公开(公告)号：CA2380994C

公开(公告)日：2010-03-09

申请号：CA2380994

申请日：2000-08-30

Applicant: QUALCOMM INC

Inventor： SOLIMAN SAMIR S

IPC: G01S1/00 ,  H04B1/707 ,  H04B1/7075 ,  H04B1/7115 ,  H04L27/00 ,  H04W12/10 ,  H04W48/16 ,  H04W64/00

Abstract: A method and apparatus for conducting a pilot signal search in a wireless communications network. The location of a mobile is determined within the network. This location is then used in determining search window sizes and other search parameter information that is used to search all pilot signals identified in a designated pilot signal set. Search window size is also determined based upon the location of the mobile and another component related to multipath effects for a transmitted pilot signal.

公开(公告)号：CA2346672C

公开(公告)日：2009-11-03

申请号：CA2346672

申请日：1999-10-05

Applicant: QUALCOMM INC

Inventor： SOLIMAN SAMIR S

IPC: H04W24/00 ,  H04B7/26 ,  H04W28/08 ,  H04W36/22 ,  H04W68/00 ,  H04W72/08 ,  H04W74/00

Abstract: A method and apparatus for detecting forward and reverse link imbalances in a digital cellular communication system. The method preferably uses an indication of "maximum access probes" (104) to determine whether a link imbalance caused a reverse link failure to occur. The maximum access probes condition indicates that a wireless unit has attempted to access a base station a pre-defined maximum number of times. The method preferably uses an, indication of a lost paging channel (132) and a traffic channel initialization (TCI) time out (160) to determine whether a link imbalance caused a forward link failure to occur. If the wireless unit did not lose the paging channel (132), the method determines whether a TCI time out occurred (160). If the wireless unit lost the paging channel, or it did not lose the paging channel but a TCI time out occurred, the method determines the cause for the forward link failure. There are two potential causes in this scenario: (1) either the wireless unit is a significant distance from the base station; or (2) the paging channel suffers from significant interference. The method determines the cause and either instructs the wireless unit to perform an idle handoff to a neighboring base station or to exit the digital system.

公开(公告)号：DE69940304D1

公开(公告)日：2009-03-05

申请号：DE69940304

申请日：1999-03-16

Applicant: QUALCOMM INC

Inventor： SOLIMAN SAMIR S ,  GILHOUSEN KLEIN S

IPC: G01S19/23 ,  G01S1/00 ,  G01S5/00 ,  G01S5/02 ,  G01S5/14 ,  G01S19/03 ,  G01S19/09 ,  G01S19/12 ,  G01S19/25 ,  G01S19/46 ,  G04G7/00 ,  G04G7/02 ,  H04B7/15 ,  H04W64/00

Abstract: A system and method for determining a position of a mobile wireless transceiver. A Doppler shift of signals transmitted from first and second satellites, respectively, relative to a base station is calculated. A first set of pseudo ranges of the first and second satellites, respectively, relative to the base station is also calculated. Satellite identification information, Doppler shift information, and the pseudo range information between the base station and the wireless transceiver is sent to wireless transceiver. The wireless transceiver use the information received from the base station to identify a second set of pseudo ranges between the wireless transceiver and the first and second satellites, respectively, at a time tx. The wireless transceiver sends the second set of pseudo ranges between the wireless transceiver and the first and second satellites, respectively, along with time information tx to the base station, in response to which, the base station calculate the position of the wireless transceiver.

公开(公告)号：DK1190501T3

公开(公告)日：2008-12-15

申请号：DK00939640

申请日：2000-06-06

Applicant: QUALCOMM INC

Inventor： SOLIMAN SAMIR S

IPC: H04B7/005 ,  H04B7/26 ,  H04W16/04

Abstract: A system and method for monitoring the load on a CDMA communication system having a base station and a plurality of users. A measure of voice activity in the communication system is determined, and a current value of frequency reuse efficiency equal to an initial value of frequency reuse efficiency is provided. A power determination is made according to the measured voice activity and the current value of frequency reuse efficiency. The current value of frequency reuse efficiency is updated using the power determination to provide a new current value of frequency reuse efficiency. The power determination and the update of the frequency reuse efficiency are iteratively repeated until convergence to provide a converged value of frequency reuse efficiency. The load on the communication system is then determined according to the converged frequency reuse efficiency value.

公开(公告)号：CA2673864A1

公开(公告)日：2008-07-17

申请号：CA2673864

申请日：2007-12-27

Applicant: QUALCOMM INC

Inventor： SOLIMAN SAMIR S

IPC: H04L12/56 ,  H04W68/00 ,  H04W84/18 ,  H04W88/06

Abstract: Techniques for extending coverage of a wireless communication network (e. g., a cellular network) to indoor and other locations are described. A wirel ess device may communicate with a base station in a wireless network via dow nlink and uplink frequency channels in a licensed frequency band using frequ ency division duplexing (FDD). The wireless device may communicate with a pi conet base station (PBS) in a pico network (piconet) via the uplink frequenc y channel using time division duplexing (TDD). The PBS may communicate with the wireless device on the uplink frequency channel and may exchange data wi th the wireless network via a wireline communication link. The PBS may forwa rd data received from the wireless device to the wireless network and may al so forward data received from the wireless network for the wireless device t o the wireless device. The PBS may receive paging messages from the wireless network for the wireless device and may forward the paging messages to the wireless device.

公开(公告)号：AU2003220296B2

公开(公告)日：2008-03-13

申请号：AU2003220296

申请日：2003-03-13

Applicant: QUALCOMM INC

Inventor： SOLIMAN SAMIR S

IPC: H04Q9/00 ,  G01D4/00 ,  G08C17/02 ,  H04B7/26

Abstract: A wireless remote telemetry system uses low-cost, low-power ad-hoc networks to provide flexible reading and control of remote devices. In an embodiment applicable to a utility service, consumption of electrical power among a population of customers is measured by a utility metering system having ad-hoc network communication capability. The remote metering unit transmits information over an ad-hoc network to one or more intermediate communication units or hops. The intermediate communication units or hops include a mobile unit, a mobile base unit, a subscriber home computer, and a home base unit. Each of these hops may co-exist in the same large-scale system. The intermediate communication units transfer the received information to a central controller through multi-hop ad-hoc networks or cellular networks, according to intelligent planning by the wireless infrastructure or the central unit.

公开(公告)号：DE69935439T2

公开(公告)日：2007-11-29

申请号：DE69935439

申请日：1999-10-05

Applicant: QUALCOMM INC

Inventor： SOLIMAN SAMIR S

IPC: H04B7/26 ,  H04W68/00 ,  H04W72/08 ,  H04W74/00

Abstract: An apparatus (402, 404) is provided for detecting link imbalances in a digital cellular communications system including a plurality of wireless units (400) and base stations. The apparatus (402, 404) determines if a link failure in a first radio link between a wireless unit (400) and a base station during call initialisation, whether the link failure is a reverse or forward link failure, whether the link failure is due to a link imbalance in the first radio link, and if so instructs the wireless unit (400) to switch to a second radio link. If the link failure is due to a weak reverse link, the apparatus (402, 404) determines the maximum number of access probes. If the wireless unit (400) has transmitted the maximum number of probes, then communication is initiated on a secondary communication system, or an idle state is entered and communication reinitiated with a primary digital cellular communication system.

公开(公告)号：MY131784A

公开(公告)日：2007-08-30

申请号：MYPI9501961

申请日：1995-07-12

Applicant: QUALCOMM INC

Inventor： SOLIMAN SAMIR S

IPC: H04J13/04 ,  H04B7/005 ,  H04B7/26 ,  H04B17/00 ,  H04W16/10 ,  H04W52/18 ,  H04W52/34

Abstract: A METHOD AND APPARATUS FOR SIMULATING SIGNAL INTERFERENCE WITHIN A COMMUNICATION SYSTEM, SUCH WIRELESS OR CELLULAR COMMUNICATION SYSTEMS. THE COMMUNICATION SYSTEM IS PREFERABLY OF A TYPE IN WHICH CODE DIVISION MULTIPLE ACCESS (CDMA) SPREAD SPECTRUM COMMUNICATION SIGNALS ARE USED. THE METHOD FOR SIMULATING SIGNAL INTERFERENCE POWER RECEIVED BY A BASE STATION RECEIVER INCLUDES ESTIMATING A FIRST SIGNAL POWER CORRESPONDING TO THE SUM OF SIGNAL TRANSMITTED BY A FIRST SET OF SIMULATED USERS LOCATED IN A FIRST CELL. AN ESTIMATE IS ALSO MADE OF A FIRST NORMALIZED DATA RATE FOR TRANSMISSION OF THE COMPOSITE SIGNAL. A FIRST INTERFERENCE SIGNAL IS THEN GENERATED AT A POWER LEVEL DETERMINED ON THE BASIS OF THE FIRST COMPOSITE SIGNAL POWER AND NORMALIZED DATA RATE. IN A PREFERRED IMPLEMENTATION, THE FIRST INTERFERENCE SIGNAL POWER IS ADJUSTED IN ACCORDANCE WITH AN AVERAGE POWER FLUCTUATION ARISING AS A CONSEQUENCE OF CLOSED LOOP POWER CONTROL. FURTHER, A SECOND COMPOSITE SIGNAL POWER IS DETERMINED BY ESTIMATING THE SUM OF SIGNAL POWER TRANSMITTED BY A SECOND SET OF SIMULATED USERS LOCATED OUTSIDE OF THE FIRST CELL. A SIMILAR ESTIMATE IS MADE OF A SECOND NORMALIZED DATA RATE AT WHICH THIS SIGNAL POWER IS TRANSMITTED BY THE SECOND SET OF SIMULATED USERS. THIS ALLOW THE GENERATION OF A SECOND INTERFERENCE SIGNAL BASED ON THE SECOND COMPOSITE SIGNAL POWER AND NORMALIZED DATA RATE. GENERATION OF THE FIRST INTERFERENCE SIGNAL WILL TYPICALLY INVOLVE SYNTHESIS OF ELECTRICAL NOISE IS OVER A PREDETERMINED FREQUENCY BAND. THE POWER OF THE ELECTRICAL NOISE IS THEN ADJUSTED IN ACCORDANCE WITH THE PRODUCT OF THE FIRST COMPOSITE SIGNAL POWER AND THE FIRST NORMALIZED DATA RATE. FURTHERMORE, A RANDOM VARIABLE SEQUENCE MAY BE USED TO MODEL VARIATIONS IN THE FIRST COMPOSITE SIGNAL POWER.

公开(公告)号：AU2002215342B2

公开(公告)日：2007-06-28

申请号：AU2002215342

申请日：2001-10-11

Applicant: QUALCOMM INC

Inventor： AGASHE PARAG A ,  GAAL PETER ,  FERNANDEZ-CORBATON IVAN JESUS ,  SOLIMAN SAMIR S ,  STEIN JEREMY M ,  VAYANOS ALKINOOS H

IPC: G01S1/00 ,  G01S19/05 ,  G01S19/25 ,  H04B1/707

Abstract: A system and method for assisting an integrated GPS/wireless terminal unit in acquiring one or more GPS satellite signals from the GPS satellite constellation. The invention includes a method for narrowing the PN-code phase search. That is, by accounting for the variables in geographic location and time delay relative to GPS time, the systems and methods of the present invention generate a narrow code-phase search range that enables the terminal unit to more quickly acquire and track the necessary GPS satellites, and thereby more quickly provide accurate position information to a requesting entity.

公开(公告)号：BR0308464A

公开(公告)日：2007-03-27

申请号：BR0308464

申请日：2003-03-13

Applicant: QUALCOMM INC

Inventor： SOLIMAN SAMIR S

IPC: G01D4/00 ,  G08C17/02 ,  H04B7/26 ,  H04Q9/00

Abstract: A wireless remote telemetry system uses low-cost, low-power ad-hoc networks to provide flexible reading and control of remote devices. In an embodiment applicable to a utility service, consumption of electrical power among a population of customers is measured by a utility metering system having ad-hoc network communication capability. The remote metering unit transmits information over an ad-hoc network to one or more intermediate communication units or hops. The intermediate communication units or hops include a mobile unit, a mobile base unit, a subscriber home computer, and a home base unit. Each of these hops may co-exist in the same large-scale system. The intermediate communication units transfer the received information to a central controller through multi-hop ad-hoc networks or cellular networks, according to intelligent planning by the wireless infrastructure or the central unit.