公开(公告)号：US20170303318A1

公开(公告)日：2017-10-19

申请号：US15507343

申请日：2014-12-24

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： KANG-KAI ZHAO ,  DA-JUN CHEN ,  YA-HUI GONG ,  YI TANG ,  YONG TIAN ,  WU YANG ,  DONG ZHAO

IPC: H04W76/00 ,  H04W4/08

CPC classification number: H04W76/45 ,  H04W4/08 ,  H04W4/10

Abstract: Disclosed herein are methods and systems for patching direct-mode talkgroups among dual-watch mobile radios. A mobile radio has first and second receivers, and is in a first talkgroup having a first channel. The mobile radio resides the first receiver on the first channel, and detects either a first patch event or a second patch event. The first patch event is an instruction for a first-channel session. The second patch event is an invitation for a second-channel session. Upon detecting the first patch event, the mobile radio transmits an invitation on the first channel and also on one or more other channels respectively associated with one or more other talkgroups, directing all recipients to the first channel. If the mobile radio detects the second patch event, the mobile radio resides the second receiver on the second channel.

公开(公告)号：US20170290032A1

公开(公告)日：2017-10-05

申请号：US15507269

申请日：2014-11-13

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： KANG-KAI ZHAO ,  DA-JUN CHEN ,  YONG LI ,  YONG TIAN ,  WU YANG

IPC: H04W72/12 ,  H04W4/02 ,  H04W4/10

CPC classification number: H04W72/121 ,  H04J3/1694 ,  H04W4/02 ,  H04W4/029 ,  H04W4/10 ,  H04W84/08

Abstract: A subscriber device joins a talk group and receives, via a control channel, parameters defining a plurality of assigned downlink data transmission periods associated with the talk group on a downlink short data channel. The subscriber device determines from the parameters when a next downlink short data transmission for devices in the talk group will be transmitted on the downlink short data channel. The subscriber device switches to the downlink short data channel during the next transmission period.