{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,12]],"date-time":"2026-03-12T15:44:01Z","timestamp":1773330241612,"version":"3.50.1"},"reference-count":22,"publisher":"MDPI AG","issue":"13","license":[{"start":{"date-parts":[[2024,7,5]],"date-time":"2024-07-05T00:00:00Z","timestamp":1720137600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Hainan Provincial Natural Science Foundation of China","award":["621QN214"],"award-info":[{"award-number":["621QN214"]}]},{"name":"Hainan Provincial Natural Science Foundation of China","award":["KYQD(ZR)-21012"],"award-info":[{"award-number":["KYQD(ZR)-21012"]}]},{"name":"Scientific Research Startup Fund of Hainan University","award":["621QN214"],"award-info":[{"award-number":["621QN214"]}]},{"name":"Scientific Research Startup Fund of Hainan University","award":["KYQD(ZR)-21012"],"award-info":[{"award-number":["KYQD(ZR)-21012"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Optimizing the deployment of roadside units (RSUs) holds great potential for enhancing the delay performance of vehicular ad hoc networks. However, there has been limited focus on devising RSU deployment strategies tailored specifically for highway intersections. In this study, we introduce a novel probabilistic model to characterize events occurring around highway intersections. By leveraging this model, we analytically determine the expected event reporting delays for both highway segments and intersections. Subsequently, we propose an RSU deployment scheme specifically designed for highway intersections, aimed at minimizing the expected event reporting delay. To implement this scheme, we introduce an innovative algorithm named cooperative walking. Through illustrative examples, we demonstrate that our proposed RSU deployment strategy for highway intersections outperforms the commonly employed uniform RSU deployment scheme and the previously proposed balloon method in terms of delay performance.<\/jats:p>","DOI":"10.3390\/s24134377","type":"journal-article","created":{"date-parts":[[2024,7,5]],"date-time":"2024-07-05T12:30:59Z","timestamp":1720182659000},"page":"4377","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Delay-Oriented Roadside Unit Deployment for Highway Intersections in Vehicular Ad Hoc Networks"],"prefix":"10.3390","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8043-9288","authenticated-orcid":false,"given":"Gan","family":"Luan","sequence":"first","affiliation":[{"name":"School of Information and Communication Engineering, Hainan University, Haikou 570228, China"},{"name":"Hainan Engineering Research Center of Marine Electromagnetic Spectrum, Haikou 570228, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhenjia","family":"Chen","sequence":"additional","affiliation":[{"name":"School of Information and Communication Engineering, Hainan University, Haikou 570228, China"},{"name":"Hainan Engineering Research Center of Marine Electromagnetic Spectrum, Haikou 570228, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chunyi","family":"Yue","sequence":"additional","affiliation":[{"name":"School of Information and Communication Engineering, Hainan University, Haikou 570228, China"},{"name":"Hainan Engineering Research Center of Marine Electromagnetic Spectrum, Haikou 570228, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shi","family":"Guan","sequence":"additional","affiliation":[{"name":"School of Information and Communication Engineering, Hainan University, Haikou 570228, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,7,5]]},"reference":[{"key":"ref_1","first-page":"166","article-title":"Statistical Modeling of Total Crash Frequency at Highway Intersections","volume":"3","author":"Roshandeh","year":"2016","journal-title":"J. Traffic Transp. Eng."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1732","DOI":"10.1016\/j.ssci.2012.03.022","article-title":"Estimating the Safety Performance of Urban Intersections in Lisbon, Portugal","volume":"50","author":"Gomes","year":"2012","journal-title":"Saf. Sci."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"2672","DOI":"10.1109\/TNSM.2021.3069206","article-title":"SINR-Based Analysis of IEEE 802.11 p\/bd Broadcast VANETs for Safety Services","volume":"18","author":"Ma","year":"2021","journal-title":"IEEE Trans. Netw. Serv. Manag."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"393","DOI":"10.1007\/s11277-015-2745-z","article-title":"Comparative Analysis of VANET Routing Protocols: On Road Side Unit Placement Strategies","volume":"85","author":"Ali","year":"2015","journal-title":"Wirel. Pers. Commun."},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Guerna, A., Bitam, S., and Calafate, C.T. (2022). Roadside Unit Deployment in Internet of Vehicles Systems: A Survey. Sensors, 22.","DOI":"10.3390\/s22093190"},{"key":"ref_6","unstructured":"AASHTO (2018). A Policy on Geometric Design of Highways and Streets, American Association of State Highway and Transportation Officials. [7th ed.]."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"1168","DOI":"10.1007\/s10878-016-0029-5","article-title":"Optimal RSUs Deployment with Delay Bound along Highways in VANET","volume":"33","author":"Liu","year":"2017","journal-title":"J. Combin. Optim."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"85","DOI":"10.1016\/j.adhoc.2014.07.022","article-title":"GeoCover: An Efficient Sparse Coverage Protocol for RSU Deployment over Urban VANETs","volume":"24","author":"Cheng","year":"2015","journal-title":"Ad Hoc Netw."},{"key":"ref_9","first-page":"6496","article-title":"An RSU Deployment Strategy Based on Traffic Demand in Vehicular Ad Hoc Networks (VANETs)","volume":"9","author":"Yu","year":"2022","journal-title":"IEEE IoT J."},{"key":"ref_10","first-page":"306","article-title":"Probabilistic Delay and Road Side Unit Placement for Vehicular Ad Hoc Networks with Disrupted Connectivity","volume":"15","author":"Abdrabou","year":"2011","journal-title":"IEEE J. Sel. Areas Commun."},{"key":"ref_11","unstructured":"Chi, J., Jo, Y., Park, H., and Park, S. (2013, January 2\u20135). Intersection-Priority Based Optimal RSU Allocation for VANET. Proceedings of the 2013 Fifth International Conference on Ubiquitous and Future Networks (ICUFN), Da Nang, Vietnam."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"23786","DOI":"10.1109\/ACCESS.2018.2829897","article-title":"Performance Analysis of IEEE 802.11p Safety Message Broadcast with and without Relaying at Road Intersection","volume":"6","author":"Ali","year":"2018","journal-title":"IEEE Access"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"1095","DOI":"10.1007\/s41870-021-00642-w","article-title":"Performance Evaluation of RSUs Deployment at Dense Intersections","volume":"13","author":"Nidhi","year":"2021","journal-title":"Int. J. Inf. Tecnol."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"2295","DOI":"10.1109\/TCOMM.2012.062512.100550","article-title":"A Cost-Effective Strategy for Road-Side Unit Placement in Vehicular Networks","volume":"60","author":"Wu","year":"2012","journal-title":"IEEE Trans. Commun."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"2905","DOI":"10.1007\/s11276-019-02198-x","article-title":"Minimizing Transmission Delays in Vehicular Ad Hoc Networks by Optimized Placement of Road-Side Unit","volume":"26","author":"Ahmed","year":"2020","journal-title":"Wirel. Netw."},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Aslam, B., and Zou, C.C. (2011, January 9\u201312). Optimal Roadside Units Placement along Highway. Proceedings of the 2011 IEEE Consumer Communications and Networking Conference (CCNC), Las Vegasm, NV, USA.","DOI":"10.1109\/CCNC.2011.5766608"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"012104","DOI":"10.1088\/1742-6596\/1804\/1\/012104","article-title":"Enhancing VANET Connectivity through a Realistic Model for RSU Deployment on Highway","volume":"1804","author":"Mousa","year":"2021","journal-title":"J. Phys. Conf. Ser."},{"key":"ref_18","first-page":"179","article-title":"Efficient Deployment of RSUs in Smart Highway Environment","volume":"8","author":"Ge","year":"2019","journal-title":"Int. J. Adv. Smart Converg."},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Zhang, L., Lu, Y., Chen, N., Wang, P., Kong, W., Wang, Q., Qin, G., and Mou, Z. (2023). Optimization of Roadside Unit Deployment on Highways under the Evolution of Intelligent Connected-Vehicle Permeability. Sustainability, 15.","DOI":"10.3390\/su151411112"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"4401","DOI":"10.1109\/TWC.2018.2824832","article-title":"Coverage Analysis of a Vehicular Network Modeled as Cox Process Driven by Poisson Line Process","volume":"17","author":"Chetlur","year":"2018","journal-title":"IEEE Trans. Wirel. Commun."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"1910","DOI":"10.1109\/TVT.2007.901869","article-title":"VADD: Vehicle-Assisted Data Delivery in Vehicular Ad Hoc Networks","volume":"57","author":"Zhao","year":"2008","journal-title":"IEEE Trans. Veh. Technol."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"1538","DOI":"10.1109\/JSAC.2007.071005","article-title":"Routing in Sparse Vehicular Ad Hoc Wireless Networks","volume":"25","author":"Wisitpongphan","year":"2007","journal-title":"IEEE J. Sel. 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