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.