Multicast TV over WLAN in a University Campus Network

One of the multimedia services offered by the campus network of the Polytechnic University of Valencia is TV over IP. This service works well in the devices connected directly to the wired network but we have detected some problems when the receivers access to the campus network through wireless IEEE 802.11, especially when devices roam across the campus. In this paper we propose and evaluate a server-based solution to minimize the packet loss and reduce the lack of service when the mobile devices roam from an access point to another access point in the wireless network. This solution uses a location system to modify the behaviour of standard multicasting protocols in order to get a near-seamless multicast WiFi roaming.