A method and system that employs a proxy server associated with a mobile
device in a wireless network, wherein the proxy server monitors whether
the mobile device is still in coverage. The media service operates on top
of a connectionless peer-to-peer packet-based transport protocol. If the
proxy server detects that the device has lost coverage for more than a
predetermined length of time, then it sends an out-of-coverage message to
the other termination point engaged in the media service. The
out-of-coverage message may instruct the termination point to release or
cancel the service.