Patents Assigned to VIETTEL GROUP
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Patent number: 11351701Abstract: The present invention proposes a method of industrial composite manufacturing. The method combines the resin transferring molding method with vacuum process and compression process in appropriate orders for achieving high quality products. In the curing process, microwaves are used to harden the plastic resin in the mold. Specifically, the main steps of the method are following: step 1: preparation of materials and equipment; Step 2: Disposition of the reinforced fibers/fabrics and mold closing at the extend position; Step 3: Vacuum and transfer plastic resin into the mold; Step 4: Mold closing by compression pressure; Step 5: Plastic resin curing by using a microwave system; Step 6: Open the mold and take the composite product.Type: GrantFiled: August 28, 2019Date of Patent: June 7, 2022Assignee: VIETTEL GROUPInventors: Anh Vu Nguyen, Trong Dai Vu, Ky Nam Pham
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Publication number: 20220174629Abstract: The method of synchronizing data frames between 5G baseband processing stations by GPS-integrated local oscillator block control, including the following steps: step 1: synchronize the baseband processor's local oscillator block with the GPS's 1 pps pulse and generate a 10 ms pulse from the local oscillator; step 2: use the 10 ms synchronous pulse sync monitor block to get the sync offset between this pulse and the GPS 1 pps pulse; step 3: use the control algorithm to reconfigure the local oscillator so that the 10 ms synchronous pulse can follow the 1 pps GPS pulse.Type: ApplicationFiled: November 30, 2021Publication date: June 2, 2022Applicant: VIETTEL GROUPInventors: Hong Quan Dau, Quoc Thanh Phan, Thien Vu Tang, Quoc Viet Ta, Chi Linh Nguyen
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Patent number: 11345787Abstract: Methods of manufacturing high-temperature composite materials using carbon nanotube to improve the efficiency of insulation applied to propulsion systems for aerospace equipment including 5 steps: step 1: select necessary materials and equipment, step 2: disperse MW-CNTs in the polar solution, step 3: distribute MW-CNTs evenly in the resin, step 4: eliminate residual solvents, step 5: curing phenolic resin composites.Type: GrantFiled: October 28, 2019Date of Patent: May 31, 2022Assignee: VIETTEL GROUPInventors: Dinh Nguyen Nguyen, Ky Nam Pham, Trong Dai Vu
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Patent number: 11320638Abstract: The invention proposed the catadioptric system, which consists of two main components: the first component comprising the two reflective mirrors, in which surface distortion of mirror 1 is parabolic, surface distortion of mirror 2 is aspheric; the second component is a relay consisting of three lenses: lens 1, lens 2, and lens 3 arranged after the medial image plane correspondingly; the second component helps reduce aberration to ensure receiving good quality image at a plane of the sensor.Type: GrantFiled: August 28, 2019Date of Patent: May 3, 2022Assignee: VIETTEL GROUPInventors: Tien Hai Tran, Quang Trung Trinh, Duy Nhat Tran
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Publication number: 20220132429Abstract: A method for uplink closed loop power control in advanced wireless systems which adaptively adjusts target signal-to-interference noise ratio (SINRtarget) in order to achieve the best uplink throughput of data services is disclosed. To derive the desired target SINR, the system collects and evaluates various uplink parameters as inputs: real-time signal-to-interference noise ratio of data physical channel, terminal power headroom, and terminal buffer data status and data service requirements.Type: ApplicationFiled: October 26, 2021Publication date: April 28, 2022Applicant: VIETTEL GROUPInventors: Thi Huong Giang Vu, Anh Tu Nguyen, Van Tung Tran
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Publication number: 20220132465Abstract: Method for scheduling paging in telecommunication network making the list candidate base station to send paging message. This method based on the Haversine formula to calculate distance between pair of base station from position information (latitude, longitude) and filter by situation: Distance=<?*Min (which ? is 3) to make the list candidate base station for each of base station in list input. This method is useable for the telecommunication system which need to page UE for mobile terminated (MT) service.Type: ApplicationFiled: October 26, 2021Publication date: April 28, 2022Applicant: VIETTEL GROUPInventors: Quang Diep Pham, Minh Duc Do, Minh Tu Le
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Publication number: 20220129203Abstract: A method of queue design for data storage and management applies RAM data synchronization technology on many distributed nodes, both ensures storage performance and solves the problem of data loss in the system operation process; performs business separation and parallelize actions to optimize processing performance; uses simply extracted information instead of accessing the original information helps to speed up the processing ability and promptly detect events that exceed the threshold; allocates a fixed memory for the queue to ensure the safety of the whole system; in addition, provides monitoring and early warning of possible incidents. The method includes: step 1: build a deployment model; step 2: initialize the values when the application first launches; step 3: process write data to the queue; step 4: detect the threshold and process the data in the queue; step 5: remove processed data from the queue; step 6: monitor queue and early warn.Type: ApplicationFiled: October 26, 2021Publication date: April 28, 2022Applicant: VIETTEL GROUPInventors: Thanh Phong Pham, The Anh Do, Thi Huyen Dang, Viet Anh Nguyen
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Publication number: 20220003528Abstract: The invention proposes the design of a pyrotechnic initiator applied in the aerospace field, including three main components: the housing, the burning bridge and the pyrotechnic dose. The housing has a protective effect and increases the power of the pyrotechnic dose, in which the number of threads and the thread length are calculated to ensure to withstand the fire pressure. The burning bridge generates heat to ignite the ignition dose, the diameter of the bridge is calculated to ensure the resistance of the burning bridge. The pyrotechnic dose consists of 3 ingredient doses, which are the ignition dose, the intermediate dose, and the fire-boosting dose. In which, the mass, composition and density of the doses are calculated to ensure that the required working pressure is created.Type: ApplicationFiled: May 10, 2021Publication date: January 6, 2022Applicant: VIETTEL GROUPInventors: MINH TUAN HOANG, MANH CUONG TRAN, THANH CONG LE, XUAN DOAN DANG, TIEN HOA NGUYEN, VAN HOA LE
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Publication number: 20210409331Abstract: The method for reducing impact of flapping links on performance of network devices is implemented in 3 steps: Step 1: initialize a number of points of the interface to define interface status; Step 2: add a number of points to T and change interface status to isolated; Step 3: the interface comes back to normal state; By all those steps above, the routers can reduce impact of flapping links on route calculation and its performance.Type: ApplicationFiled: December 31, 2020Publication date: December 30, 2021Applicant: VIETTEL GROUPInventors: Hanh Trang Nguyen, Van Huong Tran
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Publication number: 20210373123Abstract: Determining a target's range profiles is an important issue for coastal surveillance radars because it can give us the knowledge about the target, for example, target's type, target's structure and its length along radial direction. Some modern radars nowaday are equipped with the feature of target's range profile extraction, but the results are not accurate due to limitations in processing algorithms. The invention “system and method of determining target's range profiles for coastal surveillance radars” solves the above problem in the direction of proposing a system of technical solutions and associated algorithm improvements.Type: ApplicationFiled: December 30, 2020Publication date: December 2, 2021Applicant: VIETTEL GROUPInventors: Van Loi Nguyen, Thanh Son Le, Trung Kien Tran
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Publication number: 20210375045Abstract: The invention presents a system and a method for digitizing body shape from dressed human image using machine learning and optimization techniques. The invention is able to rapidly and accurately reconstruct human body shape without using costly, bulky and hazardous 3D scanners. Firstly, the system reconstructing human body shape from the dressed human image includes 2 main modules and 2 supplementary blocks, which are: (1) Input Block, (2) Pre-Processing Module, (3) Optimization Module, (4) Output Block. In which, the Pre-Processing Module comprises 4 blocks: (1) Image Standardization, (2) Clothes Classification and Segmentation, (3) Human Pose Estimation, (4) Cloth-Skin Displacement Model. The Optimization Modules comprises 2 blocks: (1) Human Parametric Model, (2) Human Parametric Optimization.Type: ApplicationFiled: December 8, 2020Publication date: December 2, 2021Applicant: VIETTEL GROUPInventors: Xuan Canh Cao, Tien Dat Nguyen, Hai Anh Nguyen, Van Duc Tran
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Patent number: 11187879Abstract: A high magnification MWIR continuous zoom optical system is described herein that consists of the following components: a front detachable extender group, a fixed group for focusing incoming radiation, three moving groups for zooming and generating an intermediate image and a relay group. The mentioned optical system has the ability to work with MWIR radiation (3-5 ?m) and generate a thermal image from the gathered radiation. The system also has the ability to zoom continuously in a wide variable focal length range with a high magnification ratio of 20×. With the use of a cooled detector, the combined system allows its user to be able to receive high quality thermal images in all FOV configurations.Type: GrantFiled: October 30, 2019Date of Patent: November 30, 2021Assignee: VIETTEL GROUPInventors: Xuan Du Dang, Dai Cuong Que, Minh Anh Hoang, Van Tuan Vu, Thanh Dat Vu
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Patent number: 11189939Abstract: The invention relates to a low profile antenna, operating over a wide range of frequencies. The dual-polarized wideband antenna consists of: radiating elements, ground plane, metallic walls, coaxial cables, split-ring slots. The antenna is fed by coaxial cables at feed points, which are surrounded by split-ring slots. The antenna can be utilized as an element in an array to provide particular radiation pattern.Type: GrantFiled: October 30, 2019Date of Patent: November 30, 2021Assignee: VIETTEL GROUPInventors: Hoang Linh Nguyen, Thai Binh Nguyen, Manh Linh Nguyen
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Publication number: 20210364123Abstract: The invention refers to the two-axis direct-drive rotation mechanism for observation device with design drive block inside assembly tilt-axes for a multi-sensor surveillance device used for unmanned vehicles. This is mechanical mechanism performs rotate pan-tilt axis by direct drive motor. This mechanism include of main components: assembly pedestal, assembly pan-axis and assembly tilt-axis. Electronic circuits, encoders, mechanism, motor are optimized arranged and scientific designed the layout space and the weight of the structure. This mechanism can integrate optical sensors such as infrared cameras, high resolution camera, laser rangefinder.Type: ApplicationFiled: May 10, 2021Publication date: November 25, 2021Applicant: VIETTEL GROUPInventors: QUANG TRUNG TRINH, TIEN HAI TRAN, DUY NHAT TRAN
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Publication number: 20210366663Abstract: The invention offers an ultracapacitor-based power system solution with four main functional blocks which are power conditioning block, monitoring block, charge-discharge block and protection block. The proposed system has the advantage of working well in the environment of vibration, high temperature, has a large capacity to provide a large amount and radiates less heat compared to systems using traditional batteries. In addition, the system has functions to protect and stabilize the output voltage, and the operating parameters of the system is monitored continuously.Type: ApplicationFiled: May 10, 2021Publication date: November 25, 2021Applicant: VIETTEL GROUPInventors: TRUONG GIANG DUONG, CANH DUONG NGUYEN, DUC ANH NGUYEN, XUAN CHIEN VUONG, PHUONG NAM TRAN
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Publication number: 20210364358Abstract: The invention proposed the thermal imaging radar includes of main components: Assembly pedestal, Assembly rotary shaft, and Assembly housing. Electronic circuits, encoders, mechanisms, motor are optimized arranged and scientifically designed the layout space and the weight of the structure. This device is compact for camouflage purposes, easy to assemble or disassemble, and waterproof. The invention's products can be applied in automatic security station, produces 360-degree panoramic imaging of the continuously day and night for surveillance area, detects and tracks moving objects captured by the thermal sensor. Furthermore, The product is also applicable for monitoring the ambient temperature in large areas, localizing high-temperature areas to recognize and warn the possible explosions.Type: ApplicationFiled: May 10, 2021Publication date: November 25, 2021Applicant: VIETTEL GROUPInventors: DUY NHAT TRAN, TIEN HAI TRAN, QUANG TRUNG TRINH, ANH DAN DO
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Publication number: 20210274596Abstract: An Automated Analysis and Warning of Optical Transmission (AWOT) between BBU unit and RRU of radio transmitting station accurately and quickly identifies errors on an optical transmission line, thereby reducing costs in terms of labor and equipment, and at the same time reducing service downtime of mobile communication systems.Type: ApplicationFiled: December 30, 2020Publication date: September 2, 2021Applicant: VIETTEL GROUPInventors: Tien Sang Nguyen, Ngoc Quy Le, Truong Giang Le, Xuan Thang Nguyen
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Publication number: 20210273344Abstract: A broadband dual-polarized antenna integrated high-performance balun. The antenna structure consists of three main parts: radiator, feeding structure and reflector. The radiation element consists of four radiation parts with petal shape, forming two pairs of orthogonal dipole antennas. The feeding structure consists of four circuit boards with separated lines, forming resonant structures corresponding to a balance transformer. The reflector enables to direct the beam, increasing the antenna's orientation.Type: ApplicationFiled: December 30, 2020Publication date: September 2, 2021Applicant: VIETTEL GROUPInventors: Cong Kien Dinh, Hoang Linh Nguyen, Tien Manh Nguyen, Ba Dat Nguyen
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Publication number: 20210272034Abstract: The method of fragmentation of large files applied to the problem of updating phone numbers according to the proposed invention helps to solve the problem of increasing the speed of reading/writing/updating/deleting large files, solving solving issues of getting a high load of interactive examination with a data file sized in the millions of records, including the steps: step 1: read the configuration data from the table in the database, save the data structure for processing; step 2 receive the request; step 3: read the file and split the work; step 4: handle concurrent interaction with sub-files.Type: ApplicationFiled: December 11, 2020Publication date: September 2, 2021Applicant: VIETTEL GROUPInventor: Van Chung Trinh
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Publication number: 20210273309Abstract: The invention proposes a four-port coupler using micro-strip line in combination with ultra-wide-band compensation circuits. It can be applied for communication systems or information machine systems. The main feature of the invention is the structure and the distribution of the components in the compensation circuit to reduce the size of the coupler. The proposed coupler includes: microstrip directional coupler and compensation circuits, in which the microstrip directional coupler consists of one main line and two secondary transmission lines; the main transmission line has two ports: input and output ports; each secondary is connected to a load and a compensation circuit. The compensation circuit is composed of a low-pass filter and two parallel attenuation regulator circuits.Type: ApplicationFiled: December 30, 2020Publication date: September 2, 2021Applicant: VIETTEL GROUPInventors: Cong Kien Dinh, Hoang Linh Nguyen, Tien Manh Nguyen, Duc Phu Phung, Ba Dat Nguyen