Tokyo, Japan
Tokyo, Japan

Fujitsu Ltd. is a Japanese multinational information technology equipment and services company headquartered in Tokyo, Japan. It is the world's third-largest IT services provider measured by revenues .Fujitsu chiefly makes computing products, but the company and its subsidiaries also offer a diversity of products and services in the areas of personal computing, telecommunications, advanced microelectronics, and air conditioning. It has approximately 162,000 employees and its products and services are available in over 100 countries.Fujitsu is listed on the Tokyo Stock Exchange and is a constituent of the Nikkei 225 and TOPIX indices. Wikipedia.


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Patent
Fujitsu Limited | Date: 2017-01-27

For an analysis method, a first specimen and a second specimen are prepared, in which different phthalate esters, for example DEHP and DINP, adhere in different states to a pair of predetermined base films, such as PVC, on metal plates. A metal reflection IR spectrum (P) and a metal reflection IR spectrum (Q) are acquired by radiating electromagnetic waves on the prepared first specimen and the second specimen respectively. Significantly different spectra are obtained for different phthalate esters, and the types of phthalate esters are identified by using such spectra.


When an electronic mail is transmitted, a computer outputs (S25) to a display device (111) a transmission confirmation screen (21) on which a destination or an attached file name is displayed, the destination or the attached file name being different from a destination or an attached file name that has been set by a user in the electronic mail, and on which whether transmission of the electronic mail will be performed is selectable. Upon receipt of selection of whether the transmission will be performed, the computer outputs (S27, S31, S33) to the display device message information (31, 35, 51) that varies according to a result of the selection of whether the transmission will be performed on the transmission confirmation screen.


A first node included in a first layer determines whether there has occurred a failure in a sink node included in a second layer subordinate to the first layer. The first node requests a second node included in the second layer to collect information of a third node included in a third layer subordinate to the second layer when the first node determines that there has occurred a failure in the sink node. The first node determines a fourth node serving as a substitute for the failed sink node included in the second layer on a basis of the information of the third node collected by the second node.


Embodiments of this disclosure provide a beam-based information transmission method and apparatus and a communications system. The information transmission method includes: a base station receives a measurement result obtained by measuring one or more beams and transmitted by user equipment; selects one or more transmission beams for the user equipment based on the measurement result; transmits information on the selected transmission beams to the user equipment; and performs diversity transmission of information by using the selected transmission beams. With the embodiments of this disclosure, a problem of coverage of the system may further be solved, and a good tradeoff between a diversity gain and a beamforming gain may be obtained. Furthermore, inter-cell interference may be efficiently suppressed, and an average throughput of the cell may be improved.


A wireless communication system includes a baseband processing device configured to transmit a data signal via an optical transmission line, and a wireless device configured to receive the data signal via the optical transmission line and carry out wireless transmission of an output signal obtained by amplifying the data signal, wherein the wireless device is configured to amplify the data signal to generate the output signal, generate a feedback signal according to the output signal, and transmit the feedback signal to the baseband processing device via the optical transmission line, and wherein the baseband processing device is configured to acquire the feedback signal from the wireless device, and execute first processing of multiplying the data signal by a distortion compensation coefficient corresponding to an inverse characteristic of distortion in the radio frequency circuit based on the feedback signal.


A semiconductor structure includes first, second, and third transistor elements each having a first screening region concurrently formed therein. A second screening region is formed in the second and third transistor elements such that there is at least one characteristic of the screening region in the second transistor element that is different than the second screening region in the third transistor element. Different characteristics include doping concentration and depth of implant. In addition, a different characteristic may be achieved by concurrently implanting the second screening region in the second and third transistor element followed by implanting an additional dopant into the second screening region of the third transistor element


Patent
Fujitsu Limited | Date: 2017-05-17

There is provided a transmission apparatus configured to transmit an optical signal by using a plurality of subcarriers, the transmission apparatus includes: a plurality of modulators, a modulator of the plurality of modulators configured to be capable of changing a modulation format corresponding to a subcarrier of the plurality of subcarriers; a controller configured to control the modulation format for the modulator so as to use a first modulation format and a second modulation format for two or more subcarriers among the plurality of subcarriers and include subcarriers that are different in at least one of a first timing and a second timing of the first modulation format; and a multiplexer configured to multiplex signals modulated by the plurality of modulators.


In duplicate data removal, a processing load on a transmission-side apparatus is reduced. A reception-side apparatus includes a first storage unit that stores first data which has been received, a duplication detection unit that determines whether or not data duplicating at least a part of received data from a transmission-side apparatus is stored in the first storage unit, and a notification unit that, when data duplicating at least a part of the received data is stored in the first storage unit, notifies the transmission-side apparatus of prediction information on duplicate reception of the first data, and the transmission-side apparatus includes a second storage unit that stores the first data which has been transmitted, a determination unit that, when the prediction information is received from the reception-side apparatus, compares transmission scheduled data and a part of the first data based on the prediction information on duplicate reception, and determines whether or not there is a part of the first data in the second storage unit, the part matching the transmission scheduled data, and a transmission unit that, when there is a part of the first data, the part matching the transmission scheduled data, in the second storage unit, transmits outline information on the transmission scheduled data instead of the transmission scheduled data.


Patent
Fujitsu Limited | Date: 2017-07-12

A radio communication anomaly detecting method includes: gathering and storing different kinds of parameters indicating a radio quality with a sensor node in a storage unit; classifying parameter sets, each containing specific kinds of parameters gathered during a prescribed time period among the stored parameters, into clusters; estimating that a rapid radio quality degradation has occurred during the prescribed time period when there is a cluster of which all average values of specified kinds of parameters among the different kinds of parameters degrade more than those of another cluster; and performing a trend analysis for a time period during which it is not estimated that the rapid radio quality degradation has occurred to determine whether each of the different kinds of parameters gathered during the time period exhibits a trend of degradation, and estimating that a slow radio quality degradation has occurred based on a result of the trend analysis.


Patent
Fujitsu Limited | Date: 2017-07-12

When a refrigerant amount balance control is executed, in indoor units (5a) and (5b) where the refrigerant supercooling degree is lower than an average refrigerant supercooling degree, the refrigerant pressure on a downstream side of indoor expansion valves (52a) and (52b) decreases since the degrees of opening of the indoor expansion valves (52a) and (52b) are decreased. On the other hand, in an indoor unit (5c) where the refrigerant supercooling degree is higher than the average refrigerant supercooling degree, although the degrees of opening of the indoor expansion valves (52a) and (52b) are made high, the refrigerant pressure on the downstream side of the indoor expansion valves (52a) and (52b) decreases and this decreases the refrigerant pressure on the downstream side of the indoor expansion valve (52c), so that the difference in pressure between on the upstream side and on the downstream side of the indoor expansion valve (52c) increases and the liquid refrigerant staying at an indoor heat exchanger (51c) of the indoor unit (5c) consequently flows out into a liquid pipe (8). Thereby, the heating ability of the indoor unit (5c) increases.

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