公开(公告)号：CA2509383A1

公开(公告)日：2004-06-24

申请号：CA2509383

申请日：2003-12-11

Applicant: QUALCOMM INC

Inventor： JOSHI ABHAY A ,  NEUFELD ARTHUR J ,  RISTIC BORISLAV ,  SALAMAN GLENN ,  RAHMAT ARIE ,  JOHNSON PAUL K ,  BHATIA ASHOK ,  ROH MARK CHARLES

IPC: G01S19/25 ,  G01S19/10 ,  G01S19/12 ,  G01S19/26 ,  H04B7/204 ,  H04B7/26 ,  G01S5/14 ,  H04B1/38

Abstract: A wireless remote unit performs SPS acquisition interleaved with receiving paging information over a wireless slotted paging channel and receiving data packets over a wireless data communication system. The remote unit tunes to a pilot channel, synchronizes to an internal clock of the wireless remote unit with a pilot signal transmitted over the pilot channel; and starts a search for SPS satellites after completing synchronization with the internal clock.

公开(公告)号：SG173240A1

公开(公告)日：2011-08-29

申请号：SG2010007557

申请日：2006-01-31

Applicant: QUALCOMM INC

Inventor： JOSHI ABHAY A ,  REZAIIFAR RAMIN ,  TURNER SIMON

IPC: H04W74/00 ,  H04B1/707 ,  H04W88/06

Abstract: TECHNIQUES FOR ACCESSING A WIRELESS COMMUNICATION SYSTEMWITH TUNE-AWAY CAPABILITYTo access a first communication system, a terminal determines a transmission time for anaccess probe, an expected response time from the system, and a protected time intervalbased on the transmission time and/or expected response time. The terminal determines astarting time for sending the access probe such that the protected time interval does notoverlap a tune-away interval in which the terminal is to monitor anther frequency/air-interface. This starting time may be set initially to the end of a prior access probe plus apseudo-random wait duration and may be advanced forward or moved backward in time,if needed, by a time duration selected such that the protected time interval does notoverlap the tune-away interval.Figure 8

公开(公告)号：AU2002316645B2

公开(公告)日：2007-11-01

申请号：AU2002316645

申请日：2002-07-12

Applicant: QUALCOMM INC

Inventor： JOSHI ABHAY A ,  LEVIN MARK ,  AMERGA MESSAY

IPC: H04B1/00 ,  H04B1/7117 ,  H04B7/08 ,  H04B7/26

Abstract: A method for assigning tracking elements includes sorting a list of potential assignments according to a diversity criterion. In one example, a list of received signal instances is sorted first according to a measure of energy and then sorted again according to the diversity criterion. In a further embodiment, a demodulation element may be labeled available for assignment yet continue to output demodulated symbols in a locked state. Applications to a mobile station of a CDMA system for cellular telephony are discussed.

公开(公告)号：AU2003287281A1

公开(公告)日：2004-06-07

申请号：AU2003287281

申请日：2003-10-29

Applicant: QUALCOMM INC

Inventor： JOSHI ABHAY A ,  HUTCHISON JAMES A ,  BLACK PETER J ,  TURNER SIMON ,  EKVETCHAVIT THUNYACHATE

IPC: H04L12/28 ,  H04W48/18 ,  H04W88/06

Abstract: Techniques to efficiently attempt acquisition of a packet data system (e.g., an IS-856 system). If a terminal has acquired one or more channels in a voice/data system (e.g., an IS-2000 system), then it can attempt acquisition on channels in the packet data system that are co-located with the acquired channels in the voice/data system. Multiple acquisition modes may be used, and on-going acquisition attempts on the co-located channels may be performed using one acquisition mode at a time in order to reduce power consumption. Acquisition attempts may be performed in a “ping-pong” manner to improve the likelihood of acquisition. For a ping-pong search, an acquisition attempt is made on the most recently acquired channel prior to an acquisition attempt on each of the remaining channels. Received signal strength estimates may also be obtained for selected channels and may be used to determine whether or not to attempt acquisition on these channels.

公开(公告)号：BR0317009A

公开(公告)日：2005-10-25

申请号：BR0317009

申请日：2003-12-04

Applicant: QUALCOMM INC

Inventor： JOSHI ABHAY A ,  NEUFELD ARTHUR J ,  YOON STEVEN ,  EKVETCHAVIT THUNYACHATE

IPC: H04W48/20 ,  H04W52/02 ,  H04B1/707

Abstract: A wireless mobile telephone (400) is operated so as manage the performance of "off-frequency searches," that is, searches for base station pilot signals that differ in frequency from the pilot signals in the mobile station's active set. Whenever frequency searching is performed (such as responsive to emerging from a reduced-power sleep mode), the mobile station performs on-frequency pilot signal searching (902) upon a prescribed active set frequency. Only if a prescribed off-frequency searching condition (903-908) is satisfied, the mobile station additionally performs off-frequency pilot signal searching (912) upon one or more neighboring base stations' frequencies.

公开(公告)号：BR0211057A

公开(公告)日：2004-10-26

申请号：BR0211057

申请日：2002-07-12

Applicant: QUALCOMM INC

Inventor： AMERGA MESSAY ,  JOSHI ABHAY A ,  LEVIN MARK

IPC: H04B1/00 ,  H04B1/7117 ,  H04B7/08 ,  H04B7/26 ,  H04B1/707

Abstract: A method for assigning tracking elements includes sorting a list of potential assignments according to a diversity criterion. In one example, a list of received signal instances is sorted first according to a measure of energy and then sorted again according to the diversity criterion. In a further embodiment, a demodulation element may be labeled available for assignment yet continue to output demodulated symbols in a locked state. Applications to a mobile station of a CDMA system for cellular telephony are discussed.

公开(公告)号：AU2003293537A1

公开(公告)日：2004-06-30

申请号：AU2003293537

申请日：2003-12-11

Applicant: QUALCOMM INC

Inventor： BHATIA ASHOK ,  JOSHI ABHAY A ,  NEUFELD ARTHUR J ,  SALAMAN GLENN ,  JOHNSON PAUL K ,  RAHMAT ARIE ,  RISTIC BORISLAV ,  ROH MARK CHARLES

IPC: G01S19/25 ,  G01S19/10 ,  G01S19/12 ,  G01S19/26 ,  H04B7/204 ,  H04B7/26 ,  G01S5/14 ,  H04B1/38

Abstract: A wireless remote unit performs SPS acquisition interleaved with receiving paging information over a wireless slotted paging channel and receiving data packets over a wireless data communication system. The remote unit tunes to a pilot channel, synchronizes to an internal clock of the wireless remote unit with a pilot signal transmitted over the pilot channel; and starts a search for SPS satellites after completing synchronization with the internal clock.

公开(公告)号：AU2003293435A8

公开(公告)日：2004-06-30

申请号：AU2003293435

申请日：2003-12-04

Applicant: QUALCOMM INC

Inventor： JOSHI ABHAY A ,  EKVETCHAVIT THUNYACHATE ,  NEUFELD ARTHUR J ,  YOON STEVEN

IPC: H04W48/20 ,  H04W52/02 ,  H04B1/707

Abstract: A wireless mobile telephone (400) is operated so as manage the performance of "off-frequency searches," that is, searches for base station pilot signals that differ in frequency from the pilot signals in the mobile station's active set. Whenever frequency searching is performed (such as responsive to emerging from a reduced-power sleep mode), the mobile station performs on-frequency pilot signal searching (902) upon a prescribed active set frequency. Only if a prescribed off-frequency searching condition (903-908) is satisfied, the mobile station additionally performs off-frequency pilot signal searching (912) upon one or more neighboring base stations' frequencies.

公开(公告)号：AU2003293435A1

公开(公告)日：2004-06-30

申请号：AU2003293435

申请日：2003-12-04

Applicant: QUALCOMM INC

Inventor： EKVETCHAVIT THUNYACHATE ,  JOSHI ABHAY A ,  NEUFELD ARTHUR J ,  YOON STEVEN

IPC: H04W48/20 ,  H04W52/02

Abstract: A wireless mobile telephone (400) is operated so as manage the performance of "off-frequency searches," that is, searches for base station pilot signals that differ in frequency from the pilot signals in the mobile station's active set. Whenever frequency searching is performed (such as responsive to emerging from a reduced-power sleep mode), the mobile station performs on-frequency pilot signal searching (902) upon a prescribed active set frequency. Only if a prescribed off-frequency searching condition (903-908) is satisfied, the mobile station additionally performs off-frequency pilot signal searching (912) upon one or more neighboring base stations' frequencies.

公开(公告)号：CA2453119A1

公开(公告)日：2003-01-23

申请号：CA2453119

申请日：2002-07-12

Applicant: QUALCOMM INC

Inventor： AMERGA MESSAY ,  JOSHI ABHAY A ,  LEVIN MARK

IPC: H04B1/00 ,  H04B1/7117 ,  H04B7/08 ,  H04B7/26 ,  H04B1/707

Abstract: A method for assigning tracking elements includes sorting a list of potentia l assignments according to a diversity criterion. In one example, a list of received signal instances is sorted first according to a measure of energy a nd then sorted again according to the diversity criterion. In a further embodiment, a demodulation element may be labeled available for assignment y et continue to output demodulated symbols in a locked state. Applications to a mobile station of a CDMA system for cellular telephony are discussed.