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    METHOD AND APPARATUS FOR MOBILE UNIT ASSISTED CDMA TO ALTERNATIVE SYSTEM HARD HANDOFF
    63.
    发明专利
    METHOD AND APPARATUS FOR MOBILE UNIT ASSISTED CDMA TO ALTERNATIVE SYSTEM HARD HANDOFF 未知

    公开(公告)号：CA2216635A1

    公开(公告)日：1996-10-03

    申请号：CA2216635

    申请日：1996-03-19

    Applicant: QUALCOMM INC

    Inventor： WEAVER LINDSAY A JR ,  TIEDEMANN EDWARD G JR ,  BAYLEY GWAIN ,  GILHOUSEN KLEIN S

    IPC: H04W36/14 ,  H04Q7/38 ,  H04Q7/36

    Abstract: A method and apparatus for providing a reliable means to perform handoff from a code division multiple access (CDMA) system using a pilot signal to an alternative access technique system. Simple pilot box circuitry (350) is added to a set of border base stations (C2A - C2R). The border base stations (C2A C2R) are base stations which operate only in the alternative access technique and which have coverage areas which are contiguous with coverage areas of CDMA operation base stations. The mobile unit monitors for the pilot signal from the border base stations (C2A - C2R) in the same manner as it monitors for pilot signals from the CDMA operation base stations (C1A - C1s). When the mobile unit detects the pilot signal corresponding to a border base station (C2A - C2R), it notifies a system controller (202) in accordance with standard operation. The system controller (202) is aware that the pilot signal corresponds to a border base station (C2A - C2R) and thus triggers a hard handoff process to the alternative access technique system in response thereto.

    Apparatus and method for reducing power consumption in a mobile communications receiver
    64.
    发明专利
    Apparatus and method for reducing power consumption in a mobile communications receiver 未知

    公开(公告)号：IL104911A

    公开(公告)日：1996-08-04

    申请号：IL10491193

    申请日：1993-03-02

    Applicant: QUALCOMM INC

    Inventor： TIEDEMANN EDWARD G JR ,  WEAVER LINDSAY A JR ,  KERR RICHARD J ,  GEIB KENNETH M

    IPC: H04B1/16 ,  H04B7/26 ,  H04J3/16 ,  H04W24/00 ,  H04W48/08 ,  H04W52/02 ,  H04W56/00 ,  H04W72/04 ,  H04W72/12 ,  H04W74/04 ,  H04Q7/20 ,  H04B7/216

    Abstract: A system for reducing receiver power consumption in communication system having a transmitter and one or more receivers schedules periodic messages in "slots." Each receiver is assigned a slot during which it monitors the transmissions. The transmitter transmits messages to the receiver only during the assigned slots. The receiver is in an "active state" during its assigned slot. It may remain in the active state after its assigned slot if the message requires the receiver to perform additional actions. During the "inactive state," which is the time period between successive occurrences of its assigned slot, the receiver may perform any action not requiring coordination with the transmitter. It may conserve power during this time by removing power from one or more components such as those used for monitoring the transmissions. At a time during the inactive state shortly before the assigned slot, the receiver applies power to these components and performs initializations. Such initializations may include reacquiring a pilot channel signal to which the receiver may synchronize itself if its timing signals have drifted out of synchronization with those of the transmitter during the preceding inactive state.

    METHOD AND APPARATUS FOR TESTING A DIGITAL COMMUNICATION CHANNEL AT VARIABLE OR FIXED DATA RATES
    65.
    发明专利
    METHOD AND APPARATUS FOR TESTING A DIGITAL COMMUNICATION CHANNEL AT VARIABLE OR FIXED DATA RATES 未知

    公开(公告)号：CA2206251A1

    公开(公告)日：1996-06-06

    申请号：CA2206251

    申请日：1995-11-29

    Applicant: QUALCOMM INC

    Inventor： BAYLEY GWAIN ,  TIEDEMANN EDWARD G JR ,  JOU YU-CHEUN ,  WEAVER LINDSAY A JR

    IPC: H04L1/00 ,  H04B3/46 ,  H04B7/26 ,  H04B17/00 ,  H04L1/20 ,  H04L1/24 ,  H04L27/00 ,  H04L69/40

    Abstract: The invention provides a system and method for testing signal transmission quality wihin a digital communication system and may be incorporated within a digital cellular communication system in which information is exchanged over spread spectrum communication channels. A test sequence of digital data transmitted over the communication channel is received at a receiving station, within which is also generated a replica of the test sequence of digital data. The accuracy of transmission over the communication channel is then determined by comparing the replica of the test sequence of digital data to the test sequence of data received over the communication channel. The invention allows the test sequence of digital data to be transmitted at one of a set of known data rates, with the received station being disposed to identify the data rate associated with each test sequence of digital data. In order to simulate the transmission of, for example, voice data, the system may be configured such that each test sequence of digital data is generated in accordance with a pseudorandom process.

    Apparatus and Method for Adding and Removing a Base Station from a Cellular Communications System
    68.
    发明专利
    Apparatus and Method for Adding and Removing a Base Station from a Cellular Communications System 未知

    公开(公告)号：CA2173983A1

    公开(公告)日：1996-03-21

    申请号：CA2173983

    申请日：1995-09-12

    Applicant: QUALCOMM INC

    Inventor： WEAVER LINDSAY A JR ,  BENDER PAUL E

    IPC: B60S5/04 ,  H04B7/005 ,  H04B7/26 ,  H04W16/06 ,  H04W36/18 ,  H04W52/40 ,  H04W52/52 ,  H04Q7/36

    Abstract: An apparatus and method for adding and removing a target base station from a network of base stations, which includes base stations adjacent the target base station. The apparatus is comprised of two attenuators: a first for setting an artificial receive noise power level and a second for setting a transmit level. The transmit level determines the forward link coverage area of the base station. The artificial noise level sets the reverse link coverage area of the base station. When a base station is added, initially the transmit power is low and the artificial receive noise power is high such that the forward and reverse link coverage areas are collocated in close proximity to the base station. As the base station blossoms into full operation, the artificial receive noise power is decreased and the transmit level is increased such that the two coverage areas of the base station remain balanced as the coverage areas expand. When a base station is to be removed from a system, the same attenuators are used to wilt the two coverage areas in unison as the power level transmitted from the base station decreases.

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