公开(公告)号：US09391592B2

公开(公告)日：2016-07-12

申请号：US14562055

申请日：2014-12-05

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Arthur Christopher Leyh ,  Thomas B Bohn ,  Gregory J Buchwald ,  David P Gurney

IPC: H04B7/00 ,  H03J7/02 ,  H04B7/185

CPC classification number: H03J7/02 ,  H04B7/18506

Abstract: Disclosed herein are methods and systems for dynamically adjusting frequency offsets for mitigating interference. One embodiment takes the form of a process carried out by a mobile radio configured to use an adjustable transmit frequency. The mobile radio estimates an expected base-station-receive power level with respect to transmissions from to a base station. The mobile radio adjusts the transmit frequency to be a center frequency of a radio channel plus a default frequency offset responsive to the estimated expected base-station-receive power level being less than a first threshold. The mobile radio adjusts the transmit frequency to be the center frequency plus a modified frequency offset responsive to the estimated expected base-station-receive power level being greater than a second threshold. The modified frequency offset is greater in magnitude than the default frequency offset. The mobile radio transmits an uplink signal to the base station over the adjusted transmit frequency.

Abstract translation: 这里公开了用于动态调整频率偏移以减轻干扰的方法和系统。 一个实施例采用被配置为使用可调发射频率的移动无线电设备执行的处理的形式。 移动无线电装置估计相对于从基站的传输的预期基站接收功率电平。 响应于估计的预期基站接收功率电平小于第一阈值，移动无线电将发射频率调整为无线电信道的中心频率加上默认频率偏移。 响应于估计的预期基站接收功率电平大于第二阈值，移动无线电将发送频率调整为中心频率加上修改的频率偏移。 修改的频率偏移幅度大于默认频率偏移量。 移动无线电通过经调整的发射频率向基站发送上行链路信号。

公开(公告)号：US09232522B2

公开(公告)日：2016-01-05

申请号：US13946464

申请日：2013-07-19

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Hun Weng Khoo ,  Thomas B Bohn ,  Yueh Ching Chung ,  David G Wiatrowski

IPC: H04J3/00 ,  H04W72/04 ,  H04L5/14 ,  H04B7/26 ,  H04W84/08

CPC classification number: H04W72/0446 ,  H04B7/2656 ,  H04L5/14 ,  H04W84/08

Abstract: A method for enabling full duplex direct mode calls between radios in an N:1 slotting ratio TDMA radio system includes detecting a request for a full duplex direct mode call at a first radio, transmitting in a particular slot of a first recurring time slot of N recurring time slots on a first single frequency one of a call request and a call header identifying the call as a full duplex call. Subsequently transmitting, by the first radio, during a plurality of subsequent first recurring time slots, outbound voice and/or data transmissions. And receiving, during a plurality of second recurring time slots of the N recurring time slots, each second recurring timeslot positioned immediately adjacent a respective first recurring time slot in an interleaved manner, inbound voice and/or data transmissions from the second radio and playing back the inbound voice and/or data transmission at the first radio.

Abstract translation: 一种用于在N：1时隙率TDMA无线电系统中的无线电之间实现全双工直接模式呼叫的方法包括在第一无线电中检测对全双工直接模式呼叫的请求，在N个第一重复时隙的特定时隙中进行发送 呼叫请求中的一个频率上的经常性时隙和将该呼叫标识为全双工呼叫的呼叫头。 随后由第一无线电装置在多个随后的第一循环时隙中发送出站语音和/或数据传输。 并且在N次循环时隙的多个第二循环时隙期间，以交织的方式接收与相应的第一循环时隙紧邻的每个第二循环时隙，从第二无线电接收入站语音和/或数据传输 第一个收音机的入站语音和/或数据传输。

公开(公告)号：US09654257B2

公开(公告)日：2017-05-16

申请号：US14605143

申请日：2015-01-26

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Thomas B Bohn

IPC: H04L1/16 ,  H04W56/00 ,  H04W72/04 ,  H04W72/12

CPC classification number: H04L1/1635 ,  H04W56/0015 ,  H04W72/0446 ,  H04W72/1289

Abstract: A method and apparatus for time-efficient confirmed group data acknowledgement includes a radio subscriber unit (SU) configured to (i) generate a receive status message comprising a first synchronization pattern indicating successful receipt of a set of data blocks when the SU has successfully received the set of data blocks from a base radio, (ii) generate a receive status message comprising a second synchronization pattern indicating unsuccessful receipt of a set of data blocks when the SU has not successfully received the set of data blocks from the base radio, and (iii) transmit the generated receive status message from the SU to the base radio during an uplink transmit time interval assigned by the base radio.

公开(公告)号：US09271257B2

公开(公告)日：2016-02-23

申请号：US14106622

申请日：2013-12-13

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Yueh Ching Chung ,  Thomas B Bohn ,  Dipendra M Chowdhary ,  Hun Weng Khoo ,  Satyanarayan R Panpaliya ,  Teik Choon Teh

IPC: H04W4/08 ,  H04W4/10 ,  H04W64/00 ,  H04W76/00 ,  H04W84/08

CPC classification number: H04W64/00 ,  H04W4/08 ,  H04W76/45 ,  H04W84/08

Abstract: A radio affiliates, via a first channel, with at least one talk group the radio is interested in receiving calls from, sends a request to transmit location information on a separate revert channel, and receives a first grant time period to transmit location information on a particular revert channel. The radio moves at substantially the first grant time period, away from the first channel to the revert channel to transmit location information or request a second grant time period on the revert channel, receives an announcement on the revert channel during the first grant time period that a call of interest associated with the at least one talk group started while the radio was on the revert channel, determines an assigned traffic channel for the call of interest, and switches from the revert channel to the assigned traffic channel in order to receive the call of interest.

Abstract translation: 无线电附属机构经由第一信道与无线电有兴趣接收呼叫的至少一个通话组发送在单独的还原信道上发送位置信息的请求，并且接收第一授权时间段以在 特定还原通道。 无线电基本上在第一授权时间段移动，远离第一信道到恢复信道以发送位置信息，或在还原信道上请求第二授权时间段，在第一授权时间周期期间在恢复信道上接收公告， 当无线电在恢复信道上时，与所述至少一个通话组相关联的兴趣呼叫确定用于所述感兴趣的呼叫的所分配的业务信道，并且从恢复信道切换到所分配的业务信道，以便接收呼叫 出于兴趣。

公开(公告)号：US09231693B2

公开(公告)日：2016-01-05

申请号：US13946145

申请日：2013-07-19

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Hun Weng Khoo ,  Thomas B Bohn ,  Yueh Ching Chung ,  David G Wiatrowski

IPC: H04J3/08 ,  H04B7/212 ,  H04L5/14 ,  H04W72/12 ,  H04B7/155 ,  H04W84/04

CPC classification number: H04B7/2123 ,  H04B7/15542 ,  H04L5/14 ,  H04L5/1469 ,  H04W72/1263 ,  H04W84/047

Abstract: A method for enabling full duplex individual calls in repeater mode between two subscriber units (SUs) in a N:1 slotting ratio time division multiple access (TDMA) radio system includes receiving a request for a full duplex individual call from a first SU identifying a second SU as a target of the call. Determining to grant the request and subsequently assigning a first time slot of the N time slots on a first single frequency for one of inbound and outbound transmissions for the call between an assigned second repeater and the first SU and a second time slot on the first single frequency for the other of inbound and outbound transmissions for the call between the assigned second repeater and the first SU. Further, a grant message is transmitted to the first SU indicating the assigned first single frequency and assigned first and second time slots.

Abstract translation: 一种用于在N：1时隙率时分多址（TDMA）无线电系统中的两个用户单元（SU）之间以中继器模式启用全双工个性呼叫的方法包括从第一SU识别全双工个人呼叫的请求， 第二个SU作为呼叫的目标。 确定授权所述请求并且随后在所分配的第二中继器和所述第一SU之间的所述呼叫的入站和出站传输中的一个的第一单个频率上分配所述N个时隙的第一时隙，并且在所述第一单个频率上为所述第一单个频率分配所述N个时隙的第一时隙 用于分配的第二中继器和第一SU之间的呼叫的入站和出站传输中的另一个的频率。 此外，授权消息被发送到指示所分配的第一单个频率并分配的第一和第二时隙的第一SU。

公开(公告)号：US09277428B2

公开(公告)日：2016-03-01

申请号：US14264821

申请日：2014-04-29

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Dipendra M Chowdhary ,  John P Belmonte ,  Thomas B Bohn ,  Satyanarayan R Panpaliya ,  Badarinath Patibandla

IPC: H04W28/02 ,  H04W24/04 ,  H04W74/08

CPC classification number: H04W24/04 ,  H04W28/0236 ,  H04W28/0242 ,  H04W48/02 ,  H04W74/0833

Abstract: A radio controller monitors a radio channel for a first period of time and determines a first indication of signals received without detecting synchronization or with detecting synchronization but failing error correction during that time. Responsive to determining that the first indication is above a predetermined threshold indicative of an interference condition, causing an instruction to be broadcast identifying a subset of subscriber devices allowed transmitting random access requests on the radio channel. The radio controller monitors the radio channel for a second period of time and determines a second indication during that time. If the second indication is an improvement over the first indication, the radio controller determines that the interference condition is caused by the mass random access event.

Abstract translation: 无线电控制器在第一时间段内监测无线电信道，并且确定接收到的信号的第一指示而不检测同步或者检测到同步，但在该时间期间失败的纠错。 响应于确定第一指示高于指示干扰条件的预定阈值，引起广播指令，标识允许在无线电信道上发送随机接入请求的订户设备的子集。 无线电控制器在第二段时间内监视无线电信道，并在该时间确定第二指示。 如果第二指示是对第一指示的改进，则无线电控制器确定干扰条件是由大规模随机接入事件引起的。

公开(公告)号：US09271253B2

公开(公告)日：2016-02-23

申请号：US14090341

申请日：2013-11-26

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： Alexander D Roussev ,  Thomas B Bohn

IPC: H04W4/00 ,  H04W60/00 ,  H04W4/10 ,  H04W64/00

CPC classification number: H04W60/04 ,  H04W4/10 ,  H04W28/0289 ,  H04W60/005 ,  H04W64/00

Abstract: A method and apparatus are described for managing a mass registration scenario in a two-way radio system. A site controller in a trunked radio system detects a mass registration condition in which registration requests by subscriber units are likely to collide on an inbound control channel. During the mass registration condition, the site controller initiates a restriction period by instructing subscriber units that are members of particular talkgroups to temporarily cease registration requests. Those talkgroup members are permitted to resume their registration requests when a predetermined delay time has passed since the members were instructed to cease registration, or when a particular silence time has passed without registration activity over the control channel.

公开(公告)号：US09178987B2

公开(公告)日：2015-11-03

申请号：US14014758

申请日：2013-08-30

Applicant: MOTOROLA SOLUTIONS, INC

Inventor： David G Wiatrowski ,  Thomas B Bohn ,  Dipendra M Chowdhary

IPC: H04L12/16 ,  H04M3/20 ,  H04L12/851 ,  H04W76/04 ,  H04W76/06

CPC classification number: H04M3/20 ,  H04L47/245 ,  H04L47/32 ,  H04W4/06 ,  H04W76/28 ,  H04W76/36

Abstract: A system and method for interrupting a transmitting device during a call. In the system, calls are transmitted from a first device on a communication channel as a series of channel frames. At predetermined times during the transmission, the transmitting device is configured to drop channel frames, resulting in open channel frame periods where the transmitting device is not transmitting on the communication channel. During these open channel frame periods, the transmitting device is also configured to switch to a receiving mode. Other devices in the system are capable of switching into a transmitting mode during the open channel frame periods and, when applicable, sending an interrupt request on the communication channel to the transmitting device in order to request access to the channel.

Abstract translation: 一种用于在呼叫期间中断发送设备的系统和方法。 在系统中，作为一系列信道帧，从通信信道上的第一设备发送呼叫。 在发送期间的预定时间，发送设备被配置为丢弃信道帧，导致发送设备在通信信道上不发送的开放信道帧周期。 在这些开放频道帧周期期间，发送装置还被配置为切换到接收模式。 系统中的其他设备能够在开放的信道帧周期期间切换成发送模式，并且在适用的情况下，在通信信道上向发送设备发送中断请求，以便请求接入信道。