-    Mastering the technology of designing and manufacturing mobile GSM/GPRS mobile network with components, including: base station, switch, trunk connected to public network via IP/PSTN/VSAT network, can use a regular cell phone SIM.
-    Research on general design of a dedicated BTS station with compact size. The solution of the topic is to use the OpenBTS platform, which is the full protocol system of a complete GSM cell implemented by software.
-    Research and design a dedicated BTS station with the ability to quickly deploy and operate independently. The solution of the topic is to study the integration of satellite connections for BTS stations. Based on the research on satellite communication systems in relaying for mobile networks, the objective is to research, design, manufacture and integrate satellite relay modules for BTS stations.

Theoretical results: Research, design and manufacture mobile GSM/GPRS mobile network with components, including: base station, switch, trunk connected to public network via IP/PSTN/VSAT network, can use a regular mobile phone SIM.
Applied results: Researching and testing a dedicated BTS station with the ability to quickly deploy and operate independently, integrating satellite connection.

-    Theoretical study of BTS station construction technologies and local network establishment in mobile communication systems. Researching technologies and solutions for manufacturing a compact and highly portable BTS station as a basis for researching and proposing solutions for manufacturing BTS stations based on the Open BTS platform, softening network functions cores and transceiver hardware based on SDR technology to integrate hardware designs on the same board. The objective of the project is to design 02 mini BTS stations with switching and trunking functions to connect subscribers in the coverage area into a local network. At the same time, the BTS product of the project is also capable of connecting to the public carrier via IP/PSTN/VSAT network to become a device to expand mobile coverage in cases of rescue, emergency or emergency. in remote areas. The objective of the project is that the system achieves the minimum technical requirements such as: serving 8-16 GSM/GPRS subscribers simultaneously, coverage radius from 0.5 to 1Km depending on terrain conditions. . These minimum goals have all been achieved and verified in the field
-    Theoretical research and experimental design of radio transceiver circuitry for mobile stations based on SDR technology. Specifically, using FPGA technology to design central processing blocks and signal processing modules, capable of communicating with peripheral blocks such as radio communication blocks, external memory blocks and debugging blocks. The obtained results show that the FPGA IC has worked well with basic features and integrated well with other modules to form a complete BTS product.
-    Theoretical research and integration of hardware modules connecting satellites, relaying signals from mobile BTS stations to public networks. Configure connection parameters, build equipment installation and calibration procedures
-    Develop software system to monitor, manage and control core functions of BTS integrated installed in the embedded computer system. Software modular systems are divided into two types:
• Core functional software modules: MSC, HLR, VLR, SMSC, EIR and AUC
• System-wide software modules: Monitor, control the system, configure functions of voice, SMS, user management, PSTN network communication, satellite communication, power activity monitoring.
-    Testing a dedicated BTS station with the ability to quickly deploy and operate independently, with integrated satellite connection in Quang Nam Province.

-    Scientific papers in referced journals (list):
+ Cao Dung Truong, Cuong Nguyen Le, Duy Hai Ta, Hang Duy Nguyen Thi, Trung Hieu Nguyen, and Hoang Chu Duc "Compact and low-loss 90-deg optical hybrid based on silicon-on-insulator 2 × 2 multimode interference couplers," Optical Engineering 59(9), 095108 (25 September 2020). https://doi.org/10.1117/1.OE.59.9.095108.
+ Nguyễn Việt Hưng và Đặng Anh Tuấn, “Giải pháp giảm ảnh hưởng tương hỗ cho anten MIMO ứng dụng trong liên lạc vệ tinh di động” trên Tạp chí Khoa học Công nghệ Thông tin và Truyền thông, Số 1, năm 2021.
-    Patents (list): Acceptance of application for utility solution: Small mobile BTS station with satellite connection according to Decision No. 7336w/QD-SHTT dated May 7, 2021,
-    Technological products (describe in details: technical characteristics, place):

• Small-sized mobile communication network with satellite connection, including: 02 mini BTS stations, switches, trunks connected to the public network via IP/PSTN/VSAT network
• Set of design documents, manufacturing process of mini BTS station and accompanying software
• User Manual
• Signal processing software system
• System monitoring, management and control software modules
• System database management software modules
• Report test results under real conditions