1. Introduction
As the advance of wireless communication techniques and mobile computing technologies, wireless networks have strengthened the research, development and the use of different wireless networks towards the Future Internet [1]–[3]. Moreover, the widespread ownership of mobile devices and the growth of mobile communications industry has provided services such as personal and group communication, location-aware information delivery and personalized assistance based on users’ preferences and needs, as well as ubiquitous communication and interaction with smart devices and objects [4].