During the course of a push-to-talk talkgroup wireless communication, decisions (21) are made regarding possible subsequent push-to-talk communication needs for the group. Based at least in part upon such decisions, a network location is identified (22) to provide talker arbitration support for this...http://www.google.es/patents/US7558589?utm_source=gb-gplus-sharePatente US7558589 - Talker arbitration method and apparatus
