Patent ID: 6882856

Claim:
A method for establishing a dynamic talk group in a radio communication system, comprising the steps of: (a) selecting a set of target radios from amongst a plurality of subscriber radios by a dynamic group call originator, each one of the plurality of subscriber radios having a unique Internet Protocol (IP) address, the dynamic group call originator being a subscriber radio located in the radio communication system; (b) querying a dispatch database to determine a current location area for each one of the plurality of subscriber radios in the set of target radios; (c) transmitting a message from the dynamic group call originator to each of the set of target radios whose IP addresses match those radios selected in step (a), the message containing a dynamic talk group number; and (d) causing the target radios and the dynamic group call originator to establish a dynamic talk group where the dynamic group call will take place, using the dynamic talk group number.