Oki Electric Industry Co., Ltd.

Other

Fujitsu Corporation

Aichi Sangyo, Co., Ltd.

Canon Kabushiki Kaisha

Matsushita Electric Industrial Co., Ltd.

Nippon Steel Corporation

Kddi Corporation

Semiconductor Process Laboratory Co., Ltd.

Canon Sales Co., Inc.

Toshio Kato

Manabu Kawabe

Takuro Sato

Kiyoki Sekine

Noboru Tokumasu

Atsushi Fukasawa

Shoichi Miyamoto

Hiroshi Imaizumi

Hideaki Nakashima

Takao Kinoshita

Shinichi Sato

Atsushi Shimbo

Hiroyuki Yokoyama

Akihiko Tojo

Masatoshi Watanabe

Hajime Nakamura

Kiyohito Tokuda

Taizo Oku

Takayoshi Azumi

Hiroyuki Fukuoka

Akiyoshi Kawahashi

Masato Tsuji

Makoto Kurotobi

Ikuo Kawasumi

Hiroki Furuya

Yasuo Murakami

Hideki Kashimura

Kiichi Katayama

Junji Uehara

Power control of a base station of a CDMA system that includes a plurality of communication terminals and a maintenance terminal is optimized by adjusting one of transmitted power and received power of the base station, based on power distribution values of radio channels used in radio communications, the power distribution values being obtained by counting the number of the radio channels corresponding to each of the transmitted power levels and the received power levels of the base station.

Code division multiple access communication system, and a base station control device and a base station thereof

This invention relates to base station control equipment, radio base station equipment and radio terminal equipment that together constitute a mobile communication system. These base station control equipment, radio base station equipment and radio terminal equipment of this invention update transmitting power of a radio channel allotted to a new visit-zone to a greater and suitable value in time sequence. Therefore, mobile communication system according to the invention can keep speech quality of a completed call and transmission quality at high levels, can improve the number of radio channels that can be formed in parallel in a common frequency band (system capacity) or an information content of information that can be transmitted in parallel with desired transmission quality, and can improve utilization efficiency of a radio frequency.

Base station control equipment, radio base station equipment, radio terminal equipment, and mobile communication system

A routing control method in an optical packet switching network including a plurality of optical packet switches. Each optical packet switch has a plurality of output ports used for sending packets to other optical packet switches, respectively. The method particularly includes a step of, in a one optical packet switch, monitoring congestion conditions at its output ports, a step of, in the one optical packet switch, transferring packets to be stored in a one output port that is judged in the monitoring step as in congestion, to other output port that is judged in the monitoring step as not in congestion, a step of, from the one optical packet switch, sending the packets as reflection packets via the other output port to an other optical packet switch corresponding to the other output port, and a step of, from the other optical packet switch, returning the reflection packets to the one optical packet switch.

Reflection routing method in optical packet switching network and optical packet switch for reflection routing

A wireless transmitter transmits data with at least two different levels of required quality on the same wireless channel. The transmitter has a multiplexer that multiplexes the data into frames, each frame containing data with at least two different levels of required quality, and a power controller that controls the transmitting power of each type of data separately within each frame, thereby avoiding the use of excess transmitting power.

Wireless transmitter with power control based on data type

A to-be-sent signal ( ) is comprised of a header ( ) and convolution encoded data ( ). An error correcting code ( ) has a capability to correct a bit error or burst error contained in an objective data ( ) placed apart from the header ( ) in said convolution encoded data ( ). Because an error arises easily in data placed apart from a header compared with that positioned near said header generally, said error correcting code ( ) is added to data placed apart from said header and the addition of said error correcting code is omitted in data placed near to said header, thereby reducing whole information contents and transmission power.

Method of mobile telecommunications

There has been such a drawback that it is difficult to accurately estimate the location of mobile station MS in a mobile communication system. To solve the problem, according to the mobile communication system of the present invention, a mobile station and several base station cooperate for estimation. First the base stations BS in which the mobile station is laid and other base stations adjacent thereto each measure the receipt levels of the radio wave radiated by the mobile station to notify the position manage center of the receipt levels. Second the position manage center instructs the mobile station to control the radio wave pursuant to the receipt levels in such a fashion the receipt levels are stabilized; finally. Third each base station measure the distance between the base station and the mobile station based upon the propagation time of the radio wave to inform the position manage center of the distance. Finally, the position manage center estimates the location of the mobile station based upon a point or several points given by the circles defined using the distances.

System and method for estimating location of mobile station

A method for forming an interlayer insulating film includes the steps of: forming a metal film on a substrate; forming a first insulating film on the metal film; patterning the first insulating film by selectively etching the first insulating film; patterning the metal film by etching the metal film using the patterned first insulating film as a mask; forming an overhang portion of the first insulating film on the metal film by selectively etching a side portion of the metal film; and forming a second insulating film on the entire structure.

Method for forming an interlayer insulating film, and semiconductor device

A method of cleaning a substrate is provided which can remove contamination after treatment of a substrate surface by use of chemicals etc. prior to film formation. The method of cleaning the substrate surface uses of a vapor of chlorosulfonic acid (SO Cl(OH)).

Method of cleaning substrate and method of manufacturing semiconductor device

There is provided a semiconductor device manufacturing system capable of carrying out resist stripping or surface pre-treatment of a substrate by use of a gas such as chlorosulfuric acid with high reactivity The manufacturing system comprises a process vessel,formed integrally of a process chamber,for treating respective surfaces of substrates,with a chemical vapor and a chemical storage chamber,for storing chemical for generating the chemical vapor, and a chemical heating means,for heating the chemicals stored in the chemical storage chamber,to evaporation.

Semiconductor device manufacturing system

A transmission device performs encoding by a speech encoding portion including a speech encoder and error correction encoder, and transmits a continuous signal without any further processing. A reception device receives the continuous signal and performs channel decoding and speech decoding as one unit by a speech decoding portion including a soft-decision error correction decoder and a soft-decision speech decoder. Thus, a transmission and reception system performs an accurate signal reproduction without removing the signal including a normal bit error rate by correcting the error by the speech decoder.

Speech transmission and reception system for digital communication

This invention concerns a method for the removal of a resist film containing phosphorus (P) or boron (B) or other inorganic element. Specifically, a resist film 42 formed on a substrate 41 is exposed to the liquid or gas of chlorosulfonic acid �SO.sub.2 Cl(OH)! and caused to react with the acid and, consequently, is enabled to be removed from the substrate 41.

Method for removal of resist film and method for production of

A spreading code generator generates a spreading code by modulo-two addition of two internal spreading codes. The first internal spreading code is part of a pseudorandom noise sequence, created by resetting a pseudorandom noise generator to an assigned initial state at intervals determined by counting a framing signal. The second spreading code is selected from a set of preferably orthogonal sequences, the selected sequence being repeated at intervals shorter than the period of the framing signal. A code-division multiple-access communication system employs this spreading code generator to generate all spreading codes used at all communicating stations. One of the spreading codes generated at each station is transmitted as a synchronization signal.

Spreading code generator and CDMA communication system

A transmission device is disclosed in which user data are cross converted, at their base band, by the orthogonal transformers 31.about.34. Signaling data are collected at every integer which does not exceed the ratio of the user data to the signaling data and time division-like multiplexed by the multiplexer 20. The multiplexed data are crossly converted, at its base band, by the orthogonal transformer 35. The base band data cross converted by the orthogonal transformers 31.about.35 are added by the adder 40 and carrier modulated so as to be radio transmitted from the antenna 60.

CDMA communications system using multiplexed signaling data lines

A semi-automatic TIG welding apparatus including a torch handle, a wire-feeding curved nozzle which is disposed within the torch handle and is curved at a point slightly extended from the torch handle, and a TIG torch supporting arm which is fixed to a TIG torch having a shielding gas hose and center gas hose. An inside portion of the TIG torch supporting arm is formed of an electroconductive material. The apparatus further includes water-cooling welding cable hoses which are attached to a water tank, extend through the inner side of the torch handle, and are attached to the TIG torch. The water-cooling welding cable hoses being formed with electroconductive cables provided therein. The apparatus may additionally include a TIG torch rotation block which is rotatably mounted to the wire-feeding curved nozzle and fixed to the TIG torch supporting arm. Thus, a semi-automatic TIG welding apparatus is provided wherein a TIG welder can freely adjust the position of the welding wire, and wherein the welding wire can be inserted to an ideal position, and also wherein the wire-feeding curved nozzle and thus the wire do not fluctuate in position, resulting in great savings in the expense and time related to TIG welding, and also in the amount of labor on the part of the welder.

Semi-automatic TIG welding apparatus

To initiate communication, a first station generates a synchronization signal and sends the synchronization signal to a second station. When the second station detects the synchronization signal, the second station acquires synchronization and sends a synchronization-acquisition message back to the first station. The first station now reduces the power of the synchronization signal, while continuing to send the synchronization signal, and also begins sending a modulated data signal. The second station uses the synchronization signal to maintain synchronization for demodulating the data signal.

Growing community of inventors

Tokyo, Japan

Toshio Kato