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    System and method for dtx frame detection
    53.
    发明专利
    System and method for dtx frame detection 未知

    公开(公告)号：AU7167201A

    公开(公告)日：2002-01-14

    申请号：AU7167201

    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

    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.

    Method and apparatus for reverse link rate scheduling
    54.
    发明专利
    Method and apparatus for reverse link rate scheduling 未知

    公开(公告)号：HK1029886A1

    公开(公告)日：2001-04-12

    申请号：HK00107811

    申请日：2000-12-05

    Applicant: QUALCOMM INC

    Inventor： CHEN TAO ,  LIN YU-CHUAN

    IPC: H04L12/56 ,  H04J13/00 ,  H04W28/22 ,  H04W36/18 ,  H04W72/12 ,  H04Q

    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.

    Method of scheduling data transmissions in a communication network
    55.
    发明专利
    Method of scheduling data transmissions in a communication network 未知

    公开(公告)号：HK1025707A1

    公开(公告)日：2000-11-17

    申请号：HK00104617

    申请日：2000-07-25

    Applicant: QUALCOMM INC

    Inventor： TIEDEMANN EDWARD G JR ,  CHEN TAO ,  JOU YU-CHEUN ,  LIN YU-CHUAN

    IPC: H04B20060101 ,  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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