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    51.
    发明专利
    未知

    公开(公告)号：DE69836536D1

    公开(公告)日：2007-01-11

    申请号：DE69836536

    申请日：1998-04-28

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： FRIEBERG LORENZ FRED ,  ALLPRESS KENHOLME ,  LIN JIE DR ,  CAO QIANG ,  WOOD STEPHEN ANDREW

    IPC: H04B7/26 ,  H04J3/16 ,  H04J13/00 ,  H04W72/04

    Abstract: A time division multiple access communication system is disclosed, in which down link data are transmitted over a data channel in repeated time frames each containing a plurality of time slots. Down link set up information is transmitted over a control channel to indicate from which time slot a user terminal should extract data. Each frame on the data channel includes a user packet flag to indicate whether or not each time slot in the frame contains data. Each user terminal is responsive to the set up information and to the user packet flags to extract data from its assigned time slot in those frames which the slot is indicated to contain data.

    52.
    发明专利
    未知

    公开(公告)号：DE69832878T2

    公开(公告)日：2006-08-03

    申请号：DE69832878

    申请日：1998-10-05

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： CAO QIANG ,  LIN JIE ,  LIM SEAU SIAN ,  STANTON JAMES LESLIE ,  READER DAVID JONATHAN ,  FREIBERG LORENZ FRED

    IPC: H04B7/216 ,  H04J13/00 ,  H04Q7/38

    Abstract: There is disclosed a method of transmitting data in a code division multiple access system, comprising the steps of: outputting data blocks associated with a plurality of respective users in a plurality of corresponding data streams, the data blocks of each data stream being arranged in successive time frames of a constant, predetermined length; and multiplexing the data blocks on all the data streams for each given time frame. A communications system including circuitry for utilising such a method is also disclosed.

    53.
    发明专利
    未知

    公开(公告)号：DE60207981T2

    公开(公告)日：2006-08-03

    申请号：DE60207981

    申请日：2002-04-10

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： CAO QIANG ,  CHARRIERE PATRICK ,  LIM SEAU SIAN

    IPC: H04W36/14 ,  H04W48/10 ,  H04W48/12

    Abstract: A method is provided of informing mobile user terminals (12) camped on a cell of a base station (8) of a radio telecommunications network that a service is unavailable, such that a mobile user terminal (12) desirous of said service is handed over to another cell which provides said service. The method comprises informing the terminals (12) that selectably at least one of circuit-switched services (4) and packet-switched services (6) are unavailable.

    54.
    发明专利
    未知

    公开(公告)号：DE60028179D1

    公开(公告)日：2006-06-29

    申请号：DE60028179

    申请日：2000-03-14

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： BHATOOLAUL DAVID LAHIRI ,  CAO QIANG ,  CHARRIERE PATRICK ,  LIM SEAU SIAN

    IPC: H04B7/00 ,  H04J13/00 ,  H04B7/26 ,  H04J3/00 ,  H04M3/00 ,  H04W36/08 ,  H04W52/00 ,  H04W52/04 ,  H04W74/08

    Abstract: When a mobile is switched on in a cellular system, it first searches for the best cell that it can connect to and then attempts to send a message to the best cell found. In CDMA cellular systems, the likelihood of a mobile's RACH message being successfully received by a cell is largely dependent on its transmit power. Unfortunately having all mobiles transmit at the maximum power possible is in many circumstances not only unnecessary but also unacceptable due to the resultant intra-cell interference generated. A cellular mobile telephone network is disclosed in which a mobile station requests service in data modulated on a common random access channel (RACH) in a format associated with first a cell in which the mobile station is located. Base stations in cells neighbouring the first cell, are configured to demodulate the RACH message burst having the format associated with the first cell, and to pass the demodulated data to a radio network controller (RNC). This enables the average power required for a successful RACH transmission to be reduced.

    60.
    发明专利
    未知

    公开(公告)号：BR0100843A

    公开(公告)日：2001-10-30

    申请号：BR0100843

    申请日：2001-03-05

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： BHATOOLAUL DAVID LAHIRI ,  LIM SEAU SIAN ,  VENCESLASCHARRIERE PATRICK GEO ,  CAO QIANG

    IPC: H04J13/00 ,  H04B7/26 ,  H04J3/00 ,  H04M3/00 ,  H04W36/08 ,  H04W52/00 ,  H04W52/04 ,  H04W74/08 ,  H04Q7/32

    Abstract: When a mobile is switched on in a cellular system, it first searches for the best cell that it can connect to and then attempts to send a message to the best cell found. In CDMA cellular systems, the likelihood of a mobile's RACH message being successfully received by a cell is largely dependent on its transmit power. Unfortunately having all mobiles transmit at the maximum power possible is in many circumstances not only unnecessary but also unacceptable due to the resultant intra-cell interference generated. A cellular mobile telephone network is disclosed in which a mobile station requests service in data modulated on a common random access channel (RACH) in a format associated with first a cell in which the mobile station is located. Base stations in cells neighbouring the first cell, are configured to demodulate the RACH message burst having the format associated with the first cell, and to pass the demodulated data to a radio network controller (RNC). This enables the average power required for a successful RACH transmission to be reduced.

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