Timuçin, TunahanBayrakdar, SümeyyeTimuçin, Ezgi KaraBayrakdar, Muhammed Enes2025-10-112025-10-1120251530-437Xhttps://doi.org/10.1109/JSEN.2025.3598065https://hdl.handle.net/20.500.12684/21330In this paper, a cognitive radio medical sensor network based on smart contract is proposed for secure communication in field hospitals. Field hospitals usually utilize cognitive radio based opportunistic networks for health data transmissions due to extraordinary sudden occasions. And, cognitive radio based opportunistic networks is prone to risks. So, security is a crucial factor for opportunistic networks in cognitive process such as spectrum sensing [1]. Secure data transmission is very important for patient related sensed data in field hospitals. Failure to transmit, or incorrect transmission of values such as vitamin levels, glucose levels in the blood can critically impact the treatment applied to the patient [2]. In our network structure, sensor nodes use the carrier sense multiple access (CSMA) technique for medical communication. Utilizing our smart contract based approach, security measures were taken in the field hospital environment. Since secure communication is crucial in field hospitals, a smart contract-based data sensing approach is proposed to enhance network security. Sensor nodes are placed to cover the whole region to sense parameters. The values sensed by the sensor nodes were composed by the base station. The simulation model of our proposed approach was implemented using Riverbed Modeler software. Owing to our proposed smart contract based approach for cognitive medical sensor networks, the field hospital environment was supervised securely with wireless sensor nodes. © 2025 Elsevier B.V., All rights reserved.en10.1109/JSEN.2025.3598065info:eu-repo/semantics/closedAccessBlockchainCognitive RadioField HospitalMedical Sensor NetworkSmart ContractCognitive SystemsComputer SoftwareData Communication SystemsHospitalsMobile SecurityMobile Telecommunication SystemsNetwork SecurityPatient TreatmentRadioRadio SystemsSensor NodesSmart ContractBlock-chainData-transmissionField HospitalsHealth DataHospital EnvironmentIn-fieldMedical Sensor NetworksNetwork-basedRadio SensorsSensor Network SecurityCognitive RadioArticle2-s2.0-105014548969Q1