公开(公告)号：US20150305007A1

公开(公告)日：2015-10-22

申请号：US14367292

申请日：2011-12-30

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： Pawel Jurzak ,  Jim Bellizio ,  Waldemar K. Dworakowski ,  Piotr Kuzio

IPC: H04W72/04 ,  H04L12/709 ,  H04W76/02

CPC classification number: H04W72/0406 ,  H04L45/245 ,  H04W4/10 ,  H04W72/10 ,  H04W76/11 ,  H04W84/08 ,  H04W88/02 ,  H04W88/08 ,  H04W88/12

Abstract: A wireless communication system (200) for providing two-way radio communication includes a base station (340) comprising a receiver (352) and a transmitter (354). The receiver receives transmissions from a first mobile communication unit (210) on a first frequency, assigned for reception. The transmitter transmits on a second frequency, assigned for transmission. The base station (340) is operable to receive a preemption call from a second mobile communication unit (220) on the first frequency, when the first frequency is not in use for reception and the second frequency is in use for transmission. Otherwise the base station (340) receives a preemption call on the second frequency. The base station (340) may comprise a second receiver (344), operable to receive the preemption call on the second frequency during a planned interruption to transmissions from the transmitter (354). Alternatively, the receiver (352) may receive the preemption call on the second frequency, during the transmission interruption.

Abstract translation: 一种用于提供双向无线电通信的无线通信系统（200）包括包括接收机（352）和发射机（354）的基站（340）。 接收机接收来自第一频率的第一移动通信单元（210）的传输，被分配用于接收。 发射机在被分配用于传输的第二频率上发射。 当第一频率不用于接收并且第二频率用于传输时，基站（340）可操作以从第一频率上的第二移动通信单元（220）接收抢占呼叫。 否则，基站（340）在第二频率上接收抢占呼叫。 基站（340）可以包括第二接收机（344），可操作以在计划中断期间在来自发射机（354）的传输中接收在第二频率上的抢占呼叫。 或者，接收机（352）可以在传输中断期间在第二频率上接收抢占呼叫。

公开(公告)号：US09961611B2

公开(公告)日：2018-05-01

申请号：US15122667

申请日：2014-04-29

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Pawel Jurzak ,  Waldemar K. Dworakowski ,  Tomasz Mariusz Warzecha

IPC: H04W16/26 ,  H04W40/22 ,  H04W76/00 ,  H04W76/02 ,  H04B17/318 ,  H04L5/00 ,  H04W36/30 ,  H04W36/32 ,  H04W48/00 ,  H04W68/00 ,  H04W88/06 ,  H04W92/18 ,  H04W88/04 ,  H04W88/16

CPC classification number: H04W40/22 ,  H04B17/318 ,  H04L5/006 ,  H04W16/26 ,  H04W36/30 ,  H04W36/32 ,  H04W48/17 ,  H04W68/005 ,  H04W76/14 ,  H04W76/15 ,  H04W76/45 ,  H04W88/04 ,  H04W88/06 ,  H04W88/16 ,  H04W92/18

Abstract: A method and apparatus for selecting a gateway to extend the communication range of a wireless communication device in a radio communication system are provided. A first communication device monitors transmissions from a second wireless communication device. The first device requests that the second device act as a gateway, receives an acknowledgement, and then can initiate a connection via the second device to the radio communication system. The connection uses a first receiver and a transmitter of the first device. The first device uses a second receiver to monitor the second device, and other wireless communication devices of the system, thereby dynamically maintaining a list of at least a primary gateway and a secondary gateway that are available for relaying a connection from the first device.