公开(公告)号：US09686657B1

公开(公告)日：2017-06-20

申请号：US15320000

申请日：2014-07-10

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Kang-Kai Zhao ,  Da-Jun Chen ,  Yong Li ,  Yong Tian ,  Wu Yang

IPC: H04W76/00 ,  H04W4/10 ,  H04W74/08 ,  H04W84/08

CPC classification number: H04W4/10 ,  H04W74/0808 ,  H04W84/08

Abstract: A mobile radio has selectable transmit and receive channels, and is in a talkgroup that has a primary channel and multiple auxiliary channels. The mobile radio receives a broadcast-start command, and responsively selects its transmit channel to be the primary channel (if available) or an inactive auxiliary channel (if the primary channel is not available). The mobile radio receives user media via its user interface, and transmits that received user media on its selected transmit channel. The mobile radio scans for an auxiliary channel transitioning from inactive to active. Responsive to detecting such a transition, the mobile radio selects that auxiliary channel as its receive channel. The mobile radio mixes inbound media received on its selected receive channel with user media received via its user interface, and transmits the mixed media on its selected transmit channel.