公开(公告)号：US20150031405A1

公开(公告)日：2015-01-29

申请号：US13950356

申请日：2013-07-25

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： GABI OFIR ,  BARUH HASON ,  SALOMON SERFATY

IPC: H04W4/08

CPC classification number: H04W4/08 ,  H04W36/0072 ,  H04W36/36 ,  H04W84/08 ,  H04W88/04

Abstract: A method and a system for operating a subscriber unit to seamlessly switch between a trunked mode operation (TMO) and a direct mode operation (DMO) in a communication system. The communication system includes one or more subscriber units communicating in trunked mode operation on a first communication channel via a base station and the subscriber units communicating in direct mode operation on a second communication channel via a direct mode gateway station. When the subscriber units communicate in the TMO and when the signal quality on the first communication channel is below the predetermined threshold, the subscriber units automatically switch to the direct mode operation. When the subscriber units communicate in DMO and when the signal quality on the second communication channel is below the predetermined threshold, the subscriber units automatically switch to the trunked mode operation.

Abstract translation: 一种用于操作用户单元以在通信系统中的集群模式操作（TMO）和直接模式操作（DMO）之间无缝切换的方法和系统。 通信系统包括经由基站在第一通信信道上以中继模式操作进行通信的一个或多个用户单元，以及经由直接模式网关站在第二通信信道上以直接模式操作进行通信的用户单元。 当用户单元在TMO中通信时，当第一通信信道上的信号质量低于预定阈值时，用户单元自动切换到直接模式操作。 当用户单元以DMO通信时，当第二通信信道上的信号质量低于预定阈值时，用户单元自动切换到集群模式操作。