the next data packet is not delivered within the non-delivery determination time, the receive terminal repeatedly transmits a retransmission request (RACK) packet prompting the transmission of the next data packet; a transmit terminal specifies a non-delivered data packet using time difference information based on the time-of-day information of the received ACK packet and RACK packet and retransmits the specified data packet to the receive terminal; the time-of-day information here is a time stamp added by the receive terminal to each of the ACK packet and RACK packet when transmitted, or a time stamp added by the transmit terminal to each of the ACK packet and RACK packet when received.

公开(公告)号：US20160241465A1

公开(公告)日：2016-08-18

申请号：US15025746

申请日：2014-04-25

Applicant: NEC CORPORATION

Inventor： Yohei HASEGAWA ,  Atsushi IWATA

IPC: H04L12/703 ,  H04L12/24 ,  H04L12/939 ,  H04L12/707

CPC classification number: H04L45/28 ,  H04L41/0631 ,  H04L45/22 ,  H04L49/557

Abstract: A communications control device that, if a communications failure occurs at location in a first path for communications that extends across a plurality of communications layers, selects any second path from a candidate group including at least one second path for continuing communications without going via the location where the communications failure has occurred, on the basis of the time required for each second path to switch from the first path to the second path, and sends, to a communications device for performing the switching, an instruction for switching the first path to the selected second path and continuing communications.

Abstract translation: 一种通信控制装置，如果在跨越多个通信层的通信的第一路径中的位置处发生通信故障，则从包括用于连续通信的至少一个第二路径的候选组中选择任何第二路径，而不经由所述位置 基于每个第二路径从第一路径切换到第二路径所需的时间，发送通信故障，并且将用于切换第一路径的指令发送到用于执行切换的通信设备 选择的第二条路径和持续通信。