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1. 发明授权

US5561836A Method and apparatus for qualifying access to communication system services based on subscriber unit location 失效
标题翻译：基于用户单元位置对通信系统服务进行访问的方法和装置
公开(公告)号：US5561836A
公开(公告)日：1996-10-01
申请号：US236801
申请日：1994-05-02
申请人： Kenneth L. Sowles , David Terris , James P. Redden
发明人： Kenneth L. Sowles , David Terris , James P. Redden
IPC分类号： G01S19/06 , H04B7/185
CPC分类号： H04B7/18545
摘要： A communication system qualifies access to the services it provides to subscriber units based upon the locations of the subscriber units. Subscriber unit location data are routed through a satellite to a gateway where a home subscriber information manager for the subscriber unit resides. This home gateway selects a service control area and corresponding serving gateway to use in establishing calls to and from the subscriber unit. When an area of uncertainty for the subscriber unit's location overlies a boundary between service control areas, additional location data may be obtained to shrink the area of uncertainty. If the area still overlies a boundary, a serving gateway is selected based upon the current serving gateway, the home gateway, and the service control area where the center of the area of uncertainty resides.
摘要翻译：通信系统基于用户单元的位置来限制对其向订户单元提供的服务的访问。用户单元位置数据通过卫星路由到用户单元驻留的归属用户信息管理器的网关。该家庭网关选择服务控制区域和相应的服务网关，用于建立与来自用户单元的呼叫。当用户单元的位置的不确定区域覆盖服务控制区域之间的边界时，可以获得附加位置数据来缩小不确定性区域。如果区域仍然在边界上，则基于当前服务网关，家庭网关和不确定区域的中心的服务控制区域来选择服务网关。

2. 发明授权

US5552795A Location determination method and system using multi-beam satellites 失效
标题翻译：使用多光束卫星的位置确定方法和系统
公开(公告)号：US5552795A
公开(公告)日：1996-09-03
申请号：US237705
申请日：1994-05-03
申请人： Daniel R. Tayloe , Kenneth L. Sowles
发明人： Daniel R. Tayloe , Kenneth L. Sowles
IPC分类号： G01S5/02 , G01S5/14 , G01S19/25 , H04B7/185 , C01S5/02 , H04M11/00
CPC分类号： H04B7/1855 , G01S5/02 , G01S5/14
摘要： In a method and system for performing location determination using multi-beam satellites each beam of a multi-beam satellite transmits identification information which is received by a user terminal. This identification information either identifies the unique beam by enumeration or by geometrics. A user terminal processes multiple received signals from orbiting satellites. The user terminal maps the projected beam patterns of multiple received samples to determine an approximate self-location. The user terminal passively monitors its location and compares its current location with its previously reported location. When the user terminal has sufficiently roamed from its previously registered location, the user terminal performs an auto-registration to the system allowing for efficient routing of information.
摘要翻译：在使用多波束卫星执行位置确定的方法和系统中，多波束卫星的每个波束发射由用户终端接收的识别信息。该识别信息通过枚举或几何来识别唯一的波束。用户终端处理来自轨道卫星的多个接收信号。用户终端映射多个接收样本的投影波束图案以确定近似的自身位置。用户终端被动地监视其位置并将其当前位置与其先前报告的位置进行比较。当用户终端从其先前注册的位置充分漫游时，用户终端对系统进行自动注册，允许信息的有效路由。

3. 发明授权

US5537681A Communication network with incoming calls directed through moving cells and method for operating same 失效
标题翻译：具有通过移动小区引导的来电的通信网络及其操作方法
公开(公告)号：US5537681A
公开(公告)日：1996-07-16
申请号：US235995
申请日：1994-05-02
申请人： James P. Redden , Kenneth L. Sowles , David Terris
发明人： James P. Redden , Kenneth L. Sowles , David Terris
IPC分类号： H04B7/185 , H04Q7/00
CPC分类号： H04B7/1855 , H04B7/1856
摘要： A network includes a system and a population of subscriber units. System satellites move in low earth orbits and form moving cells on the surface of the earth. A pattern of static areas that covers the service area of the system is defined in a map. The system discovers the static areas for the subscriber units. When an incoming call needs to be directed to a subscriber unit, the subscriber unit's static area is converted into identities of beams that form the cells that coincide with the static area. A ring signal is transmitted in only these cells. Subscriber units monitor area identification signals that identify the static areas coincident with the cells where the signals are transmitted. When the static area known by the system is not among the identified static areas, a subscriber unit engages in re-registration communications.
摘要翻译：网络包括系统和用户单元的群体。系统卫星在低地球轨道上移动，并在地球表面形成移动细胞。覆盖系统服务区域的静态区域的模式在地图中定义。系统发现用户单元的静态区域。当来电需要被引导到用户单元时，用户单元的静态区域被转换成形成与静态区域一致的小区的波束的身份。仅在这些单元中传送振铃信号。用户单元监视识别与发送信号的小区一致的静态区域的区域识别信号。当系统已知的静态区域不在所识别的静态区域中时，用户单元进行重新注册通信。

4. 发明授权

US5659545A Apparatus for mobile unit acquisition in a satellite communication system and method therefor 失效
标题翻译：卫星通信系统中移动单元采集的装置及其方法
公开(公告)号：US5659545A
公开(公告)日：1997-08-19
申请号：US339998
申请日：1994-11-15
申请人： Kenneth L. Sowles , Ralph C. Gregg , Keith A. Olds
发明人： Kenneth L. Sowles , Ralph C. Gregg , Keith A. Olds
IPC分类号： H04B7/185 , H04J4/00
CPC分类号： H04B7/18558
摘要： To obtain service from a satellite communication system, a mobile subscriber unit must acquire a TDMA communication channel. Because the satellites move with respect to the surface of the earth, propagation delays and Doppler shift affect the timing and frequency of received signals. A mobile subscriber unit synchronizes to the frequency and timing windows of a satellite communication station by receiving frequency and timing corrections during channel acquisition. The satellite initially estimates correction factors during initial acquisition requests and further estimates correction factors from synchronization bursts from the subscriber unit.
摘要翻译：为了从卫星通信系统获得服务，移动用户单元必须获取TDMA通信信道。由于卫星相对于地球表面移动，传播延迟和多普勒频移影响接收信号的定时和频率。移动用户单元通过在信道获取期间接收频率和定时校正来与卫星通信站的频率和定时窗口同步。卫星初始估计初始获取请求期间的校正因子，并进一步估计来自用户单元的同步脉冲串的校正因子。

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