Ubiquitous video streaming through wireless overlay networks

With the availability of various wireless link-layer technologies, such as Bluetooth, WLAN and GPRS, in one wireless device, ubiquitous communications can be realized through managing vertical handoff in the environment of wireless overlay networks. In this paper, we develop a ubiquitous video streaming system through wireless overlay networks. One of the main features of the developed system is that it can support seamless communications. In other words, the developed system enables wireless devices to roam among different wireless networks without affecting the ongoing multimedia applications. Another feature is that our developed video streaming application can be adaptively adjusted to match the significant change of wireless link characteristics due to vertical handoff. Our contribution lies in the integration of various existing techniques to build a real system.