Techniques are disclosed for establishing packet-based communication between first and second endpoints over a network, in a manner which reduces the latency and complexity associated with call setup. In accordance with one aspect of the invention, a resource is requested from the network utilizing a...http://www.google.de/patents/US7428216?utm_source=gb-gplus-sharePatent US7428216 - Method and apparatus for policy and admission control in packet-based communication systems
