Among the living organisms, the most important metabolic process is health, or what we can say as the power of living and the basic right to get quality healthcare. In the coming era, the internet will play an important role in monitoring and executing the issues related to the health system of humans through automated sensor response using IoT. IoT connects device to device, things to things, as well as the human body to the network system through the sensors. It can be used to monitor human health-related issues like sugar level, blood pressure level, fever and keep track of a patient's pulse rate and any disease that may be harmful to human life. Today, due to a lack of resources in the world, people are facing many problems related to health.
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The good Health quality is the primary requirement of human being. In the principle of the World Health Organization (WHO), health is expressed as a better bonding between the various beings like physical, mental and social-well-being, rather than only the absence of physical inabilities.”(Kalarthi, Z. M. 2016) (Salahuddin, M. A. et al. 2018). This paper presents the traditional u-healthcare system in Internet of Things (IoT) environment using the mobile gateway. The Internet of Things connects different devices such as mechanical and digital, objects to object, animals or people to communicate and transfer data without intervention of human to human and human to computer. The health condition of human is most important segment during human lifetime. But current generation people can suffer in many diseases such as heart related problem, COVID-19, blood pressure and any chronic disease in any time but it is not possible by all for immediate consult to the doctor at any time due to unavailability of doctor for the increasing population (Singh, D. et al. 2020). At the critical conditions when doctors and treatment both are unavailable for all the patients, those who are living in remote locations leads to many problems (Gelogo, Y. E. et al. 2015) (Dewangan, K. et al. 2018).
Remote health monitoring and emergency notification can be enabled through the IoT system. Blood pressure, any chronic disease, and heart rate can all be monitored remotely using specialised sensors in a remote health monitoring system (Khamparia, A. et al. 2021). for senior citizens, a specialized sensor needs to be fitted in the body of the human to monitor the health care system, which will assure and secure proper treatment to regain the loss of mobility.
Wearable gadgets have piqued the interest of both the academic and industrial communities. Because of the high degree of curiosity, these devices have become highly common in everyday life. This developed smart wearable health equipment can be linked to the body to observe a person's actions without interfering with or restricting the user's movement (Singla, K. et al. 2021). Wearable devices are small computers that people wear on their bodies, such as clothing, smartwatches, bracelets, wrist bands, or eyewear. Nowadays, there is a smartly equipped fitness device available that can be used to track daily activities. These devices are mostly made up of pedometer sensors, which count the number of steps taken by a person based on hand or hip motion.
The basic goal is to collect sensory data from the body's living organs for local analysis, and then transport the analysed data to a distant medical server (Yeole, A. S. et al. 2016). This can be done by using IoT devices, body sensors such as a smart watch, a smart phone or any Personal Monitoring Device (PMD), a cloud storage platform and encryption algorithm. Through the IOT device, body sensors collect health-related information from the patient's body and transport it to an authentic mobile application, where an encrypting algorithm encrypts the information before it is delivered and stored on the cloud over the internet or through the Wi-Fi module. When data is received by an authentic person's mobile application, it is decrypted using a decryption algorithm (Gelogo, Y. E. et al. 2015) (Kirupa Shankar et al. 2021).