Patents Assigned to Chongqing University of Posts and Telecommunications
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Patent number: 11663707Abstract: A method for image processing, which comprises the following steps: Generating a first histogram from a first image; Calculating a first parameter profile from the first image indicative of the quality of the first image; Adjusting the first parameter profile to generate a second parameter profile; Using the second parameter profile to generate a statistical distribution via a statistical distribution generator, wherein the statistical distribution is characterized by at least three parameters; Using the statistical distribution to perform a histogram specification to the first histogram of the first image to generate a second histogram; Generating a second image based on the first image and the second histogram.Type: GrantFiled: March 28, 2022Date of Patent: May 30, 2023Assignee: CHONGQING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Guoyin Wang, Tong Zhao, Bin Xiao
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Patent number: 11640158Abstract: Provided is a data security sharing method for multiple edge nodes to operate in a collaboration mode under an industrial cloud environment. The method includes: firstly, edge nodes that need collaborative computing separately applying for a shared key to an authority center; secondly, the authority center generating a shared key and issuing the key to each of the edge nodes applying for participation in the collaborative computing; again, the edge nodes combining industrial characteristics to generate an interference factor set, and adding different interference factors for different types of data; then, the data of the edge nodes is implemented with improved homomorphic encryption and is uploaded to an industrial cloud platform; and finally, the industrial cloud platform performing homomorphic analysis and computing on the data uploaded by each of the edge nodes, and issuing the data back to each of the edge nodes.Type: GrantFiled: April 27, 2018Date of Patent: May 2, 2023Assignee: CHONGQING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Min Wei, Jiuchao Mao, Ping Wang
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Patent number: 11624731Abstract: A method for predicting a remaining life of a tool of a computer numerical control machine is provided. In the method, indirect measurement indicators of the tool are selected based on monitoring and analyzing a current state of the tool, a prediction model for the remaining life of the tool is established based on data de-noising, feature extraction and a multi-kernel W-LSSVM algorithm. Thereby, a method for predicting a remaining life of a tool of a computer numerical control machine is provided.Type: GrantFiled: May 15, 2020Date of Patent: April 11, 2023Assignee: CHONGQING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Qingqing Huang, Zhen Kang, Yan Zhang, Shuaiyong Li, Jiajun Zhou
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MULTI-CARRIER RESOURCE ALLOCATION METHOD BASED ON WIRELESS-POWERED BACKSCATTER COMMUNICATION NETWORK
Publication number: 20220407592Abstract: The present invention relates to a multi-carrier resource allocation method based on a wireless-powered backscatter communication network. The method comprises following steps: S1.Type: ApplicationFiled: December 26, 2020Publication date: December 22, 2022Applicant: CHONGQING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Yongjun Xu, Qianbin Chen, Guoquan Li, Qilie Liu -
Patent number: 11516702Abstract: The present disclosure disclosed a method of determining a buffer status report (BSR). The method comprises obtaining, by a user equipment (UE) from a buffer, data item to be sent; determining, by the UE, a size of the data item to be sent; determining, by the UE, a minimum number of required logical channel groups (LCGs) based on the data item to be sent; and determining, by the UE, at least one BSR with flexible length based on the size of the data item to be sent and the minimum number of the required LCGs. Information of the at least one BSR with flexible length includes the minimum number of the required LCGs, LCG identifiers (LCG IDs) respectively associated with the minimum number of the required LCGs, and at least one buffer area corresponding to the LCG IDs.Type: GrantFiled: August 31, 2020Date of Patent: November 29, 2022Assignee: CHONGQING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Ruyan Wang, Yaping Cui, Dapeng Wu, Puning Zhang, Shushan Si
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Publication number: 20220369258Abstract: The present invention relates to a frequency offset estimation method for average consensus-based clock synchronization, and belongs to the technical field of wireless sensor networks. According to the method, in combination with distributed one-way broadcast characteristics, solving of maximum likelihood estimation is converted into a linear optimization problem, and a relative frequency offset estimation value is obtained by adopting an iterative method. By applying the estimation value to the compensation of logic clock parameter between nodes, an effect of keeping logic clocks of network nodes consistent can be achieved.Type: ApplicationFiled: November 15, 2019Publication date: November 17, 2022Applicant: Chongqing University Of Posts And TelecommunicationsInventors: Heng Wang, Liuqing Chen, Pengfei Gong
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Patent number: 11502956Abstract: A method for content caching in information centric network virtualization includes receiving, by a first node, a first data packet; in response to a cache distance identifier hop of the first data packet being less than a preset maximum cache distance, setting hop=hop+1 and sending the first data packet to a next node by the first node; in response to the hop being not less than the preset maximum cache distance and there being available cache space in the first node, setting hop=0, storing the first data packet, and sending the first data packet to the next node by the first node. The node determines whether to cache a data packet based on the cache distance identifier of the data packet, which comprehensively considers the cache energy consumption caused by caching the data packet in the node and the transmission energy consumption caused by transmission of the data packet in the link, thereby effectively reducing the total energy consumption of the network.Type: GrantFiled: March 22, 2019Date of Patent: November 15, 2022Assignee: Chongqing University of Posts and TelecommunicationsInventors: Qilie Liu, Xiaoxiao Wang, Liqiang Zhuge, Yanyu Wang, Zheng Li, Bin Cao, Jingcheng Liu, Fengfan Yang
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Publication number: 20220353195Abstract: A scheduling method applied in an industrial heterogeneous network in which a TSN and a non-TSN are interconnected is provided. The TSSDN controller classifies data flows according to the delay requirements, and calculates the scheduling priorities of the data flows in the industrial heterogeneous network. The TSSDN controller adopts an improved CSPF algorithm to determine a shortest path in the heterogeneous network, and marks the scheduling priorities of the data flows which are transmitted from the subnet of the heterogeneous network and arrive at the switch for the first time. Flow table matching is performed at the SDN switch. In a case of performing flow table matching successfully, the counter is updated and the instruction included in the flow table is executed. In a case of performing flow table matching unsuccessfully, a PacketIn message is transmitted to the TSSDN controller, and the TSSDN controller performs analysis and makes a decision.Type: ApplicationFiled: July 15, 2020Publication date: November 3, 2022Applicant: CHONGQING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Min WEI, XueQin XIANG, Ping WANG, XianChun YAN
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Patent number: 11483341Abstract: The present invention relates to a DDoS attack detection and mitigation method for an industrial SDN network, and belongs to the field of network security. According to the method, by means of the cooperation between an east-west interface of an SDN controller in an industrial backhaul network and a system manager of an industrial access network, in conjunction with the features of the industrial backhaul network and an industrial access network data packet, a flow entry matching field of an OpenFlow switch is extended, and a flow table 0 is set to be a “flow table dedicated to DDoS attack mitigation” for defending against an attacking data flow in a timely manner. By using the SDN controller of an industrial backhaul network and a DDoS attack detection and mitigation system, an attacking data flow is identified and a DDoS attack source is found, and the policy of mitigating a DDoS attack is implemented by means of scheduling a system manager of the industrial access network.Type: GrantFiled: March 6, 2018Date of Patent: October 25, 2022Assignee: CHONGQING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Min Wei, Tao Yang, Jiuchao Mao, Qiaoyue Pang, Ping Wang
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Publication number: 20220321355Abstract: The present invention relates to a judgment method for edge node computing result trustworthiness based on trust evaluation, and belongs to the technical field of data processing. By means of the present invention, a security mechanism for trustworthiness of a computing result output by an industrial edge node is guaranteed, the industrial edge node is prevented from outputting error data, and attacks of false data of malicious edge nodes are resisted, it is guaranteed that trustworthy computing results not be tampered are input in the industrial cloud, and a site device is made to receive correct computing results rather than malicious or meaningless messages, thereby improving efficiency and security of industrial production.Type: ApplicationFiled: July 15, 2020Publication date: October 6, 2022Applicant: CHONGQING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Min Wei, Er Xiong Liang, Ping Wang
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Publication number: 20220303839Abstract: The present disclosure relates to systems and methods for a handover. The methods may include establishing a connection between a vehicle terminal and a first macro evolved Node B (MeNB) and a connection between the vehicle terminal and a secondary evolved Node B (SeNB), the vehicle terminal in a dual connectivity mode with the first MeNB and the SeNB; receiving, by the vehicle terminal, a handover command from the first MeNB; and disconnecting, based on the handover command, the vehicle terminal from the first MeNB and establishing synchronization between the vehicle terminal and a second MeNB, wherein the connection between the vehicle terminal and the SeNB is maintained. The SeNB is a secondary vehicle terminal meeting a preset condition or an SeNB installed at a fixed location.Type: ApplicationFiled: June 6, 2022Publication date: September 22, 2022Applicant: CHONGQING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Dapeng WU, Yaping CUI, Ruyan WANG, Feng ZHANG
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Patent number: 11424974Abstract: The present disclosure provides a multi-carrier time-division multiplexing (MC-TDMA) modulation and demodulation method and system. Before multi-carrier modulation is performed on an input symbol, an interleaving allocation and an FFT may be performed, a time domain symbol may be transformed into a frequency domain symbol signal to perform a MDFT treatment. A sending end may adopt an analyzing filter bank structure, and pre-filtering and an IFFT may be performed on a signal successively. A pre-filter may be positioned between an NM point FFT and an M point IFFT, a PAPR value of the system may be reduced using the symmetry of a coefficient of a filter, and a frequency domain symbol signal may be allocated to different sub-bands for multi-carrier modulation.Type: GrantFiled: November 2, 2020Date of Patent: August 23, 2022Assignee: CHONGQING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Guangyu Wang, Qianbin Chen, Kai Shao, Ling Zhuang
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Patent number: 11415417Abstract: A cavity optomechanical vibratory gyroscope pertains to technical fields of resonant optical gyroscopes and micro-optical-electro-mechanical systems. A novel cavity optomechnical Coriolis vibratory micro gyroscope is realized based on ring micro rings and the Coriolis vibration principle, and driving and detection thereof is completely different from conventional electric or magnetic means. Based on the principle of angular velocity sensitive structures in the conventional Coriolis vibratory gyroscopes, full-optical driving, detecting and sensing of a vibratory gyroscope are achieved using cavity optomechnical technologies, which fundamentally suppresses various noises (including thermal noise, cross interference, connection point noise and quadrature error) introduced by electric or magnetic driving. Besides, displacement (vibration) sensing information is obtained according to a linear relationship between frequency shift and light amplitude in the micro cavity optomechnical effect.Type: GrantFiled: September 25, 2020Date of Patent: August 16, 2022Assignee: CHONGQING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Yu Liu, Yongle Lu, Huihui Yang, Ke Di, Xinhai Zou, Zhen Fang, Jijun Bu, Yong Yang, Lele Fu
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Publication number: 20220222792Abstract: A method for image processing, which comprises the following steps: Generating a first histogram from a first image; Calculating a first parameter profile from the first image indicative of the quality of the first image; Adjusting the first parameter profile to generate a second parameter profile; Using the second parameter profile to generate a statistical distribution via a statistical distribution generator, wherein the statistical distribution is characterized by at least three parameters; Using the statistical distribution to perform a histogram specification to the first histogram of the first image to generate a second histogram; Generating a second image based on the first image and the second histogram.Type: ApplicationFiled: March 28, 2022Publication date: July 14, 2022Applicant: CHONGQING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Guoyin WANG, Tong ZHAO, Bin XIAO
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Publication number: 20220187894Abstract: The present invention provides a factory power management and control method based on edge-cloud coordination, including: 1) forming an industrial field network by a field node, a routing node and a device executing production tasks; 2) parsing production task information data and sending; 3) issuing an STN model in production field to an edge node; 4) sending to the edge node; 5) computing, required to complete the production tasks; 6) computing values of comprehensive ranks; 7) executing, by the edge node, the higher rank, and executing, by the cloud power management center, the lower rank; 8) executing, by the edge node, a demand response algorithm; 9) executing, by the production device, the production tasks based on computing results; and executing, by a power generation station in factory, a power storage station in factory and a power supply station outside factory, corresponding schemes based on the results.Type: ApplicationFiled: July 15, 2020Publication date: June 16, 2022Applicant: CHONGQING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Ping Wang, Xu Yang, Min Wei, Caiqin LI
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Patent number: 11356908Abstract: The present disclosure relates to systems and methods for a handover. The methods may include establishing a connection between a vehicle terminal and a first macro evolved Node B (MeNB) and a connection between the vehicle terminal and a secondary evolved Node B (SeNB), the vehicle terminal in a dual connectivity mode with the first MeNB and the SeNB; receiving, by the vehicle terminal, a handover command from the first MeNB; and disconnecting, based on the handover command, the vehicle terminal from the first MeNB and establishing synchronization between the vehicle terminal and a second MeNB, wherein the connection between the vehicle terminal and the SeNB is maintained. The SeNB is a secondary vehicle terminal meeting a preset condition or an SeNB installed at a fixed location.Type: GrantFiled: August 31, 2020Date of Patent: June 7, 2022Assignee: CHONGQING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Dapeng Wu, Yaping Cui, Ruyan Wang, Feng Zhang
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Publication number: 20220146462Abstract: A method for predicting a remaining life of a tool of a computer numerical control machine is provided. In the method, indirect measurement indicators of the tool are selected based on monitoring and analyzing a current state of the tool, a prediction model for the remaining life of the tool is established based on data de-noising, feature extraction and a multi-kernel W-LSSVM algorithm. Thereby, a method for predicting a remaining life of a tool of a computer numerical control machine is provided.Type: ApplicationFiled: May 15, 2020Publication date: May 12, 2022Applicant: CHONGQING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Qingqing HUANG, Zhen KANG, Yan ZHANG, Shuaiyong LI, Jiajun ZHOU
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Publication number: 20220113135Abstract: A cavity optomechanical vibratory gyroscope pertains to technical fields of resonant optical gyroscopes and micro-optical-electro-mechanical systems. A novel cavity optomechnical Coriolis vibratory micro gyroscope is realized based on ring micro rings and the Coriolis vibration principle, and driving and detection thereof is completely different from conventional electric or magnetic means. Based on the principle of angular velocity sensitive structures in the conventional Coriolis vibratory gyroscopes, full-optical driving, detecting and sensing of a vibratory gyroscope are achieved using cavity optomechnical technologies, which fundamentally suppresses various noises (including thermal noise, cross interference, connection point noise and quadrature error) introduced by electric or magnetic driving. Besides, displacement (vibration) sensing information is obtained according to a linear relationship between frequency shift and light amplitude in the micro cavity optomechnical effect.Type: ApplicationFiled: September 25, 2020Publication date: April 14, 2022Applicant: CHONGQING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Yu LIU, Yongle LU, Huihui YANG, Ke DI, Xinhai ZOU, Zhen FANG, Jijun BU, Yong YANG, Lele FU
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Patent number: 11288783Abstract: A method for image processing, which comprises the following steps: Generating a first histogram from a first image; Calculating a first parameter profile from the first image indicative of the quality of the first image; Adjusting the first parameter profile to generate a second parameter profile; Using the second parameter profile to generate a statistical distribution via a statistical distribution generator, wherein the statistical distribution is characterized by at least three parameters; Using the statistical distribution to perform a histogram specification to the first histogram of the first image to generate a second histogram; Generating a second image based on the first image and the second histogram.Type: GrantFiled: February 21, 2020Date of Patent: March 29, 2022Assignee: CHONGQING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Guoyin Wang, Tong Zhao, Bin Xiao
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Publication number: 20220085954Abstract: The present invention relates to a method for estimating clock frequency offsets of industrial wireless sensor networks based on timing response. In the method, a data packet is sent from a node to be synchronized to a reference node. After the reference node receives the data packet, it replies an acknowledgement after a timing response interval, which is mapped according to a sequence number of the data packet. After communication and interaction for multiple times, a relative frequency offset and a fixed delay between node clocks can be estimated by the node to be synchronized without exchanging timestamp information. The present invention does not need to receive or send messages specially used for time synchronization parameter estimation, which realizes a long-term tracking of clock frequency offset with a low computation cost and reduces communication overhead and energy consumption.Type: ApplicationFiled: January 14, 2020Publication date: March 17, 2022Applicant: CHONGQING UNIVERSITY OF POSTS AND TELECOMMUNICATIONSInventors: Heng Wang, Yang Zhong, Fei Yu