The invention relates to a method, device (MS, BTS, GSN) and telecommunication network for avoiding collisions in time divided two-way radio communication, in which messages are transmitted in a first communication direction in a first time slot and in a second opposite communication direction in a second...http://www.google.de/patents/US5966378?utm_source=gb-gplus-sharePatent US5966378 - Method, device and communication network for avoiding collisions in radio communication
