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11. 发明授权

US5210771A Multiple user spread-spectrum communication system 失效
标题翻译：多用户扩频通信系统
公开(公告)号：US5210771A
公开(公告)日：1993-05-11
申请号：US739037
申请日：1991-08-01
申请人： Dennis R. Schaeffer , Michael D. Kotzin
发明人： Dennis R. Schaeffer , Michael D. Kotzin
IPC分类号： H04B7/26 , H04B7/005 , H04J4/00 , H04W36/16 , H04W52/50
CPC分类号： H04W52/50 , H04J4/00 , H04W36/16
摘要： A communication system having a site employing a plurality of communication channels. Each channel is assigned a desired received signal strength threshold. A channel is assigned to a subscriber unit based upon the strength of the signal received at the site and the power control range of the subscriber unit. The selection of a channel may be performed either by the site or the subscriber unit. In an FDMA environment, each separate frequency division channel may be assigned different received signal strength thresholds. In a non-overlapping time interval (TDMA) environment, each separate time division channel may be assigned different received signal strength thresholds. In another embodiment, a combination of FDMA and TDMA environments can be used.
摘要翻译：一种具有采用多个通信信道的站点的通信系统。每个通道被分配一个所需的接收信号强度阈值。基于在站点处接收到的信号的强度和用户单元的功率控制范围，将信道分配给用户单元。信道的选择可以由站点或用户单元执行。在FDMA环境中，每个单独的分频信道可被分配不同的接收信号强度阈值。在非重叠时间间隔（TDMA）环境中，每个单独的时分信道可被分配不同的接收信号强度阈值。在另一个实施例中，可以使用FDMA和TDMA环境的组合。

12. 发明授权

US5073971A Cellular radiotelephone communications system 失效
标题翻译：细胞无线电通信系统
公开(公告)号：US5073971A
公开(公告)日：1991-12-17
申请号：US402739
申请日：1989-09-05
申请人： Dennis R. Schaeffer
发明人： Dennis R. Schaeffer
IPC分类号： H04B7/26 , H04W16/02 , H04W16/12 , H04W16/24
CPC分类号： H04W16/12 , H04W16/02 , H04W16/24
摘要： A cellular radiotelephone communications system comprising a system of cells that are made up of an array of diretional sector antennas. These antennas are centrally located in the cell and radiates into a 60.degree. area of the cell. Each antenna in a cell has a group of frequencies assigned to it that is different than the group of frequencies assigned to the other antennas within that cell. These frequency groups are repeated either 2 or 8 times respectively in a 4 or 16 cell repeat pattern, effectively forming a two cell reuse pattern. The preferred embodiment of this invention is asymmetrically positioning the repeating frequency groups in an alternating fashion so that one row faces in the opposite direction of another row. The asymmetrical positioning of cells is possible only by departing from the prior art, cellular positioning rules. The positioning rules used in this invention create a 4 or 16 cell repeat pattern by locating co-channel cells closer in one direction than another.
摘要翻译：一种蜂窝无线电话通信系统，包括由直接扇区天线阵列组成的小区系统。这些天线位于电池的中心位置，并辐射到电池的60°区域。小区中的每个天线具有分配给它的一组频率，其不同于分配给该小区内的其他天线的频率组。这些频率组分别以4或16个单元重复模式重复2或8次，有效地形成了两个细胞重复使用模式。本发明的优选实施例是以交替的方式不对称地定位重复频率组，使得一排在另一行的相反方向上面对。只有通过脱离现有技术的蜂窝定位规则，单元的不对称定位是可能的。本发明中使用的定位规则通过将同信道信元定位在比另一方向更接近的方向上来创建4或16个信元重复模式。

13. 发明授权

US5048116A Signal routing system 失效
标题翻译：信号路由系统
公开(公告)号：US5048116A
公开(公告)日：1991-09-10
申请号：US356160
申请日：1989-05-24
申请人： Dennis R. Schaeffer
发明人： Dennis R. Schaeffer
IPC分类号： H01Q1/24 , H01Q3/24 , H01Q21/06 , H01Q21/20 , H04B7/00 , H04W88/08
CPC分类号： H04W88/08 , H01Q1/246 , H01Q21/06 , H01Q21/205 , H01Q3/24
摘要： A signal routing system for use in cellular RF communications systems wherein a signal can be routed to different antennas, effectively switching transmitters between antennas. The switching is accomplished by placing a frequency responsive device between a transmitter and each antenna. The transmitter is then coupled to an antenna through the frequency responsive device that has a resonant frequency equal to the transmitter's frequency. If the transmitter changes frequency, it will be switched to the appropriate antenna through the corresponding frequency responsive device. This system permits a sector of a cell to increase the number of frequencies in that sector to handle increased mobile traffic loads.

14. 发明授权

US5819181A Apparatus and method for mitigating excess time delay in a wireless communication system 失效
标题翻译：用于减轻无线通信系统中的超时延迟的装置和方法
公开(公告)号：US5819181A
公开(公告)日：1998-10-06
申请号：US609076
申请日：1996-02-29
申请人： Michael D. Kotzin , Dennis R. Schaeffer , John S. Csapo , Dennis J. Thompson , Stephen L. Spear
发明人： Michael D. Kotzin , Dennis R. Schaeffer , John S. Csapo , Dennis J. Thompson , Stephen L. Spear
IPC分类号： H04B7/26 , H04W36/04 , H04B7/01 , H04B7/20
CPC分类号： H04W36/04
摘要： A wireless communication system (200, 300, 400, 500) mitigates the effects of excess timing delay caused by varying lengths of communication paths. In one general implementation, a transition communication path (206, 323, 329) is used to transfer a time-advanced version of a timing reference signal so that the cumulative time delay at a transition cell (209, 325, 331) is reduced. In another general implementation, the timing reference signal is time-advanced in all communication paths (403-411), and selected communication paths (403-407) include a time delay means (423-427, 503-507) such that the cumulative time delay at an area (421) near a target coverage area (130) is reduced. By reducing the cumulative time delay at the area (421) near the target coverage area (130), a handoff of a communication of a mobile station (128) into the target coverage area (130) can be performed.
摘要翻译：无线通信系统（200,300,400,500）减轻了由不同长度的通信路径引起的超时定时延迟的影响。在一般的实现中，使用转移通信路径（206,323,329）来传送定时参考信号的时间高级版本，使得在转换小区（209,325,331）处的累积时间延迟减少。在另一个一般实现中，定时参考信号在所有通信路径（403-411）中是时间提前的，并且所选择的通信路径（403-407）包括时间延迟装置（423-427,503-507），使得累积在目标覆盖区域（130）附近的区域（421）处的时间延迟减小。通过减少目标覆盖区域（130）附近的区域（421）的累积时间延迟，可以执行移动站（128）的通信到目标覆盖区域（130）的切换。

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