Journal of Digital Information Management Shiow-Yuan Huang, Cheng-Chan Hung, Cheng-Chi Lee 9 2 2011 http://www.dline.info/fpaper/jdim/v9i2/6.pdf As a consequence of rapid technological de-velopment, the normally isolated medical sensor platform is gradually being integrated into networks. However, most ubiq-uitous or mobile health systems are lacking a system that com-bines both network security and QoS (Quality of Service). This paper investigates the possible security and QoS methods of a ubiquitous healthcare network platform in OSI (Open System Interconnections)-layers. This network platform is based on the Wireless Overlay Networks (WON) Bluetooth, 802.11 and 802.16 over IPv6 network, and provides a secure and stable U-healthcare platform by including the application of healthcare sensors with RFID, U-healthcare PDA, VoIPv6, falling detection, and patient orientation.