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公开(公告)号：US06571102B1
公开(公告)日：2003-05-27
申请号：US09634426
申请日：2000-08-08
IPC分类号： H04Q720
CPC分类号： H04W72/06 , H04B7/18563 , H04B7/18591 , H04W28/10 , H04W28/20 , H04W28/22 , H04W36/00 , H04W74/04 , H04W84/06
摘要： A narrowband communication system provides wideband data services in a secondary service band. This limits the impact on primary services in peak traffic regions in that the primary service band is not required to download wideband data from a communication node (e.g., a satellite) to a mobile terminal. The narrowband communication system implements a handoff protocol (400) that rate negotiates a channel bandwidth of an active connection (404) to the amount of channels that are available in a new cell. The narrowband communication system preempts (414) lower priority subscribers when a higher priority (408) high-speed data terminal requires access to the system and a requested channel assignment is not available (412). The complexity of a high-speed data terminal communication chipset is reduced by a receiver design that minimizes the range of frequencies that are required to be demodulated.
摘要翻译： 窄带通信系统在次要业务频带中提供宽带数据业务。 这限制了峰值业务区域对主要业务的影响，因为不需要主要业务频带将宽带数据从通信节点（例如，卫星）下载到移动终端。 窄带通信系统实现将活动连接（404）的信道带宽协调到新小区中可用的信道量的切换协议（400）。 当较高优先级（408）高速数据终端需要访问系统并且所请求的频道分配不可用时，窄带通信系统抢占（414）低优先级用户（412）。 高速数据终端通信芯片组的复杂度通过最小化需要解调的频率范围的接收机设计来减少。
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公开(公告)号：US5732351A
公开(公告)日：1998-03-24
申请号：US522034
申请日：1995-08-31
CPC分类号： H04B7/18541 , H04W36/18
摘要： In a satellite communication system (10), a subscriber unit (26) is assigned a communication channel (17). The channel is used in the present cell (54) as well as subsequent cells (54) as the cells move relative to the earth. The channel is assigned using a cost function which includes a distance factor and an isolation factor. The distance factor which is based on a geographic distance between the nearest use of an interfering channel and the subscriber unit's cell. The isolation factor includes an interference potential between two channels. As a result of this channel assignment process, channels become associated with the geographic location of the subscriber unit. Accordingly, subscriber unit communications on the same satellite are handed-off between cells using the same channel making hand-offs invisible to the subscriber unit (26). When a hand-off is needed to another satellite, the same channel may also be used, or a new channel assigned using the cost function.
摘要翻译： 在卫星通信系统（10）中，向用户单元（26）分配通信信道（17）。 当小区相对于地球移动时，该信道用于本小区（54）以及随后的小区（54）。 使用包括距离因子和隔离因子的成本函数来分配信道。 基于最近使用干扰信道与用户单元的小区之间的地理距离的距离因子。 隔离因子包括两个通道之间的干扰电位。 作为该信道分配处理的结果，信道变得与用户单元的地理位置相关联。 因此，使用相同信道的小区之间切换在同一卫星上的用户单元通信，使切换对于用户单元（26）不可见。 当另一个卫星需要切换时，也可以使用同一个信道，或者使用成本函数分配新的信道。
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3.发明授权
公开(公告)号：US5732387A
公开(公告)日：1998-03-24
申请号：US566617
申请日：1995-12-04
CPC分类号： H04B7/1855 , H04B7/18545 , H04B7/18558
摘要： A subscriber unit (26) contains location data that expires after predetermined time periods that are based on the subscriber's mobility. When the location data has not expired, the subscriber unit requests access (108) to a satellite communication system (10) by providing location data within an access request message. The communication system performs a quick check (214) to validate the location data. Accordingly, time-consuming geo-location procedures are avoided when a call is initiated or being received. When the location data has expired, the subscriber unit requests access (110) without providing location data within the access request message. The communication system performs a complete geolocation procedure (210) to determine valid location data for the subscriber unit. The location data is sent (211) to the subscriber unit and time stamped (113).
摘要翻译： 订户单元（26）包含在基于用户的移动性的预定时间段之后到期的位置数据。 当位置数据尚未到期时，订户单元通过在访问请求消息内提供位置数据来请求对卫星通信系统（10）的访问（108）。 通信系统执行快速检查（214）来验证位置数据。 因此，当呼叫被启动或被接收时，避免了耗时的地理位置过程。 当位置数据已经到期时，用户单元请求访问（110）而不在访问请求消息内提供位置数据。 通信系统执行完整的地理定位过程（210）以确定用户单元的有效位置数据。 位置数据被发送（211）到用户单元并加上时间戳（113）。
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4.发明授权Methods and apparatus for using ground based processing resources to support orbiting satellites 有权使用地面处理资源支持轨道卫星的方法和装置公开(公告)号：US06553208B1
公开(公告)日：2003-04-22
申请号：US09663520
申请日：2000-09-15
IPC分类号： H04Q734
CPC分类号： H04B7/18515
摘要： A plurality of orbiting satellites (102-112), each comprised of an onboard computer (142). Each of the orbiting satellites and a plurality of ground-based computers (114-124) are utilized to perform delay-insensitive functions associated with the orbiting satellites. An ubiquitous data link (128-138) is maintained between each satellite and one or more of the ground-based computers. The integrated system is configured to allow a satellite to generate a remote procedure call (RPC), transmit the RPC to a ground-based computer, whereupon the ground-based computer processes the RPC and transmits a response back to the satellite. Delay-sensitive tasks and functions are performed by the computer onboard the satellite; delay-insensitive tasks are advantageously performed by the ground-based computer assets.
摘要翻译： 多个轨道卫星（102-112），每个卫星包括车载计算机（142）。 每个轨道卫星和多个基于地面的计算机（114-124）用于执行与轨道卫星相关联的延迟不敏感的功能。 在每个卫星和一个或多个地面计算机之间保持无所不在的数据链路（128-138）。 集成系统被配置为允许卫星生成远程过程调用（RPC），将RPC传送到基于地面的计算机，于是基于地面的计算机处理RPC并将响应发送回卫星。 延迟敏感的任务和功能由卫星上的计算机执行; 有利于基于地面的计算机资产执行延迟不敏感的任务。
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5.发明授权Method and apparatus for reducing signal blocking in a satellite communication system 失效用于减少卫星通信系统中的信号阻塞的方法和装置
公开(公告)号：US6138012A
公开(公告)日：2000-10-24
申请号：US905623
申请日：1997-08-04
CPC分类号： H04B7/18513 , H04B7/18534
摘要： A communication system is established for providing dual-coverage areas using communication satellites, one or more terrestrial stations and one or more dual-coverage subscriber units (DCSU). The communication system determines when and where to establish dual-coverage areas. Dual-coverage areas are provided using separate beams from two or more satellites. The satellites can be located in a variety of orbits around the earth. DCSUs receive signals and process data from at least two satellites at one time. DCSUs can also transmit signals to at least two satellites at one time. Data packets which are missing from one channel are replaced by data packets on another channel. Path delays are compensated for on the transmit side to minimize processing requirements on the receive side.
摘要翻译： 建立了一种通信系统，用于提供使用通信卫星，一个或多个地面站和一个或多个双覆盖用户单元（DCSU）的双重覆盖区域。 通信系统决定何时何地建立双重覆盖区域。 使用来自两个或更多个卫星的分离的波束提供双重覆盖区域。 卫星可以位于地球周围的各种轨道上。 DCSU一次从至少两颗卫星接收信号并处理数据。 DCSU也可以一次向至少两颗卫星传输信号。 从一个通道丢失的数据包由另一个通道上的数据包替换。 在发送端补偿路径延迟以最小化接收侧的处理要求。
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