Patent ID: 6298058
Filing Date: 2001-10-02
Classification: H04L,H04W

Abstract:
In a communication system including a plurality of communication devices participating in an active talkgroup call, the active talkgroup call defining a first payload transmitted from a first communication device to one or more network devices and addressed to a first payload multicast group address, the communication devices having joined the first payload multicast group address to receive the first payload from the one or more network devices, a method comprising:receiving, from a second communication device, a request to transmit during the active talkgroup call;identifying a second payload multicast group address to be used for distributing payload from the second communication device during the active talkgroup call, the payload from the second communication device defining a second payload;leaving, by a first group of the communication devices, the first payload multicast group address;joining, by the first group of the communication devices and a second group of communication devices, the second payload multicast group address;sending, from the second communication device to the one or more network devices, the second payload addressed to the second payload multicast group address; andsending the second payload from the one or more network devices to the first and second group of communication devices joined to the second payload multicast group address.