an, Muhammad Moinuddin, Abdulrahman U. Alsaggaf, and Ubaid M. Al-Saggaf Chapter 4 5G Enabled Network Technology Trends for Smart Healthcare Systems Satyanand Singh Chapter 5 Non-Orthogonal Multiple Access Transmission for 5G Technology: Practical Considerations Ibrahim Almujtaba and Abdulah Aljohani Chapter 6 Comparisons of UTD-PO and FKE Models for Path Loss Prediction over an Irregular Terrain Yashu Shanker and D. K. Lobiyal Chapter 7 Integrated Blockchain and MEC Systems Empower Healthcare Services Amira A. Amer and Tawfik Ismail Contents Chapter 8 Optimized Cognitive Radio Networks for 5G Technology Mohammed Ali Ahmed Alrefaei, Ubaid M. Al-Saggaf, Muhammad Moinuddin, and Asmaa U. Al-Saggaf Chapter 9 Gamified Wearables in Childhood Obesity Therapy Driven by 5G Wireless Communication System with Special Emphasis on Pacific Island Countries Pragya Singh Chapter 10 The Role of Photonics for the Realization of Future 6G Communication Systems Kamal Kishor Choure, Manisha Prajapat, Ankur Saharia, Nitesh Mudgal, Manish Tiwari, Puspa Devi Pukhrambam, and Ghanshyam Singh Chapter 11 MIMO Antennas for IoT and ISM Band Applications Inderpreet Kaur, Hari Kumar Singh, Sanjeev Sharma, Navneet Singh, and Yash Bhardwaj Chapter 12 The Role of Terahertz Photoconductive Antennas in Future Healthcare Informatics Shyamal Mondal, E. Nisha Flora Boby, and Vaisshale Rathinasamy Index Preface The Role of 5G Communication and Healthcare Informatics is an emerging field of research at the intersection of information science, computer science, mobile com- munication systems, digital health and healthcare informatics. Healthcare informatics and analytics is a new era that brings tremendous opportunities and challenges due to plenty of easily available medical data for further analysis. The aim of wireless com- munication in healthcare informatics is to ensure high-quality, efficient healthcare, better treatment, and quality of life by efficiently analyzing abundant medical and healthcare data, including patient's data, electronic health re