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51. 发明申请

US20130288643A1 METHOD AND APPARATUS FOR RESTRICTING RADIO ACCESS TO A SYSTEM 有权
标题翻译：限制无线电接入系统的方法和装置
公开(公告)号：US20130288643A1
公开(公告)日：2013-10-31
申请号：US13459882
申请日：2012-04-30
申请人： SATYANARAYAN R. PANPALIYA , THOMAS B. BOHN , DIPENDRA M. CHOWDHARY , DAVID G. WIATROWSKI , ZHIJUN ZHU , STEPHEN LEE , GRACE ZHONG , RUI YANG
发明人： SATYANARAYAN R. PANPALIYA , THOMAS B. BOHN , DIPENDRA M. CHOWDHARY , DAVID G. WIATROWSKI , ZHIJUN ZHU , STEPHEN LEE , GRACE ZHONG , RUI YANG
IPC分类号： H04W12/06 , H04W24/00
CPC分类号： H04L1/0061 , H03M13/13 , H04N21/6375
摘要： A first subscriber unit (SU) operating in a two-way radio frequency (RF) communications system having at least one fixed terminal, one or more channels, and a plurality of subscriber units, generates a first burst of data for transmission to the at least one fixed terminal. The first SU calculates a cyclic redundancy check (CRC) or checksum value over (i) at least a first portion of the first burst of data and (ii) at least a portion of a first private data. The first SU transmits the first burst of data and the calculated CRC/checksum value, but not the first private data, to the at least one fixed terminal. The fixed terminal then calculates its own CRC/checksum over the received burst and its own copy of the first private data, and compares the result with the received CRC/checksum. The fixed terminal authenticates the received burst if the values match.
摘要翻译：在具有至少一个固定终端，一个或多个信道和多个用户单元的双向射频（RF）通信系统中操作的第一用户单元（SU）生成第一数据突发以传输到至少一个固定终端。第一SU在（i）第一数据突发的至少第一部分和（ii）至少一部分第一私有数据之后计算循环冗余校验（CRC）或校验和值。第一SU将第一个数据突发和计算的CRC /校验和值发送到至少一个固定终端，而不是第一私有数据。然后，固定终端在接收的脉冲串及其自己的第一私人数据的副本上计算其自己的CRC /校验和，并将结果与接收的CRC /校验和进行比较。如果值匹配，则固定终端对接收到的突发进行认证。

52. 发明授权

US08457104B2 Method for synchronizing direct mode time division multiple access (TDMA) transmissions 有权
公开(公告)号：US08457104B2
公开(公告)日：2013-06-04
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.

53. 发明授权

US08358968B2 Method for selecting a channel to be monitored by subscriber units that are idle in a communication system 有权
标题翻译：用于选择在通信系统中空闲的用户单元要监视的信道的方法
公开(公告)号：US08358968B2
公开(公告)日：2013-01-22
申请号：US12331167
申请日：2008-12-09
申请人： Satish R. Panpaliya , Dipendra M. Chowdhary , Tejal S. Patel , Badarinath Patibandla , David G. Wiatrowski
发明人： Satish R. Panpaliya , Dipendra M. Chowdhary , Tejal S. Patel , Badarinath Patibandla , David G. Wiatrowski
IPC分类号： H04M1/00 , H04B7/00 , H04B7/15 , H04W4/00
CPC分类号： H04W16/26 , H04B7/15542
摘要： In a two-way radio frequency (RF) communications system having at least one repeater, a plurality of channels, and a plurality of subscriber units, a repeater hosts a first channel that is currently serving as a rest channel. The channel that is currently serving as the rest channel is monitored by subscriber units that are idle in the system. When the repeater determines to select a second channel to serve as the rest channel, it determines whether there is at least one eligible channel to serve as the rest channel. If there is at least one eligible channel in the system, the repeater may select the second channel to serve as the rest channel from one of the eligible channels.
摘要翻译：在具有至少一个中继器，多个信道和多个订户单元的双向射频（RF）通信系统中，中继器承载当前用作休息信道的第一信道。当前用作休息信道的信道由在系统中空闲的用户单元监视。当中继器确定选择用作休息信道的第二信道时，它确定是否存在至少一个合格信道用作休息信道。如果系统中存在至少一个合格的频道，则中继器可以选择第二频道作为其中一个合格频道的休息频道。

54. 发明申请

US20120327927A1 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：US20120327927A1
公开(公告)日：2012-12-27
申请号：US13602752
申请日：2012-09-04
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： 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。

55. 发明授权

US08279991B2 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：US08279991B2
公开(公告)日：2012-10-02
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
CPC分类号： H04W56/0085 , H04L7/041
摘要： 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 by using sets of synchronization patterns associated with the desired timeslot that are at least mutually exclusive from synchronization patterns associated with the other timeslots on the same frequency.
摘要翻译：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，则通过使用与期望时隙相关联的同步模式集合，它们随时与时隙同步，立即与时隙同步，所述同步模式至少与与其它时隙相关联的同步模式互斥在同一频率

56. 发明授权

US08150438B2 Method for initiating a communication while participating in another communication 有权
标题翻译：在参与另一个通信时发起通信的方法
公开(公告)号：US08150438B2
公开(公告)日：2012-04-03
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。

57. 发明申请

US20110255527A1 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：US20110255527A1
公开(公告)日：2011-10-20
申请号：US12760787
申请日：2010-04-15
申请人： Dipendra M. Chowdhary , David G. Wiatrowski
发明人： Dipendra M. Chowdhary , David G. Wiatrowski
IPC分类号： H04B7/212
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。

58. 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。

59. 发明申请

US20100165839A1 ANTI-REPLAY METHOD FOR UNICAST AND MULTICAST IPSEC 审中-公开
标题翻译：用于UNICAST和MULTICAST IPSEC的反复制方法
公开(公告)号：US20100165839A1
公开(公告)日：2010-07-01
申请号：US12345160
申请日：2008-12-29
申请人： THOMAS J. SENESE , MICHAEL W. BRIGHT , DIPENDRA M. CHOWDHARY , CHRIS A. KRUEGEL , LARRY MURRILL , TIMOTHY G. WOODWARD
发明人： THOMAS J. SENESE , MICHAEL W. BRIGHT , DIPENDRA M. CHOWDHARY , CHRIS A. KRUEGEL , LARRY MURRILL , TIMOTHY G. WOODWARD
IPC分类号： H04L12/26
CPC分类号： H04W28/06 , H04L43/106 , H04L43/16 , H04L63/0272 , H04L63/164 , H04L67/2842 , H04L69/28
摘要： A method for managing a packet in a communication system between two or more endpoints, a sender and one or more recipients, comprises receiving a first packet comprising a source identifier that uniquely identifies a sender of the first packet and a current source time assigned to the first packet by the sender, determining a received time for the first packet, retrieving a cached source time assigned by the sender to a second packet that was received prior to receiving the first packet, and determining whether to discard or process the first packet based on the current source time, the received time, and the cached source time. The current source time, the received time, and the cached time, in addition to predetermined parameters such as a maximum age and an anti-replay window allows a recipient to determine whether to process or discard a packet.
摘要翻译：一种用于管理两个或多个端点之间的通信系统中的分组的方法，发送方和一个或多个接收者，包括：接收第一分组，其包括唯一地标识所述第一分组的发送者的源标识符和分配给所述第一分组的当前源时间由发送方确定第一分组，确定接收到的第一分组的时间，将发送方分配的高速缓存的源时间检索到在接收第一分组之前接收的第二分组，以及基于是否丢弃或处理第一分组当前源时间，接收时间和缓存的源时间。除了诸如最大年龄和反重播窗口的预定参数之外，当前源时间，接收时间和缓存时间允许接收者确定是处理还是丢弃分组。

60. 发明申请

US20100098254A1 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：US20100098254A1
公开(公告)日：2010-04-22
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： H04L9/00
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。

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