公开(公告)号：US20210406077A1

公开(公告)日：2021-12-30

申请号：US16646901

申请日：2019-07-18

Applicant: PHOTONICS ELECTRONICS TECHNOLOGY RESEARCH ASSOCIATION

Inventor： Yutaka Urino

IPC: G06F9/50 ,  G06F17/16 ,  G06F15/173

Abstract: Speeding up of parallel computation is to be achieved. A parallel computation method comprises a step for distributing respective first-level small pieces of data, that are formed by dividing data, to respective computation nodes in plural computation nodes; a step for further dividing, in at least one first computation node in the plural computation nodes, the first-level small piece of data into second-level small pieces of data; a step for transferring, in parallel, the respective second-level small pieces of data from the at least one first computation node to the plural computation nodes; a step for transferring, in parallel, the transferred second-level small pieces of data from the respective computation nodes in the plural computation nodes to at least one second computation node in the plural computation nodes; and a step for reconstructing, in the at least one second computation node, the first-level small piece of data by using the second-level small pieces of data transferred from the plural computation nodes.

公开(公告)号：US20190268085A1

公开(公告)日：2019-08-29

申请号：US16344269

申请日：2017-09-06

Applicant: PHOTONICS ELECTRONICS TECHNOLOGY RESEARCH ASSOCIATION

Inventor： Yutaka Urino

IPC: H04J14/02 ,  H01S3/11 ,  H04B10/40 ,  G02F1/017 ,  G02F1/025

Abstract: In an embodiment, a network system comprises a plurality of nodes and a plurality of optical amplifiers. A first node comprises a first transmitter configured to send a wavelength-division-multiplexed optical signal and a first receiver configured to receive a wavelength-division-multiplexed optical signal, and the second node comprises a second transmitter configured to send a wavelength-division-multiplexed optical signal and a second receiver configured to receive a wavelength-division-multiplexed optical signal. The first transmitter and the second transmitter are optically connected to an input of the first optical amplifier and an input of the second optical amplifier, respectively, and the first receiver and the second receiver are optically connected to an output of the first optical amplifier and an output of the second optical amplifier, respectively. Each of the first photoreceiver and the second photoreceiver comprises a photoreceiver and a reception circuit. The photoreceiver is electrically connected, by flip chip connection, to a reception circuit. A reception circuit is configured not to comprise a transimpedance amplifier.

公开(公告)号：US11212214B2

公开(公告)日：2021-12-28

申请号：US16562742

申请日：2019-09-06

Applicant: NEC CORPORATION ,  PHOTONICS ELECTRONICS TECHNOLOGY RESEARCH ASSOCIATION ,  FUJITSU LIMITED

Inventor： Kenji Mizutani ,  Yutaka Urino ,  Tatsuya Usuki

IPC: H04L12/733 ,  H04L12/721 ,  H04L12/18 ,  H04L12/707 ,  H04L12/755

Abstract: A parallel computer system includes: direct links that forms a direct connection between a sending node and a receiving node, one-hop links that forms a connection between a sending node and a receiving node by way of a return node that is other than the sending node and the receiving node, and a communication control unit that, when transferring data from a sending node to a receiving node, selects the link that connects the sending node and the receiving node from among a link that uses only a direct link, a link that uses only a one-hop link, and a link that forms a connection combines and uses the direct link and the one-hop link.