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    11.
    发明专利
    未知

    公开(公告)号：BR9806115A

    公开(公告)日：1999-08-31

    申请号：BR9806115

    申请日：1998-02-10

    Applicant: QUALCOMM INC

    Inventor： TIEDEMANN EDWARD G JR ,  LIN YU-CHUAN ,  JOU YU-CHEUN ,  ODENWALDER JOSEPH P

    IPC: H04L29/06 ,  H04B7/005 ,  H04B7/26 ,  H04L29/08 ,  H04W28/18 ,  H04W28/20 ,  H04W28/22 ,  H04W52/28 ,  H04W52/34 ,  H04W72/04 ,  H04W72/12 ,  H04Q7/22 ,  H04Q7/38

    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.

    Method and apparatus for reverse link rate scheduling
    12.
    发明专利
    Method and apparatus for reverse link rate scheduling 未知

    公开(公告)号：AU9201398A

    公开(公告)日：1999-03-08

    申请号：AU9201398

    申请日：1998-08-20

    Applicant: QUALCOMM INC

    Inventor： CHEN TAO ,  LIN YU-CHUAN

    IPC: H04J13/00 ,  H04L12/56 ,  H04W28/22 ,  H04W36/18 ,  H04W72/12 ,  H04Q7/38 ,  H04Q7/22

    Abstract: In a communication system capable of variable rate transmission, multi-level scheduling improves utilization of the reverse link and decreases the transmission delay in data communication. Multi-level scheduling comprises base station level scheduling, selector level (system level) scheduling, and network level scheduling. Network level scheduling is performed for base station in soft handoff with base stations which are controlled by different selector scheduler. Selector level scheduling is performed for remote stations in soft handoff with base stations which are controlled by the same selector scheduler. And base station level scheduling is performed for remote stations not in soft handoff. Base station level scheduled is performed using residual capacity after higher level scheduling have been performed. Each scheduling level can have different scheduling interval.

    SYSTEM AND METHOD FOR DTX FRAME DETECTION
    13.
    发明申请
    SYSTEM AND METHOD FOR DTX FRAME DETECTION 审中-公开
    用于DTX帧检测的系统和方法

    公开(公告)号：WO0203588A3

    公开(公告)日：2002-06-20

    申请号：PCT/US0120819

    申请日：2001-06-28

    Applicant: QUALCOMM INC

    Inventor： GLAZKO SERGUEI ,  ACHOUR BAAZIZ ,  LIN YU-CHUAN

    IPC: H04B7/26 ,  H04J3/14 ,  H04J3/17 ,  H04L1/20 ,  H04Q7/38

    CPC classification number: H04L1/20 ,  H04J3/14 ,  H04J3/17 ,  H04L1/201

    Abstract: A system and method for dectecting discontinuous transmission (DTX) frames. The inventive method includes the steps of receiving data transmitted in a pluralitz of frames (62); classifzing each of the frames (63); 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 (66). In the illustrative embodiment, the step of classifzing includes the step of error checking the frames using a cyclic redundancz check (CRC) error checking protocol. The received frames are classified as good frames (G), erasureframes (E), or discontinuous frames (D). A numerical value is assigned toe ach of the frames based on the classification thereof. Next, the frames are filtered tp provice 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 transmisson 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 of a change in the transmit power level. Consequently, network throughput and capacity are optimized and system power is conserved.

    Abstract translation: 一种用于检测不连续传输（DTX）帧的系统和方法。 本发明的方法包括以下步骤：接收以多个帧（62）发送的数据; 分类每个帧（63）; 分析接收到的数据的多个连续帧的分类并提供关于其的度量; 以及响应于该度量确定帧是否是不连续帧（66）。 在说明性实施例中，分类步骤包括使用循环冗余校验（CRC）错误校验协议来错误检查帧的步骤。 接收的帧被分类为好帧（G），擦除帧（E）或不连续帧（D）。 基于其分类将数值分配给多个帧。 接下来，对帧进行滤波，以提供输出Y n = Y n-1 + X n，其中'n'是帧号，Y n是给定帧n的滤波器输出，Y n-1是前一帧的滤波器输出， Xn是输入帧的流。 为输出Yn设置阈值以便于检测不连续的帧。 也就是说，当帧被分类为“擦除”并且滤波器输出超过阈值时，指示不连续传输帧的检测。 在检测到不连续的帧时，帧的分类从“擦除”变为“不连续”。 通过重新分类不正确分类的擦除帧，禁止移动接收机请求重发发射功率电平变化的帧。 因此，网络吞吐量和容量得到优化，系统功率得到节约。

    19.
    发明专利
    未知

    公开(公告)号：AT306750T

    公开(公告)日：2005-10-15

    申请号：AT00957409

    申请日：2000-08-10

    Applicant: QUALCOMM INC

    Inventor： CHEN TAO ,  LIN YU-CHUAN

    IPC: H04B1/707 ,  H04B7/26 ,  H04L27/00 ,  H04J13/04

    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.

    20.
    发明专利
    未知

    公开(公告)号：BR0307365A

    公开(公告)日：2004-12-14

    申请号：BR0307365

    申请日：2003-01-31

    Applicant: QUALCOMM INC

    Inventor： LIN YU-CHUAN

    IPC: H04B1/707 ,  H04B7/005 ,  H04L1/20 ,  H04L12/56 ,  H04W24/00 ,  H04W52/02 ,  H04W52/28 ,  H04W52/44

    Abstract: Novel techniques are disclosed for detecting discontinuous transmission (DTX) over a communication channel. A received data frame is characterized as one of a Good frame, Erasure, or DTX. If a Good frame is not initially detected, a multi-dimensional quality metric is used to characterize the received frame as either an Erasure or DTX. A two dimensional quality metric may be generated using energy per bit to noise power ratio as a first dimension and re-encoded symbol error count as a second dimension. Alternatively, re-encoded symbol energy may be used as the second dimension of the quality metric. The communication channel may be a CDMA wireless communication channel capable of DTX and the device may be a base station, base station controller, or mobile station.

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