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公开(公告)号：CA2539901A1
公开(公告)日：2005-03-31
申请号：CA2539901
申请日：2004-09-21
Applicant: QUALCOMM INC
Inventor： SCHIFF LEONARD N , AMES WILLIAM G
Abstract: An apparatus and method for a wireless communication system in which a forward/uplink portion and a return/uplink portion are assigned within an available frequency bandwidth is disclosed. More particularly, a service area is divided into multiple regions. The assignment of the forward/uplink portion of the return/uplink portion is shuffled in the multiple regions. The apparatus and method may be implemented in a multi-beam wireless communication system.
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公开(公告)号：AU2003254143A1
公开(公告)日：2004-02-09
申请号：AU2003254143
申请日：2003-07-23
Applicant: QUALCOMM INC
Inventor： SCHIFF LEONARD N
IPC: H04B7/185
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公开(公告)号：AU761720B2
公开(公告)日：2003-06-05
申请号：AU6407999
申请日：1999-09-29
Applicant: QUALCOMM INC
Inventor： SCHIFF LEONARD N
Abstract: A method and apparatus for transmitting common information to a plurality of user terminals within a geographic region. The method and apparatus are useful in a satellite communication system (100) having a gateway (120, 122), and a plurality of satellites (116, 118) that orbit such that they are not stationary with respect to a point on the surface of the Earth. The method includes the step of generating a list identifying a plurality of common data channels (702) over which the common information will be transmitted. The list can include, for each of said plurality of common data channels, information identifying a predetermined satellite, beam (401-416), frequency, and channel. Due to the orbiting of the satellites (116, 118), the list changes over time. The method also includes the steps of transmitting (708), from the gateway to the geographic region (502, 504, 520, 522), the common information on the plurality of common data channels. The method also includes receiving (720), at a user terminal (124, 126), the common information over at least one of the plurality of common data channels.
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公开(公告)号：MXPA01009716A
公开(公告)日：2002-09-30
申请号：MXPA01009716
申请日：2000-03-29
Applicant: QUALCOMM INC
Inventor： SCHIFF LEONARD N
Abstract: Aparato y metodo para llamar a una terminal de usuario (UT) utilizando un sistema de comunicaciones satelital que tiene una puerta en comunicaciones de red y uno o mas satelites, en el que cada satelite produce una pluralidad (n) de haces y cada haz incluye una pluralidad de canales. El metodo de la presente invencion incluye el paso para volver a llamar a una primera posicion de la UT, en el que la primera posicion corresponde a una posicion de la UT en un primer tiempo ti. En una modalidad, esto se lleva a cabo al realizar una busqueda en una tabla o base de datos que incluye informacion de posicion para las terminales de usuario en diferentes puntos en el tiempo. El metodo incluye tambien el paso para determinar un primer grupo (g1) de haces el cual cubre la primera posicion de la UT en un segundo tiempo t2, en donde gl
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公开(公告)号：BR9914874A
公开(公告)日：2002-02-13
申请号：BR9914874
申请日：1999-10-26
Applicant: QUALCOMM INC
Inventor： SCHIFF LEONARD N
Abstract: An apparatus and method for using a variable loop gain in a double-loop power control system to control the power of a forward link signal sent by a gateway to a user terminal to compensate for fading in a wireless communications system. In one embodiment the invention includes the steps of detecting fast fading in the forward link signal and informing the gateway of the fast fading; and at the gateway, reducing the loop gain of the power control loop when fast fading is indicated. In another embodiment, the invention includes the steps of, at the gateway, detecting fast fading in a reverse link signal received from the user terminal and reducing the loop gain of the power control loop when fast fading is indicated.
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Patent Agency Ranking
公开(公告)号：AU9724001A
公开(公告)日：2002-02-07
申请号：AU9724001
申请日：2001-12-14
Applicant: QUALCOMM INC
Inventor： SCHIFF LEONARD N , MILLER DAVID S
IPC: H04Q7/38
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47.发明专利
公开(公告)号：CA2389384A1
公开(公告)日：2001-05-10
申请号：CA2389384
申请日：2000-10-27
Applicant: QUALCOMM INC
Inventor： SCHIFF LEONARD N
Abstract: A system and method for increasing feeder link capacity in a satellite communication system (100), wherein a gateway (108) communicates with a satellite (102) over a feeder link (112), and wherein the satellite (102) communicates with terrestrial user terminals (106) over a user link (110). A feeder link signal (112) is produced by multiplexing a first BPSK signal and a second BPSK signal (402). The feeder link signal (612) is QPSK modulated, QP SK spread (402). The feeder link signal (612) is transmitted from the gateway (108) to the satellite (102). The satellite (102) demultiplexes the feeder link signal (612), recovering the first and second BPSK signals (702, 704, 706). The first and second BPSK signals are then modulated (502-508)(602-608 ), to produce a first and second user link signal (832, 834). The user link signals (832, 834) are BPSK modulated, QPSK spread. The user link signals (832, 834) are transmitted from the satellite (102) to the user terminals (106).
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公开(公告)号：AU1235000A
公开(公告)日：2000-05-22
申请号：AU1235000
申请日：1999-10-26
Applicant: QUALCOMM INC
Inventor： SCHIFF LEONARD N
Abstract: An apparatus and method for using a variable loop gain in a double-loop power control system to control the power of a forward link signal sent by a gateway to a user terminal to compensate for fading in a wireless communications system. In one embodiment the invention includes the steps of detecting fast fading in the forward link signal and informing the gateway of the fast fading; and at the gateway, reducing the loop gain of the power control loop when fast fading is indicated. In another embodiment, the invention includes the steps of, at the gateway, detecting fast fading in a reverse link signal received from the user terminal and reducing the loop gain of the power control loop when fast fading is indicated.
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公开(公告)号：CA2337992A1
公开(公告)日：2000-02-03
申请号：CA2337992
申请日：1999-07-21
Applicant: QUALCOMM INC
Inventor： BUTLER BRIAN , KERNS ARTHUR S , CHOCKALINGAM ANANTHANARAYANAN , MARSH GENE W , GROVER DOUGLAS , GROB MATTHEW S , DETERMAN JAMES T , STEWART RICHARD A , ANTONIO FRANKLIN P , BJEREDE MARIE M , SCHIFF LEONARD N , AMES WILLIAM G
Abstract: Method for reducing call dropping rates in a multi-beam communication system that includes a user terminal, a gateway, and a plurality of beam sources projecting a plurality of beams, and where a link between the user terminal and the gateway is established on one or more beams. The method relies on a messaging protocol between the gateway and the user. Based on messages sent from the user to the gateway, preferably on a preselected periodic basis, th e gateway determines the more desirable beam(s) for transmitting to the user. The messages sent from the user to the gateway contain values representing beam strengths as measured at the user. The gateway uses the user measured beam strengths to select the beams that should be used for the user. The bea ms to be used are the beams that will decrease the call dropping rates and provide a desired level of beam source diversity.
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公开(公告)号：ZA963021B
公开(公告)日：1996-10-24
申请号：ZA963021
申请日：1996-04-16
Applicant: QUALCOMM INC
Inventor： ZEHAVI EPHRAIM , WOLF JACK K , SCHIFF LEONARD N
IPC: H04B7/15 , H04J3/24 , H04J11/00 , H04J13/00 , H04L1/00 , H04L12/28 , H04L12/56 , H04W72/04 , H04B , H04Q , H04L
Abstract: A variable rate transmission system wherein a packet of variable rate data generated by a variable rate data source is modulated on traffic channel by traffic channel modulator if the capacity of the traffic channel is capable of transmitting the packet. And where the packet of variable rate data is modulated onto traffic channel by traffic channel modulator and at least one overflow channel by traffic channel modulator, if the capacity of the traffic channel is less than required to transmit the packet. A receiving system for receiving variable rate data transmitted in accordance with the above.
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