Hitachi, Ltd.

Hitachi Communication Technologies, Ltd.

Fujitsu Hitachi Plasma Display Limited

Other

Yusuke Yajima

Tohru Kazawa

Hiroyuki Shinada

Katsuhiro Kuroda

Masaki Ohira

Mari Nozoe

Atsuko Takafuji

Akihiko Tsuchiya

Yasutsugu Usami

Katsuya Sugiyama

Masahiko Mizutani

Norihiro Sakamoto

Kanji Tsujii

Shunji Maeda

Yutaka Kaneko

Maki Tanaka

Takashi Hiroi

Hitoshi Kubota

Haruo Yoda

Aritoshi Sugimoto

Seiichi Murayama

Kimiaki Ando

Kazushi Yoshimura

Hiroshi Tooyama

Tadao Ino

Yoshimi Kawanami

Masayuki Shibata

Kenichirou Kawakami

Yoshihiro Ashi

Kaoru Umemura

Yoshio Takahashi

Hisaya Murakoshi

Masaki Hasegawa

Masatoshi Shibasaki

Masakazu Ichikawa

Shigeyasu Kubo

Kazuhiro Matsuya

Keizo Suzuki

Toshiki Sugawara

Hiroshi Kajiyama

Takashi Mori

Norihiro Uemura

Koji Ohira

Ikuo Ozaki

Yoshinobu Morita

Masayuki Takase

Hiroki Ikeda

Masatoshi Takeshita

Shigeyuki Hosoki

Taisuke Ueta

Toshiyuki Nanto

Takayuki Kanno

Shinji Kanagu

Yasuhiko Kunii

Kenichi Yamamoto

Takeshi Yasuda

Akihiro Fujimoto

Yasuhiro Wakabayashi

Atsushi Yokoyama

Hayato Hoshihara

Masaki Oohira

Ryo Suzuki

Toshio Kobayashi

Hideo Saito

Hiroshi Suzuki

Nobuyuki Yamamoto

Yasuhiro Mitsui

Yasuo Wada

Tsuyoshi Hasegawa

Mikio Ichihashi

Toshio Katsuyama

Ken'etsu Yokogawa

Hiroyuki Maeda

Masatoshi Takihiro

Keiji Usuba

Hidekazu Okuhira

Akira Shintani

Makiko Kohno

Masao Niibe

Taishi Shinagawa

Takeshi Kiyose

Yoshimi Nakagawa

Satoko Araki

Takuya Maruizumi

Toshihiro Ashi

Masato Nakajima

Megumi Sakai

Hisashi Uehara

Yoshihito Doi

Production past record information showing the execution time point of each step is accumulated for each product loaded in a production system. A supporting system calculates, for each step, a retention increase rate at each time point on the basis of the production past record information. The 'retention increase rate' is an amount of increase in retention number per unit time. The supporting system displays a holistic chart for a production situation, which has a time axis and a step axis (axis perpendicular to the time axis and corresponding to steps). A display mode of each position in the holistic chart depends on whether a retention increase rate for the time point and step corresponding to the position is a negative value, zero, or a positive value, and a difference between the retention increase rate and a rate reference value (a reference value for the retention increase rate).

System and method for supporting production management

Regardless of the production method applied, it is possible for a user to estimate a factor that causes trouble in one of the resources belonging to a resource type. A supporting system refers to management information indicating a production past record of the production system, and displays an overlay chart in which a diagram chart is relatively superimposed on a Gantt chart. The Gantt chart is a chart for a first resource type and has a resource axis and a time axis. The diagram chart is for a second resource type. In the overlay chart, a polygonal line connecting a plurality of points corresponding to a second resource, belonging to the second resource type, is on the Gantt chart, and each point is plotted at a position corresponding to an execution time of a step and a first resource, belonging to the first resource type, related to the step.

The production management support system analyzes, on the basis of one or more attentional perspectives on a plurality of different models of products, past record information that includes information as a past record which shows, for each product loaded in a production system in which the plurality of different models of products are loaded and a sequential order of two or more of a plurality of steps is different depending on the model, an execution time of each of the steps and that serves as a basis for a production management chart showing a production situation, to detect, among display objects displayed in the production management chart, a display object satisfying one or more requirements associated with the one or more attentional perspectives. The system performs accentuated display on at least one of the detected display objects.

As a plurality of resource types relating to production, there are two or more resource types including Money from among resource types of Man, Machine, Material, and Money. Execution past record information indicates, for each of one or more resource types other than Money and for each resource belonging to the resource type, a step performed on the resource and an execution time block of the step. Expense information indicates, for at least one of the above-mentioned one or more resource types and for each resource belonging to the resource type, an expense relating to the resource. The system displays a cost chart based on the result of the cost calculation process. The cost chart shows costs in management unit same as or different from those of the steps, and has a time axis and a management unit axis (axis perpendicular to the time axis).

A support system displays, on the basis of management information as a past record which shows, for each product loaded in a production system in which a plurality of different models of products are loaded and a sequential order of two or more of a plurality of steps is different depending on the model, an execution time of each of the steps, at least one of a first holistic chart (having a time axis and showing a feature value of production situation of the product during a display target period on a per predetermined unit basis) and a second holistic chart (showing a relationship between a plurality of steps with respect to a flow of a plurality of models of products). The support system selects at least one of a model and a step for one of the holistic charts, and displays step element information.

In an exemplary communication apparatus, an assignment module determines whether processing for a second packet assigned the flow ID associated with a received first packet is being executed. The assignment module determines a parallel processing module to execute processing for the first packet and a parameter to be included in a notice of assignment. The determined parallel processing module acquires a result of execution of the processing for the second packet from the computation table or the result of execution of the processing held in the parallel processing module according to the received notice of assignment. The determined parallel processing module executes the processing for the first packet using the result of execution of the processing for the second packet and the information included in the notice of assignment, and updates a computation table with a result of execution of the processing for the first packet.

Communication apparatus and communication method

A communication device includes a flow identification unit specifying a user corresponding to received data, a bandwidth control unit controlling transmission of the received data so as not to exceed a bandwidth corresponding to the selected communication path in two bandwidths allocated to the specified user, and a label addition unit adding the label value corresponding to the selected communication path to the data received from the bandwidth control unit and transmitting the data. The label addition unit executes, upon detecting a trigger for a change in the selection of the communication path, changing the selection of the label value and transmitting a feedback signal for giving notice of the change in the selection of the communication path to the bandwidth control unit in a given order. The bandwidth control unit executes a process of changing the setup of the bandwidth on the basis of the received feedback signal.

Communication device, method for controlling the communication device, and communication system

Provided is a passive optical network system for operating a mixture of PONs with differing transmission speeds and is capable of reducing power consumption on the basis of the amount of signals being transmitted. The master station of the passive optical network system, which determines the amount and timing of signals sent thereto by each of a plurality of slave stations on the basis of the requests of the plurality of slave stations and receives signals from the plurality of slave stations via an optical fiber network, is equipped with a control unit that determines in each set cycle the amount, transmission timing, and transmission speed of the signals that each slave station is permitted to transmit to said master station on the basis of the amount of signals that each of the plurality of slave stations has requested to transmit, and that notifies such to each slave station. Additionally, each of the plurality of slave stations is equipped with a control unit that transmits signals to the master station at a first transmission speed or a second transmission speed that is faster than the first transmission speed, and is configured to transmit signals with either the first transmission speed or the second transmission speed on the basis of notifications from the master station.

Passive optical network system and operating method thereof

Switching process at the occurrence of a path trouble is performed more quickly to reduce the number of packet discards during a traffic transition from a currently used system path to a standby system path within a section to be protected. An OLT (-W) refers to the DBA information of a PON section and, if receiving no CCM frame at a timing at which the same should be received, then determines that some trouble has occurred on the path (S) and transmits, to an OAM-compliant NE (-Z), an application-for-switching frame () to notify the OAM-compliant NE (-Z) of the abnormal condition. The OAM-compliant NE (-Z) monitors the occurrence of the trouble within the PON section nearly in real time, starts a switching process (S) and generates and transmits a standby-system delivery request () (SS). An OAM-compliant NE (-A) switches the communication path to the standby-system passing through an OLT (-P).

Communication system, subscriber accommodating apparatus and communication method

A passive optical network system such that the power consumption can be reduced as much as possible according to the end-user traffic. An OLT uses the DBA function thereof and sequentially uses frequencies in ascending order of transmission rate in order to sequentially allocate bands to ONUs in ascending order of the requested bandwidth. At this time, a frequency to be allocated is selected so that the bandwidth allocated to each ONU is narrower than a maximum bandwidth through which transmission using the allocated wavelength is enabled. An OLT uses a grant area to specify the transmission timing of the secondary station and to inform the specified transmission timing to the secondary station. In addition, an area is set for storing information used to inform the secondary station of a new frequency to be used.

Optical multiplexing terminating device, passive optical network system and method for allocating wavelength

In a light reception element such as an APD (Avalanche Photo Diode) used for receiving a high-speed and weak optical signal, it is possible to prevent the phenomenon of distortion of a signal inputted after a large-level light is received. A PON (Passive Optical Network) system includes an OLT (Optical Line Terminal) which can impartially and effectively transmit light reception data to each ONU (Optical Network Unit). According to a light reception amplitude received by each ONU, an inter-frame gap of an appropriate length is assigned for each ONU. The OLT includes a unit for measuring and accumulating the reception light amplitude and data on the inter-frame gap of an appropriate length decided in advance according to the characteristic of the light reception device and generates a grant value for assuring an inter-frame gap of an appropriate length by using the both information.

Apparatus of adjusting optical signal transmission timing

There are provided multiple candidates for FEC codes selectable for each of the ONTs. An OLT is provided with: means for storing redundancy and a code length of each FEC code in a table; means for selecting an FEC code; means for encoding or decoding data using the selected FEC code; means for calculating a bandwidth in consideration for the FEC redundancy and the code length with reference to the table during band assignment calculation; and means for notifying the destination ONT of the selected FEC code.

Optical access system

In the configuration of an optical communication system interconnecting a parent station and a plurality of child stations via an optical fiber network equipped with an optical splitter, RE is provided having a measuring unit for measuring a transmission distance or time to a child station, a determining unit for determining a timing when a child station transmits a signal, in accordance with a transmission bandwidth request from the child station, and a signal processing unit for processing a signal received from a child station and transmitting the processed signal to the parent station. When a burst signal is received from each child station at the determined timing, a portion of the header of the burst signal is deleted, and a dummy signal is inserted into the deleted area and a gap area between received burst signals to convert the burst signals into a series of signals to be sent to the parent station.

Optical passive network system and its operation method

Communication arrangements wherein each of ONUs of a first or second PON transmits data toward a connected first or second OLT after a wait time period designated by the connected first or second OLT; the first communication device of the first packet communication network sends a first frame for measuring communication time period, to the second communication device of the second packet communication network through the first PON, and sends a second frame for measuring communication time period, to the second communication device through the second PON; and the second communication device calculates a difference of communication time period between the received first and second frames, and instructs the first or second OLT of the first or second PON, for correcting a wait time period which is set to the one or plural ONUs connected to the first or second OLT, based on the difference between communication time periods.

Communication system and communication apparatus

In order to be able to moderate the inclination of the PON burst reception characteristics and to improve the FEC effect, a first offset is used in a ranging window field, and a second offset, which is lower than the first offset value, is used in a burst data field other than the ranging window field.

Passive optical network system and optical line terminal

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Fujisawa, Japan

Yusuke Yajima