Optimizing airway network efficiency with the A-star algorithm: a case study of Ho Chi Minh FIR

DOI: https://doi.org/10.3846/aviation.2025.23635

Abstract

Airway network optimization is crucial for airspace planning, addressing high traffic density and alleviating pressure on Air Traffic Controllers. With the rapid growth of civil aviation, overloaded airways and congestion have become significant challenges. Vietnam’s air transport sector plays a vital role in economic and social development, enhancing connectivity across the Asia-Pacific region. Additionally, Vietnam has led the global recovery of domestic aviation post-COVID-19 and, as the world’s fifth fastest-growing aviation market, is expected to reach 150 million air transport passengers by 2035. This highlights Vietnam’s dynamic growth and strategic importance within global aviation. However, this rapid expansion has exposed vulnerabilities in Vietnam’s airways, particularly within the Ho Chi Minh Flight Information Region (HCM FIR), where congestion and overload are evident, especially during adverse weather. To address these challenges, this study proposes optimizing the airway network in 2D space using the A-star algorithm, tailored for the HCM FIR. This approach aims to reduce flight distances, improve operational efficiency, and ease ATC workloads, marking a critical step toward enhancing Vietnam’s airspace management system.

Keywords:

airway network optimization, 2D space, Ho Chi Minh Flight Information Region, A-star algorithm, flight distance, prohibited and restricted areas, airspace

How to Cite

Nguyen, N. H. Q., Vu, T. H. A., Le, H. M., Nguyen, M. P., Le, T. T. T., Nguyen, T. T. T., & Nguyen, N. N. Y. (2025). Optimizing airway network efficiency with the A-star algorithm: a case study of Ho Chi Minh FIR. Aviation, 29(2), 104–117. https://doi.org/10.3846/aviation.2025.23635

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June 10, 2025
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References

Altamiranda, A. M. S. (2019). Algorithms for multi-objective mixed integer programming problems [Doctoral dissertation, University of South Florida]. https://digitalcommons.usf.edu/etd/8685/

Alves, M. J., & Clímaco, J. (2008). Multi-objective mixed integer programming. In C. Floudas & P. Pardalos (Eds.), Encyclopedia of optimization (pp. 2454–2460). Springer. https://doi.org/10.1007/978-0-387-74759-0_421

Asian Aviation. (2024, January-February). Crowded skies Asia Pacific country need to work together to safely manage air traffic. https://asianaviation.com/wp-content/uploads/AAV_Jan-Feb_2024_Single-page.pdf

Auh, E., Kim, J., Joo, Y., Park, J., Lee, G., Oh, I., Pico, N., & Moon, H. (2024). Unloading sequence planning for autonomous robotic container-unloading system using A-star search algorithm. Engineering Science and Technology, an International Journal, 50, Article 101610. https://doi.org/10.1016/j.jestch.2023.101610

Beeker, E. (2004). Potential error in the reuse of Nilsson’s A algorithm for path-finding in military simulations. The Journal of Defense Modeling and Simulation, 1(2), 91–97. https://doi.org/10.1177/875647930400100203

Candra, A., Budiman, M. A., & Pohan, R. I. (2021). Application of A-star algorithm on pathfinding game. Journal of Physics: Conference Series, 1898(1), Article 012047. https://doi.org/10.1088/1742-6596/1898/1/012047

Chatzisavvas, A., Dossis, M., & Dasygenis, M. (2024). Optimizing mobile robot navigation based on A-star algorithm for obstacle avoidance in smart agriculture. Electronics, 13(11), Article 2057. https://doi.org/10.3390/electronics13112057

Dancila, R. I., & Botez, R. M. (2021). New flight trajectory optimisation method using genetic algorithms. The Aeronautical Journal, 125(1286), 618–671. https://doi.org/10.1017/aer.2020.138

Emani, M. E., Coulibaly, A., Diagne, S. G., Haouba, A. O., & Mby, A. N. (2022). Optimization of a route network in Dakar airspace: Surface navigation. American Journal of Operations Research, 12, 64–81. https://doi.org/10.4236/ajor.2022.122004

Farrahi, A. H., Goldberg, A. T., Bagasol, L., & Jung, J. (2017). Applying graph theory to problems in air traffic management. In 17th AIAA Aviation Technology, Integration, and Operations Conference. Aerospace Research Central. https://doi.org/10.2514/6.2017-3775

Gopalakrishnan, K., & Balakrishnan, H. (2021). Control and optimization of air traffic networks. Annual Review of Control, Robotics, and Autonomous Systems, 4, 397–424. https://doi.org/10.1146/annurev-control-070720-080844

Hart, P. E., Nilsson, N. J., & Raphael, B. (1968). A formal basis for the heuristic determination of minimum cost paths. IEEE Transactions on Systems Science and Cybernetics, 4(2), 100–107. https://doi.org/10.1109/TSSC.1968.300136

International Air Transport Association. (2023). Quarterly air transport chartbook (IATA sustainability & economics Q2 2023). https://www.iata.org/en/iata-repository/publications/economic-reports/quarterly-air-transport-chartbook/

Jurkiewicz, P., Biernacka, E., Domżał, J., & Wójcik, R. (2021). Empirical time complexity of generic Dijkstra algorithm. In 2021 IFIP/IEEE International Symposium on Integrated Network Management (IM). Bordeaux, France. https://doi.org/10.48550/arXiv.2006.06062

Lee, U.-J., Ahn, S.-J., Choi, D.-Y., Chin, S.-M., & Jang, D.-S. (2023). Airspace designs and operations for UAS traffic management at low altitude. Aerospace, 10(9), Article 737. https://doi.org/10.3390/aerospace10090737

Lerner, J, Wagner, D., & Zweig, K. A. (2009). (Eds.). Algorithmics of large and complex networks. Lecture Notes in Computer Science, 5515, 117–139. https://doi.org/10.1007/978-3-642-02094-0

Li, J., Yu, C., Zhang, Z., Sheng, Z., Yan, Z., Wu, X., Zhou, W., Xie, Y., & Huang, J. (2023). Improved A-star path planning algorithm in obstacle avoidance for the fixed-wing aircraft. Electronics, 12(24), Article 5047. https://doi.org/10.3390/electronics12245047

Li, Y., Zhang, Y., & Feng, B. (2020). A design for crossing waypoints location in air route network based on genetic algorithm. In 2020 IEEE 9th Joint International Information Technology and Artificial Intelligence Conference (ITAIC) (pp. 827–832). IEEE. https://doi.org/10.1109/ITAIC49862.2020.9339163

Liu, H., & Zhang, Y. (2022). ASL-DWA: An improved A-star algorithm for indoor cleaning robots. IEEE Access, 10, 99498–99515. https://doi.org/10.1109/ACCESS.2022.3206356

Liu, Z., Liu, H., Lu, Z., & Zeng, Q. (2021). A dynamic fusion pathfinding algorithm using Delaunay triangulation and improved A-star for mobile robots. IEEE Access, 9, 20602–20621. https://doi.org/10.1109/ACCESS.2021.3055231

Maristany de las Casas, P., Sedeño-Noda, A., & Borndörfer, R. (2021). An improved multiobjective shortest path algorithm. Computers & Operations Research, 135, Article 105424. https://doi.org/10.1016/j.cor.2021.105424

Mehmood, D., Ali, A., Ali, S., Kulsoom, F., Chaudhry, H. N., & Haider, A. Z. U. (2024). A novel hybrid genetic and A-star algorithm for UAV path optimization. In 2024 IEEE 1st Karachi Section Humanitarian Technology Conference (KHI-HTC) (pp. 1–5). IEEE. https://doi.org/10.1109/KHI-HTC60760.2024.10482095

Nazarifard, M., & Bahrepour, D. (2017). Efficient implementation of the Bellman-Ford algorithm on GPU. In 2017 IEEE 4th International Conference on Knowledge-Based Engineering and Innovation (KBEI) (pp. 773–778P). IEEE. https://doi.org/10.1109/KBEI.2017.8324901

Neretin, E. S., Nguyen, Th. L. P., & Nguyen, N. H. Q. (2022). An analysis of human interaction and weather effects on aircraft trajectory prediction via artificial intelligence. In XIX Technical Scientific Conference on Aviation Dedicated to the Memory of N.E. Zhukovsky (TSCZh) (pp. 85–89). IEEE. https://doi.org/10.1109/TSCZh55469.2022.9802458

OAG Aviation Worldwide Limited. (2024, December 17). The busiest flight routes of 2024. https://www.oag.com/busiest-routes-world-2024

Rani, P. S., & Owais, S. M. (2021). Application of graph theory in air-transportation network. Journal of Pure and Applied Mathematics, 5(1), 1–4.

Shahi, G. S., Batth, R. S., & Egerton, S. (2020). A comparative study on efficient path finding algorithms for route planning in smart vehicular networks. International Journal of Computer Networks and Applications (IJCNA), 7(5). https://doi.org/10.22247/ijcna/2020/204020

Skrypnik, O. N., Netchaev, E. E., Arefyeva, N. G., & Arefyev, R. O. (2019). Algorithms for aircraft track optimization in flexible routing. ITM Web of Conferences, 30, Article 03003. https://doi.org/10.1051/itmconf/20193003003

Su, G., Cheng, X., Feng, S., Liu, K., Song, J., Chen, J., Zhu, C., & Lin, H. (2024). Flight path optimization with optimal control method. In 2024 IEEE 27th International Conference on Intelligent Transportation Systems (ITSC). IEEE. https://doi.org/10.1109/ITSC58415.2024.10919698

Taniguchi, E., Thompson, R. G., Yamada, T., & Van Duin, R. (2001). City logistics: Network modelling and intelligent transport systems. Elsevier. https://doi.org/10.1108/9780585473840

Van Rossum, G., & Drake, F. L. (2009). Python 3 reference manual. CreateSpace.

Vietnam Air Traffic Management Corporation. (2017, August 22). Gia tăng lưu lượng hoạt động bay và yêu cầu triển khai thực hiện quản lý luồng không lưu [Rising air traffic intensity and the imperative of implementing air traffic flow management]. https://vatm.vn/gia-tang-luu-luong-hoat-dong-bay-va-yeu-cau-trien-khai-thuc-hien-quan-ly-luong-khong-luu-n4735.html

Vietnam Air Traffic Management Corporation. (2019, December 2). Vùng thông báo bay Hồ Chí Minh (FIR HCM) – Một phần tư thế kỷ ổn định và phát triển [Ho Chi Minh Flight Information Region – A quarter-century of stability and development]. VATM. https://vatm.vn/vung-thong-bao-bay-ho-chi-minh-fir-hcm-mot-phan-tu-the-ky-on-dinh-va-phat-trien-n5744.html

Vietnam Air Traffic Management Corporation. (2024, November). Aeronautical information publication. https://www.vnaic.vn/images/stories/vnaic.vn/SanPhamDichVu/AIPVietNam/AIP/history-en-GB.html

Vietnam Aeronautical Information Centre. (2021, October). Air traffic services airspace. https://www.vnaic.vn/images/stories/vnaic.vn/SanPhamDichVu/AIPVietNam/Related%20Links/2023-01-AMDT/html/eAIP/ENR-2.1-en-GB.html

Xu, N., Wu, X., Zhang, M., & Chang, X. (2024). Solve the constrained shortest path problem using an improved A* algorithm. In 2024 7th International Conference on Advanced Algorithms and Control Engineering (ICAACE) (pp. 78–81), Shanghai, China. IEEE. https://doi.org/10.1109/ICAACE61206.2024.10548814

Zhou, Y., Cheng, X., Lou, X., Fang, Z., & Ren, J. (2020). Intelligent travel planning system based on A-star algorithm. In 2020 IEEE 4th Information Technology, Networking, Electronic and Automation Control Conference (ITNEC) (pp. 426–430). IEEE. https://doi.org/10.1109/ITNEC48623.2020.9085072

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2025-06-10

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How to Cite

Nguyen, N. H. Q., Vu, T. H. A., Le, H. M., Nguyen, M. P., Le, T. T. T., Nguyen, T. T. T., & Nguyen, N. N. Y. (2025). Optimizing airway network efficiency with the A-star algorithm: a case study of Ho Chi Minh FIR. Aviation, 29(2), 104–117. https://doi.org/10.3846/aviation.2025.23635

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