Patents by Inventor Akio Aoyama
Akio Aoyama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7844698Abstract: A wireless network change support system includes a change setting section, an income prediction section and an expense calculation section. The change setting section sets a change data for changing a setting data based on a status data indicating a status of a wireless network with wireless base stations and said setting data indicating a setting of said wireless network. The income prediction section calculates a prediction income in said wireless network when said setting data is changed, based on said status data, said setting data and said change data. The expense calculation section calculates a prediction expense necessary to execute a change of said wireless network as indicated in said change data based on said change data.Type: GrantFiled: June 10, 2004Date of Patent: November 30, 2010Assignee: NEC CorporationInventors: Akio Aoyama, Kojiro Hamabe
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Publication number: 20100188997Abstract: In a throughput estimation method for estimating throughput of a first channel in a cellular system in which the first channel and a second channel that are used for an uplink wireless communication service in a cell, noise rise of the second channel is calculated from the traffic volume of the second channel, the noise rise and a target RTWP that is the target total reception power of the base station that is set in the base station are used to calculate a ratio of resources used for the wireless communication service that can be allocated to the first channel, and the resource ratio is then used to calculate the throughput of the first channel.Type: ApplicationFiled: May 9, 2008Publication date: July 29, 2010Applicant: NEC CorporatonInventors: Akio Aoyama, Kojiro Hamabe
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Publication number: 20100105372Abstract: A method for deciding radio parameters that improve a value indicative of the communication service quality of an important area in a wireless communication system. The constitution of the present invention comprises a second step of deciding a second radio parameter, based on the first radio parameter and the weighted sum of the values indicative of the communication service qualities in first and second ones, to which a first weight value is applied, of areas in which a plurality of radio base stations are located; a third step of accepting the constraints related to the foregoing weighted sum; and a fourth step of deciding a third radio parameter, based on the second radio parameter, the constraints accepted in the third step, and the weighted sum of the values indicative of the service qualities in the first and second areas to which a second weight value, different from the first weight value, is applied.Type: ApplicationFiled: May 26, 2006Publication date: April 29, 2010Inventors: Akio Aoyama, Koujirou Hamabe
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Patent number: 7697474Abstract: A system is provided for estimating the geographical distribution of user throughput in a cellular system, including user terminals and a base station for effecting wireless packet communications with user terminals inside in its own cell using a shared channel. Reception quality estimating means (11) estimates the reception quality of the shared channel at the location of a user terminal in the cell. Traffic information reading means (12) reads the traffic information on the estimation target area in which estimation of the reception quality was performed. User throughput estimating means (13) estimates the user throughput at the location of a user terminal in the cell, using the user throughput calculating function that receives as its input the reception quality of the shared channel at the location of the user terminal in the cell and the traffic information on the estimation target area and calculates user throughput.Type: GrantFiled: November 17, 2005Date of Patent: April 13, 2010Assignee: NEC CorporationInventors: Akio Aoyama, Kojiro Hamabe
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Publication number: 20100035569Abstract: A received electric field intensity estimates device estimates a received electric field intensity when a signal is received, by using at least a gain in a transmitting direction indicating the direction of the receiver viewed from a transmitter's side from among gains in the individual directions of the antenna's directive pattern of a transmitter's antenna, and outputs the estimated intensity. The device includes an averaging unit for averaging gains in the individual directions of the antenna's directive pattern within an angular range of an arrival wave angle indicating the direction of the signal arriving at the receiver, taken as the relevant direction; and a received electric field intensity calculation unit using at least the gain in the transmitting direction from among gains in the individual directions of the antenna's averaged directive pattern, and for outputting the result of the calculation as the estimated received electric field intensity.Type: ApplicationFiled: November 15, 2007Publication date: February 11, 2010Applicant: NEC CorporationInventor: Akio Aoyama
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Patent number: 7519352Abstract: A wireless communication network can reliably deliver high priority broadcast information from base stations to mobile terminals located deep in building and those located in scarcely populated areas that are remote from the base stations. Each of the base stations of the wireless communication network comprises a broadcast information input unit for receiving high priority broadcast information and a transmission power changing unit for changing the transmission power of the downlink common channel when high priority broadcast information is input to it. As broadcast information is input, the transmission power changing unit changes the transmission power of the downlink common channel so as to boost the effective radiation power used by the downlink common channel of the base station at places in the coverage of the base station that are subjected to a propagation loss.Type: GrantFiled: June 27, 2006Date of Patent: April 14, 2009Assignee: NEC CorporationInventor: Akio Aoyama
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Publication number: 20090088171Abstract: Disclosed is a technology for easy balancing between cells by securing a cell balance, using an optimization process adopting a radio parameter as a parameter of an objective function. Objective function extractor 11 sets up optimizing condition at least including an objective function that has a radio parameter of a base station as the objective function parameter and is used for an optimization process to balance traffic loads between cells, using cell balance values between a target cell whose characteristic changes by modification of the parameter and neighboring cells existing around the target cell. Optimizer 12 performs an optimization process in accordance with the optimizing condition set by objective function extractor 11 to determine the value of the parameter to be the solution.Type: ApplicationFiled: October 25, 2006Publication date: April 2, 2009Inventors: Akio Aoyama, Koujirou Hamabe
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Publication number: 20090003236Abstract: A system is provided for estimating the geographical distribution of user throughput in a cellular system, including user terminals and a base station for effecting wireless packet communications with user terminals inside in its own cell using a shared channel. Reception quality estimating means (11) estimates the reception quality of the shared channel at the location of a user terminal in the cell. Traffic information reading means (12) reads the traffic information on the estimation target area in which estimation of the reception quality was performed. User throughput estimating means (13) estimates the user throughput at the location of a user terminal in the cell, using the user throughput calculating function that receives as its input the reception quality of the shared channel at the location of the user terminal in the cell and the traffic information on the estimation target area and calculates user throughput.Type: ApplicationFiled: November 17, 2005Publication date: January 1, 2009Applicant: NEC CORPORATIONInventors: Akio Aoyama, Kojiro Hamabe
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Patent number: 7352798Abstract: A switching circuit (112) is controlled by an in-slot interface-noise-power-control output circuit (115) to output an in-slot interface noise power (107-n) to a past-slot interference-noise-power memory (110), if there is no estimated value for an interference noise power of finger n of one slot before. If the interference noise power of the one slot before is not estimated and yet there exists an interference noise power which has been once estimated, the past-slot interference-noise-power memory (110) stores therein an interference noise power in a last slot which has been valid. An inter-slot averaging processing is performed between the interference noise power (111-n) from the past-slot interference-noise-power memory (110) and an estimated value (107-n) for the interference noise power in the current slot.Type: GrantFiled: June 6, 2003Date of Patent: April 1, 2008Assignee: NEC CorporationInventors: Satoshi Oura, Akio Aoyama
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Patent number: 7218955Abstract: The purpose of the present invention is to provide a tilt angle deciding method and a system wherein tilt angles to diminish the deterioration rate of the entire system can be obtained in the radio communication system. The method comprises the steps of setting initial values of tilt angles; calculating the deterioration rate at the initial values of tilt angles; selecting an antenna for reducing a tilt angle; reducing the tilt angle of the selected antenna; calculating a deterioration rate at the time when the tilt angle is reduced; determining the continuity of repeating the processes, after repeating the series of processes for reducing these tilt angles, and increasing tilt angles repeatedly in the similar way. In addition, the method comprises the steps of outputting tilt angles for diminishing a small deterioration rate, and determining whether the processes of repeating the whole steps finish.Type: GrantFiled: August 4, 2004Date of Patent: May 15, 2007Assignee: NEC CorporationInventors: Akio Aoyama, Kojiro Hamabe
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Publication number: 20060293043Abstract: A wireless communication network can reliably deliver high priority broadcast information from base stations to mobile terminals located deep in building and those located in scarcely populated areas that are remote from the base stations. Each of the base stations of the wireless communication network comprises a broadcast information input unit for receiving high priority broadcast information and a transmission power changing unit for changing the transmission power of the downlink common channel when high priority broadcast information is input to it. As broadcast information is input, the transmission power changing unit changes the transmission power of the downlink common channel so as to boost the effective radiation power used by the downlink common channel of the base station at places in the coverage of the base station that are subjected to a propagation loss.Type: ApplicationFiled: June 27, 2006Publication date: December 28, 2006Applicant: NEC CorporationInventor: Akio Aoyama
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Patent number: 7077986Abstract: Objects of the present invention are to provide a method for molding polymers to be able to mold products each of which has an outer shape transferred accurately from the shape of the inside of a mold, exhibits high dimensional accuracy and is uniform in the thickness of its surface skin layer and the expansion ratio in its foamed inside. A molten polymer 60 is injected into a cavity 30 and simultaneously gas is pressed to the inside of the molten polymer 60 to contact the polymer close to the surface of the mold, and then gas is exhausted while maintaining the shape inside the mold, to thereby mold a polymer formed product in which a surface skin layer 61 and a foamed inside 62 having cushioning property are formed in one piece.Type: GrantFiled: September 27, 2001Date of Patent: July 18, 2006Assignee: JSR CorporationInventors: Fumio Kurihara, Junji Koujina, Akihiko Morikawa, Akio Aoyama, Masaki Maeda
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Patent number: 7047022Abstract: A mobile terminal has a neighboring mobile terminal communication unit for communicating with a neighboring mobile terminal existing near the mobile terminal for acquiring position information on the neighboring mobile terminal, and a position information calculation unit for calculating position information of the mobile terminal based on the position information acquired from the neighboring mobile terminal when such position information is available.Type: GrantFiled: November 2, 2001Date of Patent: May 16, 2006Assignee: NEC CorporationInventor: Akio Aoyama
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Publication number: 20060083366Abstract: A wireless network change support system includes a change setting section, an income prediction section and an expense calculation section. The change setting section sets a change data for changing a setting data based on a status data indicating a status of a wireless network with wireless base stations and said setting data indicating a setting of said wireless network. The income prediction section calculates a prediction income in said wireless network when said setting data is changed, based on said status data, said setting data and said change data. The expense calculation section calculates a prediction expense necessary to execute a change of said wireless network as indicated in said change data based on said change data.Type: ApplicationFiled: June 10, 2004Publication date: April 20, 2006Applicant: NEC CORPORATIONInventors: Akio Aoyama, Kojiro Hamabe
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Publication number: 20050254607Abstract: A switching circuit (112) is controlled by an in-slot interface-noise-power-control output circuit (115) to output an in-slot interface noise power (107-n) to a past-slot interference-noise-power memory (110), if there is no estimated value for an interference noise power of finger n of one slot before. If the interference noise power of the one slot before is not estimated and yet there exists an interference noise power which has been once estimated, the past-slot interference-noise-power memory (110) stores therein an interference noise power in a last slot which has been valid. An inter-slot averaging processing is performed between the interference noise power (111-n) from the past-slot interference-noise-power memory (110) and an estimated value (107-n) for the interference noise power in the current slot.Type: ApplicationFiled: June 6, 2003Publication date: November 17, 2005Applicant: NEC CorporationInventors: Satoshi Oura, Akio Aoyama
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Publication number: 20050250542Abstract: The purpose of the present invention is to provide a tilt angle deciding method and a system wherein tilt angles to diminish the deterioration rate of the entire system can be obtained in the radio communication system. The method comprises the steps of setting initial values of tilt angles; calculating the deterioration rate at the initial values of tilt angles; selecting an antenna for reducing a tilt angle; reducing the tilt angle of the selected antenna; calculating a deterioration rate at the time when the tilt angle is reduced; determining the continuity of repeating the processes, after repeating the series of processes for reducing these tilt angles, and increasing tilt angles repeatedly in the similar way. In addition, the method comprises the steps of outputting tilt angles for diminishing a small deterioration rate, and determining whether the processes of repeating the whole steps finish.Type: ApplicationFiled: August 4, 2004Publication date: November 10, 2005Inventors: Akio Aoyama, Kojiro Hamabe
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Publication number: 20040097237Abstract: There are disclosed a method of and a system for collecting information related to operation of a radio communication system inexpensively and easily. A mobile radio terminal monitors a communication status of user communication, and detects as a trigger when the communication status has satisfied a predetermined condition. When a trigger is detected, the mobile radio terminal acquires a reception status of a radio signal and the position of the mobile radio terminal. The mobile radio terminal sends measured information including the reception status and the position to an information collecting server. The information collecting server receives the measured information from the mobile radio terminal and records therein the measured information which has been received.Type: ApplicationFiled: November 5, 2003Publication date: May 20, 2004Applicant: NEC CorporationInventor: Akio Aoyama
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Publication number: 20030168767Abstract: Objects of the present invention are to provide a method for molding polymers to be able to mold products each of which has an outer shape transferred accurately from the shape of the inside of a mold, exhibits high dimensional accuracy and is uniform in the thickness of its surface skin layer and the expansion ratio in its foamed inside.Type: ApplicationFiled: March 31, 2003Publication date: September 11, 2003Inventors: Fumio Kurihara, Junji Koujina, Akihiko Morikawa, Akio Aoyama, Masaki Maeda
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Publication number: 20020055362Abstract: A mobile terminal has a neighboring mobile terminal communication unit for communicating with a neighboring mobile terminal existing near the mobile terminal for acquiring position information on the neighboring mobile terminal, and a position information calculation unit for calculating position information of the mobile terminal based on the position information acquired from the neighboring mobile terminal when such position information is available.Type: ApplicationFiled: November 2, 2001Publication date: May 9, 2002Applicant: NEC CORPORATIONInventor: Akio Aoyama
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Patent number: 6282229Abstract: To synchronize spread spectrum (SS) signal with PN sequence, even when a Doppler frequency of fading is low. Delay profile combining means outputs a combined delay profile from delay profiles which are outputted from receiving units. Further, the synch chip timing which is obtained from the combined delay profile is fed commonly to receiving units for path diversity combining.Type: GrantFiled: June 14, 1999Date of Patent: August 28, 2001Assignee: NEC CorporationInventor: Akio Aoyama