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11.发明专利
公开(公告)号：HK1090229A1
公开(公告)日：2006-12-15
申请号：HK06110365
申请日：2006-09-19
Applicant: QUALCOMM INC
Inventor： NEUFELD ARTHUR JAMES , JOSHI ABHAY ARVIND , ANDRUS DON NIELSEN , GURSKI REMI JONATHAN , EKVETCHAVIT THUNYACHATE
Abstract: A novel and improved method and apparatus provide for controlling an operation of an access terminal while processing a signal from an access point in a communication system. Various aspects of the invention provide for an access terminal to disable a handoff process when its demodulator or decoder is operating to demodulate or decode a control message received from an access point. The operation of the access terminal is controlled in a manner that prevents terminating prematurely the demodulation and decoding process of a control signal by a handoff process. As a result, the access terminal may continue operating in a normal wake up/ sleep cycle period while conserving its battery power.
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公开(公告)号：BR0215955A
公开(公告)日：2005-09-13
申请号：BR0215955
申请日：2002-11-26
Applicant: QUALCOMM INC
Abstract: A receiver system determines a current preamble threshold and a current preamble metric and determines whether a preamble is detected. If a preamble is detected, the receiver determines whether an earlier preamble has been detected in an earlier time slot having a common time slot interlace index, and resolves multiple detections of a preamble based on at least one of the current preamble and an old preamble thresholds, the current and an old preamble metrics. The receiver decodes data following the selected preamble and determines the CRC of the decoded data. If a CRC failure is detected, the receiver determines a new current preamble threshold. The new current preamble threshold is larger than the current preamble threshold. If the current preamble metric is larger than the new current preamble threshold, the receiver determines the CRC failure as an actual CRC failure, otherwise as a false CRC failure.
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13.发明专利
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
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.
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公开(公告)号：BRPI0514817A
公开(公告)日：2008-06-24
申请号：BRPI0514817
申请日：2005-08-25
Applicant: QUALCOMM INC
Inventor： EKVETCHAVIT THUNYACHATE , GOVINDARAJULA RAVI
Abstract: For coverage determination and system switching, a terminal obtains pilot strength estimates for base stations in first and second wireless communication systems (e.g., packet data system and voice/data system) and received signal quality estimates for at least one serving base station in the first system. The terminal derives various metrics based on the received signal quality estimates and pilot strength estimates. The terminal may perform handoff to the second system if weak coverage is detected for the first system, a received signal quality metric (Q) for the first system is below a Qth—dn threshold, and a pilot strength metric (V) for the second system exceeds a Vth—dn threshold. The terminal may perform handoff to the first system if good coverage is detected for this system, metric Q exceeds a Qth—up threshold, or a maximum pilot strength metric (M) for the first system exceeds a Mth—up threshold.
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Patent Agency Ranking
公开(公告)号：BRPI0407445A
公开(公告)日：2006-01-31
申请号：BRPI0407445
申请日：2004-02-12
Applicant: QUALCOMM INC
Inventor： BLACK PETER J , REZAIIFAR RAMIN , EKVETCHAVIT THUNYACHATE
Abstract: Techniques to determine whether or not a terminal is under the coverage of a current wireless communication system (e.g., a packet data system) and to switch from the current system to another wireless communication system (e.g., a voice/data system). In one method, at least one measurement of at least one parameter for at least one base station in the current system is initially obtained. The measurement(s) may be SNR measurements. A metric is derived based on the mcasurcmcnt(s) and used (typically along with a metric threshold and a timer) to determine whether or not the terminal is within the coverage of the current system. A switch to another system is initiated if the terminal is deemed to be outside the coverage of the current system. The two systems provide at least one common service (e.g., packet data service).
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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
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.
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18.发明专利
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
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.
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19.发明专利
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
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.
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公开(公告)号：CA2501435A1
公开(公告)日：2004-06-10
申请号：CA2501435
申请日：2002-11-26
Applicant: QUALCOMM INC
Abstract: A receiver system determines a current preamble threshold and a current preamble metric and determines whether a preamble is detected. If a preamble is detected, the receiver determines whether an earlier preamble has been detected in an earlier time slot having a common time slot interlace index, and resolves multiple detections of a preamble based on at least one of the current preamble and an old preamble thresholds, the current and an old preamble metrics. The receiver decodes data following the selected preamble and determines the CRC of the decoded data. If a CRC failure is detected, th e receiver determines a new current preamble threshold. The new current preamb le threshold is larger than the current preamble threshold. If the current preamble metric is larger than the new current preamble threshold, the receiver determines the CRC failure as an actual CRC failure, otherwise as a false CRC failure.
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