Patents by Inventor Ha Nguyen Tran
Ha Nguyen Tran 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: 9253716Abstract: A technique that can effectively utilize unused wireless link and realize high-quality wireless communication between a communication terminal and a base station and enables efficient distribution of radio resources over an entire wireless communication system is provided. A wireless communication system in which a base station and a communication terminal can conduct wireless communication by detecting a usable wireless link and changing a wireless link used for the connection is also provided. On the communication network side, in addition to a plurality of wireless communication networks and a base station, a server device is provided.Type: GrantFiled: December 1, 2009Date of Patent: February 2, 2016Assignee: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGYInventors: Kentaro Ishizu, Homare Murakami, Goh Miyamoto, Ha Nguyen Tran, Stanislav Filin, Hiroshi Harada
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Patent number: 9049648Abstract: Object: To provide a mechanism and a function of a system that can determine a communication method and the like effectively utilizing frequency resources, considering priority of each communication, in a cognitive communication network system of a frequency shared type or the like assuming that a given frequency band is shared by a plurality of systems in use.Type: GrantFiled: September 24, 2010Date of Patent: June 2, 2015Assignee: National Institute of Information and Communications TechnologyInventors: Kentaro Ishizu, Homare Murakami, Goh Miyamoto, Ha Nguyen Tran, Stanislav Filin, Chen Sun, Yohannes Alemseged Demessie, Hiroshi Harada
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Patent number: 8917685Abstract: Disclosed is a wireless communication system and the like that can avoid interference even if a plurality of networks coexist. The wireless communication system includes a primary user, cluster head equipment, and a secondary user. The cluster head equipment is for providing a local area network to a cluster region containing the abovementioned primary user. Also, the cluster head equipment contains: an acquisition means that acquires one or both—of information regarding the primary user and information regarding a primary signal—and the like; and a transmission means that transmits information to the secondary user. Then, using this wireless communication system, the secondary user performs cognitive wireless communication or the like on the basis of the information received from the transmission means of the cluster head equipment.Type: GrantFiled: March 15, 2011Date of Patent: December 23, 2014Assignee: National Institute Of Information And Communications TechnologyInventors: Gabriel Porto Villardi, Chen Sun, Yohannes Alemseged Demessie, Ha Nguyen Tran, Hiroshi Harada
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Patent number: 8874152Abstract: Disclosed is a wireless communication system capable of avoiding interference even when a network including a secondary user coexists. The wireless communication system includes a primary user belonging to a first network, a first secondary user belonging to a second network, and a coexistence manager (CM). The coexistence manager (CM) acquires information relating to spectrum holes that are, at least temporarily, not in use by the primary user. In addition, the coexistence manager (CM) determines whether or not usage of the spectrum holes by the first secondary user causes interference. If the determination result is that interference is caused, coexistence manager (CM) notifies to this effect a second secondary user belonging to a third network, which differs from the second network.Type: GrantFiled: February 22, 2011Date of Patent: October 28, 2014Assignee: National Institute of Information and Communications TechnologyInventors: Chen Sun, Ha Nguyen Tran, Yohannes Alemseged Demessie, Hiroshi Harada
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Patent number: 8849338Abstract: There is disclosed a channel adjusting method capable of suppressing the occurrence of interference between a cognitive pilot channel (CPC) and an auxiliary control channel (ACS) in cognitive wireless communications. According to the channel adjusting method for use in cognitive wireless communications, initially, a connection using a cognitive pilot channel (CPC) is set up. Thereafter, it is determined whether or not a spectrum sensing channel (ACS) is to be utilized. If yes, it is then determined whether or not any interference occurs between the spectrum sensing channel (ACS) and the set-up cognitive pilot channel (CPC). This allows an adjustment to be performed such that no interference occurs between the cognitive pilot channel (CPC) and the spectrum sensing channel (ACS).Type: GrantFiled: July 16, 2010Date of Patent: September 30, 2014Assignee: National Institute of Information and Communications TechnologyInventors: Chen Sun, Yohannes Alemseged Demessie, Ha Nguyen Tran, Hiroshi Harada
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Patent number: 8838162Abstract: Provided is a power control method, etc., in cognitive radio communication, by which power control can be effectively performed without a large indirect cost. In the power control method, a target value of SNR is estimated on the basis of the control information relating to interference. Subsequently, communication power used for the cognitive radio communication is adjusted on the basis of the estimated target value of SNR. Thereby, power control can be effectively performed without a large indirect cost.Type: GrantFiled: July 15, 2010Date of Patent: September 16, 2014Assignee: National Institute of Information and Communications TechnologyInventors: Chen Sun, Yohannes Alemseged Demessie, Ha Nguyen Tran, Hiroshi Harada
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Patent number: 8831520Abstract: In a cognitive radio communication device, before a communication link for the cognitive radio communication is established, a control channel which is a common channel which can be used by a plurality of cognitive radio communication devices is detected. By exchanging sensing information and sensing control information among the plurality of radio communication devices using the detected common channel, the information is shared. The plurality of cognitive radio communication devices share the sensing information and the sensing control information, and use the information for determining a channel used for spectrum monitoring and data communication, and the like.Type: GrantFiled: July 12, 2010Date of Patent: September 9, 2014Assignee: National Institute of Information and Communications TechnologyInventors: Yohannes Alemseged Demessie, Ha Nguyen Tran, Chen Sun, Hiroshi Harada
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Wireless communication system applied to aviation industry and airband interference detection method
Patent number: 8787193Abstract: Provided is a wireless communication system capable of increasing safety in the aviation industry, and applicable to the aviation industry. The wireless communication system comprises a control device and a spectrum sensor. The spectrum sensor performs spectrum sensing using a measurement SAP, receives a signal from a wireless communication device, and transmits information relating to the received signal as sensing information through a communication SAP. On the other hand, the control device receives the sensing information from the spectrum sensor through the communication SAP. Subsequently, the sensing information is analyzed using an application SAP. Thereby, whether or not the signal from the wireless communication device interferes with the radio waves of the airband used in the aviation industry is specified.Type: GrantFiled: January 14, 2011Date of Patent: July 22, 2014Assignee: National Institute Of Information And Communications TechnologyInventors: Chen Sun, Yohannes Alemseged Demessie, Ha Nguyen Tran, Hiroshi Harada -
Spectrum sensor for cognitive wireless communication and method for cognitive wireless communication
Patent number: 8724753Abstract: Provided is a spectrum sensor for cognitive wireless communication whereby it is possible to improve communication efficiency. In a cognitive wireless communication system, a spectrum sensor senses spectra in multiple frequency bands. A spectrum sensor is configured to be able to operate in one operation mode selected from among a spectrum sensing mode for sensing spectra, and a communication mode for communicating with a wireless communication device. Further, the spectrum sensor is provided with a controller for controlling the operation mode. The controller switches between the above-mentioned operation modes during the symbol period of an ultra-wideband physical layer (UWB PHY).Type: GrantFiled: July 21, 2010Date of Patent: May 13, 2014Assignee: National Institute of Information and Communications TechnologyInventors: Yohannes Alemseged Demessie, Chen Sun, Ha Nguyen Tran, Hiroshi Harada -
Patent number: 8675503Abstract: Embodiments of the invention enable a large number of wireless communication networks to be efficiently used while the size of a device operated by a user is reduced and power is saved by providing a communication terminal whose connection with different wireless communication networks can be dynamically reconfigured. A communication terminal whose connection with a plurality of wireless communication networks can be dynamically reconfigured is provided with a data communication aggregation device, a communication application executing device, and a local communication path therebetween. The data communication aggregation device interfaces with the plurality of wireless communication networks and communicates with the communication application executing device through the local communication path. The communication application executing device executes an application for communicating with an outside communication network.Type: GrantFiled: July 28, 2009Date of Patent: March 18, 2014Assignee: National Institute of Information and Communications TechnologyInventors: Kentaro Ishizu, Homare Murakami, Goh Miyamoto, Ha Nguyen Tran, Stanislav Filin, Hiroshi Harada
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Patent number: 8477721Abstract: To reduce power consumption for scanning and maintain communication quality by reducing the time for scanning or connection when a wireless communication terminal switches between networks or base stations. A wireless communication terminal 1 enabling connection with a plurality of base stations disposed in different positions which includes a base station scanning unit 100 detecting and scanning a base station capable of communication at the current position of the wireless communication terminal, a simultaneous detection base station recording unit 101 recording simultaneously detected base stations as simultaneous detection information in a storage unit, a connection candidate extraction unit 102 and a first communication unit 103 performing communication by connection with the extracted connection candidate base station.Type: GrantFiled: September 24, 2009Date of Patent: July 2, 2013Assignee: National Institute of Information and Communications TechnologyInventors: Kentaro Ishizu, Homare Murakami, Goh Miyamoto, Ha Nguyen Tran, Stanislav Filin, Hiroshi Harada
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Patent number: 8406804Abstract: To provide a method of selecting an optimal base station for each application when accumulating communication quality in response to an application type for a base station and a communication terminal switches base stations. A communication quality database 31 is prepared by assigning a current location of a communication terminal device, a currently running application program and a communication quality when executing an application program. When making a new connection with a base station, the current application and location is used to select a base station having an optimal communication quality from the communication quality database 31. This mechanism may be provided in the communication terminal device or may be provided as a communication system including a server device.Type: GrantFiled: November 20, 2009Date of Patent: March 26, 2013Assignee: National Institute of Information and Communications TechnologyInventors: Kentaro Ishizu, Homare Murakami, Goh Miyamoto, Ha Nguyen Tran, Stanislav Filin, Hiroshi Harada
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Publication number: 20130064237Abstract: Disclosed is a wireless communication system and the like that can avoid interference even if a plurality of networks coexist. The wireless communication system includes a primary user, cluster head equipment, and a secondary user. The cluster head equipment is for providing a local area network to a cluster region containing the abovementioned primary user. Also, the cluster head equipment contains: an acquisition means that acquires one or both—of information regarding the primary user and information regarding a primary signal—and the like; and a transmission means that transmits information to the secondary user. Then, using this wireless communication system, the secondary user performs cognitive wireless communication or the like on the basis of the information received from the transmission means of the cluster head equipment.Type: ApplicationFiled: March 15, 2011Publication date: March 14, 2013Applicant: National Institute of Information and CommunicatioInventors: Gabriel Porto Villardi, Chen Sun, Yohannes Alemseged Demessie, Ha Nguyen Tran, Hiroshi Harada
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Publication number: 20120322476Abstract: Disclosed is a wireless communication system capable of avoiding interference even when a network including a secondary user coexists. The wireless communication system includes a primary user belonging to a first network, a first secondary user belonging to a second network, and a coexistence manager (CM). The coexistence manager (CM) acquires information relating to spectrum holes that are, at least temporarily, not in use by the primary user. In addition, the coexistence manager (CM) determines whether or not usage of the spectrum holes by the first secondary user causes interference. If the determination result is that interference is caused, coexistence manager (CM) notifies to this effect a second secondary user belonging to a third network, which differs from the second network.Type: ApplicationFiled: February 22, 2011Publication date: December 20, 2012Applicant: National Institute of Information and Communications TechnologyInventors: Chen Sun, Ha Nguyen Tran, Yohannes Alemseged Demessie, Hiroshi Harada
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Wireless Communication System Applied To Aviation Industry And Airband Interference Detection Method
Publication number: 20120287804Abstract: Provided is a wireless communication system capable of increasing safety in the aviation industry, and applicable to the aviation industry. The wireless communication system comprises a control device and a spectrum sensor. The spectrum sensor performs spectrum sensing using a measurement SAP, receives a signal from a wireless communication device, and transmits information relating to the received signal as sensing information through a communication SAP. On the other hand, the control device receives the sensing information from the spectrum sensor through the communication SAP. Subsequently, the sensing information is analyzed using an application SAP. Thereby, whether or not the signal from the wireless communication device interferes with the radio waves of the airband used in the aviation industry is specified.Type: ApplicationFiled: January 14, 2011Publication date: November 15, 2012Applicant: National Institute of Information and Communicatio TechnologyInventors: Chen Sun, Yohannes Alemseged Demessie, Ha Nguyen Tran, Hiroshi Harada -
SPECTRUM SENSOR FOR COGNITIVE WIRELESS COMMUNICATION AND METHOD FOR COGNITIVE WIRELESS COMMUNICATION
Publication number: 20120140793Abstract: Provided is a spectrum sensor for cognitive wireless communication whereby it is possible to improve communication efficiency. In a cognitive wireless communication system, a spectrum sensor senses spectra in multiple frequency bands. A spectrum sensor is configured to be able to operate in one operation mode selected from among a spectrum sensing mode for sensing spectra, and a communication mode for communicating with a wireless communication device. Further, the spectrum sensor is provided with a controller for controlling the operation mode. The controller switches between the above-mentioned operation modes during the symbol period of an ultra-wideband physical layer (UWB PHY).Type: ApplicationFiled: July 21, 2010Publication date: June 7, 2012Applicant: National Institute of Information and Communication TechnologyInventors: Yohannes Alemseged Demessie, Chen Sun, Ha Nguyen Tran, Hiroshi Harada -
Publication number: 20120135772Abstract: In a cognitive radio communication device, before a communication link for the cognitive radio communication is established, a control channel which is a common channel which can be used by a plurality of cognitive radio communication devices is detected. By exchanging sensing information and sensing control information among the plurality of radio communication devices using the detected common channel, the information is shared. The plurality of cognitive radio communication devices share the sensing information and the sensing control information, and use the information for determining a channel used for spectrum monitoring and data communication, and the like.Type: ApplicationFiled: July 12, 2010Publication date: May 31, 2012Inventors: Yohannes Alemseged Demessie, Ha Nguyen Tran, Chen Sun, Hiroshi Harada
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Publication number: 20120135770Abstract: There is disclosed a channel adjusting method capable of suppressing the occurrence of interference between a cognitive pilot channel (CPC) and an auxiliary control channel (ACS) in cognitive wireless communications. According to the channel adjusting method for use in cognitive wireless communications, initially, a connection using a cognitive pilot channel (CPC) is set up. Thereafter, it is determined whether or not a spectrum sensing channel (ACS) is to be utilized. If yes, it is then determined whether or not any interference occurs between the spectrum sensing channel (ACS) and the set-up cognitive pilot channel (CPC). This allows an adjustment to be performed such that no interference occurs between the cognitive pilot channel (CPC) and the spectrum sensing channel (ACS).Type: ApplicationFiled: July 16, 2010Publication date: May 31, 2012Applicant: National Institute of Information and Communications TechnologyInventors: Chen Sun, Yohannes Alemseged Demessie, Ha Nguyen Tran, Hiroshi Harada
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Publication number: 20120135780Abstract: Provided is a power control method, etc., in cognitive radio communication, by which power control can be effectively performed without a large indirect cost. In the power control method, a target value of SNR is estimated on the basis of the control information relating to interference. Subsequently, communication power used for the cognitive radio communication is adjusted on the basis of the estimated target value of SNR. Thereby, power control can be effectively performed without a large indirect cost.Type: ApplicationFiled: July 15, 2010Publication date: May 31, 2012Applicant: National Institute of Information and Communications TechnologyInventors: Chen Sun, Yohannes Alemseged Demessie, Ha Nguyen Tran, Hiroshi Harada
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Publication number: 20110069638Abstract: Object: To provide a mechanism and a function of a system that can determine a communication method and the like effectively utilizing frequency resources, considering priority of each communication, in a cognitive communication network system of a frequency shared type or the like assuming that a given frequency band is shared by a plurality of systems in use.Type: ApplicationFiled: September 24, 2010Publication date: March 24, 2011Inventors: Kentaro ISHIZU, Homare MURAKAMI, Goh MIYAMOTO, Ha Nguyen TRAN, Stanislav FILIN, Chen SUN, Yohannes Alemseged DEMESSIE, Hiroshi HARADA