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    Method and apparatus of power control in a cdma dispatch system
    141.
    发明专利
    Method and apparatus of power control in a cdma dispatch system 未知

    公开(公告)号：AU3381397A

    公开(公告)日：1998-01-05

    申请号：AU3381397

    申请日：1997-06-06

    Applicant: QUALCOMM INC

    Inventor： GROB MATTHEW S ,  YAO YU-DONG ,  LEKVEN ERIC J

    IPC: H04B7/005 ,  H04B7/26 ,  H04W52/00 ,  H04W52/32 ,  H04W68/00 ,  H04W68/02

    Abstract: In a dispatch system, power of the forward link broadcast channel transmitted from a base station is controlled such that the power level is the minimum necessary and such that transmission of the forward link broadcast channel is terminated if no remote unit is located within the coverage area of the base station. In addition to transmitting a forward link broadcast signal, the base station monitors an access channel. A first remote unit in the base station coverage area receives and decodes the forward link broadcast signal. The first remote unit determines a signal quality of said forward link broadcast signal. If the signal quality is unacceptable, the remote unit transmits a power request access message. The base station responds to the request by increasing the transmission power of forward link broadcast channel. If no requests are received at the base station, the forward link broadcast channel is slowly decreased to a minimum. Transmission of the forward link broadcast channel may be terminated completely.

    METHOD AND APPARATUS FOR EFFICIENT SYSTEM ACCESS IN A DISPATCH SYSTEM
    142.
    发明专利
    METHOD AND APPARATUS FOR EFFICIENT SYSTEM ACCESS IN A DISPATCH SYSTEM 未知

    公开(公告)号：CA2258938A1

    公开(公告)日：1997-12-31

    申请号：CA2258938

    申请日：1997-06-23

    Applicant: QUALCOMM INC

    Inventor： YAO YU-DONG ,  GROB MATTHEW S ,  LEKVEN ERIC J

    IPC: H04B7/26 ,  H04W4/10 ,  H04W84/08 ,  H04Q7/28 ,  H04J3/17

    Abstract: A method and apparatus to provide access to a dispatch system is disclosed. A communications manager (40) grants an exclusive system talker privilege to one remote unit (10) in the system at a time. After a remote unit (10) requests and is designated as the exclusive system talker, no other remote unit (20, 22) may transmit for a first pre-determined amount of time. After the first pre-determined time has elapsed, any other remote unit (20, 22) may request the exclusive system talker privilege and become the exclusive system talker. The exclusive system talker privilege is revoked by the communications manager (40) to any remote unit who retains the exclusive system talker privilege for more than a second pre-determined amount of time. The exclusive system talker privilege is also revoked upon the release of a push-to-talk button on a remote unit (10). Furthermore, a base station (44) in communication with a remote unit (10) designated as the exclusive system talker will generate a surrogate relinquishment request to the communications manager (40) if the exclusive system talker travels outside the coverage area of the system, loses power, or is destroyed.

    148.
    发明专利
    未知

    公开(公告)号：FI962035A0

    公开(公告)日：1996-05-13

    申请号：FI962035

    申请日：1996-05-13

    Applicant: QUALCOMM INC

    Inventor： BAYLEY GWAIN ,  GROB MATTHEW S ,  KARMI GADI ,  KIMBALL ROBERT H ,  PROPACH DAVID S

    IPC: H04M11/00 ,  H04W76/04 ,  H04Q

    Abstract: A method of invoking and canceling voice and data service between a mobile unit and a base station. Using a standard telephone system, the connection for a voice service and a data service is the same. With the introduction of the digital wireless link, the voice connection and the data connection are different. Therefore new dialing commands which indicate the intent of the connection are created. These commands can also be used to designate the intent of the call from a mobile unit capable of data and voice service but not capable of simultaneous voice and data service. They can also be used to invoke simultaneous voice and data services.

    150.
    发明专利
    未知

    公开(公告)号：BR9405750A

    公开(公告)日：1995-12-05

    申请号：BR9405750

    申请日：1994-11-14

    Applicant: QUALCOMM INC

    Inventor： GROB MATTHEW S ,  KARMI GADI

    IPC: H04B7/26 ,  H04L1/18 ,  H04L12/56 ,  H04M11/06 ,  H04N1/00 ,  H04W28/06 ,  H04W76/02 ,  H04W92/18 ,  H04Q7/22

    Abstract: An apparatus and method of providing communications between standard unmodified terminal equipment over a telephone link that includes a digital wireless link. The digital wireless link introduces substantial time variable delay. In order to pass time sensitive messages over the link, time sensitive messages are recognized and translated into time insensitive messages for transmission over the wireless link. The time insensitive messages indicate the information contained in the time sensitive messages and in the timing of the time sensitive messages. At the receiving end, the time insensitive messages are recognized and the time sensitive messages reconstructed with the appropriate timing.

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