Patents by Inventor Yuanyuan Li
Yuanyuan Li 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: 9380522Abstract: Embodiments of the present application relate to the field of wireless communications, and in particular, to a method and an apparatus for cell search in a sensor system, used for solving the problem in the prior art that an operation time delay is long in cell selection and cell residence. The method of the embodiments of the present application comprises: a terminal determining different types of frequency points in frequency points supported by the sensor system, the frequency points of the sensor system being divided, in a diminishing sequence of priorities, into a first type of authorization frequency point, a first type of non-authorization frequency point, a second type of authorization frequency point and a second type of non-authorization frequency point; and performing, in a diminishing sequence of priorities, cell search and cell residence on the frequency points supported by the sensor system.Type: GrantFiled: July 11, 2013Date of Patent: June 28, 2016Assignee: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGYInventors: Yuanyuan Li, Wenling Bai, Chenggang Jiang, Yu Yang
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Patent number: 9380464Abstract: Disclosed are a method and device for determining and assisting in determining a back-up frequency in a cognitive radio system. A first cognitive system shares the wireless communication spectrum resources of an incumbent system, and the method thereof for determining a back-up frequency comprises: through a terminal, a first cognitive system obtaining a back-up frequency of a second cognitive system which has overlapping coverage in a target area in an overlapping coverage area; and according to the back-up frequency of the second cognitive system in the overlapping coverage area, selecting from the wireless communication spectrum resources at least one frequency as a back-up frequency in the target area. When determining the back-up frequency, the first cognitive system can refer to the back-up frequency of the second cognitive system to conduct determination, thereby optimizing the system performance.Type: GrantFiled: June 9, 2013Date of Patent: June 28, 2016Assignee: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGYInventors: Yuanyuan Li, Chenggang Jiang, Wenling Bai, Yu Yang
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Patent number: 9282478Abstract: The embodiments of the present application relate to the technical field of wireless communications, and in particular to a method, system and device for triggering and performing spectrum sensing, used for solving the problem in the prior art that if the sensing period is set too long, a decline of service quality between an authorization system and a cognitive system or even a network paralysis will be caused due to interference; and if the sensing period is set too short, an increase in power consumption of devices and a waste of spectrum resources will be caused. The method for performing spectrum sensing in the embodiments of the present application includes: a sensing node judging whether or not the channel quality has declined to the requirement for performing in-band spectrum sensing; and after determining that the channel quality has declined to the requirement for performing in-band spectrum sensing, the sensing node performing in-band spectrum sensing.Type: GrantFiled: March 27, 2012Date of Patent: March 8, 2016Assignee: China Academy of Telecommunications TechnologyInventors: Chenggang Jiang, Yuanyuan Li, Wenling Bai, Yu Yang
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Publication number: 20160057765Abstract: The present disclosure provides a dynamic spectrum allocation method and a dynamic spectrum allocation device. In the method, a centralized node performs spectrum allocation and transmits a spectrum allocation result to each communication node, so that the communication node operates at a corresponding spectrum resource in accordance with the spectrum allocation result and performs statistics of communication quality measurement information. The centralized node receives the communication quality measurement information reported by the communication node, and determines whether or not it is required to trigger the spectrum re-allocation for the communication node in accordance with the communication quality measurement information about the communication node. When it is required to trigger the spectrum re-allocation, the centralized node re-allocates the spectrum for the communication node.Type: ApplicationFiled: March 26, 2014Publication date: February 25, 2016Inventors: Chenggang JIANG, Wenling BAI, Yuanyuan LI, Yu YANG, Jinling HU
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Patent number: 9210726Abstract: Various examples of the present disclosure describe a random access method and device in a CR system. The method includes: generating, by a base station device, a spectrum handover command, wherein the spectrum handover command comprises random access backoff time parameter information; and sending, by the base station device, the spectrum handover command to a user equipment in a cell to instruct the UE to initiate, during a spectrum handover procedure, a random access procedure using the random access backoff time parameter information. According to the various examples of the present disclosure, the random access backoff time parameter information is carried in the spectrum handover command, so that a random access conflict is suppressed during the spectrum handover procedure of the CR system. A large number of UEs that intensively perform random access on a target working frequency are pre-dispersed in time.Type: GrantFiled: September 11, 2012Date of Patent: December 8, 2015Assignee: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGYInventors: Wenling Bai, Zhuo Gao, Chenggang Jiang, Yuanyuan Li, Yu Yang
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Patent number: 9071345Abstract: The present disclosure provides a method and an apparatus for obtaining an idle spectrum. The method includes: obtaining, by a central management unit, configuration information of a transmitter of an authorized system, and obtaining geographic location information of candidate sense nodes; selecting, by the central management unit, sense nodes from the candidate sense nodes according to the configuration information and the geographic location information, and informing the selected sense nodes to perform spectrum sensing; and receiving, by the central management unit, sensing results of the selected sense nodes, and obtaining information of an idle spectrum according to the sensing results.Type: GrantFiled: March 27, 2012Date of Patent: June 30, 2015Assignee: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGYInventors: Wenling Bai, Chenggang Jiang, Yuanyuan Li, Yu Yang
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Publication number: 20150181438Abstract: Disclosed are a method and device for determining and assisting in determining a back-up frequency in a cognitive radio system. A first cognitive system shares the wireless communication spectrum resources of an incumbent system, and the method thereof for determining a back-up frequency comprises: through a terminal, a first cognitive system obtaining a back-up frequency of a second cognitive system which has overlapping coverage in a target area in an overlapping coverage area; and according to the back-up frequency of the second cognitive system in the overlapping coverage area, selecting from the wireless communication spectrum resources at least one frequency as a back-up frequency in the target area. When determining the back-up frequency, the first cognitive system can refer to the back-up frequency of the second cognitive system to conduct determination, thereby optimizing the system performance.Type: ApplicationFiled: June 9, 2013Publication date: June 25, 2015Inventors: Yuanyuan Li, Chenggang Jiang, Wenling Bai, Yu Yang
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Publication number: 20150173003Abstract: Embodiments of the present application relate to the field of wireless communications, and in particular, to a method and an apparatus for cell search in a sensor system, used for solving the problem in the prior art that an operation time delay is long in cell selection and cell residence. The method of the embodiments of the present application comprises: a terminal determining different types of frequency points in frequency points supported by the sensor system, the frequency points of the sensor system being divided, in a diminishing sequence of priorities, into a first type of authorization frequency point, a first type of non-authorization frequency point, a second type of authorization frequency point and a second type of non-authorization frequency point; and performing, in a diminishing sequence of priorities, cell search and cell residence on the frequency points supported by the sensor system.Type: ApplicationFiled: July 11, 2013Publication date: June 18, 2015Applicant: China academy of Telecommunications TechnologyInventors: Yuanyuan Li, Wenling Bai, Chenggang Jiang, Yu Yang
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Publication number: 20150163080Abstract: A method and device for determining available spectrums is disclosed in embodiments of the present invention. By applying the technical solution of the embodiments of the present invention, with consideration on the bi-directionality of the interference between wireless communication systems, when introduction of the cognitive system is required, the corresponding frequency will be determined as an available frequency only in the case the incumbent system and the cognitive system can be simultaneously guaranteed to meet the corresponding coexistence criterion among the corresponding frequency and adjacent frequencies thereof, thus ensuring that the determined available frequency band guarantees that the normal operation of the incumbent system is not interfered by the cognitive system while ensuring that the newly-introduced cognitive system can also operate normally without interference of the incumbent system, thereby improving the communication quality of the wireless communication systems.Type: ApplicationFiled: August 10, 2012Publication date: June 11, 2015Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGYInventors: Yuanyuan Li, Yeming Tang, Wenling Bai, Chenggang Jiang, Yu Yang, Xiaolu Wang, Xin Tong
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Publication number: 20150139049Abstract: The cognitive radio cell acquires a scheme dividing frequency band resources into a number of sub-bands and corresponding silent period time frequency pattern, when performing silence on the sub-band which the cognitive radio cell works on according to the silence period time position of each sub-band defined in the silent period time frequency pattern, spectrum sensing on corresponding sub-band is implemented by radio spectrum sensing system or cognitive radio cell.Type: ApplicationFiled: June 7, 2013Publication date: May 21, 2015Inventors: Chenggang Jiang, Yuanyuan Li, Wenling Bai, Yu Yang
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Publication number: 20150003273Abstract: Various examples of the present disclosure describe a method for configuring a quiet period in a CR system and a device thereof. The method includes: determining, by a base station, a maximum value of a quiet period parameter of a CR system based on maximum duration of interference which a radio authorization system tolerates and maximum loss of capacity which the CR system tolerates; determining a sensing algorithm based on a detecting performance requirement and the maximum value of the quiet period parameter; determining a value of the quiet period parameter based on the sensing algorithm; and sending the quiet period parameter to a terminal of the CR system. When the examples of the present disclosure are employed, the rationality of the configuration of the quiet period parameter of the CR system is improved and the capacity loss of the CR system is reduced when the interference to the authorization system is reduced.Type: ApplicationFiled: February 4, 2013Publication date: January 1, 2015Inventors: Yuanyuan Li, Wenling Bai, Chenggang Jiang, Yu Yang
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Patent number: 8894966Abstract: A micro-mixer and use thereof for synthesis of barium sulfate particles is disclosed. The micro-mixer includes feeding tubes, reservoirs, a mixing channel, a buffer reservoir and a sampling tube. The mixing channel is made of hydrophobic materials and processed into a spiral structure, in which baffles are set in interval arrangement at both sides of the channel wall. The types of the baffles include leaning-forward baffles, vertical baffles and leaning-backward baffles. Setting the baffles helps produce local secondary flow in the mixer, which enhances fluids mixing process. The micro-mixer is suitable to rapid reactions or precipitation processes, whose reaction time is much less than mixing time, and has broad application prospects in many fields involving mixing reaction such as pharmaceutical and chemistry industry.Type: GrantFiled: October 31, 2013Date of Patent: November 25, 2014Assignees: Institute of Process Engineering, Chinese Academy of Sciences, Nanjing Ziuzhang Chemical Technology Co., LtdInventors: Chao Yang, Xi Wang, Yumei Yong, Guangji Zhang, Jingcai Cheng, Xin Feng, Xiangyang Li, Weipeng Zhang, Yuanyuan Li, Zaisha Mao
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Publication number: 20140328325Abstract: Various examples of the present disclosure describe a random access method and device in a CR system. The method includes: generating, by a base station device, a spectrum handover command, wherein the spectrum handover command comprises random access backoff time parameter information; and sending, by the base station device, the spectrum handover command to a user equipment in a cell to instruct the UE to initiate, during a spectrum handover procedure, a random access procedure using the random access backoff time parameter information. According to the various examples of the present disclosure, the random access backoff time parameter information is carried in the spectrum handover command, so that a random access conflict is suppressed during the spectrum handover procedure of the CR system. A large number of UEs that intensively perform random access on a target working frequency are pre-dispersed in time.Type: ApplicationFiled: September 11, 2012Publication date: November 6, 2014Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGYInventors: Wenling BAI, Zhuo GAO, Chenggang JIANG, Yuanyuan LI, Yu YANG
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Publication number: 20140323096Abstract: Various examples provide a method and a system for spectrum handover in cognitive radio (CR) systems. According to the method, after detecting a user of an authorized system appears at a current working frequency, the base station generates a spectrum handover command and sends the spectrum handover command via a channel identified by the CR DWNDI to instruct the UEs in the cell to perform spectrum handover according to the spectrum handover command.Type: ApplicationFiled: September 28, 2012Publication date: October 30, 2014Inventors: Wenling Bai, Zhuo Gao, Chenggang Jiang, Yuanyuan Li, Yu Yang
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Patent number: 8859437Abstract: Disclosed herein is an aqueous alkaline etching solution comprising water and an alkaline material being selected from the group consisting of ammonium hydroxide, ammonium phosphate, ammonium carbonate, quaternary ammonium hydroxide, quaternary ammonium phosphate, quaternary ammonium carbonate, an alkali metal hydroxide, an alkaline earth metal hydroxide, or a combination comprising at least one of the foregoing alkaline materials; the aqueous alkaline solution being operative to etch aluminum oxide at a rate greater than or equal to about 2:1 over a rate at which it etches a metal oxide semiconductor to be protected; wherein the aqueous etching solution has a pH of 8 to 13.Type: GrantFiled: December 31, 2012Date of Patent: October 14, 2014Assignee: The Penn State Research FoundationInventors: Yuanyuan Li, Kaige Sun, Thomas N. Jackson
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Publication number: 20140193945Abstract: Disclosed herein is an aqueous alkaline etching solution comprising water and an alkaline material being selected from the group consisting of ammonium hydroxide, ammonium phosphate, ammonium carbonate, quaternary ammonium hydroxide, quaternary ammonium phosphate, quaternary ammonium carbonate, an alkali metal hydroxide, an alkaline earth metal hydroxide, or a combination comprising at least one of the foregoing alkaline materials; the aqueous alkaline solution being operative to etch aluminum oxide at a rate greater than or equal to about 2:1 over a rate at which it etches a metal oxide semiconductor to be protected; wherein the aqueous etching solution has a pH of 8 to 13.Type: ApplicationFiled: December 31, 2012Publication date: July 10, 2014Inventors: Yuanyuan Li, Kaige Sun, Thomas N. Jackson
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Patent number: 8773380Abstract: An interface updating method for touch screen and a multimedia electronic device are provided, which are used for solving the problem of how to update a display interface of a touch screen according to the slide operating characteristics of a controller. When the controller slides on the touch screen, the operating characteristics of the controller are determined based on the predetermined number of pixel point samples that the slide trail of the controller goes through at last. The interface is updated according to the operating characteristics of the controller. The interface adjustment visually obtains an effect corresponding to the movement of the controller.Type: GrantFiled: April 3, 2010Date of Patent: July 8, 2014Assignee: HiSense Mobile Communications Technology Co., Ltd.Inventor: Yuanyuan Li
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Publication number: 20140185653Abstract: The present disclosure provides a method and an apparatus for obtaining an idle spectrum. The method includes: obtaining, by a central management unit, configuration information of a transmitter of an authorized system, and obtaining geographic location information of candidate sense nodes; selecting, by the central management unit, sense nodes from the candidate sense nodes according to the configuration information and the geographic location information, and informing the selected sense nodes to perform spectrum sensing; and receiving, by the central management unit, sensing results of the selected sense nodes, and obtaining information of an idle spectrum according to the sensing results.Type: ApplicationFiled: March 27, 2012Publication date: July 3, 2014Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGYInventors: Wenling Bai, Chenggang Jiang, Yuanyuan Li, Yu Yang
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Publication number: 20140120031Abstract: A micro-mixer and use thereof for synthesis of barium sulfate particles is disclosed. The micro-mixer includes feeding tubes, reservoirs, a mixing channel, a buffer reservoir and a sampling tube. The mixing channel is made of hydrophobic materials and processed into a spiral structure, in which baffles are set in interval arrangement at both sides of the channel wall. The types of the baffles include leaning-forward baffles, vertical baffles and leaning-backward baffles. Setting the baffles helps produce local secondary flow in the mixer, which enhances fluids mixing process. The micro-mixer is suitable to rapid reactions or precipitation processes, whose reaction time is much less than mixing time, and has broad application prospects in many fields involving mixing reaction such as pharmaceutical and chemistry industry.Type: ApplicationFiled: October 31, 2013Publication date: May 1, 2014Applicants: Nanjing Jiuzhang Chemical Technology Co., Ltd, Institute of Process Engineering, Chinese Academy of SciencesInventors: Chao YANG, Xi WANG, Yumei YONG, Guangji ZHANG, Jingcai CHENG, Xin FENG, Xiangyang LI, Weipeng ZHANG, Yuanyuan LI, Zaisha MAO
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Publication number: 20140120970Abstract: The embodiments of the present application relate to the technical field of wireless communications, and in particular to a method, system and device for triggering and performing spectrum sensing, used for solving the problem in the prior art that if the sensing period is set too long, a decline of service quality between an authorization system and a cognitive system or even a network paralysis will be caused due to interference; and if the sensing period is set too short, an increase in power consumption of devices and a waste of spectrum resources will be caused. The method for performing spectrum sensing in the embodiments of the present application includes: a sensing node judging whether or not the channel quality has declined to the requirement for performing in-band spectrum sensing; and after determining that the channel quality has declined to the requirement for performing in-band spectrum sensing, the sensing node performing in-band spectrum sensing.Type: ApplicationFiled: March 27, 2012Publication date: May 1, 2014Inventors: Chenggang Jiang, Yuanyuan Li, Wenling Bai, Yu Yang