Nec Corporation

Hirose Electric Company, Ltd.

Kioxia Corporation

Yohei Hasegawa

Masahiro Jibiki

Takahiro Abe

Hideyuki Shimonishi

Tutomu Murase

Atsushi Iwata

Hidemi Noguchi

Toshiharu Ito

Tatsuhiro Nakada

Masayoshi Kobayashi

Shigeyuki Yanagimachi

Yasuhiro Yamasaki

Yasuhiro Yamazaki

Masahiro Hayashitani

Shohei Onishi

Yohei Iizawa

Goh Shibata

Yuko Asano

Atsushi Kawabata

According to one embodiment, a memory system includes a first memory region, a second memory region, and a controller. The controller is configured to control coupling between the first memory region and the second memory region at one end and a host device at another, generate first interleave setting information corresponding to the first memory region, select the first memory region based on the first interleave setting information when an access request is received from the host device, and update the first interleave setting information to second interleave setting information corresponding to the second memory region and not corresponding to the first memory region based on an amount of accumulated wear in the first memory region.

Memory system

A switching device includes an optical communication unit configured to receive an optical communication signal; and a control unit configured to switch a path for the optical communication unit to receive an optical communication signal based on at least one of reception power of the optical communication signal received by the optical communication unit, an error rate of a synchronous signal therefor, an error rate after signal demodulation thereof, an error rate after error correction decoding thereof, and an SN (Signal-to-Noise) ratio of the path for the optical communication signal.

Switching device and switching method

A communication apparatus capable of easily grasping a communication quality status includes: an acquisition unit configured to acquire measured values of a predetermined number or more measured for communication quality information in an optical communication path; an estimation unit configured to calculate an average value of the acquired measured values, generate a first cumulative distribution function of the communication quality information based on the acquired measured values, and estimate a second cumulative distribution function of the communication quality information based on measured values when the measured values more than a number of the acquired measured values are acquired based on the average value and the first cumulative distribution function; and a determination unit configured to determine a value of the communication quality information as a reference quality value, a cumulative probability in the second cumulative distribution function becoming a predetermined value at the value of the communication quality information.

Communication apparatus, communication control method, non-transitory computer readable medium, and optical communication system

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 () includes acquiring means () configured to acquire quality information concerning a burst error that has occurred in an optical communication line. The communication device () includes estimating means () configured to estimate a first index value based on the quality information acquired by the acquiring means (), the first index value indicating a degree of influence of the burst error on communication quality in a first communication device.

Communication device, communication controlling method, and non-transitory computer-readable media

Provided is a communication device that can deliver an improvement in the communication capacity of communication infrastructure with the quality of communication taken into consideration. A communication device includes an acquiring unit configured to acquire quality information of a communication line extending from a first communication device to a second communication device and including an optical communication line, an estimating unit configured to estimate the quality of communication of the second communication device and determine the required quality of communication of the second communication device based on the quality information, and a controlling unit configured to perform control on communication channels in the optical communication line so that the quality of communication satisfies the required quality of communication.

Communication device, communication controlling method, non-transitory computer-readable medium, and optical communication system

A communication system includes: a transmitting-side terminal; a transmitting-side communication apparatus configured to receive data transmitted by the transmitting-side terminal and transmit the received data by radio transmission to a receiving-side communication apparatus; and the receiving-side communication apparatus configured to transmit the data received by radio transmission from the transmitting-side communication apparatus to a receiving-side terminal. The transmitting-side terminal includes a control unit configured to control a transmission speed of the data addressed to the receiving-side terminal based on a first error rate that is an error rate of radio transmission from the transmitting-side communication apparatus to the receiving-side communication apparatus and a second error rate that is an error rate of transmission from the transmitting-side terminal to the receiving-side terminal.

Communication system, terminal, control method, and nontransitory computer-readable medium storing program

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.

Server, communication system, communication method and program

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.

Communication system, communication device, method, and recording medium of program

A communication control devicethat determines second communication processing that is communication processing that can be executed in parallel with first communication processing that is communication processing that is executed between a transmission terminal and a reception terminal. The communication control device including: a transmission power determination unitthat determines conditions for the transmission power of a signal that would not impede the first communication processing, even if a signal that is transmitted by means of the second communication processing is received by the reception terminal; and a destination determination unitthat determines a destination for the second communication processing from among terminals at which a signal that is transmitted at transmission power that satisfies the determined conditions could arrive.

Communication control method, communication control device, and communication control program

Terminalsinvolving stationary-side retained portionsare held in place by stationary housings, movable-side retained portionsare held in place by a movable housing, and resilient portionsare provided between said stationary-side retained portionsand movable-side retained portions. In the above-mentioned housing, in the terminal array direction, retaining fittingsare attached at locations outside said terminal array range, the above-mentioned retaining fittingsinclude mounting portionsfixedly attached to the housing and retaining portionsthat clamp and hold the counterpart connector component. The retaining portionsof said retaining fittingsclamp and hold the above-mentioned counterpart connector component, thereby maintaining the locations of contact between the contact portions of the above-mentioned terminalsand the above-mentioned counterpart connector component.

Assembly including electrical connector for circuit boards and counterpart connector component

A connector with stationary housings, a movable housing, and terminals. The terminals have a movable-side retained portion including a contact portion secured in place by unitary molding in a movable-side retaining portion of the movable housing, a stationary-side retained portion secured in place by unitary molding at a location proximate the connecting portion of the terminals in a stationary-side retaining portion of the stationary housing, and a resiliently displaceable resilient portion coupling the movable-side retained portion to the stationary-side retained portion. The resilient portion has a curved apex portion constituting the upper end of the resilient portion outwardly of the movable-side retained portion in the connector-width direction, and lateral open spaces, which are open in the connector-width direction, are formed in a range including at least the apex portion below the above-mentioned movable-side retaining portion positioned above the apex portion.

Electrical connector for circuit boards and manufacturing method thereof

Electrical connector for circuit boards provided with terminals having connecting portions configured to be connected to a circuit board at one end in the longitudinal direction of said terminals and contact portions configured to be placed in contact with a counterpart connector component at the other end, and a housing holding a plurality of said terminals in place in array form. Said housing having disposed therein the contact portions of the terminals, and formed such that it is divided into a receiving-side housing, which accommodates the contact portions and receives a counterpart connector component such that it is placed in contact with the contact portions, and a board-side housing, which holds the terminals in place in sections more proximal to the connecting portions than to the contact portions and which is mounted to a circuit board, and the receiving-side housing and the board-side housing are molded as a single unit.

Electrical connector for circuit boards and method of manufacture thereof

Terminalsincluding stationary-side retained portions are held in place by stationary housings, movable-side retained portions are held in place by a movable housing, and resilient portions are provided between said stationary-side retained portions and movable-side retained portions, and, in the movable housing, abutment portionsof abutment fittings are provided on the bottom face that faces the circuit board, thereby facilitating the above-mentioned abutment portionsto abut the surface of the circuit board when the movable housingmoves towards the circuit board.

Stationary housingsinvolve stationary-side reinforcing fittingssecured in place in said stationary housingsvia integral molding with said stationary housingsand, moreover, a movable housing involves movable-side reinforcing fittingssecured in place in said movable housingvia integral molding with said movable housing. The stationary-side reinforcing fittingsinvolve exposed portionsexposed from the stationary housingsat locations outside the terminal array range of said terminals in the terminal array direction, and the movable-side reinforcing fittingsinvolve expanded portionsprotruding from the movable housingat locations outside the above-mentioned array range.

Growing community of inventors

Tokyo, Japan

Yohei Hasegawa