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    CELLULAR TIME DIVISION TELECOMMUNICATIONS SYSTEMS
    11.
    发明专利
    CELLULAR TIME DIVISION TELECOMMUNICATIONS SYSTEMS 未知

    公开(公告)号：CA2366426A1

    公开(公告)日：2002-07-24

    申请号：CA2366426

    申请日：2001-12-28

    Applicant: LUCENT TECHNOLOGIES INC

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

    IPC: H04B7/212 ,  H04B7/26 ,  H04J3/16 ,  H04L12/56 ,  H04W16/14 ,  H04W28/06 ,  H04W72/04 ,  H04W74/04 ,  H04W84/04 ,  H04L5/22

    Abstract: To reduce interference between physically close base and mobile station s belonging to uncoordinated systems of different operators, in a cellular tim e division telecommunications system, e.g. the TDD mode of UMTS, a method of operation comprises providing a sequence of time frames, each time frame including a plurality of time slots, each time slot having an allocated upli nk or downlink channel, wherein the positions of said time slots of said channels are changed in consecutive time frames of said sequence according to a deterministic sequence, e.g. a cyclic rotation. In an initial set up operation, the base station may instruct a mobile station to transmit or receive in certain time slots, and that these time slots should be changed in succeeding frames according to a predefined algorithm transmitted to the mobile station.

    14.
    发明专利
    未知

    公开(公告)号：BR0107055A

    公开(公告)日：2002-08-06

    申请号：BR0107055

    申请日：2001-11-27

    Applicant: LUCENT TECHNOLOGIES INC

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

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

    Abstract: In order to double the size of cells for a UMTS/ UTRAN system operating in time division mode (TDD) from 3.75 km to 7.5 km, the node B station defines the 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 adjusts its timing in reponse to timing deviation signals (64) transmitted at the start of each downlink bust, so as to transmit an uplink burst which arrive at the Node B, at the beginning of the next uplink slot.

    CONTROLLING TRANSMIT POWER OF PICOCELL BASE UNITS
    20.
    发明申请
    CONTROLLING TRANSMIT POWER OF PICOCELL BASE UNITS 审中-公开
    控制PICOCELL基站单元的发送功率

    公开(公告)号：WO2007139680A3

    公开(公告)日：2008-04-03

    申请号：PCT/US2007011366

    申请日：2007-05-11

    Applicant: LUCENT TECHNOLOGIES INC ,  CLAUSSEN HOLGER ,  HO LESTER TSE WEE ,  KARIMI HAMID REZA ,  SAMUEL LOUIS GWYN

    Inventor： CLAUSSEN HOLGER ,  HO LESTER TSE WEE ,  KARIMI HAMID REZA ,  SAMUEL LOUIS GWYN

    IPC: H04W16/32

    CPC classification number: H04W52/244 ,  H04W16/32 ,  H04W52/143

    Abstract: A transmit power control technique within a wireless communication system includes adjusting a transmit power used by a picocell base station unit based upon a position of the picocell within a macrocell. When a picocell base station unit is located relatively close to a macrocell base station or center of the macrocell, the transmit power of the picocell base station unit is increased to avoid downlink interference from the macrocell base station for mobile stations communicating within the picocell. When a picocell base station unit is located relatively close to an edge of a macrocell, the transmit power of the picocell base station is decreased to avoid interference caused by the picocell base station unit for mobile stations communicating within the macrocell in the vicinity of the picocell. In a disclosed example determined downlink interference levels provide an indication of the position of the picocell within the macrocell and provide an indication of how to automatically adjust the transmit power of the picocell base station unit.

    Abstract translation: 无线通信系统内的发射功率控制技术包括：基于微蜂窝小区中的位置来调整微微小区基站单元使用的发射功率。 当微微小区基站单元相对靠近宏小区基站或宏小区的中心位置时，增加微微小区基站单元的发射功率，以避免来自宏小区基站的用于在微微小区内通信的移动站的下行干扰。 当微微小区基站单元位于相对靠近宏小区的边缘时，微微小区基站的发射功率减小，以避免由微微小区基站单元对微微小区附近的宏小区内通信的移动站造成的干扰 。 在公开的示例中，确定的下行链路干扰电平提供微蜂窝在宏小区内的位置的指示，并提供如何自动调整微微小区基站单元的发射功率的指示。

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