公开(公告)号：BR0013932A

公开(公告)日：2006-06-06

申请号：BR0013932

申请日：2000-09-14

Applicant: QUALCOMM INC

Inventor： AMERGA MESSAY

IPC: H04B1/7117 ,  H04B7/02 ,  H04B7/04 ,  H04Q7/22 ,  H04B1/707

Abstract: A method and communication system for assigning the plurality of fingers to demodulation paths in a path list which insures that at least one finger will be assigned to a demodulation path supporting a supplemental channel, if one exists. The method involves determining whether any of the fingers is demodulating a supplemental channel (112). When no fingers are demodulating supplemental channels, the it is determined whether the sector containing the path under consideration supports supplemental channels (114). If the sector containing the path under consideration supports supplemental channels, then the method determines the strength of the signal path relative to the weakest finger (116). If the path is a certain amount greater in strength then the weakest finger, then the method involves reassigning that finger to the path with the supplemental channel (108) and if the path with the supplemental channel is a certain amount of strength weaker than the weakest finger plus a certain value, then the method involves determining whether the weakest finger is the only one supporting the supplemental channel (118). If the weakest finger is the only one supporting supplemental channels, and the sector supports supplemental channels (120), then that finger is assigned to the demodulation path with the supplemental channel (108), thus insuring that the information on a supplemental channel is always demodulated by a finger during a soft-handoff in a high data rate call if one or more fingers are already demodulating supplemental channels, then the finger assignment algorithm will proceed in the conventional way.

公开(公告)号：BR0213695A

公开(公告)日：2004-12-28

申请号：BR0213695

申请日：2002-10-25

Applicant: QUALCOMM INC

Inventor： RICK ROLAND R ,  RISTIC BORISLAV ,  AMERGA MESSAY ,  STEIN JEREMY M ,  FERNANDEZ-CORBATON IVAN JESUS ,  BHATIA ASHOK

IPC: G01S5/02 ,  G01S19/09 ,  G01S19/46 ,  H04B1/7075 ,  H04B1/707 ,  G01S5/14

Abstract: A parameter estimator for estimating one or more parameter(s) from a correlation function derived from a signal using a dynamically variable search window is described. The parameter estimator may be employed in a subscriber station to estimate the time of arrival of one or more base station pilot signals in a wireless communication system. This information may be utilized in an overall advanced forward link trilateration (AFLT) process for estimating the location of the subscriber station.

公开(公告)号：AU2003262934A8

公开(公告)日：2004-03-19

申请号：AU2003262934

申请日：2003-08-26

Applicant: QUALCOMM INC

Inventor： AMERGA MESSAY ,  HALBHAVI SUDHIR

IPC: H04B1/707 ,  H04W36/08 ,  H04W36/30 ,  H04W40/02 ,  H04W48/20 ,  H04W52/02 ,  H04W68/00 ,  H04Q7/32

Abstract: Techniques for cell reacquisition and reselection that increases time spent in low-power mode while effectively monitoring neighbor cells are disclosed. In one aspect, one or more windows around the expected location of the serving cell are searched in the period of time prior to the page indicator. In another aspect, intra-frequency neighbor cells are searched first to determine reselection candidates. Various other aspects are also presented. These aspects have the benefit of increasing time spent in low-power mode, thereby reducing power consumption and increasing standby time.

公开(公告)号：AU2003260017A8

公开(公告)日：2004-03-19

申请号：AU2003260017

申请日：2003-08-19

Applicant: QUALCOMM INC

Inventor： HALBHAVI SUDHIR ,  AMERGA MESSAY

IPC: H04B7/26 ,  H04W36/30 ,  H04W52/02 ,  H04Q7/38 ,  H04Q7/32

Abstract: Techniques for limiting cell reselection in response to a variable channel are disclosed. In one aspect, a measurement of received pilot power from a base station is used as an indication of channel quality. In another aspect, hysteresis is applied to limit cell reselection, wherein the hysteresis is greater in relatively higher quality channel environments and lower in relatively lower channel quality environments. Various other aspects are also presented. These aspects have the benefit of reducing cell reselection, thus increasing time spent in low-power mode, thereby reducing power consumption and increasing standby time.

公开(公告)号：AU2002359344A1

公开(公告)日：2003-05-19

申请号：AU2002359344

申请日：2002-11-01

Applicant: QUALCOMM INC

Inventor： RICK ROLAND R ,  AMERGA MESSAY ,  STEIN JEREMY M ,  FERNANDEZ-CORBATON IVAN

IPC: G01S5/02 ,  G01S19/19 ,  H04W64/00 ,  G01S1/04

Abstract: A method of producing a reliability metric for a parameter estimate derived from a signal using correlation analysis is described. The method begins by obtaining an indication of whether a non line of sight signal condition is present or likely and/or obtaining an indication of whether a multi-path signal condition is present or likely. Responsive to one or both of these indications, the method derives a reliability metric for the parameter estimate. In one embodiment, the parameter estimate is an estimate of time of arrival (TOA) of the signal, and the reliability metric is root mean square error (RMSE) of the time of arrival estimate. This embodiment obtains an indication of whether a non line of sight signal condition is present or likely based on a measure of the strength of the correlation function at the peak thereof. The measure of the strength of the correlation function at the peak thereof may be energy per chip divided by total received power (Ec/I0) or may simply be the raw energy of the correlation function at the peak. The RMSE metric which is computed in this embodiment varies inversely with the peak strength of the correlation function.

公开(公告)号：AU2002356873A1

公开(公告)日：2003-05-12

申请号：AU2002356873

申请日：2002-10-29

Applicant: QUALCOMM INC

Inventor： FERNANDEZ-CORBATON IVAN ,  BHATIA ASHOK ,  STEIN JEREMY M ,  RICK ROLAND R ,  AMERGA MESSAY ,  RISTIC BORISLAV

IPC: G01S1/00 ,  G01S19/11 ,  G01S5/14 ,  G01S1/04

Abstract: A parameter estimator for estimating one or more parameter(s) from a correlation function derived from a signal using a dynamically variable integration time is described. The parameter estimator may be employed in a subscriber station to estimate the time of arrival of one or more base station or sector pilot signals in a wireless communication system. This information may be utilized in an overall advanced forward link trilateration (AFLT) process for estimating the location of the subscriber station.

公开(公告)号：CA2450308A1

公开(公告)日：2003-01-03

申请号：CA2450308

申请日：2001-07-06

Applicant: QUALCOMM INC

Inventor： AMERGA MESSAY ,  RICK ROLAND ,  FERNANDEZ-CORBATON IVAN J

IPC: G01S1/00 ,  G01S5/02 ,  G01S5/14 ,  G01S19/22 ,  G01S19/40 ,  G01S19/42 ,  H04B1/707 ,  H04W24/00 ,  H04W28/04 ,  H04W84/06 ,  G01S1/02 ,  H04Q7/38

Abstract: A system and method are disclosed by which the effects of time of arrival errors may be reduced. In a mobile unit, such as a CDMA device, a correlatio n pulse is generated when a transmitted code matches a stored reference code. In the absence of multipath effects, correlation pulses are generated in respon se to the detection of multiple transmissions of the reference code from multip le transmitters. However, multipath effects distort the generated correlation pulses leading to errors in the time of arrival measurements. The present invention calculates the width of the correlation pulses and determines a delay correction factor based on the pulse width. The delay correction facto r is added to the measured delay time to provide a more accurate delay time, thus permitting more accurate location measurements based on time of arrival . In alternative embodiments, other signal factors may also be used to apply delay correction factors. The actual location determination may be performed by the mobile unit, or any other positioning determining entity (PDE). The system is also capable of applying correction factors to time of arrival signals received from global positioning system (GPS) satellites.

公开(公告)号：BR0014010A

公开(公告)日：2002-07-02

申请号：BR0014010

申请日：2000-09-15

Applicant: QUALCOMM INC

Inventor： ACHOUR BAAZIZ ,  AMERGA MESSAY ,  GLAZKO SERGUEI A

IPC: H04B1/7176 ,  H04B1/7117 ,  H04B7/02 ,  H04B7/04 ,  H04Q7/38 ,  H04B1/707

Abstract: A method of creating a path list for use in finger assignments comprising clearing a list of paths (12), choosing a sector for consideration from an active set of sectors (14), establishing a searcher window around the sector for cosideration (16), and determining up to "n" local maxima stronger than a threshold value (18). If a sector under consideration is transmitting on supplemental channels(19), the method involves artificially biasing the findings of the searcher window by a predetermined value (20). The biasing value may be constant, variable or proportional to the number of supplemental channels on the base station. After the local maxima corresponding to base stations transmitting on supplemental channels have been biased (20), the path lists are created (21).

公开(公告)号：NO20021271L

公开(公告)日：2002-05-14

申请号：NO20021271

申请日：2002-03-14

Applicant: QUALCOMM INC

Inventor： ACHOUR BAAZIZ ,  AMERGA MESSAY ,  GLAZKO SERGUEI A

IPC: H04B1/7117 ,  H04B1/7176 ,  H04B7/02 ,  H04B7/04 ,  H04Q7/38 ,  H04B1/707

Abstract: A method of creating a path list for use in finger assignments comprising clearing a list of paths (12), choosing a sector for consideration from an active set of sectors (14), establishing a searcher window around the sector for cosideration (16), and determining up to "n" local maxima stronger than a threshold value (18). If a sector under consideration is transmitting on supplemental channels(19), the method involves artificially biasing the findings of the searcher window by a predetermined value (20). The biasing value may be constant, variable or proportional to the number of supplemental channels on the base station. After the local maxima corresponding to base stations transmitting on supplemental channels have been biased (20), the path lists are created (21).

公开(公告)号：CA2679555C

公开(公告)日：2014-01-14

申请号：CA2679555

申请日：2008-03-26

Applicant: QUALCOMM INC

Inventor： HUTCHISON JAMES A ,  KANADE PARAG MOHAN ,  UMATT BHUPESH MANOHARLAL ,  TU ALEX KUANG-HSUAN ,  AMERGA MESSAY ,  MITTAL VINEET ,  SPARTZ MICHAEL KEVIN

IPC: H04W48/16 ,  H04W48/18 ,  H04W52/02

Abstract: Methods and apparatus for out of service processing with varied behaviors. In an aspect, a method is provided for service acquisition. The method includes determining one or more conditions, wherein each condition is associated with at least one weight, detecting whether an out-of-service event has occurred, and if an out-of-service event is detected: identifying selected conditions and associated weights, and processing the associated weights to determine service acquisition "on" and "off" times. In an aspect, an apparatus includes condition logic configured to determine one or more conditions, wherein each condition is associated with at least one weight, and processing logic configured to detect whether an out-of-service event has occurred, and if an out-of-service event is detected, to identify selected conditions and associated weights, and process the associated weights to determine service acquisition "on" and "off" times.