公开(公告)号：EP1336118A2

公开(公告)日：2003-08-20

申请号：EP01997032.6

申请日：2001-11-14

Applicant: QUALCOMM INCORPORATED

Inventor： AMERGA, Messay ,  PATRICK, Christopher ,  RICK, Roland ,  ROWITCH, Douglas, N. ,  YOUNIS, Saed

IPC: G01S5/02

CPC classification number: H04W64/00 ,  G01S5/0273 ,  G01S19/06 ,  G01S19/46 ,  H04B7/2606

Abstract: Techniques to detect whether or not a remote terminal is under the coverage of a repeater within a wireless communication network, which may be based on (1) a list of base stations expected to be received while under the repeater's coverage, (2) the characterized environment of the repeater, and/or (3) the propagation delays for a transmission received at the remote terminal. Additional ambiguity resulting from being under a repeater's coverage may also be accounted for and/or compensated by (1) discarding time measurements from repeated base stations, (2) adjusting the processing for position estimation to account for the additional ambiguity due to the repeater, (3) computing a series of position estimates based on multiple transmissions received from the same originating base station and selecting the best estimate, and/or (4) computing a series of position estimates based on multiple transmissions from multiple originating base stations and selecting the best estimate.

公开(公告)号：EP1319319A2

公开(公告)日：2003-06-18

申请号：EP01973143.9

申请日：2001-09-12

Applicant: QUALCOMM INCORPORATED

Inventor： CHEN, Jiangxin ,  NEUFELD, Arthur ,  GLAZKO, Serguei ,  AMERGA, Messay

IPC: H04Q7/38

CPC classification number: H04W68/00 ,  H04W52/0216 ,  H04W52/0245 ,  Y02D70/122

Abstract: A mobile station selectively operates in quick paging mode (108) or in slotted paging mode (110). If the quality of the channel exceeds a threshold (106), then the mobile station operated in quick paging mode; otherwise in slotted paging mode. The mobile station measures channel quality by measuring various quality metrics (112-120) made during several previous pages (124), preferably over a period of about ten seconds (128). The quality metrics, and the previous pages, are preferably all given equal weight (122, 126).

Abstract translation: 移动台选择性地以快速寻呼模式（108）或时隙寻呼模式（110）操作。 如果信道的质量超过阈值（106），则移动站以快速寻呼模式操作; 否则在时隙寻呼模式。 移动站通过测量在几个之前的页面（124）中做出的各种质量度量（112-120）来测量信道质量，优选地在大约十秒（128）的周期内。 质量度量和先前的页面优选地被赋予相同的权重（122,126）。

公开(公告)号：EP2345171B1

公开(公告)日：2018-10-17

申请号：EP09793076.2

申请日：2009-09-28

Applicant: QUALCOMM Incorporated

Inventor： DONG, Brian ,  AMERGA, Messay ,  BHATTACHARJEE, Supratik ,  ZHU, Xiaoming

IPC: H04B1/7073 ,  H04B1/7075 ,  H04B1/7083 ,  H04W36/30 ,  H04W48/16

CPC classification number: H04B1/7083 ,  H04B1/70735 ,  H04B1/70753 ,  H04B1/70758 ,  H04B2201/70702 ,  H04W36/30 ,  H04W48/16

Abstract: Cell timing is detected by first trying to detect a target handover cell through detecting a primary synchronization channel (P-SCH) followed by a common pilot channel (CPICH). If that fails, N number of retrials is performed using a full-window search on the CPICH. The full-window CPICH search is performed blindly, without any slot timing information from the P-SCH. Performance is improved while maintaining the benefits of faster acquisition methods in good channel conditions. The full-window search is more time consuming, but takes advantage of the stronger CPICH transmission. In good channel conditions, a mobile device can proceed quickly with the normal method of timing acquisition. With failure, the mobile device can switch to the longer search which has a higher probability of successfully completing the hard handover procedure. The overall effect is a higher success rate of hard handovers without a uniform increase of time spent in cell timing acquisition.

公开(公告)号：EP1516435B1

公开(公告)日：2018-05-30

申请号：EP03734508.9

申请日：2003-06-10

Applicant: QUALCOMM INCORPORATED

Inventor： AMERGA, Messay ,  NAGPAL, Vikas ,  NEW, Wen Jing ,  RAO, Subramanya, P. ,  SUBRAHMANYA, Parvathanathan ,  UMATT, Bhupesh Manoharlal

IPC: H04B1/707

CPC classification number: H04W48/16 ,  H04B1/707 ,  H04B1/70735 ,  H04B17/27 ,  H04B17/318 ,  H04B17/382 ,  H04L2027/0034 ,  H04W24/00 ,  H04W52/0245 ,  Y02D70/1222 ,  Y02D70/40

Abstract: Techniques for reducing the time required for frequency scan in acquisition are disclosed. In one aspect, received power measurements are made at one or more of the possible carrier frequencies and system search is performed on one or more of those frequencies when the power measurement exceeds a threshold. In another aspect, the power is measured at one or more frequencies in a band of frequencies surrounding a frequency at which the measured power exceeded a threshold. If the measured power at one or more of the frequencies in the band exceeds a second threshold, a system search is performed at one or more of those frequencies. In yet another aspect, frequencies meeting certain criteria are sorted in order of measured power prior to system search or further power measurement, and subsequent processing is performed in order of descending measured power. Various other aspects are also presented. These aspects have the benefit of reducing acquisition time, which results in faster system access and allows for more efficient use of system resources.

公开(公告)号：EP1532837B1

公开(公告)日：2016-09-14

申请号：EP03791734.1

申请日：2003-08-19

Applicant: QUALCOMM INCORPORATED

Inventor： AMERGA, Messay ,  HALBHAVI, Sudhir

IPC: H04W36/30 ,  H04W52/02

CPC classification number: H04W36/30 ,  H04W52/0229 ,  Y02D70/1222 ,  Y02D70/1262 ,  Y02D70/24

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：EP1454161B1

公开(公告)日：2011-06-29

申请号：EP02792387.9

申请日：2002-12-12

Applicant: QUALCOMM INCORPORATED

Inventor： RICK, Roland, R. ,  STEIN, Jeremy ,  AMERGA, Messay ,  FERNANDEZ-CORBATON, Ivan ,  RISTIC, Borislav ,  BHATIA, Ashok

IPC: G01S5/14

CPC classification number: H04W64/00 ,  G01S5/0257 ,  G01S19/48

Abstract: A position determination system and apparatus for utilizing a network of cellular base stations to determine position of a mobile station includes taking a plurality of statistically independent data measurements of the pilot signals from the base stations. Each of the data measurements includes an earliest time of arrival, providing multiple independent measurements for each of the pilot signals. For each cellular base station, a representative measurement is calculated responsive to the independent measurements, which is used to determine position of the mobile station using an AFLT algorithm and/or in conjunction with a GPS algorithm. In some embodiments, the data measurements for each pilot signal further include an RMSE estimate and time of measurement for each time of arrival, and an energy measurement for all resolvable paths. If the mobile station comprises a cell phone, a cell search list and a GPS search list may be provided by a cell base station.

公开(公告)号：EP1350336B1

公开(公告)日：2010-11-24

申请号：EP02707459.0

申请日：2002-01-10

Applicant: QUALCOMM INCORPORATED

Inventor： RICK, Roland, R. ,  GLAZKO, Serguei ,  MALHOTRA, Rohit ,  AMERGA, Messay

IPC: H04B1/707

CPC classification number: H04B1/7117 ,  H04B7/0697

Abstract: An apparatus, such as a subscriber unit or a base station within a spread spectrum communication system, may add one or more additional 'virtual' paths to a list of candidate paths when assigning demodulation elements. These 'virtual' paths are added as candidate paths even though a corresponding peak was not necessarily detected within a received spread spectrum system. The list of paths may include a first path having a time offset approximately equal to a time offset for one of the demodulation elements, and the virtual path having a short time separation from the first path. The time separation between the paths may be, for example, less than 2 chips.

公开(公告)号：EP1269788B1

公开(公告)日：2010-05-05

申请号：EP01924544.8

申请日：2001-03-30

Applicant: QUALCOMM INCORPORATED

Inventor： BAYLEY, Gwain ,  HUGHES, Robbin ,  AMERGA, Messay

IPC: H04W48/20

CPC classification number: H04W48/20

公开(公告)号：EP2057748A1

公开(公告)日：2009-05-13

申请号：EP07841499.2

申请日：2007-08-28

Applicant: QUALCOMM Incorporated

Inventor： AMERGA, Messay ,  SINGH, Gurdeep ,  RAO, Anil ,  CHIKKAPPA, Kiran ,  KUMAR, Chandra ,  GOLLAMUDI, Maheedhar ,  KESHAVA, Sudarshan

IPC: H04B1/16 ,  H04Q7/32

CPC classification number: H04W52/029 ,  H04W76/27 ,  H04W76/28 ,  Y02D70/24

Abstract: An access terminal (102) reacquires a system frame number (SFN) when a difference between a continuous counter elapsed time (220) and a calculated elapsed time (222) exceeds a threshold. The continuous counter elapsed time (220) is generated by a continuous counter (122) remaining active during a sleep state of the access terminal (102) and the calculated elapsed time (222) is based on a SFN derived from a counter value generated by a discontinuous counter (124) that is deactivated during the sleep state. In one aspect, the continuous counter (122) may be clocked by a continuous clock (118) during a sleep mode and the discontinuous counter (124) may be clocked by a faster clock (120) that is deactivated during the sleep mode. During reactivation after the sleep mode, the discontinuous counter (120) is set, at the counter set time, to a reset counter value (126) corresponding to an SFN indicated by the continuous counter (122).

公开(公告)号：EP1920538A1

公开(公告)日：2008-05-14

申请号：EP06801102.2

申请日：2006-08-08

Applicant: Qualcomm Incorporated

Inventor： AMERGA, Messay ,  UMATT, Bhupesh Manoharlal ,  MITTAL, Vineet

IPC: H04B1/16 ,  H04M1/73 ,  H04Q7/32

CPC classification number: H04W52/287 ,  H04W52/0229 ,  Y02D70/1222 ,  Y02D70/1242

Abstract: The disclosure is directed to techniques for performing service signal searches with reduced power consumption when a wireless communication device is operating out of service. The techniques include placing the wireless communication device in a "deep sleep" mode when the wireless communication device is not in service. When operating in the deep sleep mode, the wireless communication device reduces power consumption by not looking for paging signals or searching for service signals. The wireless communication device then may periodically enter a wake-up period during which power consumption is increased to perform signal searches in one or more frequency bands. The wireless communication device returns to the deep sleep mode when the signal searches are unsuccessful.