公开(公告)号：US5781540A

公开(公告)日：1998-07-14

申请号：US497582

申请日：1995-06-30

申请人： James Eryx Malcolm ,  Daniel Fraley ,  Adrian Morris ,  David Roos ,  Kumar Swaminathan ,  Seok Ho Kim ,  Robert Carroll Marquart

发明人： James Eryx Malcolm ,  Daniel Fraley ,  Adrian Morris ,  David Roos ,  Kumar Swaminathan ,  Seok Ho Kim ,  Robert Carroll Marquart

IPC分类号： H04B7/185 ,  H04J3/06 ,  H04L7/04 ,  H04L7/10 ,  H04B7/212

CPC分类号： H04J3/0605 ,  H04B7/18532 ,  H04L7/046 ,  H04L7/10

摘要： The present invention relates to a device and a method for communicating in a mobile communication system. The method provides a carrier signal having a plurality of frames. Each frame has a plurality of time slots, and each time slot comprises a plurality of transmission bits. A group of time slots are assigned to a communication channel. A traffic burst signal having a plurality of traffic symbols is transmitted over the communication channel by transmitting a first preamble over one of the assigned time slots, and transmitting a second preamble and at least one of the traffic symbols over at least one of the other assigned time slots. The second preamble occupies fewer transmission bits than the first preamble. The apparatus for transmitting a telephony signal over an RF channel includes a modem receiving a digitized PCM telephony signal and producing a traffic burst signal, and a transmitting unit in communication with the modem for transmitting a FDMA/TDMA signal carrying a plurality of traffic burst signals. At least one of the traffic burst signals carries a limited preamble message including a header field and a unique word field and at least one digitized voice message associated with a telephone call. Another traffic burst signal carries at least one signal acquisition message including a unique word field.

摘要翻译： 本发明涉及用于在移动通信系统中进行通信的装置和方法。 该方法提供具有多个帧的载波信号。 每个帧具有多个时隙，并且每个时隙包括多个传输比特。 一组时隙被分配给通信信道。 通过在所分配的时隙中的一个发送第一前同步码，通过通信信道发送具有多个业务符号的业务突发信号，并且通过至少一个其他分配的业务符号发送第二前导码和至少一个业务符号 时隙。 第二前导码占用比第一前同步码少的传输比特。 用于通过RF信道发送电话信号的装置包括调制解调器，接收数字化的PCM电话信号并产生业务脉冲串信号，以及与调制解调器通信的发送单元，用于发送携带多个话务脉冲串信号的FDMA / TDMA信号 。 业务突发信号中的至少一个携带有限的前导消息，其包括报头字段和唯一字字段以及与电话呼叫相关联的至少一个数字化语音消息。 另一业务脉冲串信号携带至少一个信号获取消息，其包括唯一的字字段。

公开(公告)号：US5974092A

公开(公告)日：1999-10-26

申请号：US507176

申请日：1995-07-26

申请人： David Roos ,  Seok Ho Kim ,  Enrique Laborde ,  Neeraj Tewari ,  Adrian Morris

发明人： David Roos ,  Seok Ho Kim ,  Enrique Laborde ,  Neeraj Tewari ,  Adrian Morris

IPC分类号： H04B7/185 ,  H04W68/02 ,  H04L27/10

CPC分类号： H04B7/18534 ,  H04W68/02

摘要： A method and system for alerting a mobile terminal in a high-attenuation propagation environment within a mobile satellite communication network are disclosed herein. The method comprises receiving an incoming call directed to the mobile terminal, generating a paging signal in response to the incoming call, determining whether the mobile terminal has failed to receive the paging signal, and generating an alerting signal in response to the determination that the mobile terminal has failed to receive the paging signal. The system comprises a plurality of mobile terminals capable of receiving voice calls via a satellite; a satellite adapted to communicate with each of the mobile terminals, the satellite transmitting a spot beam to the mobile terminals; at least one gateway in communication with the satellite, the gateway having a first signal generator for producing a paging signal in response to an incoming call, logic for determining whether the mobile terminal has detected the paging signal, and a second signal generator for producing a high-power alerting signal in response to the logic; a first detector in the mobile terminal for detecting the paging signal; and a second detector in the mobile terminal for detecting the alerting signal.

摘要翻译： 这里公开了用于在移动卫星通信网络内的高衰减传播环境中提醒移动终端的方法和系统。 所述方法包括：接收指向所述移动终端的呼入呼叫，响应于所述呼入生成寻呼信号，确定所述移动终端是否已经不能接收到所述寻呼信号，以及响应于所述移动终端的确定而产生警报信号 终端未能接收到寻呼信号。 该系统包括能够通过卫星接收语音呼叫的多个移动终端; 适于与每个移动终端通信的卫星，卫星向移动终端发送点波束; 与所述卫星通信的至少一个网关，所述网关具有用于响应于来话呼叫产生寻呼信号的第一信号发生器，用于确定所述移动终端是否已经检测到所述寻呼信号的逻辑，以及用于产生所述寻呼信号的第二信号发生器 大功率报警信号响应逻辑; 移动终端中的第一检测器，用于检测寻呼信号; 以及移动终端中用于检测该告警信号的第二检测器。

公开(公告)号：US06278876B1

公开(公告)日：2001-08-21

申请号：US09115098

申请日：1998-07-13

申请人： Chandra Joshi ,  Anthony Noerpel ,  Neeraj Tewari ,  Gerard Stelzer ,  David Roos ,  Chi-Jiun Su

发明人： Chandra Joshi ,  Anthony Noerpel ,  Neeraj Tewari ,  Gerard Stelzer ,  David Roos ,  Chi-Jiun Su

IPC分类号： H04Q720

CPC分类号： H04B7/2125 ,  H04B7/18517 ,  H04B7/18539 ,  H04B7/18543 ,  H04B7/18558 ,  H04B7/18567 ,  H04B7/18571 ,  H04B7/1858 ,  H04B7/18582 ,  H04B7/19 ,  H04B7/2041 ,  H04W28/14 ,  H04W52/0203 ,  H04W52/0216 ,  H04W72/0413 ,  H04W72/042 ,  H04W74/00 ,  H04W76/10 ,  H04W76/25 ,  H04W80/00 ,  H04W84/06 ,  Y02D70/1222 ,  Y02D70/164 ,  Y02D70/20 ,  Y02D70/446

摘要： A system and method for implementing single hop space segment terminal to terminal connections. The system includes a satellite-based radio frequency (RF) communication link for conveying multiple communication channels over the space segment via one or more spot beams. A terrestrial supervisory transceiver such as a gateway station is provided in communication with the satellite-based communication link. Mobile hand-held terminals (HHTs), herein first and second access terminals, may be located within one or more of the spot beams to communicate with one another via a single hop connection through a satellite of the system. A switch is provided for communication switching with the satellite of the system for the multiple communication channels to couple the first access terminal and the second access terminal over the space segment via one or more of the spot beams. The terrestrial supervisory transceiver or gateway is provided in communication with the satellite switch via the satellite-based communication link for implementing the single hop space segment terminal to terminal connection.

摘要翻译： 一种实现单跳空间段终端到终端连接的系统和方法。 该系统包括用于经由一个或多个点波束在空间段上传送多个通信信道的基于卫星的射频（RF）通信链路。 提供与卫星通信链路通信的诸如网关站的地面监控收发器。 本文中的第一和第二接入终端中的移动手持终端（HHT）可以位于一个或多个点波束内，以经由通过系统的卫星的单跳连接来彼此通信。 提供了用于与用于多个通信信道的系统的卫星进行通信切换的开关，以通过一个或多个点波束将空间段上的第一接入终端和第二接入终端耦合。 提供地面监控收发信机或网关，通过基于卫星的通信链路与卫星交换机通信，实现单跳空间段终端到终端连接。

公开(公告)号：US08793745B2

公开(公告)日：2014-07-29

申请号：US13438570

申请日：2012-04-03

申请人： Liming Qin ,  Marwan Adas ,  Prachi Raikar ,  David Roos ,  Yezdi Antia ,  Neal Becker

发明人： Liming Qin ,  Marwan Adas ,  Prachi Raikar ,  David Roos ,  Yezdi Antia ,  Neal Becker

IPC分类号： H04N7/20 ,  H04N21/236 ,  H04N21/238

CPC分类号： H04N21/6143 ,  H03M13/1165 ,  H04N7/20 ,  H04N21/236 ,  H04N21/238 ,  H04N21/2381 ,  H04N21/2389

摘要： A receiver is used with third code blocks based on first code blocks, second code blocks, and a planning code block. The first code blocks are associated with a first sequence number and modulated with a first modulation scheme. The second code blocks are associated with a second sequence number and modulated with a second modulation scheme. The planning code block associates the third code blocks with the first code blocks and the second code blocks. The receiver includes a de-multiplexing portion, which includes a code block selector and a look up table, that outputs a de-multiplexed signal based on the third code blocks. The code block selector selects a code block from the third code blocks to output as the de-multiplexed signal based on entries in the look up table. The receiver also includes a recovery portion that outputs received code blocks based on the de-multiplexed signal.

摘要翻译： 基于第一代码块，第二代码块和规划代码块的第三代码块使用接收器。 第一码块与第一序列号相关联，并用第一调制方案进行调制。 第二码块与第二序列号相关联，并用第二调制方案进行调制。 规划代码块将第三代码块与第一代码块和第二代码块相关联。 接收机包括解复用部分，其包括代码块选择器和查找表，其基于第三代码块输出解复用信号。 代码块选择器从第三代码块中选择代码块，作为基于查找表中的条目的解复用信号输出。 接收机还包括基于解复用信号输出接收码块的恢复部分。

公开(公告)号：USD558359S1

公开(公告)日：2007-12-25

申请号：US29248912

申请日：2006-09-08

申请人： Tony Mathias ,  David Roos ,  David Schneider

设计人： Tony Mathias ,  David Roos ,  David Schneider

公开(公告)号：US06721538B1

公开(公告)日：2004-04-13

申请号：US09678681

申请日：2000-10-05

申请人： John Sullivan ,  David Roos ,  Michael Parr

发明人： John Sullivan ,  David Roos ,  Michael Parr

IPC分类号： H04B719

CPC分类号： H04B7/18517

摘要： An approach for minimizing variation in transmit power of synchronized signals that are destined to a satellite is disclosed. A gateway station system for communicating with a communication satellite includes a multiple signal sources which generate the synchronized signals. The gateway station system utilizes a control logic that is coupled to the signal sources. The control logic operates to offset selectively transmission times of a portion of the synchronized signals according to a predetermined distribution and an offset period. The predetermined distribution specifies about half the number of the synchronized signals are to be offset. The offset period is half a symbol period. The terminals within the satellite communication system has a receiver that receives the synchronized signal from the communication satellite. Each of the terminals also includes an offset-determination logic that is coupled to the receiver and determines whether the synchronized signals are offset based upon a received assignment message. The assignment message has a control flag field that indicates whether the received signal is offset.

摘要翻译： 公开了一种用于最小化发往卫星的同步信号的发射功率变化的方法。 用于与通信卫星通信的网关站系统包括产生同步信号的多个信号源。 网关站系统利用耦合到信号源的控制逻辑。 控制逻辑操作以根据预定分布和偏移周期选择性地偏移同步信号的一部分的传输时间。 预定分布规定了大约一半的同步信号的数量将被偏移。 偏移周期是符号周期的一半。 卫星通信系统内的终端具有接收来自通信卫星的同步信号的接收机。 每个终端还包括耦合到接收机的偏移确定逻辑，并且基于接收到的分配消息来确定同步信号是否被偏移。 分配消息具有指示接收到的信号是否被偏移的控制标志字段。

公开(公告)号：US06553225B1

公开(公告)日：2003-04-22

申请号：US09417592

申请日：1999-10-14

申请人： Wei Zhao ,  David Roos

发明人： Wei Zhao ,  David Roos

IPC分类号： H04Q720

CPC分类号： H04B7/2041 ,  H04B7/1851

摘要： An apparatus and method, for use in a satellite-based communications network, for positioning offset zones in a spot beam coverage area to maximize call duration. The apparatus and method employs a spot beam segregator and an offset zone arranger. The spot beam segregator segregates a coverage area of a spot beam generated by a satellite in the network into at least one offset zone based on respective propagation time periods required for signals to travel between the satellite and respective different locations in the coverage area. The offset zone arranger arranges each offset zone such that each respective center of each one offset zone overlaps a respective geographical location in the coverage area, with each respective geographic location having a respective access terminal density greater than any other geographical region within its respective offset zone. The burst offset to be assigned to each single-offset zone is then determined based on the propagation delay at each respective highest access terminal density region in the respective zones. Therefore, within each offset zone, the amount of access terminals whose guard time between bursts received and transmitted is optimized, and call duration is effectively maximized.

摘要翻译： 一种在基于卫星的通信网络中使用的装置和方法，用于在点波束覆盖区域中定位偏移区域以最大化通话持续时间。 该装置和方法采用点光束分离器和偏移区调节器。 点波束分离器基于在卫星与覆盖区域中的各个不同位置之间传播的信号所需的相应传播时间周期，将由网络中的卫星产生的点波束的覆盖区域分离成至少一个偏移区。 偏移区域布置器布置每个偏移区域，使得每个偏移区域的每个相应中心与覆盖区域中的相应地理位置重叠，每个相应的地理位置具有大于其各自偏移区域内的任何其它地理区域的相应的访问终端密度 。 然后基于各个区域中每个相应的最高接入终端密度区域处的传播延迟确定要分配给每个单偏移区域的突发偏移。 因此，在每个偏移区域内，优化接收和发送突发之间的保护时间的接入终端的数量，并且有效地使呼叫持续时间最大化。

公开(公告)号：US20110258669A1

公开(公告)日：2011-10-20

申请号：US13086702

申请日：2011-04-14

申请人： Yezdi Antia ,  David Roos ,  Neal Becker

发明人： Yezdi Antia ,  David Roos ,  Neal Becker

IPC分类号： H04N7/20

CPC分类号： H04N7/20

摘要： A transmitter is provided for use with a first input signal and a second input signal. The transmitter includes a first modulating portion, a second modulating portion and a multiplexing portion. The first modulating portion can output a first plurality of code blocks based on the first input signal, wherein each of the first plurality of code blocks has a first sequence number associated therewith and is modulated with a first modulation scheme. The second modulating portion can output a second plurality of code blocks based on the second input signal, wherein each of the second plurality of code blocks has a second sequence number associated therewith and is modulated with a second modulation scheme, and wherein the second modulation scheme is different than the first modulation scheme. The multiplexing portion can a third plurality of code blocks based on the first plurality of code blocks, the second plurality of code blocks and planning code block. The planning code block associates each of the third plurality of code blocks with a respective one of the first plurality of code blocks and the second plurality of code blocks.

摘要翻译： 提供用于与第一输入信号和第二输入信号一起使用的发射器。 发射机包括第一调制部分，第二调制部分和复用部分。 第一调制部分可以基于第一输入信号输出第一多个码块，其中第一多个码块中的每一个具有与之相关联的第一序列号并且利用第一调制方案进行调制。 第二调制部分可以基于第二输入信号输出第二多个码块，其中第二多个码块中的每一个具有与之相关联的第二序列号，并用第二调制方案进行调制，并且其中第二调制方案 与第一调制方案不同。 复用部分可以基于第一多个代码块，第二多个代码块和规划代码块来构成第三多个代码块。 规划代码块将第三多个代码块中的每一个与第一多个代码块和第二多个代码块中的相应代码块相关联。

公开(公告)号：USD560821S1

公开(公告)日：2008-01-29

申请号：US29248913

申请日：2006-09-08

申请人： Tony Mathias ,  David Roos ,  David Schneider

设计人： Tony Mathias ,  David Roos ,  David Schneider

公开(公告)号：US06859466B1

公开(公告)日：2005-02-22

申请号：US09707362

申请日：2000-11-07

申请人： Xiang Chen ,  Anthony Noerpel ,  Enrique Laborde ,  David Roos

发明人： Xiang Chen ,  Anthony Noerpel ,  Enrique Laborde ,  David Roos

IPC分类号： H04L1/00 ,  H04J3/06

CPC分类号： H04L1/0039 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/0072

摘要： An approach for is provided for adapting to a variety of link propagation conditions is disclosed. A source terminal generates a packet data burst that includes a header and an optional payload. The header is modulated using a default modulation scheme and is coded using a default coding scheme. A switch is configured to receive and to forward the packet data burst. A destination terminal is configured to demodulate the header using the default modulation scheme and the default coding scheme, and to examine the header to determine a particular coding scheme and a particular modulation scheme associated with the payload. The protocol can be applied to any radio communication system, particularly, to a satellite communication system with multiple satellite terminals.

摘要翻译： 公开了一种用于适应各种链路传播条件的方法。 源终端产生包括报头和可选有效载荷的分组数据突发。 使用默认调制方案调制报头，并使用默认编码方案进行编码。 交换机被配置为接收和转发分组数据突发。 目的地终端被配置为使用默认调制方案和默认编码方案来解调头部，并且检查头部以确定特定编码方案和与有效载荷相关联的特定调制方案。 该协议可以应用于任何无线电通信系统，特别是适用于具有多个卫星终端的卫星通信系统。