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公开(公告)号：FI101582B1
公开(公告)日：1998-07-15
申请号：FI912155
申请日：1991-05-03
Applicant: MOTOROLA INC
Inventor： SCHAEFFER DENNIS R
Abstract: 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 DEG 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.
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公开(公告)号：DE68922512D1
公开(公告)日：1995-06-14
申请号：DE68922512
申请日：1989-02-03
Applicant: MOTOROLA INC
Inventor： SCHAEFFER DENNIS R
Abstract: An improved TDMA radiotelephone cellular communication system (122, 115, 199) employs an improved cell site scan monitoring technique. The technique includes monitoring radiotelephone calls, and tracking and recording their signal qualities. The records are used to maintain and determine which frequencies and which time partitions at the base site equipment (115, 119) are being utilized for radiotelephone communication. When a new call assignment is required at a cell site (115 or 119), it is assigned to a time partition of a base site equipment frequency in a frequency prioritized manner such that radiotelephone calls are concentrated within each frequency so as to reduce the number of frequencies carrying radiotelephone calls.
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公开(公告)号：FI912155A0
公开(公告)日：1991-05-03
申请号：FI912155
申请日：1991-05-03
Applicant: MOTOROLA INC
Inventor： SCHAEFFER DENNIS R
Abstract: 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 DEG 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.
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公开(公告)号：CA2037906A1
公开(公告)日：1991-03-06
申请号：CA2037906
申请日：1990-07-27
Applicant: MOTOROLA INC
Inventor： SCHAEFFER DENNIS R
Abstract: 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 DEG 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.
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5.发明申请METHOD AND APPARATUS FOR PRODUCING DELAY OF A CARRIER SIGNAL FOR IMPLEMENTING SPATIAL DIVERSITY IN A COMMUNICATION SYSTEM 审中-公开用于生成用于在通信系统中实现空间多样性的载波信号的延迟的方法和装置
公开(公告)号：WO9851027A3
公开(公告)日：1999-03-11
申请号：PCT/US9803171
申请日：1998-02-18
Applicant: MOTOROLA INC
Inventor： KOTZIN MICHAEL D , SCHAEFFER DENNIS R
CPC classification number: H04B7/0894 , H04B7/0671
Abstract: A method and apparatus for implementing spatial diversity utilizing coaxial interconnections (712, 707) between a plurality of receivers (708), transmitters (713) and radiating elements (706, 704) in a communication system (700) is disclosed. The long coaxial line (707) used for feeding associated receive antennas (706) is used for creating delay of a signal (729) for implementing downlink diversity. Similarly, the long coaxial line (712) used for feeding associated transmit antennas (704) is used for creating delay of a signal (760) for implementing uplink diversity. The method and apparatus, in particular, further includes utilization of at least one of the radiating elements (706) for receiving a signal (709) and transmitting a delayed version of a signal (705) to be transmitted.
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Patent Agency Ranking6.发明申请
公开(公告)号：WO0227966A3
公开(公告)日：2002-08-01
申请号：PCT/US0126129
申请日：2001-08-21
Applicant: MOTOROLA INC
Inventor： LOVE ROBERT T , GOLDSTEIN BRENT L , SCHAEFFER DENNIS R , NIKIDES ROBERT S
IPC: H04B7/005
CPC classification number: H04W52/325
Abstract: A wireless code division multiple access (CDMA) network control element optimizes pilot signal strength. The element includes at least one pilot signal strength measurement cache (202) containing multiple pilot signal strength measurements from multiple system user devices; and at least one processor (208), operatively coupled to the pilot signal strength measurement cache (202), that generates dynamic pilot power control information (132) for multiple pilot signals in response to a comparison of the multiple pilot signal strength measurements from the multiple system user devices to at least one pilot power threshold associated with each pilot signal. In another embodiment, a method for optimizing pilot signal strength includes receiving multiple pilot signal strength measurements, such as instantaneous pilot signal strength measurements from multiple user devices, and dynamically adjusting a pilot signal power level for at least one pilot signal in response to the multiple pilot signal strength measurements.
Abstract translation: 无线码分多址（CDMA）网络控制元件优化导频信号强度。 该元件包括至少一个导频信号强度测量缓存（202），其包含来自多个系统用户设备的多个导频信号强度测量; 和可操作地耦合到所述导频信号强度测量高速缓存（202）的至少一个处理器（208），其响应于来自所述导频信号强度测量高速缓存器（202）的所述多个导频信号强度测量结果的比较而生成用于多个导频信号的动态导频功率控制信息 多个系统用户设备到与每个导频信号相关联的至少一个导频功率阈值。 在另一个实施例中，一种用于优化导频信号强度的方法包括：接收多个导频信号强度测量，诸如来自多个用户设备的瞬时导频信号强度测量;以及响应于该多个导频信号动态调整用于至少一个导频信号的导频信号功率水平 导频信号强度测量。
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公开(公告)号：AU8516201A
公开(公告)日：2002-04-08
申请号：AU8516201
申请日：2001-08-21
Applicant: MOTOROLA INC
Inventor： LOVE ROBERT T , GOLDSTEIN BRENT L , SCHAEFFER DENNIS R , NIKIDES ROBERT S
IPC: H04B7/005
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公开(公告)号：CA2217574C
公开(公告)日：2001-06-19
申请号：CA2217574
申请日：1996-12-13
Applicant: MOTOROLA INC
Inventor： SPEAR STEPHEN L , THOMPSON DENNIS J , CSAPO JOHN S , KOTZIN MICHAEL D , SCHAEFFER DENNIS R
Abstract: A wireless communication system (200, 300, 400, 500) mitigates the effects o f 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 tha t the cumulative time delay at a transition cell (209, 325, 331) is reduced. I n 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 coverag e area (130), a hand-off of a communication of a mobile station (128) into the target coverage area (130) can be performed.
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公开(公告)号：BR9604987A
公开(公告)日：1999-05-25
申请号：BR9604987
申请日：1996-12-13
Applicant: MOTOROLA INC
Inventor： KOTZIN MICHAEL D , SCHAEFFER DENNIS R , CSAPO JOHN S , THOMPSON DENNIS J , SPEAR STEPHEN L
Abstract: 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.
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公开(公告)号：CA1299781C
公开(公告)日：1992-04-28
申请号：CA584960
申请日：1988-12-05
Applicant: MOTOROLA INC
Inventor： SCHAEFFER DENNIS R
Abstract: CE12r An improved TDMA radiotelephone cellular communication system employs an improved cell site scan monitoring technique. The technique includes monitoring radiotelephone calls, and tracking and recording their signal qualities. The records are used to maintain and determine which frequencies and which time partitions at the base site equipment are being utilized for radiotelephone communication. When a new call assignment is required at a cell site, it is assigned to a time partition of a base site equipment frequency in a frequency prioritized manner such that radiotelephone calls are concentrated within each frequency so as to reduce the number of frequencies carrying radiotelephone calls.
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