Jiangsu Key Laboratory of Wireless Communications Nanjing University of Posts and Telecommunications Nanjing 210003 China;
Engineering Research Center of Health Service System Based on Ubiquitous Wireless Networks Ministry of Education Nanjing University of Posts and Telecommunications Nanjing 210003 China;
Department of Computer Science and Electronic Engineering University of Essex Colchester CO43SQ U.K.;
Wolfson School of Mechanical Electrical and Manufacturing Engineering Loughborough University Leicestershire LE113TU U.K.;
Jiangsu Key Laboratory of Wireless Communications Nanjing University of Posts and Telecommunications Nanjing 210003 China;
Engineering Research Center of Health Service System Based on Ubiquitous Wireless Networks Ministry of Education Nanjing University of Posts and Telecommunications Nanjing 210003 China;
National Mobile Communications Research Laboratory Southeast University Nanjing 210096 China;
Jiangsu Key Laboratory of Wireless Communications Nanjing University of Posts and Telecommunications Nanjing 210003 China;
Engineering Research Center of Health Service System Based on Ubiquitous Wireless Networks Ministry of Education Nanjing University of Posts and Telecommunications Nanjing 210003 China;