Distributed call setup and rerouting are realized in a mobile-communications network. A connection tree is set up within the network, e.g., upon a mobile user accessing a base station. The connection tree comprises communication routes from a fixed point in the network, the root of the tree, to each...http://www.google.se/patents/US5528583?utm_source=gb-gplus-sharePatent US5528583 - Method and apparatus for supporting mobile communications in mobile communications networks
