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    COMMUNICATION SYSTEM OPERATING METHOD
    3.
    发明专利
    COMMUNICATION SYSTEM OPERATING METHOD 审中-公开

    公开(公告)号：JP2003219481A

    公开(公告)日：2003-07-31

    申请号：JP2002014476

    申请日：2002-01-23

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： ELOY STEPHANE ,  FALAKI HAMID REZA ,  KARIMI HAMID REZA ,  LE GOFF YVON

    IPC: H04J3/00 ,  H04W16/02 ,  H04W72/04 ,  H04Q7/38

    Abstract: PROBLEM TO BE SOLVED: To reduce or overcome the problem of interference between a base station and mobile stations belonging to a system not adjusted by different operators at a TDD mode of a UMTS. SOLUTION: The method of operating a communication system has a step of preparing a sequence of time frames in a radio link, each time frame has a plurality of time slots, each time slot has an allotted channel, and the position of the time slot or the allotted channel varies in the following time frame of the sequence according to a specified method. COPYRIGHT: (C)2003,JPO

    FRAME STRUCTURE FOR CELLULAR TELECOMMUNICATIONS SYSTEM
    4.
    发明专利
    FRAME STRUCTURE FOR CELLULAR TELECOMMUNICATIONS SYSTEM 审中-公开

    公开(公告)号：JP2002238072A

    公开(公告)日：2002-08-23

    申请号：JP2001373800

    申请日：2001-12-07

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： BRIAND JACQUES ,  FALAKI HAMID REZA ,  KARIMI HAMID REZA ,  GOFF YVON LE ,  SOULABAIL ROLAND

    IPC: H04J3/00 ,  H04B7/212 ,  H04B7/26 ,  H04L7/10 ,  H04W56/00 ,  H04Q7/36

    Abstract: PROBLEM TO BE SOLVED: To provide a frame structure for cellular telecommunication systems. SOLUTION: In order to double the size of cells for a UMTS/ UTRAN(Universal Mobile Terrestrial System/UMTS Terrestrial Radio Access Network) system operating in time division mode (TDD) from 3.75 km to 7.5 km, the node B station defines a guard period (66) for a downlink slot followed by an adjacent uplink slot to be longer than the guard period (68) for an uplink slot, followed by an adjacent downlink slot, whereby the cell size is extended. Each UE(user equipment) adjusts its timing, in response to timing deviation signals (64) transmitted at the start of each downlink burst, so as to transmit an uplink burst which arrive at the node B, at the beginning of the next uplink slot.

    6.
    发明专利
    未知

    公开(公告)号：DE602005001603D1

    公开(公告)日：2007-08-23

    申请号：DE602005001603

    申请日：2005-11-15

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： KARIMI HAMID REZA ,  KUZMINSKIY ALEXANDR ,  LEUNG KIN K

    IPC: H04L12/28 ,  H04L1/16 ,  H04L12/56 ,  H04W16/28 ,  H04W80/00 ,  H04W84/12 ,  H04W92/10

    Abstract: The present invention provides a method and an apparatus for communicating data over a network between a communication node, for example, an access point having a first and a second antenna and a first and a second mobile station. The method comprises weighting a first data at the access point to transmit the first data using the first and second antennas so that the first mobile station only receives the first data and weighting a second data at the access point to transmit the second data using the first and second antennas so that the second mobile station only receives the second data. A space division multiple access (SDMA) module may cause a transmission protocol to transmit the first data to the first mobile station on the downlink and transmit the second data to the second mobile station in parallel to the transmission of the first data on the downlink. In a telecommunication system, this substantially simultaneous transmission of the first and second data using a similar carrier frequency in a radio frequency communication over a wireless local area network (WLAN) may increase throughput of a downlink, for example, by a factor nominally equal to the number of antennas at an access point.

    10.
    发明专利
    未知

    公开(公告)号：DE602005001603T2

    公开(公告)日：2008-04-10

    申请号：DE602005001603

    申请日：2005-11-15

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： KARIMI HAMID REZA ,  KUZMINSKIY ALEXANDR ,  LEUNG KIN K

    IPC: H04L12/28 ,  H04L1/16 ,  H04L12/56 ,  H04W16/28 ,  H04W80/00 ,  H04W84/12 ,  H04W92/10

    Abstract: The present invention provides a method and an apparatus for communicating data over a network between a communication node, for example, an access point having a first and a second antenna and a first and a second mobile station. The method comprises weighting a first data at the access point to transmit the first data using the first and second antennas so that the first mobile station only receives the first data and weighting a second data at the access point to transmit the second data using the first and second antennas so that the second mobile station only receives the second data. A space division multiple access (SDMA) module may cause a transmission protocol to transmit the first data to the first mobile station on the downlink and transmit the second data to the second mobile station in parallel to the transmission of the first data on the downlink. In a telecommunication system, this substantially simultaneous transmission of the first and second data using a similar carrier frequency in a radio frequency communication over a wireless local area network (WLAN) may increase throughput of a downlink, for example, by a factor nominally equal to the number of antennas at an access point.

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