Cognitive Radio Network for E-Health Systems

2. Background Study

Use of cognitive radios in the healthcare industry is an intriguing topic. Many researchers have proposed various architectures for implementing a cognitive radio based e-health application. Phunchongharn, Hossain, Niyato, and Camorlinga (2010) addressed the technological requirements of a cognitive radio based wireless system in terms of electromagnetic compatibility, data security, and seamless connectivity. Further, they also put forward an architecture for implementing a cognitive radio based e-health application in which they divided the wireless devices into two categories viz. primary devices and secondary devices which use an EMI-aware handshaking protocol for accessing the wireless channel. Finally, performance evaluation of the system is carried out using simulations. Mamoon, Muzahidul-Islam, Baharun, Komaki, and Ahmed (2015) proposed an architecture for a cognitive radio based e-health application in which all the wireless devices are capable of dynamic spectrum access. They proposed a three layer model, where a cognitive base station (CBS) occupies the first layer, all the wireless devices and sink access control form the middle layer, and cognitive radio aided sensor network forms the bottom layer. Luan and Ren (2015) discuss the complete design of an e-health network including the design for the physical layer, MAC layer, and the transport layer. Some researchers have performed a detailed analysis of wearable body sensors and their wireless transmissions, and have suggested EMI-aware cognitive radio based architectures for Wide Body Area Network (WBAN) (Shen, Liu, Yu, Ma, Li, Shen, & Chen, 2013; Chávez-Santiago, Jankunas, Fomin, & Balasingham, 2014).