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21. 发明申请

US20100279726A1 METHOD FOR INITIATING A COMMUNICATION WHILE PARTICIPATING IN ANOTHER COMMUNICATION 有权
标题翻译：在其他通信中启动通信的方法
公开(公告)号：US20100279726A1
公开(公告)日：2010-11-04
申请号：US12433754
申请日：2009-04-30
申请人： Thomas B. Bohn , Dipendra M. Chowdhary , Satyanarayan R. Panpaliya , David G. Wiatrowski
发明人： Thomas B. Bohn , Dipendra M. Chowdhary , Satyanarayan R. Panpaliya , David G. Wiatrowski
IPC分类号： H04B7/00
CPC分类号： H04W84/08 , H04W4/10 , H04W76/10 , H04W76/45
摘要： Within a two way radio frequency communication system, a repeater transmits an identity of a rest channel when transmitting during an active communication call on a channel other than the rest channel. A subscriber unit communicating within the active communication, receives the identity of the rest channel, leaves the active communication; and initiates a new communication on the rest channel.
摘要翻译：在双向无线电频率通信系统中，当在除了休眠信道之外的信道上进行主动通信呼叫期间发送时，中继器发送休息信道的标识。在主动通信中通信的用户单元接收休息信道的身份，离开主动通信; 并在休息频道上启动新的通信。

22. 发明申请

US20100086092A1 Method of Efficiently Synchronizing to a Desired Timeslot in a Time Division Multiple Access Communication System 有权
标题翻译：在时分多址通信系统中有效同步到期望时隙的方法
公开(公告)号：US20100086092A1
公开(公告)日：2010-04-08
申请号：US12331189
申请日：2008-12-09
申请人： David G. Wiatrowski , Dipendra M. Chowdhary , Thomas B. Bohn
发明人： David G. Wiatrowski , Dipendra M. Chowdhary , Thomas B. Bohn
IPC分类号： H04L7/04 , H04W56/00
CPC分类号： H04W56/0085 , H04L7/041
摘要： The time required for the receiving device to synchronize to a desired timeslot is reduced. In operation, a transmitting device selects a synchronization pattern associated with the desired timeslot that is at least mutually exclusive from synchronization patterns associated with other timeslots on the same frequency in the system. Once selected, the transmitting device transmits a burst embedding the synchronization pattern that was selected, where appropriate. If the receiving device detects the synchronization pattern, it immediately synchronizes with the timeslot with confidence that it is synchronizing to the desired timeslot. Using synchronization pattern associated with the desired timeslot that is at least mutually exclusive from synchronization patterns associated with the other timeslots on the same frequency also improves spectral efficiency in direct-mode transmissions, thus allowing more than one subscriber unit to simultaneously transmit in direct mode on a frequency without interfering with other transmissions on the frequency.
摘要翻译：接收设备与期望时隙同步所需的时间减少。在操作中，发送设备选择与期望时隙相关联的同步模式，该期望时隙至少与系统中相同频率上与其他时隙相关联的同步模式相互排斥。一旦选择，发送装置在适当的情况下发送嵌入所选择的同步模式的突发。如果接收设备检测到同步模式，则它立即与时隙同步，使其与期望的时隙同步。使用与期望时隙相关联的同步模式，其至少与同一频率上的其他时隙相关联的同步模式互斥，也提高了直接模式传输中的频谱效率，从而允许多个用户单元以直接模式同时发送一个频率，而不会干扰频率上的其他传输。

23. 发明授权

US08139613B2 Method and device for channel inspection in a communication system 有权
标题翻译：通信系统中通道检测的方法和装置
公开(公告)号：US08139613B2
公开(公告)日：2012-03-20
申请号：US12253380
申请日：2008-10-17
申请人： John P. Belmonte , Dipendra M. Chowdhary , Yueh Ching Chung , Hun Weng Khoo , David G. Wiatrowski
发明人： John P. Belmonte , Dipendra M. Chowdhary , Yueh Ching Chung , Hun Weng Khoo , David G. Wiatrowski
IPC分类号： H04J3/06
CPC分类号： H04W48/16
摘要： To perform channel inspection, a wireless communication device conducts a full inspection on a first channel carrying a first signal that includes: determining a location of a first synchronization message; and determining whether the first signal is of interest. Upon determining that the first signal is not of interest, the first channel is marked, wherein the marking includes remembering the location of the first synchronization message. The device leaves the first channel and determines an expected location of a second synchronization message on the first channel based on the location of the first synchronization message. Upon returning to the first channel which carries a second signal, the communication device conduct a partial inspection that includes: detecting whether the second synchronization message is present at the expected location, wherein the presence of the second synchronization message indicates that the second signal is not of interest.
摘要翻译：为了执行信道检查，无线通信设备对承载第一信号的第一信道进行全面检查，该第一信道包括：确定第一同步消息的位置; 以及确定所述第一信号是否是感兴趣的。当确定第一信号不感兴趣时，标记第一信道，其中标记包括记住第一同步消息的位置。设备离开第一信道并且基于第一同步消息的位置在第一信道上确定第二同步消息的预期位置。在返回到携带第二信号的第一信道时，通信设备进行部分检查，其包括：检测第二同步消息是否存在于预期位置，其中存在第二同步消息指示第二信号不是出于兴趣。

24. 发明申请

US20120287921A1 METHOD FOR SYNCHRONIZING DIRECT MODE TIME DIVISION MULTIPLE ACCESS (TDMA) TRANSMISSIONS 有权
标题翻译：用于同步直接模式时分多址（TDMA）传输的方法
公开(公告)号：US20120287921A1
公开(公告)日：2012-11-15
申请号：US13557903
申请日：2012-07-25
申请人： Dipendra M. Chowdhary , David G. Wiatrowski
发明人： Dipendra M. Chowdhary , David G. Wiatrowski
IPC分类号： H04J3/06
CPC分类号： H04W56/0015 , H04J3/0641 , H04J3/0652
摘要： A method for synchronizing the direct mode TDMA transmission of a set of radios by following a selected radio as the leader includes: receiving, by a radio, a communication from an other radio; identifying, by the radio, a leader according to a leadership election rule using the received communication from the other radio and a current leader information; setting, by the radio, the identified leader as its leader; and synchronizing, by the radio, a time slot boundary with a time slot boundary defined by the leader.
摘要翻译：一种用于通过跟随选择的无线电作为前导者来同步一组无线电的直接模式TDMA传输的方法包括：通过无线电接收来自另一无线电的通信; 根据领导选举规则，通过无线电方式确定领导者，使用来自另一无线电台的接收到的通信和当前的领导信息; 以无线电方式确定所领导的领导人为领导人; 并且由无线电装置将时隙边界与由领导者定义的时隙边界同步。

25. 发明授权

US08078209B2 Method and device for controlling access to a channel in a conventional multi-site communication system 有权
标题翻译：用于控制对常规多站点通信系统中的信道的访问的方法和设备
公开(公告)号：US08078209B2
公开(公告)日：2011-12-13
申请号：US12253353
申请日：2008-10-17
申请人： Dipendra M. Chowdhary , John P. Belmonte , Sanjaykumar S. Karpoor , Hemant J. Patel , David G. Wiatrowski
发明人： Dipendra M. Chowdhary , John P. Belmonte , Sanjaykumar S. Karpoor , Hemant J. Patel , David G. Wiatrowski
IPC分类号： H04Q7/20
CPC分类号： H04W72/005
摘要： A repeater receives and repeats, on a multi-site channel, a sequence of control and media transmissions included in a session, wherein the session has a plurality of participants. While repeating these transmissions, the repeater further detects, from at least one of the transmissions, a start of the session and a type of the session. Based on the type of the session, the repeater determines whether to perform an arbitration during the session to control access to the multi-site channel, and restricts each performed arbitration to only transmissions received from the participants to the session. In addition, after repeating at least one of the control transmissions, the repeater sets a hang time having a duration that is determined based on a type of the transmission preceding the setting of the hang time.
摘要翻译：中继器在多站点信道上接收并重复包括在会话中的一系列控制和媒体传输，其中会话具有多个参与者。在重复这些传输的同时，中继器还从至少一个传输中检测会话的开始和会话的类型。基于会话的类型，中继器确定在会话期间是否执行仲裁以控制对多站点信道的访问，并且将每个执行的仲裁仅限于从参与者接收到会话的传输。此外，在重复控制传输中的至少一个之后，中继器设置具有基于在设置挂起时间之前的传输类型确定的持续时间的挂起时间。

26. 发明授权

US08045982B2 Methods for site selection in a multi-site communication system 有权
标题翻译：多站点通信系统中站点选择的方法
公开(公告)号：US08045982B2
公开(公告)日：2011-10-25
申请号：US12253478
申请日：2008-10-17
申请人： Hun Weng Khoo , John P. Belmonte , Dipendra M. Chowdhary , Yueh Ching Chung , David G. Wiatrowski
发明人： Hun Weng Khoo , John P. Belmonte , Dipendra M. Chowdhary , Yueh Ching Chung , David G. Wiatrowski
IPC分类号： H04W4/00
CPC分类号： H04W48/16 , H04W48/20
摘要： A device detects a first signal on a channel that is one of a plurality of channels arranged in a first order on a list, with each channel being associated with a different site in a multi-site communication system. Upon detecting the first signal, the device attempts to measure and record signal strength of a signal at each channel on the list based on the first order beginning with the detected first signal, and selects as a home site the site associated with the channel having the signal with the highest recorded signal strength. The device rearranges the channels on the list into a second order based on the recorded signal strengths with the home site channel at the top. If necessary, the radio attempts to awaken its repeaters one after another based on the second order until a repeater is found to transmit a signal.
摘要翻译：设备检测作为在列表中以一级排列的多个信道之一的信道上的第一信号，其中每个信道与多站点通信系统中的不同站点相关联。在检测到第一信号时，设备基于从检测到的第一信号开始的第一阶段尝试测量和记录信号在列表上的每个信道的信号强度，并且选择与具有该信道的信道相关联的站点作为归属站点具有最高记录信号强度的信号。基于记录的信号强度，设备将顶部的主站通道重新排列列表中的通道，使之成为第二个顺序。如果需要，无线电基于第二次尝试一个接一个唤醒其中继器，直到发现一个中继器发送一个信号。

27. 发明授权

US08462766B2 Methods and apparatus for diffusing channel timing among subscriber units in TDMA direct mode 有权
标题翻译： TDMA直接模式用户单元漫游信道定时的方法和装置
公开(公告)号：US08462766B2
公开(公告)日：2013-06-11
申请号：US13042342
申请日：2011-03-07
申请人： David G. Wiatrowski , John P. Belmonte , Dipendra M. Chowdhary , Yueh Ching Chung
发明人： David G. Wiatrowski , John P. Belmonte , Dipendra M. Chowdhary , Yueh Ching Chung
IPC分类号： H04J3/06
CPC分类号： H04W56/004 , H04B7/2643 , H04W92/18
摘要： A method for diffusing channel timing among a plurality of subscriber units operating in TDMA Direct Mode, wherein the method includes: receiving, from a second one of the subscriber units operating in the TDMA Direct Mode, a first message; determining first channel timing from the received message; determining whether the received first channel timing is correct, wherein the determining is based at least on comparing a generation of the first subscriber unit with a generation of the second subscriber unit; when the received first channel timing is correct, starting a random delay; upon expiration of the random delay, transmitting a first forced propagation message to propagate the first channel timing to at least a third one of the subscriber units operating in the TDMA Direct Mode and having a higher generation than the generations of the first and the second subscriber units.
摘要翻译：一种用于在TDMA直接模式下操作的多个用户单元之中扩散信道定时的方法，其中该方法包括：从以TDMA直接模式操作的第二用户单元接收第一消息; 从所接收的消息确定第一信道定时; 确定所接收的第一信道定时是否正确，其中所述确定至少基于将所述第一用户单元的生成与所述第二用户单元的生成进行比较; 当接收的第一信道定时正确时，开始随机延迟; 在随机延迟到期时，发送第一强制传播消息以将第一信道定时传播到以TDMA直接模式操作的用户单元中的至少第三个，并且具有比第一和第二用户的代单位。

28. 发明授权

US08422679B2 Method and device for sending encryption parameters 有权
标题翻译：用于发送加密参数的方法和设备
公开(公告)号：US08422679B2
公开(公告)日：2013-04-16
申请号：US12253411
申请日：2008-10-17
申请人： Dipendra M. Chowdhary , John P. Belmonte , David G. Wiatrowski
发明人： Dipendra M. Chowdhary , John P. Belmonte , David G. Wiatrowski
IPC分类号： H04L29/06
CPC分类号： H04K1/00 , H04L9/065 , H04L63/0428 , H04L63/06 , H04L2209/34 , H04L2209/80
摘要： A transmitting device encrypts DMR voice superframes using encryption parameters and sends the encryption parameters in at least one of the voice superframes by: identifying a selected number of bits from a plurality of vocoder frames the voice superframe; replacing each of the identified bits with a corresponding bit of a first encryption parameter; placing at least one encryption parameter in an embedded signaling field of the voice superframe; and transmitting the voice superframe with the encryption parameters to a receiving device. The receiving device extracts the encryption parameters, which can be a key identifier, an algorithm identifier, and an initialization vector for use in decrypting messages from the transmitting device.
摘要翻译：发送设备使用加密参数对DMR语音超帧进行加密，并且通过以下方式发送加密参数：至少一个语音超帧：从语音超帧的多个声码器帧中识别选定数量的比特; 用第一加密参数的对应位替换所识别的比特中的每一个; 在语音超帧的嵌入式信令字段中放置至少一个加密参数; 以及将具有加密参数的语音超帧传送到接收设备。接收装置提取可以是密钥标识符的加密参数，算法标识符和用于解密来自发送装置的消息的初始化向量。

29. 发明授权

US07983210B2 Method and system of scanning a TDMA channel 有权
标题翻译：扫描TDMA信道的方法和系统
公开(公告)号：US07983210B2
公开(公告)日：2011-07-19
申请号：US11144991
申请日：2005-06-03
申请人： Dipendra M. Chowdhary , David G. Wiatrowski
发明人： Dipendra M. Chowdhary , David G. Wiatrowski
IPC分类号： H04B7/212 , H04B7/00 , H04J3/06 , H04W4/00 , H04W72/00
CPC分类号： H04W24/00
摘要： A method for scanning a TDMA channel by a mobile station in a wireless communications landscape is disclosed. A mobile station detects RF energy on a TDMA channel to detect activity in the detected RF energy. The mobile station maintains knowledge of previous activity on the channel. If activity is present on the channel, the mobile station performs inspection of the activity to determine whether the activity is activity of interest, wherein the activity is activity of interest based on a comparison of the activity with the previous activity. The mobile station aborts the inspection of the activity, if activity is not present on the channel and the mobile station aborts the inspection of the activity, if the determined activity is not activity of interest.
摘要翻译：公开了一种在无线通信环境中由移动台扫描TDMA信道的方法。移动站检测TDMA信道上的RF能量以检测检测到的RF能量中的活动。移动台维持对频道上的以前活动的知识。如果频道上存在活动，则移动台执行该活动的检查以确定活动是否是感兴趣的活动，其中活动是基于活动与先前活动的比较而感兴趣的活动。如果所确定的活动不是感兴趣的活动，则移动台中止活动的检查，如果活动不存在于该频道上，则移动台中止活动的检查。

30. 发明申请

US20120327928A1 METHOD AND APPARATUS FOR TRACKING A CHANNEL TIMING MESSAGE AND SUPPORTING CHANNEL SCANNING IN A DIGITAL MOBILE RADIO SYSTEM 有权
标题翻译：跟踪数字移动无线电系统中的信道定时消息和支持信道扫描的方法和装置
公开(公告)号：US20120327928A1
公开(公告)日：2012-12-27
申请号：US13166151
申请日：2011-06-22
申请人： David G. Wiatrowski , John P. Belmonte , Dipendra M. Chowdhary , Yueh Ching Chung
发明人： David G. Wiatrowski , John P. Belmonte , Dipendra M. Chowdhary , Yueh Ching Chung
IPC分类号： H04W56/00
CPC分类号： H04W56/0015
摘要： A method and apparatus for enabling a radio to track channel timing and support channel scanning A non-leading radio operating on a communications channel, determines a diffusion period during which channel timing is to be propagated from a leading radio to non-leading radios operating on the communications channel. The non-leading radio implements a first scanning pattern during the diffusion period to scan a CT designated channel for a control timing message with a timing signal sent from the leading radio. The first scanning pattern involves scanning the CT designated channel during every other scan interval and scanning non-priority channels and priority channels during scan intervals not used on the CT designated channel.
摘要翻译：一种用于使得无线电能够跟踪信道定时并支持信道扫描的方法和装置在通信信道上操作的非前置无线电确定扩频周期，在该扩散周期期间，将信道定时从主导无线电传播到非导频无线电，通信通道。非前置无线电在扩散周期期间实施第一扫描模式，以从具有从前置无线电发送的定时信号扫描CT指定信道用于控制定时消息。第一扫描模式涉及在每隔一个扫描间隔期间扫描CT指定信道，并且在CT指定信道上未使用的扫描间隔期间扫描非优先级信道和优先信道。

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