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公开(公告)号：HK1046790A1
公开(公告)日：2003-01-24
申请号：HK02108214
申请日：2002-11-13
Applicant: QUALCOMM INC
Inventor： CHEN TAO , LIN YU-CHUAN
Abstract: The present invention is a novel and improved method and system for performing the pilot frequency tracking operation for coherent demodulation in a system employing a gated pilot signal. In particular, the present invention describes a method and apparatus in which two frequency tracking loops operate in parallel. The first frequency tracking loop performs its tracking operation based on the hypothesis that the received pilot is continuous throughout the frame's duration. The second frequency tracking loop performs the tracking operation based on the hypothesis that the received pilot is discontinuous and is only present for a portion of the frame's duration.
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公开(公告)号：NO20025478L
公开(公告)日：2003-01-10
申请号：NO20025478
申请日：2002-11-15
Applicant: QUALCOMM INC
Inventor： TIEDEMANN JR EDWARD G , JOU YU-CHEUN , LIN YU-CHUAN
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公开(公告)号：NO20025478A
公开(公告)日：2003-01-10
申请号：NO20025478
申请日：2002-11-15
Applicant: QUALCOMM INC
Inventor： TIEDEMANN JR EDWARD G , JOU YU-CHEUN , LIN YU-CHUAN
CPC classification number: H04W28/18 , H04L2012/5632 , H04W28/22 , H04W48/16
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公开(公告)号：ZA9807506B
公开(公告)日：1999-06-30
申请号：ZA9807506
申请日：1998-08-19
Applicant: QUALCOMM INC
Inventor： CHEN TAO , LIN YU-CHUAN
CPC classification number: H04L47/824 , H04L47/10 , H04L47/14 , H04L47/15 , H04L47/2433 , H04L47/30 , H04L47/70 , H04L47/72 , H04L47/767 , H04L47/805 , H04W28/16 , H04W28/22 , H04W36/18 , H04W52/12 , H04W52/367 , H04W72/1268
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公开(公告)号：AU7246698A
公开(公告)日：1998-10-30
申请号：AU7246698
申请日：1998-04-07
Applicant: QUALCOMM INC
Inventor： TIEDEMANN EDWARD G JR , CHEN TAO , JOU YU-CHEUN , LIN YU-CHUAN
IPC: H04L12/56 , H04W28/22 , H04W36/02 , H04W36/08 , H04W36/12 , H04W36/18 , H04W36/38 , H04W72/04 , H04W72/12 , H04B7/24
Abstract: A method of and apparatus for scheduling data transmissions in a communication network comprising at least one cell (2a to 2g) and at least one scheduled user (6a to 6e) improves utilization of the reverse link and decreases the transmission delay in data communication. The apparatus comprises a controller (92) for collecting status information for said communication network and for scheduling data transmissions from said at least one cell (2a to 2g) to said at least one scheduled user (6a to 6e). A memory (94) is connected to said controller for storing said status information, and a timer (96) is connected to provide timing signals to said controller (92). The timing signals enable said controller to perform scheduling of data transmission. Each remote station is assigned a maximum unscheduled transmission rate for the duration of the communication with a cell. A maximum scheduled transmission rate can be assigned by a channel scheduler (12) for scheduled transmission of data traffic at high rates. The maximum scheduled transmission rate is assigned in accordance with a set of system goals, a list of system constraints, and collected information on the status of the communication network. Data is partitioned in data frames and transmitted over the reverse link at or below the maximum scheduled transmission rate which have been assigned to the scheduled user.
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Patent Agency Ranking
公开(公告)号：ES2500926T3
公开(公告)日：2014-10-01
申请号：ES10718010
申请日：2010-05-07
Applicant: QUALCOMM INC
Inventor： HU JUN , LIN YU-CHUAN , SHAHIDI REZA , RAMASAMI VIJAYA C , GARACH RAVINDRA M
Abstract: Un procedimiento (700) para asignar potencia entre múltiples interfaces aéreas para un dispositivo (10) de comunicación que presta soporte a la transmisión simultánea por múltiples interfaces aéreas (110, 120), comprendiendo el procedimiento: determinar (702) un primer nivel de potencia que se usa para transmitir por una primera interfaz aérea; determinar (704) un segundo nivel de potencia disponible para transmitir por una segunda interfaz; comparar (706) el primer nivel de potencia con el segundo nivel de potencia disponible para transmitir por una segunda interfaz; en donde, si la comparación (706) muestra que se ha superado un umbral diferencial de potencia: determinar (710) un segundo nivel estimado de potencia para transmitir por la segunda interfaz aérea, de modo que la diferencia entre el primer nivel de potencia y el segundo nivel estimado de potencia no supere el umbral diferencial de potencia; y en en el que, si la comparación (706) muestra que el umbral diferencial de potencia no se ha superado: fijar (708) el nivel estimado de potencia para transmitir por la segunda interfaz aérea en el segundo nivel de potencia disponible determinado (704); y generar (712) una restricción de carga útil en base a la potencia, basada en al menos el segundo nivel estimado de potencia.
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公开(公告)号：DE60141962D1
公开(公告)日：2010-06-10
申请号：DE60141962
申请日：2001-06-28
Applicant: QUALCOMM INC
Inventor： GLAZKO SERGUEI , ACHOUR BAAZIZ , LIN YU-CHUAN
Abstract: A system and method for detecting discontinuous transmission (DTX) frames. The inventive method includes the steps of receiving data transmitted in a plurality of frames; classifying each of the frames; analyzing the classification of a number of successive frames of the received data and providing a metric with respect thereto; and determining, in response to the metric, if a frame is a discontinuous frame. In the illustrative embodiment, the step of classifying includes the step of error checking the frames using a cyclic redundancy check (CRC) error checking protocol. The received frames are classified as good frames (G), erasure frames (E), or discontinuous frames (D). A numerical value is assigned to each of the frames based on the classification thereof. Next, the frames are filtered to provide an output Yn=Yn-1+Xn where 'n' is a frame number, Yn is the filter output for a given frame n, Yn-1 is the filter output for a previous frame, and Xn is a stream of input frames. A threshold is set for the output Yn to facilitate the detection of discontinuous frames. That is, a detection of a discontinuous transmission frame is indicated when a frame is classified as an 'erasure' and the filter output exceeds the threshold. On the detection of a discontinuous frame, the classification of the frame is changed from 'erasure' to 'discontinuous'. By reclassifying improperly classified erasure frames, the mobile receiver is inhibited from requesting retransmission of the frames or a change in the transmit power level. Consequently, network throughput and capacity are optimized and system power is conserved.
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公开(公告)号：DE69841049D1
公开(公告)日：2009-09-17
申请号：DE69841049
申请日：1998-02-10
Applicant: QUALCOMM INC
Inventor： JOU YU-CHEN , LIN YU-CHUAN , ODENWALDER JOSEPH P , TIEDEMANN EDWARD G
IPC: H04L29/06 , H04W72/04 , H04B7/005 , H04B7/26 , H04L29/08 , H04W28/18 , H04W28/20 , H04W28/22 , H04W52/28 , H04W52/34 , H04W72/12
Abstract: In a communication system capable of variable rate transmission, scheduling of high speed data transmission improves utilization of the forward link and decreases the transmission delay in data communication. Each remote station is assigned one primary code channel for the duration of the communication with a cell. Secondary code channels of various types and transmission capabilities can be assigned by a channel scheduler for scheduled transmission of data traffic at high rates. Secondary code channels are assigned in accordance with a set of system goals, a list of parameters, and collected information on the status of the communication network. Secondary code channels can be grouped into sets of secondary code channels. Data is partitioned in data frames and transmitted over the primary and secondary code channels which have been assigned to the scheduled user.
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公开(公告)号：DE69838767T2
公开(公告)日：2008-10-23
申请号：DE69838767
申请日：1998-02-10
Applicant: QUALCOMM INC
Inventor： JOU YU-CHEN , LIN YU-CHUAN , ODENWALDER JOSEPH P , TIEDEMANN EDWARD G
IPC: H04L29/06 , H04B7/005 , H04B7/26 , H04L29/08 , H04W28/18 , H04W28/20 , H04W28/22 , H04W52/28 , H04W52/34 , H04W72/04 , H04W72/12
Abstract: In a communication system capable of variable rate transmission, scheduling of high speed data transmission improves utilization of the forward link and decreases the transmission delay in data communication. Each remote station is assigned one primary code channel for the duration of the communication with a cell. Secondary code channels of various types and transmission capabilities can be assigned by a channel scheduler for scheduled transmission of data traffic at high rates. Secondary code channels are assigned in accordance with a set of system goals, a list of parameters, and collected information on the status of the communication network. Secondary code channels can be grouped into sets of secondary code channels. Data is partitioned in data frames and transmitted over the primary and secondary code channels which have been assigned to the scheduled user.
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公开(公告)号：DE69835423T2
公开(公告)日：2007-02-22
申请号：DE69835423
申请日：1998-04-07
Applicant: QUALCOMM INC
Inventor： TIEDEMANN G , CHEN TAO , JOU YU-CHEUN , LIN YU-CHUAN
IPC: H04B7/26 , H04L12/56 , H04W28/22 , H04W36/02 , H04W36/08 , H04W36/12 , H04W36/18 , H04W36/38 , H04W72/04 , H04W72/12
Abstract: A method of and apparatus for scheduling data transmissions in a communication network comprising at least one cell (2a to 2g) and at least one scheduled user (6a to 6e) improves utilization of the reverse link and decreases the transmission delay in data communication. The apparatus comprises a controller (92) for collecting status information for said communication network and for scheduling data transmissions from said at least one cell (2a to 2g) to said at least one scheduled user (6a to 6e). A memory (94) is connected to said controller for storing said status information, and a timer (96) is connected to provide timing signals to said controller (92). The timing signals enable said controller to perform scheduling of data transmission. Each remote station is assigned a maximum unscheduled transmission rate for the duration of the communication with a cell. A maximum scheduled transmission rate can be assigned by a channel scheduler (12) for scheduled transmission of data traffic at high rates. The maximum scheduled transmission rate is assigned in accordance with a set of system goals, a list of system constraints, and collected information on the status of the communication network. Data is partitioned in data frames and transmitted over the reverse link at or below the maximum scheduled transmission rate which have been assigned to the scheduled user.
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